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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。
& i; q: t* J3 z( T8 Q6 j- importPackage (java.lang);+ O/ b+ I- K' D% q% p6 _0 P
- 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);
- _3 d4 S; x6 [8 k - % _$ M: @& x* v* |* U9 g
- function getW(str, font) {
: A6 O) a/ |: h# | D m1 l - let frc = Resources.getFontRenderContext();8 w- T' h7 V( o6 W" s& {
- bounds = font.getStringBounds(str, frc);$ e8 z5 u1 P. d, F8 ]2 y E
- return Math.ceil(bounds.getWidth());* T4 a; D, j2 Q2 `. S1 a! L
- }
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* n3 f. ^4 e/ R. o, {. Z- da = (g) => {//底图绘制; ~. ^6 N' _; {9 R
- g.setColor(Color.BLACK);
7 \# i' u" d3 U" A$ d/ I - g.fillRect(0, 0, 400, 400);* _1 ~. q6 W4 [/ p6 c
- }
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1 R" G9 s. c: M0 z- db = (g) => {//上层绘制
6 D8 B& x6 d h, C- ~ - g.setColor(Color.WHITE);
! w1 x( `2 S) R# m& v - g.fillRect(0, 0, 400, 400);8 s- n8 Z2 k% ]' @) d
- g.setColor(Color.RED);2 O0 C% `! e" N" _( x. p. {+ d
- g.setFont(font0);: g5 O% q9 J9 o c, d# w# s
- let str = "晴纱是男娘";
0 M; r1 R, w7 V! ~% | - let ww = 400;, E0 _5 P9 x- w2 A
- let w = getW(str, font0);" R4 A- R/ y. |6 _2 V$ G
- g.drawString(str, ww / 2 - w / 2, 200); G9 I) ], i2 Y" |9 o# F
- }6 b- i% R- t0 t- \
- , t" C& U: P6 Y' w5 f
- const mat = new Matrices();' z) V& v, c( D8 `% \) m
- mat.translate(0, 0.5, 0);( {$ Y8 w; j! L; J3 w
- ( W4 R! D' ]: v/ y+ W
- function create(ctx, state, entity) {5 u( F: V7 T9 H- a
- let info = {) }' C6 B3 x* ] v! l& l0 d
- ctx: ctx,
3 g( G2 A# o2 a0 `2 R - isTrain: false,: B: o6 |9 M7 \
- matrices: [mat],
( u' N0 W4 g) b+ u( c3 K! n - texture: [400, 400],3 I$ y+ J+ b9 [2 q, j9 c9 ?* }6 }
- model: {5 P* J* C( S3 x& v7 _+ C' h( t
- renderType: "light",' e8 P( q. S3 o, w1 O; R
- size: [1, 1],( _( a* p& W0 y* d7 Z% g
- uvSize: [1, 1]
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1 L, ?( _' A1 }8 S, ~ - }
8 S& @' m: \- V1 C) L4 s) Z7 o - let f = new Face(info);
. k* W- O( O& z, T2 F - state.f = f;- v: {, l0 f9 o$ U
- 3 w8 n0 X: m) t# m/ e2 V+ b3 w; m$ M
- let t = f.texture; R; j5 ?0 Q- G, {
- let g = t.graphics;
+ s* C. M% g F2 o - state.running = true;" k4 j& P( t3 i2 K9 I7 a+ f. M. B
- let fps = 24;$ s* M- |0 Y! b, B) d& W
- da(g);//绘制底图: k; m1 ^( x8 C
- t.upload();
1 p9 b' B; `) |, O) T - let k = 0;
+ l6 h- \7 W' L. D& O5 D - let ti = Date.now();1 T( {0 b; S: ~! I0 P& p
- let rt = 0;
) P- h8 j- U( {& o& h% z3 C' i - smooth = (k, v) => {// 平滑变化
# m. s) S3 ~/ Y( }) P% K - if (v > k) return k;. l7 o( |" |7 w
- if (k < 0) return 0;
* b! j& c; G3 y {* f - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程* J& y+ S, X- g3 ? `
- let id = Thread.currentThread().getId();
+ `2 h$ g- ^: d- u# r$ C. U8 K - print("Thread start:" + id);6 l" R( P8 k; A' I0 g9 d) W0 _5 Q
- while (state.running) {! D, D7 n! w/ k. ~& W
- try {# Z6 [, V) `3 k! S1 y
- k += (Date.now() - ti) / 1000 * 0.2;8 N& d( e( G6 T [
- ti = Date.now();
! Z" W- ?' I4 W6 t5 e - if (k > 1.5) {. t4 E7 q! |( x# y
- k = 0;5 _% P" G) S+ W
- }# c+ T d) S* f" o, U$ r
- setComp(g, 1);
$ T( _( X9 k% J - da(g);0 s) s8 O5 O( t2 T" j
- let kk = smooth(1, k);//平滑切换透明度
7 z1 f/ p* i2 n* l - setComp(g, kk);
, d2 L5 C, u( n$ v. M7 \ - db(g);
- @! Y$ ~) u' M" }4 f- Z- W - t.upload();# _; ]8 J5 Y1 f$ h* i# d$ [
- ctx.setDebugInfo("rt" ,Date.now() - ti);
3 F Z2 k q$ X - ctx.setDebugInfo("k", k);+ v2 o' ]! o7 o3 |# }
- ctx.setDebugInfo("sm", kk);0 }) p9 F9 b' T
- rt = Date.now() - ti;
1 c% V! j5 |0 Z9 P* u - Thread.sleep(ck(rt - 1000 / fps));
6 E9 p! }1 Y5 D* ] - ctx.setDebugInfo("error", 0)
9 A3 n2 y$ D4 `2 i - } catch (e) {& A7 f; I7 q$ ~
- ctx.setDebugInfo("error", e);0 _* O5 r4 ]; y( m5 s- X4 i
- }. o3 a/ P f( ?5 Q
- }# A' z4 M* |) I8 ?! O8 }% L0 i# s# e
- print("Thread end:" + id);* B: h* c! H% Q
- }
: B- J N+ q/ h9 X' R - let th = new Thread(run, "qiehuan");
. K Z! C1 I/ v/ x - th.start();: W9 T9 B n+ V7 a( [1 C. Y% b
- }
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5 I& v8 J7 g7 R) |/ [( T& Q- ~: s- function render(ctx, state, entity) {4 [, t6 |( W6 r
- state.f.tick();
# _0 U* v' U# ^ B - }
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: g! `7 p- h+ e. b7 D) D8 A+ S l- function dispose(ctx, state, entity) {
# _0 H3 c t" G7 t - print("Dispose");, [ ~; _0 R# v; _3 n" c& s
- state.running = false;
3 [6 n( }6 p S - state.f.close();% M$ P& C5 b" B
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3 `- W; F% e* G$ Y1 S( U- function setComp(g, value) {7 j1 ~* [' }* O
- g.setComposite(AlphaComposite.SrcOver.derive(value));0 _8 n- S; r: P5 J1 `# U: \
- }
复制代码
6 F8 X' H6 i, G" |6 e* |+ 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。
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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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