hi thanks,
I thought I did this with "worldM = childMatr * matr". But I first tried to
construct a matrix from "pos3d" in order to multiply the matrix.
The code I posted, works somehow, but not what I expect: the locator jumps
to a exposed point on the cube, but not on the nearest point to locator2
2018-08-01 2:46 GMT+02:00 Michael Boon <boons...@gmail.com>:
> I haven't tested this code, but I think it should be a simple matter of
> multiplying the point by the mesh's transform. Something like:
> node = om.MFnDagNode(dag)
> nodeTransform = loc.transformationMatrix()
> worldPos = pos3d * nodeTransform
>
>
> On Tuesday, 31 July 2018 17:53:19 UTC+10, igo rov wrote:
>>
>> Hi,
>>
>> I utilized the MMeshintersector.getClosestPoint() to get closest point
>> on a cube. my problem is, that I can`t make use of it (e.g. set the world
>> position of a locator) because its in local space.
>>
>> - MMeshIntersector.getClosestPoint gives me a MPointOnMesh
>> - MPointOnMesh.point gives me a MFloatPoint
>>
>> I have less knowledge of Matrix, I guess if i would have a child matrix I
>> could multiply with the parent. Her is the full code:
>>
>>
>> import maya.api.OpenMaya as om2
>>
>> selList = om2.MGlobal.getActiveSelectionList()
>> dag = selList.getDagPath(0)
>>
>> matr = dag.inclusiveMatrix()
>>
>> mesh = dag.child(0)
>> meshIntersect = om2.MMeshIntersector()
>> meshIntersect.create(mesh) # documentation says, mesh and matrix as
>> parametres, ...
>> # but matrix throws me an error, without
>> Matrix it works I guess
>>
>> selLoc = om2.MSelectionList()
>> selLoc.add("locator1")
>> dagLoc = selLoc.getDagPath(0)
>> trLoc = om2.MFnTransform(dagLoc)
>> vec = trLoc.translation(4)
>>
>> point = om2.MPoint(vec)
>> pOnMesh = meshIntersect.getClosestPoint(point,1000)
>> pos3d = pOnMesh.point #this gives the local translation of the mesh`s
>> transform as MFloatPoint()
>>
>> # the following is kind of a mess... trying to get the world position of
>> the point in object space. But it gives me wrong results
>>
>> XVal = pos3d.x
>> YVal = pos3d.y
>> ZVal = pos3d.z
>>
>> childMatr = om2.MMatrix()
>> childMatr.setToIdentity()
>> childMatr.setElement(3,0,XVal)
>> childMatr.setElement(3,1,YVal)
>> childMatr.setElement(3,2,ZVal)
>> worldM = childMatr * matr
>>
>> targetX = worldM.getElement(3,0)
>> targetY = worldM.getElement(3,1)
>> targetZ = worldM.getElement(3,2)
>> newVec = om2.MVector(targetX, targetY, targetZ)
>>
>>
>> selLoc2 = om2.MSelectionList()
>> selLoc2.add("locator2")
>> dagLoc2 = selLoc2.getDagPath(0)
>> trLoc2 = om2.MFnTransform(dagLoc2)
>> trLoc2.setTranslation(newVec, 4)
>>
>>
>>
>> --
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