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Save viewport matrix in a variable

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Abdelrahman Said 2024-08-31 22:24:04 +01:00
parent 41c30256b7
commit 95d474c956
1 changed files with 3 additions and 1 deletions
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4
src/model/render.c
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@ -4,6 +4,7 @@
#include "utils.h"
#include "vec.h"
#include <math.h>
#include <stdio.h>
#define TRIANGLE_VERTICES 3
@ -211,7 +212,8 @@ internal V3f get_barycentric_coords(V3f a, V3f b, V3f c, V3f p) {
internal V3f get_viewport_vertex(const V3f *vertex, const Image *img) {
V4f vh = {.x = vertex->x, .y = 0.0f - vertex->y, .z = vertex->z, .w = 1.0f};
vh = mat4x4_mul_vec4(viewport(vh.x, vh.y, img->width, img->height), vh);
M4x4f vp = viewport(vh.x, vh.y, img->width, img->height);
vh = mat4x4_mul_vec4(vp, vh);
V3f output = project_vec4(vh);
output.x = clamp(output.x, 0.0f, img->width);