ViewMat := TMatrix.CreateLookAt( Point3D(0, 2, 5), // Eye position Point3D(0, 0, 0), // Look-at center Point3D(0, 1, 0) // Up vector );
procedure TMyOpenGLPanel.Resize; begin inherited; if Assigned(Context) then Context.SetViewport(RectF(0, 0, Width, Height)); end;
{ TMyOpenGLPanel }
type TOpenGLContextHelper = class helper for TContext3D public procedure DrawCubeFace(FaceIndex: Integer; Size: Single); end; implementation
// Each face: two triangles (4 vertices) Context.DrawCubeFace(i, 1.0); // Custom helper (see below) end; end; TOpenGlPanel
Context.SetModelViewMatrix(ModelMat * ViewMat); Context.SetProjectionMatrix(ProjMat);
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; ViewMat := TMatrix
uses System.UITypes, FMX.Graphics, System.Math;
end. procedure TForm1.FormCreate(Sender: TObject); begin var Panel := TMyOpenGLPanel.Create(Self); Panel.Parent := Self; Panel.Align := TAlignLayout.Client; Panel.StartAnimation; end; Custom Helper (simplified cube drawing) Add this to the implementation section or a separate unit: ViewMat := TMatrix.CreateLookAt( Point3D(0