unit fMegaCube;

interface

uses
  Winapi.OpenGL,
  System.SysUtils,
  System.Classes,
  Vcl.Graphics,
  Vcl.Controls,
  Vcl.Forms,
  Vcl.ExtCtrls,

  
  GLS.Scene,
  GLS.Objects,
  GLS.VectorGeometry,
  GLS.Texture,
  GLS.Cadencer,
  GLS.VectorTypes,
  GLS.SceneViewer,
  GLS.Color,
  GLS.Coordinates,
  GLS.BaseClasses,
  GLS.SimpleNavigation;

type
  TFormMegacube = class(TForm)
    GLSceneViewer1: TGLSceneViewer;
    GLScene1: TGLScene;
    GLCamera1: TGLCamera;
    DummyCube1: TGLDummyCube;
    GLLightSource1: TGLLightSource;
    GLCadencer1: TGLCadencer;
    GLSimpleNavigation1: TGLSimpleNavigation;
    procedure FormCreate(Sender: TObject);
    procedure GLCadencer1Progress(Sender: TObject;
      const deltaTime, newTime: Double);
  private
  end;

var
  FormMegacube: TFormMegacube;

implementation

{$R *.DFM}

const
  cSize = 10;

procedure TFormMegacube.FormCreate(Sender: TObject);
var
  x, y, z: Integer;
  cube: TGLCube;
  factor, cubeSize: Single;
begin
  // bench only creation and 1st render (with lists builds, etc...)
  factor := 70 / (cSize * 2 + 1);
  cubeSize := 0.4 * factor;
  for x := -cSize to cSize do
    for y := -cSize to cSize do
      for z := -cSize to cSize do
      begin
        cube := TGLCube(DummyCube1.AddNewChild(TGLCube));
        cube.Position.AsVector := PointMake(factor * x, factor * y, factor * z);
        cube.CubeWidth := cubeSize;
        cube.CubeHeight := cubeSize;
        cube.CubeDepth := cubeSize;
        with cube.Material.FrontProperties do
        begin
          Diffuse.Color := VectorLerp(clrYellow, clrRed, (x * x + y * y + z * z)
            / (cSize * cSize * 3));

          // uncomment following lines to stress OpenGL with more color changes calls

           Ambient.Color:=VectorLerp(clrYellow, clrRed, (x*x+y*y+z*z)/(cSize*cSize*3));
           Emission.Color:=VectorLerp(clrYellow, clrRed, (x*x+y*y+z*z)/(cSize*cSize*3));
           Specular.Color:=VectorLerp(clrYellow, clrRed, (x*x+y*y+z*z)/(cSize*cSize*3));
        end;
      end;
end;

procedure TFormMegacube.GLCadencer1Progress(Sender: TObject;
  const deltaTime, newTime: Double);
begin
  DummyCube1.TurnAngle := 90 * newTime; // 90° per second
end;

end.