Method castRay

Engine/source/environment/river.cpp:1204–1294

}

bool River::castRay(const Point3F &s, const Point3F &e, RayInfo* info)
{
   Point3F start = s;
   Point3F end = e;
   mObjToWorld.mulP(start);
   mObjToWorld.mulP(end);

   F32 out = 1.0f;   // The output fraction/percentage along the line defined by s and e
   VectorF norm(0.0f, 0.0f, 0.0f);     // The normal of the face intersected

   Vector<RiverHitSegment> hitSegments;

   for ( U32 i = 0; i < mSegments.size(); i++ )
   {
      const RiverSegment &segment = mSegments[i];

      F32 t;
      VectorF n;

      if ( segment.worldbounds.collideLine( start, end, &t, &n ) )
      {
         hitSegments.increment();
         hitSegments.last().t = t;
         hitSegments.last().idx = i;         
      }
   }

   dQsort( hitSegments.address(), hitSegments.size(), sizeof(RiverHitSegment), compareHitSegments );

   U32 idx0, idx1, idx2;
   F32 t;

   for ( U32 i = 0; i < hitSegments.size(); i++ )
   {
      U32 segIdx = hitSegments[i].idx;
      const RiverSegment &segment = mSegments[segIdx];

      // Each segment has 6 faces
      for ( U32 j = 0; j < 6; j++ )
      {
         if ( j == 4 && segIdx != 0 )
            continue;

         if ( j == 5 && segIdx != mSegments.size() - 1 )
            continue;

         // Each face has 2 triangles
         for ( U32 k = 0; k < 2; k++ )
         {
            idx0 = gIdxArray[j][k][0];
            idx1 = gIdxArray[j][k][1];
            idx2 = gIdxArray[j][k][2];

            const Point3F &v0 = segment[idx0];
            const Point3F &v1 = segment[idx1];
            const Point3F &v2 = segment[idx2];

            if ( !MathUtils::mLineTriangleCollide( start, end,