pilka 🔩

Pilka is a cross-platform live-coding tool for creating shader* demos, similar to Bonzomatic, KodeLife or sh4der-jockey.

Available features:

• Hot-reload
• Saving shaders
• Taking screenshots
• Recording videos
• Compute pipeline for post processing

How

In current state pilka tries to seek shaders folder with the files shader.vert and shader.frag, on fail pilka will generate default setup for you. Then open shader in your favourite code editor (VS, emacs, vim, ed etc.) and pilka would fetch changes after each save.

Controls

• F1: Print help
• F2: Toggle play/pause
• F3: Pause and step back one frame
• F4: Pause and step forward one frame
• F5: Restart playback at frame 0 (Time and Pos = 0)
• F6: Print parameters
• F10: Save shaders
• F11: Take Screenshot
• F12: Start/Stop record video
• ESC: Exit the application
• Arrows: Change Pos

Parameters

(per-draw-update)

name	type	range
position	vec3	(-∞, ∞)
time	float	[0, ∞)
resolution	vec2	[0, a]
mouse	vec2	[-1, 1]
mouse_pressed	bool
frame	uint
time_delta	float
record_period	float
prev_frame	texture

Flags

• --record f32 - Specify duration of recorded video
• --size u32xu32 - Specify window size and lock from resizing

Requirements

Vulkan SDK is required.

On recent macOS, to allow sound input to be captured (for FFT textures to be generated), you need to: Open up System Preferences, click on Security & Privacy, click on the Privacy tab then click on the Microphone menu item. Make sure pilka is in the list and ticked... erm, probably. I don't have macOS.

Installation

cargo install pilka

You also can install the application by to downloading the source code and build locally.

# or through ssh git@github.com:pudnax/pilka.git
git clone https://github.com/pudnax/pilka.git
cd pilka
cargo install --path .

Dependencies

winit is the "default" window library in Rust ecosystem. And it covers the most of cross-platform issues for you.

png is used to encode screenshots into png files.

notify is a file watcher and maintains the hot-reload.

ash is a Vulkan bindings. I choose ash because I see pilka as a learning project and want to touch the maximum untouched Vulkan. For the same reason I didn't use vulkano, erupt, vulkanism, vkvk.

Ffmpeg is used to record videos. For my concerns it's temporary solution after which I switch to rav1e on it's release.

Places of inspiration (from where I steal code):

• piet-gpu
• https://github.com/w23/OpenSource