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ambient-occlusion-custom.html
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ambient-occlusion-custom.html
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<!DOCTYPE html>
<html>
<head>
<title>A-Frame - ambient occulusion</title>
<script src="js/aframe-master-v1.3.0.min.js"></script>
<script src="js/aframe-environment-component.js"></script>
</head>
<body>
<script>
AFRAME.registerComponent('ao-custom-material', {
schema:
{
diffuseMap: {type: "string"},
normalMap: {type: "string"},
},
init: function ()
{
this.material = 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[ "normalmap" ], // defines uniforms and sets defaults: sampler2D normalMap, vec2 normalScale
THREE.UniformsLib[ "fog" ], // values automatically sent by three.js
{
time: { value: 0 },
shininess: { value: 10 },
specular: { value: new THREE.Color("#111111") },
emissive: { value: new THREE.Color("#000000") },
thickness: { value: 0.15 }, // TODO: add shadow color too. * color
}
]),
lights: true,
fog: true,
vertexShader:
`
varying vec3 vViewPosition;
${THREE.ShaderChunk["common"]}
#define USE_UV
${THREE.ShaderChunk["uv_pars_vertex"]}
attribute vec3 color;
#define USE_COLOR
${THREE.ShaderChunk["color_pars_vertex"]}
${THREE.ShaderChunk["fog_pars_vertex"]}
${THREE.ShaderChunk["normal_pars_vertex"]}
// wallData: [N,E,S,W]. 0=absent, 1=present.
attribute vec4 wallData;
varying vec4 vWallData;
// cornerData: [NE, SE, SW, NW]. 0=absent, 1=present.
attribute vec4 cornerData;
varying vec4 vCornerData;
void main()
{
${THREE.ShaderChunk["uv_vertex"]}
${THREE.ShaderChunk["color_vertex"]}
${THREE.ShaderChunk["beginnormal_vertex"]}
${THREE.ShaderChunk["defaultnormal_vertex"]}
${THREE.ShaderChunk["normal_vertex"]}
${THREE.ShaderChunk["begin_vertex"]}
${THREE.ShaderChunk["project_vertex"]}
vViewPosition = - mvPosition.xyz;
${THREE.ShaderChunk["fog_vertex"]}
vWallData = wallData;
vCornerData = cornerData;
}
`,
fragmentShader: `
uniform vec3 diffuse;
uniform vec3 emissive;
uniform vec3 specular;
uniform float shininess;
uniform float opacity;
// wallData: [N,E,S,W]. 0=absent, 1=present.
varying vec4 vWallData;
// cornerData: [NE, SE, SW, NW]. 0=absent, 1=present.
varying vec4 vCornerData;
uniform float thickness;
${THREE.ShaderChunk["common"]}
${THREE.ShaderChunk["packing"]}
#define USE_COLOR
${THREE.ShaderChunk["color_pars_fragment"]}
#define USE_UV
${THREE.ShaderChunk["uv_pars_fragment"]}
#define USE_MAP
${THREE.ShaderChunk["map_pars_fragment"]}
${THREE.ShaderChunk["emissivemap_pars_fragment"]}
${THREE.ShaderChunk["fog_pars_fragment"]}
${THREE.ShaderChunk["bsdfs"]}
${THREE.ShaderChunk["lights_pars_begin"]}
${THREE.ShaderChunk["normal_pars_fragment"]}
${THREE.ShaderChunk["lights_phong_pars_fragment"]}
#define USE_NORMALMAP
#define TANGENTSPACE_NORMALMAP
${THREE.ShaderChunk["normalmap_pars_fragment"]}
${THREE.ShaderChunk["specularmap_pars_fragment"]}
void main()
{
vec4 diffuseColor = vec4( diffuse, opacity );
ReflectedLight reflectedLight = ReflectedLight( vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ), vec3( 0.0 ) );
vec3 totalEmissiveRadiance = emissive;
${THREE.ShaderChunk["map_fragment"]}
${THREE.ShaderChunk["color_fragment"]}
${THREE.ShaderChunk["specularmap_fragment"]}
${THREE.ShaderChunk["normal_fragment_begin"]}
${THREE.ShaderChunk["normal_fragment_maps"]}
${THREE.ShaderChunk["emissivemap_fragment"]}
// accumulation
${THREE.ShaderChunk["lights_phong_fragment"]}
${THREE.ShaderChunk["lights_fragment_begin"]}
