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Code Issues 139 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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6
rendering/geometrybank.h
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@@ -117,6 +117,7 @@ public:
auto replace( gfx::vertex_array &Vertices, gfx::userdata_array& Userdata, gfx::geometry_handle const &Geometry, std::size_t const Offset = 0 ) -> bool;
// adds supplied vertex data at the end of specified chunk
auto append( gfx::vertex_array &Vertices, gfx::userdata_array& Userdata, gfx::geometry_handle const &Geometry ) -> bool;
void erase( gfx::geometry_handle const &Geometry );
// 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*
@@ -138,6 +139,8 @@ public:
auto vertices( gfx::geometry_handle const &Geometry ) const -> gfx::vertex_array const &;
// provides direct access to vertex user data of specfied chunk
auto userdata( gfx::geometry_handle const &Geometry ) const -> gfx::userdata_array const &;
// kind of geometry of specified chunk, GL_TRIANGLES, GL_TRIANGLE_STRIP...
auto primitive( gfx::geometry_handle const &Geometry ) const -> unsigned int;
protected:
// types:
@@ -220,6 +223,7 @@ public:
auto replace( gfx::vertex_array &Vertices, gfx::userdata_array &Userdata, gfx::geometry_handle const &Geometry, std::size_t const Offset = 0 ) -> bool;
// adds supplied vertex data at the end of specified chunk
auto append( gfx::vertex_array &Vertices, gfx::userdata_array &Userdata, gfx::geometry_handle const &Geometry ) -> bool;
void erase( gfx::geometry_handle const &Geometry );
// 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.
@@ -238,6 +242,8 @@ public:
auto vertices( gfx::geometry_handle const &Geometry ) const -> gfx::vertex_array const &;
// provides direct access to vertex data of specfied chunk
auto userdata( gfx::geometry_handle const &Geometry ) const -> gfx::userdata_array const &;
// kind of geometry of specified chunk
auto primitive( gfx::geometry_handle const &Geometry ) const -> unsigned int;
// sets target texture unit for the texture data stream
auto units() -> gfx::stream_units & { return m_units; }
// provides access to primitives count