Lighting effects plug-in

Graechan · **Posted:** Sat Oct 22, 2011 6:49 pm **(#1)**

GIMP Version: 2.6.11
Operating System: Windows
OS Version:windows 7
GIMP Experience: Basic Level

List any ERROR messages you received:
none

I am trying to run this in NONINTERACTIVE mode but the PDB settings are confusing and the results
are disappointing,is there anywhere I can go for support on this default plug-in. I have been trying
for a few days, but cannot get even close to the INTERACTIVE result or finding info on the plug-in

Need 2 light sources and bump map as in the water drop tutorial by Molly viewtopic.php?p=31375#p31375

molly · **Joined:** Apr 07, 2010 **Posts:** 14182

Aren't they under your filters > light and shadow > lighting effects >

Oregonian · **Posted:** Sat Oct 22, 2011 8:04 pm **(#3)**

This is the error screen I get if I use lighting effects more than once and the second time it is usually a different image. The filter works ok, it just puts up the error messages. I just close the notice and go on and lighting effects works ok.

Graechan · **Posted:** Sat Oct 22, 2011 8:32 pm **(#4)**

I don't get errors it's just that the PDB's settings are ambiguous when trying to use in script, So my results are poor.

Oregonian · **Posted:** Sat Oct 22, 2011 8:36 pm **(#5)**

Graechan wrote:

List any ERROR messages you received:

Sorry, Graechan. I saw this and ran with it.

Graechan · **Posted:** Sat Oct 22, 2011 8:48 pm **(#6)**

molly wrote:

Aren't they under your filters > light and shadow > lighting effects >

Molly thankyou for your advice but it's the NONINTERACTIVE use of the lighting effects I'm having trouble with. I thought the the Tutorial was worth wrighting a script to but I have stumbled with the lighting effects part in the PDB.

Graechan · **Posted:** Sat Oct 22, 2011 9:49 pm **(#7)**

'O' I thought I would post some images of wher my script is up to first is my image so far.

and after using lighting effects from menu I get this image

I am trying to do same in the script but get nothing like it. This is for light 1,material and bump map I ran it again for light 2(changing settings)

Code: Select all

(plug-in-lighting RUN-NONINTERACTIVE image img-layer img-channel 0 TRUE FALSE 0 1 '(255 255 255) -1 -1 1 1.87 -1.52 1.00 0.50 0.25 0.10 10.00 0 FALSE FALSE FALSE)

Oregonian · **Posted:** Sat Oct 22, 2011 11:26 pm **(#8)**

Graechan wrote:

'O' I thought I would post some images of wher my script is up to first is my image so far.

So is it possible in the script to tell it to use the channel for a bump map? That seems a bit of a rocky place to deal with in a script, to me anyway.

I don't write scripts so I'm not much help.

GnuTux · **Posted:** Sat Oct 22, 2011 11:37 pm **(#9)**

I hope you don't mind but I plugged your values into this commented code block for readability.

Code: Select all

    (plug-in-lighting 
                      1                ; Interactive (0), non-interactive (1)
                      image            ; Input image
                      img-layer        ; Input drawable
                      img-channel      ; Bumpmap drawable (set to 0 if disabled)
                      0                ; Environmentmap drawable (set to 0 if disabled)
                      TRUE             ; Enable bumpmapping (TRUE/FALSE)
                      FALSE            ; Enable envmapping (TRUE/FALSE)
                      0                ; Type of mapping (0=linear,1=log, 2=sinusoidal, 3=spherical)
                      1                ; Type of lightsource (0=point,1=directional,3=spot,4=none)
                      '(255 255 255)   ; Lightsource color (r,g,b)
                     -1                ; Lightsource position x
                     -1                ; Lightsource position y
                      1                ; Lightsource position z
                      1.87             ; Lightsource direction x
                     -1.52             ; Lightsource direction y
                      1.00             ; Lightsource direction z
                      0.50             ; Material ambient intensity (0..1)
                      0.25             ; Material diffuse intensity (0..1)
                      0.10             ; Material diffuse reflectivity (0..1)
                      10               ; Material specular reflectivity (0..1)
                      0                ; Material highlight (0..->), note: it's expotential
                      FALSE            ; Apply antialiasing (TRUE/FALSE)
                      FALSE            ; Create a new image (TRUE/FALSE)
                      FALSE)           ; Make background transparent (TRUE/FALSE)

There is a overview of the plug-in's parameters/arguments here: http://docs.gimp.org/en/plug-in-lighting.html

I haven't been though the tutorial but are you sure the settings match up with what the tutorial uses?

Found some source code for the lighting plug-in here and here.

I do feel you pain when it comes to interactive -vs- non-interactive.

