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shader-chunk-lambert.html
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shader-chunk-lambert.html
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<!DOCTYPE html>
<html>
<head>
<title>A-Frame - using shader chunk</title>
<script src="js/aframe-master-v1.3.0.min.js"></script>
<script src="js/aframe-environment-component.js"></script>
</head>
<body>
<script>
var customMaterial = new THREE.ShaderMaterial({
uniforms: THREE.UniformsUtils.merge([
THREE.UniformsLib[ "common" ], // defines uniforms and sets defaults: vec3 diffuse, float opacity, mat3 uvTransform, sampler2D map
THREE.UniformsLib[ "lights" ], // values automatically sent by three.js
THREE.UniformsLib[ "fog" ], // values automatically sent by three.js
{
time: { value: 0 },
// color: { value: new THREE.Color("#FFFFFF") },
// diffuseMap: { type: 't' }
}
]),
lights: true,
fog: true,
vertexShader:
`
// defines constants and functions
${THREE.ShaderChunk["common"]}
#define USE_UV
// defines vec2 vUv, mat3 uvTransform
${THREE.ShaderChunk["uv_pars_vertex"]}
// defines light-related things
${THREE.ShaderChunk["lights_pars_begin"]}
// defines varying float vFogDepth;
${THREE.ShaderChunk["fog_pars_vertex"]}
// values to pass along to fragment shader
varying vec3 vLightFront;
varying vec3 vIndirectFront;
void main()
{
// TODO: include vertexColors
// transforms uv coordinates and assigns to vUv
${THREE.ShaderChunk["uv_vertex"]}
// defines vec3 objectNormal
${THREE.ShaderChunk["beginnormal_vertex"]}
// defines vec3 transformedNormal
${THREE.ShaderChunk["defaultnormal_vertex"]}
// defines vec3 transformed = vec3(position)
${THREE.ShaderChunk["begin_vertex"]}
// defines vec3 mvPosition = vec3(position) // used by fog_vertex
// sets gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
${THREE.ShaderChunk["project_vertex"]}
// do light-related calculations
${THREE.ShaderChunk["lights_lambert_vertex"]}
// need this for the fog_vertex code -- ???
${THREE.ShaderChunk["fog_vertex"]}
}
`,
fragmentShader: `
${THREE.ShaderChunk["common"]}
#define USE_UV
// defines vec2 vUv
${THREE.ShaderChunk["uv_pars_fragment"]}
#define USE_MAP
// defines sampler2D map
${THREE.ShaderChunk["map_pars_fragment"]}
// defines light-related things
${THREE.ShaderChunk["lights_pars_begin"]}
// defines some light functions??
${THREE.ShaderChunk["bsdfs"]}
// defines uniform vec3 fogColor; varying float vFogDepth; uniform float fogDensity; uniform float fogNear; uniform float fogFar;
${THREE.ShaderChunk["fog_pars_fragment"]}
// values received from vertex shader
varying vec3 vLightFront;
varying vec3 vIndirectFront;
uniform vec3 diffuse;
uniform float opacity;
void main()
{
// starting point for Lambert-based shaders
vec4 diffuseColor = vec4( diffuse, opacity );
// apply (multiply) sampled texture to diffuseColor
${THREE.ShaderChunk["map_fragment"]}
// example of injecting custom code
// diffuseColor *= vec4(vUv.x, vUv.y, 0.0, 1.0);
// ShaderChunk["output_fragment"]: assigns gl_FragColor, requires outgoingLight
// doing it manually instead; simplifying light calculations
gl_FragColor = vec4(diffuseColor.rgb * (vLightFront * 1.0 + vIndirectFront / 2.0) / 3.14, diffuseColor.a);
// apply fog calculation to gl_FragColor
${THREE.ShaderChunk["fog_fragment"]}
}
`
});
AFRAME.registerComponent("ao-data", {
schema: {
},
init: function()
{
},
play: function()
{
let loader = new THREE.TextureLoader();
let tex = loader.load("images/color-grid.png");
// TODO: get this from a-assets instead of a three.loader
customMaterial.uniforms.map.value = tex;
this.el.object3D.children[0].material = customMaterial;
},
tick: function()
{
this.el.object3D.rotateX(0.010);
this.el.object3D.rotateY(0.007);
}
});
</script>
<a-scene fog="type: linear; color: #000011; near: 1; far: 10;">
<a-assets>
<img id="wallDiffuse" src="images/stone-wall-diffuse-256.jpg" />
<img id="wallNormal" src="images/stone-wall-normal-256.jpg" />
<img id="wallAO" src="images/ao-map.png" />
<img id="grid" src="images/color-grid.png" />
</a-assets>
<a-sky
color = "#000337">
</a-sky>
<!-- testing point light, attached to camera -->
<!--
<a-camera>
<a-entity
light="type: point;">
</a-entity>
</a-camera>
-->
<!-- testing other lights -->
<!--
<a-entity
light="type: ambient; color: #666666;">
</a-entity>
<a-entity
light="type: directional; color: #FFFFFF;"
position="-1 4 0">
</a-entity>
-->
<a-plane
id="floor"
width="100" height="100"
material="src: #grid; repeat: 20 20;"
rotation="-90 0 0">
</a-plane>
<a-box
id="test"
position="0 1.5 -2"
ao-data>
</a-box>
</a-scene>
</body>
</html>