unit fPhongD;

interface

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

  GLS.Scene,
  GLS.Objects,
  GLS.GeomObjects,
  GLS.Texture,
  GLS.SceneViewer,
  GLS.AsyncTimer,
  GLS.Cadencer,

  GLS.Material,
  GLS.Coordinates,
  GLS.BaseClasses,
  GLSL.AsmShader,
  GLSL.CustomShader,
  GLSL.PhongShader;

type
  TForm1 = class(TForm)
    GLScene1: TGLScene;
    GLSceneViewer1: TGLSceneViewer;
    GLMaterialLibrary1: TGLMaterialLibrary;
    GLPhongShader1: TGLPhongShader;
    GLCamera1: TGLCamera;
    GLTeapot1: TGLTeapot;
    GLDummyCube1: TGLDummyCube;
    GLLightSource1: TGLLightSource;
    GLCadencer1: TGLCadencer;
    AsyncTimer1: TGLAsyncTimer;
    CheckBox1: TCheckBox;
    procedure GLSceneViewer1MouseDown(Sender: TObject; Button: TMouseButton;
      Shift: TShiftState; X, Y: Integer);
    procedure GLSceneViewer1MouseMove(Sender: TObject; Shift: TShiftState;
      X, Y: Integer);
    procedure AsyncTimer1Timer(Sender: TObject);
    procedure CheckBox1Click(Sender: TObject);
    procedure GLCadencer1Progress(Sender: TObject;
      const deltaTime, newTime: Double);
  public
    mx, my: Integer;
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.GLSceneViewer1MouseDown(Sender: TObject; Button: TMouseButton;
  Shift: TShiftState; X, Y: Integer);
begin
  mx := X;
  my := Y;
end;

procedure TForm1.GLSceneViewer1MouseMove(Sender: TObject; Shift: TShiftState;
  X, Y: Integer);
begin
  if ssLeft in Shift then
    GLCamera1.MoveAroundTarget(my - Y, mx - X);
  mx := X;
  my := Y;
end;

procedure TForm1.AsyncTimer1Timer(Sender: TObject);
begin
  Form1.Caption := 'Phong Shader - ' + GLSceneViewer1.FramesPerSecondText;
  GLSceneViewer1.ResetPerformanceMonitor;
end;

procedure TForm1.CheckBox1Click(Sender: TObject);
begin
  GLPhongShader1.Enabled := CheckBox1.Checked;
end;

procedure TForm1.GLCadencer1Progress(Sender: TObject;
  const deltaTime, newTime: Double);
begin
  CheckBox1.Checked := GLPhongShader1.Enabled;
  GLSceneViewer1.Invalidate;
end;

end.