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enable camera frustum culling for bsp rendering

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asrael 2025-11-10 10:24:27 -06:00
parent 704b14b2a0
commit ac8ab8d60d
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GPG key ID: 2786557804DFAE24
4 changed files with 36 additions and 82 deletions
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48
src/pxl8_math.c
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@ -255,35 +255,35 @@ pxl8_frustum pxl8_frustum_from_matrix(pxl8_mat4 vp) {
pxl8_frustum frustum;
const f32* m = vp.m;
frustum.planes[0].normal.x = m[3] - m[0];
frustum.planes[0].normal.y = m[7] - m[4];
frustum.planes[0].normal.z = m[11] - m[8];
frustum.planes[0].distance = m[15] - m[12];
frustum.planes[0].normal.x = m[12] - m[0];
frustum.planes[0].normal.y = m[13] - m[1];
frustum.planes[0].normal.z = m[14] - m[2];
frustum.planes[0].distance = m[15] - m[3];
frustum.planes[1].normal.x = m[3] + m[0];
frustum.planes[1].normal.y = m[7] + m[4];
frustum.planes[1].normal.z = m[11] + m[8];
frustum.planes[1].distance = m[15] + m[12];
frustum.planes[1].normal.x = m[12] + m[0];
frustum.planes[1].normal.y = m[13] + m[1];
frustum.planes[1].normal.z = m[14] + m[2];
frustum.planes[1].distance = m[15] + m[3];
frustum.planes[2].normal.x = m[3] + m[1];
frustum.planes[2].normal.y = m[7] + m[5];
frustum.planes[2].normal.z = m[11] + m[9];
frustum.planes[2].distance = m[15] + m[13];
frustum.planes[2].normal.x = m[12] + m[4];
frustum.planes[2].normal.y = m[13] + m[5];
frustum.planes[2].normal.z = m[14] + m[6];
frustum.planes[2].distance = m[15] + m[7];
frustum.planes[3].normal.x = m[3] - m[1];
frustum.planes[3].normal.y = m[7] - m[5];
frustum.planes[3].normal.z = m[11] - m[9];
frustum.planes[3].distance = m[15] - m[13];
frustum.planes[3].normal.x = m[12] - m[4];
frustum.planes[3].normal.y = m[13] - m[5];
frustum.planes[3].normal.z = m[14] - m[6];
frustum.planes[3].distance = m[15] - m[7];
frustum.planes[4].normal.x = m[3] - m[2];
frustum.planes[4].normal.y = m[7] - m[6];
frustum.planes[4].normal.z = m[11] - m[10];
frustum.planes[4].distance = m[15] - m[14];
frustum.planes[4].normal.x = m[12] - m[8];
frustum.planes[4].normal.y = m[13] - m[9];
frustum.planes[4].normal.z = m[14] - m[10];
frustum.planes[4].distance = m[15] - m[11];
frustum.planes[5].normal.x = m[3] + m[2];
frustum.planes[5].normal.y = m[7] + m[6];
frustum.planes[5].normal.z = m[11] + m[10];
frustum.planes[5].distance = m[15] + m[14];
frustum.planes[5].normal.x = m[12] + m[8];
frustum.planes[5].normal.y = m[13] + m[9];
frustum.planes[5].normal.z = m[14] + m[10];
frustum.planes[5].distance = m[15] + m[11];
for (i32 i = 0; i < 6; i++) {
f32 len = pxl8_vec3_length(frustum.planes[i].normal);