|
请使用QQ关联注册PLM之家,学习更多关于内容,更多精彩原创视频供你学习!
您需要 登录 才可以下载或查看,没有账号?注册
x
/ Q4 u& A1 Z: J& ^9 a7 ]
* W8 u; p2 A3 `% T
. ]0 g0 C; [" L7 Z, c动画库tween.js: h% L+ R$ L: i3 k/ ^
& e1 l \' S" x6 q( P6 J
相关资料 http://robertpenner.com/easing/' x0 ?8 Z- r/ i7 h' b: k0 z. A
) w: A) M2 l' U% l2 R
8 j* L& K- w2 P1 c+ n
Linear:无缓动效果;
0 }, x. |" Q4 b4 IQuadratic:二次方的缓动(t^2);
: ~2 W4 _; |& x0 hCubic:三次方的缓动(t^3);
9 G' V9 B! Q- ^9 R* O; K: ~Quartic:四次方的缓动(t^4);7 t9 g6 } e0 d' w) ~
Quintic:五次方的缓动(t^5);) [9 U% [, X$ Q% I- s3 g
Sinusoidal:正弦曲线的缓动(sin(t));
" D2 @- A( J- \/ wExponential:指数曲线的缓动(2^t);
( F9 N+ c) x ]+ \9 o DCircular:圆形曲线的缓动(sqrt(1-t^2));1 v7 ~, q" t; j. S! Z
Elastic:指数衰减的正弦曲线缓动;
+ W' @* G9 C0 X/ k) `Back:超过范围的三次方缓动((s+1)*t^3 - s*t^2);
/ a# R# u( {9 Z# Q, r. \) HBounce:指数衰减的反弹缓动。9 w: c# [" Q& M7 ]- F
ps:以上都是自己的烂翻译,希望各位修正。
3 `0 o# [# e2 I8 g! g8 F( B4 G7 u7 A
每个效果都分三个缓动方式(方法),分别是:
2 W) C# I! L) D" H" H2 C) f1 deaseIn:从0开始加速的缓动;
. @5 V! [3 s# beaseOut:减速到0的缓动;
& X9 `' O! T- b: z1 @! l* [1 geaseInOut:前半段从0开始加速,后半段减速到0的缓动。9 G% I$ o+ j! t3 e# l5 i' y
其中Linear是无缓动效果,没有以上效果。* h$ Q6 A- j0 i5 b, H9 f
9 W; O( _$ h% G% G- k, w; p9 q. @. D
" k2 G" i S. a! b- H. S这是as代码,四个参数分别是:9 X, U: D( F/ j9 ]4 ?( C
t: current time(当前时间);- U$ z4 L9 n. j3 V5 Z
b: beginning value(初始值);
) q3 \ I- ^0 lc: change in value(变化量);7 Y5 _1 `( H9 S. y* g
d: duration(持续时间)。
; Y( W' ?3 s, w9 z2 |ps:Elastic和Back有其他可选参数,里面都有说明。
1 y9 Z/ Z* Q, D, a
4 M7 z4 D( Z4 D3 }那如何在js中利用这些算法呢?可以看到,虽然是as代码,但里面的程序是可以直接放在js里使用的。
+ p0 N$ `& |) Q# O0 v5 i, `我们可以定义一个类,把它这部分放在里面:: A' l. S* t7 n& o; S5 z" O
0 Z5 @% F7 n2 X+ Y6 L
! D4 |. O3 H7 i0 T" ^% D
7 P/ i& V1 G$ V' l0 u9 G1 C[mw_shl_code=javascript,true]var Tween = {
{; k' _: K# V: G$ H1 o Linear: function(t,b,c,d){ return c*t/d + b; },
' Q; U4 z! n1 H+ v* X: _2 G$ x9 [8 t+ f Quad: {
- {/ j8 M+ @( _+ j% w easeIn: function(t,b,c,d){+ _% r$ r# _6 v0 Y3 p
return c*(t/=d)*t + b;4 H: ?3 h) Z- Y' G( j O
},. m5 j) S: q" `" u3 @3 J
easeOut: function(t,b,c,d){( _ I' T$ {! w
return -c *(t/=d)*(t-2) + b;
& J% o% v' B |4 S! Q- q$ w! {: h },' I7 H/ `7 N" \
easeInOut: function(t,b,c,d){
: M6 l% v$ F6 Q- f0 ~4 X if ((t/=d/2) < 1) return c/2*t*t + b;/ L" u# D C- O
return -c/2 * ((--t)*(t-2) - 1) + b;5 h( T9 U5 t5 s) L3 X
}* j* {; K+ o- |4 C9 ^- I
},
" i- {. u/ Z' W1 e Cubic: {" U( Q ~) C" y0 \3 `
easeIn: function(t,b,c,d){
, {& Z. z6 E/ T" d- ~! J8 { return c*(t/=d)*t*t + b;
