Add unit test for Default Lighting with UsdStage (#168)

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

@@ -42,6 +42,7 @@ set(INTERACTIVE_TEST_SCRIPT_FILES
     testBackgroundColor.py
     testGrid.py
     testUsdTextureToggle.py
+    testUsdStageDefaultLighting.py
     # To be reenabled after investigation
     testDataProducerSelHighlight.py|skipOnPlatform:osx # HYDRA-1127 : refinedWire not working on OSX
     testPassingNormalsOnMayaNative.py

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

@@ -0,0 +1,58 @@
+#
+# 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
+
+import platform
+
+class TestUsdTextureToggle(mtohUtils.MayaHydraBaseTestCase): #Subclassing mtohUtils.MayaHydraBaseTestCase to be able to call self.assertSnapshotClose
+    # MayaHydraBaseTestCase.setUpClass requirement.
+    _file = __file__
+
+    IMAGE_DIFF_FAIL_THRESHOLD = 0.1
+    IMAGE_DIFF_FAIL_PERCENT = 1.5
+
+    def setUp(self):
+        # Open simple Maya scene
+        testFile = mayaUtils.openTestScene(
+                "testUsdStageDefaultLighting",
+                "testUsdStageDefaultLighting.ma")
+        cmds.refresh()
+
+    def setTextureMode(self, enabled):
+        cmds.modelEditor(mayaUtils.activeModelPanel(), edit=True, displayTextures=enabled)        
+        cmds.refresh()
+
+    def setCameraTransform(self, xtrans, ytrans, ztrans, xrot, yrot, zrot ):
+        #Move camera
+        cmds.setAttr('persp.translate', xtrans, ytrans, ztrans, type='float3')
+        cmds.setAttr('persp.rotate', xrot, yrot, zrot, type='float3')
+
+    def test_UsdStageDefaultLighting(self):
+        self.setHdStormRenderer()        
+        self.setTextureMode(True)
+
+        self.setCameraTransform(-21, 7, 18, -20, -50, 0)
+        self.assertSnapshotClose("usdStageDefaultLighting_1" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+        self.setCameraTransform(20, 12, 16, -30, 50, 0)
+        self.assertSnapshotClose("usdStageDefaultLighting_2" + ".png", self.IMAGE_DIFF_FAIL_THRESHOLD, self.IMAGE_DIFF_FAIL_PERCENT)
+
+if __name__ == '__main__':
+    fixturesUtils.runTests(globals())