forked from unconed/mathbox
/
ortho.html
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/
ortho.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>MathBox - Ortho</title>
<script src="../../build/mathbox-bundle.js"></script>
<link rel="stylesheet" href="../../build/mathbox.css">
<meta name="viewport" content="initial-scale=1, maximum-scale=1">
</head>
<body>
<!--
Recreation of https://twitter.com/beesandbombs/status/654702843723563009
-->
<script type="application/glsl" id="rotateX">
uniform float seek;
float ease(float t) {
t = clamp(t, 0.0, 1.0);
return (3.0 - 2.0 * t) * t * t;
}
vec4 rotateX(vec4 xyzw, inout vec4 stpq) {
float theta = ease(xyzw.x * .25 + seek) * 1.570796;
float s = sin(theta);
float c = cos(theta);
mat2 m2 = mat2(c, s, -s, c);
return vec4(xyzw.x, m2 * xyzw.yz, xyzw.w);
}
</script>
<script type="application/glsl" id="rotateY">
uniform float seek;
float ease(float t) {
t = clamp(t, 0.0, 1.0);
return (3.0 - 2.0 * t) * t * t;
}
vec4 rotateY(vec4 xyzw, inout vec4 stpq) {
float theta = ease(xyzw.y * .25 + seek) * 1.570796;
float s = sin(theta);
float c = cos(theta);
mat2 m2 = mat2(c, s, -s, c);
vec2 zx = m2 * xyzw.zx;
return vec4(zx.t, xyzw.y, zx.s, xyzw.w);
}
</script>
<script type="application/glsl" id="rotateZ">
uniform float seek;
float ease(float t) {
t = clamp(t, 0.0, 1.0);
return (3.0 - 2.0 * t) * t * t;
}
vec4 rotateZ(vec4 xyzw, inout vec4 stpq) {
float theta = ease(xyzw.z * .25 + seek) * 1.570796;
float s = sin(theta);
float c = cos(theta);
mat2 m2 = mat2(c, s, -s, c);
return vec4((m2 * xyzw.yx).yx, xyzw.zw);
}
</script>
<script>
var ortho = 10000;
var mathbox = mathBox({
plugins: ['core', 'controls', 'cursor', 'mathbox'],
controls: {
// Orbit controls, i.e. Euler angles, with gimbal lock
klass: THREE.OrbitControls,
// Trackball controls, i.e. Free quaternion rotation
//klass: THREE.TrackballControls,
},
camera: {
fov: Math.atan(1/ortho) * 360 / π,
near: ortho / 4,
far: ortho * 4,
},
});
if (mathbox.fallback) throw "WebGL not supported"
var pink = new THREE.Color(187/255, 110/255, 185/255);
var three = mathbox.three;
three.renderer.setClearColor(pink, 1.0);
// Place camera
var camera =
mathbox
.set({
focus: ortho,
scale: 720,
})
.camera({
proxy: true,
position: [ortho, ortho, ortho],
});
// Sample volume
var volume =
mathbox
.volume({
width: 17,
height: 17,
depth: 17,
});
var xf = mathbox;
// Rotate Z axis
xf =
xf
.shader({
code: '#rotateZ',
})
.play({
to: 3,
pace: 2,
delay: 4,
loop: true,
ease: 'linear',
script: {
0: {props: {seek: -.5}},
1: {props: {seek: 1.5}},
1.00001: {props: {seek: -.5}},
},
})
.vertex();
// Rotate Y axis
xf =
xf
.shader({
code: '#rotateY',
})
.play({
to: 3,
delay: 2,
pace: 2,
loop: true,
ease: 'linear',
script: {
0: {props: {seek: -.5}},
1: {props: {seek: 1.5}},
1.00001: {props: {seek: -.5}},
},
})
.vertex();
// Rotate X axis
xf =
xf
.shader({
code: '#rotateX',
})
.play({
to: 3,
delay: 0,
pace: 2,
loop: true,
ease: 'linear',
script: {
0: {props: {seek: -.5}},
1: {props: {seek: 1.5}},
1.00001: {props: {seek: -.5}},
},
})
.vertex();
// Render lines
xf.group().resample({ shader: null, height: 9, depth: 9 }).line({ color: '#fff', width: 4 });
xf.group().transpose({ order: 'yzxw' }).resample({ shader: null, height: 9, depth: 9 }).line({ color: '#fff', width: 4 });
xf.group().transpose({ order: 'zxyw' }).resample({ shader: null, height: 9, depth: 9 }).line({ color: '#fff', width: 4 });
</script>
</body>
</html>