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Fix #3177 #3109

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Ray 2023-08-10 22:45:25 +02:00
parent 0959f6ebf6
commit f1c31bee27
1 changed files with 17 additions and 7 deletions
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22
src/rmodels.c
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@ -5576,7 +5576,7 @@ static Model LoadM3D(const char *fileName)
m3dp_t *prop = NULL;
unsigned int bytesRead = 0;
unsigned char *fileData = LoadFileData(fileName, &bytesRead);
int i, j, k, l, n, mi = -2;
int i, j, k, l, n, mi = -2, vcolor = 0;
if (fileData != NULL)
{
@ -5606,10 +5606,13 @@ static Model LoadM3D(const char *fileName)
}
else
{
model.meshCount = model.materialCount = 1;
model.meshCount = 1; model.materialCount = 0;
TRACELOG(LOG_INFO, "MODEL: No materials, putting all meshes in a default material");
}
// We always need a default material, so we add +1
model.materialCount++;
model.meshes = (Mesh *)RL_CALLOC(model.meshCount, sizeof(Mesh));
model.meshMaterial = (int *)RL_CALLOC(model.meshCount, sizeof(int));
model.materials = (Material *)RL_CALLOC(model.materialCount + 1, sizeof(Material));
@ -5634,7 +5637,14 @@ static Model LoadM3D(const char *fileName)
k++;
mi = m3d->face[i].materialid;
for (j = i, l = 0; (j < (int)m3d->numface) && (mi == m3d->face[j].materialid); j++, l++);
// Only allocate colors VertexBuffer if there's a color vertex in the model for this material batch
// if all colors are fully transparent black for all verteces of this materal, then we assume no vertex colors
for (j = i, l = vcolor = 0; (j < (int)m3d->numface) && (mi == m3d->face[j].materialid); j++, l++)
{
if (!m3d->vertex[m3d->face[j].vertex[0]].color ||
!m3d->vertex[m3d->face[j].vertex[1]].color ||
!m3d->vertex[m3d->face[j].vertex[2]].color) vcolor = 1;
}
model.meshes[k].vertexCount = l*3;
model.meshes[k].triangleCount = l;
@ -5642,9 +5652,9 @@ static Model LoadM3D(const char *fileName)
model.meshes[k].texcoords = (float *)RL_CALLOC(model.meshes[k].vertexCount*2, sizeof(float));
model.meshes[k].normals = (float *)RL_CALLOC(model.meshes[k].vertexCount*3, sizeof(float));
// If no map is provided, we allocate storage for vertex colors
// M3D specs only consider vertex colors if no material is provided
if (mi != M3D_UNDEF) model.meshes[k].colors = RL_CALLOC(model.meshes[k].vertexCount*4, sizeof(unsigned char));
// If no map is provided, or we have colors defined, we allocate storage for vertex colors
// M3D specs only consider vertex colors if no material is provided, however raylib uses both and mixes the colors
if ((mi == M3D_UNDEF) || vcolor) model.meshes[k].colors = RL_CALLOC(model.meshes[k].vertexCount*4, sizeof(unsigned char));
if (m3d->numbone && m3d->numskin)
{