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#pragma once
#include "drape/drape_global.hpp"
#include "drape/glsl_types.hpp"
#include "geometry/rect2d.hpp"
#include "std/vector.hpp"
namespace df
{
enum EPointType
{
StartPoint = 0,
EndPoint = 1,
PointsCount = 2
};
enum ENormalType
{
StartNormal = 0,
EndNormal = 1,
BaseNormal = 2
};
struct LineSegment
{
glsl::vec2 m_points[PointsCount];
glsl::vec2 m_tangent;
glsl::vec2 m_leftBaseNormal;
glsl::vec2 m_leftNormals[PointsCount];
glsl::vec2 m_rightBaseNormal;
glsl::vec2 m_rightNormals[PointsCount];
glsl::vec2 m_leftWidthScalar[PointsCount];
glsl::vec2 m_rightWidthScalar[PointsCount];
bool m_hasLeftJoin[PointsCount];
bool m_generateJoin;
LineSegment(glsl::vec2 const & p1, glsl::vec2 const & p2)
{
m_points[StartPoint] = p1;
m_points[EndPoint] = p2;
m_leftWidthScalar[StartPoint] = m_leftWidthScalar[EndPoint] = glsl::vec2(1.0f, 0.0f);
m_rightWidthScalar[StartPoint] = m_rightWidthScalar[EndPoint] = glsl::vec2(1.0f, 0.0f);
m_hasLeftJoin[StartPoint] = m_hasLeftJoin[EndPoint] = true;
m_generateJoin = true;
}
};
void CalculateTangentAndNormals(glsl::vec2 const & pt0, glsl::vec2 const & pt1,
glsl::vec2 & tangent, glsl::vec2 & leftNormal,
glsl::vec2 & rightNormal);
void ConstructLineSegments(vector<m2::PointD> const & path, vector<LineSegment> & segments);
void UpdateNormals(LineSegment * segment, LineSegment * prevSegment, LineSegment * nextSegment);
void GenerateJoinNormals(dp::LineJoin joinType, glsl::vec2 const & normal1, glsl::vec2 const & normal2,
float halfWidth, bool isLeft, float widthScalar, vector<glsl::vec2> & normals,
vector<glsl::vec2> * uv = nullptr);
void GenerateCapNormals(dp::LineCap capType, glsl::vec2 const & normal1, glsl::vec2 const & normal2,
glsl::vec2 const & direction, float halfWidth, bool isStart, vector<glsl::vec2> & normals,
int segmentsCount = 8);
glsl::vec2 GetNormal(LineSegment const & segment, bool isLeft, ENormalType normalType);
float GetProjectionLength(glsl::vec2 const & newPoint, glsl::vec2 const & startPoint, glsl::vec2 const & endPoint);
} // namespace df
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