Topenglpanel Apr 2026

ProjMat := TMatrix.CreatePerspectiveFovRH( DegToRad(60), // Field of view Width / Max(Height, 1), // Aspect ratio 0.1, 100.0 // Near/far planes );

uses System.UITypes, FMX.Graphics, System.Math; TOpenGlPanel

procedure TMyOpenGLPanel.Paint; var ModelMat, ViewMat, ProjMat: TMatrix; Center: TPoint3D; i: Integer; begin inherited; if not Assigned(Context) then Exit; ProjMat := TMatrix

{ TMyOpenGLPanel }

type TMyOpenGLPanel = class(TOpenGLPanel) private FAngle: Single; FTimer: TTimer; procedure OnTimer(Sender: TObject); protected procedure Paint; override; procedure Resize; override; public constructor Create(AOwner: TComponent); override; destructor Destroy; override; procedure StartAnimation; procedure StopAnimation; end; ProjMat := TMatrix.CreatePerspectiveFovRH( DegToRad(60)

constructor TMyOpenGLPanel.Create(AOwner: TComponent); begin inherited Create(AOwner); FAngle := 0; FTimer := TTimer.Create(Self); FTimer.Interval := 30; // ~33 FPS FTimer.OnTimer := OnTimer; FTimer.Enabled := False; end;

destructor TMyOpenGLPanel.Destroy; begin FTimer.Free; inherited; end;