Hey guys,
First of all a big thank you to all that have contributed to this
list, its helped me no end!
Its my first time here so apologies if this is a dumb question or Ive
completely over looked something??
I'm a little mystified.... when I do a meshFn.closestIntersection() I
get hitPoint.x = 0?
It seems to find y and z fine?
Just to show a simplified example the code below is a slightly adapted
version from:: [Maya-Python Club:1743] Re: Need an itterator HELP ! !
import maya.cmds as mc
import maya.OpenMaya as om
mc.file(new=True, force=True)
mc.polyCube()
mc.spaceLocator(name='originLOC')
mc.spaceLocator(name='finishLOC')
mc.spaceLocator(name='hitLOC')
mc.setAttr('originLOC.tx', 5)
mc.setAttr('finishLOC.tx', 3)
mc.setAttr('hitLOC.tz', 5)
## create 2 locators named start and finish to angle the ray points
startWP = mc.xform('originLOC',q=1,rp=1,ws=1)
FinishWP = mc.xform('finishLOC',q=1,rp=1,ws=1)
vectBtwPnts= ((startWP [0] -FinishWP [0])*-1), ((startWP [1] -
FinishWP [1])*-1), ((startWP [2] -FinishWP [2])*-1)
vectorToFinish =
om.MFloatVector(vectBtwPnts[0],vectBtwPnts[1],vectBtwPnts[2])
def nameToNode(name ):
selectionList = om.MSelectionList()
selectionList.add( name )
node = om.MObject()
selectionList.getDependNode( 0, node )
return node
#retireves the right DAG node for selected objects
def nameToDag( name ):
selectionList = om.MSelectionList()
selectionList.add( name )
node = om.MDagPath()
selectionList.getDagPath( 0, node )
return node
## this is where the itterator is needed ? ?
dag = nameToDag(" pCube1 " )
meshFn = om.MFnMesh()
meshFn.setObject( dag )
raySource = om.MFloatPoint(startWP[0],startWP[1],startWP[2])
rayDirection = vectorToFinish
rayDirection = rayDirection.normal()
hitFacePtr = om.MScriptUtil().asIntPtr()
hitPoint = om.MFloatPoint()
idsSorted = False
testBothDirections = False
faceIds = None
triIds = None
accelParams = None
hitRayParam = None
hitTriangle = None
hitBary1 = None
hitBary2 = None
maxParamPtr = 99999999
worldSpace = om.MSpace.kWorld
hit = meshFn.closestIntersection(raySource,
rayDirection,
faceIds,
triIds,
idsSorted,
worldSpace,
maxParamPtr,
testBothDirections,
accelParams,
hitPoint,
hitRayParam,
hitFacePtr,
hitTriangle,
hitBary1,
hitBary2)
if hit:
hitFace = om.MScriptUtil ( hitFacePtr ).asInt()
faceNumber = hitFace
vector = om.MVector()
NormalFn = om.MFnMesh(dag)
NormalFn.getPolygonNormal(faceNumber, vector, worldSpace)
hitFace = om.MScriptUtil ( hitFacePtr ).asInt()
print "The hit point in X is %f " %hitPoint[0] # result 0?
print "The hit point in Y is %f " %hitPoint[1]
print "The hit point in Z is %f " %hitPoint[2]
print "The number of the face hit is %d" %hitFace
print "The normal of the hit face is %f in x" %vector.x
print "The normal of the hit face is %f in y" %vector.y
print "The normal of the hit face is %f in z" %vector.z
mc.setAttr("hitLOC.tx", hitPoint[0]) # result 0?
mc.setAttr("hitLOC.ty", hitPoint[1])
mc.setAttr("hitLOC.tz", hitPoint[2])
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