Difference between revisions of "R3d.World:raycast"

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Ray casting can be performed against multiple bodies, a single body or any proxy shape of a given body.
 
Ray casting can be performed against multiple bodies, a single body or any proxy shape of a given body.
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<source lang="lua">
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<syntaxhighlight lang="lua">
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r3d.World:raycast(sx, sy, sz, ex, ey, ez, callback, category)
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r3d.World:raycast(sx,sy,sz,ex,ey,ez,callback[,category])
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</source>
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</syntaxhighlight>
  
 
=== Parameters ===
 
=== Parameters ===
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=== Example ===
 
=== Example ===
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<source lang="lua">
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<syntaxhighlight lang="lua">
 
function raycastcallback(c)
 
function raycastcallback(c)
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print("world point coords:", c.worldPoint[1], c.worldPoint[2], c.worldPoint[3])
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-- fixture: table
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-- body: table
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-- worldNormal: table
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-- hitFraction: number
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-- worldPoint: table
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-- triangleIndex: number
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for k, v in pairs(c.fixture) do
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print("fixture:", k, v)
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end
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print("body id:", c.body.id)
 
print("world normal coords:", c.worldNormal[1], c.worldNormal[2], c.worldNormal[3])
 
print("world normal coords:", c.worldNormal[1], c.worldNormal[2], c.worldNormal[3])
 
print("hit fraction:", c.hitFraction)
 
print("hit fraction:", c.hitFraction)
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print("mesh subpart:", c.meshSubpart)
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print("world point coords:", c.worldPoint[1], c.worldPoint[2], c.worldPoint[3])
 
print("triangle index:", c.triangleIndex)
 
print("triangle index:", c.triangleIndex)
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for k, v in pairs(c.body) do
 
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print("body:", k, v)
 
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end
 
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for k, v in pairs(c.fixture) do
 
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print("fixture:", k, v)
 
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end
 
 
end
 
end
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local ray1 = world:raycast(0, 0, 0, 0, 10, -32, raycastcallback)
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world:raycast(0, 0, 0, 0, 10, -32, raycastcallback)
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</source>
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</syntaxhighlight>
  
 
{{R3d.World}}
 
{{R3d.World}}

Revision as of 02:49, 18 December 2025

Available since: Gideros 2019.10
Class: R3d.World

Description

You can use ReactPhysics3D to test intersection between a ray and the bodies of the world you have created.

Ray casting can be performed against multiple bodies, a single body or any proxy shape of a given body. 

r3d.World:raycast(sx,sy,sz,ex,ey,ez,callback[,category])

Parameters

sx: (number) the starting position of the raycast in the world x axis
sy: (number) the starting position of the raycast in the world y axis
sz: (number) the starting position of the raycast in the world z axis
ex: (number) the ending position of the raycast in the world x axis
ey: (number) the ending position of the raycast in the world y axis
ez: (number) the ending position of the raycast in the world z axis
callback: (function) the callback function
category: (number) bit mask for collision filtering optional

Example

function raycastcallback(c)
	-- fixture: table
	-- body: table
	-- worldNormal: table
	-- hitFraction: number
	-- worldPoint: table
	-- triangleIndex: number
	for k, v in pairs(c.fixture) do
		print("fixture:", k, v)
	end
	print("body id:", c.body.id)
	print("world normal coords:", c.worldNormal[1], c.worldNormal[2], c.worldNormal[3])
	print("hit fraction:", c.hitFraction)
	print("world point coords:", c.worldPoint[1], c.worldPoint[2], c.worldPoint[3])
	print("triangle index:", c.triangleIndex)
end
world:raycast(0, 0, 0, 0, 10, -32, raycastcallback)


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