void CircleShape::Draw(ref_ptr<dp::Batcher> batcher, ref_ptr<dp::TextureManager> textures) const
{
int const TriangleCount = 20;
double const etalonSector = (2.0 * math::pi) / static_cast<double>(TriangleCount);
dp::TextureManager::ColorRegion region;
textures->GetColorRegion(m_params.m_color, region);
glsl::vec2 colorPoint(glsl::ToVec2(region.GetTexRect().Center()));
buffer_vector<gpu::SolidTexturingVertex, 22> vertexes;
vertexes.push_back(gpu::SolidTexturingVertex
{
glsl::vec4(glsl::ToVec2(m_pt), m_params.m_depth, 0.0f),
glsl::vec2(0.0f, 0.0f),
colorPoint
});
m2::PointD startNormal(0.0f, m_params.m_radius);
for (size_t i = 0; i < TriangleCount + 1; ++i)
{
m2::PointD rotatedNormal = m2::Rotate(startNormal, (i) * etalonSector);
vertexes.push_back(gpu::SolidTexturingVertex
{
glsl::vec4(glsl::ToVec2(m_pt), m_params.m_depth, 0.0f),
glsl::ToVec2(rotatedNormal),
colorPoint
});
}
dp::GLState state(gpu::TEXTURING_PROGRAM, dp::GLState::OverlayLayer);
state.SetColorTexture(region.GetTexture());
double handleSize = 2 * m_params.m_radius;
drape_ptr<dp::OverlayHandle> overlay = make_unique_dp<dp::SquareHandle>(m_params.m_id,
dp::Center, m_pt,
m2::PointD(handleSize, handleSize),
GetOverlayPriority(), "");
dp::AttributeProvider provider(1, TriangleCount + 2);
provider.InitStream(0, gpu::SolidTexturingVertex::GetBindingInfo(), make_ref(vertexes.data()));
batcher->InsertTriangleFan(state, make_ref(&provider), move(overlay));
}