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On 15/03/2012 at 00:55, xxxxxxxx wrote:
Hi Luther,
I guess/hope you're doing that operation within the for-loop? Just a hint, why don't you use ~.GetAbsPos() ?
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-Niklas
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On 15/03/2012 at 02:35, xxxxxxxx wrote:
Hi Niklas,
I thought it was the same as GetAbsPos(). Isn't It?
What do you mean by "doing that operation within the for-loop?". for i in range(0,frame) is not a loop?
Luther
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On 15/03/2012 at 06:04, xxxxxxxx wrote:
Hi Luther,
Yes it is, I just wondered why you do it this way. 
Yes it is a for-loop, but I wanted to know if you're calling op.GetMg().off within the for loop or not, i.e.
for i in range(frame) : # same as range(0, frame), better use xrange by the way
GPos = op.GetMg().off
# ...
and not
GPos = op.GetMg().off
for i in range(frame) :
# ...
But that would be too obvious I guess, and anyway, even if you're doing that, it won't work... I just tested it and saw that the position is not updated by just setting the document time, and I don't know how to update it .. I know there is a way to do it, but c4d.EventAdd() nor c4d.GeSyncMessage() seem to fix that... sry 
-niklas
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On 15/03/2012 at 06:40, xxxxxxxx wrote:
In Py SDK, documents -> BaseDocument at the end,
there is a example how to run thru the document.
Cheers
Lennart
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On 15/03/2012 at 07:06, xxxxxxxx wrote:
Hi Niklas,
thank you for your reply and your test...
Anyway, anyone knows the way to update a value in a given frame?
What is wrong in this code?
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import c4d
#Welcome to the world of Python
def main() :
fps = doc.GetFps()
frame = doc.GetTime().GetFrame(doc.GetFps())
obj = op.GetObject()
Distance = []
for i in xrange (0, frame) :
doc.SetTime(c4d.BaseTime(i,fps))
c4d.GeSyncMessage(c4d.EVMSG_TIMECHANGED)
GPos = obj.GetAbsPos()
Distance.append(GPos)
doc.SetTime(c4d.BaseTime(frame,fps))
print Distance # return a list of the same vector (in this case the position in the current frame)
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Cheers
Luther
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On 15/03/2012 at 07:09, xxxxxxxx wrote:
Ops...
Hi Lennart, I wrote before read your post... I wil read the Sdk soon.
Thank you
Luther
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On 15/03/2012 at 10:52, xxxxxxxx wrote:
@lennart: Ah right! I knew I saw it somewhere! Your mind is genius ;O
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On 15/03/2012 at 11:37, xxxxxxxx wrote:
Hi Lennart, Niklas,
Its seems to me that it doesn't works... When I call "c4d.DrawViews" Cinema freeze.
May be I wrote somenthing wrong...
Here's my code:
_
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import c4d
from c4d import documents
def main() :
fps = doc.GetFps()
frame = doc.GetTime().GetFrame(doc.GetFps())
obj = op.GetObject()
Distance = []
for i in xrange (0, frame) :
c4d.StatusSetBar(100*(i-0)/(frame-0))
doc.SetTime(c4d.BaseTime(i,fps))
c4d.DrawViews(c4d.DRAWFLAGS_ONLY_ACTIVE_VIEW|c4d.DRAWFLAGS_NO_THREAD|c4d.DRAWFLAGS_NO_REDUCTION|c4d.DRAWFLAGS_STATICBREAK)
GPos = obj.GetAbsPos()
c4d.GeSyncMessage(c4d.EVMSG_TIMECHANGED)
Distance.append(GPos)
doc.SetTime(c4d.BaseTime(frame,fps))
c4d.EventAdd(c4d.EVENT_ANIMATE)
c4d.StatusClear()
print Distance
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On 15/03/2012 at 12:56, xxxxxxxx wrote:
That example is for a Command setup, not runtime/expression.
Typically to write to file and/or set keyframes etc.
