tree dissolve + instances

src/bundles/camera.rs

@@ -20,6 +20,7 @@ impl Bundle for CameraBundle
         let transform = Transform::from_position(self.position);
         world.cameras.insert(camera_entity, camera_component);
         world.transforms.insert(camera_entity, transform);
+        world.names.insert(camera_entity, "Camera".to_string());
         Ok(camera_entity)
     }
 }

src/bundles/player.rs

@@ -6,9 +6,10 @@ use rapier3d::control::{CharacterAutostep, KinematicCharacterController};
 use rapier3d::prelude::{ColliderBuilder, RigidBodyBuilder};
 
 use crate::bundles::Bundle;
-use crate::components::jump::JumpComponent;
 use crate::components::lights::spot::SpotlightComponent;
-use crate::components::{InputComponent, MeshComponent, MovementComponent, PhysicsComponent};
+use crate::components::{
+    InputComponent, JumpComponent, MeshComponent, MovementComponent, PhysicsComponent,
+};
 use crate::entity::EntityHandle;
 use crate::loaders::mesh::Mesh;
 use crate::physics::PhysicsManager;
@@ -70,7 +71,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerFallingState, PlayerIdleState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             let has_input = world
                 .inputs
@@ -82,7 +83,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerFallingState, PlayerWalkingState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             let has_input = world
                 .inputs
@@ -94,7 +95,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerIdleState, PlayerWalkingState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             let has_input = world
                 .inputs
@@ -106,7 +107,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerWalkingState, PlayerIdleState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             let has_input = world
                 .inputs
@@ -118,7 +119,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerIdleState, PlayerFallingState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             !is_grounded
         });
@@ -126,7 +127,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerWalkingState, PlayerFallingState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             !is_grounded
         });
@@ -134,7 +135,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerIdleState, PlayerJumpingState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             let jump_pressed = world
                 .inputs
@@ -146,7 +147,7 @@ impl Bundle for PlayerBundle
         state_machine.add_transition::<PlayerWalkingState, PlayerJumpingState>(move |world| {
             let is_grounded = world
                 .movements
-                .with(entity_id, |m| m.movement_config.movement_context.is_floored)
+                .with(entity_id, |m| m.movement_context.is_floored)
                 .unwrap_or(false);
             let jump_pressed = world
                 .inputs
@@ -159,14 +160,14 @@ impl Bundle for PlayerBundle
             world
                 .jumps
                 .with(entity_id, |jump| {
-                    jump.jump_config.jump_context.duration >= jump.jump_config.jump_duration
+                    jump.jump_context.duration >= jump.jump_duration
                 })
                 .unwrap_or(true)
         });
 
         world.transforms.insert(entity, spawn_transform);
         world.movements.insert(entity, MovementComponent::new());
-        world.jumps.insert(entity, JumpComponent::new());
+        world.jumps.insert(entity, JumpComponent::default());
         world.inputs.insert(entity, InputComponent::default());
         world.physics.insert(
             entity,
@@ -189,6 +190,7 @@ impl Bundle for PlayerBundle
         );
         world.player_tags.insert(entity, ());
         world.state_machines.insert(entity, state_machine);
+        world.names.insert(entity, "Player".to_string());
 
         let outer_angle = PI / 2.0 * 0.9;
         world.spotlights.insert(

src/bundles/spotlight.rs

@@ -19,6 +19,7 @@ impl Bundle for SpotlightBundle
         let transform = Transform::from_matrix(self.light_data.transform);
         world.transforms.insert(entity, transform);
         world.spotlights.insert(entity, self.light_data.component);
+        world.names.insert(entity, "Spotlight".to_string());
         if let Some(tag) = self.light_data.tag
         {
             if tag == "lighthouse"
@@ -34,12 +35,13 @@ impl Bundle for SpotlightBundle
 
 pub fn spawn_spotlights(world: &mut World, spotlights: Vec<LightData>)
 {
-    for light_data in spotlights
+    for (index, light_data) in spotlights.into_iter().enumerate()
     {
         let entity = world.spawn();
         let transform = Transform::from_matrix(light_data.transform);
         world.transforms.insert(entity, transform);
         world.spotlights.insert(entity, light_data.component);
+        world.names.insert(entity, format!("Spotlight_{}", index));
         if let Some(tag) = light_data.tag
         {
             if tag == "lighthouse"

src/bundles/terrain.rs

@@ -4,7 +4,7 @@ use glam::Vec2;
 use nalgebra::vector;
 use rapier3d::prelude::{ColliderBuilder, RigidBodyBuilder};
 
-use crate::components::{MeshComponent, PhysicsComponent};
+use crate::components::{MeshComponent, PhysicsComponent, TreeInstancesComponent};
 use crate::entity::EntityHandle;
 use crate::loaders::mesh::{InstanceData, InstanceRaw, Mesh};
 use crate::loaders::terrain::load_heightfield_from_exr;
@@ -78,6 +78,7 @@ impl TerrainBundle
                         enable_snow_light: true,
                     },
                 );
+                world.names.insert(entity, "Terrain".to_string());
 
                 if !physics_added
                 {
@@ -125,7 +126,7 @@ impl TerrainBundle
                     device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
                         label: Some("Tree Instance Buffer"),
                         contents: bytemuck::cast_slice(&instance_raw),
-                        usage: wgpu::BufferUsages::VERTEX,
+                        usage: wgpu::BufferUsages::VERTEX | wgpu::BufferUsages::COPY_DST,
                     })
                 });
 
@@ -135,13 +136,18 @@ impl TerrainBundle
                     MeshComponent {
                         mesh: Rc::new(mesh),
                         pipeline: render::Pipeline::Standard,
-                        instance_buffer: Some(instance_buffer),
+                        instance_buffer: Some(instance_buffer.clone()),
                         num_instances: num_instances as u32,
                         tile_scale: 4.0,
                         enable_dissolve: true,
                         enable_snow_light: false,
                     },
                 );
+                world.tree_instances.insert(
+                    entity,
+                    TreeInstancesComponent::new(instances, Rc::new(instance_buffer)),
+                );
+                world.names.insert(entity, "Trees".to_string());
             }
         }
 

src/components/jump.rs

@@ -3,22 +3,6 @@ use kurbo::CubicBez;
 
 #[derive(Clone)]
 pub struct JumpComponent
-{
-    pub jump_config: JumpConfig,
-}
-
-impl JumpComponent
-{
-    pub fn new() -> Self
-    {
-        Self {
-            jump_config: JumpConfig::default(),
-        }
-    }
-}
-
-#[derive(Clone, Copy)]
-pub struct JumpConfig
 {
     pub jump_height: f32,
     pub jump_duration: f32,
@@ -30,7 +14,7 @@ pub struct JumpConfig
     pub jump_context: JumpContext,
 }
 
-impl Default for JumpConfig
+impl Default for JumpComponent
 {
     fn default() -> Self
     {
@@ -56,22 +40,3 @@ pub struct JumpContext
     pub origin_height: f32,
     pub normal: Vec3,
 }
-
-impl JumpContext
-{
-    fn start(time: f32, current_height: f32, surface_normal: Vec3) -> Self
-    {
-        Self {
-            in_progress: false,
-            duration: 0.0,
-            execution_time: time,
-            origin_height: current_height,
-            normal: surface_normal,
-        }
-    }
-
-    pub fn stop(&mut self)
-    {
-        self.in_progress = false;
-    }
-}

src/components/mod.rs

@@ -9,12 +9,17 @@ pub mod movement;
 pub mod noclip;
 pub mod physics;
 pub mod rotate;
+pub mod tree_instances;
+pub mod trigger;
 
 pub use camera::CameraComponent;
 pub use dissolve::DissolveComponent;
 pub use follow::FollowComponent;
 pub use input::InputComponent;
+pub use jump::JumpComponent;
 pub use mesh::MeshComponent;
 pub use movement::MovementComponent;
 pub use physics::PhysicsComponent;
 pub use rotate::RotateComponent;
+pub use tree_instances::TreeInstancesComponent;
+pub use trigger::{TriggerComponent, TriggerEvent, TriggerEventKind, TriggerFilter, TriggerShape, TriggerState};

src/components/movement.rs

@@ -3,22 +3,6 @@ use kurbo::CubicBez;
 
