GPU Display: Extrapolate tracks only on-demand when first requested

Author: davidrohr

GPU/GPUTracking/display/GPUDisplay.cxx

@@ -633,7 +633,7 @@ void GPUDisplay::DrawGLScene_internal(float animateTime, bool renderToMixBuffer)
     mUpdateDrawCommands = true;
   }
 
-  HighResTimer timerDraw;
+  HighResTimer timerDraw(mUpdateVertexLists);
   if (animateTime < 0 && (mUpdateEventData || mResetScene) && mIOPtrs) {
     timerDraw.ResetStart();
     DrawGLScene_updateEventData();

GPU/GPUTracking/display/GPUDisplay.h

@@ -287,6 +287,7 @@ class GPUDisplay : public GPUDisplayInterface
   volatile bool mUpdateRenderPipeline = false;
   volatile bool mResetScene = false;
   volatile bool mLoadAndShowEvent = false;
+  bool mTracksArePropagated = false;
 
   int32_t mAnimate = 0;
   HighResTimer mAnimationTimer;

GPU/GPUTracking/display/frontend/GPUDisplayKeys.cxx

@@ -493,6 +493,9 @@ void GPUDisplay::HandleKey(uint8_t key)
   if (memcmp((void*)&oldCfgH, (void*)&mCfgH, sizeof(mCfgH)) != 0) {
     mUpdateEventData = true;
   }
+  if (mCfgL.propagateTracks != 0 && !mTracksArePropagated) {
+    mUpdateVertexLists = true;
+  }
   if (memcmp((void*)&oldCfgL, (void*)&mCfgL, sizeof(mCfgL)) != 0 || memcmp((void*)&oldCfgR, (void*)&mCfgR, sizeof(mCfgR)) != 0) {
     mUpdateDrawCommands = true;
   }

GPU/GPUTracking/display/render/GPUDisplayDraw.cxx

@@ -494,6 +494,9 @@ void GPUDisplay::DrawFinal(int32_t iSector, int32_t /*iCol*/, const GPUTPCGMProp
     if (!mIOPtrs->clustersNative) {
       continue;
     }
+    if (mCfgL.propagateTracks == 0) {
+      continue;
+    }
 
     // Propagate track paramters / plot MC tracks
     for (int32_t iMC = 0; iMC < 2; iMC++) {
@@ -989,6 +992,7 @@ size_t GPUDisplay::DrawGLScene_updateVertexList()
     GPUInfo("Display Time: Vertex TOF:\t\t\t%6.0f us", timer.GetCurrentElapsedTime(true) * 1e6);
   }
 
+  mTracksArePropagated = mCfgL.propagateTracks != 0;
   mUpdateVertexLists = false;
   size_t totalVertizes = 0;
   for (int32_t i = 0; i < NSECTORS; i++) {