Processing Open-GL
PrOGL is an object oriented OpenGL rendering interface that provides utilities for
- compiling shaders
- managing uniform binding and updating
- drawing multiple shaders to the screen at once
full documentation can be found here
clone and run as a sketch with Processing.
running a fragment shader that requires no custom uniforms. time, resolution, and mouse are default uniforms.
Renderer r;
void setup() {
size(100, 100, P2D);
r = new Renderer("frag.glsl", width, height);
}
void draw() {
r.render();
}declare additional uniforms as follows
static uniforms are unchanging external data values that must be accessed by the shader script.
Uniform tex = new Uniform(
"tex", // uniform variable name
new Texture("texture.jpg"), // data value
uniform_type.TEXTURE // data type
);
// pass the additional uniform with an overloaded constructor
r = new Renderer("frag.glsl", width, height, tex);dynamic uniforms are data values that must be updated every frame to a new value.
Function<Int, Int> incriment_function = t -> t++;
Uniform u = new Uniform(
"inc", // uniform name (incriment variable)
0, // starting value
uniform_type.INT, // data type
incriment_function // self updating function
);
// constructor also takes array lists of uniforms
Uniform[] u_array = new Uniform[]{ tex, u };
ArrayList<Uniform> us = new ArrayList<Uniform>(Arrays.asList(u_array));
r = new Renderer("frag.glsl", width, height, us);