 #[derive(Clone)]
 pub struct MovementComponent
-{
-    pub movement_config: MovementConfig,
-}
-
-impl MovementComponent
-{
-    pub fn new() -> Self
-    {
-        Self {
-            movement_config: MovementConfig::new(),
-        }
-    }
-}
-
-#[derive(Clone)]
-pub struct MovementConfig
 {
     pub walking_acceleration: f32,
     pub walking_acceleration_duration: f32,
@@ -29,7 +13,7 @@ pub struct MovementConfig
     pub movement_context: MovementContext,
 }
 
-impl MovementConfig
+impl MovementComponent
 {
     pub fn new() -> Self
     {

src/components/tree_instances.rs

@@ -0,0 +1,27 @@
+use crate::loaders::mesh::InstanceData;
+use std::rc::Rc;
+use wgpu::Buffer;
+
+pub struct TreeInstancesComponent
+{
+    pub instances: Vec<InstanceData>,
+    pub dissolve_amounts: Vec<f32>,
+    pub dissolve_targets: Vec<f32>,
+    pub transition_speed: f32,
+    pub instance_buffer: Rc<Buffer>,
+}
+
+impl TreeInstancesComponent
+{
+    pub fn new(instances: Vec<InstanceData>, instance_buffer: Rc<Buffer>) -> Self
+    {
+        let num_instances = instances.len();
+        Self {
+            instances,
+            dissolve_amounts: vec![0.0; num_instances],
+            dissolve_targets: vec![0.0; num_instances],
+            transition_speed: 5.0,
+            instance_buffer,
+        }
+    }
+}

src/components/trigger.rs

@@ -0,0 +1,37 @@
+use crate::entity::EntityHandle;
+
+pub enum TriggerShape
+{
+    Sphere { radius: f32 },
+}
+
+pub enum TriggerFilter
+{
+    Player,
+}
+
+pub enum TriggerState
+{
+    Idle,
+    Inside,
+}
+
+pub struct TriggerComponent
+{
+    pub shape: TriggerShape,
+    pub filter: TriggerFilter,
+    pub state: TriggerState,
+}
+
+pub enum TriggerEventKind
+{
+    Entered,
+    Exited,
+}
+
+pub struct TriggerEvent
+{
+    pub trigger_entity: EntityHandle,
+    pub activator_entity: EntityHandle,
+    pub kind: TriggerEventKind,
+}

src/debug/collider_debug.rs

@@ -150,6 +150,7 @@ pub fn render_collider_debug() -> Vec<DrawCall>
                 enable_dissolve: false,
                 enable_snow_light: false,
                 displacement_bind_group: None,
+                entity: None,
             });
         }
     });
@@ -183,6 +184,7 @@ pub fn render_collider_debug() -> Vec<DrawCall>
                 enable_dissolve: false,
                 enable_snow_light: false,
                 displacement_bind_group: None,
+                entity: None,
             });
         }
     });

src/editor/inspector.rs

@@ -1,7 +1,11 @@
 use dear_imgui_rs::{Condition, Context};
 use dear_imgui_wgpu::{WgpuInitInfo, WgpuRenderer};
+use glam::EulerRot;
 use sdl3_sys::events::SDL_Event;
 
+use crate::entity::EntityHandle;
+use crate::world::World;
+
 pub struct FrameStats
 {
     pub fps: f32,
@@ -57,7 +61,12 @@ impl Inspector
         self.imgui.io().want_capture_mouse()
     }
 
-    pub fn build_ui(&mut self, stats: &FrameStats)
+    pub fn build_ui(
+        &mut self,
+        stats: &FrameStats,
+        world: &World,
+        selected_entity: Option<EntityHandle>,
+    )
     {
         let ui = self.imgui.frame();
         ui.window("Inspector")
@@ -68,6 +77,113 @@ impl Inspector
                 ui.text(format!("Physics:    {:.1} ms", stats.physics_budget_ms));
                 ui.text(format!("Draw calls: {}", stats.draw_call_count));
             });
+
+        if let Some(entity) = selected_entity
+        {
+            ui.window("Entity")
+                .position([10.0, 120.0], Condition::FirstUseEver)
+                .build(|| {
+                    let name = world
+                        .names
+                        .get(entity)
+                        .cloned()
+                        .unwrap_or_else(|| format!("Entity #{}", entity));
+                    ui.text(format!("Name: {}", name));
+                    ui.text(format!("ID:   {}", entity));
+
+                    ui.separator();
+                    ui.text("Transform");
+
+                    if let Some(transform) = world.transforms.get(entity)
+                    {
+                        let p = transform.position;
+                        ui.text(format!("  Pos   ({:.2}, {:.2}, {:.2})", p.x, p.y, p.z));
+
+                        let (ex, ey, ez) = transform.rotation.to_euler(EulerRot::XYZ);
+                        ui.text(format!(
+                            "  Rot   ({:.1}, {:.1}, {:.1}) deg",
+                            ex.to_degrees(),
+                            ey.to_degrees(),
+                            ez.to_degrees()
+                        ));
+
+                        let s = transform.scale;
+                        ui.text(format!("  Scale ({:.2}, {:.2}, {:.2})", s.x, s.y, s.z));
+                    }
+                    else
+                    {
+                        ui.text("  (no transform)");
+                    }
+
+                    ui.separator();
+                    ui.text("Components");
+
+                    if world.meshes.get(entity).is_some()
+                    {
+                        ui.text("  Mesh");
+                    }
+                    if world.physics.get(entity).is_some()
+                    {
+                        ui.text("  Physics");
+                    }
+                    if let Some(m) = world.movements.get(entity)
+                    {
+                        ui.text(format!(
+                            "  Movement (max_speed {:.1})",
+                            m.max_walking_speed
+                        ));
+                    }
+                    if world.jumps.get(entity).is_some()
+                    {
+                        ui.text("  Jump");
+                    }
+                    if world.inputs.get(entity).is_some()
+                    {
+                        ui.text("  Input");
+                    }
+                    if world.player_tags.get(entity).is_some()
+                    {
+                        ui.text("  [Player]");
+                    }
+                    if world.tree_tags.get(entity).is_some()
+                    {
+                        ui.text("  [Tree]");
+                    }
+                    if let Some(cam) = world.cameras.get(entity)
+                    {
+                        ui.text(format!(
+                            "  Camera fov={:.0} near={:.2} far={:.0}",
+                            cam.fov.to_degrees(),
+                            cam.near,
+                            cam.far
+                        ));
+                    }
+                    if let Some(spot) = world.spotlights.get(entity)
+                    {
+                        let o = spot.offset;
+                        ui.text(format!(
+                            "  Spotlight offset ({:.1}, {:.1}, {:.1})",
+                            o.x, o.y, o.z
+                        ));
+                    }
+                    if let Some(ti) = world.tree_instances.get(entity)
+                    {
+                        ui.text(format!("  TreeInstances ({})", ti.instances.len()));
+                    }
+                    if world.follows.get(entity).is_some()
+                    {
+                        ui.text("  Follow");
+                    }
+                    if world.rotates.get(entity).is_some()
+                    {
+                        ui.text("  Rotate");
+                    }
+                    if let Some(d) = world.dissolves.get(entity)
+                    {
+                        ui.text(format!("  Dissolve ({:.2})", d.amount));
+                    }
+                });
+        }
     }
 
     pub fn render(&mut self, encoder: &mut wgpu::CommandEncoder, view: &wgpu::TextureView)

src/editor/mod.rs

@@ -78,5 +78,6 @@ pub fn editor_loop(
     {
         camera_noclip_system(world, input_state, delta);
     }
-    editor.inspector.build_ui(stats);
+    let selected = editor.selected_entity;
+    editor.inspector.build_ui(stats, world, selected);
 }

src/loaders/mesh.rs

@@ -2,6 +2,26 @@ use bytemuck::{Pod, Zeroable};
 use glam::{Mat4, Quat, Vec3};
 use std::path::Path;
 
