403 lines
7.8 KiB
C++
403 lines
7.8 KiB
C++
#include <iostream>
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#include <string>
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#include <GL/freeglut.h>
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/* Prototypes */
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void obj_flag(void);
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void obj_cube(float clr);
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void obj_cube2(void);
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void set_view(int);
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void draw_string(std::string, int, int);
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void calculateFPS(void);
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/* Variables */
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float rotation = 0;
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float keyrotationx = 0;
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float keyrotationy = 0;
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float changelocation = 0;
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float camerazoom = 5;
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float color = 0;
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int width = 800;
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int height = 600;
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bool wireframe = false;
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bool persp = true;
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bool rotatec = true;
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int frameCount = 0;
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int currentTime = 0;
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int previousTime = 0;
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int fps = 0;
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float cameraRot = 0;
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void display()
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{
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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glClearColor(1.0, 0.7, 0.0, 1.0);
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set_view(0);
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if(rotatec)
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cameraRot += 0.001f;
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//Cube 2
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glTranslatef(3.0f, 0, 0);
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glRotatef(rotation / 2, 0, 0, 1);
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obj_cube(1.0f);
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glRotatef(rotation / 2, 0, 0, -1);
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glTranslatef(-3.0, 0, 0);
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//Cube 3
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glTranslatef(-3.0f, 0, 0);
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glRotatef(rotation / 2, 1, 0, 0);
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obj_cube(1.0f);
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glRotatef(rotation / 2, -1, 0, 0);
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glTranslatef(3.0f, 0, 0);
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//Cube 4
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glTranslatef(0, 0, 3.0f);
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glRotatef(rotation / 2, 1, 1, 0);
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obj_cube(color);
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glRotatef(rotation / 2, -1, -1, 0);
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glTranslatef(0, 0, -3.0f);
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//Cube 1
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float tempx = keyrotationx;
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float tempy = keyrotationy;
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glTranslatef(changelocation, 0, 0);
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glRotatef(tempy, 1, 0, 0);
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glRotatef(tempx, 0, 1, 0);
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obj_cube(1.0f);
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glTranslatef(0, 0, changelocation);
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glRotatef(tempy, -1, 0, 0);
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glRotatef(tempx, 0, -1, 0);
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//overlay
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set_view(1);
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std::string str0 = "FPS: " + std::to_string(fps);
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std::string str1 = "Wireframe: " + std::string(wireframe ? "On" : "Off") + " (L)";
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std::string str2 = "Projectie: " + std::string(persp ? "Perspective" : "Ortho") + " (SPC)";
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std::string str3 = "Rotation: " + std::string(rotatec ? "On" : "Off") + " (R)";
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std::string str4 = "Zoom: " + std::to_string(camerazoom) + " (+/-)";
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draw_string(str0, 10, 30);
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draw_string(str1, 10, 60);
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draw_string(str2, 10, 90);
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draw_string(str3, 10, 120);
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draw_string(str4, 10, 150);
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frameCount++;
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glutSwapBuffers();
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}
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void draw_string(std::string s, int x, int y)
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{
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glColor3f(0.0f, 0.0f, 0.0f);
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glRasterPos3f(x, y, 0);
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glutBitmapString(GLUT_BITMAP_HELVETICA_18, (const unsigned char*)s.c_str());
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}
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void set_view(int view)
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{
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if (view == 0)
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{
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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if (persp)
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gluPerspective(90, (float)width / height, 0.5f, 20.0f);
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else
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glOrtho(-8, 8, -8, 8, 0.5f, 20.0f);
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if (wireframe)
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glPolygonMode(GL_FRONT_AND_BACK, GL_LINE);
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else
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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gluLookAt(cos(cameraRot) * camerazoom, camerazoom, sin(cameraRot) * camerazoom,
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0, 0, 0,
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0, 1, 0);
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}
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else
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{
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glMatrixMode(GL_PROJECTION);
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glLoadIdentity();
