1. Game variables¶
Note
All the variable names (currently) mean something. For example, gsc means general scale, playing is literal, etc…
Warning
All the variable below are global, and should be accessed using window.<variable name>
1.1 Scale variables¶
1.1.1 gsc - Number¶
The general scale variable. It is used to zoom in and out of the game, and to scale the game according to the player’s size. It defaults at \(0.9\).
1.1.2 csc - Number¶
This is the scale variable used by the canvas, to convert screen coordinates to canvas ones. It doesn’t have any default value.
1.2 State variables¶
1.2.1 playing - Boolean¶
This variable tells wether the game has started or not.
1.3 Game elements, content variables¶
The title may not be clear, but these are variables containing a list of snakes, etc…, with game unit.
- Game unit
- One of the units used by the bot. Please refer to 2.2 Different units.
1.3.1 snake - Object¶
This is the object corresponding to the player’s snake. It contains a lot of useful informations (angle, coordinates, length, width, etc…).
Note
Its value is undefined if the game did not start yet.
1.3.1.1 snake.xx and snake.yy - Number¶
They are the coordinates of the snake, in Game unit.
1.3.1.2 snake.ang - Number¶
This is the angle, in radians, at which the snake is going. It goes from \(0\) to \(2\pi\).
1.3.1.3 snake.nk - String¶
The nickname you choose on login screen. In case you forget…
1.3.2 snakes - Array of objects¶
This is an array containing nearby snakes, including yours. This means you cannot access all snakes to base a strategy upon. The content of each object is almost the same as in the snake object.
It may contain null or undefined objects.
Note
snakes[index].pts contains every components of the snake.
1.3.3 foods - Array of objects¶
An array containing the foods objects. each object has multiple keys:
1.3.3.1 foods[index].xx and foods[index].yy - Number¶
In game unit, position of each food coordinate.
- index
- Arbitrary or generated number to access the (n+1)th element of an array. For example, an index of 5 would access the sixth element of an array.
1.3.3.2 foods[index].sz - Number¶
Size of the food. Each food has a different size. This value can be used to sort foods according to their size.
1.3.4 preys - Array of objects¶
Contains every objects corresponding to a prey. Every object contains the coordinate of the prey under the keys xx and yy.
- preys
- Moving foods, that are ways better and make you grow much more.
1.4 Visual variables¶
Variables containing visual things.
1.4.1 mc - canvas¶
This is the game canvas. It is not a modified DOM object, it is a classic canvas.
Note
You can get the canvas’ context with mc.getContext('2d');
1.4.2 ww and hh - Number¶
They are the window size. They are dynamic read-only values.
1.4.3 xm and ym - Number¶
They stand for ‘x mouse’ and ‘y mouse’ respectively. They are used to control the snake.
Note
It should be in mouse coordinates. Please refer to 2.2 Different units