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Code Issues 157 Wiki Activity

perf(tracks): geometry of neighbouring tracks of a cell which share the material drawn together, with one material bind and one upload of model data; chunks of the same geometry bank sent to the gpu in a single multi draw call

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Hirek
2026-10-07 17:13:32 +02:00
parent 398fdac6a1
commit e335b89fcb
6 changed files with 165 additions and 16 deletions
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9
rendering/geometrybank.h
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@@ -121,6 +121,8 @@ public:
auto draw( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams = basic_streams ) -> std::size_t;
// draws geometry stored in specified chunk N times via glDrawElementsInstanced*
auto draw_instanced( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, std::size_t const InstanceCount, unsigned int const Streams = basic_streams ) -> std::size_t;
// draws geometry stored in supplied sequence of chunks of the bank, in their order. the bank is free to combine them into fewer draw calls
auto draw_batch( gfx::geometry_handle const *First, gfx::geometry_handle const *Last, gfx::stream_units const &Units, unsigned int const Streams = basic_streams ) -> std::size_t;
// draws geometry stored in supplied list of chunks
template <typename Iterator_>
auto draw( Iterator_ First, Iterator_ Last, gfx::stream_units const &Units, unsigned int const Streams = basic_streams ) ->std::size_t {
@@ -187,6 +189,11 @@ private:
std::size_t count { 0 };
for( std::size_t i = 0; i < InstanceCount; ++i ) { count += draw_( Geometry, Units, Streams ); }
return count; }
// draw_batch() subclass details. Default implementation falls back to regular draw of each chunk.
virtual auto draw_batch_( gfx::geometry_handle const *First, gfx::geometry_handle const *Last, gfx::stream_units const &Units, unsigned int const Streams ) -> std::size_t {
std::size_t count { 0 };
for( ; First != Last; ++First ) { count += draw_( *First, Units, Streams ); }
return count; }
// resource release subclass details
virtual void release_() = 0;
};
@@ -218,6 +225,8 @@ public:
// draws geometry stored in specified chunk InstanceCount times via GPU instancing.
// The shader reads per-instance modelview matrices from instance_ubo[gl_InstanceID].
void draw_instanced( gfx::geometry_handle const &Geometry, std::size_t const InstanceCount, unsigned int const Streams = basic_streams );
// draws geometry stored in supplied sequence of chunks, in their order. neighbouring chunks of the same bank are passed to it together
void draw_batch( gfx::geometry_handle const *First, gfx::geometry_handle const *Last, unsigned int const Streams = basic_streams );
template <typename Iterator_>
void draw( Iterator_ First, Iterator_ Last, unsigned int const Streams = basic_streams ) {
while( First != Last ) {