菜鸟学习OGRE和天龙八部之十四: 修正水面算法的一些BUG

/** 
* 种子填充算法,八向连通,用来生成水平面
* @param fillPointY 填充点的y坐标
*/
void ObjectLiquid::boundaryFill4(int x, int z, Real fillPointY)
{
	int index = x + z*(mXSize+1);
	Real currentPiontY = mHeightMapData[index]; // 得到当前点的高度
	// 如果当前点的高度小于水平面,同时没有被标记(防止重复查找)
	if(currentPiontY <= fillPointY && mFlagData[index] == false
		&& x+1 < mXSize+1 && x-1 > 0
		&& z+1 < mZSize+1 && z-1 > 0){
		// 保存该点水深
		mWaterDepthData[index] = (fillPointY - currentPiontY);
		// 标记该点
		mFlagData[index] = true;
		// 继续查找相邻的8个点
		boundaryFill4(x+1, z, fillPointY);
		boundaryFill4(x-1, z, fillPointY);
		boundaryFill4(x, z+1, fillPointY);
		boundaryFill4(x, z-1, fillPointY);
		// 
		boundaryFill4(x-1, z-1, fillPointY);
		boundaryFill4(x+1, z-1, fillPointY);
		boundaryFill4(x-1, z+1, fillPointY);
		boundaryFill4(x+1, z+1, fillPointY);
	}else{ 
		// 边界点也要计算在内
		mFlagData[index] = true;
	}
}