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{
*****************************************************************************
See the file COPYING.modifiedLGPL.txt, included in this distribution,
for details about the license.
*****************************************************************************
Author: Mattias Gaertner
}
unit MainUnit;
{$mode objfpc}{$H+}
interface
uses
Classes, SysUtils, LCLProc, LResources, Forms, Controls, Graphics, Dialogs,
OpenGLContext, GL, GLU;
type
{ TForm1 }
TForm1 = class(TForm)
procedure FormCreate(Sender: TObject);
procedure OpenGLControl1Paint(Sender: TObject);
procedure OpenGLControl1Resize(Sender: TObject);
procedure OnAppIdle(Sender: TObject; var Done: Boolean);
private
public
cube_rotationx: GLFloat;
cube_rotationy: GLFloat;
cube_rotationz: GLFloat;
OpenGLControl1: TOpenGLControl;
end;
var
Form1: TForm1;
implementation
{$R *.lfm}
{ TForm1 }
procedure TForm1.FormCreate(Sender: TObject);
begin
OpenGLControl1:=TOpenGLControl.Create(Self);
with OpenGLControl1 do begin
Name:='OpenGLControl1';
Align:=alClient;
Parent:=Self;
OnPaint:=@OpenGLControl1Paint;
OnResize:=@OpenGLControl1Resize;
AutoResizeViewport:=true;
end;
Application.AddOnIdleHandler(@OnAppIdle);
end;
procedure TForm1.OpenGLControl1Paint(Sender: TObject);
var
Speed: Double;
begin
glClearColor(1.0, 1.0, 1.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT or GL_DEPTH_BUFFER_BIT);
glEnable(GL_DEPTH_TEST);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
gluPerspective(45.0, double(width) / height, 0.1, 100.0);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glTranslatef(0.0, 0.0,-6.0);
glRotatef(cube_rotationx, cube_rotationy, cube_rotationz, 0.0);
glBegin(GL_QUADS);
glColor3f(0.0,1.0,0.0); // Set The Color To Green
glVertex3f( 1.0, 1.0,-1.0); // Top Right Of The Quad (Top)
glVertex3f(-1.0, 1.0,-1.0); // Top Left Of The Quad (Top)
glVertex3f(-1.0, 1.0, 1.0); // Bottom Left Of The Quad (Top)
glVertex3f( 1.0, 1.0, 1.0); // Bottom Right Of The Quad (Top)
glEnd();
glBegin(GL_QUADS);
glColor3f(1.0,0.5,0.0); // Set The Color To Orange
glVertex3f( 1.0,-1.0, 1.0); // Top Right Of The Quad (Bottom)
glVertex3f(-1.0,-1.0, 1.0); // Top Left Of The Quad (Bottom)
glVertex3f(-1.0,-1.0,-1.0); // Bottom Left Of The Quad (Bottom)
glVertex3f( 1.0,-1.0,-1.0); // Bottom Right Of The Quad (Bottom)
glEnd();
glBegin(GL_QUADS);
glColor3f(1.0,0.0,0.0); // Set The Color To Red
glVertex3f( 1.0, 1.0, 1.0); // Top Right Of The Quad (Front)
glVertex3f(-1.0, 1.0, 1.0); // Top Left Of The Quad (Front)
glVertex3f(-1.0,-1.0, 1.0); // Bottom Left Of The Quad (Front)
glVertex3f( 1.0,-1.0, 1.0); // Bottom Right Of The Quad (Front)
glEnd();
glBegin(GL_QUADS);
glColor3f(1.0,1.0,0.0); // Set The Color To Yellow
glVertex3f( 1.0,-1.0,-1.0); // Bottom Left Of The Quad (Back)
glVertex3f(-1.0,-1.0,-1.0); // Bottom Right Of The Quad (Back)
glVertex3f(-1.0, 1.0,-1.0); // Top Right Of The Quad (Back)
glVertex3f( 1.0, 1.0,-1.0); // Top Left Of The Quad (Back)
glEnd();
glBegin(GL_QUADS);
glColor3f(0.0,0.0,1.0); // Set The Color To Blue
glVertex3f(-1.0, 1.0, 1.0); // Top Right Of The Quad (Left)
glVertex3f(-1.0, 1.0,-1.0); // Top Left Of The Quad (Left)
glVertex3f(-1.0,-1.0,-1.0); // Bottom Left Of The Quad (Left)
glVertex3f(-1.0,-1.0, 1.0); // Bottom Right Of The Quad (Left)
glEnd();
glBegin(GL_QUADS);
glColor3f(1.0,0.0,1.0); // Set The Color To Violet
glVertex3f( 1.0, 1.0,-1.0); // Top Right Of The Quad (Right)
glVertex3f( 1.0, 1.0, 1.0); // Top Left Of The Quad (Right)
glVertex3f( 1.0,-1.0, 1.0); // Bottom Left Of The Quad (Right)
glVertex3f( 1.0,-1.0,-1.0); // Bottom Right Of The Quad (Right)
glEnd();
Speed := double(OpenGLControl1.FrameDiffTimeInMSecs)/10;
cube_rotationx += 5.15 * Speed;
cube_rotationy += 5.15 * Speed;
cube_rotationz += 20.0 * Speed;
OpenGLControl1.SwapBuffers;
end;
procedure TForm1.OpenGLControl1Resize(Sender: TObject);
begin
if OpenGLControl1.Height <= 0 then exit;
// the viewport is automatically resized by the TOpenGLControl
// you can disable it (OpenGLControl1.AutoResizeViewport:=false)
// and do something yourself here
end;
procedure TForm1.OnAppIdle(Sender: TObject; var Done: Boolean);
begin
Done:=false;
//DebugLn(['TForm1.OnAppIdle ']);
OpenGLControl1.Invalidate;
end;
end.
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