bryanteoh

I'm trying to get some of my 3d geometry wiggling on the gpu instead of going through the expensive process of exporting a matrix then converting back to opengl.

When I open the vd.gnoise.3d.jxs shader, the first parameter "pg" is a vec4, but the default value is a fairly huge list of numbers. First of all, what's going on there, and second, am I able to randomize the matrix of points distorting the shape?

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I'm trying to get some of my 3d geometry wiggling on the gpu instead of going through the expensive process of exporting a matrix then converting back to opengl.  

When I open the vd.gnoise.3d.jxs shader, the first parameter "pg" is a vec4, but the default value is a fairly huge list of numbers.  First of all, what's going on there, and second, am I able to randomize the matrix of points distorting the shape? 

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vd-gnoise-3d-jxs-help

On Wed, Sep 24, 2008 at 2:08 PM, bryanteoh wrote:

> I'm trying to get some of my 3d geometry wiggling on the gpu instead of going through the expensive process of exporting a matrix then converting back to opengl.

> When I open the vd.gnoise.3d.jxs shader, the first parameter "pg" is a vec4, but the default value is a fairly huge list of numbers.

It's not just a vec4, but an array of vec4s. If you look at the

parameter's declaration in the shader code, it's pg[66].

On Wed, Sep 24, 2008 at 2:08 PM, bryanteoh  wrote:
>
> I'm trying to get some of my 3d geometry wiggling on the gpu instead of going through the expensive process of exporting a matrix then converting back to opengl.
>
> When I open the vd.gnoise.3d.jxs shader, the first parameter "pg" is a vec4, but the default value is a fairly huge list of numbers.

It's not just a vec4, but an array of vec4s.  If you look at the
parameter's declaration in the shader code, it's pg[66].

so in order to make the shape wiggle in another way I'd need to generate another array of vec4's consisting of 66 numbers? How can I pass this to the shader as a parameter?

so in order to make the shape wiggle in another way I'd need to generate another array of vec4's consisting of 66 numbers?  How can I pass this to the shader as a parameter? 

Eureka! Generating a list of 264 values in the proper format for this shader is a bit of a pain but I think I finally worked something out. The jit.expr object could probably be used to eliminate half of the objects, but that's another battle for another day.

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Eureka!  Generating a list of 264 values in the proper format for this shader is a bit of a pain but I think I finally worked something out.  The jit.expr object could probably be used to eliminate half of the objects, but that's another battle for another day.  

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vd.gnoise.3d.jxs help?