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Krons
06-01-2010, 08:05 PM
ok so here goes, im trying to make a Pong clone using OGL + Windows, My Problem is that my "CPU" Paddle isnt showing when i run the application:


#include <windows.h>
#include <gl/gl.h>
#include "main.h"

static float f = 0.5;

void PongStart()
{
GAME.P1X = 0;
GAME.P1Y = 0;
GAME.CPUY = 0;
GAME.CPUX = 200;
GAME.Bx = (640/2);
GAME.By = (480/2);
GAME.rot = 4;
}

void DrawP1()
{
glBegin(GL_QUADS);
glVertex2f(GAME.P1X + f, GAME.P1Y + f);
glVertex2f(GAME.P1X + f, GAME.P1Y + f + 150);
glVertex2f(GAME.P1X + f + 15, GAME.P1Y+f+150);
glVertex2f(GAME.P1X + f + 15, GAME.P1Y+f);
glColor3f(0.0, 1.0, 0.0);
glEnd();
}

void DrawCPU()
{
glBegin(GL_QUADS);
glVertex2f(GAME.CPUX + f, GAME.CPUY + f);
glVertex2f(GAME.CPUX + f, GAME.CPUY + f + 150);
glVertex2f(GAME.CPUX + f + 15, GAME.CPUY+f+150);
glVertex2f(GAME.CPUX+f+15, GAME.CPUY+f);
glColor3f(0.0, 0.0, 1.0);
glEnd();
}

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam);
void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC);
void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC);

int WINAPI WinMain (HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int iCmdShow)
{
WNDCLASS wc;
HWND hWnd;
HDC hDC;
HGLRC hRC;
MSG msg;
BOOL bQuit = FALSE;
float theta = 0.0f;

wc.style = CS_OWNDC;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon (NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor (NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH) GetStockObject (BLACK_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = "PONG";
RegisterClass (&amp;wc);

hWnd = CreateWindow (
"PONG", "Pong Game",
WS_CAPTION | WS_POPUPWINDOW | WS_VISIBLE,
0, 0, 640, 480,
NULL, NULL, hInstance, NULL);

EnableOpenGL (hWnd, &amp;hDC, &amp;hRC);

glMatrixMode(GL_PROJECTION);
glOrtho(0, 640, 480, 0, 0, 1);
glDisable(GL_DEPTH_TEST);
glEnable(GL_LINE_SMOOTH | GL_POINT_SMOOTH);
while (!bQuit)
{
if (PeekMessage (&amp;msg, NULL, 0, 0, PM_REMOVE))
{
if (msg.message == WM_QUIT)
{
bQuit = TRUE;
}
else
{
TranslateMessage (&amp;msg);
DispatchMessage (&amp;msg);
}
}
else
{
glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
glClear (GL_COLOR_BUFFER_BIT);

glPushMatrix ();
DrawP1();
DrawCPU();
glPopMatrix ();
SwapBuffers (hDC);
theta += 1.0f;
Sleep (1);
}
}

DisableOpenGL (hWnd, hDC, hRC);

DestroyWindow (hWnd);

return msg.wParam;
}

LRESULT CALLBACK WndProc (HWND hWnd, UINT message,
WPARAM wParam, LPARAM lParam)
{

switch (message)
{
case WM_CREATE:
return 0;
case WM_CLOSE:
PostQuitMessage (0);
return 0;

case WM_DESTROY:
return 0;

case WM_KEYDOWN:
switch (wParam)
{
case VK_ESCAPE:
PostQuitMessage(0);
return 0;
}
return 0;

default:
return DefWindowProc (hWnd, message, wParam, lParam);
}
}

void EnableOpenGL (HWND hWnd, HDC *hDC, HGLRC *hRC)
{
PIXELFORMATDESCRIPTOR pfd;
int iFormat;

*hDC = GetDC (hWnd);

ZeroMemory (&amp;pfd, sizeof (pfd));
pfd.nSize = sizeof (pfd);
pfd.nVersion = 1;
pfd.dwFlags = PFD_DRAW_TO_WINDOW |
PFD_SUPPORT_OPENGL | PFD_DOUBLEBUFFER;
pfd.iPixelType = PFD_TYPE_RGBA;
pfd.cColorBits = 24;
pfd.cDepthBits = 16;
pfd.iLayerType = PFD_MAIN_PLANE;
iFormat = ChoosePixelFormat (*hDC, &amp;pfd);
SetPixelFormat (*hDC, iFormat, &amp;pfd);

*hRC = wglCreateContext( *hDC );
wglMakeCurrent( *hDC, *hRC );

}

void DisableOpenGL (HWND hWnd, HDC hDC, HGLRC hRC)
{
wglMakeCurrent (NULL, NULL);
wglDeleteContext (hRC);
ReleaseDC (hWnd, hDC);
}

This produces a Green Rectangle in the top left corner when it should be displaying both a green rectangle(player) AND a blue rectangle(cpu), anyone know whats wrong?

Krons
06-01-2010, 09:31 PM
It may help if i add that i can only show one of the Vertex Sets, i can view them by cutting out sections of the code but i can only view one of them at a time