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probably a lot of people here have tackled this one
allready,
I did search in the archive and google, and a lot
came up, but it quickly turns complicated, with matrices and all.
just hope there is a simple answer...
I would like to place objects on a mesh's points,
oriented according to the normal.
getting to the positions is easy enough, finding
the normals too.
but going from the normals to an orientation is
less so.
note that I do not want to create a cluster per
point, and use objtocluster constraint, which is going to give me the result I
want.
in the end I want to be doing this with a lot of
objects and also particles so making thousands of constraints doesnt seem right
if all I'm after is "just a rotation"
any hints in where Im going wrong, and wether this
is the right approach to the problem?
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set sel = selection(0)
set oGeometry = sel.activeprimitive.geometry
set oPoints = oGeometry.Points
for each pnt in oPoints
set
("name" & i)
oNull.Kinematics.local.parameters("posx").value = pnt.position.x
oNull.Kinematics.local.parameters("posy").value = pnt.position.y
oNull.Kinematics.local.parameters("posz").value = pnt.position.z
oNull.Kinematics.global.parameters("rotx").value = pnt.normal.x
oNull.Kinematics.global.parameters("roty").value = pnt.normal.y
oNull.Kinematics.global.parameters("rotz").value = pnt.normal.z
next
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now this is obviously no good for the
normals/orientations
the normal is a vector, and the rotation are angles, so I
cant just replace one with the other right?
I tried with radianstodegrees:
oNull.Kinematics.global.parameters("rotx").value =
xsimath.radianstodegrees(pnt.normal.x)
oNull.Kinematics.global.parameters("roty").value =
xsimath.radianstodegrees(pnt.normal.y)
oNull.Kinematics.global.parameters("rotz").value =
xsimath.radianstodegrees(pnt.normal.z)
but that doesnt look right either
so looked all over in the scripting reference
and noticed the existence of setfromXYZangles and
GetXYZanglesValues.
are these what I need?
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set sel = selection(0)
set oGeometry = sel.activeprimitive.geometry
set oPoints = oGeometry.Points
for each pnt in oPoints
set ("name" &
i)
oNull.Kinematics.local.parameters("posx").value =
pnt.position.x
oNull.Kinematics.local.parameters("posy").value =
pnt.position.y
oNull.Kinematics.local.parameters("posz").value =
pnt.position.z
set oVector = XSIMath.CreateVector3
oVector.x = pnt.normal.x
oVector.y = pnt.normal.y
oVector.z = pnt.normal.z
set ROT = XSIMath.CreateRotation
ROT.SetfromXYZAngles oVector
ROT.GetXYZAnglesValues X, Y, Z
oNull.Kinematics.global.parameters("rotx").value =
xsimath.radianstodegrees(X)
oNull.Kinematics.global.parameters("roty").value =
xsimath.radianstodegrees(Y)
oNull.Kinematics.global.parameters("rotz").value =
xsimath.radianstodegrees(Z)
next
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its different and doesnt look right either?
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