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Remove requirement to have vertex positions when creating a mesh. Meshes can now be constructed from an index buffer alone

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This commit is contained in:
clayjohn
2022-06-24 11:22:26 -07:00
parent b35ff86c17
commit bbbcdd725a
10 changed files with 60 additions and 37 deletions
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5
scene/resources/mesh.cpp
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@ -201,7 +201,9 @@ Ref<TriangleMesh> Mesh::generate_triangle_mesh() const {
continue;
}
int len = (surface_get_format(i) & ARRAY_FORMAT_INDEX) ? surface_get_array_index_len(i) : surface_get_array_len(i);
if ((primitive == PRIMITIVE_TRIANGLES && (len == 0 || (len % 3) != 0)) || (primitive == PRIMITIVE_TRIANGLE_STRIP && len < 3)) {
if ((primitive == PRIMITIVE_TRIANGLES && (len == 0 || (len % 3) != 0)) ||
(primitive == PRIMITIVE_TRIANGLE_STRIP && len < 3) ||
(surface_get_format(i) & ARRAY_FLAG_USES_EMPTY_VERTEX_ARRAY)) {
// Error was already shown, just skip (including zero).
continue;
}
@ -211,6 +213,7 @@ Ref<TriangleMesh> Mesh::generate_triangle_mesh() const {
int vc = surface_get_array_len(i);
Vector<Vector3> vertices = a[ARRAY_VERTEX];
ERR_FAIL_COND_V(vertices.is_empty(), Ref<TriangleMesh>());
const Vector3 *vr = vertices.ptr();
int32_t from_index = widx / 3;

1
scene/resources/mesh.h
View File

@ -144,6 +144,7 @@ public:
ARRAY_FLAG_USE_DYNAMIC_UPDATE = RS::ARRAY_FLAG_USE_DYNAMIC_UPDATE,
ARRAY_FLAG_USE_8_BONE_WEIGHTS = RS::ARRAY_FLAG_USE_8_BONE_WEIGHTS,
ARRAY_FLAG_USES_EMPTY_VERTEX_ARRAY = RS::ARRAY_FLAG_USES_EMPTY_VERTEX_ARRAY,
};
virtual int get_surface_count() const;