+fn compute_aabb(vertices: &[Vertex]) -> (Vec3, Vec3)
+{
+    let mut aabb_min = Vec3::splat(f32::MAX);
+    let mut aabb_max = Vec3::splat(f32::MIN);
+    for v in vertices
+    {
+        let p = Vec3::from(v.position);
+        aabb_min = aabb_min.min(p);
+        aabb_max = aabb_max.max(p);
+    }
+    if vertices.is_empty()
+    {
+        (Vec3::ZERO, Vec3::ZERO)
+    }
+    else
+    {
+        (aabb_min, aabb_max)
+    }
+}
+
 #[repr(C)]
 #[derive(Clone, Copy, Pod, Zeroable)]
 pub struct Vertex
@@ -113,6 +133,10 @@ pub struct Mesh
     pub vertex_buffer: wgpu::Buffer,
     pub index_buffer: wgpu::Buffer,
     pub num_indices: u32,
+    pub aabb_min: Vec3,
+    pub aabb_max: Vec3,
+    pub cpu_positions: Vec<[f32; 3]>,
+    pub cpu_indices: Vec<u32>,
 }
 
 impl Mesh
@@ -121,6 +145,8 @@ impl Mesh
     {
         use wgpu::util::DeviceExt;
 
+        let (aabb_min, aabb_max) = compute_aabb(vertices);
+
         let vertex_buffer = device.create_buffer_init(&wgpu::util::BufferInitDescriptor {
             label: Some("Vertex Buffer"),
             contents: bytemuck::cast_slice(vertices),
@@ -137,6 +163,10 @@ impl Mesh
             vertex_buffer,
             index_buffer,
             num_indices: indices.len() as u32,
+            aabb_min,
+            aabb_max,
+            cpu_positions: vertices.iter().map(|v| v.position).collect(),
+            cpu_indices: indices.to_vec(),
         }
     }
 

src/main.rs

@@ -5,6 +5,7 @@ mod editor;
 mod entity;
 mod loaders;
 mod physics;
+mod picking;
 mod postprocess;
 mod render;
 mod snow;
@@ -40,6 +41,8 @@ use crate::systems::{
     camera_follow_system, camera_input_system, camera_view_matrix, physics_sync_system,
     player_input_system, render_system, rotate_system, snow_system, spotlight_sync_system,
     start_camera_following, state_machine_physics_system, state_machine_system,
+    tree_dissolve_update_system, tree_instance_buffer_update_system, tree_occlusion_system,
+    trigger_system,
 };
 use crate::systems::camera::stop_camera_following;
 use crate::utility::time::Time;
@@ -165,12 +168,14 @@ fn main() -> Result<(), Box<dyn std::error::Error>>
                     editor.active = !editor.active;
                     if editor.active
                     {
+                        stop_camera_following(&mut world, camera_entity);
                         sdl_context.mouse().set_relative_mouse_mode(&window, false);
                         editor.right_mouse_held = false;
                         input_state.mouse_captured = false;
                     }
                     else
                     {
+                        start_camera_following(&mut world, camera_entity);
                         input_state.mouse_captured = true;
                         sdl_context.mouse().set_relative_mouse_mode(&window, true);
                     }
@@ -196,11 +201,38 @@ fn main() -> Result<(), Box<dyn std::error::Error>>
                 {
                     editor.right_mouse_held = false;
                     input_state.mouse_captured = false;
-                    start_camera_following(&mut world, camera_entity);
                     sdl_context.mouse().set_relative_mouse_mode(&window, false);
                     continue;
                 }
 
+                Event::MouseButtonDown {
+                    mouse_btn: MouseButton::Left,
+                    x,
+                    y,
+                    ..
+                } if editor.active && !editor.wants_mouse() =>
+                {
+                    if let Some(view) = crate::systems::camera_view_matrix(&world)
+                    {
+                        if let Some((_, cam)) = world.active_camera()
+                        {
+                            let projection = cam.projection_matrix();
+                            let (win_w, win_h) = window.size();
+                            let ray = crate::picking::Ray::from_screen_position(
+                                *x,
+                                *y,
+                                win_w,
+                                win_h,
+                                &view,
+                                &projection,
+                            );
+                            editor.selected_entity = crate::picking::pick_entity(&ray, &world);
+                            render::set_selected_entity(editor.selected_entity);
+                        }
+                    }
+                    continue;
+                }
+
                 _ =>
                 {}
             }
@@ -253,6 +285,7 @@ fn main() -> Result<(), Box<dyn std::error::Error>>
             PhysicsManager::physics_step();
 
             physics_sync_system(&mut world);
+            trigger_system(&mut world);
 
             physics_accumulator -= FIXED_TIMESTEP;
         }
@@ -263,6 +296,10 @@ fn main() -> Result<(), Box<dyn std::error::Error>>
 
         rotate_system(&mut world, delta);
 
+        tree_occlusion_system(&mut world);
+        tree_dissolve_update_system(&mut world, delta);
+        tree_instance_buffer_update_system(&mut world);
+
         let spotlights = spotlight_sync_system(&world);
         render::update_spotlights(spotlights);
 
@@ -303,8 +340,9 @@ fn main() -> Result<(), Box<dyn std::error::Error>>
 
                     if editor.active
                     {
-                        let screen_view =
+                        let screen_view = frame
-                            frame.texture.create_view(&wgpu::TextureViewDescriptor::default());
+                            .texture
+                            .create_view(&wgpu::TextureViewDescriptor::default());
                         let mut encoder = render::with_device(|d| {
                             d.create_command_encoder(&wgpu::CommandEncoderDescriptor {
                                 label: Some("ImGui Encoder"),

src/picking.rs

@@ -1,7 +1,10 @@
-use crate::camera::Camera;
-use crate::mesh::Mesh;
 use glam::{Mat4, Vec3, Vec4};
 
+use crate::components::TreeInstancesComponent;
+use crate::entity::EntityHandle;
+use crate::loaders::mesh::Mesh;
+use crate::world::World;
+
 pub struct Ray
 {
     pub origin: Vec3,
@@ -15,7 +18,8 @@ impl Ray
         screen_y: f32,
         screen_width: u32,
         screen_height: u32,
-        camera: &Camera,
+        view: &Mat4,
+        projection: &Mat4,
     ) -> Self
     {
         let ndc_x = (2.0 * screen_x) / screen_width as f32 - 1.0;
@@ -23,10 +27,8 @@ impl Ray
 
         let clip_coords = Vec4::new(ndc_x, ndc_y, -1.0, 1.0);
 
