КГ Дом1

    #include <windows.h>
    #include <gl\gl.h>
    #include <gl\glu.h>
    #include <gl\glut.h>
    #define _USE_MATH_DEFINES
    #include <math.h>
    #include <stdio.h>
    #include <iostream>
    #include <ctime>

    static void redraw(void);
    int main(int argc, char **argv);

    int main(int argc, char **argv)
    {


            glutInit(&argc,argv);
            glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
            glutInitWindowSize(800,800);
            glutCreateWindow("Шаховска Табла");

            glutDisplayFunc(redraw);

            glMatrixMode(GL_PROJECTION);                                            //hello
            gluPerspective(45, //view angle
                                                    1.0,    //aspect ratio
                                                    10.0, //near clip
                                                    200.0);//far clip
            glMatrixMode(GL_MODELVIEW);

            glutMainLoop();

            return 0;
    }

    static void crtajKrug(int s, int od, float r, float xk, float yk, bool bela, bool loop){
        float x,y;
        float radius = r;
        yk*=-1;
        if(!loop)
        glBegin(GL_POLYGON);
        else
            glBegin(GL_LINE_LOOP);
        if(bela)
            glColor3f(1.0f,1.0f,1.0f);
        else
            glColor3f(0.0f,0.0f,0.0f);
        if(od==0){
        x = (float)radius * cos(359 * M_PI/180.0f)+xk;
        y = (float)radius * sin(359 * M_PI/180.0f)+8+yk;
        }
        else{
            x = (float)radius * cos(od * M_PI/180.0f)+xk;
            y = (float)radius * sin(od * M_PI/180.0f)+8+yk;
        }
        for(int j = od; j <= s; j++)
        {
            glVertex2f(x,y);
            x = (float)radius * cos(j * M_PI/180.0f)+xk;
            y = (float)radius * sin(j * M_PI/180.0f)+8+yk;
            glVertex2f(x,y);
        }
        glEnd();
    }

    static void crtajKrugsostrelki(int s, int od, float r, float xk, float yk, bool bela, bool loop, int agol){
        float x,y;
        float radius = r;
        yk*=-1;
        if(!loop)
        glBegin(GL_POLYGON);
        else
            glBegin(GL_LINE_LOOP);
        if(bela)
            glColor3f(1.0f,1.0f,1.0f);
        else
            glColor3f(0.0f,0.0f,0.0f);
        if(od==0){
        x = (float)radius * cos(359 * M_PI/180.0f)+xk;
        y = (float)radius * sin(359 * M_PI/180.0f)+8+yk;
        }
        else{
            x = (float)radius * cos(od * M_PI/180.0f)+xk;
            y = (float)radius * sin(od * M_PI/180.0f)+8+yk;
        }
        for(int j = od; j <= s; j++)
        {
            glVertex2f(x,y);
            x = (float)radius * cos(j * M_PI/180.0f)+xk;
            y = (float)radius * sin(j * M_PI/180.0f)+8+yk;
            glVertex2f(x,y);
        }
        glEnd();

        glBegin(GL_LINES);
            glVertex2f(xk, yk+8);
            glVertex2f(xk, yk+8.8);
            glVertex2f(xk, yk+8);
            xk = 0.5 * cos(agol * M_PI/180.0f);
            yk = 0.5 * sin(agol * M_PI/180.0f);
            glVertex2f(xk, yk+8);
        glEnd();
    }


    static void crtajkrugcinja(int s, int od, float r, float xk, float yk, bool bela){
        float x,y;
        float radius = r;
        yk*=-1;
        x = (float)radius * cos(359 * M_PI/180.0f)+xk;
        y = (float)radius * sin(359 * M_PI/180.0f)+8+yk;

        float xstar = 0, ystar = 0;
        for(int j = od; j <= s; j+=30)
        {
            x = (float)radius * cos(j * M_PI/180.0f)+xk;
            y = (float)radius * sin(j * M_PI/180.0f)+8+yk;
            glLoadIdentity();
            glTranslatef(x,y-12,-10);
            glScalef(0.5,0.5,1);
            crtajKrugsostrelki(360,0,1,0,0,false,true, j);
        }

    }




    static void redraw(void)
    {
            glClear(GL_COLOR_BUFFER_BIT);

            glPushMatrix();
            glTranslatef(0,-8,-10);
            //Crtaj osnova
            crtajKrug(360,0,3.5,0,0,true,false);
            crtajKrug(360,0,0.1,0,0,false,false);

            time_t now = time(0);

            tm *ltm = localtime(&now);
            printf("%d", ltm->tm_min);
            int minagol, casagol;

            if(ltm->tm_min<=15){
                minagol = 90-((ltm->tm_min)*6);
            }
            else
                minagol = 360 - ((ltm->tm_min-15)*6);

            if(ltm->tm_hour > 12) ltm->tm_hour -=12;
            if(ltm->tm_hour<=3){
                casagol = 90-((ltm->tm_hour)*30 + (ltm->tm_min)*0.5);
            }
            else
                casagol = 360 - ((ltm->tm_hour-3)*30 + (ltm->tm_min)*0.5);


            glBegin(GL_LINES);
            glVertex2f(0, 8);
            glVertex2f(2 * cos(minagol * M_PI/180.0f), 2 * sin(minagol * M_PI/180.0f)+8);
            glVertex2f(0, 8);
            glVertex2f(1 * cos(casagol * M_PI/180.0f), 1 * sin(casagol * M_PI/180.0f)+8);

        glEnd();


            //Crtaj pomali
             glLoadIdentity();
             glTranslatef(2.8,-4,-10);
             glScalef(0.5,0.5,1);
             crtajkrugcinja(360,0,2.8,0,0,false);

            glPopMatrix();
            glutSwapBuffers();



    }