If you need to check object position at different frame(s) from current
at runtime you might need to look into/use AnimateObject()
Cheers
Lennart
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On 15/03/2012 at 13:06, xxxxxxxx wrote:
So you want to compute the distance an object traveled within a PythonTag? Why didn't you say so earlier? 
I don't know why you want to store the distance between each frame in a list, anyway, just create a global-variable and store your data there. Iterating over the full timeline each frame is quite imperformant..
import c4d
data = dict( distance = 0,
prevPos = None )
def main() :
position = op.GetOrigin().GetAbsPos()
# Check for `None` explicit because `prevPos` could
# be `c4d.Vector(0)` which evaluates to `False`, too.
if data['prevPos'] is None:
pass
else:
data['distance'] += (position - data['prevPos']).GetLength()
data['prevPos'] = position
print data['distance']
-Niklas
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On 15/03/2012 at 13:31, xxxxxxxx wrote:
@ Lennart: Thanks for your reply, I will look immediately
@ Niklas: wow, you save my life 
Thank you!!!!
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On 15/03/2012 at 13:54, xxxxxxxx wrote:
For a bit of trivia in the matter, using the following
in a Py Generator (Optimize Cache Off) will animate
an animated object per frame and generate a spline of the path
and read the total length
Cheers
Lennart
import c4d
from c4d.utils import SplineLengthData
def main() :
fps = doc.GetFps()
doctime = doc.GetTime()
currentframe = doctime.GetFrame(fps)
start = doc.GetMinTime().GetFrame(fps)
end = doc.GetMaxTime().GetFrame(fps)
pspline = c4d.BaseObject(c4d.Ospline)
pspline.ResizeObject(end,0)
obj = doc.SearchObject('Cube')# <- Animated Object
for i in xrange(end) :
doc.AnimateObject(obj,c4d.BaseTime(i, fps),c4d.ANIMATEFLAGS_0)
pspline.SetPoint(i,obj.GetAbsPos())
pspline.Message(c4d.MSG_UPDATE)
sld = SplineLengthData()
sld.Init(pspline,0)
tot = sld.GetLength()
print tot
sld.Free()
# Place obj back on track again
doc.AnimateObject(obj,c4d.BaseTime(currentframe,fps),c4d.ANIMATEFLAGS_0)
return pspline
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On 15/03/2012 at 15:30, xxxxxxxx wrote:
wow Lennart, I'm touched
Thank you so much
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On 16/03/2012 at 04:21, xxxxxxxx wrote:
Hi Lennart,
just to know, why this code doesn't work fine now? The "Distance"list store alway the same vector again...
import c4d
#Welcome to the world of Python
def main() :
fps = doc.GetFps()
frame = doc.GetTime().GetFrame(doc.GetFps())
obj = op.GetObject()
Distance = []
for i in xrange (frame) :
doc.AnimateObject(obj,c4d.BaseTime(i, fps),c4d.ANIMATEFLAGS_0)
GPos = obj.GetAbsPos()
Distance.append(GPos)
print Distance
Cheers
Luther
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On 16/03/2012 at 07:00, xxxxxxxx wrote:
Please note that you must not call update functions or change the document structure within the execution functions of objects/tags/materials/... this might lead to crashs. From the c4d.threading module:
For all threaded functions it's forbidden to:
> 1. Add an Event.
> 2. Make any changes to materials.
> 3. Change the structure of objects attached to the scene.
> 4. Change parameters of elements attached to the scene (allowed, but not recommended except for tags).
> 5. Call a Draw function.
> 6. Perform any GUI functionality (e.g. displaying messages, opening dialogs etc.).
> 7. During drawing to do any file operations. (During execution t's allowed.)
> 8. Create undos.
>
Cheers, Sebastian
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On 19/03/2012 at 05:42, xxxxxxxx wrote:
Hi Sebastian,
thanks for your note. Any suggestion for my last post?
Cheers,
Luther
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On 21/03/2012 at 15:09, xxxxxxxx wrote:
The AnimateObject() function needs an animated object as far as I know.
That is , key framed in some fashion.
To run it safer, regarding Sebastians notes, do the AnimateObject() function
on a clone of the object (it is not inserted into the doc).
Cheers
Lennart