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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