Add the ability to generate noise textures

Increasing access

This would make it easier and more efficient to utilize textures, especially with shaders for WebGL since generating noise with the noise() function or just using the noise() function is often too computationally expensive for many tasks, even when limited to just the CPU.

Most appropriate sub-area of p5.js?

• Accessibility
• Color
• Core/Environment/Rendering
• Data
• DOM
• Events
• Image
• IO
• Math
• Typography
• Utilities
• WebGL
• Build process
• Unit testing
• Internationalization
• Friendly errors
• Other (specify if possible)

Feature request details

We could create a function corresponding to the noise() function called noiseTexture() that takes in similar parameters to noise(). When WebGL is inaccessible we can generate a texture and write to it from the CPU side, and when WebGL is accessible we can generate a texture attached to an FBO and then use a shader with certain uniform parameters to render to it.

Start by reviewing the existing noise() implementation and the WebGL texture, FBO, and shader paths mentioned in the proposal. Define how noiseTexture() should behave in both CPU and WebGL modes, including its parameters and output, then establish tests or examples that verify the generated texture.