Libgdx Scene2d Actor System Overview Diagram

01-libgdx-sprite.md

• most basic way to display(draw) an image onscreen
• can be done with either Stateless(Texture, TextureRegion) or Stateful(Sprite)
• with the Stateless(Texture, TextureRegion) approach -> you need to specify the x,y coordinates on each draw call
• with the Stateful(Sprite) approach -> the needed x,y coordinates are saved into the Sprite object itself

01-libgdx-sprite.svg

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<!-- Json&#45;&gt;TextureAtlas -->
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<!-- TextureRegion -->
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<!-- Stateless -->
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<!-- Stateful -->
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<!-- Stateless&#45;&gt;Texture -->
<g id="edge17" class="edge"><title>Stateless&#45;&gt;Texture</title>
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<!-- Stateless&#45;&gt;TextureRegion -->
<g id="edge16" class="edge"><title>Stateless&#45;&gt;TextureRegion</title>
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<text text-anchor="middle" x="179.472" y="-114" font-family="Times,serif" font-size="14.00">Draw</text>
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<!-- Stateless&#45;&gt;Stateful -->
<g id="edge18" class="edge"><title>Stateless&#45;&gt;Stateful</title>
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<!-- Stateful&#45;&gt;Sprite -->
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02-libgdx-actor.md

• Actor extends Sprite and allows for additional functionality like mouse hover/click
• the (optional) Skin can be used to modify the viewing part the Actor actor depending on the actors state. Example: Button class changes the image if it is hovered, clicked, disabled, etc and the ButtonStyle allows to define a different image for each state
• allows the usage of Actions -> to manipulate/animate(move,flip,etc..) Actors on the Stage

02-libgdx-actor.svg

03-libgdx-layout.md

• allows to stick together Widgets(Buttons,Labels,etc) to define an UI

03-libgdx-layout.svg