Module coordinates 

Tile and pixel positions and dimensions.

Coordinate systems

The interface works with two types of coordinates: tile and pixel.

Tile coordinates are given in (row,column) pairs, while pixel coordinates are defined as (x,y) pairs, where $x$ is understood to be the horizontal component and $y$ the vertical component.

Both coordinate systems are left-handed, however they are oriented differently:

• The tile coordinate origin is taken to be the upper-left, with rows increasing towards the bottom and columns increasing towards the right.
• The pixel coordinate origin is taken to be the bottom-left, with $x$ increasing towards the right and $y$ increasing towards the top.

The main layout component is the view Canvas component which contains a coordinates field.

Presentation backends

Different presentation backends may have their own coordinate systems.

Curses

TODO

OpenGL

The OpenGL rendering backend supports both pixel-based and tile-based rendering.

By default the 2D camera is centered with (0,0) in the center of the screen. In the presentation implementation, the camera is moved so that (0,0) is at the bottom-left of the screen.

TODO: more

Re-exports

pub use self::position::Position;

pub use self::dimensions::Dimensions;

Modules

dimensions

position

Enums

Coordinates

Kind

Functions

pixel_to_tile

Convert a screen pixel (x, y) coordinate to a tile (row, column) coordinate

pixel_to_tile_aabb

Convert a screen pixel (x, y) AABB to tile (row, column) coordinate AABB

tile_to_pixel

Convert a (row, column) coordinate to a screen pixel (x, y) coordinate

tile_to_pixel_aabb

Convert a (row, column) AABB to a screen pixel (x, y) coordinate AABB