-        let view_matrix = camera.view_matrix();
+        let inv_projection = projection.inverse();
-        let projection_matrix = camera.projection_matrix();
+        let inv_view = view.inverse();
-        let inv_projection = projection_matrix.inverse();
-        let inv_view = view_matrix.inverse();
 
         let eye_coords = inv_projection * clip_coords;
         let eye_coords = Vec4::new(eye_coords.x, eye_coords.y, -1.0, 0.0);
@@ -34,39 +36,90 @@ impl Ray
         let world_coords = inv_view * eye_coords;
         let direction = Vec3::new(world_coords.x, world_coords.y, world_coords.z).normalize();
 
-        Ray {
+        let origin = inv_view.col(3).truncate();
-            origin: camera.position,
+
-            direction,
+        Ray { origin, direction }
-        }
     }
 
-    pub fn intersects_mesh(&self, mesh: &Mesh, transform: &Mat4) -> Option<f32>
+    pub fn intersects_aabb(&self, min: Vec3, max: Vec3) -> Option<f32>
     {
-        let inv_transform = transform.inverse();
+        let inv_dir = Vec3::new(
-        let local_origin = inv_transform.transform_point3(self.origin);
+            1.0 / self.direction.x,
-        let local_direction = inv_transform.transform_vector3(self.direction).normalize();
+            1.0 / self.direction.y,
+            1.0 / self.direction.z,
+        );
 
-        let mut closest_distance = f32::MAX;
+        let t1 = (min - self.origin) * inv_dir;
-        let mut hit = false;
+        let t2 = (max - self.origin) * inv_dir;
 
-        for triangle_idx in (0..mesh.num_indices).step_by(3)
+        let tmin = t1.min(t2);
-        {
+        let tmax = t1.max(t2);
-            let distance =
-                self.intersects_triangle_local(local_origin, local_direction, mesh, triangle_idx);
 
-            if let Some(d) = distance
+        let tenter = tmin.x.max(tmin.y).max(tmin.z);
+        let texit = tmax.x.min(tmax.y).min(tmax.z);
+
+        if tenter <= texit && texit >= 0.0
         {
-                if d < closest_distance
+            Some(tenter.max(0.0))
+        }
+        else
         {
-                    closest_distance = d;
+            None
-                    hit = true;
         }
     }
 }
 
-        if hit
+fn transform_aabb(aabb_min: Vec3, aabb_max: Vec3, model: &Mat4) -> (Vec3, Vec3)
 {
-            Some(closest_distance)
+    let corners = [
+        Vec3::new(aabb_min.x, aabb_min.y, aabb_min.z),
+        Vec3::new(aabb_max.x, aabb_min.y, aabb_min.z),
+        Vec3::new(aabb_min.x, aabb_max.y, aabb_min.z),
+        Vec3::new(aabb_max.x, aabb_max.y, aabb_min.z),
+        Vec3::new(aabb_min.x, aabb_min.y, aabb_max.z),
+        Vec3::new(aabb_max.x, aabb_min.y, aabb_max.z),
+        Vec3::new(aabb_min.x, aabb_max.y, aabb_max.z),
+        Vec3::new(aabb_max.x, aabb_max.y, aabb_max.z),
+    ];
+
+    let mut world_min = Vec3::splat(f32::MAX);
+    let mut world_max = Vec3::splat(f32::MIN);
+    for corner in &corners
+    {
+        let world_corner = model.transform_point3(*corner);
+        world_min = world_min.min(world_corner);
+        world_max = world_max.max(world_corner);
+    }
+    (world_min, world_max)
+}
+
+fn intersect_triangle(origin: Vec3, dir: Vec3, v0: Vec3, v1: Vec3, v2: Vec3) -> Option<f32>
+{
+    let edge1 = v1 - v0;
+    let edge2 = v2 - v0;
+    let h = dir.cross(edge2);
+    let a = edge1.dot(h);
+    if a.abs() < 1e-7
+    {
+        return None;
+    }
+    let f = 1.0 / a;
+    let s = origin - v0;
+    let u = f * s.dot(h);
+    if !(0.0..=1.0).contains(&u)
+    {
+        return None;
+    }
+    let q = s.cross(edge1);
+    let v = f * dir.dot(q);
+    if v < 0.0 || u + v > 1.0
+    {
+        return None;
+    }
+    let t = f * edge2.dot(q);
+    if t > 1e-7
+    {
+        Some(t)
     }
     else
     {
@@ -74,14 +127,124 @@ impl Ray
     }
 }
 
-    fn intersects_triangle_local(
+/// Ray–mesh triangle intersection in local space, returning world-space distance.
-        &self,
+///
-        local_origin: Vec3,
+/// Transforms the ray into local mesh space, tests every triangle with
-        local_direction: Vec3,
+/// Möller–Trumbore, then maps the closest local hit back to a world-space
-        _mesh: &Mesh,
+/// distance so results can be compared across entities.
-        _triangle_idx: u32,
+fn intersect_mesh_triangles(ray: &Ray, mesh: &Mesh, model: &Mat4) -> Option<f32>
-    ) -> Option<f32>
+{
+    if mesh.cpu_indices.is_empty()
+    {
+        return None;
+    }
+
+    let inv_model = model.inverse();
+    let local_origin = inv_model.transform_point3(ray.origin);
+    let local_dir = inv_model.transform_vector3(ray.direction);
+
+    let mut closest_t = f32::MAX;
+    let mut hit = false;
+
+    for tri in mesh.cpu_indices.chunks_exact(3)
+    {
+        let v0 = Vec3::from(mesh.cpu_positions[tri[0] as usize]);
+        let v1 = Vec3::from(mesh.cpu_positions[tri[1] as usize]);
+        let v2 = Vec3::from(mesh.cpu_positions[tri[2] as usize]);
+
+        if let Some(t) = intersect_triangle(local_origin, local_dir, v0, v1, v2)
+        {
+            if t < closest_t
+            {
+                closest_t = t;
+                hit = true;
+            }
+        }
+    }
+
+    if hit
+    {
+        let local_hit = local_origin + local_dir * closest_t;
+        let world_hit = model.transform_point3(local_hit);
+        Some((world_hit - ray.origin).length())
+    }
+    else
     {
         None
     }
 }
+
+fn intersect_instances(
+    ray: &Ray,
+    mesh: &Mesh,
+    tree_instances: &TreeInstancesComponent,
+) -> Option<f32>
+{
+    let mut closest: Option<f32> = None;
+
+    for instance in &tree_instances.instances
+    {
+        let instance_model = Mat4::from_scale_rotation_translation(
+            instance.scale,
+            instance.rotation,
+            instance.position,
+        );
+        let (world_min, world_max) = transform_aabb(mesh.aabb_min, mesh.aabb_max, &instance_model);
+
+        if let Some(d) = ray.intersects_aabb(world_min, world_max)
+        {
+            if closest.map_or(true, |c| d < c)
+            {
+                closest = Some(d);
+            }
+        }
+    }
+
+    closest
+}
+
+pub fn pick_entity(ray: &Ray, world: &World) -> Option<EntityHandle>
+{
+    let mut closest_entity = None;
+    let mut closest_distance = f32::MAX;
+
+    for (&entity, mesh_component) in &world.meshes.components
+    {
+        let transform = match world.transforms.get(entity)
+        {
+            Some(t) => t,
+            None => continue,
+        };
+
+        let model = transform.to_matrix();
+
+        let distance = if let Some(tree_instances) = world.tree_instances.get(entity)
+        {
+            intersect_instances(ray, &mesh_component.mesh, tree_instances)
+        }
+        else
+        {
+            let (world_min, world_max) = transform_aabb(
+                mesh_component.mesh.aabb_min,
+                mesh_component.mesh.aabb_max,
+                &model,
+            );
+            if ray.intersects_aabb(world_min, world_max).is_none()
+            {
+                continue;
+            }
+            intersect_mesh_triangles(ray, &mesh_component.mesh, &model)
+        };
+
+        if let Some(d) = distance
+        {
+            if d < closest_distance
+            {
+                closest_distance = d;
+                closest_entity = Some(entity);
+            }
+        }
+    }
+
+    closest_entity
+}

src/render/bind_group.rs

@@ -1,5 +1,7 @@
 use crate::texture::{DitherTextures, FlowmapTexture};
+use std::num::NonZeroU64;
 
