729 lines
17 KiB
C++
729 lines
17 KiB
C++
// Small GLUT application to test different scene rotation paradigms
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//
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#include <igl/readOBJ.h>
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#include <igl/writeOBJ.h>
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#include <igl/writeOFF.h>
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#include <igl/readWRL.h>
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#include <igl/report_gl_error.h>
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#include <igl/triangulate.h>
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#include <igl/readOFF.h>
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#include <igl/readMESH.h>
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#include <igl/draw_mesh.h>
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#include <igl/draw_floor.h>
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#include <igl/pathinfo.h>
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#include <igl/list_to_matrix.h>
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#include <igl/quat_to_mat.h>
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#include <igl/per_face_normals.h>
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#include <igl/material_colors.h>
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#include <igl/trackball.h>
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#include <igl/snap_to_canonical_view_quat.h>
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#include <igl/REDRUM.h>
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#include <igl/Camera.h>
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#include <igl/ReAntTweakBar.h>
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#include <igl/get_seconds.h>
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#include <igl/jet.h>
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#include <igl/randperm.h>
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#include <igl/normalize_row_lengths.h>
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#include <igl/boost/components.h>
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#include <igl/boost/bfs_orient.h>
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#include <igl/orient_outward.h>
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#include <Eigen/Core>
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#include <Eigen/Geometry>
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#include <GLUT/glut.h>
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#include <ctime>
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#include <string>
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#include <vector>
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#include <stack>
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#include <iostream>
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Eigen::MatrixXd V;
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Eigen::VectorXd Vmid,Vmin,Vmax;
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double bbd = 1.0;
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Eigen::MatrixXi F;
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Eigen::VectorXi CC;
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struct State
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{
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igl::Camera camera;
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Eigen::MatrixXd N;
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Eigen::MatrixXd C;
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} s;
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// See README for descriptions
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enum RotationType
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{
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ROTATION_TYPE_IGL_TRACKBALL = 0,
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ROTATION_TYPE_TWO_AXIS_VALUATOR_FIXED_UP = 1,
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NUM_ROTATION_TYPES = 2,
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} rotation_type;
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std::stack<State> undo_stack;
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std::stack<State> redo_stack;
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bool wireframe_visible = false;
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bool fill_visible = true;
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bool is_rotating = false;
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int down_x,down_y;
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igl::Camera down_camera;
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bool is_animating = false;
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double animation_start_time = 0;
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double ANIMATION_DURATION = 0.5;
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Eigen::Quaterniond animation_from_quat;
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Eigen::Quaterniond animation_to_quat;
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int width,height;
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Eigen::Vector4f light_pos(-0.1,-0.1,0.9,0);
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#define REBAR_NAME "temp.rbr"
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igl::ReTwBar rebar;
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void push_undo()
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{
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undo_stack.push(s);
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// Clear
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redo_stack = std::stack<State>();
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}
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void TW_CALL set_camera_rotation(const void * value, void *clientData)
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{
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using namespace std;
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// case current value to double
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const double * quat = (const double *)(value);
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std::copy(quat,quat+4,s.camera.rotation);
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}
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void TW_CALL set_rotation_type(const void * value, void * clientData)
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{
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using namespace Eigen;
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using namespace std;
