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fix default glTF metallic & roughness factor values 

The glTF 2.0 spec says that these pbrMetallicRoughness material
properties should be set as 1.0 by default.
In fact, KhronosGroup's official Blender Exporter does not even write
down those parameters if they are set as 1.0.

However, Godot import them as 0.0.

https://github.com/KhronosGroup/glTF/tree/master/specification/2.0#pbrmetallicroughness

Fixes: #19613 https://github.com/godotengine/godot/issues/19613
This commit is contained in:
Rodolfo Ribeiro Gomes 2018-06-20 23:44:08 -03:00
parent a9acdd84b7
commit 01b01209a3
1 changed files with 5 additions and 2 deletions
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7
editor/import/editor_scene_importer_gltf.cpp
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@ -1256,12 +1256,15 @@ Error EditorSceneImporterGLTF::_parse_materials(GLTFState &state) {
} }
if (mr.has("metallicFactor")) { if (mr.has("metallicFactor")) {
material->set_metallic(mr["metallicFactor"]); material->set_metallic(mr["metallicFactor"]);
} else {
material->set_metallic(1.0);
} }
if (mr.has("roughnessFactor")) {
if (mr.has("roughnessFactor")) {
material->set_roughness(mr["roughnessFactor"]); material->set_roughness(mr["roughnessFactor"]);
} else {
material->set_roughness(1.0);
} }
if (mr.has("metallicRoughnessTexture")) { if (mr.has("metallicRoughnessTexture")) {