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| unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, OpenGL12, GeometryTypes;
type
TForm1 = class(TForm)
procedure FormPaint(Sender: TObject);
procedure FormResize(Sender: TObject);
procedure FormDestroy(Sender: TObject);
procedure FormCreate(Sender: TObject);
private
{ Private declarations }
public
RC:HGLRC;
end;
var
Form1: TForm1;
implementation
{$R *.dfm}
procedure TForm1.FormCreate(Sender: TObject);
begin
RC:=CreateRenderingContext(Form1.Canvas.Handle,[opGDI],32,0,0,0,0);
wglMakeCurrent(Form1.Canvas.Handle,RC);
end;
procedure TForm1.FormDestroy(Sender: TObject);
begin
wglDeleteContext(RC);
end;
procedure TForm1.FormPaint(Sender: TObject);
begin
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
glLoadIdentity;
glTranslatef(0,0,-10);
glBegin(GL_QUADS);
glColor3f(1,1,1);
glVertex2f(2,-2);
glVertex2f(-2,-2);
glVertex2f(-2,2);
glVertex2f(2,2 );
glEnd();
end;
procedure TForm1.FormResize(Sender: TObject);
begin
glMatrixMode(GL_PROJECTION);
glLoadIdentity;
gluPerspective(45,Width/Height,1,10);
glViewport(0,0,Form1.Width, Form1.Height);
glMatrixMode(GL_MODELVIEW);
Form1.Paint;
end;
end. |
