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LICENSE
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Copyright 2008-2019 Alex Yatskov
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.

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# Moonfall
# Moonfall #
Moonfall is the name of a game engine that I spent several months developing back in 2008. It leveraged SDL for
graphics, Lua for in-game scripting, and wxWidgets for the built-in developer tools. The cross-platform engine was
@ -12,20 +12,15 @@ friendly bunch, but something about them does not seem right. Everyone is appear
player, who must uncover the truth to survive. In short, this is (as I have described it to my friends), "Harvest Moon
with Murder."
[![Gameplay window](img/gameplay-thumb.png)](img/gameplay.png)
[![Sprite editor](img/sprite-editor-thumb.png)](img/sprite-editor.png)
[![Console window](img/console-thumb.png)](img/console.png)
[![Asset editor](img/asset-editor-thumb.png)](img/asset-editor.png)
[![Map editor](img/map-editor-thumb.png)](img/map-editor.png)
## Technology
## Technology ##
From a technical point of view, the game engine was an exercise in creating a completely data driven game. In
retrospect, it was probably over-engineered, but in general it was flexible and I liked what I could do with it. At the
core of the engine was the `Actor` class, the functionality of which could be expanded through add-on properties. The
property definitions were specified in XML; for example, below is the definition for the playable character:
```xml
```
<Actor alias = "Player.01" dynamic = "1" layer = "4" thumbnail = "Player.01.Idle.S.01">
<Properties>
<Animation />
@ -39,7 +34,8 @@ In addition to the self-explainable `Animation` and `Physics` properties, you ca
Lua script with the actor. Scripts would get notifications about events such as `OnActorUpdate`, during which custom
processing could take place:
```lua
```
function OnActorUpdate(elapsed)
if InputIsKeyTriggered(META_KEY_USE) then
DoActorUse()
@ -66,7 +62,8 @@ Scripts can directly interact with properties on the parent `Actor` and can comm
messaging system. This made it possible to build any game object imaginable by editing a couple of XML files and some
simple scripting.
```lua
```
function DoActorWalk(direction)
if playerAction == ACTION_WALK and playerDirection == direction then
return
@ -95,3 +92,15 @@ end
I eventually stopped work on Moonfall due to a lack of time, combined with the fact that I am not an artist and could
not author the assets required to develop this into a complete game.
## Screenshots ##
[![Gameplay window](https://foosoft.net/projects/moonfall/img/gameplay-thumb.png)](https://foosoft.net/projects/moonfall/img/gameplay.png)
[![Sprite editor](https://foosoft.net/projects/moonfall/img/sprite-editor-thumb.png)](https://foosoft.net/projects/moonfall/img/sprite-editor.png)
[![Console window](https://foosoft.net/projects/moonfall/img/console-thumb.png)](https://foosoft.net/projects/moonfall/img/console.png)
[![Asset editor](https://foosoft.net/projects/moonfall/img/asset-editor-thumb.png)](https://foosoft.net/projects/moonfall/img/asset-editor.png)
[![Map editor](https://foosoft.net/projects/moonfall/img/map-editor-thumb.png)](https://foosoft.net/projects/moonfall/img/map-editor.png)
## License ##
GPL

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