35 lines
837 B
C
35 lines
837 B
C
#include "color.h"
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#include "utils.h"
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#include <math.h>
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#include <stdio.h>
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Color color_add(Color c1, Color c2) {
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return (Color){c1.r + c2.r, c1.g + c2.g, c1.b + c2.b};
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}
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Color color_mul(Color c1, Color c2) {
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return (Color){c1.r * c2.r, c1.g * c2.g, c1.b * c2.b};
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}
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Color color_lerp(Color c1, Color c2, double t) {
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return (Color){
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(1.0 - t) * c1.r + t * c2.r,
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(1.0 - t) * c1.g + t * c2.g,
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(1.0 - t) * c1.b + t * c2.b,
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};
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}
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void color_write(FILE *out, Color c, int samples_per_pixel) {
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double scale = 1.0 / samples_per_pixel;
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double r = sqrt(c.r * scale);
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double g = sqrt(c.g * scale);
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double b = sqrt(c.b * scale);
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int ir = (int)(256 * clamp(r, 0.0, 0.999));
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int ig = (int)(256 * clamp(g, 0.0, 0.999));
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int ib = (int)(256 * clamp(b, 0.0, 0.999));
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fprintf(out, "%d %d %d\n", ir, ig, ib);
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}
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