Question about DrawGLScene()

Started by HardSniper November 06, 2001 06:43 PM

2 comments, last by HardSniper 23 years, 3 months ago

Author

122

November 06, 2001 06:43 PM

I can''t figure out exactly how this function works when the program is executed... I understand how it draws things to the screen, but I can''t figure out what makes it continually move them around if you have a variable that is incremented for something like rotation. I can''t find anything in the code that says to keep redrawing the scene with the function until the user presses escape. So it seems like the code would run once, then stop, but it can''t if it rotates something...

  
int DrawGLScene(GLvoid)						
{
	glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
	glLoadIdentity();					

	glTranslatef(-1.5f, 0.0f, -6.0f);			

	glRotatef(rtri, 0.0f, 1.0f, 0.0f);

	glBegin(GL_TRIANGLES);					
		glColor3f(1.0f, 0.0f, 0.0f);			
		glVertex3f(0.0f,  1.0f, 0.0f);			
		glColor3f(0.0f, 1.0f, 0.0f);			
		glVertex3f(-1.0f, -1.0f, 0.0f);			
		glColor3f(0.0f, 0.0f, 1.0f);			
		glVertex3f( 1.0f, -1.0f, 0.0f);			
	glEnd();

	glLoadIdentity();					
	glTranslatef(1.5f, 0.0f, -6.0f);			
	glRotatef(rquad, 1.0f, 0.0f, 0.0f);		

	glColor3f(0.5f, 0.5f, 1.0f);				
	glBegin(GL_QUADS);					
		glVertex3f(-1.0f,  1.0f, 0.0f);			
		glVertex3f( 1.0f,  1.0f, 0.0f);			
		glVertex3f( 1.0f, -1.0f, 0.0f);			
		glVertex3f(-1.0f, -1.0f, 0.0f);			
	glEnd();

	rtri += 0.2f;						
	rquad += -0.15f;					

	return TRUE;						
}

Thanks, HardSniper

HardSniper

PyroMeistar

122

November 06, 2001 07:04 PM

The awnser to your question lies in winmain...

feagle814

122

November 06, 2001 07:23 PM

Yeah... the reason you don''t see a loop in there is because there is none.

HardSniper

Author

122

November 06, 2001 07:55 PM

lol, i completely missed the while surrounding the if statement... Thanks,

HardSniper

HardSniper

Question about DrawGLScene()

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Question about DrawGLScene()

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