direct delta mush init

include/igl/direct_delta_mush.cpp

@@ -0,0 +1,63 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2020 Xiangyu Kong <[email protected]>
+//
+// 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 "direct_delta_mush.h"
+
+template <
+  typename DerivedV,
+  typename DerivedF,
+  typename DerivedC,
+  typename DerivedE,
+  typename DerivedT,
+  typename DerivedU>
+IGL_INLINE void direct_delta_mush(
+  const Eigen::MatrixBase<DerivedV> &V,
+  const Eigen::MatrixBase<DerivedF> &F,
+  const Eigen::MatrixBase<DerivedC> &C,
+  const Eigen::MatrixBase<DerivedE> &E,
+  const std::vector<
+    Eigen::Affine3d, Eigen::aligned_allocator<Eigen::Affine3d>> &T,
+  Eigen::PlainObjectBase<DerivedU> &U)
+{
+  return;
+}
+
+template <
+  typename DerivedV,
+  typename DerivedF,
+  typename DerivedC,
+  typename DerivedE,
+  typename DerivedOmega>
+IGL_INLINE void precomputation(
+  const Eigen::MatrixBase<DerivedV> &V,
+  const Eigen::MatrixBase<DerivedF> &F,
+  const Eigen::MatrixBase<DerivedC> &C,
+  const Eigen::MatrixBase<DerivedE> &E,
+  const int p,
+  const typename DerivedV::Scalar lambda,
+  const typename DerivedV::Scalar kappa,
+  Eigen::PlainObjectBase<DerivedOmega> &Omega)
+{
+  return;
+}
+
+template <
+  typename DerivedV,
+  typename DerivedF,
+  typename DerivedC,
+  typename DerivedE,
+  typename DerivedT,
+  typename DerivedOmega,
+  typename DerivedU>
+IGL_INLINE void pose_evaluation(
+  const std::vector<
+    Eigen::Affine3d, Eigen::aligned_allocator<Eigen::Affine3d>> &T,
+  const Eigen::MatrixBase<DerivedOmega> &Omega,
+  Eigen::PlainObjectBase<DerivedU> &U)
+{
+  return;
+}

include/igl/direct_delta_mush.h

@@ -0,0 +1,93 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+//
+// Copyright (C) 2020 Xiangyu Kong <[email protected]>
+//
+// 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/.
+#ifndef IGL_DIRECT_DELTA_MUSH_H
+#define IGL_DIRECT_DELTA_MUSH_H
+
+#include <igl/igl_inline.h>
+
+#include <Eigen/Core>
+#include <Eigen/Geometry>
+#include <vector>
+
+namespace igl {
+  // Computes Direct Delta Mesh Skinning (Variant 0) from "Direct Delta Mush
+  // Skinning and Variants"
+  //
+  // Inputs:
+  //   V  #V by 3 list of rest pose vertex positions
+  //   F  #F by 3 list of triangle indices into rows of V
+  //   C  #C by 3 list of rest pose bone endpoint positions
+  //   E  #T by 2 list of bone edge indices into rows of C
+  //   T  #T list of bone pose transformations
+  // Outputs:
+  //   U  #V by 3 list of output vertex positions
+  template <
+    typename DerivedV,
+    typename DerivedF,
+    typename DerivedC,
+    typename DerivedE,
+    typename DerivedT,
+    typename DerivedU>
+  IGL_INLINE void direct_delta_mush(
+    const Eigen::MatrixBase<DerivedV> &V,
+    const Eigen::MatrixBase<DerivedF> &F,
+    const Eigen::MatrixBase<DerivedC> &C,
+    const Eigen::MatrixBase<DerivedE> &E,
+    const std::vector<
+      Eigen::Affine3d, Eigen::aligned_allocator<Eigen::Affine3d>> &T, /* should eventually be templated more generally than double */
+    Eigen::PlainObjectBase<DerivedU> &U);
+
+  // Precomputation
+  //
+  // Inputs:
+  //   V  #V by 3 list of rest pose vertex positions
+  //   F  #F by 3 list of triangle indices into rows of V
+  //   C  #C by 3 list of rest pose bone endpoint positions
+  //   E  #T by 2 list of bone edge indices into rows of C
+  //   p  number of smoothing iterations
+  //   lambda  smoothing step size
+  //   kappa  smoothness parameter (section 3.3)
+  // Outputs:
+  //   Omega  #V by #T*10 list of precomputated matrix values
+  template <
+    typename DerivedV,
+    typename DerivedF,
+    typename DerivedC,
+    typename DerivedE,
+    typename DerivedOmega>
+  IGL_INLINE void precomputation(
+    const Eigen::MatrixBase<DerivedV> &V,
+    const Eigen::MatrixBase<DerivedF> &F,
+    const Eigen::MatrixBase<DerivedC> &C,
+    const Eigen::MatrixBase<DerivedE> &E,
+    const int p,
+    const typename DerivedV::Scalar lambda,
+    const typename DerivedV::Scalar kappa,
+    Eigen::PlainObjectBase<DerivedOmega> &Omega);
+
+  // Pose evaluation
+  //   Omega  #V by #T*10 list of precomputated matrix values
+  //   T  #T list of bone pose transformations
+  // Outputs:
+  //   U  #V by 3 list of output vertex positions
+  template <
+    typename DerivedV,
+    typename DerivedF,
+    typename DerivedC,
+    typename DerivedE,
+    typename DerivedT,
+    typename DerivedOmega,
+    typename DerivedU>
+  IGL_INLINE void pose_evaluation(
+    const std::vector<
+      Eigen::Affine3d, Eigen::aligned_allocator<Eigen::Affine3d>> &T, /* should eventually be templated more generally than double */
+    const Eigen::MatrixBase<DerivedOmega> &Omega,
+    Eigen::PlainObjectBase<DerivedU> &U);
+} // namespace igl
+
+#endif