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Swap gltf up axis

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This commit is contained in:
luboslenco
2026-01-20 11:45:10 +01:00
parent e740b32b42
commit c2566ea430
1 changed files with 10 additions and 4 deletions
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paint/plugins/io_gltf/cgltf.c
+10 -4
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@@ -63,9 +63,12 @@ void io_gltf_parse_mesh(raw_mesh_t *raw, cgltf_mesh *mesh, float *to_world, floa
float *m = to_world;
for (int i = 0; i < vertex_count; ++i) {
// float x = posa32[i * 3 + 0];
// float y = posa32[i * 3 + 1];
// float z = posa32[i * 3 + 2];
float x = posa32[i * 3 + 0];
float y = posa32[i * 3 + 1];
float z = posa32[i * 3 + 2];
float y = -posa32[i * 3 + 2];
float z = posa32[i * 3 + 1];
posa32[i * 3 + 0] = m[0] * x + m[4] * y + m[8] * z + m[12];
posa32[i * 3 + 1] = m[1] * x + m[5] * y + m[9] * z + m[13];
posa32[i * 3 + 2] = m[2] * x + m[6] * y + m[10] * z + m[14];
@@ -73,9 +76,12 @@ void io_gltf_parse_mesh(raw_mesh_t *raw, cgltf_mesh *mesh, float *to_world, floa
if (nora32 != NULL) {
for (int i = 0; i < vertex_count; ++i) {
// float x = nora32[i * 3 + 0] / scale[0];
// float y = nora32[i * 3 + 1] / scale[1];
// float z = nora32[i * 3 + 2] / scale[2];
float x = nora32[i * 3 + 0] / scale[0];
float y = nora32[i * 3 + 1] / scale[1];
float z = nora32[i * 3 + 2] / scale[2];
float y = -nora32[i * 3 + 2] / scale[2];
float z = nora32[i * 3 + 1] / scale[1];
float tx = m[0] * x + m[4] * y + m[8] * z;
float ty = m[1] * x + m[5] * y + m[9] * z;
float tz = m[2] * x + m[6] * y + m[10] * z;