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using namespace igl;
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const RotationType old_rotation_type = rotation_type;
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rotation_type = *(const RotationType *)(value);
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if(rotation_type == ROTATION_TYPE_TWO_AXIS_VALUATOR_FIXED_UP &&
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old_rotation_type != ROTATION_TYPE_TWO_AXIS_VALUATOR_FIXED_UP)
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{
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push_undo();
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copy(s.camera.rotation,s.camera.rotation+4,animation_from_quat.coeffs().data());
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const Vector3d up = animation_from_quat.matrix() * Vector3d(0,1,0);
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Vector3d proj_up(0,up(1),up(2));
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if(proj_up.norm() == 0)
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{
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proj_up = Vector3d(0,1,0);
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}
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proj_up.normalize();
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Quaterniond dq;
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dq = Quaterniond::FromTwoVectors(up,proj_up);
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animation_to_quat = dq * animation_from_quat;
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// start animation
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animation_start_time = get_seconds();
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is_animating = true;
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}
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}
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void TW_CALL get_rotation_type(void * value, void *clientData)
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{
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RotationType * rt = (RotationType *)(value);
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*rt = rotation_type;
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}
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void TW_CALL get_camera_rotation(void * value, void *clientData)
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{
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using namespace std;
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// case current value to double
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double * quat = (double *)(value);
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std::copy(s.camera.rotation,s.camera.rotation+4,quat);
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}
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void reshape(int width, int height)
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{
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::width = width;
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::height = height;
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glViewport(0,0,width,height);
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// Send the new window size to AntTweakBar
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TwWindowSize(width, height);
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}
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void push_scene()
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{
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using namespace igl;
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using namespace std;
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const double angle = s.camera.angle;
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glMatrixMode(GL_PROJECTION);
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glPushMatrix();
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glLoadIdentity();
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double zNear = 1e-2;
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double zFar = 100;
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double aspect = ((double)width)/((double)height);
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// Amount of scaling needed to "fix" perspective z-shift
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double z_fix = 1.0;
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// 5 is far enough to see unit "things" well
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const double camera_z = 2;
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// Test if should be using true orthographic projection
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if(angle == 0)
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{
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glOrtho(
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-0.5*camera_z*aspect,
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0.5*camera_z*aspect,
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-0.5*camera_z,
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0.5*camera_z,
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zNear,
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zFar);
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}else
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{
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// Make sure aspect is sane
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aspect = aspect < 0.01 ? 0.01 : aspect;
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gluPerspective(angle,aspect,zNear,zFar);
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z_fix = 2.*tan(angle/2./360.*2.*M_PI);
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}
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glMatrixMode(GL_MODELVIEW);
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glPushMatrix();
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glLoadIdentity();
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gluLookAt(0,0,camera_z,0,0,0,0,1,0);
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// Adjust scale to correct perspective
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glScaled(z_fix,z_fix,z_fix);
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// scale, pan
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glScaled( s.camera.zoom, s.camera.zoom, s.camera.zoom);
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double mat[4*4];
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quat_to_mat(s.camera.rotation,mat);
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glMultMatrixd(mat);
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}
