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