Colormapping and render-to-texture · nannou-org/nannou#718

(0 comments) (1 reaction) (0 assignees)Rust (4,662 stars) (254 forks)batch import

graphicshelp wanted

説明

I've been working on a program that iteratively creates an image that is monochrome. I do so by drawing to an initially fully black frame using white color and low alpha values and not clear the image between frames.

This works pretty well so far, but I'd like to go one step further and have a colormapping to make the output a bit more interesting. Essentially, there would be a function

fn colormap(in: Color) -> Color;

between the image that I draw to and what is actually shown on screen. However, I am currently lost how I would do this in Nannou. I'd have to draw to some kind of texture or off-screen surface for my actual grayscale data and then pixel-by-pixel map to the actual output colors.

I'm pretty new to Nannou so I hope the question isn't too naive. But is it possible to do what I want to achieve?

コントリビューターガイド

技術スタック: rust
領域: api
Issue 種別: feature
難度: 4
推定時間: over 1 week
活動状況: stale
明確さ: needs investigation
前提条件: Rust programmingNannou framework basicsUnderstanding of textures and shaders
初心者向け度: 15
調査方針: First, explore the Nannou documentation and source code for any existing render to texture functionality, particularly in the `Draw` and `Texture` modules. Look at examples like `texture.rs` in the examples folder. Consider implementing a colormapping function using a custom shader that samples from a render texture and applies a color map. Investigate the `wgpu` backend used by Nannou for low level GPU programming. Check the issue comments for any updates or maintainer responses, though currently none exist.