OpenGL... Bang Bang Bang Bang Bang

The code executes without any errors thrown but nothing is drawn on the screen?

Any ideas, please?

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71

#include "frmDeviceRender.h"

void FrmDeviceRender::setFormDefaults() {
	setFormProperties(0, WS_OVERLAPPEDWINDOW , CW_USEDEFAULT, CW_USEDEFAULT, 400, 300, TEXT("Rendered Container"));
};

void FrmDeviceRender::onPaint() {
	hdc = GetDC (me) ;
	
	GLsizei width = 200;
	GLsizei height = 200;
	int bits = 32;
	GLuint		PixelFormat;
	static	PIXELFORMATDESCRIPTOR pfd=
	{
		sizeof(PIXELFORMATDESCRIPTOR),	// Size Of This Pixel Format Descriptor
		1,								// Version Number
		PFD_DRAW_TO_WINDOW |			// Format Must Support Window
		PFD_SUPPORT_OPENGL |			// Format Must Support OpenGL
		PFD_DOUBLEBUFFER,				// Must Support Double Buffering
		PFD_TYPE_RGBA,					// Request An RGBA Format
		bits,							// Select Our Color Depth
		0, 0, 0, 0, 0, 0,				// Color Bits Ignored
		0,								// No Alpha Buffer
		0,								// Shift Bit Ignored
		0,								// No Accumulation Buffer
		0, 0, 0, 0,						// Accumulation Bits Ignored
		16,								// 16Bit Z-Buffer (Depth Buffer)  
		0,								// No Stencil Buffer
		0,								// No Auxiliary Buffer
		PFD_MAIN_PLANE,					// Main Drawing Layer
		0,								// Reserved
		0, 0, 0							// Layer Masks Ignored
	};

	if (!(PixelFormat=ChoosePixelFormat(hdc,&pfd))) {
		MessageBox(NULL,L"Can't Find A Suitable PixelFormat.",L"ERROR",MB_OK|MB_ICONEXCLAMATION);
	}

	if(!SetPixelFormat(hdc,PixelFormat,&pfd)) {
		MessageBox(NULL,L"Can't Set The PixelFormat.",L"ERROR",MB_OK|MB_ICONEXCLAMATION);
	}

	if (!(hRC=wglCreateContext(hdc))) {
		MessageBox(NULL,L"Can't Create A GL Rendering Context.",L"ERROR",MB_OK|MB_ICONEXCLAMATION);
	}

	if(!wglMakeCurrent(hdc,hRC)) {
		MessageBox(NULL,L"Can't Activate The GL Rendering Context.",L"ERROR",MB_OK|MB_ICONEXCLAMATION);
	}

	glClearColor (0.0, 0.0, 0.0, 0.0);
	glClear (GL_COLOR_BUFFER_BIT);
	glColor3f (1.0, 1.0, 1.0);
	glOrtho(0.0, 1.0, 0.0, 1.0, -1.0, 1.0);
	glBegin(GL_POLYGON);
	glVertex3f (0.25, 0.25, 0.0);
	glVertex3f (0.75, 0.25, 0.0);
	glVertex3f (0.75, 0.75, 0.0);
	glVertex3f (0.25, 0.75, 0.0);
	glEnd();
	glFlush();

	ReleaseDC (me, hdc) ;
}

void FrmDeviceRender::onUnload() {
	PostQuitMessage (0);
};

Last edited on
¿swap buffers?
Thanks :)
Topic archived. No new replies allowed.