File size: 2,054 Bytes
5b89cb9 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 | #include <igl/read_triangle_mesh.h>
#include <igl/opengl/glfw/Viewer.h>
#include <igl/opengl/glfw/imgui/ImGuiPlugin.h>
#include <igl/opengl/glfw/imgui/ImGuiMenu.h>
#include <igl/opengl/glfw/imgui/ImGuizmoWidget.h>
#include <GLFW/glfw3.h>
int main(int argc, char *argv[])
{
// Load a mesh from file
Eigen::MatrixXd V;
Eigen::MatrixXi F;
igl::read_triangle_mesh(argc>1?argv[1]: TUTORIAL_SHARED_PATH "/cow.off",V,F);
// Set up viewer
igl::opengl::glfw::Viewer vr;
vr.data().set_mesh(V,F);
igl::opengl::glfw::imgui::ImGuiPlugin imgui_plugin;
vr.plugins.push_back(&imgui_plugin);
// Add a 3D gizmo plugin
igl::opengl::glfw::imgui::ImGuizmoWidget gizmo;
imgui_plugin.widgets.push_back(&gizmo);
// Initialize ImGuizmo at mesh centroid
gizmo.T.block(0,3,3,1) =
0.5*(V.colwise().maxCoeff() + V.colwise().minCoeff()).transpose().cast<float>();
// Update can be applied relative to this remembered initial transform
const Eigen::Matrix4f T0 = gizmo.T;
// Attach callback to apply imguizmo's transform to mesh
gizmo.callback = [&](const Eigen::Matrix4f & T)
{
const Eigen::Matrix4d TT = (T*T0.inverse()).cast<double>().transpose();
vr.data().set_vertices(
(V.rowwise().homogeneous()*TT).rowwise().hnormalized());
vr.data().compute_normals();
};
// Maya-style keyboard shortcuts for operation
vr.callback_key_pressed = [&](decltype(vr) &,unsigned int key, int mod)
{
switch(key)
{
case ' ': gizmo.visible = !gizmo.visible; return true;
case 'W': case 'w': gizmo.operation = ImGuizmo::TRANSLATE; return true;
case 'E': case 'e': gizmo.operation = ImGuizmo::ROTATE; return true;
case 'R': case 'r': gizmo.operation = ImGuizmo::SCALE; return true;
}
return false;
};
igl::opengl::glfw::imgui::ImGuiMenu menu;
imgui_plugin.widgets.push_back(&menu);
std::cout<<R"(
W,w Switch to translate operation
E,e Switch to rotate operation
R,r Switch to scale operation
)";
vr.launch();
}
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