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void push_object()
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{
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using namespace igl;
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glPushMatrix();
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glScaled(2./bbd,2./bbd,2./bbd);
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glTranslated(-Vmid(0),-Vmid(1),-Vmid(2));
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}
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void pop_object()
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{
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glPopMatrix();
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}
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void pop_scene()
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{
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glMatrixMode(GL_PROJECTION);
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glPopMatrix();
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glMatrixMode(GL_MODELVIEW);
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glPopMatrix();
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}
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// Set up double-sided lights
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void lights()
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{
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using namespace std;
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using namespace Eigen;
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glEnable(GL_LIGHTING);
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//glLightModelf(GL_LIGHT_MODEL_TWO_SIDE,GL_TRUE);
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glEnable(GL_LIGHT0);
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float WHITE[4] = {1,1,1,1.};
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float GREY[4] = {0.4,0.4,0.4,1.};
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float BLACK[4] = {0.,0.,0.,1.};
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float NEAR_BLACK[4] = {0.1,0.1,0.1,1.};
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Vector4f pos = light_pos;
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glLightfv(GL_LIGHT0,GL_AMBIENT,BLACK);
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glLightfv(GL_LIGHT0,GL_DIFFUSE,WHITE);
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glLightfv(GL_LIGHT0,GL_SPECULAR,BLACK);
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glLightfv(GL_LIGHT0,GL_POSITION,pos.data());
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//glEnable(GL_LIGHT1);
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//pos(0) *= -1;
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//pos(1) *= -1;
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//pos(2) *= -1;
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//glLightfv(GL_LIGHT1,GL_AMBIENT,BLACK);
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//glLightfv(GL_LIGHT1,GL_DIFFUSE,NEAR_BLACK);
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//glLightfv(GL_LIGHT1,GL_SPECULAR,BLACK);
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//glLightfv(GL_LIGHT1,GL_POSITION,pos.data());
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}
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void display()
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{
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using namespace igl;
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using namespace std;
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using namespace Eigen;
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glClearColor(1,1,1,0);
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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if(is_animating)
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{
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double t = (get_seconds() - animation_start_time)/ANIMATION_DURATION;
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if(t > 1)
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{
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t = 1;
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is_animating = false;
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}
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Quaterniond q;
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q.coeffs() =
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animation_to_quat.coeffs()*t + animation_from_quat.coeffs()*(1.-t);
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q.normalize();
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copy(q.coeffs().data(),q.coeffs().data()+4,s.camera.rotation);
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}
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_NORMALIZE);
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lights();
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push_scene();
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push_object();
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// Set material properties
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glEnable(GL_COLOR_MATERIAL);
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glColorMaterial(GL_FRONT_AND_BACK,GL_AMBIENT_AND_DIFFUSE);
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if(wireframe_visible)
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{
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glPolygonMode(GL_FRONT_AND_BACK,GL_LINE);
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if(fill_visible)
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{
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glColor3f(0,0,0);
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draw_mesh(V,F,s.N);
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}else
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{
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draw_mesh(V,F,s.N,s.C);
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}
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}
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glPolygonMode(GL_FRONT_AND_BACK,GL_FILL);
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if(fill_visible)
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{
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glEnable(GL_POLYGON_OFFSET_FILL); // Avoid Stitching!
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glPolygonOffset(1.0, 0);
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draw_mesh(V,F,s.N,s.C);
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}
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pop_object();
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// Draw a nice floor
