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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。/ P7 B1 _2 v I% l/ x7 v: A
- importPackage (java.lang);
; c8 h# b8 d- }& A: g% w; ] - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
) r; `6 `* y$ P. f - let frc = Resources.getFontRenderContext();, U" g* [/ J6 N& k) K5 ^8 d
- bounds = font.getStringBounds(str, frc);9 ^/ U! ^% J/ U# Q/ ^
- return Math.ceil(bounds.getWidth()); }* E, I) m/ P; y. `
- }
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- da = (g) => {//底图绘制
) S* ]9 ~% a2 K/ N' q! v- g9 d8 {7 R - g.setColor(Color.BLACK);( H6 p1 l# a: _. h: F
- g.fillRect(0, 0, 400, 400);8 V, u! x5 I+ i, E0 g
- }4 U* Y5 `/ T J
- ( H$ j* |0 o; g& u1 [5 E4 d9 s& |9 z# K
- db = (g) => {//上层绘制
% e0 P2 o6 K# z1 d2 f, C3 _ - g.setColor(Color.WHITE);8 {+ a+ |$ _. s2 R6 b
- g.fillRect(0, 0, 400, 400);
+ @. E; B9 |( L! _ - g.setColor(Color.RED);. Q0 s9 r/ ]# r6 {7 } K
- g.setFont(font0);) J/ M" a( [2 @; ?3 B* {
- let str = "晴纱是男娘";
; Q) }% Z; t E* u+ X3 I - let ww = 400;
. L8 K8 ]3 ]/ M' ]0 x# f8 ]/ l; w# Y - let w = getW(str, font0);
/ T4 P6 D T% B4 [* X! F) R. q; Q - g.drawString(str, ww / 2 - w / 2, 200);
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]0 o6 q+ q; r7 l# j8 S- const mat = new Matrices();
( Q3 V7 d' O4 m: Z - mat.translate(0, 0.5, 0);: @4 o6 H0 W7 z- p
6 H& h. V. J: [: p8 R5 J: ]- function create(ctx, state, entity) {
q4 ?. `1 W7 {" |# G - let info = {
0 Q5 `1 { Q( U3 W* t! A! K9 X - ctx: ctx,
9 }3 a* q7 {! n: M a* d/ x - isTrain: false,
4 e* w% F; C8 E5 c - matrices: [mat],
- q5 Y. U8 x7 \4 Y7 @ - texture: [400, 400],/ n( J' D: E0 F n# p: V, u
- model: {, ]( i$ h# g! m2 s+ \: V) n
- renderType: "light",
3 ?0 K& c; b4 L6 Q - size: [1, 1],+ s; i& w+ W' h5 @+ g5 B( p
- uvSize: [1, 1]
( p2 a. }, P- h0 H6 c; k% w9 T - }
8 H/ i; @. z" j3 D% [ - }
- ? t3 R' s1 q. C- o1 t - let f = new Face(info);$ N" |$ _ P$ U( g2 m( R
- state.f = f;7 X6 V+ o5 u& V S
& y8 e7 s+ K( c- let t = f.texture;
& K# @& p4 ~5 Y) d2 {: a' L$ \ - let g = t.graphics;
; ~5 x8 z% \' [ n% o8 L0 | - state.running = true;
, I- o! @3 f% U. h - let fps = 24;
- D0 T3 K& j3 \ - da(g);//绘制底图
4 |5 a6 O& ?# K# L6 A0 `0 X - t.upload();
G4 B- G# f6 {3 J- w/ o - let k = 0;0 ~5 c- C' p! m) r: o& ?- i. G
- let ti = Date.now();* m6 }" l/ |0 K! _% s1 x
- let rt = 0;9 J$ o( r/ Z$ c1 M, y+ e3 a
- smooth = (k, v) => {// 平滑变化
|+ ? v# D1 U5 i" ] - if (v > k) return k;
$ p0 A$ I+ x/ c2 s) G8 h0 N - if (k < 0) return 0;3 ?' i/ C5 _& S0 q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 R! @' E& k9 ~5 k% K% d
- }( v: z7 c4 _- ^9 [! X8 r( ?
- run = () => {// 新线程7 z0 H) e2 U, R. w7 e$ J, r' d
- let id = Thread.currentThread().getId();
- j0 l; a& M E. h8 n - print("Thread start:" + id);4 u9 D1 c. E, G* y
- while (state.running) {
0 t3 S. W; }: ^$ e( i - try {7 l& O& l# I- D0 R% k
- k += (Date.now() - ti) / 1000 * 0.2;# a' i- e+ m0 |+ a" T( K
- ti = Date.now();' b- V$ Q2 d7 u0 t
- if (k > 1.5) {
+ p5 z' }$ y8 H; t1 u; _% T2 C% o - k = 0;
0 n4 o% [* n- e6 h0 E - }
( Q' X5 g0 K6 O; l& q- N; w0 X8 W - setComp(g, 1);6 Z& J) }. u: n: D
- da(g);& y8 R2 m, v% P8 J
- let kk = smooth(1, k);//平滑切换透明度
% e; F K# W4 X8 W6 _ - setComp(g, kk);! C# _8 t+ r. j; [6 M7 [0 @( w
- db(g);
' g2 P$ E/ a* }8 E k - t.upload();) @' x# J5 F) u' y% D! k
- ctx.setDebugInfo("rt" ,Date.now() - ti);- Y9 u+ v1 ]1 {/ c1 t6 C
- ctx.setDebugInfo("k", k);
1 @% \: `# _5 v( ?: V. R3 Q - ctx.setDebugInfo("sm", kk);+ ?; ~: q5 S; n8 w# C7 |) C
- rt = Date.now() - ti; G2 ]& o7 k7 b( h
- Thread.sleep(ck(rt - 1000 / fps));
! f; G u x, o - ctx.setDebugInfo("error", 0)
2 f0 I6 K u; O - } catch (e) {0 S, P- V4 c9 a/ U% K. E) ^0 Y
- ctx.setDebugInfo("error", e);
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- }
" ?7 G Z! b' g( L - print("Thread end:" + id);1 q& [ c2 u3 u# n O$ w
- }
8 N. A! L! H2 s; Y+ h2 _ - let th = new Thread(run, "qiehuan");
9 U; {, B* M* O! v' q* d8 i) D& q: K - th.start();5 P+ E6 ~. X1 E! W1 H
- }
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- function render(ctx, state, entity) {
' F7 `9 I/ Q" |0 r - state.f.tick();
" ?+ Z: U0 N8 s; P - } d1 b. M( ^/ Q8 t5 c+ K" `
2 R! Q$ h% _; t8 g( M- function dispose(ctx, state, entity) {
% J6 {, O- H2 ?0 W" d/ ` - print("Dispose");6 |! X* a5 H8 g1 j9 @4 r2 V
- state.running = false;
U( z; ?' j h: r - state.f.close();7 F$ [2 W+ W+ P/ h |4 p
- }
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- function setComp(g, value) {
" v! e$ j+ ~. M' ^. f - g.setComposite(AlphaComposite.SrcOver.derive(value));9 E% J- p5 k7 I$ ~$ E: i( a3 z
- }
复制代码 , u* L" u' L- ~5 v
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。: r3 `' F* m9 ^& _, `
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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)5 D6 U! w, V) v3 C6 \
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