97 lines
2.3 KiB
C++
97 lines
2.3 KiB
C++
#include "GlutRender.hpp"
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#include <GL/gl.h>
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#include <GL/glut.h>
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#include <cstring>
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GlutRender& GlutRender::get_instance() {
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static GlutRender instance;
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return instance;
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}
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GlutRender::GlutRender() { }
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void GlutRender::init(int* argc, char** argv,
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int wid, int hei, const char* win_name)
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{
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glutInit(argc, argv);
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glutInitDisplayMode(GLUT_DOUBLE);
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glutInitWindowSize(wid, hei);
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glutCreateWindow(win_name);
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glutDisplayFunc(display_handle);
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glutReshapeFunc(reshape_handle);
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glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // Background color
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glClearDepth(1.0f); // Set background depth to farthest
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glEnable(GL_DEPTH_TEST);
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glDepthFunc(GL_LEQUAL);
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glShadeModel(GL_SMOOTH); // Enable smooth shading
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glHint(GL_PERSPECTIVE_CORRECTION_HINT, GL_NICEST);
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}
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void GlutRender::cleanup() {
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}
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void GlutRender::add_mesh(Mesh* mesh) {
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meshes.insert(mesh);
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}
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void GlutRender::remove_mesh(Mesh* mesh) {
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meshes.erase(mesh);
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}
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void GlutRender::run() {
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glutMainLoop();
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}
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void GlutRender::reshape(int wid, int hei) {
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if (hei == 0)
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hei = 1;
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GLfloat aspect = (GLfloat)wid / (GLfloat)hei;
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glViewport(0, 0, wid, hei);
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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// Enable perspective projection with fovy, aspect, zNear and zFar
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gluPerspective(45.0f, aspect, 0.1f, 100.0f);
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}
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void GlutRender::display() {
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glMatrixMode(GL_MODELVIEW);
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// Camera position and orientation
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glLoadIdentity();
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glTranslatef(0., 0., -6.);
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for(Mesh* mesh: meshes) {
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const Point& mesh_center = mesh->get_center();
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const std::vector<Point>& points = mesh->get_vertices();
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glBegin(GL_TRIANGLES);
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for(const Face& face: mesh->get_faces()) {
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Point p0 = face.pt(0, points) + mesh_center,
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p1 = face.pt(1, points) + mesh_center,
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p2 = face.pt(2, points) + mesh_center;
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glColor3f(1.0f, 1.0f, 0.0f);
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glVertex3f(p0[0], p0[1], p0[2]);
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glVertex3f(p1[0], p1[1], p1[2]);
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glVertex3f(p2[0], p2[1], p2[2]);
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}
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glEnd();
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}
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glutSwapBuffers();
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}
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void GlutRender::reshape_handle(int wid, int hei) {
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get_instance().reshape(wid, hei);
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}
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void GlutRender::display_handle() {
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get_instance().display();
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}
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