#include "toonz/iknode.h"

TPointD DVAPI rotatePoint(TPointD &point, double theta);

// Compute the global position of a single node

void IKNode::computeS(void)

{

	IKNode *y = this->getParent();

	IKNode *w = this;

	s = r; // Initialize to local (relative) position

	while (y) {

		s = rotatePoint(s, y->theta);

		y = y->getParent();

		w = w->getParent();

		s += w->r;

		m_pos = s;

	}

}

void IKNode::setPurpose(Purpose purpose)

{

	m_purpose = purpose;

}

TPointD rotatePoint(TPointD &point, double theta)

{

	double costheta = cos(theta);

	double sintheta = sin(theta);

	double tempx = point.x * costheta - point.y * sintheta;

	point.y = point.y * costheta + point.x * sintheta;

	point.x = tempx;

	return point;

}