cpbb.h

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/* Copyright (c) 2007 Scott Lembcke
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */
 
typedef struct cpBB{
	cpFloat l, b, r ,t;
} cpBB;

static inline cpBB
cpBBNew(const cpFloat l, const cpFloat b,
		const cpFloat r, const cpFloat t)
{
	cpBB bb = {l, b, r, t};
	return bb;
}

static inline int
cpBBintersects(const cpBB a, const cpBB b)
{
	return (a.l<=b.r && b.l<=a.r && a.b<=b.t && b.b<=a.t);
}

static inline int
cpBBcontainsBB(const cpBB bb, const cpBB other)
{
	return (bb.l < other.l && bb.r > other.r && bb.b < other.b && bb.t > other.t);
}

static inline int
cpBBcontainsVect(const cpBB bb, const cpVect v)
{
	return (bb.l < v.x && bb.r > v.x && bb.b < v.y && bb.t > v.y);
}

cpVect cpBBClampVect(const cpBB bb, const cpVect v); // clamps the vector to lie within the bbox
cpVect cpBBWrapVect(const cpBB bb, const cpVect v); // wrap a vector to a bbox