H2D

Heaps' 2D API (package `h2d`) defines a collection of classes for 2D graphics. The following sections cover its usage.

• Introduction

  The code samples in the first pages in the H2D section are coded without any external resources allowing to just copy and paste the code and compiling it directly on your machine...

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• Object

  Like shown previously in the introduction to give our Heaps application visual (2D) content we need classes that are built upon h2d.Object...

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• Scenes

  In the previous sections we already used s2d which represents the active current scene rendered by the hxd.App...

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• Events and interaction

  Making objects interactive (with the mouse) is done by creating a h2d.Interactive instance. You provide it with an interaction area and attach it to a sprite. This can be used to implement buttons for the UI, but also for any other object that responds to being clicked or hovered over (for instance, an old wooden chest opened by mouse or an enemy the player hits by clicking on it)...

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• Drawable

  H2D classes that can display something on screen usually extend the h2d.Drawable class...

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• Graphical surfaces

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• Drawing Tiles

  Tiles can be drawn with multiple approaches, some of which will be discussed below...

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• Optimizing bitmaps

  Some tips:..

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• Filters

  Filters apply to the display tree, so can be used to create screen effects. You can assign a filter to a h2d.Sprite...

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• Shaders

  You can add a Shader in H2D using drawable.addShader...

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• Flow

  The h2d.Flow class allows to properly arrange child objects (h2d.Object)...

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• Creating simple sprites

  To create a sprite we load a h2d.Tile into the RAM. From there we can fetch the tile to instantiate a h2d.Bitmap which can finally be placed inside our scene...

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