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glTF: Fix tangent generation for non-blend shapes 

PR #30877 was bogus as it made a blend shape-specific code block apply
to everything but blend shapes (as it seemed not to work properly *for*
blend shapes).

The proper fix should thus be to simply remove the problematic
block (and thus cleanup unnecessary logic).

Fixes #32712.

(cherry picked from commit 0034c88c57)
This commit is contained in:
Rémi Verschelde 2020-03-24 11:14:29 +01:00
parent 48bc3fd297
commit 5f5ef98832
1 changed files with 3 additions and 13 deletions
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16
editor/import/editor_scene_importer_gltf.cpp
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@ -1070,24 +1070,15 @@ Error EditorSceneImporterGLTF::_parse_meshes(GLTFState &state) {
array[Mesh::ARRAY_INDEX] = indices;
}
bool generated_tangents = false;
Variant erased_indices;
bool generate_tangents = (primitive == Mesh::PRIMITIVE_TRIANGLES && !a.has("TANGENT") && a.has("TEXCOORD_0") && a.has("NORMAL"));
if (primitive == Mesh::PRIMITIVE_TRIANGLES && !a.has("TANGENT") && a.has("TEXCOORD_0") && a.has("NORMAL")) {
if (generate_tangents) {
//must generate mikktspace tangents.. ergh..
Ref<SurfaceTool> st;
st.instance();
st->create_from_triangle_arrays(array);
if (!p.has("targets")) {
//morph targets should not be reindexed, as array size might differ
//removing indices is the best bet here
st->deindex();
erased_indices = a[Mesh::ARRAY_INDEX];
a[Mesh::ARRAY_INDEX] = Variant();
}
st->generate_tangents();
array = st->commit_to_arrays();
generated_tangents = true;
}
Array morphs;
@ -1202,10 +1193,9 @@ Error EditorSceneImporterGLTF::_parse_meshes(GLTFState &state) {
array_copy[Mesh::ARRAY_TANGENT] = tangents_v4;
}
if (generated_tangents) {
if (generate_tangents) {
Ref<SurfaceTool> st;
st.instance();
array_copy[Mesh::ARRAY_INDEX] = erased_indices; //needed for tangent generation, erased by deindex
st->create_from_triangle_arrays(array_copy);
st->deindex();
st->generate_tangents();