Method castRayI

Engine/source/terrain/terrCollision.cpp:647–764

}

bool TerrainBlock::castRayI(const Point3F &start, const Point3F &end, RayInfo *info, bool collideEmpty)
{
   lineCount = 0;
   lineStart = start;
   lineEnd = end;

   info->object = this;

   if(start.x == end.x && start.y == end.y)
   {
      if (end.z == start.z)
         return false;

      F32 height;
      if(!getNormalAndHeight(Point2F(start.x, start.y), &info->normal, &height, true))
         return false;

      F32 t = (height - start.z) / (end.z - start.z);
      if(t < 0 || t > 1)
         return false;
      info->t = t;

      return true;
   }

   F32 invBlockWorldSize = 1 / getWorldBlockSize();

   Point3F pStart(start.x * invBlockWorldSize, start.y * invBlockWorldSize, start.z);
   Point3F pEnd(end.x * invBlockWorldSize, end.y * invBlockWorldSize, end.z);

   S32 blockX = (S32)mFloor(pStart.x);
   S32 blockY = (S32)mFloor(pStart.y);

   S32 dx, dy;

   F32 invDeltaX;
   if(pEnd.x == pStart.x)
   {
      calcInterceptX = calcInterceptNone;
      invDeltaX = 0;
      dx = 0;
   }
   else
   {
      invDeltaX = 1 / (pEnd.x - pStart.x);
      calcInterceptX = calcInterceptV;
      if(pEnd.x < pStart.x)
         dx = -1;
      else
         dx = 1;
   }

   F32 invDeltaY;
   if(pEnd.y == pStart.y)
   {
      calcInterceptY = calcInterceptNone;
      invDeltaY = 0;
      dy = 0;