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https://github.com/SoftFever/OrcaSlicer.git
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2ae2672ee9
Fixing dep build script on Windows and removing some warnings. Use bundled igl by default. Not building with the dependency scripts if not explicitly stated. This way, it will stay in Fix the libigl patch to include C source files in header only mode.
78 lines
2.8 KiB
C++
78 lines
2.8 KiB
C++
// This file is part of libigl, a simple c++ geometry processing library.
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//
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// Copyright (C) 2013 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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#ifndef IGL_ARAP_LINEAR_BLOCK_H
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#define IGL_ARAP_LINEAR_BLOCK_H
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#include "igl_inline.h"
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#include <Eigen/Sparse>
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#include <igl/ARAPEnergyType.h>
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namespace igl
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{
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// ARAP_LINEAR_BLOCK constructs a block of the matrix which constructs the
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// linear terms of a given arap energy. When treating rotations as knowns
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// (arranged in a column) then this constructs Kd of K such that the linear
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// portion of the energy is as a column:
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// K * R = [Kx Z ... Ky Z ...
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// Z Kx ... Z Ky ...
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// ... ]
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// These blocks are also used to build the "covariance scatter matrices".
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// Here we want to build a scatter matrix that multiplies against positions
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// (treated as known) producing covariance matrices to fit each rotation.
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// Notice that in the case of the RHS of the poisson solve the rotations are
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// known and the positions unknown, and vice versa for rotation fitting.
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// These linear block just relate the rotations to the positions, linearly in
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// each.
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//
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// Templates:
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// MatV vertex position matrix, e.g. Eigen::MatrixXd
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// MatF face index matrix, e.g. Eigen::MatrixXd
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// Scalar e.g. double
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// Inputs:
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// V #V by dim list of initial domain positions
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// F #F by #simplex size list of triangle indices into V
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// d coordinate of linear constructor to build
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// energy ARAPEnergyType enum value defining which energy is being used.
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// See ARAPEnergyType.h for valid options and explanations.
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// Outputs:
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// Kd #V by #V/#F block of the linear constructor matrix corresponding to
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// coordinate d
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//
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template <typename MatV, typename MatF, typename Scalar>
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IGL_INLINE void arap_linear_block(
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const MatV & V,
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const MatF & F,
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const int d,
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const igl::ARAPEnergyType energy,
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Eigen::SparseMatrix<Scalar> & Kd);
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// Helper functions for each energy type
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template <typename MatV, typename MatF, typename Scalar>
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IGL_INLINE void arap_linear_block_spokes(
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const MatV & V,
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const MatF & F,
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const int d,
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Eigen::SparseMatrix<Scalar> & Kd);
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template <typename MatV, typename MatF, typename Scalar>
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IGL_INLINE void arap_linear_block_spokes_and_rims(
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const MatV & V,
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const MatF & F,
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const int d,
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Eigen::SparseMatrix<Scalar> & Kd);
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template <typename MatV, typename MatF, typename Scalar>
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IGL_INLINE void arap_linear_block_elements(
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const MatV & V,
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const MatF & F,
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const int d,
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Eigen::SparseMatrix<Scalar> & Kd);
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}
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#ifndef IGL_STATIC_LIBRARY
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# include "arap_linear_block.cpp"
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#endif
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#endif
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