Method _paint

Engine/source/forest/editor/forestBrushTool.cpp:345–492

}

void ForestBrushTool::_paint( const Point3F &point )
{
   AssertFatal( mForest, "ForestBrushTool::_paint() - Can't paint without a Forest!" );

   if ( mElements.empty() )
      return;

   // Iterators, pointers, and temporaries.
   ForestBrushElement *pElement;
   ForestItemData *pData;
   F32 radius, area;
   
   // How much area do we have to fill with trees ( within the brush ).
   F32 fillArea = mCircleArea( mSize );

   // Scale that down by pressure, this is how much area we want to fill.
   fillArea *= mPressure;

   // Create an MRandomSet we can get items we are painting out of with
   // the desired distribution.
   // Also grab the smallest and largest radius elements while we are looping.
   
   ForestBrushElement *smallestElement, *largestElement;
   smallestElement = largestElement = mElements[0];

   MRandomSet<ForestBrushElement*> randElementSet(&mRandom);

   for ( S32 i = 0; i < mElements.size(); i++ )
   {
      pElement = mElements[i];

      if ( pElement->mData->mRadius > largestElement->mData->mRadius )
         largestElement = pElement;
      if ( pElement->mData->mRadius < smallestElement->mData->mRadius )
         smallestElement = pElement;

      randElementSet.add( pElement, pElement->mProbability );
   }
   
   // Pull elements from the random set until we would theoretically fill
   // the desired area.

   F32 areaLeft = fillArea;
   F32 scaleFactor, sink, randRot, worldCoordZ, slope;
   Point2F worldCoords;
   Point3F normalVector, right;
   Point2F temp;

   const S32 MaxTries = 5;


   while ( areaLeft > 0.0f )
   {
      pElement = randElementSet.get();
      pData = pElement->mData;

      scaleFactor =  mLerp( pElement->mScaleMin, pElement->mScaleMax, mClampF( mPow( mRandom.randF(), pElement->mScaleExponent ), 0.0f, 1.0f ) );
      radius = getMax( pData->mRadius * scaleFactor, 0.1f );