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Diffstat (limited to 'intern/cycles/util/util_boundbox.h')
-rw-r--r-- | intern/cycles/util/util_boundbox.h | 98 |
1 files changed, 98 insertions, 0 deletions
diff --git a/intern/cycles/util/util_boundbox.h b/intern/cycles/util/util_boundbox.h new file mode 100644 index 00000000000..34cc1d6e11c --- /dev/null +++ b/intern/cycles/util/util_boundbox.h @@ -0,0 +1,98 @@ +/* + * 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__ */ + |