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dissolve-shader.html
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dissolve-shader.html
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<!DOCTYPE html>
<html>
<head>
<title>A-Frame - custom shaders</title>
<meta name="description" content="A-Frame - custom shaders">
<script src="js/aframe-master-v1.3.0.min.js"></script>
<script src="js/aframe-environment-component.js"></script>
<script src="js/controller-listener.js"></script>
<script src="js/player-move.js"></script>
<script src="js/raycaster-extras.js"></script>
</head>
<body>
<script>
let noiseCode = `
//
// GLSL textureless classic 3D noise "cnoise",
// with an RSL-style periodic variant "pnoise".
// Author: Stefan Gustavson ([email protected])
// Version: 2011-10-11
//
// Many thanks to Ian McEwan of Ashima Arts for the
// ideas for permutation and gradient selection.
//
// Copyright (c) 2011 Stefan Gustavson. All rights reserved.
// Distributed under the MIT license. See LICENSE file.
// https://github.com/stegu/webgl-noise
//
vec3 mod289(vec3 x)
{
return x - floor(x * (1.0 / 289.0)) * 289.0;
}
vec4 mod289(vec4 x)
{
return x - floor(x * (1.0 / 289.0)) * 289.0;
}
vec4 permute(vec4 x)
{
return mod289(((x*34.0)+10.0)*x);
}
vec4 taylorInvSqrt(vec4 r)
{
return 1.79284291400159 - 0.85373472095314 * r;
}
vec3 fade(vec3 t) {
return t*t*t*(t*(t*6.0-15.0)+10.0);
}
// Classic Perlin noise
float cnoise(vec3 P)
{
vec3 Pi0 = floor(P); // Integer part for indexing
vec3 Pi1 = Pi0 + vec3(1.0); // Integer part + 1
Pi0 = mod289(Pi0);
Pi1 = mod289(Pi1);
vec3 Pf0 = fract(P); // Fractional part for interpolation
vec3 Pf1 = Pf0 - vec3(1.0); // Fractional part - 1.0
vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
vec4 iy = vec4(Pi0.yy, Pi1.yy);
vec4 iz0 = Pi0.zzzz;
vec4 iz1 = Pi1.zzzz;
vec4 ixy = permute(permute(ix) + iy);
vec4 ixy0 = permute(ixy + iz0);
vec4 ixy1 = permute(ixy + iz1);
vec4 gx0 = ixy0 * (1.0 / 7.0);
vec4 gy0 = fract(floor(gx0) * (1.0 / 7.0)) - 0.5;
gx0 = fract(gx0);
vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);
vec4 sz0 = step(gz0, vec4(0.0));
gx0 -= sz0 * (step(0.0, gx0) - 0.5);
gy0 -= sz0 * (step(0.0, gy0) - 0.5);
vec4 gx1 = ixy1 * (1.0 / 7.0);
vec4 gy1 = fract(floor(gx1) * (1.0 / 7.0)) - 0.5;
gx1 = fract(gx1);
vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);
vec4 sz1 = step(gz1, vec4(0.0));
gx1 -= sz1 * (step(0.0, gx1) - 0.5);
gy1 -= sz1 * (step(0.0, gy1) - 0.5);
vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);
vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);
vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);
vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);
vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);
vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);
vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);
vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);
vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
g000 *= norm0.x;
g010 *= norm0.y;
g100 *= norm0.z;
g110 *= norm0.w;
vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
g001 *= norm1.x;
g011 *= norm1.y;
g101 *= norm1.z;
g111 *= norm1.w;
float n000 = dot(g000, Pf0);
float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));
float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));
float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));
float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));
