int main()
{
//The first part of this code will by now be pretty standard to you:
cout << "This is Tut4-lists2 example running" << endl;
//Step 1 is to initialize SDL. Absolutely critical that your SDL application starts with this!
if (SDL_Init(SDL_INIT_VIDEO) != 0){
cout << "Error initializing SDL" << endl;
return -1;
}
//Step 2 is to get a screen/window on which we can do some graphics.
//create a Videoclass to control the video with
SDLVideoclass SDLmain(640,480);
if (SDLmain.InitVideo()){
cout << "Video up and running" << endl;
}else{
cout << "Error initializing Video" << endl;
return 0;
}
//get the events up and running
SDLEventclass SDLevent;
//some GL setup routines
glEnable(GL_DEPTH_TEST); //enable depth buffer
glShadeModel(GL_SMOOTH); //use smooth shading mode.
//setup camera:
glMatrixMode(GL_PROJECTION);
gluPerspective(45.0f,1.33,0.1f,100.0f); //setup the camera
//setup modelview matrix:
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glClearColor(0.0,0.0,0.2,0.0);
//Ok lets start with the display list:
makelists();
GLfloat rot = 0.0;
Uint32 curticks,prevticks;
GLfloat timescale;
curticks = SDL_GetTicks();
//the heights of the piramids
GLfloat height1,height2;
int mod2;
height1 = 2.0;
height2 = 2.0;
mod2 = FALSE;
cout << "Use Left and Right to rotate piramids" << endl;
cout << "Change height of piramid 1 with A and Z" << endl;
cout << "Change height of piramid 2 with S and X" << endl;
//main loop:
while (!SDLevent.MustQuit()){
SDLevent.ProcessEvent();
//main loop 1 - events
//timescale:
prevticks = curticks;
curticks = SDL_GetTicks();
timescale = GLfloat(curticks-prevticks)/1000.0;
//check rotation keys
if (SDLevent.GetKey(SDLK_LEFT))
rot += timescale*90;
if (SDLevent.GetKey(SDLK_RIGHT))
rot -= timescale*90;
//check height change keys
//piramid1 - use immediate recompile of displaylist method
if (SDLevent.GetKey(SDLK_a))
if (height1 < 6.0){
height1 += timescale*1.5;
updatelist(displaylists,height1);
}
if (SDLevent.GetKey(SDLK_z))
if (height1 > 0.0){
height1 -= timescale*1.5;
updatelist(displaylists,height1);
}
//piramid2 - recompile only if needed with GL_COMPILE_AND_EXECUTE method
if (SDLevent.GetKey(SDLK_s))
if (height2 < 6.0){
height2 += timescale*1.5;
mod2 = TRUE;
}
if (SDLevent.GetKey(SDLK_x))
if (height2 > 0.0){
height2 -= timescale*1.5;
mod2 = TRUE;
}
//main loop 2 - graphics
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//we draw 2 piramids:
//piramid 1: to the left
glLoadIdentity();
glTranslatef(-5.0,0.0,-20.0);
glRotatef(rot,0.0,1.0,0.0);
//call the display list to draw the piramid rather than the procedure.
glCallList(displaylists);
//piramid 2: to the right
glLoadIdentity();
glTranslatef(5.0,0.0,-20.0);
glRotatef(-rot,0.0,1.0,0.0);
//call the display list to draw the piramid rather than the procedure.
if (mod2){
//the height2 changed!
glNewList(displaylists+1,GL_COMPILE_AND_EXECUTE);
drawpiramid(height2);
glEndList();
}else{
glCallList(displaylists+1);
}
SDL_GL_SwapBuffers();
}
SDL_Quit();
return 0;
}
int main()
{
cout << "This is Tut6-fog1 example running" << endl;
//Step 1 is to initialize SDL. Absolutely critical that your SDL application starts with this!
if (SDL_Init(SDL_INIT_VIDEO) != 0){
cout << "Error initializing SDL" << endl;
return -1;
}
//Step 2 is to get a screen/window on which we can do some graphics.
//create a Videoclass to control the video with
SDLVideoclass SDLmain(640,480);
if (SDLmain.InitVideo()){
cout << "Video up and running" << endl;
}else{
cout << "Error initializing Video" << endl;
return 0;
}
//get the events up and running
SDLEventclass SDLevent;
setup();
GLfloat rotx,roty;
GLfloat distance;
rotx = 0;
roty = 0;
distance = 10;
Uint32 curticks,prevticks;
GLfloat timescale;
curticks = SDL_GetTicks();
cout << "Move the cube further and closer with the UP/DOWN arrow keys" << endl;
cout << "Press ESC to quit" << endl;
while (!SDLevent.MustQuit()){
SDLevent.ProcessEvent();
//events:
//timescale
prevticks = curticks;
curticks = SDL_GetTicks();
timescale = GLfloat(curticks-prevticks)/1000.0;
//rotation
rotx += timescale*60;
roty += timescale*15;
if (SDLevent.GetKey(SDLK_UP))
if (distance < 21)
distance += timescale*4;
if (SDLevent.GetKey(SDLK_DOWN))
if (distance > 4)
distance -= timescale*4;
//graphics:
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
//setup modelview matrix:
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0,0,-distance);
glRotatef(rotx,1,0,0);
glRotatef(roty,0,1,0);
drawbox();
SDL_GL_SwapBuffers();
}
SDL_Quit();
return 0;
}