Difference between revisions of "Fixture:rayCast"

(I hope this explains the function better.)
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{{param|number|y1|The y position of the ray starting point.}}
 
{{param|number|y1|The y position of the ray starting point.}}
 
{{param|number|x2|The x position of the ray end point.}}
 
{{param|number|x2|The x position of the ray end point.}}
{{param|number|y1|The y position of the ray end point.}}
+
{{param|number|y2|The y position of the ray end point.}}
 
{{param|number|maxFraction|The maximum distance the ray is going to travel as a factor of the input vector length.}}
 
{{param|number|maxFraction|The maximum distance the ray is going to travel as a factor of the input vector length.}}
 
{{param|number|childIndex (1)|The index of the child the ray gets cast against.}}
 
{{param|number|childIndex (1)|The index of the child the ray gets cast against.}}

Revision as of 14:59, 5 May 2012

Available since LÖVE 0.8.0
This method is not supported in earlier versions.

Casts a ray against the shape of the fixture.

O.png There is a bug in 0.8.0 where the normal vector returned by this function gets scaled by love.physics.getMeter.  


Function

Synopsis

xn, yn, fraction = Fixture:rayCast( x1, y1, x2, y2, maxFraction, childIndex )

Arguments

number x1
The x position of the ray starting point.
number y1
The y position of the ray starting point.
number x2
The x position of the ray end point.
number y2
The y position of the ray end point.
number maxFraction
The maximum distance the ray is going to travel as a factor of the input vector length.
number childIndex (1)
The index of the child the ray gets cast against.

Returns

number xn
The x component of the normal vector of the edge where the ray hit the shape.
number yn
The y component of the normal vector of the edge where the ray hit the shape.
number fraction
The position on the input vector where the intersection happened as a factor of the input vector length.

See Also


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