About different implementations of shader material

Help & Support
1

when I use depth map with my project，different implementations have different results.

  1. code
        this.shader = new pc.Shader(graphicsDevice, {
            attributes: {
                aPosition: pc.SEMANTIC_POSITION
            },
            vshader: [
                "attribute vec2 aPosition;",
                "",
                "varying vec2 vUv0;",
                "",
                "void main(void)",
                "{",
                "    gl_Position = vec4(aPosition, 0.0, 1.0);",
                "    vUv0 = aPosition.xy*0.5+0.5;",
                "}"
            ].join("\n"),
            fshader: [
                "precision " + graphicsDevice.precision + " float;",
                pc.shaderChunks.screenDepthPS,
                "",
                "varying vec2 vUv0;",
                "",
                "void main() {",
                "    float depth = getLinearScreenDepth(vUv0);",
                "    gl_FragColor = vec4(vec3(depth * 0.1), 1.0);",
                "}"
            ].join("\n")
        });

the result of this code is blank,and next
2.code

var psCode = "precision " + graphicsDevice.precision + " float;\n" +
                pc.shaderChunks.screenDepthPS +
                "\nvarying vec2 vUv0;\n"+
                "void main() {\n"+
                "    float depth = getLinearScreenDepth(vUv0);\n"+
                "    gl_FragColor = vec4(vec3(depth * 0.1), 1.0);\n"+
                "}";
        
        this.shader = pc.shaderChunks.createShaderFromCode(graphicsDevice, pc.shaderChunks.fullscreenQuadVS, psCode, "mypost");

the result of code is right,Why is there such a situation.Thinks.

2

maybe this PR can give you more information about this

3 Likes
3

thinks~