float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));
float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));
float n111 = dot(g111, Pf1);
vec3 fade_xyz = fade(Pf0);
vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);
vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);
float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x);
return 2.2 * n_xyz;
}
// Classic Perlin noise, periodic variant
float pnoise(vec3 P, vec3 rep)
{
vec3 Pi0 = mod(floor(P), rep); // Integer part, modulo period
vec3 Pi1 = mod(Pi0 + vec3(1.0), rep); // Integer part + 1, mod period
Pi0 = mod289(Pi0);
Pi1 = mod289(Pi1);
vec3 Pf0 = fract(P); // Fractional part for interpolation
vec3 Pf1 = Pf0 - vec3(1.0); // Fractional part - 1.0
vec4 ix = vec4(Pi0.x, Pi1.x, Pi0.x, Pi1.x);
vec4 iy = vec4(Pi0.yy, Pi1.yy);
vec4 iz0 = Pi0.zzzz;
vec4 iz1 = Pi1.zzzz;
vec4 ixy = permute(permute(ix) + iy);
vec4 ixy0 = permute(ixy + iz0);
vec4 ixy1 = permute(ixy + iz1);
vec4 gx0 = ixy0 * (1.0 / 7.0);
vec4 gy0 = fract(floor(gx0) * (1.0 / 7.0)) - 0.5;
gx0 = fract(gx0);
vec4 gz0 = vec4(0.5) - abs(gx0) - abs(gy0);
vec4 sz0 = step(gz0, vec4(0.0));
gx0 -= sz0 * (step(0.0, gx0) - 0.5);
gy0 -= sz0 * (step(0.0, gy0) - 0.5);
vec4 gx1 = ixy1 * (1.0 / 7.0);
vec4 gy1 = fract(floor(gx1) * (1.0 / 7.0)) - 0.5;
gx1 = fract(gx1);
vec4 gz1 = vec4(0.5) - abs(gx1) - abs(gy1);
vec4 sz1 = step(gz1, vec4(0.0));
gx1 -= sz1 * (step(0.0, gx1) - 0.5);
gy1 -= sz1 * (step(0.0, gy1) - 0.5);
vec3 g000 = vec3(gx0.x,gy0.x,gz0.x);
vec3 g100 = vec3(gx0.y,gy0.y,gz0.y);
vec3 g010 = vec3(gx0.z,gy0.z,gz0.z);
vec3 g110 = vec3(gx0.w,gy0.w,gz0.w);
vec3 g001 = vec3(gx1.x,gy1.x,gz1.x);
vec3 g101 = vec3(gx1.y,gy1.y,gz1.y);
vec3 g011 = vec3(gx1.z,gy1.z,gz1.z);
vec3 g111 = vec3(gx1.w,gy1.w,gz1.w);
vec4 norm0 = taylorInvSqrt(vec4(dot(g000, g000), dot(g010, g010), dot(g100, g100), dot(g110, g110)));
g000 *= norm0.x;
g010 *= norm0.y;
g100 *= norm0.z;
g110 *= norm0.w;
vec4 norm1 = taylorInvSqrt(vec4(dot(g001, g001), dot(g011, g011), dot(g101, g101), dot(g111, g111)));
g001 *= norm1.x;
g011 *= norm1.y;
g101 *= norm1.z;
g111 *= norm1.w;
float n000 = dot(g000, Pf0);
float n100 = dot(g100, vec3(Pf1.x, Pf0.yz));
float n010 = dot(g010, vec3(Pf0.x, Pf1.y, Pf0.z));
float n110 = dot(g110, vec3(Pf1.xy, Pf0.z));
float n001 = dot(g001, vec3(Pf0.xy, Pf1.z));
float n101 = dot(g101, vec3(Pf1.x, Pf0.y, Pf1.z));
float n011 = dot(g011, vec3(Pf0.x, Pf1.yz));
float n111 = dot(g111, Pf1);
vec3 fade_xyz = fade(Pf0);
vec4 n_z = mix(vec4(n000, n100, n010, n110), vec4(n001, n101, n011, n111), fade_xyz.z);
vec2 n_yz = mix(n_z.xy, n_z.zw, fade_xyz.y);
float n_xyz = mix(n_yz.x, n_yz.y, fade_xyz.x);
return 2.2 * n_xyz;
}
`;
AFRAME.registerShader('dissolve', {
schema:
{
color: {type: 'color', is: 'uniform'},
borderColor: {type: 'color', is: 'uniform', default: "black"},
timeMsec: {type: 'time', is: 'uniform'},
tex: {type: 'map', is: 'uniform'},
noiseLevel: {type: 'float', is: 'uniform', default: 8.0},
timeScale: {type: 'float', is: 'uniform', default: 0.5},
},
vertexShader: `
varying vec2 vUv;
varying vec3 pos;
void main()
{
vUv = uv;
gl_Position = projectionMatrix * modelViewMatrix * vec4( position, 1.0 );
pos = position;
}
`,
fragmentShader: noiseCode + `
varying vec2 vUv;
varying vec3 pos;
uniform vec3 color;
uniform sampler2D tex;
uniform float noiseLevel;
uniform vec3 borderColor;
uniform float timeScale;
uniform float timeMsec; // A-Frame time in milliseconds.