+use super::types::Uniforms;
 use super::Renderer;
 
 impl Renderer
@@ -24,7 +26,11 @@ impl Renderer
             entries: &[
                 wgpu::BindGroupEntry {
                     binding: 0,
-                    resource: uniform_buffer.as_entire_binding(),
+                    resource: wgpu::BindingResource::Buffer(wgpu::BufferBinding {
+                        buffer: uniform_buffer,
+                        offset: 0,
+                        size: NonZeroU64::new(std::mem::size_of::<Uniforms>() as u64),
+                    }),
                 },
                 wgpu::BindGroupEntry {
                     binding: 1,

src/render/debug_overlay.rs

@@ -102,8 +102,7 @@ impl DebugOverlay
             cache: None,
         });
 
-        let pipeline_snow_light =
+        let pipeline_snow_light = device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
-            device.create_render_pipeline(&wgpu::RenderPipelineDescriptor {
             label: Some("Snow Light Debug Pipeline"),
             layout: Some(&snow_light_layout),
             vertex: wgpu::VertexState {

src/render/mod.rs

@@ -6,12 +6,19 @@ mod types;
 
 pub use types::{DrawCall, Pipeline, Spotlight, SpotlightRaw, Uniforms, MAX_SPOTLIGHTS};
 
+use crate::entity::EntityHandle;
+
 use crate::debug::DebugMode;
 use crate::postprocess::{create_blit_pipeline, create_fullscreen_quad, LowResFramebuffer};
 use crate::texture::{DitherTextures, FlowmapTexture};
-use pipeline::{create_debug_lines_pipeline, create_main_pipeline, create_snow_clipmap_pipeline,
+use pipeline::{
-               create_wireframe_pipeline};
+    create_debug_lines_pipeline, create_main_pipeline, create_snow_clipmap_pipeline,
+    create_wireframe_pipeline,
+};
 use std::cell::RefCell;
+use std::num::NonZeroU64;
+
+const MAX_DRAW_CALLS: usize = 64;
 
 pub struct Renderer
 {
@@ -62,6 +69,8 @@ pub struct Renderer
 
     snow_light_accumulation: Option<crate::snow_light::SnowLightAccumulation>,
     snow_light_bound: bool,
+
+    pub selected_entity: Option<EntityHandle>,
 }
 
 impl Renderer
@@ -90,8 +99,9 @@ impl Renderer
             .await
             .map_err(|_| "Failed to find adapter")?;
 
-        let wireframe_supported =
+        let wireframe_supported = adapter
-            adapter.features().contains(wgpu::Features::POLYGON_MODE_LINE);
+            .features()
+            .contains(wgpu::Features::POLYGON_MODE_LINE);
         let required_features = if wireframe_supported
         {
             wgpu::Features::POLYGON_MODE_LINE
@@ -129,7 +139,7 @@ impl Renderer
 
         let uniform_buffer = device.create_buffer(&wgpu::BufferDescriptor {
             label: Some("Uniform Buffer"),
-            size: std::mem::size_of::<Uniforms>() as wgpu::BufferAddress,
+            size: (std::mem::size_of::<Uniforms>() * MAX_DRAW_CALLS) as wgpu::BufferAddress,
             usage: wgpu::BufferUsages::UNIFORM | wgpu::BufferUsages::COPY_DST,
             mapped_at_creation: false,
         });
@@ -306,8 +316,8 @@ impl Renderer
                     visibility: wgpu::ShaderStages::VERTEX | wgpu::ShaderStages::FRAGMENT,
                     ty: wgpu::BindingType::Buffer {
                         ty: wgpu::BufferBindingType::Uniform,
-                        has_dynamic_offset: false,
+                        has_dynamic_offset: true,
-                        min_binding_size: None,
+                        min_binding_size: NonZeroU64::new(std::mem::size_of::<Uniforms>() as u64),
                     },
                     count: None,
                 },
@@ -463,15 +473,22 @@ impl Renderer
 
         let wireframe_pipeline = if wireframe_supported
         {
-            Some(create_wireframe_pipeline(&device, config.format, &bind_group_layout))
+            Some(create_wireframe_pipeline(
+                &device,
+                config.format,
+                &bind_group_layout,
+            ))
         }
         else
         {
             None
         };
 
-        let debug_lines_pipeline =
+        let debug_lines_pipeline = Some(create_debug_lines_pipeline(
-            Some(create_debug_lines_pipeline(&device, config.format, &bind_group_layout));
+            &device,
+            config.format,
+            &bind_group_layout,
+        ));
 
         let debug_overlay = Some(debug_overlay::DebugOverlay::new(&device, config.format));
 
@@ -533,6 +550,7 @@ impl Renderer
             dummy_snow_light_sampler,
             snow_light_accumulation: None,
             snow_light_bound: false,
+            selected_entity: None,
         })
     }
 
@@ -585,6 +603,9 @@ impl Renderer
                 label: Some("Render Encoder"),
             });
 
+        let uniform_size = std::mem::size_of::<Uniforms>() as u64;
+        let mut uniform_slot: u64 = 0;
+
         for (i, draw_call) in draw_calls.iter().enumerate()
         {
             let uniforms = Uniforms::new(
@@ -603,8 +624,15 @@ impl Renderer
                 &self.spotlights,
                 debug_mode.as_u32(),
             );
-            self.queue
+
-                .write_buffer(&self.uniform_buffer, 0, bytemuck::cast_slice(&[uniforms]));
+            let offset = uniform_slot * uniform_size;
+            uniform_slot += 1;
+
+            self.queue.write_buffer(
+                &self.uniform_buffer,
+                offset,
+                bytemuck::cast_slice(&[uniforms]),
+            );
 
             {
                 let mut render_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
@@ -660,7 +688,7 @@ impl Renderer
                         .unwrap_or(&self.standard_pipeline),
                 };
                 render_pass.set_pipeline(pipeline);
-                render_pass.set_bind_group(0, &self.bind_group, &[]);
+                render_pass.set_bind_group(0, &self.bind_group, &[offset as u32]);
 
                 if let Some(ref displacement_bind_group) = draw_call.displacement_bind_group
                 {
@@ -686,7 +714,10 @@ impl Renderer
             {
                 for draw_call in draw_calls.iter()
                 {
-                    if matches!(draw_call.pipeline, Pipeline::SnowClipmap | Pipeline::DebugLines)
+                    if matches!(
+                        draw_call.pipeline,
+                        Pipeline::SnowClipmap | Pipeline::DebugLines
+                    )
                     {
                         continue;
                     }
@@ -707,9 +738,11 @@ impl Renderer
                         &self.spotlights,
                         4,
                     );
+                    let wire_offset = uniform_slot * uniform_size;
+                    uniform_slot += 1;
                     self.queue.write_buffer(
                         &self.uniform_buffer,
-                        0,
+                        wire_offset,
                         bytemuck::cast_slice(&[uniforms]),
                     );
 
@@ -742,7 +775,7 @@ impl Renderer
                             });
 