' X9 s/ n* Z% E6 |, } },
- A2 ~* D* ]' M& H5 R easeOut: function(t,b,c,d){
+ J. `% Z: ~( n) n2 }1 V return c*((t=t/d-1)*t*t + 1) + b;
2 e* v8 V8 Q7 T },
7 }* T5 i6 V/ v5 p easeInOut: function(t,b,c,d){) a' k' j% N8 f
if ((t/=d/2) < 1) return c/2*t*t*t + b;
+ u0 y2 u7 g. c$ V }6 p! @, @ return c/2*((t-=2)*t*t + 2) + b;. ~ o$ y+ K0 a) y& ?0 O! V
}
- l" c* j" j {& { },8 s- a6 _5 r, j x# W
Quart: {
1 D. I, Y7 r+ I6 V$ b easeIn: function(t,b,c,d){
$ h$ G6 j m9 m, Y+ U$ K' E return c*(t/=d)*t*t*t + b;4 Q9 y- {5 _% ~- G1 s
},
; [! d1 c6 F4 }' H4 w% r6 { easeOut: function(t,b,c,d){
# p0 v0 o y* E: P9 a, r1 \ return -c * ((t=t/d-1)*t*t*t - 1) + b;
3 q+ @# y; m4 d8 M% c7 N1 C% { },
0 P8 R& s j+ z( [ r- a/ M2 ?& L easeInOut: function(t,b,c,d){( ]% J' F" t: r- e
if ((t/=d/2) < 1) return c/2*t*t*t*t + b;
1 w! I1 k* m& L# X return -c/2 * ((t-=2)*t*t*t - 2) + b;
4 V1 ^' G6 t: k$ t. K: @9 ^* S: v }
8 l, ^- V s( Z! B' T },6 k" {7 _. `( n5 ?
Quint: {7 N+ Q: ~# ?+ \2 B( \
easeIn: function(t,b,c,d){; i) r& o; J* T, Q
return c*(t/=d)*t*t*t*t + b;
( B, B+ F7 q: \, y' b$ O0 F& q) D. W },
- A: p5 N2 {/ u0 `9 _" k easeOut: function(t,b,c,d){
9 s! z/ i- N6 d% c. i return c*((t=t/d-1)*t*t*t*t + 1) + b;
0 E4 z3 ~" {8 M },& b3 G, }- T: n: j- ^
easeInOut: function(t,b,c,d){) b: v) U! U' W/ ~" ^" P% c8 a
if ((t/=d/2) < 1) return c/2*t*t*t*t*t + b;
8 s7 a) S8 H1 ~ return c/2*((t-=2)*t*t*t*t + 2) + b;
0 H7 E7 w2 r: {9 E }: f& e% y4 z, D$ O
},% N; k& o! q3 ?/ L
Sine: {# ]+ m" e; ~' [& f
easeIn: function(t,b,c,d){- v5 I! S; j+ h
return -c * Math.cos(t/d * (Math.PI/2)) + c + b;
% J: d5 @- c. p( A9 V$ y0 j, P6 U },9 f* n& Q) v2 Y( P2 e1 D4 J& t
easeOut: function(t,b,c,d){$ ^# t {! e- e9 v. G# Z
return c * Math.sin(t/d * (Math.PI/2)) + b;9 Y P* G" W* g
},
: z9 |: A$ y( A7 Y easeInOut: function(t,b,c,d){7 s$ p( [+ o) r: \. d1 ~
return -c/2 * (Math.cos(Math.PI*t/d) - 1) + b;2 c5 l, d4 d/ s/ @! o" [
}( l9 U3 |( v6 V; b! ]
},
9 \' ^+ U, C0 M5 B Expo: {
s6 B- K8 h0 |" }6 \ easeIn: function(t,b,c,d){
* j1 E+ U$ d" p) t8 t1 g' i+ [: Y return (t==0) ? b : c * Math.pow(2, 10 * (t/d - 1)) + b;# S b. P5 D) X+ N
},
3 n2 j7 b. T$ Q1 W easeOut: function(t,b,c,d){
4 D1 F" }% x- a& o return (t==d) ? b+c : c * (-Math.pow(2, -10 * t/d) + 1) + b;" ?# o6 |. f3 e# \
},0 J, b- O0 z- ]9 o: Y1 D
easeInOut: function(t,b,c,d){
