lu15w1r7h / carveout

digital pen note taking

Luis Wirth

carveout's Issues

Text boxes

Keyboard is still a good way to type.
A simple font/fontsize/color support for keyboard input would be great!

web support

Carveout should run in the browser.

fix lyon crash

nical/lyon#821

redraw screen lazily

proper error handling

handle errors using eyre and thiserror

for instance in savefile loading and saving

egui paint callback instead of texture

retessellate strokes

strokes that we're rescaled (as seen from the monitor) should be retessellated

multi touch support (touchscreen)

long strokes cause lag

probably because tessellation takes long.
Try to only tessellate new part of stroke, instead of all of it.

extend file format (camera config, tool config, ...)

pdf export

orientation indicators

Introduce some small graphical indicators helpful for orientation in the canvas.

• a small coordinate system with two axis X and Y (rotation reference)
• a small ruler (size reference)
• a minimap (translation reference)?

scale/rotate with center

trackpad multitouch support

reorganize modules

avoid a large canvas module, instead put these things into root. Almost everything is canvas

ui rendering inside of canvas

There must be a way to use egui for rendering inside the canvas.

A interesting reference is egui-gizmo

• crates.io
• web demo
• demo source

fix rendering order between egui and canvas

Currently the canvas renderer is executed after the ui renderer. Therefore any ui in the canvas rect is overdrawn. This is not what we want. egui windows and the canvas overlay should be drawn on top of the canvas!

Using egui::PaintCallback this wouldn't be a problem, as everything would be drawn in order. But this approach hasn't been working out, because callbacks don't really allow for passing references in.

A depth buffer doesn't work for now, because egui (or at least egui-wgpu) always writes the same z coordinate for every vertex.

screenshot feature

see wgpu/capture

better protocol visualizer

• Every node should have an icon (e.g. pen, eraser, ...).
• The visualizer should be smart and show important changes (like first time using a new tool)
• use placeholders for long linear sequences of same tool

egui references

emilk/egui#1942
https://github.com/n00kii/egui-modal

undo system

implement undo system

command pattern
undo-tree

create tree visualizer using egui (like undo-tree packacke)

eraser

implement stroke eraser

use https://github.com/dimforge/parry for collision detection

wacom pen support

support drawing tablet pens like wacom

we need

• smithay-client-toolkit PR: wacom support for wayland
• winit PR: wacom support for wayland

strokes as bsplines

use bsplines and curve-fitting to describe strokes

multisampling

avoid aliasing using msaa

see wgpu/msaa

pdf rendering support

• pdf rendering support (pdf as background)

potential pdf rendering libraries

• pdfium same as chromium
• poppler-rs cairo
• purdy wgpu

use spatial partitioning

useful for anything that needs to do collision detection, like eraser.

rapier's QueryPipeline as reference

canvas partitioning

partition canvas using A4 pages for instance

object selection

you should be able to select objects like strokes and move them around, delete them etc. Try drawing a selection UI using egui.
The SelectLoop should of course use this.

euclidea tools

euclidea

egui docking