GLfuncs.cpp

#include "gameinclude.h"

extern int screenwidth;
extern int screenheight;
extern player mainPlayer;
extern bool _move;
extern Point mouse;
extern unit *enemy;
extern bool *en_move;
extern int enemy_size;
extern bool ingame;
extern menu Menu;

void resize(int width, int height)
{
	glMatrixMode(GL_PROJECTION);
	glLoadIdentity();//unsure what this does?

	gluOrtho2D(0.0, width, 0, height);//changes the view to the screen ~ IMPORTANT
	
	glScalef(1, -1, 1);//inverts the y axis
	glTranslatef(0, -screenheight, 0);//changes the xy scale, in opengl, 0,0 is bottom left, this makes it upper left
	glViewport(0, 0, width, height);
	
	glMatrixMode(GL_MODELVIEW);

	screenwidth = width;
	screenheight = height;
}

void getResolution()
{
   RECT desktop;
   // Get a handle to the desktop window
   const HWND hDesktop = GetDesktopWindow();
   // Get the size of screen to the variable desktop
   GetWindowRect(hDesktop, &desktop);
   // The top left corner will have coordinates (0,0)
   // and the bottom right corner will have coordinates
   // (horizontal, vertical)
   screenwidth = desktop.right;
   screenheight = desktop.bottom;
}


void display(void)
{
	
	if (!ingame )
	{
		Menu.drawMenu();
	}
	else 
	{
	//movements handling
	playerMovement();//player collisons handled inside this function
	enemyMovement();

	//player drawing
	glPushAttrib(GL_CURRENT_BIT);//keeps players color from changing
	glColor4f(0.0, 1.0, 0.0,1.0); 
	drawPlayer();

	//enemy drawing
	for (int x=0; x<enemy_size; x++)
		drawEnemy(enemy[x].getPosition().x, enemy[x].getPosition().y,enemy[x].getRadius());
	}	

	
	glutSwapBuffers();//swap bufferes!!!! Important for animation
//	glFlush();
}