add a unit test

test/lib/mayaUsd/render/mayaToHydra/CMakeLists.txt

@@ -32,6 +32,7 @@ set(INTERACTIVE_TEST_SCRIPT_FILES
     testLookThrough.py
     testObjectTemplate.py
     testStandardSurface.py
+    testOpenPBRSurface.py
     testFlowViewportAPI.py
     testStageVariants.py|skipOnPlatform:osx # HYDRA-1127 : refinedWire not working on OSX
     testStagePayloadsReferences.py

test/lib/mayaUsd/render/mayaToHydra/testOpenPBRSurface.py

@@ -0,0 +1,92 @@
+#
+# Copyright 2024 Autodesk, Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+import maya.cmds as cmds
+import fixturesUtils
+import mtohUtils
+import mayaUtils
+
+class TestOpenPBRSurface(mtohUtils.MayaHydraBaseTestCase): #Subclassing mtohUtils.MayaHydraBaseTestCase to be able to call self.assertSnapshotClose
+    # MayaHydraBaseTestCase.setUpClass requirement.
+    _file = __file__
+
+    IMAGE_DIFF_FAIL_THRESHOLD = 0.01
+    IMAGE_DIFF_FAIL_PERCENT = 0.2
+
+    #Test the translation from maya OpenPBR surface with a maya native plane to usd preview surface.
+    def test_OpenPBRSurface(self):
+        # Load a maya scene with a maya native plane, which has autodesk OpenPBR surface as material
+        testFile = mayaUtils.openTestScene(
+                "testOpenPBRSurface",
+                "testOpenPBRSurface.ma")
+        cmds.refresh()
+
+        #Verify Default display
+        panel = mayaUtils.activeModelPanel()
+        cmds.modelEditor(panel, edit=True, displayTextures=True)
+        cmds.refresh()
+        self.assertSnapshotClose("default" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+        #Disconnect the texture
+        cmds.disconnectAttr("file1.outColor", "openPBRSurface1.baseColor")
+        cmds.refresh()
+        self.assertSnapshotClose("default_noTexture" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+        #Verify Base
+        cmds.setAttr("openPBRSurface1.baseColor", 0.5,0.0,0.0, type = 'double3')
+        cmds.refresh()
+        self.assertSnapshotClose("baseColor" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+        cmds.setAttr("openPBRSurface1.baseWeight", 0.5)
+        cmds.refresh()
+        self.assertSnapshotClose("baseWeight" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+        #Verify Metalness
+        cmds.setAttr("openPBRSurface1.baseMetalness", 0.5)
+        cmds.refresh()
+        self.assertSnapshotClose("metalness" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+        #Verify Specular
+        cmds.setAttr("openPBRSurface1.specularColor", 0.0,0.0,5.0, type = 'double3')
+        cmds.refresh()
+        self.assertSnapshotClose("specularColor" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+        cmds.setAttr("openPBRSurface1.specularWeight", 0.5)
+        cmds.refresh()
+        self.assertSnapshotClose("specularWeight" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+        cmds.setAttr("openPBRSurface1.specularRoughness", 0.5)
+        cmds.refresh()
+        self.assertSnapshotClose("specularRoughness" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+        cmds.setAttr("openPBRSurface1.specularIOR", 0.5)
+        cmds.refresh()
+        self.assertSnapshotClose("specularIOR" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+        #Verify Transmission
+        cmds.setAttr("openPBRSurface1.transmissionWeight", 0.5)
+        cmds.refresh()
+        self.assertSnapshotClose("transmissionWeight" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+        cmds.setAttr("openPBRSurface1.geometryOpacity", 0.5)
+        cmds.refresh()
+        self.assertSnapshotClose("geometryOpacity" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+        #Verify Emission
+        cmds.setAttr("openPBRSurface1.emissionColor", 0.0,0.5,0.0, type = 'double3')
+        cmds.refresh()
+        self.assertSnapshotClose("emissionColor" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+        cmds.setAttr("openPBRSurface1.emissionLuminance", 500.0)
+        cmds.refresh()
+        self.assertSnapshotClose("emissionLuminance" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+if __name__ == '__main__':
+    fixturesUtils.runTests(globals())