Difference between revisions of "Field of Vision"

From RogueBasin
Jump to navigation Jump to search
(FastFOV was miscategorized)
m (more specific)
 
(7 intermediate revisions by 5 users not shown)
Line 16: Line 16:
* [[Digital field of view]] (new and unheard of)
* [[Digital field of view]] (new and unheard of)
* [[eligloscode|Very simple line of sight pseudo-code.]]
* [[eligloscode|Very simple line of sight pseudo-code.]]
* [[Quick and dirty FOV/LOS]]
* [[LOS using strict definition]] (new and unheard of)
* [[My Algorithm by Adam Milazzo in Dart]]


== Refinements ==
== Refinements ==
Line 27: Line 30:
== Available Libraries ==
== Available Libraries ==


* [[libfov]] is a [[Cpp|C++]] library made by [[Blue Puyo]], which supports both circular FoV and Beams using [[Shadow casting]]
* [[SquidLib]] is a [[Java]] library made by [[Eben Howard]] which supports several types of FoV, including translucence properties. The shadowcasting implementation is shorter and easier to read than most other implementations.
* [[libfov]] is a [[C]] library made by [[Blue Puyo]], which supports both circular FoV and Beams using [[Shadow casting]]
* [[permissive-fov]] is a library for both C and C++ written by [[duerig|Jonathon Duerig]]. It uses [[Permissive Field of View]], and supports arbitrary shaping of FoV using visitation masks. It does not support Beams.
* [[permissive-fov]] is a library for both C and C++ written by [[duerig|Jonathon Duerig]]. It uses [[Permissive Field of View]], and supports arbitrary shaping of FoV using visitation masks. It does not support Beams.
* [[libtcod]] is a C/C++/python library which, while not dedicated to fov, contains implementations of basic raycasting, los_rays (a.k.a. diamond raycasting), recursive shadowcasting, restrictive precise angle shadowcasting and precise permissive fov.
* [[libtcod]] is a C/C++/python library which, while not dedicated to fov, contains implementations of basic raycasting, los_rays (a.k.a. diamond raycasting), recursive shadowcasting, restrictive precise angle shadowcasting and precise permissive fov.

Latest revision as of 08:48, 11 October 2023

Some of the most important features on roguelikes, including the presentation of the area that surrounds the player character, require to check the visibility of an object from a given point on the map. For example, it may be necessary to know which parts of map are visible from the place the player character is standing to draw those parts of map on the screen.

There are basically two ways to achieve this; by using Line of Sight to check all the map squares in range, which is a slow method as it repeats most of the calculations multiple times, or by calculating the Field of Vision as a whole.

Approaches

Some of the most common approaches to field of vision are:

Refinements

There are other refinements that can be applied to any approach:

Studies

Available Libraries

  • SquidLib is a Java library made by Eben Howard which supports several types of FoV, including translucence properties. The shadowcasting implementation is shorter and easier to read than most other implementations.
  • libfov is a C library made by Blue Puyo, which supports both circular FoV and Beams using Shadow casting
  • permissive-fov is a library for both C and C++ written by Jonathon Duerig. It uses Permissive Field of View, and supports arbitrary shaping of FoV using visitation masks. It does not support Beams.
  • libtcod is a C/C++/python library which, while not dedicated to fov, contains implementations of basic raycasting, los_rays (a.k.a. diamond raycasting), recursive shadowcasting, restrictive precise angle shadowcasting and precise permissive fov.
  • rlforj - Java library featuring several FoV algorithms.

See Also