organicmaps/fast_obj
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added lazy fill for vertex_color_index

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Max Rigout 2023-08-02 22:18:31 -04:00
parent 9037820f30
commit 2c91cb2993
1 changed files with 17 additions and 0 deletions
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17
fast_obj.h
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@ -662,11 +662,19 @@ const char* parse_vertex(fastObjData* data, const char* ptr)
}
#ifdef FAST_OBJ_ENABLE_COLOURS
#ifndef FAST_OBJ_LAZY_FILL
/* Default the vertex color to the default color index */
array_push(data->vertex_color_index, 0);
#endif
ptr = skip_whitespace(ptr);
if (!is_newline(*ptr))
{
#ifdef FAST_OBJ_LAZY_FILL
unsigned int oldSz = array_size(data->vertex_color_index);
_array_grow(data->vertex_color_index, array_size(data->mesh->positions) / 3);
_array_size(data->vertex_color_index) = array_size(data->mesh->positions) / 3;
memset(data->vertex_color_index + oldSz, 0, array_size(data->vertex_color_index) - oldSz);
#endif
/* We associate the current vertex position with the vertex color */
data->vertex_color_index[array_size(data->vertex_color_index) - 1] = array_size(data->mesh->colors) / 3;
for (ii = 0; ii < 3; ++ii)
@ -1354,6 +1362,15 @@ void parse_buffer(fastObjData* data, const char* ptr, const char* end, const fas
data->line++;
}
#ifdef FAST_OBJ_LAZY_FILL
if (array_size(data->vertex_color_index) < array_size(data->mesh->positions) / 3)
{
unsigned int oldSz = array_size(data->vertex_color_index);
_array_grow(data->vertex_color_index, array_size(data->mesh->positions) / 3);
_array_size(data->vertex_color_index) = array_size(data->mesh->positions) / 3;
memset(data->vertex_color_index + oldSz, 0, array_size(data->vertex_color_index) - oldSz);
}
#endif
}