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sources.html
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<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8" />
<title>MathBox - Multiple Sources</title>
<script
type="text/javascript"
src="https://cdn.jsdelivr.net/npm/three@0.137.0/build/three.min.js"
></script>
<script
type="text/javascript"
src="https://cdn.jsdelivr.net/npm/three@0.137.0/examples/js/controls/OrbitControls.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>
<body>
<script type="application/glsl" id="combine-samples">
// Two external sources
vec4 getSampleA(vec4 xyzw);
vec4 getSampleB(vec4 xyzw);
// Original resampled source (unused)
vec4 getSampleDummy(vec4 xyzw);
// Resample shader
vec4 getSample(vec4 xyzw) {
// Get two floats and multiply them
float a = getSampleA(vec4(xyzw.x, 0.0, 0.0, 0.0)).x;
float b = getSampleB(vec4(xyzw.y, 0.0, 0.0, 0.0)).x;
// Return as y value
return vec4(0.0, a * b, 0.0, 0.0);
}
</script>
<script>
// Initialize mathbox
mathbox = MathBox.mathBox({
plugins: ["core", "controls", "cursor", "stats"],
controls: {
klass: THREE.OrbitControls,
},
});
three = mathbox.three;
three.renderer.setClearColor(new THREE.Color(0xffffff), 1.0);
// Cartesian box
view = mathbox
.set({
scale: 720,
focus: 5,
})
.camera({
proxy: true,
position: [2, 1, 3],
})
.cartesian({
range: [
[0, 1],
[0, 1],
[0, 1],
],
scale: [1, 2 / 3, 1],
});
view.axis({
axis: 1,
width: 3,
});
view.axis({
axis: 2,
width: 3,
});
view.axis({
axis: 3,
width: 3,
});
view.grid({
width: 2,
opacity: 0.5,
axes: [1, 2],
zOrder: 1,
});
view.grid({
width: 2,
opacity: 0.5,
axes: [2, 3],
zOrder: 1,
});
view.grid({
width: 2,
opacity: 0.5,
axes: [1, 3],
zOrder: 1,
});
// Make 1D array of values
var array1 = view.interval({
width: 64,
channels: 1,
expr: function (emit, x, i, t) {
emit(Math.sin(x * 5 + t) * 0.5 + 0.5);
},
});
// Draw as curve on X axis
view
.swizzle({
order: "yx",
})
.spread({
unit: "relative",
alignWidth: "first",
width: [1, 0, 0],
})
.line({
width: 3,
color: 0x3090ff,
});
// Make 1D array of values
var array2 = view.interval({
id: "array2",
width: 64,
channels: 1,
expr: function (emit, x, i, t) {
emit(Math.cos(x * 5 - t) * 0.5 + 0.5);
},
});
// Draw as curve on Z axis
view
.swizzle({
order: "yx",
})
.spread({
unit: "relative",
alignWidth: "first",
width: [0, 0, 1],
})
.line({
width: 3,
color: 0x40a000,
});
view
// Make dummy 1x1 matrix
.matrix()
// Use resample shader to multiply two 1D arrays as X and Y.
.shader({
sources: [array1, "#array2"], // Array of selections and selectors
code: "#combine-samples",
})
.resample({
sample: "absolute",
width: 64,
height: 64,
})
// Spread values out on X and Z
.spread({
unit: "relative",
alignWidth: "first",
alignHeight: "first",
width: [1, 0, 0],
height: [0, 0, 1],
})
// Points and grid
.surface({
fill: false,
lineX: true,
lineY: true,
width: 1,
})
.point({
size: 2,
});
</script>
</body>
</html>