StackGenVis: Alignment of Data, Algorithms, and Models for Stacking Ensemble Learning Using Performance Metrics
https://doi.org/10.1109/TVCG.2020.3030352
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54 lines
1.1 KiB
54 lines
1.1 KiB
4 years ago
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module.exports = fromRotation
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/**
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* Creates a matrix from a given angle around a given axis
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* This is equivalent to (but much faster than):
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*
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* mat4.identity(dest)
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* mat4.rotate(dest, dest, rad, axis)
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*
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* @param {mat4} out mat4 receiving operation result
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* @param {Number} rad the angle to rotate the matrix by
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* @param {vec3} axis the axis to rotate around
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* @returns {mat4} out
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*/
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function fromRotation(out, rad, axis) {
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var s, c, t
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var x = axis[0]
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var y = axis[1]
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var z = axis[2]
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var len = Math.sqrt(x * x + y * y + z * z)
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if (Math.abs(len) < 0.000001) {
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return null
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}
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len = 1 / len
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x *= len
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y *= len
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z *= len
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s = Math.sin(rad)
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c = Math.cos(rad)
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t = 1 - c
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// Perform rotation-specific matrix multiplication
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out[0] = x * x * t + c
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out[1] = y * x * t + z * s
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out[2] = z * x * t - y * s
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out[3] = 0
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out[4] = x * y * t - z * s
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out[5] = y * y * t + c
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out[6] = z * y * t + x * s
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out[7] = 0
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out[8] = x * z * t + y * s
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out[9] = y * z * t - x * s
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out[10] = z * z * t + c
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out[11] = 0
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out[12] = 0
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out[13] = 0
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out[14] = 0
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out[15] = 1
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return out
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}
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