39 lines
1 KiB
GLSL
39 lines
1 KiB
GLSL
#include "../math/rotate4dZ.glsl"
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/*
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contributors: Patricio Gonzalez Vivo
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description: rotate a 2D space by a radian angle
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use: rotateZ(<vec3|vec4> pos, float radian [, vec3 center])
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options:
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- CENTER_3D
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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_ROTATEZ
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#define FNC_ROTATEZ
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vec4 rotateZ(in vec4 v, in float r, in vec4 c) {
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return rotate4dZ(r) * (v - c) + c;
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}
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vec4 rotateZ(in vec4 v, in float r) {
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#ifdef CENTER_4D
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return rotate4dZ(r) * (v - CENTER_3D) + CENTER_3D;
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#else
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return rotate4dZ(r) * v;
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#endif
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}
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vec3 rotateZ(in vec3 v, in float r, in vec3 c) {
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return (rotate4dZ(r) * vec4(v - c, 0.0) ).xyz + c;
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}
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vec3 rotateZ(in vec3 v, in float r) {
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#ifdef CENTER_3D
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return (rotate4dZ(r) * vec4(v - CENTER_3D, 0.0)).xyz + CENTER_3D;
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#else
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return (rotate4dZ(r) * vec4(v, 0.0)).xyz;
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#endif
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}
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#endif
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