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Code Issues 152 Wiki Activity

fix(editor): a track dragged around no longer piles copies of its geometry up in the graphics memory

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The geometry of a track made anew, ten times a second while it's
dragged, only forgot the chunks it had: the bank kept them all, so the
buffer of the section grew by the whole track and its neighbours each
time and was sent to the gpu in full again. Ten rebuilds of a test
scenery took the bank from 2 to 29 MB; a long session would run the
card out of memory. The old chunks are erased from the bank now, but
for those of a moving nose, laid again in place, and a moved traction
wire drops its old one too.

A chunk swapped for one without the extra vertex data kept the flag of
having it and the upload read from an empty array; the buffer is made
again when that changes.
This commit is contained in:
maj00r
2026-10-21 08:41:50 +02:00
parent 33892c1936
commit 8903d15b94
10 changed files with 55 additions and 1 deletions
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1
rendering/renderer.h
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@@ -59,6 +59,7 @@ public:
virtual auto Replace(gfx::vertex_array &Vertices, gfx::userdata_array &Userdata, gfx::geometry_handle const &Geometry, int const Type, const std::size_t Offset = 0) -> bool = 0;
// adds supplied vertex data at the end of specified chunk
virtual auto Append(gfx::vertex_array &Vertices, gfx::userdata_array &Userdata, gfx::geometry_handle const &Geometry, int const Type) -> bool = 0;
virtual void Erase( gfx::geometry_handle const &Geometry ) {}
// provides direct access to index data of specfied chunk
virtual auto Indices( gfx::geometry_handle const &Geometry ) const->gfx::index_array const & = 0;
// provides direct access to vertex data of specfied chunk