14 lines
1.7 KiB
Markdown
14 lines
1.7 KiB
Markdown
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# Yugine 2D Tooling
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## 2D game editing
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2D game levels take place on a 2D plane. Objects can be on layers from -127 to 127. When you start editing, you begin with placing objects on layer 0.This makes it easy to add foreground and background graphics. In addition, each layer has a parallax value from -127 to 127. A parallax value of 1 means the sprite moves at a 1:1 ratio with the camera, ie, if the camera "moves" one pixel to the right, the object will appear to move 1 pixel to the left across the screen. Positive parallax values denote faster movement, so a parallax value of 100 indicates the object will move 100 pixels to the left if the camera moves 1 pixel to the right. Negative parallax values indicate slower movement, so a value of -100 indicates that the object will move 1 pixel to the left for every 100 pixels to the right the camera moves. A parallax value of 0 indicates the object will not move when the camera moves. This might be used for static stars in the background of a space level, for example.
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If two sprites on the same layer overlap, it is undefined behavior. Be sure they do not overlap!
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Instead of selecting what layer each element is on, it might be useful to group them. Gameobject fields can be set to a specific layer. You can choose to have each object's layer determined by its type instead of individually. For example, in a platformer it often makes sense to have all Monsters and the Player on the same layer.
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There are three viewing modes in 2D mode:
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- Game view: how the level will be seen when the game is run.
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- Layer view: View only one layer at a time.
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- Onion view: View a selected layer; all layers behind that layer are drawn as normal, and all layers on top are drawn transparently.
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