                         wire_pass.set_pipeline(wireframe_pipeline);
-                        wire_pass.set_bind_group(0, &self.bind_group, &[]);
+                        wire_pass.set_bind_group(0, &self.bind_group, &[wire_offset as u32]);
                         wire_pass.set_vertex_buffer(0, draw_call.vertex_buffer.slice(..));
 
                         if let Some(ref instance_buffer) = draw_call.instance_buffer
@@ -764,6 +797,99 @@ impl Renderer
             }
         }
 
+        if let Some(selected) = self.selected_entity
+        {
+            if let Some(ref wireframe_pipeline) = self.wireframe_pipeline
+            {
+                for draw_call in draw_calls.iter()
+                {
+                    if draw_call.entity != Some(selected)
+                    {
+                        continue;
+                    }
+
+                    if matches!(
+                        draw_call.pipeline,
+                        Pipeline::SnowClipmap | Pipeline::DebugLines
+                    )
+                    {
+                        continue;
+                    }
+
+                    let uniforms = Uniforms::new(
+                        draw_call.model,
+                        *view,
+                        *projection,
+                        &light_view_projections,
+                        camera_position,
+                        player_position,
+                        self.terrain_height_scale,
+                        time,
+                        self.shadow_bias,
+                        draw_call.tile_scale,
+                        draw_call.enable_dissolve,
+                        draw_call.enable_snow_light,
+                        &self.spotlights,
+                        4,
+                    );
+                    let sel_offset = uniform_slot * uniform_size;
+                    uniform_slot += 1;
+                    self.queue.write_buffer(
+                        &self.uniform_buffer,
+                        sel_offset,
+                        bytemuck::cast_slice(&[uniforms]),
+                    );
+
+                    {
+                        let mut sel_pass = encoder.begin_render_pass(&wgpu::RenderPassDescriptor {
+                            label: Some("Selection Wireframe Pass"),
+                            color_attachments: &[Some(wgpu::RenderPassColorAttachment {
+                                view: &self.framebuffer.view,
+                                resolve_target: None,
+                                ops: wgpu::Operations {
+                                    load: wgpu::LoadOp::Load,
+                                    store: wgpu::StoreOp::Store,
+                                },
+                                depth_slice: None,
+                            })],
+                            depth_stencil_attachment: Some(
+                                wgpu::RenderPassDepthStencilAttachment {
+                                    view: &self.framebuffer.depth_view,
+                                    depth_ops: Some(wgpu::Operations {
+                                        load: wgpu::LoadOp::Load,
+                                        store: wgpu::StoreOp::Store,
+                                    }),
+                                    stencil_ops: None,
+                                },
+                            ),
+                            timestamp_writes: None,
+                            occlusion_query_set: None,
+                            multiview_mask: None,
+                        });
+
+                        sel_pass.set_pipeline(wireframe_pipeline);
+                        sel_pass.set_bind_group(0, &self.bind_group, &[sel_offset as u32]);
+                        sel_pass.set_vertex_buffer(0, draw_call.vertex_buffer.slice(..));
+
+                        if let Some(ref instance_buffer) = draw_call.instance_buffer
+                        {
+                            sel_pass.set_vertex_buffer(1, instance_buffer.slice(..));
+                        }
+
+                        sel_pass.set_index_buffer(
+                            draw_call.index_buffer.slice(..),
+                            wgpu::IndexFormat::Uint32,
+                        );
+                        sel_pass.draw_indexed(
+                            0..draw_call.num_indices,
+                            0,
+                            0..draw_call.num_instances,
+                        );
+                    }
+                }
+            }
+        }
+
         if debug_mode == DebugMode::ShadowMap
         {
             if let Some(ref overlay) = self.debug_overlay
@@ -1074,3 +1200,12 @@ pub fn update_spotlights(spotlights: Vec<Spotlight>)
         renderer.spotlights = spotlights;
     });
 }
+
+pub fn set_selected_entity(entity: Option<EntityHandle>)
+{
+    GLOBAL_RENDERER.with(|r| {
+        let mut renderer = r.borrow_mut();
+        let renderer = renderer.as_mut().expect("Renderer not set");
+        renderer.selected_entity = entity;
+    });
+}

src/render/types.rs

@@ -1,6 +1,8 @@
 use bytemuck::{Pod, Zeroable};
 use glam::Mat4;
 
+use crate::entity::EntityHandle;
+
 pub const MAX_SPOTLIGHTS: usize = 4;
 
 #[repr(C)]
@@ -156,4 +158,5 @@ pub struct DrawCall
     pub enable_dissolve: bool,
     pub enable_snow_light: bool,
     pub displacement_bind_group: Option<wgpu::BindGroup>,
+    pub entity: Option<EntityHandle>,
 }

src/shaders/main.wesl

@@ -32,46 +32,7 @@ fn vs_main(input: VertexInput) -> VertexOutput {
     );
     output.world_normal = normalize(normal_matrix * input.normal);
 
-    var dissolve_amount = 0.0;
+    output.dissolve_amount = input.instance_dissolve;
-
-    if uniforms.enable_dissolve == 1u {
-        let instance_position = vec3<f32>(
-            instance_model[3][0],
-            instance_model[3][1],
-            instance_model[3][2]
-        );
-
-        let to_player = uniforms.player_position - uniforms.camera_position;
-        let distance_to_player = length(to_player);
-
-        if distance_to_player > 0.01 {
-            let ray_dir = to_player / distance_to_player;
-            let ray_origin = uniforms.camera_position;
-
-            let tree_height = 16.0;
-            let occlusion_radius = 6.5;
-
-            let w = instance_position - ray_origin;
-            let projection_t = dot(w, ray_dir);
-
-            if projection_t > 0.0 && projection_t < distance_to_player {
-                let closest_on_ray = ray_origin + ray_dir * projection_t;
-
-                let diff = closest_on_ray - instance_position;
-                let height_on_trunk = clamp(diff.y, 0.0, tree_height);
-                let closest_on_trunk = instance_position + vec3<f32>(0.0, height_on_trunk, 0.0);
-
-                let perp_distance = length(closest_on_trunk - closest_on_ray);
-
-                if perp_distance < occlusion_radius {
-                    let dissolve_t = pow(perp_distance / occlusion_radius, 0.5);
-                    dissolve_amount = 1.0 - clamp(dissolve_t, 0.0, 1.0);
-                }
-            }
-        }
-    }
-
-    output.dissolve_amount = dissolve_amount;
     output.uv = input.uv;
 
     return output;
@@ -80,11 +41,10 @@ fn vs_main(input: VertexInput) -> VertexOutput {
 @fragment
 fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
     if uniforms.enable_dissolve == 1u && in.dissolve_amount > 0.0 {
-        let screen_pos = in.clip_position.xy;
+        let screen_pos = in.clip_position.xy / in.clip_position.w;
-        let noise_uv = fract(screen_pos / 128.0);
+        let noise_uv = screen_pos * 0.5 + 0.5;
-        let noise_value = textureSampleLevel(blue_noise_texture, blue_noise_sampler, noise_uv, 0.0).r;
+        let noise = textureSample(blue_noise_texture, blue_noise_sampler, noise_uv * 10.0).r;
-
+        if in.dissolve_amount > noise {
-        if noise_value < in.dissolve_amount {
             discard;
         }
     }

src/snow.rs

@@ -505,10 +505,23 @@ impl SnowLayer
             })
         });
 
