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5 j% l. B& [) n i0 s! 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。; v# Y* j. i8 w! O
- importPackage (java.lang);
' V+ Q' e- P, s - importPackage (java.awt);4 A" I6 t2 c6 y& Q. }
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. a7 ?! o, x# Q- K/ Q# T5 v- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {. H& k0 e# j! L- F
- let frc = Resources.getFontRenderContext();
9 z; ^/ t$ {) f7 Z3 U# J) u. H" ] - bounds = font.getStringBounds(str, frc);4 F& q- ~6 s/ U. C N& e
- return Math.ceil(bounds.getWidth());
6 [+ r& h4 K% j1 n% p s! ? - }
- l+ a/ G& W: _/ X5 \. B, C - 1 P2 ?: M* C* {& P' O) m5 D3 f
- da = (g) => {//底图绘制- H* o+ y/ h% ]3 E3 M
- g.setColor(Color.BLACK);
9 v/ s- }+ {* O1 h4 n( v4 @& c - g.fillRect(0, 0, 400, 400);
4 B% V. \: M* m8 B( u7 C& K5 H - }
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- db = (g) => {//上层绘制) K0 l. q! p' Z
- g.setColor(Color.WHITE);. b( y4 I0 Y( d" A2 {) q# I
- g.fillRect(0, 0, 400, 400);
/ T. g# k7 Y* Z4 r2 E - g.setColor(Color.RED);
" V- V! S4 e1 u - g.setFont(font0);5 u6 v$ c7 x% J/ c9 g$ |
- let str = "晴纱是男娘";
0 ~; p V" c7 Z% B) u3 G6 K - let ww = 400;
' j! K4 b/ l3 d+ Z7 R2 W+ B - let w = getW(str, font0); U( G2 Q% N6 b9 S/ {- i# z8 q
- g.drawString(str, ww / 2 - w / 2, 200);
3 n: k3 P4 C- \. w1 W" k# ] - }
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. `) Z; g" k6 U4 P- Q/ r. t4 y- const mat = new Matrices();
8 Z D9 e3 S4 s ?: Z5 G5 v - mat.translate(0, 0.5, 0);
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3 U6 D" d, Y) r) ^" Q, E- function create(ctx, state, entity) {: Y! u L% P# X/ J9 e0 k A4 w6 t; V
- let info = {3 I J; x/ X3 L( f3 n5 W$ G
- ctx: ctx,- P3 k) z( g0 z
- isTrain: false,1 p& [% D7 I; k% K
- matrices: [mat],( g0 w# j" I7 S2 v" |
- texture: [400, 400],# M0 U. m: ]8 y f7 }9 b
- model: {
, R% L8 z; G1 V m; Y0 t/ g0 l - renderType: "light",
* |1 m$ g+ f* d# j - size: [1, 1],
, M i/ _. U5 K! k5 t( A - uvSize: [1, 1]' i) P# G0 w, X, ~0 W
- }
4 p z1 y; [* h' I# W: I! O! n - }
" Z' b/ |7 `0 C6 b - let f = new Face(info);6 y, O, Z- ]% L
- state.f = f;
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- let t = f.texture; N' I4 t( q& Z8 t
- let g = t.graphics;
/ U4 l/ N. T* M$ t# ]6 Q - state.running = true;
5 z2 z, e( t* F - let fps = 24;- Z5 z4 \& I7 D" C/ _
- da(g);//绘制底图* c; d2 N; K' y
- t.upload();
- S8 p) Y/ \7 U0 B" O7 ^ - let k = 0;+ j2 f0 I! X& c, {' A/ K
- let ti = Date.now();1 `9 y2 f2 c; Y" n) ^
- let rt = 0;2 e; F( g+ u2 Z3 B$ d! B
- smooth = (k, v) => {// 平滑变化
( u9 e; R, J4 ~2 d7 D* k% B - if (v > k) return k;
5 k4 n6 l/ z/ i+ @+ X7 T5 v - if (k < 0) return 0;" N5 Q2 u' P- D7 U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
9 a! k6 W# B7 H - let id = Thread.currentThread().getId();" E7 j: g6 k! \+ k# h. Q, C
- print("Thread start:" + id);+ N+ g" w% Q$ m
- while (state.running) {. X5 c4 ?/ O- F4 k' V' d4 o1 d
- try {: W$ }$ X6 o; q8 @$ a
- k += (Date.now() - ti) / 1000 * 0.2;2 ~" ?' K( r& _
- ti = Date.now();
- G* E2 y8 G4 E - if (k > 1.5) {
4 S8 _* l9 a! X4 N% l6 t9 t - k = 0;
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2 S3 Q: v6 o9 k- ]4 f! d! D - setComp(g, 1);/ N. y; M ^9 `; e2 s
- da(g);) _& c% G. A/ g/ [" A/ ~& V
- let kk = smooth(1, k);//平滑切换透明度5 L3 |4 t* ^: t* v) a& Q# [9 S
- setComp(g, kk);
0 X' O$ w4 \' o" X* Q( K9 |' i - db(g);
4 X! x9 ^. j5 q - t.upload();, h- i- {# c2 h: s" W5 }& g
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 t( |# Y( I2 O" A- I4 } - ctx.setDebugInfo("k", k);
) c: T! G, f! E - ctx.setDebugInfo("sm", kk);' Y- u, p O: S" l% U0 v& Y
- rt = Date.now() - ti;
* `$ O) w2 k5 O. U: [ - Thread.sleep(ck(rt - 1000 / fps));% l+ Q6 K1 U0 a. g
- ctx.setDebugInfo("error", 0)$ g* l6 r h9 h7 ~8 L8 X
- } catch (e) {
8 @* s2 d. ^. Q - ctx.setDebugInfo("error", e);
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- }
7 Z; M9 A* W; ^" `! r - print("Thread end:" + id);" q* N$ B% M8 q3 y9 A" E9 u
- }
# A9 D; F% Z# O - let th = new Thread(run, "qiehuan");
$ s- s/ \. E0 C$ l3 ^8 w3 _ - th.start();/ \3 f6 P- C" N4 F% X
- }
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3 i5 V8 E" c: D! S- function render(ctx, state, entity) {
. Z2 |4 M4 N& p" m: e+ Y* I - state.f.tick();! X1 H' h4 N y4 f$ y- s U
- }: k& c1 h u N" N% l5 i( H
4 ~; c8 B o% T" m- function dispose(ctx, state, entity) {# X2 v/ |7 u( _3 {
- print("Dispose");
% M! u% J6 R' Q9 N7 D( m5 h% D/ X - state.running = false;
- v$ k0 t8 V! y - state.f.close();. X0 v" f6 O1 F p7 e
- }
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- function setComp(g, value) {
$ A2 ~& S+ e8 O2 w - g.setComposite(AlphaComposite.SrcOver.derive(value));0 O& s8 t1 i1 M$ G/ g6 w
- }
复制代码 1 B4 v) D. m& O4 \% Y! {9 Q
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。0 A/ N8 r* t5 S% V% h4 e
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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)
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