Z axis trouble with glTranslatef(...) - LWJGL
- by Zarkopafilis
Here is the code:
private static boolean up = true , down = false , left = false , right = false, reset = false, in = false , out = false;
public void start() {
try {
Display.setDisplayMode(new DisplayMode(800,600));
Display.create();
} catch (LWJGLException e) {
e.printStackTrace();
System.exit(0);
}
GL11.glMatrixMode(GL11.GL_PROJECTION);
GL11.glLoadIdentity();
GL11.glOrtho(0, 800, 0, 600, 0.00001f, 1000);
GL11.glMatrixMode(GL11.GL_MODELVIEW);
Keyboard.enableRepeatEvents(true);
while (!Display.isCloseRequested()) {
GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
input();
if(up){
GL11.glTranslatef(0,0.1f,0);
}
if(down){
GL11.glTranslatef(0,-0.1f,0);
}
if(left){
GL11.glTranslatef(-0.1f,0,0);
}
if(right){
GL11.glTranslatef(0.1f,0,0);
}
if(in){
GL11.glTranslatef(0, 0, 1f);
}
if(out){
GL11.glTranslatef(0, 0, -1f);
}
if(reset){
GL11.glLoadIdentity();
}
GL11.glBegin(GL11.GL_QUADS);
GL11.glColor3f(255, 255, 255);
GL11.glVertex3f(800/2, 600/2, 0);
GL11.glVertex3f(800/2 + 200, 600/2, 0);
GL11.glVertex3f(800/2 + 200, 600/2 + 200, 0);
GL11.glVertex3f(800/2, 600/2 + 200, 0);
GL11.glColor3f(0, 255, 0);
GL11.glVertex3f(800/2, 600/2, 1);
GL11.glVertex3f(800/2 + 200, 600/2, 1);
GL11.glVertex3f(800/2 + 200, 600/2 + 200, 1);
GL11.glVertex3f(800/2, 600/2 + 200, 1);
GL11.glEnd();
Display.update();
}
Display.destroy();
}
public static void main(String[] argv){
new main().start();
}
public void input(){
up = false;
down = false;
left = false;
right = false;
reset = false;
in = false;
out = false;
if(Keyboard.isKeyDown(Keyboard.KEY_SPACE)){
reset = true;
}
if(Keyboard.isKeyDown(Keyboard.KEY_W)){
up = true;
}
if(Keyboard.isKeyDown(Keyboard.KEY_S)){
down = true;
}
if(Keyboard.isKeyDown(Keyboard.KEY_A)){
left = true;
}
if(Keyboard.isKeyDown(Keyboard.KEY_D)){
right = true;
}
if(Keyboard.isKeyDown(Keyboard.KEY_Q)){
in = true;
}
if(Keyboard.isKeyDown(Keyboard.KEY_E)){
out = true;
}
}
As you can see I am creating 2 quads , a white one at z 0 and a green one at z 1. WASD keys function correctly.
Also when I hit SPACEBAR the white quad is being shown. If I then press E , I can see the green quad. But if I press Q afterwards , I dont see the white one again!(Space Works everytime). Also if I render the green one at Z = -1 everything works perfectly BUT you may need up to 3 key presses Q/E to see the other quad. Why is that happening?
