添加缓冲区工具函数和优化几何体处理

src/buffer-util.ts

@@ -0,0 +1,30 @@
+export class BufferUtil {
+
+    public static createVertexBuffer(device: GPUDevice, data: Float32Array ): GPUBuffer {
+        
+        const buffer = device.createBuffer({
+          size: data.byteLength,
+          usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.VERTEX,
+          mappedAtCreation: true,
+        });
+
+        new Float32Array(buffer.getMappedRange()).set(data);
+        buffer.unmap();
+
+        return buffer;
+    }
+
+    public static createIndexBuffer(device: GPUDevice, data: Uint16Array): GPUBuffer {
+        
+        const buffer = device.createBuffer({
+          size: data.byteLength,          
+          usage: GPUBufferUsage.COPY_DST | GPUBufferUsage.INDEX,
+          mappedAtCreation: true,
+        });
+
+        new Uint16Array(buffer.getMappedRange()).set(data);
+        buffer.unmap();
+
+        return buffer;
+    }
+}