vade

perhaps Ive grossly missed something (very possible), but the only 

lighting control ive seen is with the jit.gl.render lighting 

attributes, which seems to only apply to the 'world light'.

how does one create other lights, beside explicitly sending openGL 

small feature request (?) - perhaps a jit.gl.light with some options 

for spotlights (radius, direction, intensity, spread, etc?) Ive just 

gotten into getting heavy with lighting on jit.gl.render, and man it 

adds so much flavor to a scene when lighting is dynamic. it would be 

great to have a jitter object to mix it up some more.

Also, small note re lighting in general, in the tutorial patch, 

mat_ambient, mat_diffuse and mat_specular to the jit.gl.gridshape and 

light_ambient, light_diffuse and light_specular to jit.gl.render are 

all being sent as a list of 3 floats, (RGB), however when control- 

option clicking jit.gl.gridshape & jit.gl.render, it lists their 

input as float array[4]. Ive tried playing with the alpha component 

to these messages in my own patches, but it only seems to effect 

mat_specular, but that could be my imagination.

I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I 

You will not be saved by the Holy Ghost. You will not be saved by the 

perhaps Ive grossly missed something (very possible),  but the only  
lighting control ive seen is with the jit.gl.render lighting  
attributes, which seems to only apply to the 'world light'.

how does one create other lights, beside explicitly sending openGL  
commands to jit.gl.sketch?

small feature request (?) - perhaps a jit.gl.light with some options  
for spotlights (radius, direction, intensity, spread, etc?) Ive just  
gotten into getting heavy with lighting on jit.gl.render, and man it  
adds so much flavor to a scene when lighting is dynamic. it would be  
great to have a jitter object to mix it up some more.

Also, small note re lighting in general, in the tutorial patch,  
mat_ambient, mat_diffuse and mat_specular to the jit.gl.gridshape and  
light_ambient, light_diffuse and light_specular to jit.gl.render  are  
all being sent as a list of 3 floats, (RGB), however when control- 
option clicking jit.gl.gridshape & jit.gl.render, it lists their  
input as float array[4]. Ive tried playing with the alpha component  
to these messages in my own patches, but it only seems to effect  
mat_specular, but that could be my imagination.

I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I LIVE! I  
LIVE! I LIVE! I LIVE! I LIVE!

You will not be saved by the Holy Ghost. You will not be saved by the  
God Plutonium.

opengl-lighting-questions

Apologies, I forgot to mentioned that the tutorial patch I am 

Apologies, I forgot to mentioned that the tutorial patch I am  
referring to is 35jLightingAndFog.pat

I'm working on a project where I've modeled a (.obj) vintage 50's TV 

screen. The model is working perfectly for creating a custom glass 

warp distortion and mask, but the next level is to manipulate the 

lighting to achieve reflection/glare/shading - no luck so far.

I'm working on a project where I've modeled a (.obj) vintage 50's TV  
screen.  The model is working perfectly for creating a custom glass  
warp distortion and mask, but the next level is to manipulate the  
lighting to achieve reflection/glare/shading - no luck so far.

I'm pretty sure you could write a shader to calculate "virtual light

sources" to get the effect you're looking for. The gooch shader had

some nice specular highlights. May be a place to start.

I'm pretty sure you could write a shader to calculate "virtual light
sources" to get the effect you're looking for.  The gooch shader had
some nice specular highlights.  May be a place to start.

what would one bind the shader to, if you want to to effect the whole 

comments re jit.gl.light request, or adding other lights sans writing 

what would one bind the shader to, if you want to to effect the whole  
scene?

comments re jit.gl.light request, or adding other lights sans writing  
custom shaders?

>> perhaps Ive grossly missed something (very possible), but the 

>> only lighting control ive seen is with the jit.gl.render lighting 

>> attributes, which seems to only apply to the 'world light'.

>> how does one create other lights, beside explicitly sending openGL 

Currently, for additional lights you would need to use jit.gl.sketch 

and the corresponding GL commands. Originally we had planned a 

jit.gl.light object for Jitter 1.5, but it did not make it into the 

release. Perhaps one will make it into JItter 1.5.3 or 1.5.4.

However, in theory one could make a jit.gl.sketch object which sets 

up the lighting and leaves it on, thus making something like a 

jit.gl.light implementation as a subpatcher. Can try to find time to 

make such an example if people aren't able to figure it out.

>>
>> perhaps Ive grossly missed something (very possible),  but the  
>> only lighting control ive seen is with the jit.gl.render lighting  
>> attributes, which seems to only apply to the 'world light'.
>>
>> how does one create other lights, beside explicitly sending openGL  
>> commands to jit.gl.sketch?
>

Currently, for additional lights you would need to use jit.gl.sketch  
and the corresponding GL commands. Originally we had planned a  
jit.gl.light object for Jitter 1.5, but it did not make it into the  
release. Perhaps one will make it into JItter 1.5.3 or 1.5.4.

However, in theory one could make a jit.gl.sketch object which sets  
up the lighting and leaves it on, thus making something like a  
jit.gl.light implementation as a subpatcher. Can try to find time to  
make such an example if people aren't able to figure it out.

> what would one bind the shader to, if you want to to effect the 

Every object. Note a shader can be bound to more than one object.

> what would one bind the shader to, if you want to to effect the  
> whole scene?

If I could be so bold as to make an official "request" for a 

jit.gl.light object, that would rock, however a jit.gl.sketch 

subpatcher can easily enough be created. Ill be happy to share it 

with the list once I make it (and its not embarrassing :)

If I could be so bold as to make an official "request" for a  
jit.gl.light object, that would rock, however a jit.gl.sketch  
subpatcher can easily enough be created. Ill be happy to share it  
with the list once I make it (and its not embarrassing :)

That is excellent - how do the lights created in jit.gl.sketch work in 

relation to the other jit.gl.* objects? Once you create a light in 

sketch, does it affect everything being rendered?

That is excellent - how do the lights created in jit.gl.sketch work in 
relation to the other jit.gl.* objects? Once you create a light in 
sketch, does it affect everything being rendered?


If it is light #1 or higher it should (unless you've enabled the 

protective OpenGL attribute stack push/pop sequence with ";jitter 

glattribpush 1". this is disabled by default)

If it is light #1 or higher it should (unless you've enabled the  
protective OpenGL attribute stack push/pop sequence with ";jitter  
glattribpush 1". this is disabled by default)

OpenGL Lighting questions.