Difference between revisions of "B2.setScale"
From GiderosMobile
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Gideros uses an internal scale system to convert between meters and pixels. By default, the value of this scale is 30<br /> | Gideros uses an internal scale system to convert between meters and pixels. By default, the value of this scale is 30<br /> | ||
which means 1 meter = 30 pixels. This is a global value and effects all the physics system. Therefore, it is recommended to set this<br /> | which means 1 meter = 30 pixels. This is a global value and effects all the physics system. Therefore, it is recommended to set this<br /> | ||
| − | value once before any physical objects are instantiated (e.g. right after calling | + | value once before any physical objects are instantiated (e.g. right after calling [[require "box2d"]])<br /> |
<br /></translate> | <br /></translate> | ||
<source lang="lua"> | <source lang="lua"> | ||
Revision as of 14:56, 23 August 2018
Available since: Gideros 2011.6
Description
Box2D is tuned for MKS (meters-kilogram-second) units and the size of moving objects should roughly between 0.1 and 10 meters.
If you directly use the pixels as your units, unfortunately this will lead to a poor simulation and possibly weird behavior.
Gideros uses an internal scale system to convert between meters and pixels. By default, the value of this scale is 30
which means 1 meter = 30 pixels. This is a global value and effects all the physics system. Therefore, it is recommended to set this
value once before any physical objects are instantiated (e.g. right after calling require "box2d")
b2.setScale(scale)
Parameters
scale: (number) - the global pixels to meters scale
