105 lines
4.4 KiB
C++
105 lines
4.4 KiB
C++
/**************************************************************************************/
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/* */
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/* Visualization Library */
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/* http://visualizationlibrary.org */
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/* */
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/* Copyright (c) 2005-2020, Michele Bosi */
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/* All rights reserved. */
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/* */
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/* Redistribution and use in source and binary forms, with or without modification, */
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/* are permitted provided that the following conditions are met: */
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/* */
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/* - Redistributions of source code must retain the above copyright notice, this */
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/* list of conditions and the following disclaimer. */
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/* */
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/* - Redistributions in binary form must reproduce the above copyright notice, this */
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/* list of conditions and the following disclaimer in the documentation and/or */
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/* other materials provided with the distribution. */
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/* */
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/* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND */
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/* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED */
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/* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE */
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/* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR */
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/* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES */
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/* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; */
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/* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON */
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/* ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT */
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/* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS */
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/* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
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/* */
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/**************************************************************************************/
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#ifndef Frustum_INCLUDE_ONCE
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#define Frustum_INCLUDE_ONCE
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#include <vlCore/Plane.hpp>
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#include <vlCore/AABB.hpp>
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#include <vlCore/Sphere.hpp>
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namespace vl
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{
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//-----------------------------------------------------------------------------
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// Frustum
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//-----------------------------------------------------------------------------
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/**
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* A set of planes defining a frustum used for culling purposes (frustum culling).
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*
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* \sa Camera, Viewport
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*/
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class Frustum: public Object
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{
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VL_INSTRUMENT_CLASS(vl::Frustum, Object)
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public:
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std::vector<Plane>& planes() { return mPlanes; }
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const std::vector<Plane>& planes() const { return mPlanes; }
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void setPlane(unsigned i, const Plane& plane) { VL_CHECK(i<mPlanes.size()); mPlanes[i] = plane; }
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const Plane& plane(unsigned i) const { VL_CHECK(i<mPlanes.size()); return mPlanes[i]; }
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bool cull(const Sphere& sphere) const
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{
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// null spheres are always visible
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if (sphere.isNull())
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return false;
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for(unsigned i=0; i<planes().size(); ++i)
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{
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if ( plane(i).distance(sphere.center()) > sphere.radius() )
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return true;
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}
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return false;
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}
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bool cull(const AABB& aabb) const
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{
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if (aabb.isNull())
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return false;
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for(unsigned i=0; i<planes().size(); ++i)
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{
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if ( plane(i).isOutside(aabb) )
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return true;
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}
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return false;
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}
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bool cull(const std::vector<fvec3>& points) const
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{
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for(unsigned i=0; i<planes().size(); ++i)
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{
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unsigned j=0;
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for(; j<points.size(); ++j)
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if ( plane(i).distance((vec3)points[j]) <= 0 )
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break;
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if(j == points.size())
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return true;
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}
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return false;
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}
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protected:
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std::vector<Plane> mPlanes;
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};
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}
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#endif
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