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dmlary /
Last active February 5, 2024 22:10
bevy v0.13 stepping egui interface
// plugin for demonstrating bevy v0.13 system stepping using egui interface
// Released under the MIT License
use std::collections::HashMap;
use bevy::{
ecs::schedule::{InternedScheduleLabel, NodeId, ScheduleLabel, Stepping},
dmlary /
Created January 18, 2024 00:38
python script using pyfshfs to dump a hfs disk image that macos could not mount
# used this on an ubuntu docker image with `apt install python3-libfshfs`
import pyfshfs
import os
def export_file(entry, dest):
print(f'export {dest}')
dir = os.path.dirname(dest)
if not os.path.exists(dir):
dmlary /
Created December 29, 2023 01:58
bevy 0.12 system for spawning a `GltfNode` from `Handle<GltfNode>`
fn gltf_node_spawner(
mut commands: Commands,
node_handles: Query<(Entity, &Handle<GltfNode>), Added<Handle<GltfNode>>>,
assets_gltf_nodes: Res<Assets<GltfNode>>,
assets_gltf_mesh: Res<Assets<GltfMesh>>,
) {
for (parent, handle) in &node_handles {
let Some(node) = assets_gltf_nodes.get(handle) else {
warn!("GltfNode not found: entity {:?}, {:?}", parent, handle);
dmlary /
Created December 24, 2023 16:57
bevy v0.12 demo of rendering a single entity at multiple locations
/// bevy v0.12 demo of rendering a single entity at multiple locations
/// Motivation:
/// I have a use-case in my game where I have a single entity (with various
/// components) that must be visible at two places on the screen at the same
/// time (non-euclidean grid shenanigans). I didn't want to duplicate a
/// subset of the entity's components then manage the duplicate's lifetime.
/// Through conversations in the bevy discord, the idea came up of making
/// modifications to the render pipeline to achive this.
dmlary /
Last active August 18, 2023 23:42
Bevy v0.10 SystemParam-based egui Widgets
/// implemention of SystemParam-based egui Widgets for bevy 0.10
/// adapted from:
/// Effectively widgets can access world components/resources similar
/// to systems.
use bevy::ecs::system::{SystemParam, SystemState};
use bevy::prelude::*;
use bevy_egui::egui;
dmlary /
Last active June 23, 2024 07:51
minimal example of adding a custom render pipeline in bevy 0.11
/// minimal example of adding a custom render pipeline in bevy 0.11.
/// When this example runs, you should only see a blue screen. There are no
/// vertex buffers, or anything else in this example. Effectively it is
/// shader-toy written in bevy.
/// This revision adds a post-processing node to the RenderGraph to
/// execute the shader. Thanks to @Jasmine on the bevy discord for
/// suggesting I take a second look at the bevy post-processing example
dmlary /
Created July 21, 2023 00:16
bevy 0.10.1 stun race-condition resolution
//! Example workaround for ecs-based race-conditions when used in muds.
//! The key problem is two characters stunning each other in the same
//! frame, only one of them should end up stunned.
//! This solution in bevy uses an exclusive system that runs without
//! world deferment.
use anyhow::{bail, Result};
use bevy::{log::LogPlugin, prelude::*};
dmlary / cscope.lua
Last active July 13, 2023 16:25
neovim cscope telescope integration
Navigate cscope in neovim using telescope with multiple databases
local cscope = require('cscope')
-- look for cscope.out in the current working directory
cscope.add_database { path = "." }
-- add a second database and set the top-level path for files in that db
cscope.add_database {
path = "/project/altitude/src",
dmlary /
Created May 29, 2023 01:28
Bevy egui 3d tile palette demo
use bevy::{
core_pipeline::tonemapping::Tonemapping, prelude::*, render::view::RenderLayers,
use bevy_dolly::prelude::*;
use bevy_egui::{egui, EguiContexts, EguiPlugin, EguiUserTextures};
use bevy_inspector_egui::quick::WorldInspectorPlugin;
dmlary /
Last active June 3, 2024 07:46
Bevy v0.10 draw Axis-Aligned Bounding-Boxes (AABB) around Scenes after they've been loaded
//! Load a GLB Scene, and draw an Axis-Aligned Bounding-Box around the entire
//! scene
//! Works in Bevy v0.10
use bevy::{
core_pipeline::tonemapping::Tonemapping, prelude::*, render::primitives::Aabb,
scene::SceneInstance, transform::TransformSystem::TransformPropagate,