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Line 937:
Line 937: − + + + + + − <!-- code start-->+ − <pre style="margin-left:20px; font-size:1.4em; background-color:#fdfdfd">+ − self = physics.Body:setVelocityFunc(func)+ − </pre><!-- code end-->+ − + − − <!-- table start --> − − <!-- header row start --> − − − + − + − + − + − + − + − + − + − + − + + + − <br/>+ − Sets the velocity function of the body. The velocity function must be a function that accepts a Body, a gravity [[#vector|vector]], a numeric damping factor, and a time step value. The function should call body:updateVelocity to adjust the velocity of the body. − Returns the Body. − + − |-+ − + + − <!-- code start-->+ − <pre style="margin-left:20px; font-size:1.4em; background-color:#fdfdfd"> − function sampleVelocityFunc(body, gravity, damping, dt) − local pos = body:pos() − local sqdist = pos:lengthsq() − local g = pos:mult(-GravityStrength / (sqdist * math.sqrt(sqdist))) − body:updateVelocity(g, damping, dt) − end − body:setVelocityFunc(sampleVelocityFunc)+ − </pre><!-- code end--> + − </div>+ − |} − <br/> − Introduced in platform.apiLevel = '2.0'+ − ----
no edit summary
----
----
===== setVelocityFunc =====
===== setVelocityFunc =====
<!-- code start-->
<pre style="margin-left:20px; font-size:1.4em; background-color:#fdfdfd">self = physics.Body:setVelocityFunc(func)
</pre><!-- code end-->
<!-- table start -->
{| border="1" width="100%" cellspacing="0" cellpadding="4" style="border-color:#eee" class="wikitable"
|-
! Parameter
! Type
! Description <!-- header row end -->
{| border=1 width="100%" cellspacing="0" cellpadding="4" style="border-color:#eee" class="wikitable"
! Parameter !! Type !! Description
<!-- header row end -->
|-
|-
| self
| self
| '''in''' physics.Body
| '''in''' physics.Body
| The input Body
| The input Body
|-
|-
| func
| func
| '''in''' function(body, grav, damping, dt)
| '''in''' function(body, grav, damping, dt)
| A callback function that updates the velocity of the Body on each time step
| A callback function that updates the velocity of the Body on each time step
|-
|-
| self
| self
| '''out''' physics.Body
| '''out''' physics.Body
| The input Body is returned as the output
| The input Body is returned as the output
|}<!-- table end -->
|}
<!-- table end -->
<br> Sets the velocity function of the body. The velocity function must be a function that accepts a Body, a gravity [[#vector|vector]], a numeric damping factor, and a time step value. The function should call body:updateVelocity to adjust the velocity of the body.
Returns the Body.
{| width="100%" style="padding: 20px; margin-left:20px; border:solid; border-color:#aaa; border-width:0px; text-align:left; background-color:#ddffdd;"
{| width="100%" style="padding: 20px; margin-left:20px; border:solid; border-color:#aaa; border-width:0px; text-align:left; background-color:#ddffdd;"
|-
|-
| <span style="color:#00AA00">'''TIP''':</span> '''Example'''<hr>
|
<span style="color:#00AA00">'''TIP''':</span> '''Example'''
<div style="white-space: pre">
<br>function sampleVelocityFunc(body, gravity, damping, dt)<br>local pos = body:pos()<br>local sqdist = pos:lengthsq()<br>local g = pos:mult(-GravityStrength / (sqdist * math.sqrt(sqdist)))<br>body:updateVelocity(g, damping, dt)<br>end
body:setVelocityFunc(sampleVelocityFunc)<br><br>
----
|}
<br>
Introduced in platform.apiLevel = '2.0'
----
===== setVLimit =====
===== setVLimit =====
