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Distribute shadow map update over multiple frames to reduce stutter (#11422)

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Reduces stutter and freezes when playing.

 * Maintains double SM and SM Color textures
 * Light frustum update triggers incremental generation of shadow map into secondary 'future' textures.
 * Every incremental update renders a portion of the shadow draw list (split equally).
 * After defined number of frames (currently, 4), 'future' and 'current' textures are swapped, and DirectionalLight 'commits' the new frustum to use when rendering shadows on screen.

Co-authored-by: sfan5 <sfan5@live.de>
This commit is contained in:
x2048
2021-07-25 12:36:23 +02:00
committed by GitHub
parent ff2d2a6e93
commit bf3acbf388
10 changed files with 224 additions and 72 deletions
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2
src/defaultsettings.cpp
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@@ -272,7 +272,7 @@ void set_default_settings()
settings->setDefault("shadow_map_color", "false");
settings->setDefault("shadow_filters", "1");
settings->setDefault("shadow_poisson_filter", "true");
settings->setDefault("shadow_update_time", "0.2");
settings->setDefault("shadow_update_frames", "8");
settings->setDefault("shadow_soft_radius", "1.0");
settings->setDefault("shadow_sky_body_orbit_tilt", "0.0");