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Code Issues 145 Wiki Activity

feat(render): a geometry chunk emptied in place, the kind of its primitive told; a chunk gaining or losing its userdata gets a new buffer

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Erase() empties a chunk and keeps its handle to be filled again, for geometry made anew as it changes. Primitive() tells whether a chunk holds triangles or strips, -1 from a renderer which doesn't know. The VAO bank reused the buffer of a chunk of the same length even when the userdata came or went, the layout of the buffer differing then.
This commit is contained in:
maj00r
2026-11-03 21:50:31 +01:00
parent 823807201c
commit a24118baf7
8 changed files with 88 additions and 2 deletions
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36
rendering/geometrybank.cpp
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@@ -318,6 +318,20 @@ geometry_bank::append( gfx::vertex_array &Vertices, userdata_array &Userdata, gf
return replace( Vertices, Userdata, Geometry, gfx::geometry_bank::chunk( Geometry ).vertices.size() );
}
void
geometry_bank::erase( gfx::geometry_handle const &Geometry ) {
if( ( Geometry.chunk == 0 ) || ( Geometry.chunk > m_chunks.size() ) ) { return; }
auto &chunk = gfx::geometry_bank::chunk( Geometry );
if( chunk.vertices.empty() && chunk.indices.empty() ) { return; }
gfx::vertex_array().swap( chunk.vertices );
gfx::index_array().swap( chunk.indices );
gfx::userdata_array().swap( chunk.userdata );
replace_( Geometry );
}
// draws geometry stored in specified chunk
std::size_t
geometry_bank::draw( gfx::geometry_handle const &Geometry, gfx::stream_units const &Units, unsigned int const Streams ) {
@@ -360,6 +374,13 @@ geometry_bank::vertices( gfx::geometry_handle const &Geometry ) const {
return geometry_bank::chunk( Geometry ).vertices;
}
// kind of geometry of specified chunk
unsigned int
geometry_bank::primitive( gfx::geometry_handle const &Geometry ) const {
return geometry_bank::chunk( Geometry ).type;
}
// provides direct access to vertex user data of specfied chunk
userdata_array const &
geometry_bank::userdata( gfx::geometry_handle const &Geometry ) const {
@@ -418,6 +439,14 @@ geometrybank_manager::append( gfx::vertex_array &Vertices, userdata_array &Userd
return bank( Geometry ).first->append( Vertices, Userdata, Geometry );
}
void
geometrybank_manager::erase( gfx::geometry_handle const &Geometry ) {
if( ( Geometry.bank == 0 ) || ( Geometry.bank > m_geometrybanks.size() ) ) { return; }
bank( Geometry ).first->erase( Geometry );
}
// draws geometry stored in specified chunk
void
geometrybank_manager::draw( gfx::geometry_handle const &Geometry, unsigned int const Streams ) {
@@ -483,6 +512,13 @@ geometrybank_manager::vertices( gfx::geometry_handle const &Geometry ) const {
return bank( Geometry ).first->vertices( Geometry );
}
// kind of geometry of specified chunk
unsigned int
geometrybank_manager::primitive( gfx::geometry_handle const &Geometry ) const {
return bank( Geometry ).first->primitive( Geometry );
}
// provides direct access to vertex user data of specfied chunk
gfx::userdata_array const &
geometrybank_manager::userdata( gfx::geometry_handle const &Geometry ) const {