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Tagged as: Doodle

Project: Doodle v0.3.0
September 19, 2020 (updated September 19, 2020) by Noah

Here's another alpha release of the game I've been working on, codenamed Project: Doodle. This time, it has new sprites for the player character.

A direction for the Player Character's look.

The new player character is larger in size (33x54 pixels) than the previous 32x32 placeholder was, so the three example levels that came with v0.2.0 no longer worked: the character would get stuck in the narrow hallways. However, this release comes with two new example levels that look better than the older ones anyway.

I may scale up the size of Doors and things to accommodate the larger character as doorways now feel a little tight to draw.

Read more...

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Project: Doodle v0.2.0
June 7, 2020 by Noah

Here is another alpha release of the videogame I've been working on, codenamed Project: Doodle.

It's a drawing-based maze game where you can design your own levels freehand and play it as a 2D platformer game.

Changes

This release brings Sound Effects and Menus to the game.

New features:

  • Added some User Documentation to ship with the game which teaches you how to create your own custom Doodads and program them with JavaScript. More documentation to come with time.
  • Sound effects! Several doodads have a first pass at sound effects using some free sounds I found online. More doodads still need sounds and the existing sounds are by no means final. Buttons, switches, doors and keys have sound effects so far.
  • The game now has a Menu Bar with pull-down menus in the Editor Mode instead of just a top panel with New/Save/Open buttons.

Guidebook

The Guidebook contains some help and documentation on the game. In particular, it teaches you how you can create custom doodads and program them with JavaScript. Future releases of the game will include more fleshed-out versions of the guidebook.

Download

Mac users: let me know if the performance is horrible or if sound effects aren't working. I only tested the game briefly in a virtual machine that I use to build the game, and it only ran at ~30 FPS and my VM had no audio drivers. Press the F3 key to open the debug menu and see the frames per second.

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Go UI Toolkit and Other Libraries
May 1, 2020 by Noah

As I've been working on my videogame (codenamed Project: Doodle), I created a few Go libraries that I'm releasing as open source software that can be used to create other, unrelated applications (other games, other kinds of graphical programs, etc.)

These libraries are still in "early development" (meaning I may change their API around a bit as I refactor and add new features) but they are generally stable and I'm good about documenting changes in the code, if you wanna play around with these and aren't afraid of occasional breakages.

This is just a quick blog post letting people know about these libraries. I'll probably post again when these libraries reach a stable "1.0" state, where their API won't change and they'll have a degree of stability guaranteed to them.

I'm generally using GitHub as a mirror for these libraries and will accept issues and pull requests filed on GitHub (I wouldn't expect or want anybody to sign up an account on my local Gitea instance).

render: A Rendering Engine (SDL2, HTML Canvas)

render example screenshot

I decided early on for my game that I would be using libSDL for my game's graphics, audio, controller inputs and so on -- at least to start out with. I didn't want my game to rely on SDL though: I needed the flexibility to swap it out for OpenGL or Vulkan or Metal or any other back-end driver as needed to expand my game to future platforms.

So I created go/render as a "rendering engine library" for 2D graphics in Go. It presents an API interface for drawing pixels to the screen which can be implemented by various back-end "drivers" that do the real work.

Currently it supports SDL2 for desktop applications (Linux, macOS and Windows) as well as a WebAssembly driver that uses the HTML Canvas API. (I have a build of my game to WebAssembly, but WASM performance is not great yet.) Examples are included in the git repo for both desktop and WASM applications.

ui: A User Interface Toolkit (SDL2, HTML Canvas)

ui toolkit screenshot

My game also required a UI toolkit for easily adding buttons, panels, windows and basic user interface controls to the game.

There were a handful of options I could've gone with: desktop UI toolkits like Gtk+ or Qt could've wrapped around my SDL surface and provided menu bars and button toolbars, but I wanted to minimize my inclusion of C or C++ libraries with my Go application. I was fortunate that go-sdl2 provided clear documentation how to cross-compile my program for Windows, and I didn't wanna push my luck bringing in yet more C libraries that might've made my game harder to ship. This also ruled out some potential SDL2-based C libraries for UI controls as well.

So I created my own UI toolkit in Go, and it uses my go/render library as its graphics back-end: meaning my UI toolkit can work for SDL2 desktop applications and as WebAssembly applets.

