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Matthew Shockley

OpenGL OpenGL 2D

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I want to create a 2D game and display everything by pixels. Here is my code so far:
void ResizeGraphics()
{
    // Get new window size
    RECT rect;
	int Width, Height;
	GLfloat aspect;

    GetClientRect(hWnd, &rect);
    Width = rect.right;
    Height = rect.bottom;
    aspect = (GLfloat)Width / Height;

    // Adjust graphics to window size
    glViewport(0, 0, Width, Height);
    glMatrixMode(GL_PROJECTION);
    glLoadIdentity();
	//gluPerspective(45.0, aspect, 1.0, 100.0);
    glOrtho(0, Width, Height, 0, 0, 1);
    glMatrixMode(GL_MODELVIEW);
}
Bad thing is, it doesn't render anything on the screen. Can someone please explain to me what I am doing wrong?

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Here you go:

void DrawGraphics()
{
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslated(0, 0, -10);
glBegin(GL_TRIANGLES);
glColor3d(1, 0, 0);
glVertex3d(10, 20, 0);
glVertex3d(15, 20, 0);
glVertex3d(20, 25, 0);
glEnd();
SwapBuffers(hDC);
}

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You're drawing your object outside of the box you specified with glOrtho. You've specified a znear and zfar of 0 and 1, but you're drawing objects at -10.

The z for the object has to be between 0 and 1, or alternatively, expand your near and far planes.

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