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glPushMatrix();
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const double floor_offset =
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-2./bbd*(V.col(1).maxCoeff()-Vmid(1));
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glTranslated(0,floor_offset,0);
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const float GREY[4] = {0.5,0.5,0.6,1.0};
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const float DARK_GREY[4] = {0.2,0.2,0.3,1.0};
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draw_floor(GREY,DARK_GREY);
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glPopMatrix();
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pop_scene();
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report_gl_error();
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TwDraw();
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glutSwapBuffers();
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glutPostRedisplay();
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}
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void mouse_wheel(int wheel, int direction, int mouse_x, int mouse_y)
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{
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using namespace std;
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if(wheel == 0)
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{
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static double mouse_scroll_y = 0;
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const double delta_y = 0.125*direction;
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mouse_scroll_y += delta_y;
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// absolute scale difference when changing zooms (+1)
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const double z_diff = 0.01;
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GLint viewport[4];
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glGetIntegerv(GL_VIEWPORT,viewport);
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if(TwMouseMotion(mouse_x, viewport[3] - mouse_y))
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{
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TwMouseWheel(mouse_scroll_y);
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}else
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{
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s.camera.zoom *= (1.0+double(direction)*z_diff);
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const double min_zoom = 0.01;
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const double max_zoom = 10.0;
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s.camera.zoom = min(max_zoom,max(min_zoom,s.camera.zoom));
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}
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}else
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{
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if(!is_rotating)
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{
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// Change viewing angle (reshape will take care of adjust zoom)
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const double a_diff = 1.0;
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s.camera.angle += double(direction)*a_diff;
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const double min_angle = 15.0;
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s.camera.angle =
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min(90.0,max(min_angle,s.camera.angle));
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}
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}
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}
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void mouse(int glutButton, int glutState, int mouse_x, int mouse_y)
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{
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using namespace std;
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using namespace Eigen;
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using namespace igl;
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bool tw_using = TwEventMouseButtonGLUT(glutButton,glutState,mouse_x,mouse_y);
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switch(glutButton)
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{
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case GLUT_RIGHT_BUTTON:
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case GLUT_LEFT_BUTTON:
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{
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switch(glutState)
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{
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case 1:
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// up
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glutSetCursor(GLUT_CURSOR_INHERIT);
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is_rotating = false;
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break;
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case 0:
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if(!tw_using)
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{
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push_undo();
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glutSetCursor(GLUT_CURSOR_CYCLE);
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// collect information for trackball
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is_rotating = true;
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down_camera = s.camera;
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down_x = mouse_x;
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down_y = mouse_y;
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}
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break;
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}
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break;
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// Scroll down
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case GLUT_WHEEL_DOWN:
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{
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mouse_wheel(0,-1,mouse_x,mouse_y);
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break;
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}
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// Scroll up
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case GLUT_WHEEL_UP:
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{
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mouse_wheel(0,1,mouse_x,mouse_y);
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break;
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}
