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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。
$ S8 T% @# s8 Y5 V" z- c; M- importPackage (java.lang);
) b( `6 M* H* V# E - importPackage (java.awt);3 [( l x# I% T4 u3 O; Q
0 `/ R" N- Z: l8 J- include(Resources.id("mtrsteamloco:library/code/face.js"));/ V7 `% ?; s+ t$ ]5 W1 [
- ' W& W3 K j3 a6 y! ]
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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6 n' j5 A8 P, X- q6 a' U2 i4 ?2 B x- function getW(str, font) {' @3 m. l% i F! F) o3 S; g2 R& ?- o
- let frc = Resources.getFontRenderContext();
3 F% e0 H; V- t( C' t# L: r, W0 @ J - bounds = font.getStringBounds(str, frc);8 K. f+ e# G7 B3 w. J4 N" s
- return Math.ceil(bounds.getWidth());0 J+ A& J: o1 B
- }
0 p) i6 G0 ]% ~6 b' L - + p# f4 q4 V" z- B9 t
- da = (g) => {//底图绘制
/ i& F# |1 S! y) e4 O6 |- B - g.setColor(Color.BLACK);
" y+ Z6 Y4 M7 I; d. ^4 e - g.fillRect(0, 0, 400, 400);. q. U2 B+ ~' M1 G
- }
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' s) g9 I, \ z8 x- db = (g) => {//上层绘制
. g) H5 g8 m$ q; S; ^2 r4 L; s+ | - g.setColor(Color.WHITE);2 \. p0 S( T5 d) S, k2 s
- g.fillRect(0, 0, 400, 400);
* Z4 L) l2 o5 L7 e2 c - g.setColor(Color.RED);5 M: H+ ] o( _# m+ q! _2 k
- g.setFont(font0);
7 J. ?0 x, B& H' I5 y0 { - let str = "晴纱是男娘";( ^6 D6 o8 t) J9 U! z$ J
- let ww = 400;, y: o- B: B. H# P2 T" j
- let w = getW(str, font0);
2 B' Z: W) [3 [5 b - g.drawString(str, ww / 2 - w / 2, 200);
' w% a! }( R% v2 w) P; @ - }
5 b5 T3 J: `# U- ~! h4 z - . \$ V6 g. b _9 G: f3 X& P* F
- const mat = new Matrices();
5 B! ~6 c- Z& J - mat.translate(0, 0.5, 0);2 _' P5 g4 r2 G7 x5 m0 l: @" ^ N
- - E/ m# ^: P4 ~. y; L
- function create(ctx, state, entity) {
4 v/ W, l, S- x- v - let info = {( N: ^/ G$ c1 T" b" c2 L/ f
- ctx: ctx,
r& N0 K7 J# [4 a8 P6 x, D - isTrain: false,7 a/ P7 d. ^! y/ [% ?5 S
- matrices: [mat],
, {1 P) z( P: r, i( t7 [1 w8 h - texture: [400, 400],, W" y1 I6 T2 A# w9 H; ?