The library's API is inspired by the Tk GUI toolkit which I had prior experience with in Perl and Python (see my Tk blog posts).

It currently supports widgets such as Labels, Buttons, Checkboxes, Tooltips and (virtual) Windows (with title bars that can be dragged around and closed). The Frame widget allows easy arrangement of child widgets using Tk-style Pack and Place controls.

Future planned widgets include: menus and menu bars, tabbed frames, text input boxes, scrollbars and sliders (in roughly that order).

audio: A Simple Audio Engine

The newest library implements a simple audio engine for playing music and sound effects. My game needed these, and doesn't have any fancy requirements yet, so this library provides the basics for loading music (.mp3 and .ogg) and sounds (.wav) and playing, pausing and stopping them.

Currently it only supports the SDL2 (Mixer) driver. This module is independent from go/render and you can mix and match (or not) that library.

Future planned features include: adding WebAssembly support (Web Audio API), maybe branch out to other back-end drivers as needed.

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Project: Doodle v0.1.0
April 13, 2020 by Noah

Here is another alpha release of the game I've been working on, codenamed Project: Doodle.

Doodle v0.1.0 Screenshot

About Project: Doodle

Doodle is a "drawing-based maze game" where you can draw your own levels freehand and then play them as a 2D platformer game. You can drag premade "doodads" such as buttons, doors and keys into your level to add some interaction to it.

The game is being designed to be very friendly for custom content: you can create your own doodads and program their behavior in JavaScript, and eventually, when you share your levels with others you can bundle the custom doodads, wallpapers and other assets with the level file to enable others to easily play your custom map without needing to go hunt down all the custom assets you used.

The game comes with the "doodad.exe" command-line program which helps in creating custom doodads; it's the tool I used to create the default ones that come with the game.

Downloads

The game is free to download in its alpha versioned form.

Note: the program isn't signed yet for Windows and Mac so you may need to click through some warning dialogs. This is an early alpha release and I'll get the signatures sorted out eventually in future releases.

Mac users: let me know if the performance is okay. I only tested running it in the QEMU virtual machine I built it in, and it got < 30 frames per second there (hit F3 key in-game to see the FPS). Linux binaries and Windows (in Wine) ran at full 60 FPS for me.

Changes

New doodads:

  • Start Flag: drag this into your level to set where the player character will spawn. There should only be one per level.
  • Crumbly Floor: a rocky floor that breaks and falls away after a couple seconds when the player (or other mobile doodad) walks onto it.
  • State Blocks: blue and orange blocks that toggle between solid and passable when the corresponding ON/OFF button is touched.

New features:

  • An inventory overlay now appears in Play Mode when the player character picks up one of the colored keys.
  • While editing a level, you can click the new "Options" button in the top menu to open the level settings window (like the one you see when creating a new level): to change the wallpaper image or the page type.

Other changes:

  • Added better platforming physics to the player character: acceleration and friction when walking.
  • The colored Locked Door doodads have been re-designed to be shown in a side-view perspective and have an open and closed state in either direction.
  • Tooltips added to various buttons in the Editor to show names of doodads and functions of various buttons.

Cheat Codes

In case you happen to clip out of bounds in the game and fall to the bottom of the map, press the Enter key to open the in-game developer console and type in cheats like these:

  • import antigravity turns off gravity for the player character; arrow keys freely move you in any direction.
  • ghost mode turns off collision detection for the player, allowing you to pass through walls, floors and solid doodads.

The README.md contains more.

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A drawing-based maze game
July 9, 2019 (updated July 18, 2019) by Noah

I've been working on a videogame the past couple of years, off and on. It's called...

...for now. I have a better name picked out for it, but I'm going to be callling it Project: Doodle (while it's in alpha) so that the finished version will be distinct from the alpha versions, of which it may end up looking nothing like!

The theme of Doodle is centered around hand-drawn, side-scrolling platformer type mazes. You can draw your own levels using freehand and basic drawing tools, color in some fire or water, and drag in pre-made "Doodads" like buttons, keys and doors to add some interaction to your level.

Read more for a screenshot, more information and alpha version download links (Linux, Windows and Mac OS).

Read more...

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