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Code Issues 150 Wiki Activity

perf(reflections): environment map drawn one face per frame from the place the update began at, the first update in one go; cells beyond the range of reflected instances left out; time of the reflection pass in the renderer statistics; tracks skipped in shadow passes no longer counted as drawn

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This commit is contained in:
Hirek
2026-10-07 16:17:13 +02:00
parent 7b15b9a017
commit bc99b80191
2 changed files with 46 additions and 13 deletions
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57
rendering/opengl33renderer.cpp
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@@ -635,12 +635,16 @@ void opengl33_renderer::SwapBuffers()
m_debugtimestext.clear();
m_debugtimestext =
"cpu frame total: " + to_string( Timer::subsystem.gfx_color.average() + Timer::subsystem.gfx_shadows.average() + Timer::subsystem.gfx_swap.average(), 2 ) + " ms\n"
"cpu frame total: " + to_string( Timer::subsystem.gfx_color.average() + Timer::subsystem.gfx_shadows.average() + ( Global.gfx_envmap_enabled ? Timer::subsystem.gfx_reflections.average() : 0.f ) + Timer::subsystem.gfx_swap.average(), 2 ) + " ms\n"
+ " color: " + to_string( Timer::subsystem.gfx_color.average(), 2 ) + " ms (" + std::to_string( m_cellqueue.size() ) + " sectors)\n";
if( Global.gfx_shadowmap_enabled ) {
m_debugtimestext +=
" shadows: " + to_string( Timer::subsystem.gfx_shadows.average(), 2 ) + " ms\n";
}
if( Global.gfx_envmap_enabled ) {
m_debugtimestext +=
" reflections: " + to_string( Timer::subsystem.gfx_reflections.average(), 2 ) + " ms\n";
}
m_debugtimestext += " swap: " + to_string( Timer::subsystem.gfx_swap.average(), 2 ) + " ms\n";
if( !Global.gfx_usegles ) {
if (m_gllasttime)
@@ -825,8 +829,10 @@ void opengl33_renderer::Render_pass(viewport_config &vp, rendermode const Mode)
{
// potentially update environmental cube map
m_renderpass.draw_stats = {};
Timer::subsystem.gfx_reflections.start();
if (Render_reflections(vp))
m_renderpass = m_colorpass; // restore color pass settings
Timer::subsystem.gfx_reflections.stop();
setup_env_map(m_env_tex.get());
}
@@ -1385,23 +1391,36 @@ bool opengl33_renderer::Render_reflections(viewport_config &vp)
{
if( Global.reflectiontune.update_interval == 0 ) { return false; }
auto const timestamp{ Timer::GetRenderTime() };
if( ( timestamp - m_environmentupdatetime < Global.reflectiontune.update_interval )
&& ( glm::length2( m_renderpass.pass_camera.position() - m_environmentupdatelocation ) < sq(1000.0)) ) // length2 is better than length for comparing because it does not require sqrt function
{
// run update every 5+ mins of simulation time, or at least 1km from the last location
return false;
if( m_environmentupdateface >= 6 ) {
// no update in progress, check whether it's time for another one
auto const timestamp{ Timer::GetRenderTime() };
if( ( timestamp - m_environmentupdatetime < Global.reflectiontune.update_interval )
&& ( glm::length2( m_renderpass.pass_camera.position() - m_environmentupdatelocation ) < sq(1000.0)) ) // length2 is better than length for comparing because it does not require sqrt function
{
// run update every 5+ mins of simulation time, or at least 1km from the last location
return false;
}
m_environmentupdatetime = timestamp;
m_environmentupdatelocation = m_renderpass.pass_camera.position();
m_environmentupdateface = 0;
}
m_environmentupdatetime = timestamp;
m_environmentupdatelocation = m_renderpass.pass_camera.position();
// an update draws the scene six times, which is too much for a single frame. its cost is spread
// by drawing one face of the map per frame, all of them as seen from the place the update began at.
