void TerrainImpl::avgFlatten(const Selection& selection, float intensity)
{
// add by 王宏张 2007-7-25
// 计算平均高度
float avgHeiht = 0.0f;
for(Selection::const_iterator iter = selection.begin() ; iter != selection.end() ; ++iter)
{
if(size_t(iter->first.getX() + selection.getPosition().getX()) >= mInfo->getWidth()
|| size_t(iter->first.getY() + selection.getPosition().getY()) >= mInfo->getHeight())
continue;
float height = mInfo->at(size_t(iter->first.getX() + selection.getPosition().getX())
, size_t(iter->first.getY() + selection.getPosition().getY()));
avgHeiht += height;
}
avgHeiht /= selection.size();
for(Selection::const_iterator iter = selection.begin() ; iter != selection.end() ; ++iter)
{
if(size_t(iter->first.getX() + selection.getPosition().getX()) >= mInfo->getWidth()
|| size_t(iter->first.getY() + selection.getPosition().getY()) >= mInfo->getHeight())
continue;
float& height = mInfo->at(size_t(iter->first.getX() + selection.getPosition().getX())
, size_t(iter->first.getY() + selection.getPosition().getY()));
height = avgHeiht; // avgFlatten算法
}
updateTiles(selection.getMin().getX(), selection.getMin().getY(), selection.getMax().getX(), selection.getMax().getY());
}
void TerrainImpl::deform(const Selection& selection, float intensity)
{
for(Selection::const_iterator iter = selection.begin() ; iter != selection.end() ; iter ++)
{
if(size_t(iter->first.getX() + selection.getPosition().getX()) >= mInfo->getWidth()
|| size_t(iter->first.getY() + selection.getPosition().getY()) >= mInfo->getHeight())
continue;
float& height = mInfo->at(size_t(iter->first.getX() + selection.getPosition().getX())
, size_t(iter->first.getY() + selection.getPosition().getY()));
height += intensity * iter->second;
}
updateTiles(selection.getMin().getX(), selection.getMin().getY(), selection.getMax().getX(), selection.getMax().getY());
}
void TerrainImpl::moveSelection(const Selection& selection, float intensity)
{
// add by 王宏张 2007-7-30
// 更新选区
updateTiles(selection.getMin().getX(), selection.getMin().getY(), selection.getMax().getX(), selection.getMax().getY());
}
