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- #include <iostream>
- #include <list>
- #include <cmath>
- #include <algorithm>
- #include <vector>
- #include <GL/glut.h>
- #include <GL/gl.h>
- #include <GL/glu.h>
- using namespace std;
- double scale = 1.0;
- double vx=0,vy=0;
- double p=3.14,r_1=1;
- double kx=5,ky=5;
- int msec = 5;
- float angle_step = M_PI / 30 / 1000.0 * msec;
- void render_square(double x, double y) {
- glPushMatrix();
- double dx = 0.5;
- double dy = 0.5;
- glBegin(GL_POLYGON);
- glVertex2f(x, y);
- glVertex2f(x + dx, y);
- glVertex2f(x + dx, y - dy);
- glVertex2f(x, y - dy);
- glEnd();
- glPopMatrix();
- }
- void draw_line(double x, double y, double x1, double y1) {
- glBegin(GL_LINES);
- glVertex2d(x, y);
- glVertex2d(x1, y1);
- glEnd();
- }
- class circle{
- public:
- double x,y,r,vx,vy;
- circle(double x_, double y_, double r_, double vx_, double vy_):r(r_), x(x_), y(y_){
- vx = vx_ / 1000.0 * msec;
- vy = vy_ / 1000.0 * msec;
- }
- void print_circle(){
- int n=41;
- double cx=x + r;
- double cy=y;
- double step = p/n;
- for (float f=step; f<=p*2;f+=step){
- draw_line(cx ,cy ,cos(f)*r+x ,sin(f)*r+y);
- cx=x + cos(f)*r;
- cy=y + sin(f)*r;
- }
- }
- void update(){
- if(x+r_1>kx || x-r_1<-kx){
- vx*=-1;
- }
- if(y+r_1>ky || y-r_1<-ky){
- vy*=-1;
- }
- x+=vx;
- y+=vy;
- }
- };
- class Vector{
- public:
- float x,y;
- Vector(float a,float b):x(a),y(b){
- }
- Vector operator +(Vector other){
- return Vector(x+other.x, y+other.y);
- }
- Vector operator -(Vector other){
- return Vector(x-other.x, y-other.y);
- }
- Vector operator *(float a){
- return Vector(x*a,y*a);
- }
- Vector operator /(float a){
- return Vector(x/a,y/a);
- }
- float dot (Vector other){
- return x*other.x+y*other.y;
- }
- void print(){
- cout<<'('<<x<<','<<y<<')'<<endl;
- }
- void draw(){
- static float d = 10;
- Vector n1(-y, x);
- Vector n2(y, -x);
- Vector a(x, y);
- Vector ar_1 = (n1 - a*3) / d;
- Vector ar_2 = (n2 - a*3) / d;
- draw_line(0,0,x,y);
- draw_line(x, y, ar_1.x + x, ar_1.y + y);
- draw_line(x, y, ar_2.x + x, ar_2.y + y);
- }
- };
- circle a(0, 0, r_1, 2, 0.05);
- circle b1(0,0,1,0,1);
- vector<circle>particles;
- void draw_clocks(float rad, float stop_angle){
- float coef = 6.0;
- for(float angle = -0.5 * M_PI; angle < stop_angle; angle += M_PI / 7){
- float x = rad * cos(-angle);
- float y = rad * sin(-angle);
- draw_line(x, y, x - x / coef,y - y / coef);
- }
- for(float angle = -0.5 * M_PI; angle < stop_angle; angle += M_PI / 14){
- float x = rad * cos(-angle);
- float y = rad * sin(-angle);
- draw_line(x, y, x - x / coef*0.5,y - y / coef*0.5);
- }
- }
- void collide(vector <circle> & particles){
- for(int i = 0; i < particles.size(); i++){
- for(int j = i + 1; j < particles.size(); j++){
- float l = (particles[i].x - particles[j].x) * (particles[i].x - particles[j].x) + (particles[i].y - particles[j].y) * (particles[i].y - particles[j].y);
- float r = (particles[i].r + particles[j].r) * (particles[i].r + particles[j].r);
- if(l <= r)
- cout << particles[i].x << " - " << particles[j].y << endl;
- }
- }
- }
- void Render() {
- static float cur_angle = -0.5 * M_PI;
- float cur_angle_1=-0.5*M_PI;
- glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
- glLoadIdentity();
- glTranslatef(0, 0, -10);
- glColor3d(1, 1, 1);
- glScalef(scale, scale, scale);
- a.print_circle();
- b1.print_circle();
- Vector b(cos(-cur_angle),sin(-cur_angle));
- cur_angle += angle_step;
- // if (cur_angle==-M_PI*0.5){
- // cur_angle_1+=angle_step;
- // Vector c(cos(-cur_angle_1),sin(-cur_angle_1));
- //}
- draw_clocks(1, 2*M_PI);
- /*
- if(cur_angle%M_PI/6==0){
- draw_line();
- }
- */
- if (cur_angle > 2 * M_PI) cur_angle -= 2 * M_PI;
- draw_line(-kx,-ky,kx,-ky);
- draw_line(kx,-ky,kx,ky);
- draw_line(kx,ky,-kx,ky);
- draw_line(-kx,ky,-kx,-ky);
- for (int i=0;i<particles.size();i+=1){
- particles[i].print_circle();
- particles[i].update();
- }
- collide(particles);
- b.draw();
- glFlush();
- }
- void update(int t) {
- Render();
- glutTimerFunc(msec, update, 0);
- }
- void keyb(unsigned char key, int x, int y) {
- if(key == '+') {
- scale *= 1.1;
- }
- if(key == '-') {
- scale *= 0.9;
- }
- Render();
- }
- void reshape(int w, int h) {
- // предупредим деление на ноль
- // если окно сильно перетянуто будет
- if(h == 0)
- h = 1;
- float ratio = 1.0* w / h;
- // используем матрицу проекции
- glMatrixMode(GL_PROJECTION);
- // Reset матрицы
- glLoadIdentity();
- // определяем окно просмотра
- glViewport(0, 0, w, h);
- // установить корректную перспективу.
- gluPerspective(45,ratio,1,1000);
- // вернуться к модели
- glMatrixMode(GL_MODELVIEW);
- }
- int main(int argc, char **argv)
- {
- particles.push_back(a);
- particles.push_back(b1);
- glutInit(&argc, argv);
- glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB | GLUT_DEPTH);
- glutInitWindowSize(800, 600);
- glutCreateWindow("Physics Engine");
- glEnable(GL_DEPTH_TEST);
- glMatrixMode(GL_PROJECTION);
- glLoadIdentity();
- glMatrixMode(GL_MODELVIEW);
- glLoadIdentity();
- glClearColor(0, 0, 1.0, 0.0);
- glutTimerFunc(50, update, 0);
- glutReshapeFunc(reshape);
- glutDisplayFunc(Render);
- glutKeyboardFunc(keyb);
- glutMainLoop();
- }
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