void MyPosition::CacheAccuracySector(ref_ptr<dp::TextureManager> mng)
{
int const TriangleCount = 40;
int const VertexCount = 3 * TriangleCount;
float const etalonSector = math::twicePi / static_cast<double>(TriangleCount);
dp::TextureManager::ColorRegion color;
mng->GetColorRegion(df::GetColorConstant(GetStyleReader().GetCurrentStyle(), df::MyPositionAccuracy), color);
glsl::vec2 colorCoord = glsl::ToVec2(color.GetTexRect().Center());
buffer_vector<Vertex, TriangleCount> buffer;
glsl::vec2 startNormal(0.0f, 1.0f);
for (size_t i = 0; i < TriangleCount + 1; ++i)
{
glsl::vec2 normal = glsl::rotate(startNormal, i * etalonSector);
glsl::vec2 nextNormal = glsl::rotate(startNormal, (i + 1) * etalonSector);
buffer.emplace_back(startNormal, colorCoord);
buffer.emplace_back(normal, colorCoord);
buffer.emplace_back(nextNormal, colorCoord);
}
dp::GLState state(gpu::ACCURACY_PROGRAM, dp::GLState::OverlayLayer);
state.SetColorTexture(color.GetTexture());
{
dp::Batcher batcher(TriangleCount * dp::Batcher::IndexPerTriangle, VertexCount);
dp::SessionGuard guard(batcher, [this](dp::GLState const & state, drape_ptr<dp::RenderBucket> && b)
{
drape_ptr<dp::RenderBucket> bucket = move(b);
ASSERT(bucket->GetOverlayHandlesCount() == 0, ());
m_nodes.emplace_back(state, bucket->MoveBuffer());
m_parts[MY_POSITION_ACCURACY].second = m_nodes.size() - 1;
});
dp::AttributeProvider provider(1 /*stream count*/, VertexCount);
provider.InitStream(0 /*stream index*/, GetBindingInfo(), make_ref(buffer.data()));
m_parts[MY_POSITION_ACCURACY].first = batcher.InsertTriangleList(state, make_ref(&provider), nullptr);
ASSERT(m_parts[MY_POSITION_ACCURACY].first.IsValid(), ());
}
dp::BindingInfo const & GetCapBindingInfo() override
{
return GetBindingInfo();
}
