59 lines
2.0 KiB
C++
59 lines
2.0 KiB
C++
/* -*-c++-*- */
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/* osgEarth - Geospatial SDK for OpenSceneGraph
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* Copyright 2020 Pelican Mapping
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* http://osgearth.org
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*
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* osgEarth is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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* IN THE SOFTWARE.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>
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*/
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#ifndef OSGEARTHUTIL_CLIPSPACE_H
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#define OSGEARTHUTIL_CLIPSPACE_H
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#include <osgEarth/Common>
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#include <osgEarth/GeoData>
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namespace osgEarth { namespace Util
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{
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/**
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* Utility class for perform operations in clip space
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*/
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class OSGEARTH_EXPORT ClipSpace
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{
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public:
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osg::Matrix _worldToClip, _clipToWorld;
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ClipSpace(const osg::Matrix& MVP, const osg::Matrix& MVPinv);
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// Moves the input point to the bottom edge of the viewport.
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void clampToBottom(GeoPoint& p);
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//! Moves the input point to bottom edge of the viewport
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//! along the vector from eye to p.
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void clampToBottom(GeoPoint& p, const GeoPoint& eye);
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// Moves the input point to left edge of the viewport.
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void clampToLeft(GeoPoint& p);
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//! Moves the input point to left edge of the viewport
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//! along the vector from eye to p.
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void clampToLeft(GeoPoint& p, const GeoPoint& eye);
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};
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} } // namespace osgEarth::Util
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#endif //OSGEARTHUTIL_CLIPSPACE_H
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