webgl-noise
3DWorld
webgl-noise | 3DWorld | |
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5 | 54 | |
2,699 | 1,072 | |
0.9% | - | |
0.0 | 9.9 | |
5 months ago | 3 days ago | |
C | C++ | |
MIT License | GNU General Public License v3.0 only |
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webgl-noise
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How do you make textures for games WITHOUT drawing them?
you may want to start with (4d cellular) ashima-simplex-noise functions of https://github.com/ashima/webgl-noise as basis function, as this is not convergent+iterative like other procgen functions (that are more like a convergent game-of-life). demos of them are in https://www.shadertoy.com/results?query=ashima&sort=newest&filter=
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Best noise algo for height-mapping continents on a sphere?
Oh nice. I think the GLM noise is actually based off the Ashima Arts + Stefan Gustavson GLSL noise https://github.com/ashima/webgl-noise
- Simplex noise(or any fast smooth noise functions) in godot shaders?
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Added 3D Noise and Blend Modes to my GLSL Noise library (gl-Noise)! Used it to make a Planet Generator. Demo and GitHub in comments!
Oh I see what you mean now. Not saying https://github.com/KdotJPG/OpenSimplex2 isn't safe, just that https://github.com/ashima/webgl-noise/blob/master/src/noise3D.glsl isn't. Ty for clarifying, makes perfect sense now!
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Biome generation using 7 noise maps. Some generation patterns don't quite make proper sense, but I'm happy with it!
Several years ago when I was experimenting with all of this I found that OpenSimplex was significantly slower than regular Simplex (not sure what library I was using). Maybe it's improved since then? Anyway, I've since moved my noise computation to the GPU and speed is less of an issue for that particular project. I'm currently using the simplex noise function from GLM, which comes from https://github.com/ashima/webgl-noise. Do you have any idea how that compares with the various noise functions you've listed?
3DWorld
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Generating Master of Orion 2 like starmap
You mean you want to draw the individual stars themselves? It's likely just a texture, probably white so that it can be colored differently for each star. This is how I've done it. Try a Google image search for "flare texture". You can find some of the ones I used here (flare*.jpg): https://github.com/fegennari/3DWorld/tree/master/textures
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Map Generation by Diamond Square with Shading and Raycasted Shadows.
I remember it being called "wave surfing", where you start at the current pixel and draw a line to the light source, checking the elevation vs. the altitude value of the line (Y or Z) at every step. I have the code in my mesh_shadow_gen class here: https://github.com/fegennari/3DWorld/blob/master/src/visibility.cpp
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How to manage a buffer containing objects of varying size? For sparse chunk loading/unloading
This all sounds complex, but the system can be made to work well. I've written something similar myself, except with VBOs rather than SSBOs. My code can be found in these two files: https://github.com/fegennari/3DWorld/blob/master/src/buildings.h
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Procedurally Generated Spider Model and Animation
C++ code for drawing spiders can be found in my GitHub project, in the spider_draw_t class: https://github.com/fegennari/3DWorld/blob/master/src/building_animal_draw.cpp
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Procedurally generated 8km Octree Terrain using Compute Shaders and WGPU (Rust)
Filling the cracks properly generally gives better performance and fewer drawing artifacts compared to skirts. If you use indexed triangles and set them up in neat rows and columns, it's pretty easy to get right. No lookup tables or big switch cases, and it works with any number of LODs. See the crack_ibuf_t code starting around like 1800 here: https://github.com/fegennari/3DWorld/blob/master/src/tiled_mesh.cpp
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Pixel planets with Pygame and OpenSimplex
I wrote a planet name generator that combines multi-character combinations. It may not do as good as a proper Markov Chain, but may produce names that sound better than your simple approach. If you're interested, the code can be found here: https://github.com/fegennari/3DWorld/blob/master/src/Universe_name.cpp
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Reusing vertices while using marching cubes/tetrahedra
The code for this is in my voxel_manager::add_triangles_for_voxel() on line 497 here: https://github.com/fegennari/3DWorld/blob/master/src/voxels.cpp
- Memory Management for infinite procedural generation algorithm (please help me I beg)
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Best approach to render a lot of text.
Thanks. Yes, I was looking at this. The problem is that the texture atlases are in a different format than the ones I currently use. The MSDF versions don't have all of the ASCII characters and some characters have a different number of pixels. So it's not a drop in replacement for my system, which is using texture atlases like this: https://github.com/fegennari/3DWorld/blob/master/textures/atlas/text_atlas.png
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Rigid Body Physics with rotation question
I have some code for this here, but it's part of a large project and not easy to read/understand: https://github.com/fegennari/3DWorld/blob/master/src/free_obj.cpp
What are some alternatives?
FastNoise - Fast Portable Noise Library - C# C++ C Java HLSL GLSL JavaScript Rust Go
tinygltf - Header only C++11 tiny glTF 2.0 library
OpenSimplex2 - Successors to OpenSimplex Noise, plus updated OpenSimplex.
glNoise - A collection of GLSL noise functions for use with WebGL with an easy to use API.
single_file_libs - List of single-file C/C++ libraries.
Noise-Extras - Noise & procedural generation code pieces that I didn't feel needed whole repos all to themselves.
MarkovNameGenerator - :black_nib: Markov process-based procedural name and word generator demo
fr_public - Farbrausch demo tools 2001-2011
PolyWorld - A world generator that is based on Voronoi diagrams
Cities - Procedural city & road placement
tinyobjloader - Tiny but powerful single file wavefront obj loader