+        let mut aabb_min = Vec3::splat(f32::MAX);
+        let mut aabb_max = Vec3::splat(f32::MIN);
+        for v in &vertices
+        {
+            let p = Vec3::from(v.position);
+            aabb_min = aabb_min.min(p);
+            aabb_max = aabb_max.max(p);
+        }
+
         Mesh {
             vertex_buffer,
             index_buffer,
             num_indices: indices.len() as u32,
+            aabb_min,
+            aabb_max,
+            cpu_positions: Vec::new(),
+            cpu_indices: Vec::new(),
         }
     }
 
@@ -568,6 +581,7 @@ impl SnowLayer
                 enable_dissolve: false,
                 enable_snow_light: true,
                 displacement_bind_group: Some(self.displacement_bind_group.clone()),
+                entity: None,
             })
             .collect()
     }

src/systems/mod.rs

@@ -9,6 +9,7 @@ pub mod snow;
 pub mod spotlight_sync;
 pub mod state_machine;
 pub mod tree_dissolve;
+pub mod trigger;
 
 pub use camera::{
     camera_follow_system, camera_input_system, camera_noclip_system, camera_view_matrix,
@@ -21,3 +22,7 @@ pub use rotate::rotate_system;
 pub use snow::snow_system;
 pub use spotlight_sync::spotlight_sync_system;
 pub use state_machine::{state_machine_physics_system, state_machine_system};
+pub use tree_dissolve::{
+    tree_dissolve_update_system, tree_instance_buffer_update_system, tree_occlusion_system,
+};
+pub use trigger::trigger_system;

src/systems/player_states.rs

@@ -90,7 +90,7 @@ impl State for PlayerFallingState
         };
 
         world.movements.with_mut(self.entity, |movement| {
-            movement.movement_config.movement_context.is_floored = is_grounded;
+            movement.movement_context.is_floored = is_grounded;
         });
     }
 }
@@ -116,7 +116,7 @@ impl State for PlayerIdleState
                 let current_velocity = *rigidbody.linvel();
                 let idle_damping = world
                     .movements
-                    .with(self.entity, |m| m.movement_config.idle_damping)
+                    .with(self.entity, |m| m.idle_damping)
                     .unwrap_or(0.1);
 
                 let horizontal_velocity = Vec3::new(current_velocity.x, 0.0, current_velocity.z);
@@ -171,7 +171,7 @@ impl State for PlayerIdleState
                 });
 
                 world.movements.with_mut(self.entity, |movement| {
-                    movement.movement_config.movement_context.is_floored = true;
+                    movement.movement_context.is_floored = true;
                 });
             }
         }
@@ -210,7 +210,7 @@ impl State for PlayerWalkingState
                     .inputs
                     .with(self.entity, |input| input.move_direction)
                     .unwrap_or(Vec3::ZERO);
-                (input, movement.movement_config.clone())
+                (input, movement.clone())
             })
             .unwrap();
 
@@ -301,7 +301,7 @@ impl State for PlayerWalkingState
         });
 
         world.movements.with_mut(self.entity, |movement| {
-            movement.movement_config.movement_context.is_floored = terrain_height.is_some();
+            movement.movement_context.is_floored = terrain_height.is_some();
         });
 
         if movement_input.length_squared() > 0.1
@@ -334,11 +334,11 @@ impl State for PlayerJumpingState
         let current_position = world.transforms.get(self.entity).unwrap().position;
 
         world.jumps.with_mut(self.entity, |jump| {
-            jump.jump_config.jump_context.in_progress = true;
+            jump.jump_context.in_progress = true;
-            jump.jump_config.jump_context.execution_time = self.enter_time_stamp;
+            jump.jump_context.execution_time = self.enter_time_stamp;
-            jump.jump_config.jump_context.origin_height = current_position.y;
+            jump.jump_context.origin_height = current_position.y;
-            jump.jump_config.jump_context.duration = 0.0;
+            jump.jump_context.duration = 0.0;
-            jump.jump_config.jump_context.normal = Vec3::Y;
+            jump.jump_context.normal = Vec3::Y;
         });
 
         println!("entered jumping");
@@ -347,8 +347,8 @@ impl State for PlayerJumpingState
     fn on_state_exit(&mut self, world: &mut World)
     {
         world.jumps.with_mut(self.entity, |jump| {
-            jump.jump_config.jump_context.in_progress = false;
+            jump.jump_context.in_progress = false;
-            jump.jump_config.jump_context.duration = 0.0;
+            jump.jump_context.duration = 0.0;
         });
 
         println!("exited jumping");
@@ -361,21 +361,21 @@ impl State for PlayerJumpingState
         let current_time = Time::get_time_elapsed();
 
         world.jumps.with_mut(self.entity, |jump| {
-            jump.jump_config.jump_context.duration =
+            jump.jump_context.duration =
-                current_time - jump.jump_config.jump_context.execution_time;
+                current_time - jump.jump_context.execution_time;
         });
 
-        let jump_config = world
+        let jump = world
             .jumps
-            .with_mut(self.entity, |jump| jump.jump_config.clone())
+            .with(self.entity, |jump| jump.clone())
             .unwrap();
 
-        let elapsed_time = jump_config.jump_context.duration;
+        let elapsed_time = jump.jump_context.duration;
-        let normalized_time = (elapsed_time / jump_config.jump_duration).min(1.0);
+        let normalized_time = (elapsed_time / jump.jump_duration).min(1.0);
-        let height_progress = jump_config.jump_curve.eval(normalized_time as f64).y as f32;
+        let height_progress = jump.jump_curve.eval(normalized_time as f64).y as f32;
 
-        let origin_height = jump_config.jump_context.origin_height;
+        let origin_height = jump.jump_context.origin_height;
-        let target_height = origin_height + height_progress * jump_config.jump_height;
+        let target_height = origin_height + height_progress * jump.jump_height;
 
         let current_translation = world
             .physics
@@ -409,7 +409,7 @@ impl State for PlayerJumpingState
         });
 
         world.movements.with_mut(self.entity, |movement| {
-            movement.movement_config.movement_context.is_floored = false;
+            movement.movement_context.is_floored = false;
         });
     }
 }

src/systems/render.rs

@@ -60,6 +60,7 @@ pub fn render_system(world: &World) -> Vec<DrawCall>
                 enable_dissolve: mesh_component.enable_dissolve,
                 enable_snow_light: mesh_component.enable_snow_light,
                 displacement_bind_group: None,
+                entity: Some(entity),
             })
         })
         .collect()

src/systems/tree_dissolve.rs

@@ -1,15 +1,21 @@
-use crate::components::DissolveComponent;
+use crate::loaders::mesh::InstanceRaw;
 use crate::world::World;
+use bytemuck::cast_slice;
 
 pub fn tree_dissolve_update_system(world: &mut World, delta: f32)
 {
-    for entity in world.dissolves.all()
+    for entity in world.tree_instances.all()
     {
-        if let Some(dissolve) = world.dissolves.get_mut(entity)
+        if let Some(tree_instances) = world.tree_instances.get_mut(entity)
         {
-            let diff = dissolve.target_amount - dissolve.amount;
+            for i in 0..tree_instances.dissolve_amounts.len()
-            dissolve.amount += diff * dissolve.transition_speed * delta;
+            {
-            dissolve.amount = dissolve.amount.clamp(0.0, 1.0);
+                let diff = tree_instances.dissolve_targets[i] - tree_instances.dissolve_amounts[i];
+                tree_instances.dissolve_amounts[i] +=
+                    diff * tree_instances.transition_speed * delta;
+                tree_instances.dissolve_amounts[i] =
+                    tree_instances.dissolve_amounts[i].clamp(0.0, 1.0);
+            }
         }
     }
 }
@@ -35,52 +41,70 @@ pub fn tree_occlusion_system(world: &mut World)
             }
 
             let to_player_normalized = to_player.normalize();
+            let occlusion_radius = 10.0;
 
