willguimont/rolly-dango

Play it here: https://willguimont.github.io/rolly-dango/

Rolly Dango

Rolly Dango, an isometric rolling puzzle made with WASM-4 by @samX500 and @willGuimont.

Try the game here or on itch.io!

Here's some key points of our project:

• We made our own ECS (entity-component-systems) from scratch
• To save cartridge space, we built our own Huffman coding algorithm
• To help ourselves make levels, we built our own level editor using p5.js
• Made all of our sprites using Aseprite

Our level editor:

Dependencies

You'll need a nightly version of Nim because we need the -d:nimNoQuit from this pull request. To do so, install the latest nightly with:

choosenim devel --latest

Optionally, you can install binaryen to optimize further the binary size.

Build cartridge

# Debug mode
nimble dbg
# Release mode
nimble rel

Run the tests

nimble test

Deploy to GitHub-Pages

./deploy.sh

Running the cartridge

# Run compiled cartridge in your web browser
w4 run build/cart.wasm
# Run with hot reloading
w4 watch
# Run natively
w4 run-native build/cart.wasm

Useful tools

png2src

w4 png2src --nim top.png down.png left.png right.png

bundle

w4 bundle --html build/html/index.html --title Dango --description "Rolling puzzle game" --icon-file "assets/sprites/dangoBeeg.png" build/cart.wasm
w4 bundle --linux dango carts/cart.wasm

rolly-dango's Issues

Modify input system to send message rather than acting upon components directly

The current input system acts upon components directly, we need to modify it so that it sends message to the physics system instead.

Sounds

Create constructor for PhysicComponent to avoid having to create EventQueue manual

Idle Animations

Be able to change levels

Requires #32
Use the state machine to make levels that load one after the other
X button to reset level

End tile not working

Moveable tile

Moveable tile can be pushed by the player.
You can push one tile via regular input.
If you roll into a tile, you can push as many tile as your velocity.

Reset if fall down

Changing velocity so that you can move up on more block than you fall down.

If you slide down a slope and then go up a slope of the same height, you cannot get to the top of the slope.

Add GitHub Actions on merge to main

Sort sprite before drawing so that a dango behind a tile is hidden

Level 5 pusher issue

Title screen

Requires #32 to handle game state.

Implement ICE

Mirror act upon themselves

Explore velocity preservation and redirection

Exploring concept for velocity preservation and velocity redirection

Fixing Sprite object to not take hardcoded lenght array

Right now, a sprite has for argument a ptr to an array of 64 elements, it cannot use any other size.

Level06 going down slopes doesn't give back speed

Better title screen

Rolling animation

Move `Sprite` outside of `assets`

Move the type definition and the macro into a new module

Implement a state machine

Can be inspired from willGuimont/state_machine

Add mirror, punch block and ice to editor

Adding new tiles to the editor. Punch block and mirror need to have 4 different direction.

Walk trough mirrors

Implement movement on flat tiles

The dango should be able to move around on the xy plane

Color palette

Make levels

Mirors not working

Fix the space problem

• compress levels
• 1bpp sprites

Velocity display

Since the velocity of the dango is the core of the game. It should be displayed to make it obvious to the player how it works.

Add imports and level generation macro call to level export

End screen

decompress level at runtime

Better end screen

Mirror that redirect speed

Implement slope physics

The dango should be able to move down slopes and gain momentum.
The dango should be able to move up slopes if and only if it has enough momentum.

Deciding on the comportement of push block when two hit you at the same time.

We need to decide on how push block behave when to hit you at the same place, which is a scenario that can happen.

Ending tile change level

Punching blocks

Send impulse message to physical
Gives a suddent bust of velocity

Find a way to disable physics on some chosen tile to improve performance.

Create enum for messaging system

We need to create an enum to be able to send message between systems using our messaging system.

Code in the slopes

requires #5
Add the slopes as new entities

Prevent item from going of off the edge

Right now entity can move outside the bound of the level. It shouldn't be possible.

Create entities from the generated world map from the editor

Should take the generated code from the level editor and create entities at correct positions

Add starting and ending tile

Levels should contain a starting and ending tiles describing the starting position of the dango

Create slope sprites

Create slope sprite

Making a collision detection system

We need to make a collision detection system to gather information around our environment and act accordingly