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Code Issues 156 Wiki Activity

perf(sleepers): the instances of the sleepers and timbers of a track sent to the gpu once, as it's laid, and kept there in a buffer of their own; in each pass the runs of them in sight turned by the modelviews of their cells into the instance buffer of the frame by a compute pass, one dispatch and one barrier a pass, and drawn in one instanced draw for each model, part and level of detail, in place of the cpu turning every instance every frame

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maj00r
2026-10-24 01:40:34 +02:00
parent f155956669
commit 85b76acca5
12 changed files with 444 additions and 92 deletions
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16
gl/streambuffer.cpp
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@@ -141,6 +141,17 @@ void gl::frame_stream::next_frame()
}
GLintptr gl::frame_stream::push(void const *Data, GLsizeiptr Size)
{
auto const offset{reserve(Size)};
auto const &current{m_slots[m_slot]};
if (current.data != nullptr)
std::memcpy(current.data + offset, Data, static_cast<std::size_t>(Size));
else
glNamedBufferSubData(current.buffer, offset, Size, Data);
return offset;
}
GLintptr gl::frame_stream::reserve(GLsizeiptr Size)
{
auto *current{&m_slots[m_slot]};
auto offset{align_up(m_fill, m_alignment)};
@@ -167,13 +178,8 @@ GLintptr gl::frame_stream::push(void const *Data, GLsizeiptr Size)
glFinish();
++m_waits;
}
current = &m_slots[m_slot];
offset = m_start;
}
if (current->data != nullptr)
std::memcpy(current->data + offset, Data, static_cast<std::size_t>(Size));
else
glNamedBufferSubData(current->buffer, offset, Size, Data);
m_fill = offset + Size;
return offset;
}