// the first update is done in one go, as there's nothing to show in the meantime
auto const lastface{ m_environmentready ? m_environmentupdateface : 5 };
glViewport(0, 0, gl::ENVMAP_SIZE, gl::ENVMAP_SIZE);
for (m_environmentcubetextureface = 0; m_environmentcubetextureface < 6; ++m_environmentcubetextureface)
for (; m_environmentupdateface <= lastface; ++m_environmentupdateface)
{
m_environmentcubetextureface = m_environmentupdateface;
m_env_fb->attach(*m_env_tex, m_environmentcubetextureface, GL_COLOR_ATTACHMENT0);
if (m_env_fb->is_complete())
Render_pass(vp, rendermode::reflections);
}
m_env_tex->generate_mipmaps();
if (m_environmentupdateface >= 6)
{
m_env_tex->generate_mipmaps();
m_environmentready = true;
}
m_env_fb->detach(GL_COLOR_ATTACHMENT0);
return true;
@@ -1712,7 +1731,9 @@ void opengl33_renderer::setup_pass(viewport_config &Viewport, renderpass_config
case rendermode::reflections:
{
// modelview
camera.position() = (((true == DebugCameraFlag) && (false == Ignoredebug)) ? Global.pDebugCamera.Pos : Global.pCamera.Pos);
// the faces of the map are drawn over a few frames. each is drawn from the place the camera was at
// when the update began, so they fit together along the edges when the camera moves in the meantime
camera.position() = m_environmentupdatelocation;
glm::dvec3 const cubefacetargetvectors[6] = {{1.0, 0.0, 0.0}, {-1.0, 0.0, 0.0}, {0.0, 1.0, 0.0}, {0.0, -1.0, 0.0}, {0.0, 0.0, 1.0}, {0.0, 0.0, -1.0}};
glm::dvec3 const cubefaceupvectors[6] = {{0.0, -1.0, 0.0}, {0.0, -1.0, 0.0}, {0.0, 0.0, 1.0}, {0.0, 0.0, -1.0}, {0.0, -1.0, 0.0}, {0.0, -1.0, 0.0}};
auto const cubefaceindex = m_environmentcubetextureface;
@@ -2768,7 +2789,13 @@ void opengl33_renderer::Render(cell_sequence::iterator First, cell_sequence::ite
}
case rendermode::reflections:
{
if( Global.reflectiontune.fidelity >= 1 ) {
// a cell lying whole beyond the range the reflections draw model instances at is left out, as each
// of its instances would fail the range test done for it in Render_Instanced() and Render( TAnimModel * ).
// like the cull of the regular passes above, the test goes by the nearest point of the bounding sphere
// of the cell, which holds the locations of all its instances
auto const cellnearestdistance { std::max( 0.0, glm::length( cell->m_area.center - m_renderpass.pass_camera.position() ) - cell->m_area.radius ) };
if( ( Global.reflectiontune.fidelity >= 1 )
&& ( cellnearestdistance <= Global.reflectiontune.range_instances ) ) {
// opaque parts of instanced models -- accumulate into the
// frame-level map; flushed once per unique model after the loop.
for( auto const &bucket : cell->m_instancebuckets_opaque ) {
@@ -4001,10 +4028,14 @@ void opengl33_renderer::Render(scene::basic_cell::path_sequence::const_iterator
if ((std::abs(track->fTexHeight1) < 0.35f) || (track->iCategoryFlag != 2))
{
// shadows are only calculated for high enough roads, typically meaning track platforms
--m_renderpass.draw_stats.paths;
--m_renderpass.draw_stats.drawcalls;
continue;
}
if( Material( track->m_material1 ).shadow_rank > Global.gfx_shadow_rank_cutoff ) {
// skip if the shadow caster rank is too low for currently set threshold
--m_renderpass.draw_stats.paths;
--m_renderpass.draw_stats.drawcalls;
continue;
}
Bind_Material_Shadow(track->m_material1);