There are also multiple weapons both primary (lasers) and secondary (missiles), the player can active or deactivate individual lasers, multiple lasers can be active at the same time, and switch between available missile launchers. The missiles have target locking or they can be just simple fire and forget missiles.

I have also implemented some auto-piloting functionality such as automatic speed keeping either at full or half speed. Or the ability to match the speed of your current target, useful for pursuing someone while blasting them to pieces. There is also an afterburner that allows you to go slightly above the ships speed limit and accelerates faster than the ordinary engines.

The ship control itself is not realistic and is more like driving a car, I found this to be more fun than the realistic alternative.

Enough talk, here are the screen-shots, showing everything from the main menu to explosions to me getting shot at.

The game is written in C++ with HGE. I have been working on it for about 12 months but the total amount of time spent is probably closer to 60 hours, not including the previous incarnations of the game.

It is made for Windows but it may work on Linux through wine.

It can be downloaded here.
http://www.rymdspelet.net/

I have embedded a video showcasing some gameplay, or you can watch it in hd here.

I have also modified the terrain shader to use gray-scale detail textures instead of color textures. This makes it possible to combine four detail textures into one texture, one for each channel, resulting in less texture fetches. I use a base color layer on the terrain to bring back the colors and the detail textures are also used as height maps to calculate a nice per pixel normal. All in all this saves a couple of texture fetches and quite a lot of texture memory as only two textures are used instead of 9 (1 base + 1 detail compared to 1 base + 4 detail color + 4 detail normal).

There are also some more visual changes like icons for most of the buttons and the three main areas, the conversation list, the tree and the line editor can be resized.

A conversation is a line that may have several lines or responses. It may also have an action script that is executed when the line is activated. There can also be a condition script and if it evaluates to true then the line is visible. This means that there can be several roots in a conversation and the one that is used is the first one whose condition evaluates to true.

A line can also be a link to another line which means that the conversation jumps to that line instead, this can be great for conversations that repeat.

This is what I got so far:

class ConversationLine {
public:
	Guid ID;
	Guid Link; // optional
	string Condition; // Optional
	string Action; // Optional
	string Text;
	List<ConversationLine> Lines;
};
 
typedef List<ConversationLine> Conversation;

I made an editor for this conversation system in C# and I will probably implement it in the actual game as soon as I have got the GUI up and running. I have attached a screenshot of the editor below.

The simple lexer and the complete parser was made using a parser combinator library called JSParse and it worked out fine except that it does not keep track of line numbers, columns or which parser that failed so it is really hard to get any good error messages. There were also a couple of bugs in the butnot-parser and in the caching for the choice parser. I managed to fix both of them and the functioning version can be found at our git repository.

We do not support type classes at the moment but we will most likely fix that in the two coming weeks as we really want them in the final presentation of the project.

The source code for the whole project can be found at our git repository, feel free to clone it. http://github.com/johang88/haskellinjavascript

I have also put up an online demo at http://hiji.tinyrocket.se that works in firefox and chrome but internet explorer remains untested. The demo has a small part of the standard prelude library the definition of which can be found here http://hiji.tinyrocket.se/hs/Prelude.hs