Creating a GLSL Arrays of Uniforms?

arrays opengl glsl shader
Miles picture Miles · Nov 11, 2011 · Viewed 61.3k times · Source

I would like to leave OpenGL's lights and make my own. I would like my shaders to allow for a variable number of lights.

Can we declare an array of uniforms in GLSL shaders? If so, how would we set the values of those uniforms?

Answer

datenwolf picture datenwolf · Nov 11, 2011

Yes this is possible. You declare uniform arrays similar to how you'd do it in C, e.g.

uniform float v[10];

Then you can set their values using glUniform{1,2,3,4}{f,i}v

GLfloat v[10] = {...};
glUniform1fv(glGetUniformLocation(program, "v"), 10, v);

Related questions

GLSL indexing into uniform array with variable length

I am passing an uniform array to geometry shader and want to index into it using a variable. I can use variable length array & index with fixed number (numeric constant) OR I can define a fixed length array & …

Read More
When should I use indexed arrays of OpenGL vertices?

I'm trying to get a clear idea of when I should be using indexed arrays of OpenGL vertices, drawn with gl[Multi]DrawElements and the like, versus when I should simply use contiguous arrays of vertices, drawn with gl[Multi]…

Read More
How can I remove a specific item from an array?

I have an array of numbers and I'm using the .push() method to add elements to it. Is there a simple way to remove a specific element from an array? I'm looking for the equivalent of something like: array.remove(…

Read More