Shadow Toggle Buttons - Quick Python Question

Coding Python Support
1

Hi Everyone,

I am almost finished working on my scene exporter, but I have struck a couple of small problems.

Does anyone know how to get the state of the shadow toggle in a material or a light through python.

Also I’m am trying to get the value of ADD in a material.

Thanks

Chris

2

The state of the material buttons are stored as a single bitmask. Meaning every bit specifies if a buttons state is off or on.
If you are using 223 or lower, then you have to use the material.Mode value to test if bit 1 (counting from zero) is 1 (on) or 0 (off) to find the the state of the shadow button:


mt = Blender.Material.Get(name)
# bit 1 is 2 to power of 1 which means two in decimal.
# to find the value, mask out everything but this bit with the and operator
# and if the result is nonzero, the button is on
if (mt.Mode & 2):
  print "Shadow is on"
else:
  print "Shadow is off"

in 225 or higer, things are a lot easier:


mt = Blender.Material.get(name)
if 'shadow' in mt.getMode():
  print "Shadow is on"
else:
  print "Shadow is off"

Lamps are similar, they also use a bitmask, the shadow button is the state of bit 0
first in 223:


lp = Blender.Lamp.Get(name)
if (lp.mode & 1):
  print "Shadow is on"
else:
  print "Shadow is off"

and again a lot easier in 225 and higher and the same as for materials:


lp = Blender.Lamp.get(name)
if 'shadow' in lp.getMode():
  print "Shadow is on"
else:
  print "Shadow is off"

Unfortunately, the add slider seems to be one of the forgotten buttons, no access (yet) with either API.

3

Thanks eeshlo

That has totally solved my problem. I had wonder what the mode property was for, all the Blender Python doco I have do no mention it

Thanks again

Chris

4

esh you know where we can find the meaning of each bit ? In other words a bit to button map?

5

Well, long ago I made a little table for this:


# Material Mode bits:
# No Halo:      |  With Halo:
#---------------|--------------
# 0: Traceable  |  Not Used
# 1: Shadow     |  Not Used
# 2: Shadeless  |  Not Used
# 3: Wire       |  Not Used
# 4: VCol Light |  Not Used
# 5: Halo       |  --------
# 6: ZTransp    |  Not Used
# 7: VCol Paint |  Not Used
# 8: ZInvert    |  Rings
# 9: Env        |  Lines
#10: OnlyShadow |  X Alpha
#11: TexFace    |  Star
#12: Not Used   |  HaloTex
#13: Not Used   |  HaloPuno
#14: No Mist    |  Shaded
#15: Not Used   |  Flare

Of course this is not needed any longer, in the new API setMode() and getMode() use strings, which is a lot simpler.