Use renderSettingsPrimPath metadata

testsuite/test_1223/README

@@ -0,0 +1,5 @@
+Support renderSettingsPrimPath metadata in the reader
+
+author: cyril.pichard
+
+PARAMS: {'scene':'test.usda', 'kick_params':''}

testsuite/test_1223/data/test.usda

@@ -0,0 +1,146 @@
+#usda 1.0
+(
+    renderSettingsPrimPath = "/Render/TertiarySettings"
+)
+
+def Scope "Render"
+{
+    def RenderSettings "PrimarySettings"
+    {
+        rel camera = </World/main_cam0002>
+        rel products = </Render/PrimaryProduct>
+    }
+
+    def RenderSettings "SecondarySettings"
+    {
+        rel camera = </World/main_cam0001>
+        rel products = </Render/PrimaryProduct>
+    }
+
+    def RenderSettings "TertiarySettings"
+    {
+        rel camera = </World/main_cam>
+        rel products = </Render/PrimaryProduct>
+    }
+
+    def RenderProduct "PrimaryProduct"
+    {
+        rel camera = </World/main_cam>
+    }
+
+}
+
+def "World"
+{
+    def Camera "main_cam"
+    {
+        matrix4d xformOp:transform.timeSamples = {
+            1: ( (-0.8191520442889908, 1.6321175169494996e-15, -0.5735764363510479, 0), (-0.15809909227474528, 0.9612616959383157, 0.22578890349991687, 0), (0.551357057957064, 0.2756373558170103, -0.7874194833245733, 0), (12.157394811434061, 6.323548585074947, -16.733218418488544, 1) ),
+        }
+        uniform token[] xformOpOrder = ["xformOp:transform"]
+    }
+
+    def DomeLight "light"
+    {
+        float inputs:intensity = 0.1
+    }
+
+    def Xform "Plane"
+    {
+        matrix4d xformOp:transform = ( (0.8840559124946594, 0.46738117933273315, 0, 0), (-0.35344699025154114, 0.6685483455657959, 0.6543075442314148, 0), (0.3058110177516937, -0.5784444212913513, 0.7562285661697388, 0), (0, 0, 0, 1) )
+        uniform token[] xformOpOrder = ["xformOp:transform"]
+
+        def Mesh "Plane"
+        {
+            uniform bool doubleSided = 1
+            int[] faceVertexCounts = [4]
+            int[] faceVertexIndices = [0, 1, 3, 2]
+            normal3f[] normals = [(-0.16940932, -0.16940932, 0.9708764), (-0.16940932, -0.16940932, 0.9708764), (-0.16940932, -0.16940932, 0.9708764), (-0.16940932, -0.16940932, 0.9708764)] (
+                interpolation = "faceVarying"
+            )
+            point3f[] points = [(-1, -1, 0), (1, -1, 0), (-1, 1, 0), (1, 1, 0.69796455)]
+            color3f[] primvars:displayColor = [(0.6666666, 0.090014055, 0.090014055)]
+            texCoord2f[] primvars:UVMap = [(1, 1), (2, 1), (2, 2), (1, 1)] (
+                interpolation = "faceVarying"
+            )
+            uniform token subdivisionScheme = "none"
+        }
+    }
+
+    def Camera "main_cam0001"
+    {
+        float4[] clippingPlanes.timeSamples = {
+            1: [],
+        }
+        float2 clippingRange.timeSamples = {
+            1: (1, 1000000),
+        }
+        float focalLength.timeSamples = {
+            1: 49.999996,
+        }
+        float focusDistance.timeSamples = {
+            1: 0,
+        }
+        float fStop.timeSamples = {
+            1: 0,
+        }
+        float horizontalAperture.timeSamples = {
+            1: 20.955,
+        }
+        float horizontalApertureOffset.timeSamples = {
+            1: 0,
+        }
+        token projection.timeSamples = {
+            1: "perspective",
+        }
+        float verticalAperture.timeSamples = {
+            1: 8.980715,
+        }
+        float verticalApertureOffset.timeSamples = {
+            1: 0,
+        }
+        matrix4d xformOp:transform.timeSamples = {
+            1: ( (-0.7986355100472944, 1.4787140733094438e-15, -0.6018150231520465, 0), (-0.1455922312013086, 0.9702957262759928, 0.1932074164838614, 0), (0.5839385449731187, 0.24192189559968225, -0.7749126222511372, 0), (12.157394811434061, 6.323548585074947, -16.733218418488544, 1) ),
+        }
+        uniform token[] xformOpOrder = ["xformOp:transform"]
+    }
+
+    def Camera "main_cam0002"
+    {
+        float4[] clippingPlanes.timeSamples = {
+            1: [],
+        }
+        float2 clippingRange.timeSamples = {
+            1: (1, 1000000),
+        }
+        float focalLength.timeSamples = {
+            1: 49.999996,
+        }
+        float focusDistance.timeSamples = {
+            1: 0,
+        }
+        float fStop.timeSamples = {
+            1: 0,
+        }
+        float horizontalAperture.timeSamples = {
+            1: 20.955,
+        }
+        float horizontalApertureOffset.timeSamples = {
+            1: 0,
+        }
+        token projection.timeSamples = {
+            1: "perspective",
+        }
+        float verticalAperture.timeSamples = {
+            1: 8.980715,
+        }
+        float verticalApertureOffset.timeSamples = {
+            1: 0,
+        }
+        matrix4d xformOp:transform.timeSamples = {
+            1: ( (-0.7986355100472973, 7.853356648234202e-16, -0.6018150231520436, 0), (-0.23514786313800393, 0.9205048534524346, 0.3120517540923984, 0), (0.5539736496920457, 0.39073112848928726, -0.7351478631379975, 0), (12.157394811434061, 6.323548585074947, -16.733218418488544, 1) ),
+        }
+        uniform token[] xformOpOrder = ["xformOp:transform"]
+    }
+}
+

translator/reader/reader.cpp

@@ -407,7 +407,16 @@ void UsdArnoldReader::ReadStage(UsdStageRefPtr stage, const std::string &path)
 
         // Simplest use case : the render settings name has been explicitely set.
         std::string optionsName = _renderSettings;
-        // If not, we'll first search for a primitive called "options", which is the node name
+
+        // If not, we'll first search for a metadata called renderSettingsPrimPath on the stage
+        // https://graphics.pixar.com/usd/release/api/usd_render_page_front.html
+        if (optionsName.empty() && _stage->HasMetadata(UsdRenderTokens->renderSettingsPrimPath)) {
+            VtValue renderSettingsPrimPath;
+            _stage->GetMetadata(UsdRenderTokens->renderSettingsPrimPath, &renderSettingsPrimPath);
+            optionsName = renderSettingsPrimPath.Get<std::string>();
+        }
+
+        // If not found, we'll search for a primitive called "options", which is the node name
         // in Arnold, and which is the name we author by default
         if (optionsName.empty())
             optionsName = "/options";