# {5 K J4 t2 c. _( q) M1 X5 } if (t==0) return b;* {3 S0 J( g4 t8 Q
if (t==d) return b+c;7 q+ w5 v* C3 d, b: l
if ((t/=d/2) < 1) return c/2 * Math.pow(2, 10 * (t - 1)) + b;
5 P9 Q, Q; h! ?4 w0 N& Z return c/2 * (-Math.pow(2, -10 * --t) + 2) + b;/ X# V& j4 Q2 h3 y1 v. A
}
/ x: q6 [3 f% ]; s },
! {) F4 ?% x& N1 w Circ: {/ s/ V' o+ `. p( N# q& t) X
easeIn: function(t,b,c,d){
% B5 [0 T2 e9 {5 J( m- F, E return -c * (Math.sqrt(1 - (t/=d)*t) - 1) + b;' Y# k' [; r, H; y+ A3 i
},
. ?' t: L! n! h6 P8 e. G8 H easeOut: function(t,b,c,d){/ v5 J2 X9 @! T5 ]) q% `. W/ U
return c * Math.sqrt(1 - (t=t/d-1)*t) + b;5 `0 l! P9 T. A8 c. U
},( D6 r1 ~8 y3 K/ {- o/ W
easeInOut: function(t,b,c,d){, ^ ~2 I, M3 L- ?
if ((t/=d/2) < 1) return -c/2 * (Math.sqrt(1 - t*t) - 1) + b;
9 c0 A( K z3 z* L( U9 r return c/2 * (Math.sqrt(1 - (t-=2)*t) + 1) + b;
! Q& ?# X- `$ L' h }
( K+ y8 u8 M& _. |# ] },% U& M, y9 j- f
Elastic: {
; P* P1 g& i) p0 t% `9 A easeIn: function(t,b,c,d,a,p){; M# r$ p" r1 i3 r/ b1 C' ?
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
0 L' e i0 o3 v, ]& J/ V! i$ z if (!a || a < Math.abs(c)) { a=c; var s=p/4; }( f% F) b/ X0 J* {2 q" [9 f5 w
else var s = p/(2*Math.PI) * Math.asin (c/a);
. e% l$ Q! G/ L' t ] return -(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b; r+ Q+ l+ a$ u9 a/ C7 L
},
# b8 f) X, q- G5 X easeOut: function(t,b,c,d,a,p){- W& X0 g% w2 C2 A5 X. I& X
if (t==0) return b; if ((t/=d)==1) return b+c; if (!p) p=d*.3;
1 h; Z0 }3 w1 a/ W M if (!a || a < Math.abs(c)) { a=c; var s=p/4; }
# O+ O. @8 h- Z6 j+ Q& }% ^! Z3 X7 \ else var s = p/(2*Math.PI) * Math.asin (c/a);
3 k2 A) L8 t. ]' P return (a*Math.pow(2,-10*t) * Math.sin( (t*d-s)*(2*Math.PI)/p ) + c + b);
]7 M& g' D Y$ W4 R },
/ L/ l, A! Q3 R4 ] easeInOut: function(t,b,c,d,a,p){# w w8 F5 e) x$ o8 U, B$ _
if (t==0) return b; if ((t/=d/2)==2) return b+c; if (!p) p=d*(.3*1.5);
- o# R+ F& c- s if (!a || a < Math.abs(c)) { a=c; var s=p/4; }* Z! c5 Z1 k/ S
else var s = p/(2*Math.PI) * Math.asin (c/a);8 @6 m: E0 _: A6 M, v, ]1 a) ^, r9 G; b
if (t < 1) return -.5*(a*Math.pow(2,10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )) + b;4 m( ?' a7 S; J/ _% {" ?$ A
return a*Math.pow(2,-10*(t-=1)) * Math.sin( (t*d-s)*(2*Math.PI)/p )*.5 + c + b;
- }1 S6 _ K! }* ]$ K }
$ W; ?5 m, Q% F4 z },* ]) K0 p: x8 _6 S7 j/ S
Back: {
0 p3 D. ?# D" n$ u! v: l/ V& D easeIn: function(t,b,c,d,s){* I+ ]/ i: A" i1 `. u2 E# ?
