文件列表:

configure (189239, 2023-09-23)
demo/ (0, 2023-09-23)
demo/1-basic.frag (99, 2023-09-23)
demo/2-time.frag (112, 2023-09-23)
demo/3-noisy-gradients.frag (1394, 2023-09-23)
demo/4-diamonds-diagonals.frag (3620, 2023-09-23)
demo/5-blobs.frag (463, 2023-09-23)
demo/6-metaballs.frag (7943, 2023-09-23)
demo/7-cook-torrance.frag (10236, 2023-09-23)
demo/8-happy-jumping.frag (15412, 2023-09-23)
demo/9-mouse.frag (91, 2023-09-23)
img/ (0, 2023-09-23)
img/basic.png (98067, 2023-09-23)
img/demo-1.gif (4681616, 2023-09-23)
img/demo-2.gif (4194181, 2023-09-23)
img/demo-3.gif (3050901, 2023-09-23)
img/demo-4.gif (1551305, 2023-09-23)
img/demo-5.gif (4495346, 2023-09-23)
termgl.c (8406, 2023-09-23)

# termgl A terminal-based renderer for OpenGL shaders. Like [Shadertoy](https://shadertoy.com), but in the terminal. This project uses [GLFW](https://www.glfw.org) to render an invisible OpenGL context, then converts its pixel data to ANSI escape sequences understood by a terminal emulator. Currently, it supports rendering custom fragment shaders to a single quad that fills the entire terminal window. Support for custom vertex shaders (or geometries) is planned. It also supports spinning up a secondary thread via `pthreads` to handle mouse input, allowing shaders that use the `iMouse` uniform to function properly. ## Demos - [Psychedelix](https://www.shadertoy.com/view/MdsXDM):  - [Diamonds and Diagonals](https://www.shadertoy.com/view/DtyXDR):  - [Noisy Gradient](https://andrewlrussell.com):  - [Metaballs](https://www.shadertoy.com/view/ld2GRz):  - [Happy Jumping](https://www.shadertoy.com/view/3lsSzf)  ## Compiling and Running Prior to compiling, ensure that [GLFW](https://www.glfw.org) and [OpenGL](https://opengl.org) have been installed. Then, run: ```sh $ ./configure --with-pthreads $ make $ ./termgl demos/1-basic.frag ``` Assuming a successful compilation, `termgl` should display the following:  To close the application, send a `SIGTERM` with `Ctrl+C`. If on a system without `pthreads` support, run `./configure` without the `--with-pthreads` argument. This will disable mouse support, but still allow shaders to be rendered. ## Running A Custom Shader To run a custom fragment shader, simply pass its filename as the first argument to `termgl`. A minimal shader is as follows: ```glsl void mainImage(out vec4 fragColor, in vec2 fragCoord) { fragColor = vec4(fragCoord, 0.5, 1.0); } ``` ## Running Shaders Directly from Shadertoy `termgl` exposes a minimal wrapper that emulates Shadertoy's uniforms and attributes. For *most* (but not all) shaders, pasting the contents into a file and opening them with `termgl` should work properly. In particular, `termgl` exposes: ```glsl uniform vec2 iResolution; uniform vec3 iMouse; uniform float iTime; ``` None of these need to be included in the shader code, `termgl`'s wrapper adds these lines automatically (just as Shadertoy does). Others (such as `iDate`) are not yet supported. ## Notes - `termgl` should work on any platform supported by GLFW including Linux, MacOS, and Windows. However, Windows is untested at this time. - Running `termgl` within a terminal multiplexer such as [`tmux`](https://github.com/tmux/tmux) is not recommended for performance reasons. For best performance, run `termgl` natively inside a GPU-accelerated terminal such as [kitty](https://sw.kovidgoyal.net/kitty) or [alacritty](https://github.com/alacritty/alacritty). - The GLSL version is system-dependent, but all shaders in `demo/` are confirmed to be working with GLSL 1.10 (i.e. `#version 110`). ## To-Do - Add the ability to select a different geometry on which to render the shader (e.g. cube, sphere, etc.) - Investigate occasional crashes on window resize - Add more uniforms and other quality of life improvements - Add support for channels (i.e. custom images/textures) ## A Few of My Other Terminal Projects - [tuibox](https://github.com/Cubified/tuibox): A single-header terminal UI library - [vex](https://github.com/Cubified/vex): A terminal-based hex editor with vi-like keybinds - [colorslide](https://github.com/Cubified/colorslide): A terminal-based color picker with mouse support

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