Oregonian · **Posted:** Sat Oct 22, 2011 11:51 pm **(#10)**

Also, there's this tutorial with the lighting settings: http://www.gimpchat.com/viewtopic.php?p=31375#p31375

Graechan · **Posted:** Sun Oct 23, 2011 12:24 am **(#11)**

I have been following the tutorial and checking the result of each step with the video then entering it into my script.

GnuTux · **Posted:** Sun Oct 23, 2011 1:16 am **(#12)**

I double checked your parameter values with the link O posted and they look correct.

Assuming you have the correct drawables in place, I don't see why it wouldn't work. :hoh

Graechan · **Posted:** Sun Oct 23, 2011 2:08 am **(#13)**

GnuTux wrote:

I double checked your parameter values with the link O posted and they look correct.

Assuming you have the correct drawables in place, I don't see why it wouldn't work. :hoh

And that is what is frustrating me. the drawables are correct, but it returns no change to the Image.

GnuTux · **Posted:** Sun Oct 23, 2011 8:59 am **(#14)**

Do the values for the last two parms look right?

Code: Select all

10         ; Material specular reflectivity (0..1)
0          ; Material highlight (0..->), note: it's exponential

Maybe we should put together a quick little script with user inputs for all the lighting-plug-in parameters, just to experiment so we know what the results will be when the plug-in is called non-interactively. That would allow the testing and tweaking of all the lighting parameters before plugging them into a script.

Graechan · **Posted:** Sun Oct 23, 2011 5:58 pm **(#15)**

I have discovered that I needed to have the image displayed for the plug-in to return a result.

Code: Select all

(gimp-display-new image)
   (plug-in-lighting RUN-NONINTERACTIVE image img-layer img-channel 0 TRUE FALSE 0 1 '(255 255 255) -1 -1 1 1.87 -1.52 1.00 0.50 0.25 0.10 10.00 0 FALSE FALSE FALSE)
   (gimp-displays-flush)

Idon't know why but now I get something back 'Image below' (I stroked by 1 to post)

Now I have to make a second call of the plug-in for light 2(without bump-map I assume).

molly · **Joined:** Apr 07, 2010 **Posts:** 14182

I think you only have to bump map it once and do light one and light two. I don't have the tute up in front of me.

Graechan · **Posted:** Sun Oct 23, 2011 6:28 pm **(#17)**

GnuTux wrote:

Do the values for the last two parms look right?

Code: Select all

10         ; Material specular reflectivity (0..1)
0          ; Material highlight (0..->), note: it's exponential

Maybe we should put together a quick little script with user inputs for all the lighting-plug-in parameters, just to experiment so we know what the results will be when the plug-in is called non-interactively. That would allow the testing and tweaking of all the lighting parameters before plugging them into a script.

That is a fantastic idea and I would love to be involved after I finish this script, It's a very interesting plug-in with no info from Wilbur.

Graechan · **Posted:** Sun Oct 23, 2011 7:33 pm **(#18)**

The following Image is after using this code (stroked for clarity)

Code: Select all

(gimp-display-new image)
   (plug-in-lighting RUN-NONINTERACTIVE image img-layer img-channel 0 TRUE FALSE 0 1 '(255 255 255) -1 -1 1 1.87 -1.52 1.00 0.50 0.25 0.10 10.00 0 FALSE FALSE FALSE)
   (gimp-displays-flush)
   (plug-in-colortoalpha RUN-NONINTERACTIVE image img-layer '(222 222 222))
   (plug-in-lighting RUN-NONINTERACTIVE image img-layer img-channel 0 TRUE FALSE 0 1 '(255 255 255) 2 -1 1 -1.57 1.51 1.00 0.50 0.25 0.10 10.00 0 FALSE FALSE FALSE)
   (plug-in-colortoalpha RUN-NONINTERACTIVE image img-layer '(222 222 222))
   (gimp-displays-flush)

The result looks poor wish I could put both light sources on 1 call.

saulgoode · **Posted:** Sun Oct 23, 2011 8:45 pm **(#19)**

Since it is not mentioned in the documentation, it might be helpful to know the following:

Code: Select all

Dialog Parameter    PDB Argument
"Glowing"           #17 (ambient intensity)
"Intensity"         #18 (diffuse intensity)
"Bright"            #19 (diffuse reflectivity)
"Shiny"             #20 (specular reflectivity)
"Polished"          #21 (material highlight)

Neither the "Distance" nor the "Metallic" option in the Dialog appear to have corresponding PDB arguments. You might be able to get close to the metallic effect by setting the two reflectivities to the same value and adjusting the two intensities.

Also, it appears that the Antialiasing argument (#22) of the PDB call is completely ignored by the plug-in (nor is it available in the Dialog).

Graechan · **Posted:** Sun Oct 23, 2011 9:16 pm **(#20)**

Saulgoode I have learn't that my setting are incorrect, now I'll go for walk out the back then come back and ammend did you discover any info on running plug-in with two light sources :coolthup