fix: Use native GLTF material when mappingType is 'uv' to preserve exact original UV mappings and texture orientations

2026-09-03 15:19:50 +05:30
parent a5126d618a
commit b73315791c
1 changed files with 12 additions and 1 deletions
@@ -58,7 +58,7 @@ const MeshMaterialManager = ({ mesh, sceneObj, textureCache }: MeshMaterialManag
      
      activeMat.triplanarUniforms.uTriplanarScale.value = uvScale;
      activeMat.triplanarUniforms.uBlendSharpness.value = 5.0; // Default or from props
-    } else {
+    } else if (mappingType !== 'uv') {
      activeMat = MaterialFactory.getInstance().getStandardUVMaterial(
        baseParams,
        mesh.uuid
@@ -71,6 +71,9 @@ const MeshMaterialManager = ({ mesh, sceneObj, textureCache }: MeshMaterialManag

      activeMat.uvUniforms.uMappingMode.value = modeIndex;
      activeMat.updateUVTransform(uvOffset, [uvTiling[0] * uvScale, uvTiling[1] * uvScale], uvRotation * (Math.PI / 180));
+    } else {
+      // Use the native material to preserve exact GLTF UV behavior
+      activeMat = origMat;
    }

    // Apply basic props
@@ -117,6 +120,14 @@ const MeshMaterialManager = ({ mesh, sceneObj, textureCache }: MeshMaterialManag
        if (mappingType === 'triplanar') activeMat.triplanarUniforms['t' + type.charAt(0).toUpperCase() + type.slice(1).replace('Map', '')].value = null;
        activeMat.needsUpdate = true;
      }
+
+      // Native UV mapping transforms
+      if (mappingType === 'uv' && activeMat[type]) {
+        activeMat[type].repeat.set(uvTiling[0] * uvScale, uvTiling[1] * uvScale);
+        activeMat[type].offset.set(uvOffset[0], uvOffset[1]);
+        activeMat[type].rotation = uvRotation * (Math.PI / 180);
+        activeMat[type].needsUpdate = true;
+      }
    });

    mesh.visible = sceneObj.visible;