Reply To: [作业1]关于CPU和GPU同步问题

[DCXC]

框架封装的WebGLRenderer里面写得很清楚，是先draw light, 再Shadow pass,最后Camera pass。

render() {
        const gl = this.gl;

        gl.clearColor(0.0, 0.0, 0.0, 1.0); // Clear to black, fully opaque
        gl.clearDepth(1.0); // Clear everything
        gl.enable(gl.DEPTH_TEST); // Enable depth testing
        gl.depthFunc(gl.LEQUAL); // Near things obscure far things

        console.assert(this.lights.length != 0, "No light");
        console.assert(this.lights.length == 1, "Multiple lights");

        for (let l = 0; l < this.lights.length; l++) {
            // Draw light
            // TODO: Support all kinds of transform
            this.lights[l].meshRender.mesh.transform.translate = this.lights[l].entity.lightPos;
            this.lights[l].meshRender.draw(this.camera);

            // Shadow pass
            if (this.lights[l].entity.hasShadowMap == true) {
                for (let i = 0; i < this.shadowMeshes.length; i++) {
                    this.shadowMeshes[i].draw(this.camera);
                }
            }

            // Camera pass
            for (let i = 0; i < this.meshes.length; i++) {
                this.gl.useProgram(this.meshes[i].shader.program.glShaderProgram);
                this.gl.uniform3fv(this.meshes[i].shader.program.uniforms.uLightPos, this.lights[l].entity.lightPos);
                this.meshes[i].draw(this.camera);
            }
        }
    }