3 releases
0.1.2 | Dec 28, 2021 |
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0.1.1 | Dec 28, 2021 |
0.1.0 | Dec 28, 2021 |
#269 in Rendering
18KB
250 lines
Shadercrab
A simple single buffer shadertoy emulator
Installation:
With cargo (rust's package manager):
cargo install shadercrab
From source (Also needs cargo):
Clone this repo, and run cargo build --release
to compile the program
Usage:
If installed with cargo and it's in path:
shadercrab "path/to/shader"
From source:
cargo run --release -- "path/to/shader"
Shadercrab takes in a single file path as an argument. This shader is then compiled and displayed to the output window. When the R key is pressed or when the file is modified, the shader is reloaded.
The shader is according to how shadertoy handles the "main" tab, which means it needs this function:
mainImage(out vec4 fragColor, in vec2 fragCoord)
where
fragColor
is the output color for the pixel, in sRGB spacefragCoord
is the pixel coordinate, (0, 0) at the bottom left,(window_width, window_height)
at the top right
The following constants are also defined:
float iTime
is the time elapsed since the shader was (re)loaded, in secondsint iFrame
is the number of frames that have been renderedvec3 iResolution
where xy is the resolution of the window, and z is the aspect ration (y / x)vec4 iMouse
where xy are the mouse cursor position, in pixel coords and zw the state of whether the mouse buttons are held down. The mouse position can be changed by dragging the mouse
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.
Dependencies
~7–15MB
~207K SLoC