Building igl statically and moving to the dep scripts

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.

src/libigl/igl/swept_volume_signed_distance.cpp

@@ -0,0 +1,122 @@
+// This file is part of libigl, a simple c++ geometry processing library.
+// 
+// Copyright (C) 2016 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 "swept_volume_signed_distance.h"
+#include "LinSpaced.h"
+#include "flood_fill.h"
+#include "signed_distance.h"
+#include "AABB.h"
+#include "pseudonormal_test.h"
+#include "per_face_normals.h"
+#include "per_vertex_normals.h"
+#include "per_edge_normals.h"
+#include <Eigen/Geometry>
+#include <cmath>
+#include <algorithm>
+
+IGL_INLINE void igl::swept_volume_signed_distance(
+  const Eigen::MatrixXd & V,
+  const Eigen::MatrixXi & F,
+  const std::function<Eigen::Affine3d(const double t)> & transform,
+  const size_t & steps,
+  const Eigen::MatrixXd & GV,
+  const Eigen::RowVector3i & res,
+  const double h,
+  const double isolevel,
+  const Eigen::VectorXd & S0,
+  Eigen::VectorXd & S)
+{
+  using namespace std;
+  using namespace igl;
+  using namespace Eigen;
+  S = S0;
+  const VectorXd t = igl::LinSpaced<VectorXd >(steps,0,1);
+  const bool finite_iso = isfinite(isolevel);
+  const double extension = (finite_iso ? isolevel : 0) + sqrt(3.0)*h;
+  Eigen::AlignedBox3d box(
+    V.colwise().minCoeff().array()-extension,
+    V.colwise().maxCoeff().array()+extension);
+  // Precomputation
+  Eigen::MatrixXd FN,VN,EN;
+  Eigen::MatrixXi E;
+  Eigen::VectorXi EMAP;
+  per_face_normals(V,F,FN);
+  per_vertex_normals(V,F,PER_VERTEX_NORMALS_WEIGHTING_TYPE_ANGLE,FN,VN);
+  per_edge_normals(
+    V,F,PER_EDGE_NORMALS_WEIGHTING_TYPE_UNIFORM,FN,EN,E,EMAP);
+  AABB<MatrixXd,3> tree;
+  tree.init(V,F);
+  for(int ti = 0;ti<t.size();ti++)
+  {
+    const Affine3d At = transform(t(ti));
+    for(int g = 0;g<GV.rows();g++)
+    {
+      // Don't bother finding out how deep inside points are.
+      if(finite_iso && S(g)==S(g) && S(g)<isolevel-sqrt(3.0)*h)
+      {
+        continue;
+      }
+      const RowVector3d gv = 
+        (GV.row(g) - At.translation().transpose())*At.linear();
+      // If outside of extended box, then consider it "far away enough"
+      if(finite_iso && !box.contains(gv.transpose()))
+      {
+        continue;
+      }
+      RowVector3d c,n;
+      int i;
+      double sqrd,s;
+      //signed_distance_pseudonormal(tree,V,F,FN,VN,EN,EMAP,gv,s,sqrd,i,c,n);
+      const double min_sqrd = 
+        finite_iso ? 
+        pow(sqrt(3.)*h+isolevel,2) : 
+        numeric_limits<double>::infinity();
+      sqrd = tree.squared_distance(V,F,gv,min_sqrd,i,c);
+      if(sqrd<min_sqrd)
+      {
+        pseudonormal_test(V,F,FN,VN,EN,EMAP,gv,i,c,s,n);
+        if(S(g) == S(g))
+        {
+          S(g) = std::min(S(g),s*sqrt(sqrd));
+        }else
+        {
+          S(g) = s*sqrt(sqrd);
+        }
+      }
+    }
+  }
+
+  if(finite_iso)
+  {
+    flood_fill(res,S);
+  }else
+  {
+#ifndef NDEBUG
+    // Check for nans
+    std::for_each(S.data(),S.data()+S.size(),[](const double s){assert(s==s);});
+#endif
+  }
+}
+
+IGL_INLINE void igl::swept_volume_signed_distance(
+  const Eigen::MatrixXd & V,
+  const Eigen::MatrixXi & F,
+  const std::function<Eigen::Affine3d(const double t)> & transform,
+  const size_t & steps,
+  const Eigen::MatrixXd & GV,
+  const Eigen::RowVector3i & res,
+  const double h,
+  const double isolevel,
+  Eigen::VectorXd & S)
+{
+  using namespace std;
+  using namespace igl;
+  using namespace Eigen;
+  S = VectorXd::Constant(GV.rows(),1,numeric_limits<double>::quiet_NaN());
+  return 
+    swept_volume_signed_distance(V,F,transform,steps,GV,res,h,isolevel,S,S);
+}