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Code Issues 123 Wiki Activity

Enable instancing

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This commit is contained in:
Hirek
2026-05-09 23:29:20 +02:00
parent b7283d8fb9
commit 587077629f
14 changed files with 304 additions and 50 deletions
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10
rendering/geometrybank.h
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@@ -119,6 +119,8 @@ public:
auto append( gfx::vertex_array &Vertices, gfx::userdata_array& Userdata, gfx::geometry_handle const &Geometry ) -> bool;
// draws geometry stored in specified chunk
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 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 {
@@ -180,6 +182,11 @@ private:
virtual void replace_( gfx::geometry_handle const &Geometry ) = 0;
// draw() subclass details
virtual auto draw_( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams ) -> std::size_t = 0;
// draw_instanced() subclass details. Default implementation falls back to N regular draws.
virtual auto draw_instanced_( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, std::size_t const InstanceCount, unsigned int const Streams ) -> std::size_t {
std::size_t count { 0 };
for( std::size_t i = 0; i < InstanceCount; ++i ) { count += draw_( Geometry, Units, Streams ); }
return count; }
// resource release subclass details
virtual void release_() = 0;
};
@@ -208,6 +215,9 @@ public:
auto append( gfx::vertex_array &Vertices, gfx::userdata_array &Userdata, gfx::geometry_handle const &Geometry ) -> bool;
// draws geometry stored in specified chunk
void draw( gfx::geometry_handle const &Geometry, unsigned int const Streams = basic_streams );
// 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 );
template <typename Iterator_>
void draw( Iterator_ First, Iterator_ Last, unsigned int const Streams = basic_streams ) {
while( First != Last ) {