feat(All):Initial

packages/sdk/lib/core/viewer/ViewerPathTracer.ts

@@ -0,0 +1,66 @@
+import * as THREE from 'three';
+import { WebGLPathTracer } from 'three-gpu-pathtracer';
+
+class ViewerPathTracer {
+	private readonly renderer: THREE.WebGLRenderer;
+	pathTracer:WebGLPathTracer | null = null;
+
+	constructor(renderer:THREE.WebGLRenderer) {
+		this.renderer = renderer;
+	}
+
+	init(scene:THREE.Scene, camera:THREE.Camera) {
+		if (this.pathTracer === null ) {
+			this.pathTracer = new WebGLPathTracer(this.renderer);
+			this.pathTracer.filterGlossyFactor = 0.5;
+		}
+
+		this.pathTracer.setScene(scene, camera);
+	}
+
+	setSize() {
+		if (this.pathTracer === null) return;
+
+		// 路径跟踪器大小会根据画布自动更新
+		this.pathTracer.updateCamera();
+	}
+
+	setBackground() {
+		if (this.pathTracer === null) return;
+
+		// 根据初始化的场景字段更新环境设置
+		this.pathTracer.updateEnvironment();
+	}
+
+	setEnvironment() {
+		if (this.pathTracer === null) return;
+
+		this.pathTracer.updateEnvironment();
+	}
+
+	updateMaterials() {
+		if (this.pathTracer === null) return;
+
+		this.pathTracer.updateMaterials();
+	}
+
+	update() {
+		if (this.pathTracer === null) return;
+
+		this.pathTracer.renderSample();
+	}
+
+	reset() {
+		if (this.pathTracer === null) return;
+
+		this.pathTracer.updateCamera();
+	}
+
+	getSamples() {
+		if (this.pathTracer === null) return;
+
+		return this.pathTracer.samples;
+	}
+}
+
+export { ViewerPathTracer };