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// Scroll left
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case GLUT_WHEEL_LEFT:
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{
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mouse_wheel(1,-1,mouse_x,mouse_y);
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break;
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}
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// Scroll right
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case GLUT_WHEEL_RIGHT:
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{
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mouse_wheel(1,1,mouse_x,mouse_y);
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break;
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}
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}
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}
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}
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void mouse_drag(int mouse_x, int mouse_y)
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{
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using namespace igl;
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using namespace std;
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using namespace Eigen;
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bool tw_using = TwMouseMotion(mouse_x,mouse_y);
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if(is_rotating)
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{
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glutSetCursor(GLUT_CURSOR_CYCLE);
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switch(rotation_type)
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{
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case ROTATION_TYPE_IGL_TRACKBALL:
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{
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// Rotate according to trackball
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igl::trackball<double>(
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width,
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height,
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2.0,
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down_camera.rotation,
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down_x,
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down_y,
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mouse_x,
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mouse_y,
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s.camera.rotation);
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break;
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}
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case ROTATION_TYPE_TWO_AXIS_VALUATOR_FIXED_UP:
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{
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Quaterniond down_q;
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copy(down_camera.rotation,down_camera.rotation+4,down_q.coeffs().data());
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Vector3d axis(0,1,0);
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const double speed = 2.0;
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Quaterniond q;
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q = down_q *
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Quaterniond(
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AngleAxisd(
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M_PI*((double)(mouse_x-down_x))/(double)width*speed/2.0,
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axis.normalized()));
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q.normalize();
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{
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Vector3d axis(1,0,0);
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const double speed = 2.0;
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if(axis.norm() != 0)
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{
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q =
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Quaterniond(
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AngleAxisd(
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M_PI*(mouse_y-down_y)/(double)width*speed/2.0,
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axis.normalized())) * q;
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q.normalize();
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}
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}
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copy(q.coeffs().data(),q.coeffs().data()+4,s.camera.rotation);
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break;
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}
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default:
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break;
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}
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}
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}
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void init_relative()
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{
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using namespace Eigen;
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using namespace igl;
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per_face_normals(V,F,s.N);
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normalize_row_lengths(s.N,s.N);
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Vmax = V.colwise().maxCoeff();
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Vmin = V.colwise().minCoeff();
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Vmid = 0.5*(Vmax + Vmin);
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bbd = (Vmax-Vmin).norm();
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}
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void randomly_color(
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const Eigen::VectorXi & CC,
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Eigen::MatrixXd & C)
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{
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using namespace Eigen;
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using namespace igl;
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using namespace std;
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VectorXi I;
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srand ( unsigned ( time(0) ) );
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double num_cc = (double)CC.maxCoeff()+1.0;
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randperm(num_cc,I);
