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Code Issues 157 Wiki Activity

Draw the instances from the GPU with multi draws, the model block of each draw read by its number

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Hirek
2026-10-18 00:47:05 +02:00
parent 7221c153dd
commit 494304903f
18 changed files with 609 additions and 64 deletions
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22
rendering/opengl46/opengl46geometrybank.cpp
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@@ -274,6 +274,28 @@ opengl46_vaogeometrybank::draw_indirect_( gfx::geometry_handle const &Geometry,
}
}
// draw_indirect_multi() subclass details — the commands come from the bound draw indirect buffer, the chunk tells the type
// and whether they're indexed
bool
opengl46_vaogeometrybank::draw_indirect_multi_( gfx::geometry_handle const &Geometry, std::intptr_t const Offset, std::uint32_t const Count, std::uint32_t const Stride )
{
setup_buffer();
// the counts of the chunks are in the commands, which may be for chunks other than this one
if( ( false == m_vao.has_value() ) || ( Count == 0 ) ) { return true; }
auto const &chunkrecord = m_chunkrecords.at(Geometry.chunk - 1);
auto const &chunk = gfx::geometry_bank::chunk( Geometry );
m_vao->bind();
if( chunkrecord.index_count > 0 ) {
::glMultiDrawElementsIndirect( chunk.type, GL_UNSIGNED_INT, reinterpret_cast<void const *>( Offset ), static_cast<GLsizei>( Count ), static_cast<GLsizei>( Stride ) );
}
else {
::glMultiDrawArraysIndirect( chunk.type, reinterpret_cast<void const *>( Offset ), static_cast<GLsizei>( Count ), static_cast<GLsizei>( Stride ) );
}
return true;
}
// draw_batch() subclass details — neighbouring non-indexed chunks of the same type are sent with a single GL call.
// The chunks are drawn in the supplied order, same as with a draw_() call for each of them.
std::size_t