OE_utils.cpp

/*
 * Copyright (c) 2015 Tricoire Sebastien 3dsman@free.fr
 *
 * This software is provided 'as-is', without any express or implied
 * warranty.  In no event will the authors be held liable for any damages
 * arising from the use of this software.
 *
 * Permission is granted to anyone to use this software for any purpose,
 * including commercial applications, and to alter it and redistribute it
 * freely, subject to the following restrictions:
 *
 * 1. The origin of this software must not be misrepresented; you must not
 * claim that you wrote the original software. If you use this software
 * in a product, an acknowledgment in the product documentation would be
 * appreciated but is not required.
 * 2. Altered source versions must be plainly marked as such, and must not be
 * misrepresented as being the original software.
 * 3. This notice may not be removed or altered from any source distribution.
 *
 */

#include "OE_utils.h"

BoundingBox::BoundingBox(float minX, float minY, float maxX, float maxY)
{
	min.x = minX;
	min.y = minY;
	max.x = maxX;
	max.y = maxY;
	init = true;
}

const vector_2d& BoundingBox::getMax()
{
	return max;
}
const vector_2d& BoundingBox::getMin()
{
	return min;
}
const vector_2d BoundingBox::getCenter()
{
	return (min+max)/2;
}

void BoundingBox::operator+= (const BoundingBox& box)
{
	if (!box.init)
	{
		return;
	}
	if (!init)
	{
		min = box.min;
		max = box.max;
		init = true;
		return;
	}
	min.x = std::min(min.x,box.min.x);
	min.y = std::min(min.y,box.min.y);
	max.x = std::max(max.x,box.max.x);
	max.y = std::max(max.y,box.max.y);
}

void BoundingBox::operator+= (const vector_2d& point)
{
	if (!init)
	{
		min.x = point.x;
		max.x = point.x;
		min.y = point.y;
		max.y = point.y;
		init = true;
		return;
	}
	min.x = std::min(min.x,point.x);
	min.y = std::min(min.y,point.y);
	max.x = std::max(max.x,point.x);
	max.y = std::max(max.y,point.y);
}

BoundingBox BoundingBox::operator+ (const BoundingBox& box)
{
	if (init)
	{
		if(box.init)
		{
			return BoundingBox(std::min(min.x,box.min.x),std::min(min.y,box.min.y),std::max(max.x,box.max.x),std::max(max.y,box.max.y));
		}
		else
		{
			return BoundingBox(min.x,min.y,max.x,max.y);
		}
	}
	else
	{
		if(box.init)
		{
			return BoundingBox(box.min.x,box.min.y,box.max.x,box.max.y);
		}
	}

	return BoundingBox();
}

BoundingBox BoundingBox::operator+ (const vector_2d& point)
{
	if(init)
	{
		return BoundingBox(std::min(min.x,point.x),std::min(min.y,point.y),std::max(max.x,point.x),std::max(max.y,point.y));
	}
	else
	{
		return BoundingBox(point.x,point.y,point.x,point.y);
	}
}