Update project

Source/Render/DrawModel.rs

@@ -0,0 +1,66 @@
+use super::{Material, Mesh, Model};
+use std::ops::Range;
+
+pub trait DrawModel<'a> {
+    fn DrawMesh(
+        &mut self,
+        mesh: &'a Mesh,
+        material: &'a Material,
+        camera_bind_group: &'a wgpu::BindGroup,
+    );
+    fn DrawMeshInstanced(
+        &mut self,
+        mesh: &'a Mesh,
+        material: &'a Material,
+        instances: Range<u32>,
+        camera_bind_group: &'a wgpu::BindGroup,
+    );
+    fn DrawModel(&mut self, model: &'a Model, camera_bind_group: &'a wgpu::BindGroup);
+    fn DrawModelInstanced(
+        &mut self,
+        model: &'a Model,
+        instances: Range<u32>,
+        camera_bind_group: &'a wgpu::BindGroup,
+    );
+}
+
+impl<'a> DrawModel<'a> for wgpu::RenderPass<'a> {
+    fn DrawMesh(
+        &mut self,
+        mesh: &'a Mesh,
+        material: &'a Material,
+        camera_bind_group: &'a wgpu::BindGroup,
+    ) {
+        self.DrawMeshInstanced(mesh, material, 0..1, camera_bind_group);
+    }
+
+    fn DrawMeshInstanced(
+        &mut self,
+        mesh: &'a Mesh,
+        material: &'a Material,
+        instances: Range<u32>,
+        camera_bind_group: &'a wgpu::BindGroup,
+    ) {
+        self.set_vertex_buffer(0, mesh.vertex_buffer.slice(..));
+        self.set_index_buffer(mesh.index_buffer.slice(..), wgpu::IndexFormat::Uint32);
+        self.set_bind_group(0, &material.bind_group, &[]);
+        self.set_bind_group(1, camera_bind_group, &[]);
+        self.draw_indexed(0..mesh.num_elements, 0, instances);
+    }
+
+    fn DrawModel(&mut self, model: &'a Model, camera_bind_group: &'a wgpu::BindGroup) {
+        self.DrawModelInstanced(model, 0..1, camera_bind_group);
+    }
+
+    fn DrawModelInstanced(
+        &mut self,
+        model: &'a Model,
+        instances: Range<u32>,
+        camera_bind_group: &'a wgpu::BindGroup,
+    ) {
+        for mesh in &model.meshes {
+            let material = &model.materials[mesh.material];
+            self.DrawMeshInstanced(mesh, material, instances.clone(), camera_bind_group);
+        }
+    }
+}