Tickmarks Struct Reference

#include <genesis/utils/tools/tickmarks.hpp>

Detailed Description

Helper class to find "nice" tickmark intervals for creating scales and axes.

Definition at line 48 of file tickmarks.hpp.

Public Member Functions
	Tickmarks ()=default
	Tickmarks (Tickmarks &&)=default
	Tickmarks (Tickmarks const &)=default
	~Tickmarks ()=default
std::vector< LabeledTick >	linear_labels (double min, double max, size_t target_steps)
	Return a set of labels with relative positions between min and max, where the labels correspond to the linear_ticks() numbers. More...
std::vector< double >	linear_ticks (double min, double max, size_t target_steps)
	Calculate a set of ticks that linearily span from min to max in approximately target_steps many steps, where each tick sits on a "nice" number. More...
std::vector< LabeledTick >	logarithmic_labels (double min, double max, double base=10.0)
	Return a set of labels with relative positions between min and max, where the labels correspond to logarithmic ticks. More...
Tickmarks &	operator= (Tickmarks &&)=default
Tickmarks &	operator= (Tickmarks const &)=default

Static Public Member Functions
static double	step_size (double interval_size, size_t target_steps)
	Calculate a step size that fills the interval_size in approximately target_steps many steps. More...

Public Attributes
bool	include_max = true
	Should the provided max value be included in the resulting list of ticks or not. More...
bool	include_min = true
	Should the provided min value be included in the resulting list of ticks or not. More...
bool	overshoot_at_max = false
	Should the highest value in the resulting list of ticks be above the provided max value (true) or not (false). More...
double	relative_epsilon = std::numeric_limits<double>::epsilon()
	Relative epsilon used to exclude two tickmarks that are too close to each other. More...
bool	undershoot_at_min = false
	Should the lowest value in the resulting list of ticks be below the provided min value (true) or not (false). More...

Classes
struct	LabeledTick

Constructor & Destructor Documentation

Tickmarks() [1/3]

Tickmarks ( )

default

~Tickmarks()

~Tickmarks ( )

default

Tickmarks() [2/3]

Tickmarks ( Tickmarks const &  )

default

Tickmarks() [3/3]

Tickmarks ( Tickmarks &&  )

default

Member Function Documentation

linear_labels()

std::vector< Tickmarks::LabeledTick > linear_labels	(	double	min,
		double	max,
		size_t	target_steps
	)

Return a set of labels with relative positions between min and max, where the labels correspond to the linear_ticks() numbers.

This function is a convenience wrapper for linear_ticks(), that turns the tick positions into relative values, while keeping the actual tick value as a label. Relative position 0.0 corresponds to min, relative position 1.0 to max.

Definition at line 147 of file tickmarks.cpp.

linear_ticks()

std::vector< double > linear_ticks	(	double	min,
		double	max,
		size_t	target_steps
	)

Calculate a set of ticks that linearily span from min to max in approximately target_steps many steps, where each tick sits on a "nice" number.

See step_size() for what is meant by nice numbers.

Definition at line 83 of file tickmarks.cpp.

logarithmic_labels()

std::vector< Tickmarks::LabeledTick > logarithmic_labels	(	double	min,
		double	max,
		double	base = 10.0
	)

Return a set of labels with relative positions between min and max, where the labels correspond to logarithmic ticks.

This function is the equivalent of linear_labels(), but instead uses logarithmic scaling. Also, it inserts as many ticks as are needed to go up to max in powers of base, and thus has no target steps.

Example: Given min == 1.0, max == 350, with overshoot_at_max == false and include_max == true, the resulting vector contains entries with labels 1, 10, 100, 350.

Remark: There is no logarithmic equivalent for linear_ticks(), as those would simply be powers of base up to max.

Definition at line 162 of file tickmarks.cpp.

operator=() [1/2]

Tickmarks& operator= ( Tickmarks &&  )

default

operator=() [2/2]

Tickmarks& operator= ( Tickmarks const &  )

default

step_size()

double step_size ( double  interval_size, size_t  target_steps  )

static

Calculate a step size that fills the interval_size in approximately target_steps many steps.

The resulting step size is calculated to be a "nice" size, i.e. fits [ 1 | 2 | 5 ] * 10^n. Thus, exemplary nice step sizes are 0.01, 20 and 500.

Definition at line 47 of file tickmarks.cpp.

Member Data Documentation

include_max

bool include_max = true

Should the provided max value be included in the resulting list of ticks or not.

Definition at line 141 of file tickmarks.hpp.

include_min

bool include_min = true

Should the provided min value be included in the resulting list of ticks or not.

Definition at line 136 of file tickmarks.hpp.

overshoot_at_max

bool overshoot_at_max = false

Should the highest value in the resulting list of ticks be above the provided max value (true) or not (false).

Definition at line 153 of file tickmarks.hpp.

relative_epsilon

double relative_epsilon = std::numeric_limits<double>::epsilon()

Relative epsilon used to exclude two tickmarks that are too close to each other.

Definition at line 158 of file tickmarks.hpp.

undershoot_at_min

bool undershoot_at_min = false

Should the lowest value in the resulting list of ticks be below the provided min value (true) or not (false).

Definition at line 147 of file tickmarks.hpp.

---

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

• tickmarks.hpp
• tickmarks.cpp