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// This file is part of libigl, a simple c++ geometry processing library.
//
// Copyright (C) 2015 Alec Jacobson <alecjacobson@gmail.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License
// v. 2.0. If a copy of the MPL was not distributed with this file, You can
// obtain one at http://mozilla.org/MPL/2.0/.
#include "frustum.h"
template < typename DerivedP>
IGL_INLINE void igl::frustum(
const typename DerivedP::Scalar left,
const typename DerivedP::Scalar right,
const typename DerivedP::Scalar bottom,
const typename DerivedP::Scalar top,
const typename DerivedP::Scalar nearVal,
const typename DerivedP::Scalar farVal,
Eigen::PlainObjectBase<DerivedP> & P)
{
P.setConstant(4,4,0.);
P(0,0) = (2.0 * nearVal) / (right - left);
P(1,1) = (2.0 * nearVal) / (top - bottom);
P(0,2) = (right + left) / (right - left);
P(1,2) = (top + bottom) / (top - bottom);
P(2,2) = -(farVal + nearVal) / (farVal - nearVal);
P(3,2) = -1.0;
P(2,3) = -(2.0 * farVal * nearVal) / (farVal - nearVal);
}
#ifdef IGL_STATIC_LIBRARY
// Explicit template instantiation
// generated by autoexplicit.sh
template void igl::frustum<Eigen::Matrix<float, 4, 4, 0, 4, 4> >(Eigen::Matrix<float, 4, 4, 0, 4, 4>::Scalar, Eigen::Matrix<float, 4, 4, 0, 4, 4>::Scalar, Eigen::Matrix<float, 4, 4, 0, 4, 4>::Scalar, Eigen::Matrix<float, 4, 4, 0, 4, 4>::Scalar, Eigen::Matrix<float, 4, 4, 0, 4, 4>::Scalar, Eigen::Matrix<float, 4, 4, 0, 4, 4>::Scalar, Eigen::PlainObjectBase<Eigen::Matrix<float, 4, 4, 0, 4, 4> >&);
#endif
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