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8 y. w0 k( W* _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。 F2 I, W2 x, P; x
- importPackage (java.lang);
- v$ Q5 n% F! z. @) M7 v% _6 } - importPackage (java.awt);
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@3 z ~% S: g# C% N- include(Resources.id("mtrsteamloco:library/code/face.js"));2 t& L6 e! F0 D4 l2 @" E2 F
8 U4 Q3 S3 b( E# b9 S1 h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
# \$ m5 z8 F2 L/ f4 \ - % o3 I* W! l. [" R8 z' E
- function getW(str, font) {% P1 a. e, h7 O
- let frc = Resources.getFontRenderContext(); H0 p3 `- o# q: s' X. ^
- bounds = font.getStringBounds(str, frc);
% n: R, Y! C0 ^* f9 O/ S - return Math.ceil(bounds.getWidth());
5 Q% p& U2 s/ l1 }8 M - }
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- da = (g) => {//底图绘制7 ?. I$ w; K7 m+ |7 W
- g.setColor(Color.BLACK);
5 }% q+ o6 h& V! W - g.fillRect(0, 0, 400, 400);/ W" K' _, J+ g, c' ~5 o
- }; I6 W- r* ?/ u' K) l8 q
- $ i+ b& R& R! K; r; j" w: h! Q
- db = (g) => {//上层绘制( X9 k9 F, ]9 u E' G
- g.setColor(Color.WHITE);9 m4 ? a* l8 g6 r: o1 I7 a
- g.fillRect(0, 0, 400, 400);
9 u( E6 d5 Y0 p- S9 e - g.setColor(Color.RED);
/ ?4 p* ^$ W; r( G: K - g.setFont(font0);
1 I" G) C/ z1 [* M+ C- k& a - let str = "晴纱是男娘";/ ~! e3 ] Q7 ^8 c1 G, W4 w# c
- let ww = 400;
p' h! a6 `" m9 [" P' M - let w = getW(str, font0);
# F; f, f2 J6 u, N9 P - g.drawString(str, ww / 2 - w / 2, 200);
: o* ?2 D# o0 [2 }5 n - }
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- const mat = new Matrices();
: |) r, _- b7 e - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
% a( L* j$ B8 f3 n5 y& Y - let info = {
& r2 I, Z- D0 @% G# A5 A - ctx: ctx,
: A2 \( P/ ^5 P# d7 i# v8 q - isTrain: false,! i; |; a3 O- b5 E' ^& x
- matrices: [mat],
! ~8 I" ~9 X1 u8 W% S/ u( ` - texture: [400, 400],$ h5 b5 J$ c2 _) R7 T( e
- model: {1 {; s L) ^4 ~' q) z
- renderType: "light",
2 q* M; | G, R) }3 L - size: [1, 1],
- a8 K+ S- S! X; h2 T$ y$ `, U7 V - uvSize: [1, 1]# m- H: [ e$ t$ u: c( I8 i
- }
/ i7 r! x- @& r) V - }2 m; E" {2 m+ m0 ?8 ] C, |
- let f = new Face(info);
" R: }( X8 W1 M1 a3 s$ r - state.f = f;6 L/ I G5 i+ P* V, i6 p
- ! _9 Y+ D, v+ q6 M3 [& \: z1 f
- let t = f.texture; r+ N7 }: I7 c4 r9 T2 \
- let g = t.graphics;
, U7 _6 B$ b z0 A3 o - state.running = true;
, [: e7 y$ n6 M& v - let fps = 24;* C) w& Q8 a; P: @) O6 F7 n
- da(g);//绘制底图+ b2 J( }1 q- K) _
- t.upload();
% `5 J! e+ g, J' X$ M3 ], L; K$ x/ M - let k = 0;2 L; a, D- E$ x
- let ti = Date.now();; Z* ~. U3 t; F6 r
- let rt = 0; d* I% S) E4 E8 a' c
- smooth = (k, v) => {// 平滑变化
# W) O' P1 r$ y6 W! q$ I/ Y/ @ - if (v > k) return k;5 w+ X) M6 |) ]8 C, T2 J& v
- if (k < 0) return 0;
- ~0 ]4 j; K! W* C, z+ w. G9 g: c: o - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 G+ {: O! X' m0 X - }8 U& O6 a3 a; n/ s
- run = () => {// 新线程1 Z/ k6 y6 l, V r- g+ W% c3 J
- let id = Thread.currentThread().getId();: a/ R: j- q7 U0 m" j) x# G: J1 N
- print("Thread start:" + id);# v- J3 k/ w; p1 l: o$ x0 e6 c
- while (state.running) {
" u: g# @, ^7 Q - try {
# @$ b% w# ]7 E E7 ]( Z - k += (Date.now() - ti) / 1000 * 0.2;
( }6 H3 h) N2 x Y$ Z4 ] - ti = Date.now();/ q+ y# M% j: c. w% v* C
- if (k > 1.5) {& t. G0 \" _" X1 f% t, A6 o9 F( Z
- k = 0;
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- setComp(g, 1);3 P" J& j" n c' ]4 ~
- da(g);) `9 B) D7 l J$ Y
- let kk = smooth(1, k);//平滑切换透明度
1 u$ y& G5 v6 z" e* X - setComp(g, kk);
* ]: k8 Q( w6 i- H: k - db(g);% o" l; B# L# G+ j+ N1 K' _) r+ z
- t.upload();
! H' s p9 N+ u5 F8 R0 w - ctx.setDebugInfo("rt" ,Date.now() - ti);
6 U- \- C! p: U* B; ` - ctx.setDebugInfo("k", k);. D! i1 t7 k* k+ a+ a8 c' O+ b0 k
- ctx.setDebugInfo("sm", kk);7 K+ c: c! U5 N3 X& s- V
- rt = Date.now() - ti;
e( o- d; ^+ f7 g& i - Thread.sleep(ck(rt - 1000 / fps));& T* C9 y7 \+ Q6 A2 y
- ctx.setDebugInfo("error", 0)# S! K' {4 N9 M! [
- } catch (e) {
6 F$ ]% ^# Z& Y' u - ctx.setDebugInfo("error", e);) K$ A# [% h. { Z, D* F9 C% Y0 A
- }
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- print("Thread end:" + id);: }, @+ W4 i, \9 z
- }
2 f2 ?$ d/ o, l - let th = new Thread(run, "qiehuan");; E N, y- s! A) J$ k+ Z/ l
- th.start();* Q b4 y. K% F8 j( K
- }1 \0 w1 P% t# B, O; U7 R0 o# @+ x
3 O. `. g1 N B- d! u, j- function render(ctx, state, entity) {
; n! Z' `3 N! ~/ c) ^3 } - state.f.tick();
, P6 R G' j9 `6 \* O - }
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- function dispose(ctx, state, entity) {: g, O) H+ B J& f3 i# u% }- K- q
- print("Dispose");% y7 k& g6 C9 G1 B9 F7 R
- state.running = false;
6 \- Z% A/ C$ O' u$ {% A: p' Q - state.f.close();
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- 4 g# r% g1 U% d" q0 R. h! H
- function setComp(g, value) {
; w# d, z7 {+ f- M - g.setComposite(AlphaComposite.SrcOver.derive(value));6 z' I4 [3 a, o% P5 l
- }
复制代码 / p s" n* i. o+ w. B; n$ G
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。
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( s8 ^* _# N/ S% H& P3 Z$ p# F
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