Simulation vs Render Time Scope: Difference between revisions
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'''Simulation Time Scope''' is working with the '''calculated''' position of objects. | '''Simulation Time Scope''' is working with the '''calculated''' position of objects. | ||
* It is updated on a lower frequency than the '''rendered''' position in order to save performance. {{cn}} | * It is updated on a lower frequency than the '''rendered''' position in order to save performance. {{cn}} | ||
* Refresh frequency is lowered the further the object is from the camera. {{cn}} | * Refresh frequency is lowered the further the object is from the camera. {{cn}} | ||
=== Render Time Scope === | === Render Time Scope === | ||
| Line 26: | Line 25: | ||
* For visual (e.g HUD-related) operations, use the [[:Category:Command Group: Render Time Scope|render time scope scripting commands]] (e.g [[getPosATLVisual]]) | * For visual (e.g HUD-related) operations, use the [[:Category:Command Group: Render Time Scope|render time scope scripting commands]] (e.g [[getPosATLVisual]]) | ||
* "Normal" commands (e.g [[getPosATL]]) are to be used if the position | * "Normal" commands (e.g [[getPosATL]]) are to be used if the position is not updated frequently and the effect is not visible to players. | ||
<spoiler text="See a showcase video">{{Youtube|6xUw0K292sw|[https://www.youtube.com/watch?v{{=}}6xUw0K292sw Video Showcase]||600}}</spoiler> | |||
{{Clear}} | {{Clear}} | ||
== Before Simulation and Render Separation == | |||
== Before Simulation and Render | |||
From {{ofp}} to {{arma2oa}} v1.59, the '''simulation''' first updated the world's state (units position) ''then'' the visual '''rendering''' was done.<br> | From {{ofp}} to {{arma2oa}} v1.59, the '''simulation''' first updated the world's state (units position) ''then'' the visual '''rendering''' was done.<br> | ||
| Line 40: | Line 39: | ||
== See Also == | == See Also == | ||
* {{ | * {{Link|https://www.bohemia.net/blog/experimental-betas-interpolating-the-future|Experimental betas - Interpolating the future}} blog article | ||
* | * {{Link|link= https://forums.bohemia.net/forums/topic/151099-scripting-discussion-dev-branch/?page=21&tab=comments#comment-2720342|text= Sniperwolf572 forum post}} explanation | ||
* {{Link|https://forums.bohemia.net/profile/832107-grumpy-old-man/|Grumpy Old Man}}'s [https://www.youtube.com/watch?v{{=}}6xUw0K292sw Video Showcase] | |||
[[Category:Scripting Topics]] | [[Category:Scripting Topics]] | ||
[[Category:Introduced with Arma 2: Operation Arrowhead version 1.60]] | |||
Latest revision as of 13:46, 29 May 2023
Definitions
Simulation Time Scope
Simulation Time Scope is working with the calculated position of objects.
- It is updated on a lower frequency than the rendered position in order to save performance. [citation needed]
- Refresh frequency is lowered the further the object is from the camera. [citation needed]
Render Time Scope
Render Time Scope is working with the visual position of objects, which is rendered (estimated) separately from the calculated one.
- It is updated on a very high frequency (presumably on each frame). [citation needed]
- The object's position is interpolated depending on its speed and movement direction.
- Due to interpolation, the position might not be accurate but it is updated frequently, resulting in a smooth motion.
- Usually, render time scope scripting commands should be used when something is visible to the player, such as UI or on-model precision.
Simulation vs Render
For performance concerns, Simulation and Render cycles are separated since Arma 2: Operation Arrowhead v1.60. This means that any object has now "two" positions: the computed one (simulation), and the visual one (render).
- For visual (e.g HUD-related) operations, use the render time scope scripting commands (e.g getPosATLVisual)
- "Normal" commands (e.g getPosATL) are to be used if the position is not updated frequently and the effect is not visible to players.
Before Simulation and Render Separation
From Operation Flashpoint to Arma 2: Operation Arrowhead v1.59, the simulation first updated the world's state (units position) then the visual rendering was done.
Sequencing these operations worked fine only in non-intensive scenarios; as soon as the CPU reached its limits, the simulation frequency was lowered in order to maintain acceptable FPS, resulting in units visually "jumping".
See Also
- Experimental betas - Interpolating the future blog article
- Sniperwolf572 forum post explanation
- Grumpy Old Man's Video Showcase