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/******* COPYRIGHT ************************************************
* *
* FlowVR Render *
* Parallel Rendering Library *
* *
*-----------------------------------------------------------------*
* COPYRIGHT (C) 2005 by *
* Laboratoire Informatique et Distribution (UMR5132) and *
* INRIA Project MOVI. ALL RIGHTS RESERVED. *
* *
* This source is covered by the GNU LGPL, please refer to the *
* COPYING-LIB file for further information. *
* *
*-----------------------------------------------------------------*
* *
* Original Contributors: *
* Jeremie Allard, *
* Clement Menier. *
* *
*******************************************************************
* *
* File: ./include/flowvr/render/bbox.h *
* *
* Contacts: *
* *
******************************************************************/
#ifndef FLOWVR_RENDER_BBOX_H
#define FLOWVR_RENDER_BBOX_H
#include <ftl/vec.h>
#include <ftl/mat.h>
#include <iostream>
namespace flowvr
{
namespace render
{
class BBox
{
public:
ftl::Vec3f a,b;
BBox();
BBox(const ftl::Vec3f& _a,const ftl::Vec3f& _b);
bool isEmpty() const;
void clear();
BBox& operator+=(const BBox& p);
BBox& operator+=(const ftl::Vec3f& p);
BBox operator+(const BBox& p);
void apply(const BBox& p,const ftl::Mat4x4f& m);
BBox operator*(const ftl::Mat4x4f& m);
float size() const
{
if (isEmpty()) return 0;
ftl::Vec3f v=b-a;
return v.norm();
}
bool in(const ftl::Vec3f& p) const
{
return (p.x()>=a.x() && p.x()<=b.x() && p.y()>=a.y() && p.y()<=b.y() && p.z()>=a.z() && p.z()<=b.z());
}
bool in(const BBox& bb) const
{
return (bb.b.x()>=a.x() && bb.a.x()<=b.x() && bb.b.y()>=a.y() && bb.a.y()<=b.y() && bb.b.z()>=a.z() && bb.a.z()<=b.z());
}
/// Test if bbox intersect with half-space defined as eq.P >= 0
bool inHalfspace(const ftl::Vec4f& eq) const;
/// Test if bbox intersect with frustum defined by the given matrix
/// (interpreted as an OpenGL projection matrix)
/// if exact is false then the result is overestimated
/// if exact is true then a 3x3 matrix inversion is required
bool inFrustum(const ftl::Mat4x4f& frustum, bool exact=false) const;
bool operator==(const BBox& p) const
{
return a==p.a && b==p.b;
}
bool operator!=(const BBox& p) const
{
return a!=p.a || b!=p.b;
}
std::string toString() const;
void fromString(const std::string& text);
};
} // namespace render
} // namespace flowvr
// iostream
std::ostream& operator<<(std::ostream& o, const flowvr::render::BBox& b);
std::istream& operator>>(std::istream& in, flowvr::render::BBox& b);
#endif
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