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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
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GPG key ID: 4AEE18F83AFDEB23
10 changed files with 224 additions and 72 deletions
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17
src/client/game.cpp
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@ -609,7 +609,6 @@ struct GameRunData {
float jump_timer;
float damage_flash;
float update_draw_list_timer;
float update_shadows_timer;
f32 fog_range;
@ -3881,10 +3880,8 @@ void Game::updateFrame(ProfilerGraph *graph, RunStats *stats, f32 dtime,
changed much
*/
runData.update_draw_list_timer += dtime;
runData.update_shadows_timer += dtime;
float update_draw_list_delta = 0.2f;
bool draw_list_updated = false;
v3f camera_direction = camera->getDirection();
if (runData.update_draw_list_timer >= update_draw_list_delta
@ -3894,18 +3891,10 @@ void Game::updateFrame(ProfilerGraph *graph, RunStats *stats, f32 dtime,
runData.update_draw_list_timer = 0;
client->getEnv().getClientMap().updateDrawList();
runData.update_draw_list_last_cam_dir = camera_direction;
draw_list_updated = true;
}
if (ShadowRenderer *shadow = RenderingEngine::get_shadow_renderer()) {
update_draw_list_delta = shadow->getUpdateDelta();
if (m_camera_offset_changed ||
(runData.update_shadows_timer > update_draw_list_delta &&
(!draw_list_updated || shadow->getDirectionalLightCount() == 0))) {
runData.update_shadows_timer = 0;
updateShadows();
}
if (RenderingEngine::get_shadow_renderer()) {
updateShadows();
}
m_game_ui->update(*stats, client, draw_control, cam, runData.pointed_old, gui_chat_console, dtime);
@ -4062,7 +4051,7 @@ void Game::updateShadows()
shadow->getDirectionalLight().setDirection(sun_pos);
shadow->setTimeOfDay(in_timeofday);
shadow->getDirectionalLight().update_frustum(camera, client);
shadow->getDirectionalLight().update_frustum(camera, client, m_camera_offset_changed);
}
/****************************************************************************