include/cinder/AxisAlignedBox.h
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00001 /*
00002  Copyright (c) 2010, The Cinder Project: http://libcinder.org
00003  All rights reserved.
00004 
00005  Redistribution and use in source and binary forms, with or without modification, are permitted provided that
00006  the following conditions are met:
00007 
00008     * Redistributions of source code must retain the above copyright notice, this list of conditions and
00009     the following disclaimer.
00010     * Redistributions in binary form must reproduce the above copyright notice, this list of conditions and
00011     the following disclaimer in the documentation and/or other materials provided with the distribution.
00012 
00013  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED
00014  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00015  PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
00016  ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
00017  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00018  HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00019  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
00020  POSSIBILITY OF SUCH DAMAGE.
00021 */
00022 
00023 #pragma once
00024 
00025 #include "cinder/Matrix.h"
00026 #include "cinder/Ray.h"
00027 #include "cinder/Vector.h"
00028 
00029 namespace cinder {
00030 
00031 class AxisAlignedBox3f {
00032  public:
00033     AxisAlignedBox3f() {}
00034     AxisAlignedBox3f( const Vec3f &aMin, const Vec3f &aMax );
00035 
00036     bool    intersects( const Ray &ray );
00037     int     intersect( const Ray &ray, float intersections[2] );
00038 
00039     Vec3f           getCenter() const { return ( mExtents[1] + mExtents[0] ) * 0.5f; }
00040     Vec3f           getSize() const { return mExtents[1] - mExtents[0]; }
00041 
00043     void            include( const AxisAlignedBox3f &box );
00044     
00045     const Vec3f&    getMin() const { return mExtents[0]; }
00046     const Vec3f&    getMax() const { return mExtents[1]; }
00047 
00049     Vec3f   getNegative( const Vec3f &normal ) const;
00050     Vec3f   getPositive( const Vec3f &normal ) const;
00051 
00053     AxisAlignedBox3f transformed( const Matrix44f &transform ) const;
00054     
00055     static bool calcTriangleIntersection( const Ray &ray, const Vec3f &vert0, const Vec3f &vert1, const Vec3f &vert2, float *result );
00056 
00057  protected:
00058     Vec3f mExtents[2];
00059     Vec3f mVerts[8];
00060 };
00061 
00062 } // namespace cinder