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poMatrixSet.cpp
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poMatrixSet.cpp
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/*
* Copyright 2012 Potion Design. All rights reserved.
* This file is part of pocode.
*
* pocode is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as
* published by the Free Software Foundation, either version 3 of
* the License, or (at your option) any later version.
*
* pocode 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with pocode. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "poMatrixSet.h"
#include "poOpenGLState.h"
#include "poApplication.h"
#include <glm/gtc/type_ptr.hpp>
#include <glm/gtc/matrix_transform.hpp>
poMatrixSet::poMatrixSet()
: camType(PO_CAMERA_NONE)
{}
void poMatrixSet::capture() {
projection = po::projection();
modelview = po::modelview();
viewport = po::viewport();
}
poPoint poMatrixSet::globalToLocal(poPoint pt) const {
glm::vec3 p(pt.x, pt.y, pt.z);
glm::vec4 vp(viewport.x, viewport.y, viewport.width, viewport.height);
glm::vec3 r = glm::unProject(p, modelview, projection, vp);
return poPoint(r.x, r.y, r.z);
}
poPoint poMatrixSet::localToGlobal(poPoint pt) const {
glm::vec3 p(pt.x, pt.y, pt.z);
glm::vec4 vp(viewport.x, viewport.y, viewport.width, viewport.height);
glm::vec3 r = glm::project(p, modelview, projection, vp);
return poPoint(r.x, r.y, r.z);
}
poPoint poMatrixSet::localToGlobal2(poPoint pt) const {
return glm::value_ptr(glm::inverse(modelview) * glm::vec4(pt.x,pt.y,pt.z,1.f));
}