primvar extraction for multiple timestamps fix (#713)

GPUOpen-LibrariesAndSDKs · Nov 14, 2023 · f42ba0f · f42ba0f
1 parent ca748fb
commit f42ba0f
Showing 1 changed file with 10 additions and 1 deletion.
diff --git a/pxr/imaging/plugin/hdRpr/primvarUtil.h b/pxr/imaging/plugin/hdRpr/primvarUtil.h
@@ -88,12 +88,21 @@ bool HdRprSamplePrimvar(
     VtArray<T>* sampleValuesPtr) {
     std::vector<float> sampleTimes(maxSampleCount);
     std::vector<VtValue> sampleVtValues(maxSampleCount);
-
+    
     size_t authoredSampleCount = sceneDelegate->SamplePrimvar(id, key, maxSampleCount, sampleTimes.data(), sampleVtValues.data());
     if (!authoredSampleCount) {
         return false;
     }
 
+    // for maxSampleCount == 1 and animated scene SamplePrimvar returns 3 frames, and we have to get 2nd one
+    if (maxSampleCount == 1 && authoredSampleCount > 2) {
+        std::vector<float> sampleTimesTmp(authoredSampleCount);
+        std::vector<VtValue> sampleVtValuesTmp(authoredSampleCount);
+        sceneDelegate->SamplePrimvar(id, key, authoredSampleCount, sampleTimesTmp.data(), sampleVtValuesTmp.data());
+        sampleTimes[0] = sampleTimesTmp[1];
+        sampleVtValues[0] = sampleVtValuesTmp[1];
+    }
+
     if (authoredSampleCount < maxSampleCount) {
         sampleTimes.resize(authoredSampleCount);
         sampleVtValues.resize(authoredSampleCount);