impeller::PathTessellator::Conic 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	cp
const Point	p2
const Scalar	weight

Detailed Description

Definition at line 98 of file path_tessellator.h.

Member Function Documentation

GetEndDirection()

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

inline

Definition at line 130 of file path_tessellator.h.

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

References cp, p1, and p2.

GetStartDirection()

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

inline

Definition at line 120 of file path_tessellator.h.

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

References cp, p1, and p2.

Last()

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

inline

Definition at line 104 of file path_tessellator.h.

{ return p2; }

References p2.

Solve()

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

inline

Definition at line 106 of file path_tessellator.h.

                                {
      Scalar u = 1.0f - t;
      Scalar coeff_1 = u * u;
      Scalar coeff_c = 2 * u * t * weight;
      Scalar coeff_2 = t * t;
 
      return (p1 * coeff_1 + cp * coeff_c + p2 * coeff_2) /
             (coeff_1 + coeff_c + coeff_2);
    }

References cp, p1, p2, and weight.

SubdivisionCount()

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

inline

Definition at line 116 of file path_tessellator.h.

                                                {
      return ComputeConicSubdivisions(scale, p1, cp, p2, weight);
    }

References impeller::ComputeConicSubdivisions(), cp, p1, p2, and weight.

Member Data Documentation

cp

const Point impeller::PathTessellator::Conic::cp

Definition at line 100 of file path_tessellator.h.

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

p1

const Point impeller::PathTessellator::Conic::p1

Definition at line 99 of file path_tessellator.h.

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

p2

const Point impeller::PathTessellator::Conic::p2

Definition at line 101 of file path_tessellator.h.

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

weight

const Scalar impeller::PathTessellator::Conic::weight

Definition at line 102 of file path_tessellator.h.

Referenced by Solve(), and SubdivisionCount().

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

• impeller/tessellator/path_tessellator.h