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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>MathBox - RTT Feedback History</title>
<script
type="text/javascript"
src="https://cdn.jsdelivr.net/npm/three@0.137.0/build/three.min.js"
></script>
<!--
- a minified version mathbox.min.js is also available;
- recommend using a specific version (not @latest) in public sites
-->
<script
type="text/javascript"
src="https://cdn.jsdelivr.net/npm/mathbox@latest/build/bundle/mathbox.js"
></script>
<link
rel="stylesheet"
href="https://cdn.jsdelivr.net/npm/mathbox@latest/build/mathbox.css"
/>
<meta name="viewport" content="initial-scale=1, maximum-scale=1" />
</head>
<script type="application/glsl" id="map-color">
uniform float modulate1;
uniform float modulate2;
vec4 getSample(vec3 xyz);
vec4 getFramesSample(vec3 xyz) {
vec4 color = (
getSample(xyz) +
getSample(xyz + vec3(0.0, 0.0, 1.0)) +
getSample(xyz + vec3(0.0, 0.0, 2.0)) +
getSample(xyz + vec3(0.0, 0.0, 3.0))
) / 4.0;
color = color * color * color * 1.15;
float v = color.x + color.y + color.z;
vec3 c = vec3(v*v + color.x * .2, v*v, v*v*v + color.z) * .333;
c = mix(c, mix(sqrt(c.yzx * c), c.zxy, modulate1), modulate2);
c = mix(c, mix(c.yzx, c.zxy, modulate1), modulate2);
return vec4(c, 1.0);
}
</script>
<body>
<script>
mathbox = MathBox.mathBox({
plugins: ["core"],
});
three = mathbox.three;
three.renderer.setClearColor(new THREE.Color(0x000000), 1.0);
mathbox
.set({
scale: 720,
})
.rtt({
id: "render",
minFilter: "nearest",
magFilter: "nearest",
type: "unsignedByte",
})
.camera(
{
lookAt: [0, 0, 0],
},
{
position: function (t) {
return [Math.cos(t) * 3, 0, Math.sin(t) * 3];
},
}
)
.cartesian({
range: [
[-2, 2],
[-1, 1],
[-1, 1],
],
scale: [2, 1, 1],
})
.transform({
scale: [0.7, 0.7, 0.7],
})
.grid({
width: 5,
divideX: 2,
divideY: 2,
zBias: 10,
opacity: 0.25,
color: 0xffdfe0,
})
.end()
.end()
.end()
.rtt({
id: "rtt1",
history: 4,
type: "unsignedByte",
minFilter: "linear",
magFilter: "linear",
})
.shader(
{
code: [
"uniform vec3 dataResolution;",
"uniform vec3 dataSize;",
"uniform float cosine;",
"uniform float sine;",
"vec4 getSample(vec3 xyz);",
"vec4 getFramesSample(vec3 xyz) {",
" vec2 pos = xyz.xy * dataResolution.xy - .5;",
" pos = ((pos * dataSize.xy) * mat2(cosine, sine, -sine, cosine) * .999) / dataSize.xy;",
" xyz.xy = (pos + .5) * dataSize.xy;",
" vec4 c = getSample(xyz + vec3( 0.0, 0.0, 1.0));",
" vec3 t = getSample(xyz + vec3( 0.0, 1.5, 0.0)).xyz;",
" vec3 b = getSample(xyz + vec3( 0.0,-1.5, 0.0)).xyz;",
" vec3 l = getSample(xyz + vec3(-1.5, 0.0, 0.0)).xyz;",
" vec3 r = getSample(xyz + vec3( 1.5, 0.0, 0.0)).xyz;",
" return vec4((t + b + l + r) / 2.0 - c.xyz, c.w);",
"}",
].join("\n"),
},
{
cosine: function (t) {
return Math.cos(Math.sin(t * 0.2) * 0.005);
},
sine: function (t) {
return Math.sin(Math.sin(t * 0.2) * 0.005);
},
}
)
.resample({
id: "resample1",
indices: 3,
channels: 4,
})
/**/
.compose()
.compose({
source: "#render",
blending: THREE.AdditiveBlending,
})
.end()
.rtt({
minFilter: "linear",
magFilter: "linear",
type: "unsignedByte",
})
.shader(
{
id: "colormap",
code: [
"uniform float modulate1;",
"uniform float modulate2;",
"uniform float modulate3;",
"uniform float modulate4;",
"vec4 getSample(vec3 xyz);",
"vec4 getFramesSample(vec3 xyz) {",
" vec4 color = (",
" getSample(xyz) +",
" getSample(xyz + vec3(0.0, 0.0, 1.0)) +",
" getSample(xyz + vec3(0.0, 0.0, 2.0)) +",
" getSample(xyz + vec3(0.0, 0.0, 3.0))",
" ) / 4.0;",
" color = color * color * color * 1.15;",
" float v = color.x + color.y + color.z;",
" vec3 c = vec3(v*v + color.x * .2, v*v, v*v*v + color.z) * .333;",
" c = mix(c, mix(sqrt(c.yzx * c), c.zxy, modulate1), modulate2);",
" c = mix(c, mix(c.yzx, c.zxy, modulate1), modulate2);",
" c = mix(c, mix(abs(sin(c.yxz * 2.0)), c.zyx, modulate3), modulate4);",
" return vec4(c, 1.0);",
"}",
].join("\n"),
},
{
modulate1: function (t) {
return Math.cos(t * 0.417) * 0.5 + 0.5;
},
modulate2: function (t) {
return Math.cos(t * 0.617 + Math.sin(t * 0.133)) * 0.5 + 0.5;
},
modulate3: function (t) {
return Math.cos(t * 0.217 + 2.0) * 0.5 + 0.5;
},
modulate4: function (t) {
return (
Math.cos(t * 0.117 + 3.0 + Math.sin(t * 0.133)) * 0.5 + 0.5
);
},
}
)
.resample({
id: "resample2",
source: "#rtt1",
indices: 3,
channels: 4,
})
.compose()
.end()
.shader({
code: [
"vec4 getSample(vec2 xy);",
"vec4 getFramesSample(vec2 xy) {",
" return getSample(xy + vec2(0.5, 0.5));",
"}",
].join("\n"),
})
.resample({
id: "resample3",
indices: 2,
channels: 4,
})
.compose({
source: "#resample2",
});
</script>
</body>
</html>