Topenglpanel May 2026

// Clear buffers Context.SetClearColor($FF1A1A2E); // dark blue-gray Context.Clear([TClearTarget.Color, TClearTarget.Depth]);

uses System.SysUtils, System.Classes, System.Math.Vectors, FMX.Types, FMX.Controls3D, FMX.Objects3D, FMX.MaterialSources, FMX.Controls.Presentation, FMX.Controls, FMX.Forms, FMX.Types3D, FMX.Context.GLES, FMX.Layers3D; TOpenGlPanel

procedure TMyOpenGLPanel.Resize; begin inherited; if Assigned(Context) then Context.SetViewport(RectF(0, 0, Width, Height)); end; // Clear buffers Context

ProjMat := TMatrix.CreatePerspectiveFovRH( DegToRad(60), // Field of view Width / Max(Height, 1), // Aspect ratio 0.1, 100.0 // Near/far planes ); // Clear buffers Context.SetClearColor($FF1A1A2E)

procedure TMyOpenGLPanel.StartAnimation; begin FTimer.Enabled := True; end;

// Each face: two triangles (4 vertices) Context.DrawCubeFace(i, 1.0); // Custom helper (see below) end; end;