MAJOR rendering overhaul. Snow deformation, persistent light, flowmap out. Also ECS architexture overhaul

src/loaders/heightmap.rs

@@ -0,0 +1,67 @@
+use exr::prelude::{ReadChannels, ReadLayers};
+use std::path::Path;
+
+pub fn load_exr_heightmap(
+    device: &wgpu::Device,
+    queue: &wgpu::Queue,
+    path: impl AsRef<Path>,
+) -> Result<(wgpu::Texture, wgpu::TextureView, wgpu::Sampler), Box<dyn std::error::Error>>
+{
+    let image = exr::prelude::read()
+        .no_deep_data()
+        .largest_resolution_level()
+        .all_channels()
+        .all_layers()
+        .all_attributes()
+        .from_file(path)?;
+
+    let layer = &image.layer_data[0];
+    let width = layer.size.width() as u32;
+    let height = layer.size.height() as u32;
+
+    let channel = &layer.channel_data.list[0];
+    let float_data: Vec<f32> = channel.sample_data.values_as_f32().collect();
+
+    let texture_size = wgpu::Extent3d {
+        width,
+        height,
+        depth_or_array_layers: 1,
+    };
+
+    let texture = device.create_texture(&wgpu::TextureDescriptor {
+        label: Some("Height Map Texture"),
+        size: texture_size,
+        mip_level_count: 1,
+        sample_count: 1,
+        dimension: wgpu::TextureDimension::D2,
+        format: wgpu::TextureFormat::R32Float,
+        usage: wgpu::TextureUsages::TEXTURE_BINDING | wgpu::TextureUsages::COPY_DST,
+        view_formats: &[],
+    });
+
+    queue.write_texture(
+        texture.as_image_copy(),
+        bytemuck::cast_slice(&float_data),
+        wgpu::TexelCopyBufferLayout {
+            offset: 0,
+            bytes_per_row: Some(4 * width),
+            rows_per_image: Some(height),
+        },
+        texture_size,
+    );
+
+    let view = texture.create_view(&wgpu::TextureViewDescriptor::default());
+
+    let sampler = device.create_sampler(&wgpu::SamplerDescriptor {
+        label: Some("Height Map Sampler"),
+        address_mode_u: wgpu::AddressMode::ClampToEdge,
+        address_mode_v: wgpu::AddressMode::ClampToEdge,
+        address_mode_w: wgpu::AddressMode::ClampToEdge,
+        mag_filter: wgpu::FilterMode::Nearest,
+        min_filter: wgpu::FilterMode::Nearest,
+        mipmap_filter: wgpu::FilterMode::Nearest,
+        ..Default::default()
+    });
+
+    Ok((texture, view, sampler))
+}