Difference between revisions of "B2.setScale"

From GiderosMobile
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'''<translate>Available since</translate>:''' Gideros 2011.6<br/>
 
'''<translate>Available since</translate>:''' Gideros 2011.6<br/>
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'''<translate>Class</translate>:''' [[Special:MyLanguage/b2|b2]]<br/>
 
=== <translate>Description</translate> ===
 
=== <translate>Description</translate> ===
 
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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 [[Special:MyLanguage/require &quot;box2d&quot;|require &quot;box2d&quot;]])<br />
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value once before any physical objects are instantiated (e.g. right after calling `require &quot;box2d&quot;`)<br />
 
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<source lang="lua">
 
<source lang="lua">

Revision as of 09:29, 24 August 2018

Available since: Gideros 2011.6
Class: b2

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