2a8ebc4906
Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
104 lines
3.5 KiB
C++
104 lines
3.5 KiB
C++
#pragma once
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#include <mln/util/geometry.hpp>
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#include <mln/tile/geometry_tile_data.hpp>
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#include <mln/style/types.hpp>
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#include <mln/gfx/vertex_vector.hpp>
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#include <mln/gfx/index_vector.hpp>
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#include <mln/shaders/segment.hpp>
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#include <mln/util/math.hpp>
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#include <cstdint>
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#include <cstddef>
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#include <vector>
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#include <functional>
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#include <optional>
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namespace mln {
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namespace gfx {
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class PolylineGeneratorDistances {
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public:
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PolylineGeneratorDistances(double clipStart_, double clipEnd_, double total_)
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: clipStart(clipStart_),
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clipEnd(clipEnd_),
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total(total_) {}
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// Scale line distance from tile units to [0, 2^15).
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double scaleToMaxLineDistance(double tileDistance) const;
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private:
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double clipStart;
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double clipEnd;
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double total;
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};
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struct PolylineGeneratorOptions {
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FeatureType type{FeatureType::LineString};
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style::LineJoinType joinType{style::LineJoinType::Miter};
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float miterLimit{2.f};
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style::LineCapType beginCap{style::LineCapType::Butt};
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style::LineCapType endCap{style::LineCapType::Butt};
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float roundLimit{1.f};
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uint32_t overscaling{1};
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std::optional<PolylineGeneratorDistances> clipDistances;
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};
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template <class PolylineLayoutVertex, class PolylineSegment>
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class PolylineGenerator {
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public:
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using Vertices = gfx::VertexVector<PolylineLayoutVertex>;
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using Segments = std::vector<PolylineSegment>;
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using LayoutVertexFunc = std::function<PolylineLayoutVertex(
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Point<int16_t> p, Point<double> e, bool round, bool up, int8_t dir, int32_t linesofar /*= 0*/)>;
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using CreateSegmentFunc = std::function<PolylineSegment(std::size_t vertexOffset, std::size_t indexOffset)>;
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using GetSegmentFunc = std::function<mln::SegmentBase&(PolylineSegment& segment)>;
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using Indexes = gfx::IndexVector<gfx::Triangles>;
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public:
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PolylineGenerator(Vertices& polylineVertices,
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LayoutVertexFunc layoutVertexFunc,
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Segments& polylineSegments,
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CreateSegmentFunc createSegmentFunc,
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GetSegmentFunc getSegmentFunc,
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Indexes& polylineIndexes);
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~PolylineGenerator() = default;
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void generate(const GeometryCoordinates& coordinates, const PolylineGeneratorOptions& options);
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private:
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struct TriangleElement;
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void addCurrentVertex(const GeometryCoordinate& currentCoordinate,
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double& distance,
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const Point<double>& normal,
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double endLeft,
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double endRight,
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bool round,
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std::size_t startVertex,
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std::vector<TriangleElement>& triangleStore,
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std::optional<PolylineGeneratorDistances> lineDistances);
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void addPieSliceVertex(const GeometryCoordinate& currentVertex,
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double distance,
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const Point<double>& extrude,
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bool lineTurnsLeft,
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std::size_t startVertex,
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std::vector<TriangleElement>& triangleStore,
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std::optional<PolylineGeneratorDistances> lineDistances);
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private:
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Vertices& vertices;
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LayoutVertexFunc layoutVertex;
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Segments& segments;
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CreateSegmentFunc createSegment;
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GetSegmentFunc getSegment;
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Indexes& indexes;
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std::ptrdiff_t e1;
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std::ptrdiff_t e2;
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std::ptrdiff_t e3;
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};
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} // namespace gfx
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} // namespace mln
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