impeller::PathTessellator::Cubic Struct Reference

#include <path_tessellator.h>

Public Member Functions
Point	Last () const
Point	Solve (Scalar t) const
Scalar	SubdivisionCount (Scalar scale) const
std::optional< Vector2 >	GetStartDirection () const
std::optional< Vector2 >	GetEndDirection () const

Public Attributes
const Point	p1
const Point	cp1
const Point	cp2
const Point	p2

Detailed Description

Definition at line 141 of file path_tessellator.h.

Member Function Documentation

GetEndDirection()

std::optional< Vector2 > impeller::PathTessellator::Cubic::GetEndDirection ( ) const

inline

Definition at line 174 of file path_tessellator.h.

                                                 {
      if (p2 != cp2) {
        return (p2 - cp2).Normalize();
      }
      if (p2 != cp1) {
        return (p2 - cp1).Normalize();
      }
      if (p2 != p1) {
        return (p2 - p1).Normalize();
      }
      return std::nullopt;
    }

References cp1, cp2, p1, and p2.

GetStartDirection()

std::optional< Vector2 > impeller::PathTessellator::Cubic::GetStartDirection ( ) const

inline

Definition at line 161 of file path_tessellator.h.

                                                   {
      if (p1 != cp1) {
        return (p1 - cp1).Normalize();
      }
      if (p1 != cp2) {
        return (p1 - cp2).Normalize();
      }
      if (p1 != p2) {
        return (p1 - p2).Normalize();
      }
      return std::nullopt;
    }

References cp1, cp2, p1, and p2.

Last()

Point impeller::PathTessellator::Cubic::Last ( ) const

inline

Definition at line 147 of file path_tessellator.h.

{ return p2; }

References p2.

Solve()

Point impeller::PathTessellator::Cubic::Solve ( Scalar  t ) const

inline

Definition at line 149 of file path_tessellator.h.

                                {
      Scalar u = 1.0f - t;
      return p1 * u * u * u +       //
             3 * cp1 * u * u * t +  //
             3 * cp2 * u * t * t +  //
             p2 * t * t * t;
    }

References cp1, cp2, p1, and p2.

SubdivisionCount()

Scalar impeller::PathTessellator::Cubic::SubdivisionCount ( Scalar  scale ) const

inline

Definition at line 157 of file path_tessellator.h.

                                                {
      return ComputeCubicSubdivisions(scale, p1, cp1, cp2, p2);
    }

References impeller::ComputeCubicSubdivisions(), cp1, cp2, p1, and p2.

Member Data Documentation

cp1

const Point impeller::PathTessellator::Cubic::cp1

Definition at line 143 of file path_tessellator.h.

Referenced by GetEndDirection(), GetStartDirection(), Solve(), and SubdivisionCount().

cp2

const Point impeller::PathTessellator::Cubic::cp2

Definition at line 144 of file path_tessellator.h.

Referenced by GetEndDirection(), GetStartDirection(), Solve(), and SubdivisionCount().

p1

const Point impeller::PathTessellator::Cubic::p1

Definition at line 142 of file path_tessellator.h.

Referenced by GetEndDirection(), GetStartDirection(), Solve(), and SubdivisionCount().

p2

const Point impeller::PathTessellator::Cubic::p2

Definition at line 145 of file path_tessellator.h.

Referenced by GetEndDirection(), GetStartDirection(), Last(), Solve(), and SubdivisionCount().

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The documentation for this struct was generated from the following file:

• impeller/tessellator/path_tessellator.h