${THREE.ShaderChunk["lights_fragment_maps"]}
${THREE.ShaderChunk["lights_fragment_end"]}
vec3 outgoingLight = reflectedLight.directDiffuse + reflectedLight.indirectDiffuse + reflectedLight.directSpecular + reflectedLight.indirectSpecular + totalEmissiveRadiance;
${THREE.ShaderChunk["output_fragment"]}
// north wall
if (vWallData.x > 0.5 && vUv.y > 1.0 - thickness)
gl_FragColor.rgb *= ((1.0 - vUv.y) / thickness);
// east wall
if (vWallData.y > 0.5 && vUv.x > 1.0 - thickness)
gl_FragColor.rgb *= ((1.0 - vUv.x) / thickness);
// south wall
if (vWallData.z > 0.5 && vUv.y < thickness)
gl_FragColor.rgb *= (vUv.y / thickness);
// west wall
if (vWallData.w > 0.5 && vUv.x < thickness)
gl_FragColor.rgb *= (vUv.x / thickness);
// NE corner
if (vCornerData.x > 0.5 && vUv.x > 1.0 - thickness && vUv.y > 1.0 - thickness)
gl_FragColor.rgb *= min( distance(vUv, vec2(1,1))/thickness, 1.0);
// SE corner
if (vCornerData.y > 0.5 && vUv.x > 1.0 - thickness && vUv.y < thickness)
gl_FragColor.rgb *= min( distance(vUv, vec2(1,0))/thickness, 1.0);
// SW corner
if (vCornerData.z > 0.5 && vUv.x < thickness && vUv.y < thickness)
gl_FragColor.rgb *= min( distance(vUv, vec2(0,0))/thickness, 1.0);
// NW corner
if (vCornerData.w > 0.5 && vUv.x < thickness && vUv.y > 1.0 - thickness)
gl_FragColor.rgb *= min( distance(vUv, vec2(0,1))/thickness, 1.0);
${THREE.ShaderChunk["fog_fragment"]}
}
`
}); // end of ShaderMaterial
let mapTexture = new THREE.Texture();
mapTexture.image = document.querySelector(this.data.diffuseMap);
mapTexture.needsUpdate = true;
this.material.uniforms.map.value = mapTexture;
let normalTexture = new THREE.Texture();
normalTexture.image = document.querySelector(this.data.normalMap);
normalTexture.needsUpdate = true;
this.material.uniforms.normalMap.value = normalTexture;
let self = this;
this.el.addEventListener("loaded", function(event) {
self.el.getObject3D('mesh').material = self.material;
});
},
});
AFRAME.registerComponent("ao-vertex-data", {
schema: {
},
init: function()
{
let geometry = this.el.object3D.children[0].geometry;
// vertex colors
let colorBuffer = new Float32Array( [1,0.5,0.5, 1,1,0.5, 0.5,1,0.5, 0.5,0.5,1] );
geometry.setAttribute( 'color', new THREE.BufferAttribute( colorBuffer, 3 ) );
// N E S W
// make four copies of wall data - all 4 vertices in quad need this data
let wallDataBuffer = new Float32Array( new Array(4).fill([0,0,1,1]).flat() );
geometry.setAttribute( 'wallData', new THREE.BufferAttribute( wallDataBuffer, 4 ) );
// NE SE SW NW
// make four copies of corner data - all 4 vertices in quad need this data
let cornerDataBuffer = new Float32Array( new Array(4).fill([1,0,0,0]).flat() );
geometry.setAttribute( 'cornerData', new THREE.BufferAttribute( cornerDataBuffer, 4 ) );
},
});
</script>
<a-scene xenvironment fog="type: linear; color: #222; near: 5; far: 20;">
<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-camera>
<a-entity
light="type: point;">
</a-entity>
</a-camera>
<!-- NOTE: must define lights for custom material to work -->
<!--
<a-entity
light="type: ambient; color: #666666;">
</a-entity>
<a-entity
light="type: directional; color: #FFFFFF;"
position="-1 4 0">
</a-entity>
-->
<a-sky
color = "#000337">
</a-sky>
<a-plane
width="100" height="100"
position=" 0.00 0.00 0.00"
rotation="-90 0 0"
material="src: #grid; repeat: 20 20; color: #CCCCCC;">
</a-plane>
<a-plane
id="wall"
position="0 1.5 -2"
ao-vertex-data
ao-custom-material="diffuseMap: #wallDiffuse; normalMap: #wallNormal;">
</a-plane>
</a-scene>
</body>
</html>