IGNORE MY LAST POST !. sorted it now i was just being thick. Big
thanks to you all. Still learning all this stuff but i m picking it up
quite well, thanks for the iteration code, its good to look at some
examples. Here is the working collision script. just put in the 2
locators start and finish, aim it at any mesh and bingo it ll print
out co ordiantes normals and faces of hits.
next step is to save this all into a vector array and work out which
is the first collision.
again a BIG tanks to you all, you are the maya gods . . .
import maya.cmds as mc
import maya.OpenMaya as om
iter = om.MItDag(om.MItDag.kDepthFirst, om.MFn.kMesh)
while not iter.isDone():
iterDagPath = om.MDagPath()
iter.getPath(iterDagPath)
startWP = mc.xform('start',q=1,rp=1,ws=1)
FinishWP = mc.xform('finish',q=1,rp=1,ws=1)
vectBtwPnts= ((startWP [0] -FinishWP [0])*-1), ((startWP [1] -
FinishWP [1])*-1), ((startWP [2] -FinishWP [2])*-1)
VectorFloat = om.MFloatVector(vectBtwPnts[0],vectBtwPnts
[1],vectBtwPnts[2])
meshFn = om.MFnMesh()
meshFn.setObject( iterDagPath )
raySource = om.MFloatPoint(startWP[0],startWP[1],startWP[2])
rayDirection = VectorFloat
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(iterDagPath)
NormalFn.getPolygonNormal(faceNumber, vector, worldSpace)
hitFace = om.MScriptUtil ( hitFacePtr ).asInt()
print iter.partialPathName()
print "The hit point in X is %f " %hitPoint[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
iter.next()
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Yours,
Maya-Python Club Team.
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