C++ (Cpp) Vec2D::distanceToSquared示例

toxi::geom::Vec2D toxi::geom::Polygon2D::getClosestPointTo( Vec2D & p )
{
	float minD = FLT_MAX;
	Vec2D q = Vec2D();
	for (Line2D l : getEdges()) 
	{
		Vec2D c = l.closestPointTo(p);
		float d = static_cast< float > ( c.distanceToSquared( p ) );
		if (d < minD) 
		{
			q = c;
			minD = d;
		}
	}
	return q;
}

示例#2

显示文件

文件： Polygon2D.cpp 项目： Jornason/ofxToxiclibs

toxi::geom::Polygon2D * toxi::geom::Polygon2D::reduceVertices( const float & mel )
{
	float minEdgeLength = mel * mel;
	std::vector<Vec2D> reduced;
	Vec2D prev = vertices.at(0);
	reduced.push_back(prev);
	int num = vertices.size() - 1;
	for (int i = 1; i < num; i++) 
	{
		Vec2D v = vertices.at(i);
		if (prev.distanceToSquared( v ) >= minEdgeLength) 
		{
			reduced.push_back(v);
			prev = v;
		}
	}
	if (vertices.at(0).distanceToSquared( vertices.at(num)) >= minEdgeLength) 
	{
		reduced.push_back(vertices.at(num));
	}
	vertices = reduced;
	return this;
}