68 lines
1.7 KiB
HLSL
68 lines
1.7 KiB
HLSL
/*
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contributors: Patricio Gonzalez Vivo
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description: scale a 2D space variable
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use: scale(<float2> st, <float2|float> scale_factor [, <float2> center])
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options:
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- CENTER
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- CENTER_2D
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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_SCALE
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#define FNC_SCALE
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float scale(in float st, in float s, in float center) {
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return (st - center) * s + center;
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}
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float scale(in float st, in float s) {
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#ifdef CENTER_2D
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return scale(st, s, CENTER);
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#else
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return scale(st, s, .5);
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#endif
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}
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float2 scale(in float2 st, in float2 s, in float2 center) {
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return (st - center) * s + center;
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}
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float2 scale(in float2 st, in float value, in float2 center) {
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return scale(st, float2(value, value), center);
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}
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float2 scale(in float2 st, in float2 s) {
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#ifdef CENTER_2D
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return scale(st, s, CENTER_2D);
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#else
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return scale(st, s, float2(.5, .5));
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#endif
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}
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float2 scale(in float2 st, in float value) {
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return scale(st, float2(value, value));
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}
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float3 scale(in float3 st, in float3 s, in float3 center) {
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return (st - center) * s + center;
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}
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float3 scale(in float3 st, in float value, in float3 center) {
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return scale(st, float3(value, value, value), center);
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}
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float3 scale(in float3 st, in float3 s) {
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#ifdef CENTER_3D
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return scale(st, s, CENTER_3D);
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#else
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return scale(st, s, float3(.5, .5, .5));
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#endif
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}
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float3 scale(in float3 st, in float value) {
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return scale(st, float3(value, value, value));
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}
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#endif
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