-            for tree_entity in world.tree_tags.all()
+            for tree_entity in world.tree_instances.all()
             {
-                if let Some(tree_transform) = world.transforms.get(tree_entity)
+                if let Some(tree_instances) = world.tree_instances.get_mut(tree_entity)
                 {
-                    let tree_pos = tree_transform.position;
+                    for (idx, instance) in tree_instances.instances.iter().enumerate()
-                    let to_tree = tree_pos - camera_pos;
+                    {
-                    let distance_to_tree = to_tree.length();
+                        let instance_pos = instance.position;
+                        let to_instance = instance_pos - camera_pos;
+                        let distance_to_instance = to_instance.length();
 
-                    if distance_to_tree < distance_to_player
+                        if distance_to_instance < distance_to_player
                         {
-                        let projection = to_tree.dot(to_player_normalized);
+                            let projection = to_instance.dot(to_player_normalized);
 
-                        if projection > 0.0
+                            if projection > 0.0 && projection <= distance_to_player
                             {
-                            let perpendicular_vec = to_tree - to_player_normalized * projection;
+                                let perpendicular_vec =
+                                    to_instance - to_player_normalized * projection;
                                 let perp_distance = perpendicular_vec.length();
 
-                            let occlusion_radius = 2.5;
+                                if perp_distance <= occlusion_radius
-
-                            if perp_distance < occlusion_radius
                                 {
                                     let dissolve_amount =
                                         1.0 - (perp_distance / occlusion_radius).clamp(0.0, 1.0);
-
+                                    tree_instances.dissolve_targets[idx] = dissolve_amount;
-                                if let Some(dissolve) = world.dissolves.get_mut(tree_entity)
-                                {
-                                    dissolve.target_amount = dissolve_amount;
-                                }
-                                else
-                                {
-                                    let mut dissolve = DissolveComponent::new();
-                                    dissolve.target_amount = dissolve_amount;
-                                    world.dissolves.insert(tree_entity, dissolve);
-                                }
                                     continue;
                                 }
                             }
                         }
 
-                    if let Some(dissolve) = world.dissolves.get_mut(tree_entity)
+                        tree_instances.dissolve_targets[idx] = 0.0;
+                    }
+                }
+            }
+        }
+    }
+}
+
+pub fn tree_instance_buffer_update_system(world: &mut World)
 {
-                        dissolve.target_amount = 0.0;
+    for entity in world.tree_instances.all()
-                    }
+    {
-                }
+        if let Some(tree_instances) = world.tree_instances.get(entity)
-            }
+        {
+            let instance_data_vec: Vec<InstanceRaw> = tree_instances
+                .instances
+                .iter()
+                .enumerate()
+                .map(|(idx, instance)| InstanceRaw {
+                    model: instance.to_raw().model,
+                    dissolve_amount: tree_instances.dissolve_amounts[idx],
+                    _padding: [0.0; 3],
+                })
+                .collect();
+
+            crate::render::with_queue(|queue| {
+                queue.write_buffer(
+                    &tree_instances.instance_buffer,
+                    0,
+                    cast_slice(&instance_data_vec),
+                );
+            });
         }
     }
 }

src/systems/trigger.rs

@@ -0,0 +1,82 @@
+use glam::Vec3;
+
+use crate::components::trigger::{TriggerEvent, TriggerEventKind, TriggerFilter, TriggerShape, TriggerState};
+use crate::entity::EntityHandle;
+use crate::world::World;
+
+pub fn trigger_system(world: &mut World)
+{
+    world.trigger_events.clear();
+
+    let trigger_entities: Vec<EntityHandle> = world.triggers.all();
+    let mut pending_events: Vec<TriggerEvent> = Vec::new();
+
+    for trigger_entity in trigger_entities
+    {
+        let trigger_pos = match world.transforms.get(trigger_entity)
+        {
+            Some(t) => t.position,
+            None => continue,
+        };
+
+        let candidate_entities: Vec<EntityHandle> = match world.triggers.get(trigger_entity)
+        {
+            Some(trigger) => match &trigger.filter
+            {
+                TriggerFilter::Player => world.player_tags.all(),
+            },
+            None => continue,
+        };
+
+        let activator_positions: Vec<(EntityHandle, Vec3)> = candidate_entities
+            .into_iter()
+            .filter_map(|e| world.transforms.get(e).map(|t| (e, t.position)))
+            .collect();
+
+        let overlapping = match world.triggers.get(trigger_entity)
+        {
+            Some(trigger) => activator_positions.iter().any(|(_, pos)| match &trigger.shape
+            {
+                TriggerShape::Sphere { radius } => (trigger_pos - *pos).length() < *radius,
+            }),
+            None => continue,
+        };
+
+        let first_activator = activator_positions.first().map(|(e, _)| *e);
+
+        if let Some(trigger) = world.triggers.get_mut(trigger_entity)
+        {
+            match (&trigger.state, overlapping)
+            {
+                (TriggerState::Idle, true) =>
+                {
+                    trigger.state = TriggerState::Inside;
+                    if let Some(activator_entity) = first_activator
+                    {
+                        pending_events.push(TriggerEvent {
+                            trigger_entity,
+                            activator_entity,
+                            kind: TriggerEventKind::Entered,
+                        });
+                    }
+                }
+                (TriggerState::Inside, false) =>
+                {
+                    trigger.state = TriggerState::Idle;
+                    if let Some(activator_entity) = first_activator
+                    {
+                        pending_events.push(TriggerEvent {
+                            trigger_entity,
+                            activator_entity,
+                            kind: TriggerEventKind::Exited,
+                        });
+                    }
+                }
+                _ =>
+                {}
+            }
+        }
+    }
+
+    world.trigger_events.extend(pending_events);
+}

src/world.rs

@@ -2,11 +2,12 @@ use std::collections::HashMap;
 
 use crate::components::dissolve::DissolveComponent;
 use crate::components::follow::FollowComponent;
-use crate::components::jump::JumpComponent;
 use crate::components::lights::spot::SpotlightComponent;
+use crate::components::tree_instances::TreeInstancesComponent;
+use crate::components::trigger::{TriggerComponent, TriggerEvent};
 use crate::components::{
-    CameraComponent, InputComponent, MeshComponent, MovementComponent, PhysicsComponent,
+    CameraComponent, InputComponent, JumpComponent, MeshComponent, MovementComponent,
-    RotateComponent,
+    PhysicsComponent, RotateComponent,
 };
 use crate::entity::{EntityHandle, EntityManager};
 use crate::state::StateMachine;
@@ -84,6 +85,10 @@ pub struct World
     pub dissolves: Storage<DissolveComponent>,
     pub follows: Storage<FollowComponent>,
     pub rotates: Storage<RotateComponent>,
+    pub tree_instances: Storage<TreeInstancesComponent>,
+    pub names: Storage<String>,
+    pub triggers: Storage<TriggerComponent>,
+    pub trigger_events: Vec<TriggerEvent>,
 }
 
 impl World
@@ -106,6 +111,10 @@ impl World
             dissolves: Storage::new(),
             follows: Storage::new(),
             rotates: Storage::new(),
+            tree_instances: Storage::new(),
+            names: Storage::new(),
+            triggers: Storage::new(),
+            trigger_events: Vec::new(),
         }
     }
 
@@ -130,6 +139,9 @@ impl World
         self.dissolves.remove(entity);
         self.follows.remove(entity);
         self.rotates.remove(entity);
+        self.tree_instances.remove(entity);
+        self.names.remove(entity);
+        self.triggers.remove(entity);
         self.entities.despawn(entity);
     }