22 lines
958 B
HLSL
22 lines
958 B
HLSL
/*
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contributors: Patricio Gonzalez Vivo
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description: returns a 3x3 rotation matrix
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use: <float3x3> rotate3d(<float3> axis, <float> radians)
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license:
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Prosperity License - https://prosperitylicense.com/versions/3.0.0
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- Copyright (c) 2021 Patricio Gonzalez Vivo under Patron License - https://lygia.xyz/license
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*/
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#ifndef FNC_ROTATE3D
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#define FNC_ROTATE3D
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float3x3 rotate3d(in float3 axis, in float radians) {
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axis = normalize(axis);
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float s = sin(radians);
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float c = cos(radians);
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float oc = 1.0 - c;
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return float3x3(oc * axis.x * axis.x + c, oc * axis.x * axis.y - axis.z * s, oc * axis.z * axis.x + axis.y * s,
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oc * axis.x * axis.y + axis.z * s, oc * axis.y * axis.y + c, oc * axis.y * axis.z - axis.x * s,
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oc * axis.z * axis.x - axis.y * s, oc * axis.y * axis.z + axis.x * s, oc * axis.z * axis.z + c );
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}
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#endif
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