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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。2 B' G& V L0 l s
- importPackage (java.lang);7 c9 ~. d' s+ d$ R, b5 H5 R/ G
- importPackage (java.awt);
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' T# }! Q& o5 Z6 T- E% G- include(Resources.id("mtrsteamloco:library/code/face.js"));6 `3 U8 G) e* Y3 u
" U4 \0 w/ S) m, |8 u: `+ L- O- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& o" O* F, I& c; n5 }; O# K
- & |' `& @ F$ j
- function getW(str, font) {9 v' D9 m, @- h8 e. j
- let frc = Resources.getFontRenderContext();: `: Q8 [& L; i- k
- bounds = font.getStringBounds(str, frc);
5 Z* W6 Q2 b1 [, N7 Z; v - return Math.ceil(bounds.getWidth());7 h2 ^/ F8 z) I/ N! ~- _: Z
- }
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& u0 K+ @4 j7 f( b( O% z/ W- da = (g) => {//底图绘制
J2 G; t8 L S& D1 ]0 X - g.setColor(Color.BLACK);* s% p8 W k& S1 }9 b: K
- g.fillRect(0, 0, 400, 400);
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; t4 K R4 A I3 p2 F3 t3 F, t. M- db = (g) => {//上层绘制
1 {1 M$ R1 F9 M; F3 { - g.setColor(Color.WHITE);% c- J$ Z$ ]0 E7 e; n4 E) d) _
- g.fillRect(0, 0, 400, 400);
+ T. t. X) F: L0 ^& m. v - g.setColor(Color.RED);
y8 f1 J% c0 ^$ s+ o' }( G3 K" U) M0 e - g.setFont(font0);# h# }9 F# \) A) m/ i
- let str = "晴纱是男娘";
" {2 U( n3 n' X( T+ N1 m: \9 M( d - let ww = 400;6 m) X5 F- r; Z$ G4 p2 v
- let w = getW(str, font0);2 |# g! s- c3 _( P
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
7 d( y/ F# T; d+ N, D! \. x* D - mat.translate(0, 0.5, 0);3 Q& @4 u' Q/ j# D
3 B( [* n" s$ [/ i; b- function create(ctx, state, entity) {; B7 \9 V- O1 j( x; l8 E
- let info = {2 z/ i( c8 s; y- u. y) b
- ctx: ctx,
' g- L4 U# C+ Z6 }9 f [ - isTrain: false,, o k" W( w2 s8 D
- matrices: [mat],
7 ~/ U' a! o8 v4 t2 d. t3 ~' \0 u - texture: [400, 400],1 }5 H7 b4 p5 @' k# ?) c9 g
- model: {
O0 \+ f8 T) b# N, B - renderType: "light",! H6 G' o* S# c4 U* D* W1 M8 N
- size: [1, 1],. G% b7 }- K. r
- uvSize: [1, 1]
8 N0 ^( q7 B) D n - }
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- let f = new Face(info);
$ D1 t O% W4 e+ k, g1 b - state.f = f;
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# F, i& ]$ t/ e; z3 m" _) i' ^- let t = f.texture;5 w: [ E9 X! _ h* _- u
- let g = t.graphics;
3 ^, c2 E) X8 R* j( U# V; J - state.running = true;
* M, _2 U- u$ C( `8 ^ - let fps = 24;, Z" g: w/ [9 K1 A6 |8 f
- da(g);//绘制底图
& v2 [3 @4 r! [ - t.upload();
" n+ {+ t7 S- X' c3 ]/ I - let k = 0;$ d6 N+ l1 S0 o- m R# b; J
- let ti = Date.now();
5 x& W0 P+ w" {7 B7 `% H - let rt = 0;
8 ~% W) ?* X7 n - smooth = (k, v) => {// 平滑变化) V6 u/ k7 z! f, g1 H$ a J
- if (v > k) return k;
$ a/ ~/ w) r. n - if (k < 0) return 0;. _5 M! B$ v3 K, \* [( t9 A; d: n6 b
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
9 c+ l! Z+ U w0 M& d" q - }. U6 U6 V. q/ @! v* I! f4 D/ p7 {6 X
- run = () => {// 新线程
- l# P- s9 i& t+ D7 f [ - let id = Thread.currentThread().getId();, M R3 m: j) \: c+ J- N; P
- print("Thread start:" + id);
+ W R6 s4 N! L- y$ q1 f - while (state.running) {
l( e5 z' ?- S6 g - try {% G$ ^4 X, N: s# A$ E7 U
- k += (Date.now() - ti) / 1000 * 0.2;
' y1 {+ w6 O' u2 l% w - ti = Date.now();
2 Q$ q& Z1 n% A! s6 ~1 w3 a - if (k > 1.5) {
, ? h+ ~. p7 V/ P9 s - k = 0;
8 a0 {# j4 _9 O! u - }
7 W1 {# ]0 N! U: h! C - setComp(g, 1);
1 p2 g6 H' }6 u! c& Z2 k( a - da(g);7 l( x8 q& a, d7 A0 Q; x9 a: j
- let kk = smooth(1, k);//平滑切换透明度
4 p8 h" X1 F4 U, ~: L4 _ - setComp(g, kk);. P) S' W9 @% `/ b$ c5 C
- db(g);6 w1 l) M2 M i5 H
- t.upload();" z1 n: D+ j( T- f0 b5 `( G5 N# h
- ctx.setDebugInfo("rt" ,Date.now() - ti);; m" X0 L- M( m& r
- ctx.setDebugInfo("k", k);
4 t1 W6 _- E1 r9 _& l6 C - ctx.setDebugInfo("sm", kk);. {/ s/ P! |5 U$ H
- rt = Date.now() - ti;0 p0 `5 b/ z3 Y& J# e5 A$ ]
- Thread.sleep(ck(rt - 1000 / fps));
- `9 l' \% Q( x$ p* i% Z0 N - ctx.setDebugInfo("error", 0)) s4 B/ g# X4 n( c% A7 Q
- } catch (e) {
7 K; U' X# K/ [$ c6 E( _% k a - ctx.setDebugInfo("error", e);
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- }
. D( A4 \" S" {1 [5 ~7 u - print("Thread end:" + id);
' |: J6 u( X3 e" m. T* y - }
# T O# S& ?0 F6 u - let th = new Thread(run, "qiehuan");0 U% K& U# o( c3 a. j' I* [8 W
- th.start();
2 e! J* U8 ^: G. d: W a- m - }
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- function render(ctx, state, entity) {
) H# I) ?: h8 M( E$ o+ [0 P0 q - state.f.tick();
# w' W+ A. V: \# a' K - }
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- function dispose(ctx, state, entity) {
* F; y. ~5 |6 x& s; F# D# t - print("Dispose");" V8 n- X: s C) R$ d& P$ C
- state.running = false;
6 X- H: l7 k$ z& U3 @+ Q. s& | - state.f.close(); J K! g) q8 ^2 m N7 n( s
- }
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- function setComp(g, value) {3 M: e. a( t. G+ J) a0 A
- g.setComposite(AlphaComposite.SrcOver.derive(value));
0 F/ \8 T& O% x2 V: q4 | - }
复制代码
/ C8 x# n1 M: y; f. t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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! d4 E9 v$ c$ F+ }顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下) X0 ?' X, j$ l9 t8 S& }/ v+ E
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