ó X–Tc@sîdZddlZddd„Zddd„Zddd„Zddd„Zddd „Zddd „Zd dd „Zd d„Z dddej d„Z ddd„Z dd ddej d„Z dd„ddej d„ZdS(sa This module provides a set of built-in easings which can be used by any game. Additionally, custom easings can be built. An easing should be a function (or callable) which takes in a sprite, and a time delta which is normalized to [0,1], and returns the state of easing at that time. See the source code of this module for some example implementations. Built-in easings are stateless, so the same animation can be used many times or on many different objects. Custom easings do not have to be stateless. Visualizations of these easings are available at `http://easings.net `_ . iÿÿÿÿNggð?cs‡‡fd†}|S(s' Linearly increasing: f(x) = x csˆˆ|ˆS(N((tspritetdelta(tfinishtstart(s1/usr/lib/python2.7/site-packages/spyral/easing.pyt linear_easings((RRR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pytLinearscs‡‡fd†}|S(s@ Quadratically increasing, starts slower : f(x) = x ^ 2 csˆˆˆ||S(N((RR(RR(s1/usr/lib/python2.7/site-packages/spyral/easing.pytquadratic_easings((RRR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pyt QuadraticInscs‡‡fd†}|S(sC Quadratically increasing, starts faster : f(x) = 2x - x^2 csˆˆˆd|||S(Ng@((RR(RR(s1/usr/lib/python2.7/site-packages/spyral/easing.pytquadratic_out_easing's((RRR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pyt QuadraticOut#scs‡‡fd†}|S(sR Quadratically increasing, starts and ends slowly but fast in the middle. csX|d9}|dkr.ˆd||ˆˆS|d8}ˆ|d||dˆˆS(Niigà?((RR(RR(s1/usr/lib/python2.7/site-packages/spyral/easing.pytquadratic_in_out_easing0s    ((RRR ((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pytQuadraticInOut,scs‡‡fd†}|S(s= Cubically increasing, starts very slow : f(x) = x^3 csˆ|||ˆˆS(N((RR(RR(s1/usr/lib/python2.7/site-packages/spyral/easing.pytcubic_in_easing=s((RRR ((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pytCubicIn9scs‡‡fd†}|S(sE Cubically increasing, starts very fast : f(x) = 1 + (x-1)^3 cs&|d8}ˆ|||dˆˆS(Ngð?((RR(RR(s1/usr/lib/python2.7/site-packages/spyral/easing.pytcubic_out_easingFs ((RRR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pytCubicOutBsgš™™™™™¹?cs‡‡fd†}|S(s\ Cubically increasing, starts and ends very slowly but very fast in the middle. cs`|d9}|dkr2ˆd|||ˆˆS|d8}dd|||ˆˆdˆS(Ng@gð?gà?((RR(RR(s1/usr/lib/python2.7/site-packages/spyral/easing.pytcubic_in_out_easingQs   ((RRR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pyt CubicInOutLsics‡‡fd†}|S(s  Iterate over a list of items. This particular easing is very useful for creating image animations, e.g.:: walk_images = [spyral.Image('f1.png'), spyral.Image('f2.png'), spyral.Image('f3.png')] walking_animation = Animation('image', easing.Iterate(walk_images), 2.0, loop=True) my_sprite.animate(walking_animation) :param list items: A list of items (e.g., a list of :class:`Images `). :param int times: The number of times to iterate through the list. cs2t|tˆƒˆƒ}ˆt|tˆƒƒS(N(troundtlentint(RRti(titemsttimes(s1/usr/lib/python2.7/site-packages/spyral/easing.pytiterate_easingis((RRR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pytIterate\s ig@cs‡‡fd†}|S(sc Depending on the arguments, moves at a different pace according to the sine function. cs$ˆtjˆ|dtjˆƒS(Ng@(tmathtsintpi(RR(t amplitudetphase(s1/usr/lib/python2.7/site-packages/spyral/easing.pyt sin_easingvs((RRt end_phaseR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pytSineqscs‡‡fd†}|S(sF Linearly increasing, but with two properites instead of one. cs:ˆdˆd|ˆdˆdˆd|ˆdfS(Nii((RR(RR(s1/usr/lib/python2.7/site-packages/spyral/easing.pyRs((RRR((RRs1/usr/lib/python2.7/site-packages/spyral/easing.pyt LinearTuple{sics‡‡‡‡fd†}|S(sF Increasing according to a circular curve for two properties. csBˆˆ|}ˆdˆtj|ƒˆdˆtj|ƒfS(Nii(RtcosR(RRttheta(tcentertradiust theta_endt theta_start(s1/usr/lib/python2.7/site-packages/spyral/easing.pyt arc_easing‰s((R%R&R(R'R)((R%R&R'R(s1/usr/lib/python2.7/site-packages/spyral/easing.pytArc…scCsdS(Ngð?((R$((s1/usr/lib/python2.7/site-packages/spyral/easing.pyt‘scs‡‡‡‡fd†}|S(sL Similar to an Arc, except the radius should be a function of time. csNˆˆ|}ˆdˆ|ƒtj|ƒˆdˆ|ƒtj|ƒfS(Nii(RR#R(RRR$(R%R&R'R((s1/usr/lib/python2.7/site-packages/spyral/easing.pyR)—s((R%R&R(R'R)((R%R&R'R(s1/usr/lib/python2.7/site-packages/spyral/easing.pytPolars(ii(ii(ii(ii(t__doc__RRRR R R RRRRR!R"R*R,(((s1/usr/lib/python2.7/site-packages/spyral/easing.pyt s