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glOrtho(0, width, height, 0, -0.5f, 20.0f);
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glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
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glMatrixMode(GL_MODELVIEW);
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glLoadIdentity();
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}
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}
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void idle()
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{
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rotation += 0.1f;
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glutPostRedisplay();
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calculateFPS();
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}
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void keyboard(unsigned char key, int x, int y)
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{
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if (key == 27)
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exit(0);
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else if (key == 32)
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persp = !persp;
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else if (key == 114)
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rotatec = !rotatec;
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else if (key == 108)
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wireframe = !wireframe;
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else if (key == 119)
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keyrotationy += 6.0f;
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else if (key == 115)
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keyrotationy -= 6.0f;
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else if (key == 97)
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keyrotationx -= 6.0f;
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else if (key == 100)
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keyrotationx += 6.0f;
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else if (key == 113)
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changelocation += 2.0f;
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else if (key == 101)
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changelocation -= 2.0f;
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else if (key == 43)
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camerazoom -= (camerazoom <= 1.7f ? 0 : 0.2f);
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else if (key == 45)
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camerazoom += (camerazoom >= 9.9f ? 0 : 0.2f);
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}
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void specialkeyboard(int key, int x, int y)
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{
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switch (key)
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{
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case GLUT_KEY_UP:
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keyrotationy += 2.0f;
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break;
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case GLUT_KEY_DOWN:
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keyrotationy -= 2.0f;
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break;
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case GLUT_KEY_LEFT:
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keyrotationx -= 2.0f;
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break;
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case GLUT_KEY_RIGHT:
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keyrotationx += 2.0f;
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break;
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}
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}
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void mousemoved(int x, int y)
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{
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color = (x / 100);
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}
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void resize(int w, int h)
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{
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width = w;
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height = w;
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}
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void calculateFPS()
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{
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currentTime = glutGet(GLUT_ELAPSED_TIME);
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int timeInterval = currentTime - previousTime;
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if (timeInterval > 1000)
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{
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fps = frameCount / (timeInterval / 1000.0f);
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previousTime = currentTime;
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frameCount = 0;
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}
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}
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int main(int argc, char *argv[])
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{
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glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
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glutInitWindowSize(width, height);
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glutInit(&argc, argv);
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glutCreateWindow("Cubes");
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glEnable(GL_DEPTH_TEST);
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glutDisplayFunc(display);
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glutIdleFunc(idle);
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glutKeyboardFunc(keyboard);
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glutSpecialFunc(specialkeyboard);
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glutPassiveMotionFunc(mousemoved);
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glutReshapeFunc(resize);
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glutMainLoop();
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return 0;
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}
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void obj_cube2()
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{
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glBegin(GL_TRIANGLES);
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glColor3f(1.0f, 0.7f, 1.0f);
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glVertex3f(0, 0, 0);
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glColor3f(0.5, 1, 0.1);
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glVertex3f(0, 1, 0);
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glVertex3f(1, 1, 0);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.1, 1, 0.1);
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glVertex3f(0, 0, 0);
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glVertex3f(1, 1, 0);
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glColor3f(0.1, 1, 0.1);
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glVertex3f(1, 0, 0);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.1, 0.5, 0.1);
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glVertex3f(1, 1, 0);
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glVertex3f(1, 0, 0);
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glVertex3f(1, 1, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.1, 0.5, 0.5);
