Method buildConvex

Engine/source/environment/meshRoad.cpp:1636–1861

}

void MeshRoad::buildConvex(const Box3F& box, Convex* convex)
{
   if ( mSlices.size() < 2 )
      return;

   mConvexList->collectGarbage();
   mDebugConvex.clear();

   Box3F realBox = box;
   mWorldToObj.mul(realBox);
   realBox.minExtents.convolveInverse(mObjScale);
   realBox.maxExtents.convolveInverse(mObjScale);

   if (realBox.isOverlapped(getObjBox()) == false)
      return;

   U32 segmentCount = mSegments.size();

   U32 numConvexes ;
   U32 halfConvexes;
   U32 nextSegOffset = 2*mSideProfile.mNodes.size();
   U32 leftSideOffset = nextSegOffset/2;
   U32 k2, capIdx1, capIdx2, capIdx3;

   // Create convex(s) for each segment
   for ( U32 i = 0; i < segmentCount; i++ )
   {
      const MeshRoadSegment &segment = mSegments[i];

      // Is this segment overlapped?
      if ( !segment.getWorldBounds().isOverlapped( box ) )
         continue;

      // Each segment has 6 faces
      for ( U32 j = 0; j < 6; j++ )
      {
         // Only first segment has front face
         if ( j == 4 && i != 0 )
            continue;
         // Only last segment has back face
         if ( j == 5 && i != segmentCount-1 )
            continue;

         // The top and bottom sides have 2 convex(s)
         // The left, right, front, and back sides depend on the user-defined profile
         switch(j)
         {
            case 0:  numConvexes = 2; break;                                     // Top
            case 1:                                                              // Left
            case 2:  numConvexes = 2* (mSideProfile.mNodes.size()-1); break;     // Right
            case 3:  numConvexes = 2; break;                                     // Bottom
            case 4:                                                              // Front
            case 5:  numConvexes = mSideProfile.mCap.getNumTris(); break;        // Back
            default: numConvexes = 0;
         }

         halfConvexes = numConvexes/2;