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glLoadIdentity;
glTranslatef(-1.5,0,0);
glTranslatef(0,0,-6);
glBegin(GL_TRIANGLES);
  glColor3f(1,0,0);
  glVertex3f(-1.0,-1.0, 0.0);
  glColor3f(0,1,0);
  glVertex3f( 0.0, 1.0, 0.0);
  glColor3f(0,0,1);
  glVertex3f( 1.0,-1.0, 0.0);
glEnd();                    

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SwapBuffers(canvas.handle);                    

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glFlush();                    

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unit OpenGltest;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs,opengl12, StdCtrls;

type
  TForm1 = class(TForm)
    procedure FormCreate(Sender: TObject);
    procedure SetDCPixelFormat(Handle: HDC);
    procedure InitGL;
    procedure DrawScene;
    procedure ApplicationEvents1Idle(Sender: TObject;
  var Done: Boolean);

  
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;
   h_DC: hDC;
   hRC: HGLRC;
implementation

{$R *.dfm}

procedure TForm1.FormCreate(Sender: TObject);
begin
InitOpenGL;
h_DC:=GetDC(Handle);
SetDCPixelFormat(h_DC);
hRC:=wglCreateContext(h_DC);
wglMakeCurrent(h_DC,hRC);
glTranslate(0,0,-5); 
glBegin(GL_QUADS); 
  glColor3f(1,0,0);  //Rot 
  glVertex3f(1,-1,0); 
  glColor3f(1,1,0);  //Gelb 
  glVertex3f(1,1,0); 
  glColor3f(0,1,0);  //Grün 
  glVertex3f(-1,1,0); 
  glColor3f(0,0,1);  //Blau 
  glVertex3f(-1,-1,0); 
glEnd;
end;

procedure tform1.SetDCPixelFormat(Handle: HDC);
var
 nPixelFormat: GLUint;
const
 pfd: PIXELFORMATDESCRIPTOR = (
      nSize: sizeof( PIXELFORMATDESCRIPTOR );
      nVersion: 1;
      dwFlags: PFD_DRAW_TO_WINDOW
       or PFD_SUPPORT_OPENGL
       or PFD_DOUBLEBUFFER;
      iPixelType: PFD_TYPE_RGBA;
      cColorBits: 16;
      cRedBits: 0;
      cRedShift: 0;
      cGreenBits: 0;
      cBlueBits: 0;
      cBlueShift: 0;
      cAlphaBits: 0;
      cAlphaShift: 0;
      cAccumBits: 0;
      cAccumRedBits: 0;
      cAccumGreenBits: 0;
      cAccumBlueBits: 0;
      cAccumAlphaBits: 0;
      cDepthBits: 16;
      cStencilBits: 0;
      cAuxBuffers: 0;
      iLayerType: PFD_MAIN_PLANE;
      bReserved: 0;
      dwLayerMask: 0;
      dwVisibleMask: 0;
      dwDamageMask: 0
    );
begin
nPixelFormat:=ChoosePixelFormat(h_DC, @pfd);
SetPixelFormat(h_DC,nPixelFormat,@pfd);
end;

procedure TForm1.InitGL;
begin
  glClearColor(0,0,0,0);
  glClearDepth(1);
  glDepthFunc(GL_LESS);
  glShadeModel(GL_SMOOTH);
  glEnable(GL_DEPTH_TEST);

  glViewport(0,0,Width,Height);
  glMatrixMode(GL_PROJECTION);
  glLoadIdentity;
  gluPerspective(45,Width/Height,1,100);
  glMatrixMode(GL_MODELVIEW);
end;

procedure TForm1.DrawScene;
begin
  glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
  glLoadIdentity;
  //Hier wird später die Scene gezeichnet.

  SwapBuffers(h_DC);
end;

procedure TForm1.ApplicationEvents1Idle(Sender: TObject;
  var Done: Boolean);
begin
  DrawScene;
  Done:=False;
end;


end.