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glVertex3f(1, 0, 1);
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glVertex3f(1, 0, 0);
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glVertex3f(1, 1, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.1, 0.1, 0.1);
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glVertex3f(0, 0, 0);
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glVertex3f(1, 0, 0);
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glVertex3f(1, 0, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.5, 0.1, 0.1);
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glVertex3f(0, 0, 0);
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glVertex3f(0, 0, 1);
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glVertex3f(1, 0, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.5, 0.1, 0.5);
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glVertex3f(0, 0, 0);
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glVertex3f(0, 1, 0);
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glVertex3f(0, 1, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.5, 0.5, 0.5);
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glVertex3f(0, 0, 0);
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glVertex3f(0, 0, 1);
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glVertex3f(0, 1, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.5, 1, 0.5);
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glVertex3f(1, 1, 1);
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glVertex3f(0, 0, 1);
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glVertex3f(0, 1, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(1, 1, 0.5);
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glVertex3f(1, 1, 1);
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glVertex3f(0, 1, 0);
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glVertex3f(0, 1, 1);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(1, 1, 1);
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glVertex3f(1, 1, 1);
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glVertex3f(1, 1, 0);
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glVertex3f(0, 1, 0);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(1, 0.3, 0.8);
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glVertex3f(1, 1, 1);
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glVertex3f(0, 0, 1);
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glVertex3f(1, 0, 1);
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glEnd();
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}
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void obj_cube(float clr)
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{
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//Side 1 : Green
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glBegin(GL_QUADS);
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glColor3f(0.0f, 1.0f / clr, 0.0f);
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glVertex3f(-1, -1, -1);
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glVertex3f(-1, 1, -1);
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glColor3f(0.5f, 1.0f / clr, 0.5f);
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glVertex3f(1, 1, -1);
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glVertex3f(1, -1, -1);
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glEnd();
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//Side 2 : Red
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glBegin(GL_QUADS);
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glColor3f(1.0f / clr, 0.0f, 0.0f);
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glVertex3f(-1, -1, 1);
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glVertex3f(-1, 1, 1);
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glColor3f(1.0f / clr, 0.5f, 0.5f);
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glVertex3f(1, 1, 1);
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glVertex3f(1, -1, 1);
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glEnd();
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//Side 3 : Blue
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glBegin(GL_QUADS);
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glColor3f(0.0f, 0.0f, 1.0f / clr);
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glVertex3f(-1, -1, -1);
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glVertex3f(-1, -1, 1);
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glColor3f(0.5f, 0.5f, 1.0f / clr);
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glVertex3f(-1, 1, 1);
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glVertex3f(-1, 1, -1);
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glEnd();
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//Side 4 : Yellow
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glBegin(GL_QUADS);
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glColor3f(1.0f / clr, 1.0f / clr, 0.0f);
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glVertex3f(1, -1, -1);
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glVertex3f(1, -1, 1);
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glColor3f(1.0f / clr, 1.0f / clr, 0.5f);
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glVertex3f(1, 1, 1);
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glVertex3f(1, 1, -1);
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glEnd();
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//Side 5 : Purple
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glBegin(GL_QUADS);
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glColor3f(1.0f / clr, 0.0f, 1.0f / clr);
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glVertex3f(-1, -1, -1);
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glVertex3f(-1, -1, 1);
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glColor3f(1.0f / clr, 0.5f, 1.0f / clr);
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glVertex3f(1, -1, 1);
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glVertex3f(1, -1, -1);
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glEnd();
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//Side 6 : Light blue
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glBegin(GL_QUADS);
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glColor3f(0.0f, 1.0f / clr, 1.0f / clr);
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glVertex3f(-1, 1, -1);
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glVertex3f(-1, 1, 1);
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glColor3f(0.5f, 1.0f / clr, 1.0f / clr);
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glVertex3f(1, 1, 1);
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glVertex3f(1, 1, -1);
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glEnd();
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}
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void obj_flag()
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{
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glBegin(GL_TRIANGLES);
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glColor3f(1.0f, 0.7f, 1.0f);
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glVertex3f(0, 0, 0);
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glVertex3f(0, 1, 0);
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glVertex3f(1, 1, 0);
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glEnd();
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glBegin(GL_TRIANGLES);
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glColor3f(0.1, 1, 0.1);
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glVertex3f(0, 0, 0);
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glVertex3f(1, 1, 0);
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glVertex3f(1, 0, 0);
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glEnd();
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} |