PDA

View Full Version : Altering materials in a loop...

cbass
03-27-2008, 06:40 AM
Hi Everyone,



I’m trying to figure out how to assign a material color to scripted objects. I got it to work in the following…



----------------------------------------------------------


for i=1 to 10 do

(

b = box()
move b [0,i*40,0]

c=standardMaterial()
c.Diffuse=color 250 (i*10) 75
b.Material=c

)


----------------------------------------------------------


However the following does not work…


----------------------------------------------------------


a = 1.0
b = 1.9
c = 1.0
d = 1.0
x = 0.1
y = 0.1
z = 0.1


for i = 1 to 220 do



(


xnew = sin(y*b)+c*sin(x*b)
ynew = sin(x*a)+d*sin(y*a)
znew = cos(x*c)+d*sin(y*c)
x = xnew*55
y = ynew*55
z = znew*55
s= Box length:(random 10 50) width:(random 10 50) height:(random 10 50)
s.lengthsegs = 5
s.widthsegs = 5
s.heightsegs = 5
addModifier s (turbosmooth iterations: 2)
move s [x,y,z]



c=standardMaterial()
c.Diffuse=color 250 (i*10) 75
s.Material=c

)


----------------------------------------------------------






I keep getting the error



-- Error occurred in i loop

-- No ""*"" function for Standardmaterial:Standard



and I'm not sure why. If I remove the last three lines, it works fine (although obviously I don't get the color I'm looking for). Why would adding the material information cause an error in the loop? I’m sure it’s a simple explanation. Its just beyond me right now.

Any suggestions?


TIA,


Carlo
Zbuffer
03-27-2008, 07:35 AM
that's because the variable c is used twice in the loop
first you say c = 1.0 (outside the loop), then
c=standardMaterial()

so it errors in the second iteration of the loop on line
znew = cos(x*c)+d*sin(y*c)
since now c is a standard material
cbass
03-27-2008, 08:36 AM
Zbuffer,

I can't believe I didn't spot that.

I guess such are the dangers of using "a" "b" "c" and other nondescript names for variables.

Thank you so much for your help. I will sleep well tonight!


Carlo
CGTalk Moderation
03-27-2008, 08:36 AM
This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.