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/** \file blender/freestyle/intern/view_map/Functions1D.cpp
 *  \ingroup freestyle
 *  \brief Functions taking 1D input
 *  \author Stephane Grabli
 *  \author Emmanuel Turquin
 *  \date 01/07/2003
 */

#include "Functions1D.h"

using namespace std;

namespace Freestyle {

namespace Functions1D {

int GetXF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int GetYF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int GetZF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int GetProjectedXF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int GetProjectedYF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int GetProjectedZF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int Orientation2DF1D::operator()(Interface1D& inter)
{
	FEdge *fe = dynamic_cast<FEdge*>(&inter);
	if (fe) {
		Vec3r res = fe->orientation2d();
		result = Vec2f(res[0], res[1]);
	}
	else {
		result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	}
	return 0;
}

int Orientation3DF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int ZDiscontinuityF1D::operator()(Interface1D& inter)
{
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int QuantitativeInvisibilityF1D::operator()(Interface1D& inter)
{
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		result = ve->qi();
		return 0;
	}
	FEdge *fe = dynamic_cast<FEdge*>(&inter);
	if (fe) {
		result = ve->qi();
		return 0;
	}
	result = integrate(_func, inter.verticesBegin(), inter.verticesEnd(), _integration);
	return 0;
}

int CurveNatureF1D::operator()(Interface1D& inter)
{
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		result = ve->getNature();
	}
	else {
		// we return a nature that contains every natures of the viewedges spanned by the chain.
		Nature::EdgeNature nat = Nature::NO_FEATURE;
		Interface0DIterator it = inter.verticesBegin();
		while (!it.isEnd()) {
			nat |= _func(it);
			++it;
		}
		result = nat;
	}
	return 0;
}

int TimeStampF1D::operator()(Interface1D& inter)
{
	TimeStamp *timestamp = TimeStamp::instance();
	inter.setTimeStamp(timestamp->getTimeStamp());
	return 0;
}

int ChainingTimeStampF1D::operator()(Interface1D& inter)
{
	TimeStamp *timestamp = TimeStamp::instance();
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve)
		ve->setChainingTimeStamp(timestamp->getTimeStamp());
	return 0;
}

int IncrementChainingTimeStampF1D::operator()(Interface1D& inter)
{
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve)
		ve->setChainingTimeStamp(ve->getChainingTimeStamp() + 1);
	return 0;
}

int GetShapeF1D::operator()(Interface1D& inter)
{
	vector<ViewShape*> shapesVector;
	set<ViewShape*> shapesSet;
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		shapesVector.push_back(ve->viewShape());
	}
	else {
		Interface0DIterator it = inter.verticesBegin(), itend = inter.verticesEnd();
		for (; it != itend; ++it)
			shapesSet.insert(Functions0D::getShapeF0D(it));
		shapesVector.insert<set<ViewShape*>::iterator>(shapesVector.begin(), shapesSet.begin(), shapesSet.end());
	}
	result = shapesVector;
	return 0;
}

int GetOccludersF1D::operator()(Interface1D& inter)
{
	vector<ViewShape*> shapesVector;
	set<ViewShape*> shapesSet;
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		result = ve->occluders();
	}
	else {
		Interface0DIterator it = inter.verticesBegin(), itend = inter.verticesEnd();
		for (; it != itend; ++it) {
			Functions0D::getOccludersF0D(it, shapesSet);
		}
		shapesVector.insert(shapesVector.begin(), shapesSet.begin(), shapesSet.end());
		result = shapesVector;
	}
	return 0;
}

int GetOccludeeF1D::operator()(Interface1D& inter)
{
	vector<ViewShape*> shapesVector;
	set<ViewShape*> shapesSet;
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		ViewShape *aShape = ve->aShape();
		if (aShape) {
			shapesVector.push_back(aShape);
		}
	}
	else {
		Interface0DIterator it = inter.verticesBegin(), itend = inter.verticesEnd();
		for (; it != itend; ++it) {
			shapesSet.insert(Functions0D::getOccludeeF0D(it));
		}
		shapesVector.insert<set<ViewShape*>::iterator>(shapesVector.begin(), shapesSet.begin(), shapesSet.end());
	}
	result = shapesVector;
	return 0;
}

// Internal
////////////

void getOccludeeF1D(Interface1D& inter, set<ViewShape*>& oShapes)
{
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		ViewShape *aShape = ve->aShape();
		if (aShape == 0) {
			oShapes.insert((ViewShape*)0);
			return;
		}
		oShapes.insert(aShape);
	}
	else {
		Interface0DIterator it = inter.verticesBegin(), itend = inter.verticesEnd();
		for (; it != itend; ++it)
			oShapes.insert(Functions0D::getOccludeeF0D(it));
	}
}

void getOccludersF1D(Interface1D& inter, set<ViewShape*>& oShapes)
{
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		vector<ViewShape*>& occluders = ve->occluders();
		oShapes.insert<vector<ViewShape*>::iterator>(occluders.begin(), occluders.end());
	}
	else {
		Interface0DIterator it = inter.verticesBegin(), itend = inter.verticesEnd();
		for (; it != itend; ++it) {
			set<ViewShape*> shapes;
			Functions0D::getOccludersF0D(it, shapes);
			for (set<ViewShape*>::iterator s = shapes.begin(), send = shapes.end(); s != send; ++s)
				oShapes.insert(*s);
		}
	}
}

void getShapeF1D(Interface1D& inter, set<ViewShape*>& oShapes)
{
	ViewEdge *ve = dynamic_cast<ViewEdge*>(&inter);
	if (ve) {
		oShapes.insert(ve->viewShape());
	}
	else {
		Interface0DIterator it = inter.verticesBegin(), itend = inter.verticesEnd();
		for (; it != itend; ++it)
			oShapes.insert(Functions0D::getShapeF0D(it));
	}
}

} // end of namespace Functions1D

} /* namespace Freestyle */