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3 u7 J, j, H J) b1 P- ?/ Q这些天想了想怎么给LCD做丝滑的动画,稍微想了想,便有了下面这些代码。
7 c) e, c( v$ k, U- importPackage (java.lang);! f2 I2 m. e2 I0 t6 K
- importPackage (java.awt);
1 q) T# m+ q. S& B9 C
! F) W; I" Z. w- include(Resources.id("mtrsteamloco:library/code/face.js"));& A# q% r3 A) R1 l4 e& A. a
- * J0 h+ k2 ^5 w! O( Q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ P* Q+ F; @# U& c- l - - e4 |/ E6 G, }- L
- function getW(str, font) {2 O) ?) p* [ g# z; m; U! ^; N
- let frc = Resources.getFontRenderContext();9 L# t9 ]7 [6 R* x; o( f
- bounds = font.getStringBounds(str, frc);
/ A- ]* D: K: _; Y- D6 f- X - return Math.ceil(bounds.getWidth());
5 [6 \( N- W# G1 P) O2 _) U - }
- u8 e& B: d$ r# N0 l- C - * ^7 X# A6 ?; R& E! G
- da = (g) => {//底图绘制
0 M, S" B: f5 T" e F( x! ~. [ - g.setColor(Color.BLACK);
4 W. ]. j- T1 h1 i2 g8 r1 u: x - g.fillRect(0, 0, 400, 400);1 |; i. w8 ~: c0 r9 f: f: H
- }
I! D% ?! J6 n$ f% X) T! ?" _
$ |) _% }2 O1 `1 v0 K0 R+ L- db = (g) => {//上层绘制, C6 \/ }' p* V/ C3 _ g1 \2 u- J
- g.setColor(Color.WHITE);
: g# M% K% c7 t0 Z# ^& u( c% V% Z - g.fillRect(0, 0, 400, 400);/ o2 I3 H7 K% t8 j, T- ^
- g.setColor(Color.RED);
6 U" w( i: \; J - g.setFont(font0);
B* S% O7 E4 I0 {9 | - let str = "晴纱是男娘";9 H0 }# P. X# h W1 i5 P% Q; y5 s
- let ww = 400;. f3 F7 c& f7 N. u8 g- I( W
- let w = getW(str, font0);2 }6 g0 d' a" J( G4 ]; m
- g.drawString(str, ww / 2 - w / 2, 200);- y2 e* @. @: |3 T2 Y, u( m7 f
- }# r! y- d( V/ P- Y* R V# }' U
- " {# |. m: C0 o9 [$ q w
- const mat = new Matrices();: _ n; F3 x1 P) E X
- mat.translate(0, 0.5, 0);
- D- F0 U8 g) J" W
6 t7 }- P7 a1 v4 l4 L9 S0 Q8 B2 [- function create(ctx, state, entity) {
: K+ W0 v0 H& C* n0 a6 a) K - let info = {
0 s3 k) ~" L* Y7 A( N - ctx: ctx,
* u- T6 K6 u+ E. M% w+ k" ? - isTrain: false,7 `8 Y" s$ n/ J( v0 j- J, z
- matrices: [mat],, u8 }1 _7 S! _ c& q6 ]
- texture: [400, 400],; ]8 H, M/ E8 H! e% k6 Z# P
- model: {5 ]4 I. u/ ^! P J9 I$ J% j$ [
- renderType: "light",
! u& P% _; S$ E- l0 A) Y( v - size: [1, 1],# a1 F2 r8 W9 o4 s
- uvSize: [1, 1]# D- m# z7 k3 }" _/ d
- }
+ s n/ d f* p* G8 e- C - }
) }2 e; t7 f# K C( V2 } - let f = new Face(info);8 Q0 ]+ i( y1 {" F3 o
- state.f = f;+ _6 U( L1 b! b1 M) _) {. ]
- + A* l) d/ R3 h$ J, K# h5 A+ ~ h
- let t = f.texture;
- q( z) Y; K9 k0 | - let g = t.graphics;! R9 a6 z5 Q1 l' V6 S
- state.running = true;0 J- b, ] B! n/ J' b
- let fps = 24;8 e; B# W* @8 [2 t
- da(g);//绘制底图' ?- J9 s! H. ~" J4 `: X
- t.upload();
0 j: u6 `4 I& p } - let k = 0;" J' f' l" F5 S1 D# Z
- let ti = Date.now();- U. Q; O: i' f/ w8 U! @
- let rt = 0;
