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Summary of ChangesHello @rektdeckard, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request introduces a new application that renders dynamic and colorful Perlin noise patterns. It provides users with options to adjust the visual characteristics of the noise, offering a customizable animated background or visual effect. The implementation leverages a Simplex Noise algorithm to create these complex, mathematical visuals. Highlights
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Code Review
This pull request introduces a new Perlin noise generator app. The implementation of the Perlin noise algorithm is present, but there are several areas for improvement. I've identified a critical bug in color generation that will cause the app to render incorrectly. Additionally, the app lacks input validation which can lead to crashes, and it doesn't support 2x rendering despite being advertised in the pull request description. I've also included suggestions to align with the repository's style guide and improve code maintainability, such as refactoring large data structures and simplifying the rendering logic. Please review the detailed comments for specific suggestions.
| h = (val & 0xF0) >> 4 | ||
| l = val & 0x0F | ||
| # print([h, l]) | ||
| return c + b[h] + b[l] |
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The color string concatenation is incorrect. The color value from the configuration is a full hex string (e.g., #RRGGBB). Appending two more hex characters results in an invalid color string that will prevent the app from rendering correctly. To modulate a component of the color (e.g., the blue part), you should slice the original string.
return c[:5] + b[h] + b[l]
| def main(config): | ||
| color = config.str("color"); | ||
| if not color: | ||
| color = HUE | ||
| scale = config.str("scale"); | ||
| if not scale: | ||
| scale = SCALE | ||
| scale = int(scale) | ||
|
|
||
| return render.Root( | ||
| child = render.Animation( | ||
| children = flatten([[render.Column([ | ||
| render.Row([ | ||
| render.Box(color = color_for_pixel(x, y, t, color, scale), width = 1, height = 1) for x in range(64)]) for y in range(32)])] * FRAMES_PER_VIEW for t in range(FRAMES)]) | ||
| ) | ||
| ) |
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The main function has several areas for improvement regarding robustness, style, and features:
- 2x Support: The app lacks 2x support, using hardcoded 64x32 dimensions. The style guide encourages 2x support, and it seems intended based on your PR description. This can be added by using
render.get_render_dimensions(). - Input Validation: The
scaleconfiguration is not validated. A non-numeric input will crash the app. This should be handled with atry/exceptblock. - Code Simplification: The
childrenlist forrender.Animationis generated using a complexflattenhelper. This can be simplified to a direct list comprehension, making theflattenfunction andFRAMES_PER_VIEWconstant unnecessary. - Style: Lines 204 and 207 contain unnecessary semicolons.
Here is a revised main function that addresses these points. You will also need to add canvas to your load statement at the top of the file: load("render.star", "render", "canvas").
def main(config):
color = config.get("color") or HUE
scale = SCALE
scale_str = config.get("scale")
if scale_str:
try:
scale = int(scale_str)
except ValueError:
pass # Fallback to default scale
dims = render.get_render_dimensions()
return render.Root(
child = render.Animation(
children = [render.Column([
render.Row([
render.Box(color = color_for_pixel(x, y, t, color, scale), width = 1, height = 1) for x in range(dims.width)]) for y in range(dims.height)]) for t in range(FRAMES)]
)
)
References
- We encourage app developers to add 2x support for their apps. Please refer to the Pixlet documentation on 2x apps for detailed guidelines. A file with a
main()function that doesn't import the "canvas" object from "render.star" is likely an app without 2x support. (link)
| summary: Perlin noise for your Tronbyt | ||
| desc: Set the vibe with beautiful, complex, colorful animated noise produced with math! | ||
| author: rektdeckard | ||
| fileName: perlin_noise.star |
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The fileName does not match the app's directory name. This violates the repository's file naming conventions.
fileName: perlinnoise.starReferences
- The Starlark file containing the
main()function should have the same base name as its containing directory. (link)
| ], | ||
| ) | ||
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| PERMUTATION = [151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225,140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23, 190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83, 111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143, 54, 65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64, 52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9, 129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, 81, 51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157, 184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180] |
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To improve readability and maintainability, large constant data structures like PERMUTATION (and GRAD_3) should be moved to a separate file (e.g., perlin_data.star) and loaded using a load() statement. This follows general best practices for this repository.
References
- To improve readability and maintainability, move large data structures into a separate file and load them into the main application logic.
1 participant
Adds a new app that renders colorful, customizable Perlin noise.