void main()
{
float time = timeMsec / 1000.0;
float v = cnoise(noiseLevel * pos);
// range of cnoise appears to be -1.0 to 1.1 (???)
float bound = 1.2 * sin(time * timeScale);
if (v < bound)
discard;
else if (v < bound + 0.1)
gl_FragColor = vec4(borderColor, 1);
else
gl_FragColor = texture2D(tex, vUv);
gl_FragColor *= vec4(color, 1);
}
`,
});
</script>
<a-scene environment>
<a-assets>
<img id="colorgrid" src="images/color-grid.png"/>
<img id="gradient" src="images/gradient-fade.png" />
</a-assets>
<a-sky color = "#000337"></a-sky>
<a-entity
id="player"
position="0 0 0"
player-move="controllerListenerId: #controller-data;
navigationMeshClass: environmentGround;">
<a-camera></a-camera>
<a-entity
id="controller-data"
controller-listener="leftControllerId: #left-controller;
rightControllerId: #right-controller;">
</a-entity>
<a-entity
id="left-controller"
oculus-touch-controls="hand: left">
</a-entity>
<a-entity
id="right-controller"
oculus-touch-controls="hand: right"
raycaster="objects: .raycaster-target, .environmentGround;"
raycaster-extras="controllerListenerId: #controller-data;
beamImageSrc: #gradient; beamLength: 0.5;">
</a-entity>
</a-entity>
<a-torus-knot
p="2" q="3" radius="0.5" radius-tubular="0.1"
position = "-2.5 1.5 -4"
material = "shader: dissolve; tex: #colorgrid; color: #FF4444; borderColor: red; noiseLevel: 20; timeScale: 0.2;
transparent: true; side: double;">
</a-torus-knot>
<a-box
width = "2" height = "1" depth = "1"
position = "-1 0.5 -3"
rotation = "0 45 0"
material = "shader: dissolve; tex: #colorgrid; color: orange; noiseLevel: 2; timeScale: 0.4;
transparent: true; side: double;">
</a-box>
<a-sphere
radius = "1.25"
position = "0 1.25 -5"
segments-width="144"
segments-height="72"
material = "shader: dissolve; tex: #colorgrid; color: yellow; timeScale: 0.9;
transparent: true; side: double;">
</a-sphere>
<a-cylinder
radius = "0.5" height = "1.5"
position = " 1 0.75 -3"
material = "shader: dissolve; tex: #colorgrid; color: #008800; timeScale: 1.2;
transparent: true; side: double;">
</a-cylinder>
<a-cone
radius-bottom = "1" radius-top = "0" height = "2"
position = "3 1 -4"
material = "shader: dissolve; tex: #colorgrid; color: blue; borderColor: cyan; timeScale: 1.8;
transparent: true; side: double;">
</a-cone>
<a-torus
radius="0.5" radius-tubular="0.1"
position = "2 3 -4"
rotation = "30 -20 0"
material = "shader: dissolve; tex: #colorgrid; color: white; borderColor: purple; timeScale: 0.5;
transparent: true; side: double;">
</a-torus>
</a-scene>
</body>
</html>