pulp::view::CssEasing Struct Reference

CSS easing function — maps a normalized progress t ∈ [0,1] to an eased progress p ∈ [0,1]. More...

#include <css_animation.hpp>

Public Types
enum class	Kind {   linear , ease , ease_in , ease_out ,   ease_in_out , cubic_bezier , steps_start , steps_end }

Public Member Functions
float	at (float t) const
	Evaluate the easing at progress t ∈ [0,1].

Static Public Member Functions
static float	cubic_bezier_y (float x, float p1x, float p1y, float p2x, float p2y)
	Evaluate a CSS cubic-bezier(p1x, p1y, p2x, p2y) at progress x.
static CssEasing	from_keyword (const std::string &s)
	Parse a CSS easing keyword. Unrecognized → linear.

Public Attributes
Kind	kind = Kind::ease
	CSS spec — transition-timing-function defaults to ease, NOT linear.
float	p1x = 0.25f
	Cubic-bezier control points.
float	p1y = 0.1f
float	p2x = 0.25f
float	p2y = 1.0f
int	steps_count = 1

Detailed Description

CSS easing function — maps a normalized progress t ∈ [0,1] to an eased progress p ∈ [0,1].

Pulp follows the CSS Animations Module Level 1 vocabulary; advanced spec values (steps(), cubic-bezier) are parsed into structured forms below and evaluated here.

Member Enumeration Documentation

Kind

enum class pulp::view::CssEasing::Kind

strong

Enumerator
linear
ease
ease_in
ease_out
ease_in_out
cubic_bezier
steps_start
steps_end

Member Function Documentation

at()

float pulp::view::CssEasing::at ( float t ) const

inline

Evaluate the easing at progress t ∈ [0,1].

cubic_bezier_y()

float pulp::view::CssEasing::cubic_bezier_y ( float x, float p1x, float p1y, float p2x, float p2y )

inlinestatic

Evaluate a CSS cubic-bezier(p1x, p1y, p2x, p2y) at progress x.

Newton-Raphson solve for x(u) → u, then evaluate y(u). 6 iterations is plenty for 1/255 precision.

from_keyword()

CssEasing pulp::view::CssEasing::from_keyword ( const std::string & s )

inlinestatic

Parse a CSS easing keyword. Unrecognized → linear.

Member Data Documentation

kind

Kind pulp::view::CssEasing::kind = Kind::ease

CSS spec — transition-timing-function defaults to ease, NOT linear.

Default-constructed CssEasing matches the spec so declarations like transition: opacity 200ms (no explicit timing token) animate with the right curve out of the box.

p1x

float pulp::view::CssEasing::p1x = 0.25f

Cubic-bezier control points.

Default initializes to the ease curve (cubic-bezier(0.25, 0.1, 0.25, 1)) so the matrix view of kind and the explicit control-point view stay coherent.

p1y

float pulp::view::CssEasing::p1y = 0.1f

p2x

float pulp::view::CssEasing::p2x = 0.25f

p2y

float pulp::view::CssEasing::p2y = 1.0f

steps_count

int pulp::view::CssEasing::steps_count = 1

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

• /home/runner/work/pulp/pulp/core/view/include/pulp/view/css_animation.hpp