OpenGL (SDL,C++) - 3d text rendering - main.cpp

/*3d Collision text rendering, I only upload the functions.cpp, the text.h text.cpp and third.cpp, the rest of the files are not changed. The third.cpp already contain the material of the next tutorial, because I recordedit after this one.
http://www.youtube.com/user/thecplusplusguy
*/
#include "functions.h"
#include "objloader.h"
#include "text.h"
float angle=0.0;

int cube;
objloader obj;
bool mousein=false;
coordinate spherecenter(0.0,0.0,0.0);
coordinate raystart(0.0,0.0,0.0);
text* tex;
void init()
{
    glClearColor(0.5,0.5,0.5,1.0);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
    gluPerspective(45,640.0/480.0,1.0,500.0);
    glMatrixMode(GL_MODELVIEW);
    glEnable(GL_DEPTH_TEST);
    cube=obj.load("test10.obj");
    std::vector<unsigned int> chars;
    char tmp[40];
    for(int i=0;i<26;i++)
    {
        sprintf(tmp,"font/%d.obj",i);
        unsigned int tmp2=obj.load(tmp);
        chars.push_back(tmp2);
    }
    tex=new text(0.9,0.8,chars);
//  cube=loadObject("test.obj");
    glEnable(GL_LIGHTING);
    glEnable(GL_LIGHT0);
    float col[]={1.0,1.0,1.0,1.0};
    glLightfv(GL_LIGHT0,GL_DIFFUSE,col);
    initskybox();
}

coordinate p1(-5.0,5.0,-5.0);
coordinate p2(5.0,5.0,-5.0);
coordinate p3(5.0,-5.0,-5.0);
coordinate p4(-5.0,-5.0,-5.0);
/*

*/

void display()
{
    glClear(GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT);
    glLoadIdentity();
    Control(0.2,0.2,mousein);
    drawSkybox(50.0);
    UpdateCamera();
    float pos[]={-1.0,1.0,-2.0,1.0};
    glLightfv(GL_LIGHT0,GL_POSITION,pos);
//  glTranslatef(0.0,0.0,-4.0);
//  glRotatef(angle,1,1,1);
    glDisable(GL_LIGHTING);
//  if(raysphere(spherecenter.x,spherecenter.y,spherecenter.z,0.0,0.0,1.0,raystart.x, raystart.y,raystart.z,1.0))
    if(rayplane(0.0,0.0,1.0,raystart.x,raystart.y,raystart.z,0.0,0.0,-1.0,p1,p2,p3,p4))
        glColor3f(1.0,0.0,0.0);
    else
        glColor3f(1.0,1.0,1.0);
    //xs+t*xd
    glBegin(GL_LINES);
        glVertex3f(raystart.x,raystart.y,raystart.z);
        glVertex3f(raystart.x+100*0,raystart.y+100*0,raystart.z+100*-1);
    glEnd();
    glBegin(GL_QUADS);
        glVertex3f(-5.0,5.0,-5.0);
        glVertex3f(5.0,5.0,-5.0);
        glVertex3f(5.0,-5.0,-5.0);
        glVertex3f(-5.0,-5.0,-5.0);
        glColor3f(0,0,0);
        glVertex3f(-10.0,0.0,-10.0);
        glVertex3f(-10.0,-5.0,10.0);
        glVertex3f(10.0,-5.0,10.0);
        glVertex3f(10.0,0.0,-10.0);
    glEnd();
    glEnable(GL_LIGHTING);
    glCallList(cube);
    tex->drawText(coordinate(10,0,0),coordinate(angle,0,0),"HELLO\nWORLD\nFROM\nOPENGL");
    glColor3f(1.0,1.0,1.0);
}

                coordinate p5(-10.0,0,-10.0);
                coordinate p6(-10.0,-5.0,10.0);
                coordinate p7(10.0,-5.0,10.0);
                coordinate p8(10.0,0,-10.0);

int main()
{
    SDL_Init(SDL_INIT_EVERYTHING);
    SDL_Surface* screen=SDL_SetVideoMode(640,480,32,SDL_SWSURFACE|SDL_OPENGL);
    bool running=true;
    Uint32 start;
    SDL_Event event;
    init();
    bool b[4]={0,0,0,0};
    while(running)
    {
        start=SDL_GetTicks();
        while(SDL_PollEvent(&event))
        {
            switch(event.type)
            {
                case SDL_QUIT:
                    running=false;
                    break;
                case SDL_MOUSEBUTTONDOWN:
                    mousein=true;
                    SDL_ShowCursor(SDL_DISABLE);
                    break;
                case SDL_KEYDOWN:
                    if(event.key.keysym.sym==SDLK_p)
                    {
                        mousein=false;
                        SDL_ShowCursor(SDL_ENABLE);
                        break;
                    }
                    if(event.key.keysym.sym==SDLK_ESCAPE)
                    {
                        running=false;
                        break;
                    }
                    switch(event.key.keysym.sym)
                    {
                        case SDLK_UP:
                            b[0]=1;
                            break;

                        case SDLK_LEFT:
                            b[1]=1;
                            break;

                        case SDLK_DOWN:
                            b[2]=1;
                            break;

                        case SDLK_RIGHT:
                            b[3]=1;
                            break;
                    }
                    break;
                case SDL_KEYUP:
                    switch(event.key.keysym.sym)
                    {
                        case SDLK_UP:
                            b[0]=0;
                            break;

                        case SDLK_LEFT:
                            b[1]=0;
                            break;

                        case SDLK_DOWN:
                            b[2]=0;
                            break;

                        case SDLK_RIGHT:
                            b[3]=0;
                            break;
                    }
                    break;
            }
        }
        if(b[0])
            raystart.y+=0.3;
        if(b[1])
            raystart.x-=0.3;
        if(b[2])
            raystart.y-=0.3;
        if(b[3])
            raystart.x+=0.3;
        display();
        SDL_GL_SwapBuffers();
        angle+=0.5;
        if(angle>360)
            angle-=360;
        coordinate cameraPos=camPos();
        if(spheresphere(cameraPos,2.0,coordinate(0,0,0),1.0))
            std::cout << "collision\n";
        sphereplane(cameraPos,coordinate(0,0,1),p1,p2,p3,p4,2.0);
        sphereplane(cameraPos,coordinate(0,0.9701425,0.242535625),p5,p6,p7,p8,2.0);
        moveTo(cameraPos);
        if(1000/30>(SDL_GetTicks()-start))
            SDL_Delay(1000/30-(SDL_GetTicks()-start));
    }
    SDL_Quit();
    killskybox();
    delete tex;
    return 0;
}