LÖVE

Posted: **Wed Aug 29, 2012 6:10 pm**

Hello,

First of all, yesterday was the first day I ever touched to shader programming, so perhaps that what I want is not possible.

I would like to send an array of (say) 25 vec2 from Lua to a pixel effect. Looking at the löve API for send, there does not seem to be such a function, but the OpenGL doc on uniform variables says that uniforms can be of any type, and gives examples of arrays of matrices.

So my question is:
Is it possible to send an array of 25 vec2 from Lua to a shader?

Of course I can fake it and send 25 individual variables, but this is not pretty and has probably some performance issues.

Thank you

Fractal

Posted: **Wed Aug 29, 2012 9:45 pm**

There is a topic with many shader examples: viewtopic.php?f=4&t=3733

If you want to send 25 vectors, you can call send 25 times. Extern in this case is an alias for uniform type.

Code: Select all


effect = love.graphics.newPixelEffect([[
extern vec2 vector1
extern vec2 vector2
extern vec2 vector3
...
vec4 effect( vec4 color, Image texture, vec2 texture_coords, vec2 screen_coords )
{
...
}
]])

effect:send('vector1',num1,num2)
effect:send('vector2',num1,num2)
...

LÖVE

Sending an array of vec2 to a pixel effect

Sending an array of vec2 to a pixel effect

Re: Sending an array of vec2 to a pixel effect