I learned how to do it with position and verts.
Now I would like to birth at the center of faces… I’m sure I’m missing something simple.
–Sorry for the massive Tabage. They seem to grow in the thread post…
on ChannelsUsed pCont do
(
pCont.useTime = true
pCont.usePosition = true
pCont.useOrientation = true
)
on Init pCont do
(
global baseObj = $Sphere01
)
on Proceed pCont do
(
if baseObj != undefined do
(
t = pCont.getTimeStart() as float
NumFaces = getNumFaces baseObj
if t < 0 do
(
for i = 1 to NumFaces do
(
pCont.AddParticle()
pCont.particleIndex = pCont.NumParticles()
pCont.particlePosition = polyop.getFaceCenter baseObj i
pCont.particleOrientation = polyop.getFaceNormal baseObj i
)
)
)
)
on Release pCont do ()
I have learned how to birth particles (in a birth script in PFLOW) to the position of verts of an EditablePoly. I would like to learn how to birth to the center of faces with the particles aligned to the normals of the face
i think to birth i is the same way in vertex,
but becarefull to deal with 3D vectors to (get orientation XYZ) based on face normals poly.
researchs :
http://forums.cgsociety.org/showthread.php?f=98&t=310605&highlight=face+normal+vectors
http://forums.cgsociety.org/showthread.php?f=98&t=617614&highlight=face+normal+vectors
http://forums.cgsociety.org/showthread.php?f=98&t=509556&highlight=face+normal+vectors
http://forums.cgsociety.org/showthread.php?f=98&t=337793&highlight=face+normal+vectors
check the help about it too.yup, i’ve dug through the help and I’ve read most of those threads.
I don’t know how the Maya Mel thread will help me with MXS specifics. I understand what the procedure is:
Define the mesh
Count the faces
For i in 1 to number of faces do
add a particle
set the particle index
set the position of the particle to the position of the face
set the orientation of th eparticle to the normal of the face
I didn’t find a polyop.faceTM or anything like that.
Can you see what is wrong with my script in the first post?
Thanks for all your help.
Almost there…
on ChannelsUsed pCont do
(
pCont.useTime = true
pCont.usePosition = true
pCont.useTM = true
)
on Init pCont do
(
baseObj = $Sphere01
)
on Proceed pCont do
(
if baseObj != undefined do
(
t = pCont.getTimeStart() as float
NumFaces = getNumFaces baseObj
if t < 0 do
(
for i = 1 to NumFaces do
(
pCont.AddParticle()
pCont.particleIndex = pCont.NumParticles()
polyCenter = (polyop.getFaceCenter baseObj i)
pCont.particlePosition = polyCenter
faceNormal = (in coordsys baseObj polyop.getFaceNormal baseObj i)
worldUpVector = [0,0,1]
rightVector = normalize (cross worldUpVector faceNormal)
upVector = normalize (cross rightVector faceNormal)
theMatrix = matrix3 rightVector upVector faceNormal polyCenter
pCont.particleTM = theMatrix
)
)
)
)
on Release pCont do ()
You could rotate them the easy way by adding a rotation speed space follow and speed by surface out of normal on a speed like 0.01 in the event and then send out and do the rest of the flow.
uh… oh yeah… thanks. then all I need from the script is the position. I got so caught up in the birth script i fogot about the basics. I learned a bit in the process though. Something is still not right with my little TM calculation.