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| | + | {{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.
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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