if (s == undefined) s = 1.70158;% j+ y- X9 d- U O+ F$ J
return c*(t/=d)*t*((s+1)*t - s) + b;/ z) x1 z: p! r. l! W( N8 e7 c4 [
},6 R7 |9 D1 I, _( C# j- _4 Z
easeOut: function(t,b,c,d,s){
% X6 g; Y! j$ Q- w$ w if (s == undefined) s = 1.70158;8 M D o8 j& X X. Q2 E! ^' W$ p/ m# h# d
return c*((t=t/d-1)*t*((s+1)*t + s) + 1) + b;; O2 V& `, ~, k% D. d
},
# g6 v; `5 ^; D easeInOut: function(t,b,c,d,s){
' \ b# \/ x( E* z5 l; P6 C if (s == undefined) s = 1.70158;
2 L: h' @- U! I: {- u1 B if ((t/=d/2) < 1) return c/2*(t*t*(((s*=(1.525))+1)*t - s)) + b;! p {* q' E; [
return c/2*((t-=2)*t*(((s*=(1.525))+1)*t + s) + 2) + b;
" w) @: y/ p5 @; |/ Q }
# B5 o* Y' Q' Z; E! S },
W% Y! w. e) P! B6 |. c; O+ B Bounce: {8 k" c. T$ d4 ^3 d
easeIn: function(t,b,c,d){- T& U( X( f0 k) V8 R5 a
return c - Tween.Bounce.easeOut(d-t, 0, c, d) + b;5 ~! T- I& L X* H4 D
},7 S3 U# c3 s6 ?* E
easeOut: function(t,b,c,d){9 W' p: j# L! V7 V4 m8 h4 n
if ((t/=d) < (1/2.75)) {
5 z c/ E/ O0 o! X3 U8 s! S4 r return c*(7.5625*t*t) + b;$ {9 f& O( s/ X$ K! _
} else if (t < (2/2.75)) {
a5 T+ |! m/ `4 q% } return c*(7.5625*(t-=(1.5/2.75))*t + .75) + b;5 u1 h2 Q7 U' M- Q# {/ L$ L$ ~* M+ a
} else if (t < (2.5/2.75)) {1 G9 t: u9 E. G
return c*(7.5625*(t-=(2.25/2.75))*t + .9375) + b;
+ ?* @3 U2 }' E" V1 W5 n } else {
6 a4 o( _$ m% ?" I return c*(7.5625*(t-=(2.625/2.75))*t + .984375) + b;4 z/ L8 }0 l8 G! i& D3 K
}
. S! R7 A# ~2 ]2 p! ^ },
- y/ `1 O9 \/ n% s$ ~: Q) b. f0 c; ] easeInOut: function(t,b,c,d){) U6 u) t4 z6 J- u
if (t < d/2) return Tween.Bounce.easeIn(t*2, 0, c, d) * .5 + b;
" B* f8 r' Q" v2 t1 b& k else return Tween.Bounce.easeOut(t*2-d, 0, c, d) * .5 + c*.5 + b;/ X7 n( b: F* d+ B% u; Y" p
}
1 K) {% ?- X# k g! Z }
2 M$ E, d( p- J7 p}[/mw_shl_code]9 n: E- ]6 e% V
|
|