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125 lines
3.2 KiB
125 lines
3.2 KiB
#include <igl/colon.h>
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#include <igl/harmonic.h>
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#include <igl/readOBJ.h>
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#include <igl/readDMAT.h>
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#include <igl/opengl/glfw/Viewer.h>
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#include <algorithm>
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#include <iostream>
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double bc_frac = 1.0;
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double bc_dir = -0.03;
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bool deformation_field = false;
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Eigen::MatrixXd V,U,V_bc,U_bc;
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Eigen::VectorXd Z;
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Eigen::MatrixXi F;
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Eigen::VectorXi b;
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bool pre_draw(igl::opengl::glfw::Viewer & viewer)
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{
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using namespace Eigen;
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// Determine boundary conditions
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if(viewer.core().is_animating)
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{
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bc_frac += bc_dir;
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bc_dir *= (bc_frac>=1.0 || bc_frac<=0.0?-1.0:1.0);
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}
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const MatrixXd U_bc_anim = V_bc+bc_frac*(U_bc-V_bc);
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if(deformation_field)
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{
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MatrixXd D;
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MatrixXd D_bc = U_bc_anim - V_bc;
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igl::harmonic(V,F,b,D_bc,2,D);
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U = V+D;
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}else
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{
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igl::harmonic(V,F,b,U_bc_anim,2.,U);
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}
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viewer.data().set_vertices(U);
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viewer.data().compute_normals();
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return false;
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}
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bool key_down(igl::opengl::glfw::Viewer &viewer, unsigned char key, int mods)
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{
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switch(key)
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{
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case ' ':
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viewer.core().is_animating = !viewer.core().is_animating;
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return true;
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case 'D':
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case 'd':
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deformation_field = !deformation_field;
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return true;
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}
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return false;
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}
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int main(int argc, char *argv[])
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{
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using namespace Eigen;
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using namespace std;
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igl::readOBJ(TUTORIAL_SHARED_PATH "/decimated-max.obj",V,F);
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U=V;
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// S(i) = j: j<0 (vertex i not in handle), j >= 0 (vertex i in handle j)
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VectorXi S;
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igl::readDMAT(TUTORIAL_SHARED_PATH "/decimated-max-selection.dmat",S);
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igl::colon<int>(0,V.rows()-1,b);
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b.conservativeResize(stable_partition( b.data(), b.data()+b.size(),
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[&S](int i)->bool{return S(i)>=0;})-b.data());
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// Boundary conditions directly on deformed positions
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U_bc.resize(b.size(),V.cols());
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V_bc.resize(b.size(),V.cols());
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for(int bi = 0;bi<b.size();bi++)
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{
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V_bc.row(bi) = V.row(b(bi));
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switch(S(b(bi)))
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{
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case 0:
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// Don't move handle 0
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U_bc.row(bi) = V.row(b(bi));
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break;
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case 1:
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// move handle 1 down
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U_bc.row(bi) = V.row(b(bi)) + RowVector3d(0,-50,0);
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break;
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case 2:
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default:
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// move other handles forward
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U_bc.row(bi) = V.row(b(bi)) + RowVector3d(0,0,-25);
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break;
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}
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}
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// Pseudo-color based on selection
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MatrixXd C(F.rows(),3);
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RowVector3d purple(80.0/255.0,64.0/255.0,255.0/255.0);
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RowVector3d gold(255.0/255.0,228.0/255.0,58.0/255.0);
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for(int f = 0;f<F.rows();f++)
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{
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if( S(F(f,0))>=0 && S(F(f,1))>=0 && S(F(f,2))>=0)
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{
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C.row(f) = purple;
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}else
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{
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C.row(f) = gold;
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}
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}
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// Plot the mesh with pseudocolors
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igl::opengl::glfw::Viewer viewer;
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viewer.data().set_mesh(U, F);
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viewer.data().show_lines = false;
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viewer.data().set_colors(C);
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viewer.core().trackball_angle = Eigen::Quaternionf(sqrt(2.0),0,sqrt(2.0),0);
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viewer.core().trackball_angle.normalize();
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viewer.callback_pre_draw = &pre_draw;
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viewer.callback_key_down = &key_down;
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//viewer.core().is_animating = true;
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viewer.core().animation_max_fps = 30.;
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cout<<
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"Press [space] to toggle deformation."<<endl<<
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"Press 'd' to toggle between biharmonic surface or displacements."<<endl;
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viewer.launch();
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}
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