mirror of
https://github.com/jugeeya/UltimateTrainingModpack.git
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216bcbc0c2
Moved LOAD64 macro from l2c_imports.hpp to useful.h Moved round_to and the various linear interpolation functions from useful.h to useful_visual.h More formatting fixes
35 lines
1 KiB
C++
35 lines
1 KiB
C++
#include "useful_visual.h"
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#include <math.h>
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#include "useful.h"
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float round_to(float val, float align) {
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return roundf(val / align) * align;
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}
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float lerp(float min, float max, float t) {
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return min + (max - min) * t;
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}
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float unlerp(float min, float max, float val) {
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return (val - min) / (max - min);
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}
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float lerp_bounded(float min, float max, float t) {
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return t <= 0 ? min : t >= 1 ? max : lerp(min, max, t);
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}
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float unlerp_bounded(float min, float max, float val) {
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return val <= min ? 0 : val >= max ? 1 : unlerp(min, max, val);
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}
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Vector3f color_lerp(Vector3f min_color, Vector3f max_color, float t, float gamma) {
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float gamma_inv = 1.0f / gamma;
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float align = 1.0f / 255.0f; // color components must be a multiple of 1/255
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return {
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round_to(powf(lerp_bounded(powf(min_color.x, gamma), powf(max_color.x, gamma), t), gamma_inv), align),
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round_to(powf(lerp_bounded(powf(min_color.y, gamma), powf(max_color.y, gamma), t), gamma_inv), align),
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round_to(powf(lerp_bounded(powf(min_color.z, gamma), powf(max_color.z, gamma), t), gamma_inv), align)
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};
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}
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