- model: {! |6 V8 B5 m9 _: Z
- renderType: "light",
: ^, ?6 u K0 L- J! U - size: [1, 1],
; j* K+ \* M* A% C1 [" n9 r: P7 Y - uvSize: [1, 1]
! ]& T+ Y$ q' Y! o. N4 M - }
8 J; t" I/ _( ]2 w! w5 a P4 E - }
& q: D- x& a1 g r$ h - let f = new Face(info);
( Z) Q* j$ M1 V/ r5 E( b4 |" z - state.f = f;
/ d0 K; v% y: ?. t w - # O: i: U& ^3 V2 n! K; P
- let t = f.texture;
5 u) x) G* ~# }% ]+ G! j6 K - let g = t.graphics;
/ A5 h3 x$ v: s# o6 g% N( ` - state.running = true;2 D2 i+ i: x% p& u
- let fps = 24;7 E) f- ~' |! C6 z9 P) e2 D
- da(g);//绘制底图
! |0 a, Z+ @& v a - t.upload();
1 P0 F- Y6 Z' D( Q3 {1 z. q/ X - let k = 0;7 w# G( ~6 T2 C- [2 }( {+ ?# K0 F
- let ti = Date.now();" ?6 {- z) k& v- M. K' R/ V, c
- let rt = 0;
+ a5 H# y- T" j# w - smooth = (k, v) => {// 平滑变化
# n( _2 H8 { F - if (v > k) return k;6 U% R9 e. a7 @$ m3 O4 P
- if (k < 0) return 0;4 V5 t. N& ?" f- G" i" N+ Z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, a4 M: U/ B6 w3 f
- }
$ y" B4 l# a/ g0 k - run = () => {// 新线程- v; Q) U2 K4 G
- let id = Thread.currentThread().getId();
( m# ~# @; U- E; W# g, O' ? - print("Thread start:" + id);+ x! V* d, W0 v" t
- while (state.running) {
- C, z6 e3 ~8 W7 K - try {3 |; p( A+ i* z% ?5 J
- k += (Date.now() - ti) / 1000 * 0.2;# H5 [; z/ i: c" e" W0 N1 S
- ti = Date.now();
* e" v* x, L4 |2 c3 P9 L - if (k > 1.5) {" A: @0 O- y5 L( _, C: _1 Q
- k = 0;* {5 w3 }7 R( Q8 d
- }
4 R0 C5 W% B, M1 i# M" z: A0 e - setComp(g, 1);
2 f4 @4 n3 W3 J; V - da(g);9 ~% a+ L- H1 ]7 Q5 t3 F
- let kk = smooth(1, k);//平滑切换透明度
0 S! h+ o3 \. D( f: g - setComp(g, kk);. i- x: ]0 @" Q$ W. i: s& C$ O" {$ z
- db(g);) m m8 D4 T" }' M* P: c" o* U$ D' w
- t.upload();9 ^6 Y: Z1 t4 ?
- ctx.setDebugInfo("rt" ,Date.now() - ti);
* _* t8 R6 l% W+ B# H - ctx.setDebugInfo("k", k);
8 i3 k2 F/ t6 e5 X. u0 H - ctx.setDebugInfo("sm", kk);
, j" x) _1 k( S( x - rt = Date.now() - ti;' f4 c5 r# j8 R& }
- Thread.sleep(ck(rt - 1000 / fps));4 l, t9 D: Q: a% K( F, j
- ctx.setDebugInfo("error", 0)
' U% S1 P5 V: M3 R" y2 m - } catch (e) {
, e$ x+ I- R4 |+ Q - ctx.setDebugInfo("error", e);0 }, F9 h- ~, z. \' v
- }( Q$ X: k% ?6 m. O" @. Y7 O8 X `
- }
' x+ b/ U) `0 I: |" a! h) c7 P7 o - print("Thread end:" + id);4 I3 b; M5 Q' y8 O; S- c# _
- }* n5 ^6 v& }0 w) z( l
- let th = new Thread(run, "qiehuan");
+ a/ K7 m5 A$ R9 f - th.start();, W& C# f" l1 U# W& p) X6 u. X7 b( y
- }: n. F6 h& ^4 g" U3 ^3 e- A
- # g( W9 Z+ o. T: D
- function render(ctx, state, entity) {% ?" }: |6 f; [7 ^! U; ]$ r5 Y* d
- state.f.tick();1 X5 Z$ v ?+ A
- }
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- function dispose(ctx, state, entity) {" _' |! x: q$ A, [
- print("Dispose");* S/ s% c) n1 B P
- state.running = false;1 z: p5 b. y0 E7 z/ L" T" G+ b
- state.f.close();* g( p4 D' e. q, {6 l3 F& j
- }# h5 L I7 ?" u4 ` o0 i! V
- # A. D) ?* n! [# F* t8 ^2 d' H( i, T7 W
- function setComp(g, value) {
# C. Q+ Y) l9 L6 e* a( d: O6 B - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 R, x2 n! W' i+ c# \ - }
复制代码 ' d) s. Z* V% ~: E
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。$ d- ~9 R# i3 U0 p1 |) d2 g9 [
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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)7 V2 P; h/ q& i5 [
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