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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 M% k4 @( T6 r* O3 J+ a' r( k- importPackage (java.lang);
6 D2 n; M' Y- l }2 s - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));: W& N% w; U7 U! b
! S0 c3 l8 t* H$ I& v v R- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
& G) C0 z2 P$ N2 ^ - let frc = Resources.getFontRenderContext();% h) w& [4 X5 \7 f0 e
- bounds = font.getStringBounds(str, frc);
c! f: l) D& D( J9 }" e8 R - return Math.ceil(bounds.getWidth());% i" ]7 W) q1 V& o$ K. W
- }
: c( A2 ?& A0 W* v$ l% Y0 { - % ^( P0 n+ B6 \
- da = (g) => {//底图绘制, n/ p: n3 r/ z0 P" i" b
- g.setColor(Color.BLACK);4 j6 Q2 s2 H# N i5 \8 |
- g.fillRect(0, 0, 400, 400);
. X7 `* l8 u$ r% p0 I - }
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- db = (g) => {//上层绘制
5 J0 J" Q9 x4 z4 _/ y& Z0 w - g.setColor(Color.WHITE);
4 \& U# ^% ]5 o - g.fillRect(0, 0, 400, 400);/ m; n: v2 J0 a/ [" r: q$ S) K( q
- g.setColor(Color.RED);0 e s. V1 s' _! _' ?1 S; z
- g.setFont(font0);; z3 y7 R; c: d0 l4 C
- let str = "晴纱是男娘";. E& Z0 i, H; X' w: s% p
- let ww = 400;- U+ d% G4 l7 J+ S) W' a9 ]
- let w = getW(str, font0);3 U f- i5 @' J2 J& j6 E! N. @
- g.drawString(str, ww / 2 - w / 2, 200);
- o4 N2 |8 v$ I. t! x - }
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0 E0 L& F# Y+ c4 z& y# ^6 C# g9 t- const mat = new Matrices();
& K9 x) [ l5 f" G' K$ Y - mat.translate(0, 0.5, 0); R1 O& W/ N3 Q1 M. A
- $ n2 Y% u2 @, T3 b# g9 G" _
- function create(ctx, state, entity) {8 D* _& X6 `6 y U
- let info = {
( ?7 p) ~! @- N- s( G, I: W, \: V1 ] - ctx: ctx,
& g) N* Q X G+ i% p - isTrain: false,: k# D1 o. n D; d7 N L' [
- matrices: [mat],
o/ z) E" C8 T3 | - texture: [400, 400],4 s9 @5 ~- W' s( y/ @" V
- model: {
! t2 M9 M- w) w9 O, G) p - renderType: "light",* m2 G5 g9 o; O4 K9 p
- size: [1, 1],3 \; a6 o3 O, n4 |3 |+ d- g! i
- uvSize: [1, 1]
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- }
$ X$ t6 R& L. f- I: ^ - let f = new Face(info);
, |# V, I/ U3 l - state.f = f;% f- L8 K. t, U( ]& f! J" n
; L: p# h( p2 `9 O7 o4 \* T- let t = f.texture;
$ A$ j" u- l7 f - let g = t.graphics;& e: J) t X3 w( j
- state.running = true;9 z4 n+ ^4 O- P, T
- let fps = 24;% p# D4 Z' d# A8 V: o
- da(g);//绘制底图+ }& v: |& e( F
- t.upload();
! g4 J+ t4 r5 D1 s/ x+ a/ U - let k = 0;
: e7 Z* {) ^3 j1 v) V M5 N" o - let ti = Date.now();
9 F H( J; C1 c8 h# K9 e - let rt = 0;. q. m. W& J8 c6 [9 S
- smooth = (k, v) => {// 平滑变化9 h2 N( a" C! |6 J
- if (v > k) return k;
2 v: q% ?8 W% A' v/ w' D - if (k < 0) return 0;! r2 R6 Z- ~7 L7 t) O
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 a% J5 C7 S' z/ E5 A
- }
; K# R: ?: p9 y- ?4 i% } - run = () => {// 新线程
1 u; ]$ X5 N, p- {3 | - let id = Thread.currentThread().getId();! |6 R) S: ?5 ~+ `- A
- print("Thread start:" + id);
1 D0 y' d9 ]4 U8 {. G' ] - while (state.running) {
' D& J6 n4 s" Y( W5 L - try {
: K5 i2 K6 l- o. w; Y+ N - k += (Date.now() - ti) / 1000 * 0.2;! K! H2 |4 Z6 [7 q, X$ y& u
- ti = Date.now();
; Q: {+ q, T5 E6 i. Z2 X2 ~ - if (k > 1.5) {2 {9 K/ h$ P8 K7 y3 ?& L$ e5 K9 t
- k = 0;
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- setComp(g, 1);
$ f- j) [. u2 V% Z' G - da(g);2 C" V$ ?" f# Y6 P3 I% R7 S( @5 C
- let kk = smooth(1, k);//平滑切换透明度& W+ O3 ?1 W; N, @7 J4 T$ I: Y
- setComp(g, kk);
3 r; E& p. u. H: @- F - db(g);
4 x/ H: M; J) s9 a. T& p4 } - t.upload();
8 L- Y/ E. V& L- R6 ?! f N* o, i) C - ctx.setDebugInfo("rt" ,Date.now() - ti);
# u6 A) c* b5 ~- N - ctx.setDebugInfo("k", k);) q- c1 ^+ X1 j5 G+ b5 {
- ctx.setDebugInfo("sm", kk);; Y& O* @7 B6 l( v# G. f
- rt = Date.now() - ti;
$ `9 q f0 I$ ]- t& w2 q - Thread.sleep(ck(rt - 1000 / fps));
/ n2 W" U6 \$ ^4 |1 ] - ctx.setDebugInfo("error", 0)5 _4 t5 F7 _7 O# L) ~2 B4 S9 C" U
- } catch (e) {; {( A: |& a5 `2 @
- ctx.setDebugInfo("error", e);
, {. G9 R+ V* e: { - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");0 \2 l6 D& V$ F2 b
- th.start();5 Y0 ]$ m( Z4 \' h# t6 I. o3 [6 m
- }& ` w2 J4 l. l5 P3 d) B
' c2 r$ b! ?. C% i- function render(ctx, state, entity) {/ B* ]3 b3 _1 M8 d0 `6 V1 ~% N
- state.f.tick();
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- 1 i2 ?! h9 g- }3 ?% M) _
- function dispose(ctx, state, entity) {
9 T6 K2 r" {& @& W4 x. \& q" k5 n - print("Dispose");; l0 e" S# ]) k+ L8 L
- state.running = false;
1 o ^5 j& }9 _ - state.f.close();
5 V% F) f% H2 S) M+ u ?1 ~" x9 { - }
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- function setComp(g, value) {
4 t& E% C5 R5 J' X - g.setComposite(AlphaComposite.SrcOver.derive(value));, X+ l# B Y) B( S+ B& U
- }
复制代码 - W7 k; A1 V. F+ v* t* J. H% u
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。( A# z8 _, M3 k/ O) h
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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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