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/*
* Copyright 2011, Blender Foundation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#ifndef __UTIL_BOUNDBOX_H__
#define __UTIL_BOUNDBOX_H__
#include <float.h>
#include "util_transform.h"
#include "util_types.h"
CCL_NAMESPACE_BEGIN
class BoundBox
{
public:
float3 min, max;
BoundBox(void)
{
min = make_float3(FLT_MAX, FLT_MAX, FLT_MAX);
max = make_float3(-FLT_MAX, -FLT_MAX, -FLT_MAX);
}
BoundBox(const float3& min_, const float3& max_)
: min(min_), max(max_)
{
}
void grow(const float3& pt)
{
min = ccl::min(min, pt);
max = ccl::max(max, pt);
}
void grow(const BoundBox& bbox)
{
grow(bbox.min);
grow(bbox.max);
}
void intersect(const BoundBox& bbox)
{
min = ccl::max(min, bbox.min);
max = ccl::min(max, bbox.max);
}
float area(void) const
{
if(!valid())
return 0.0f;
float3 d = max - min;
return dot(d, d)*2.0f;
}
bool valid(void) const
{
return (min.x <= max.x) && (min.y <= max.y) && (min.z <= max.z);
}
BoundBox transformed(const Transform *tfm)
{
BoundBox result;
for(int i = 0; i < 8; i++) {
float3 p;
p.x = (i & 1)? min.x: max.x;
p.y = (i & 2)? min.y: max.y;
p.z = (i & 4)? min.z: max.z;
result.grow(transform(tfm, p));
}
return result;
}
};
CCL_NAMESPACE_END
#endif /* __UTIL_BOUNDBOX_H__ */
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