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X Pack: Added fix for zero normals

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korenkonder
2025-03-25 20:41:11 +03:00
parent 36f24dbbf1
commit b107c512c9
1 changed files with 52 additions and 0 deletions
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src/CRE/object.cpp
+52
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@@ -18,6 +18,7 @@
#include <list>
#include <map>
#include <new>
#include <unordered_map>
#include <vector>
static GLuint create_index_buffer(size_t size, const void* data);
@@ -1059,6 +1060,57 @@ void object_material_msgpack_read(const char* path, const char* set_name,
vtx->color0.w = 1.0f;
}
msgpack* fix_normals = _mesh.read("fix_zero_normals");
if (fix_normals && fix_normals->read_bool()) {
std::unordered_map<uint32_t, vec3> normals;
obj_vertex_data* vtx = mesh.vertex_array;
for (size_t l = 0; l < mesh.num_submesh; l++) {
obj_sub_mesh& sub_mesh = mesh.submesh_array[l];
if (sub_mesh.primitive_type != OBJ_PRIMITIVE_TRIANGLES)
continue;
uint32_t* index = sub_mesh.index_array;
int32_t num_index = sub_mesh.num_index;
for (int32_t l = 0; l < num_index; l++) {
if (vtx[index[l]].normal != 0.0f)
continue;
const int32_t idx = l / 3 * 3;
const uint32_t v[3] = { index[idx + 0], index[idx + 1], index[idx + 2] };
bool found = false;
for (int32_t m = 0; m < 3; m++) {
if (vtx[v[m]].normal == 0.0f)
continue;
vec3 normal = vtx[v[m]].normal;
if (vtx[v[0]].normal == 0.0f)
normals[v[0]] += normal;
if (vtx[v[1]].normal == 0.0f)
normals[v[1]] += normal;
if (vtx[v[2]].normal == 0.0f)
normals[v[2]] += normal;
found = true;
}
if (!found) {
const vec3 p0 = vtx[v[0]].position;
const vec3 p1 = vtx[v[1]].position;
const vec3 p2 = vtx[v[2]].position;
const vec3 normal = vec3::cross(p1 - p0, p2 - p0);
normals[v[0]] += normal;
normals[v[1]] += normal;
normals[v[2]] += normal;
}
}
}
for (auto& l : normals)
vtx[l.first].normal = vec3::normalize(l.second);
}
msgpack* invert_negative_color = _mesh.read("invert_negative_color");
if (invert_negative_color && invert_negative_color->read_bool()) {
obj_vertex_data* vtx = mesh.vertex_array;