20,741
edits
Compositor: Difference between revisions
Jump to navigation
Jump to search
m
fix spelling
mNo edit summary |
m (fix spelling) |
||
| (5 intermediate revisions by 2 users not shown) | |||
| Line 11: | Line 11: | ||
|description = Dynamic rendering pipeline configured via the property tree and XML | |description = Dynamic rendering pipeline configured via the property tree and XML | ||
|status = Stable | |status = Stable | ||
|developers = Fernando García Liñán | |developers = Fernando García Liñán <ref>https://sourceforge.net/u/fgarlin/profile/</ref> | ||
|changelog = https://sourceforge.net/u/fgarlin/profile/feed.rss | |||
|folders = | |folders = | ||
* {{flightgear file|src/Viewer}} | * {{flightgear file|src/Viewer}} | ||
| Line 76: | Line 77: | ||
== How to enable the Compositor == | == How to enable the Compositor == | ||
Currently the Compositor can only be enabled at compile time via the <code>-DENABLE_COMPOSITOR=ON</code> CMake flag in FlightGear. SimGear doesn't require any extra parameters. Once you have a binary with the Compositor enabled and you run it, you will be presented with the default rendering pipeline. At the time of writing, this is the low spec rendering pipeline. If you want to try the ALS pipeline, start FlightGear with the command line argument: <code>--compositor=Compositor/ALS/als</code> | Currently the Compositor can only be enabled at compile time via the <code>-DENABLE_COMPOSITOR=ON</code> CMake flag in FlightGear. SimGear doesn't require any extra parameters. Once you have a binary with the Compositor enabled and you run it, you will be presented with the default rendering pipeline. At the time of writing, this is the low spec rendering pipeline. If you want to try the [[#ALS|ALS pipeline]], start FlightGear with the command line argument: <code>--compositor=Compositor/ALS/als</code> | ||
If you want to enable shadows on all objects in the ALS pipeline use these options as a startup parameters (in QT GUI or in the commandline) <code>--prop:bool:/sim/rendering/als/shadows/enabled=true</code> and <code>--prop:int:/sim/rendering/als/shadows/sun-atlas-size=2048</code>. If you feel like the shadows are too low-quality (specially in the cockpit), increase the shadow resolution to 4096 or 8192 instead of 2048. | If you want to enable shadows on all objects in the ALS pipeline use these options as a startup parameters (in QT GUI or in the commandline) <code>--prop:bool:/sim/rendering/als/shadows/enabled=true</code> and <code>--prop:int:/sim/rendering/als/shadows/sun-atlas-size=2048</code>. If you feel like the shadows are too low-quality (specially in the cockpit), increase the shadow resolution to 4096 or 8192 instead of 2048. | ||
If you are having trouble with lights using an integrated GPU and the Mesa drivers under Linux, try starting FlightGear with the environment variable <tt>MESA_GL_VERSION_OVERRIDE="3.1COMPAT"</tt> | |||
== Notes for aircraft developers == | == Notes for aircraft developers == | ||
| Line 200: | Line 203: | ||
* Improve the culling masks (simgear/scene/util/RenderConstants.hxx). The CASTSHADOW_BIT flag is present in almost every object in the scene graph. Turning this flag off for trees, random buildings and other geometry intensive objects improves framerates by a very considerable amount. Should the user be able to select which objects cast shadows? | * Improve the culling masks (simgear/scene/util/RenderConstants.hxx). The CASTSHADOW_BIT flag is present in almost every object in the scene graph. Turning this flag off for trees, random buildings and other geometry intensive objects improves framerates by a very considerable amount. Should the user be able to select which objects cast shadows? | ||
* Should the terrain cast shadows? The terrain is rarely steep enough to cast shadows. Apart from that, the terrain in FlightGear messes with automatic near/far computations for the shadow passes since the geometry is not tessellated enough. Also, the terrain LOD is not good enough to have decent cull times at far cascades. | * Should the terrain cast shadows? The terrain is rarely steep enough to cast shadows. Apart from that, the terrain in FlightGear messes with automatic near/far computations for the shadow passes since the geometry is not tessellated enough. Also, the terrain LOD is not good enough to have decent cull times at far cascades. | ||
* Adding a "internal only" shadow flag for aircraft developers. This allows farther shadow cascades to cull complex objects that are only visible in the nearest cascades. (Very important optimization for | * Adding a "internal only" shadow flag for aircraft developers. This allows farther shadow cascades to cull complex objects that are only visible in the nearest cascades. (Very important optimization for aircraft with complex cockpit geometry). | ||
* Vegetation shadows will be done by the "legacy" method currently in use. Shadow mapping on vegetation is much more expensive in terms of performance and the current algorithm does the job well enough. <ref>https://forum.flightgear.org/viewtopic.php?f=47&p=357606</ref> | * Vegetation shadows will be done by the "legacy" method currently in use. Shadow mapping on vegetation is much more expensive in terms of performance and the current algorithm does the job well enough. <ref>https://forum.flightgear.org/viewtopic.php?f=47&p=357606</ref> | ||
| Line 515: | Line 518: | ||
* Clustered shading crashes FG if compiled under OSG 3.6. This is related to osg::TextureBuffer changing definition from OSG 3.4 to OSG 3.6 (Images vs BufferData). | * Clustered shading crashes FG if compiled under OSG 3.6. This is related to osg::TextureBuffer changing definition from OSG 3.4 to OSG 3.6 (Images vs BufferData). | ||
* Relative path Effects in aircrafts don't work. This is '''not''' permanent, they will work again once the Compositor replaces the legacy renderer. | * Relative path Effects in aircrafts don't work. This is '''not''' permanent, they will work again once the Compositor replaces the legacy renderer. | ||
* | * [[Earthview]] doesn't work. | ||
* There is some kind of moiré pattern at certain sunlight angles (specially at dusk/dawn). | * There is some kind of moiré pattern at certain sunlight angles (specially at dusk/dawn). | ||
* hud.eff doesn't work under the ALS pipeline. | * hud.eff doesn't work under the ALS pipeline. | ||