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C.resize(CC.rows(),3);
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for(int f = 0;f<CC.rows();f++)
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{
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jet(
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(double)I(CC(f))/num_cc,
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C(f,0),
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C(f,1),
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C(f,2));
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}
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}
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void randomize_colors(void * /*clientData*/)
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{
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push_undo();
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randomly_color(CC,s.C);
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}
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void init_patches()
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{
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using namespace Eigen;
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using namespace igl;
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using namespace std;
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{
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VectorXi VCC;
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components(F,VCC);
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cout<<"There are "<<VCC.maxCoeff()+1<<" connected components of vertices."<<endl;
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}
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bfs_orient(F,F,CC);
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VectorXi I;
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orient_outward(V,F,CC,F,I);
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double num_cc = (double)CC.maxCoeff()+1.0;
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cout<<"There are "<<num_cc<<" 'manifold/orientable' patches of faces."<<endl;
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randomly_color(CC,s.C);
|
|
}
|
|
|
|
void undo()
|
|
{
|
|
using namespace std;
|
|
if(!undo_stack.empty())
|
|
{
|
|
redo_stack.push(s);
|
|
s = undo_stack.top();
|
|
undo_stack.pop();
|
|
}
|
|
}
|
|
|
|
void redo()
|
|
{
|
|
using namespace std;
|
|
if(!redo_stack.empty())
|
|
{
|
|
undo_stack.push(s);
|
|
s = redo_stack.top();
|
|
redo_stack.pop();
|
|
}
|
|
}
|
|
|
|
void key(unsigned char key, int mouse_x, int mouse_y)
|
|
{
|
|
using namespace std;
|
|
int mod = glutGetModifiers();
|
|
switch(key)
|
|
{
|
|
// ESC
|
|
case char(27):
|
|
rebar.save(REBAR_NAME);
|
|
// ^C
|
|
case char(3):
|
|
exit(0);
|
|
case 'I':
|
|
case 'i':
|
|
{
|
|
push_undo();
|
|
s.N *= -1.0;
|
|
break;
|
|
}
|
|
case 'z':
|
|
case 'Z':
|
|
if(mod & GLUT_ACTIVE_COMMAND)
|
|
{
|
|
if(mod & GLUT_ACTIVE_SHIFT)
|
|
{
|
|
redo();
|
|
}else
|
|
{
|
|
undo();
|
|
}
|
|
break;
|
|
}else
|
|
{
|
|
push_undo();
|
|
igl::snap_to_canonical_view_quat<double>(
|
|
s.camera.rotation,
|
|
1.0,
|
|
s.camera.rotation);
|
|
break;
|
|
}
|
|
default:
|
|
if(!TwEventKeyboardGLUT(key,mouse_x,mouse_y))
|
|
{
|
|
cout<<"Unknown key command: "<<key<<" "<<int(key)<<endl;
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
int main(int argc, char * argv[])
|
|
{
|
|
using namespace std;
|
|
using namespace Eigen;
|
|
using namespace igl;
|
|
string filename = "../shared/truck.obj";
|
|
if(argc < 2)
|
|
{
|
|
cerr<<"Usage:"<<endl<<" ./example input.obj"<<endl;
|
|
cout<<endl<<"Opening default mesh..."<<endl;
|
|
}else
|
|
{
|
|
// Read and prepare mesh
|
|
filename = argv[1];
|
|
}
|
|
|
|
// print key commands
|
|
cout<<"[Click] and [drag] Rotate model using trackball."<<endl;
|
|
cout<<"[Z,z] Snap rotation to canonical view."<<endl;
|
|
cout<<"[⌘ Z] Undo."<<endl;
|
|
cout<<"[⇧ ⌘ Z] Redo."<<endl;
|
|
cout<<"[^C,ESC] Exit."<<endl;
|
|
|
|
// dirname, basename, extension and filename
|
|
string d,b,ext,f;
|
|
pathinfo(filename,d,b,ext,f);
|
|
// Convert extension to lower case
|
|
transform(ext.begin(), ext.end(), ext.begin(), ::tolower);
|
|
vector<vector<double > > vV,vN,vTC;
|
|
vector<vector<int > > vF,vFTC,vFN;
|
|
if(ext == "obj")
|
|
{
|
|
// Convert extension to lower case
|
|
if(!igl::readOBJ(filename,vV,vTC,vN,vF,vFTC,vFN))
|
|
{
|
|
return 1;
|
|
}
|
|
}else if(ext == "off")
|
|
{
|
|
// Convert extension to lower case
|
|
if(!igl::readOFF(filename,vV,vF,vN))
|
|
{
|
|
return 1;
|
|
}
|
|
}else if(ext == "wrl")
|
|
{
|
|
// Convert extension to lower case
|
|
if(!igl::readWRL(filename,vV,vF))
|
|
{
|
|
return 1;
|
|
}
|
|
//}else
|
|
//{
|
|
// // Convert extension to lower case
|
|
// MatrixXi T;
|
|
// if(!igl::readMESH(filename,V,T,F))
|
|
// {
|
|
// return 1;
|
|
// }
|
|
// //if(F.size() > T.size() || F.size() == 0)
|
|
// {
|
|
// boundary_faces(T,F);
|
|
// }
|
|
}
|
|
if(vV.size() > 0)
|
|
{
|
|
if(!list_to_matrix(vV,V))
|
|
{
|
|
return 1;
|
|
}
|
|
triangulate(vF,F);
|
|
}
|
|
|
|
init_patches();
|
|
|
|
init_relative();
|
|
|
|
// Init glut
|
|
glutInit(&argc,argv);
|
|
if( !TwInit(TW_OPENGL, NULL) )
|
|
{
|
|
// A fatal error occured
|
|
fprintf(stderr, "AntTweakBar initialization failed: %s\n", TwGetLastError());
|
|
return 1;
|
|
}
|
|
// Create a tweak bar
|
|
rebar.TwNewBar("TweakBar");
|
|
rebar.TwAddVarCB("camera_rotation", TW_TYPE_QUAT4D, set_camera_rotation,get_camera_rotation, NULL, "open readonly=true");
|
|
TwEnumVal RotationTypesEV[NUM_ROTATION_TYPES] =
|
|
{
|
|
{ROTATION_TYPE_IGL_TRACKBALL,"igl trackball"},
|
|
{ROTATION_TYPE_TWO_AXIS_VALUATOR_FIXED_UP,"two axis fixed up"}
|
|
};
|
|
TwType RotationTypeTW =
|
|
ReTwDefineEnum(
|
|
"RotationType",
|
|
RotationTypesEV,
|
|
NUM_ROTATION_TYPES);
|
|
rebar.TwAddVarCB( "rotation_type", RotationTypeTW,
|
|
set_rotation_type,get_rotation_type,NULL,"keyIncr=] keyDecr=[");
|
|
rebar.TwAddVarRW("wireframe_visible",TW_TYPE_BOOLCPP,&wireframe_visible,"key=l");
|
|
rebar.TwAddVarRW("fill_visible",TW_TYPE_BOOLCPP,&fill_visible,"key=f");
|
|
rebar.TwAddButton("randomize colors",randomize_colors,NULL,"key=c");
|
|
rebar.load(REBAR_NAME);
|
|
|
|
|
|
animation_from_quat = Quaterniond(1,0,0,0);
|
|
copy(s.camera.rotation,s.camera.rotation+4,animation_to_quat.coeffs().data());
|
|
animation_start_time = get_seconds();
|
|
|
|
// Init antweakbar
|
|
glutInitDisplayString( "rgba depth double samples>=8 ");
|
|
glutInitWindowSize(glutGet(GLUT_SCREEN_WIDTH)/2.0,glutGet(GLUT_SCREEN_HEIGHT)/2.0);
|
|
glutCreateWindow("patches");
|
|
glutDisplayFunc(display);
|
|
glutReshapeFunc(reshape);
|
|
glutKeyboardFunc(key);
|
|
glutMouseFunc(mouse);
|
|
glutMotionFunc(mouse_drag);
|
|
glutPassiveMotionFunc((GLUTmousemotionfun)TwEventMouseMotionGLUT);
|
|
glutMainLoop();
|
|
|
|
return 0;
|
|
}
|