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| {$MODE OBJFPC}
{$M+}
unit Rendering;
interface
uses SDL2, Classes;
type
RenderingObject = class
private
function GetPosition:PSDL_Point;
function GetSize:PSDL_Point;
protected
_rectangle : PSDL_Rect;
public
procedure Update(elapsedTime : real); virtual;
procedure Draw(renderer : PSDL_Renderer); virtual;
procedure SetPosition(x, y: integer);
procedure SetSize(h, w : integer);
property Position : PSDL_Point read GetPosition;
property Size : PSDL_Point read GetSize;
constructor Initialize;
destructor Dispose;
end;
type
IContainer = interface
function GetPosition():PSDL_Rect;
procedure SetPosition(x, y : integer);
end;
type {Pointeurs sur types}
PIContainer = ^IContainer;
type
Surface = class(RenderingObject)
protected
_surface : PSDL_Surface;
_rotation : real;
_origin : PSDL_Point;
_worldOrigin : PSDL_Rect;
_flip : TSDL_RendererFlip;
_parent : PIContainer;
public
property Parent : PIContainer read _parent write _parent;
procedure LinkContainer(container : PIContainer);
constructor Initialize;
destructor Dispose;
end;
type
Camera2D = class(Surface)
end;
type
Texture = class(Surface)
protected
_texture : PSDL_Texture;
public
property Texture : PSDL_Texture read _texture write _texture;
constructor Initialize;
destructor Dispose;
end;
type
StaticTexture = class(Texture)
public
procedure Draw(renderer : PSDL_Renderer); override;
constructor Initialize;
destructor Dispose;
end;
type {Pointeurs sur types}
PRenderingObject = ^RenderingObject;
PSurface = ^Surface;
PStaticTexture = ^StaticTexture;
type
Group = class(TInterfacedObject, IContainer)
private
_children : TList;
_position : PSDL_Rect;
public
procedure Update(elapsedTime : real);
procedure Draw(renderer : PSDL_Renderer);
procedure AddChild(surface : PSurface);
procedure SetPosition(x, y : integer);
function GetPosition():PSDL_Rect;
constructor Initialize;
destructor Dispose;
end;
implementation
{Begin RenderingObject implementation}
constructor RenderingObject.Initialize;
begin
new(_rectangle);
end;
destructor RenderingObject.Dispose;
begin
end;
function RenderingObject.GetPosition:PSDL_Point;
begin
new(GetPosition);
GetPosition^.x := _rectangle^.x;
GetPosition^.y := _rectangle^.y;
end;
procedure RenderingObject.SetPosition(x, y: integer);
begin
_rectangle^.x := x;
_rectangle^.y := y;
end;
function RenderingObject.GetSize:PSDL_Point;
begin
new(GetSize);
GetSize^.x := _rectangle^.h;
GetSize^.y := _rectangle^.w;
end;
procedure RenderingObject.SetSize(h, w : integer);
begin
_rectangle^.h := h;
_rectangle^.w := w;
end;
procedure RenderingObject.Update(elapsedTime : real);
begin
end;
procedure RenderingObject.Draw(renderer : PSDL_Renderer);
begin
end;
{End RenderingObject implementation}
{Begin Group implementation}
constructor Group.Initialize;
begin
_children := TList.Create;
new(_position);
end;
destructor Group.Dispose;
begin
end;
procedure Group.Update(elapsedTime : real);
var
i : integer;
begin
for i := 0 to _children.count - 1 do
begin
PSurface(_children[i])^.Update(elapsedTime);
end;
end;
procedure Group.Draw(renderer : PSDL_Renderer);
var
i : integer;
begin
for i := 0 to _children.count - 1 do
begin
PSurface(_children[i])^.Draw(renderer);
end;
end;
procedure Group.AddChild(surface : PSurface);
begin
_children.Add(surface);
surface^.LinkContainer(PIContainer(self));
end;
procedure Group.SetPosition(x, y : integer);
begin
_position^.x := x;
_position^.y := y;
end;
function Group.GetPosition:PSDL_Rect;
begin
new(GetPosition);
GetPosition^.x := _position^.x;
GetPosition^.y := _position^.y;
end;
{End Group implementation}
{Begin Surface implementation}
constructor Surface.Initialize;
begin
inherited;
new(_origin);
_origin^.x := 0;
_origin^.y := 0;
new(_worldOrigin);
_worldOrigin^.x := 0;
_worldOrigin^.y := 0;
_rotation := 0;
_flip := SDL_FLIP_NONE;
end;
procedure Surface.LinkContainer(container : PIContainer);
begin
Parent := container;
end;
destructor Surface.Dispose;
begin
end;
{End Surface implementation}
{Begin Texture implementation}
constructor Texture.Initialize;
begin
inherited;
end;
destructor Texture.Dispose;
begin
end;
{End Texture implementation}
{Begin StaticTexture implementation}
constructor StaticTexture.Initialize;
begin
inherited;
end;
destructor StaticTexture.Dispose;
begin
end;
procedure StaticTexture.Draw(renderer : PSDL_Renderer);
begin
_worldOrigin^.x := _rectangle^.x;
_worldOrigin^.y := _rectangle^.y;
_worldOrigin^.w := _rectangle^.w;
_worldOrigin^.h := _rectangle^.h;
if Parent <> nil then
begin
_worldOrigin^.x := _worldOrigin^.x + Group(_parent).GetPosition()^.x;
_worldOrigin^.y := _worldOrigin^.y + Group(_parent).GetPosition()^.y;
end;
SDL_RenderCopyEx(renderer, _texture, nil, _worldOrigin, _rotation, _origin, _flip);
end;
{End StaticTexture implementation}
end. |