- s6 c5 B- [4 h' L& r5 X5 _ - smooth = (k, v) => {// 平滑变化
. ^. q0 @9 Q/ x1 ?$ D2 b$ [ - if (v > k) return k;
5 W2 C/ { {9 @: M. X+ @ - if (k < 0) return 0;
* D" z" X& n9 V2 H' {( y+ j6 P - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- J4 H& Y8 C$ U7 b8 f( ^7 N - }
. D3 P: P9 `+ P. z4 N0 R - run = () => {// 新线程2 H, n$ @+ _' X2 {7 s/ v0 q- @0 z
- let id = Thread.currentThread().getId();4 W7 Q# H& @; x# \0 y$ r
- print("Thread start:" + id);0 m# P c- [6 J0 k O( ]* l& a
- while (state.running) {$ a. Q( {( E4 R, q
- try {
- x, q7 c& Q( d# L: x$ S9 }% } - k += (Date.now() - ti) / 1000 * 0.2;! R& a- ]) C2 n3 g
- ti = Date.now();, R5 j+ I* f/ x! Z) ]. q- G
- if (k > 1.5) {
m+ e* _! Q5 R - k = 0;- j6 ?( L9 Y" ^3 u
- }% L7 m g+ M, g" @" \
- setComp(g, 1);+ _! T0 c" ^0 d7 t( F
- da(g);0 m; k3 ^1 m& j! Y, |, r
- let kk = smooth(1, k);//平滑切换透明度) B j1 K9 |8 W$ h' E$ O" n
- setComp(g, kk);! D/ I4 Q9 A$ K' a7 T3 @
- db(g);
4 N1 q6 d7 m1 V/ P6 X/ T0 E - t.upload();
1 s8 a4 {5 u7 v3 E. P7 G! F - ctx.setDebugInfo("rt" ,Date.now() - ti);" `$ }& ~/ h: B8 Q6 o! N/ Y
- ctx.setDebugInfo("k", k);
) J- _! a' {" e7 D4 V7 t - ctx.setDebugInfo("sm", kk);
0 B' }9 Q: n+ |- ]6 R - rt = Date.now() - ti;) V- P% o+ ^% l, S% U. o/ S
- Thread.sleep(ck(rt - 1000 / fps));
- a9 x9 m& Y3 n& b1 z- }6 V. q - ctx.setDebugInfo("error", 0)% i6 j |. O1 w
- } catch (e) {* O2 r* P% b% Y+ M9 n# `1 i X
- ctx.setDebugInfo("error", e);& C1 l' t& q9 ]# p
- }- @6 R+ g; u: m0 g6 }/ t
- }
. _/ R* n& t" F! C0 U5 o! ^4 J - print("Thread end:" + id);
! k" p8 z/ f4 j B9 L - }
/ F/ j2 R( A+ j# n$ n5 z - let th = new Thread(run, "qiehuan");
8 s8 \2 Q/ {5 D. w5 X9 k9 y' w - th.start();
- c* p- ?+ E+ N. ~7 @$ {) L - }3 D4 o! J# C2 d4 [
. U8 J1 G Z+ g) B. L) y- function render(ctx, state, entity) {
3 v% _' h( A, o0 c# S* j$ x - state.f.tick();- x+ G k; q* q) C L5 h0 r
- }+ @; F! ?' ]' k' t
- C8 v# y) Y. z9 Z; f) u4 I
- function dispose(ctx, state, entity) {* Z, v3 q. d; D5 S
- print("Dispose");3 z# f! M Y9 m6 U7 X' u" [
- state.running = false;
! ^4 H1 u/ A, W9 g8 z- X - state.f.close();
" F `8 e9 B: u' q+ b - }
+ P" j4 M5 A5 k* \ - 7 e9 N" v/ }2 Q
- function setComp(g, value) {
/ V. h4 g b" J, K- H: [# {! S - g.setComposite(AlphaComposite.SrcOver.derive(value));& }5 u+ ]0 S' X. ?) i4 k# {
- }
复制代码
* E( I+ m5 d- v; z9 s! z9 [写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。* U8 ?. i' l" r) j- I' P3 n
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6 |$ S3 X6 k6 h9 V! h+ B4 ]顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 ~; C" Y7 H8 C7 c; i
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