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4 o" i5 ^$ ~( Z/ D1 i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。
5 C- t9 s1 _4 i* @$ q# _+ W- importPackage (java.lang);
9 ]2 |) C/ I( d& D$ E - 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) {# W/ J m5 J+ T! S+ d
- let frc = Resources.getFontRenderContext();* G9 o& a: {) `' d7 ]5 n9 x
- bounds = font.getStringBounds(str, frc);7 t( d8 S# U+ G, }! K3 D
- return Math.ceil(bounds.getWidth());
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- 7 k, l# p( u& l) @
- da = (g) => {//底图绘制& s3 f1 K4 [* G" a$ }6 E
- g.setColor(Color.BLACK);
' a& S; X5 r) E; x2 U - g.fillRect(0, 0, 400, 400);2 a! y8 x6 X+ u/ E+ q7 o1 k
- }' j, K( w2 i5 R1 f" ~$ s9 w7 r. Y
5 i, A; u% `. r3 p$ B/ ]- db = (g) => {//上层绘制# r% z5 |, \& e
- g.setColor(Color.WHITE);
) _( e( s* [% H! y& \2 i - g.fillRect(0, 0, 400, 400);# U7 J4 o- }# C$ U9 P* x
- g.setColor(Color.RED);
" W, S* S/ g; P$ [0 B' w* J - g.setFont(font0);" ~" Z4 e! J6 p) {( S# ]0 y
- let str = "晴纱是男娘";& i& T9 L' i! p- \0 H. g
- let ww = 400;" L8 ?1 }/ z3 u' j1 V
- let w = getW(str, font0);
8 C# S8 Y0 [8 z8 D5 \ - g.drawString(str, ww / 2 - w / 2, 200);1 W8 B" L+ C! E1 _8 ?
- }
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- const mat = new Matrices();
' H8 y( ]; c1 K3 e - mat.translate(0, 0.5, 0);$ G, f; f8 N; ~6 ]. @
- 6 G: E1 h2 I3 l. Y2 l
- function create(ctx, state, entity) {" u! K. D$ G) s5 _8 m8 G+ j: `/ F
- let info = {
% P6 S7 B3 J# c2 a! H( F - ctx: ctx,
( j% j. I& ^: T! ] - isTrain: false,7 ~# R* `/ d2 c; {7 N0 x
- matrices: [mat],+ k9 @4 j: X7 {: Q) J* n& L" o. g
- texture: [400, 400],% L$ i# r2 w a l$ g
- model: {
1 I4 m; X2 p6 V$ P6 t - renderType: "light",
9 `& v1 R1 u; @' y c - size: [1, 1],* r, W0 p% f" z0 ]* {/ W7 L) q
- uvSize: [1, 1], J# U- Z [) c9 O1 I
- }/ K6 L: Q' I. q) i) k2 u6 T
- }7 G1 S# g3 W! j9 i8 B7 Y. F
- let f = new Face(info);
A( r' t2 B0 [" Y8 P - state.f = f;
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- let t = f.texture;7 K/ [# w$ u2 r9 X: W. E+ b( v2 l
- let g = t.graphics;
$ h5 L {% R1 p8 u1 Z' O2 \ - state.running = true;& Q1 y8 y, v1 y. ^9 E5 Y
- let fps = 24;
# q( m4 K) ~, H- H% Q- V - da(g);//绘制底图
- E) A* h3 y$ A, C' B& G1 n0 a - t.upload();; L1 m$ o/ x1 A- u! T# U G0 S( H
- let k = 0;
( m' A0 x$ p8 t3 c' _ - let ti = Date.now();
D: y, s" `7 o: s" _$ _ - let rt = 0;
3 r# G, ]& n2 H5 ~7 M2 ], k - smooth = (k, v) => {// 平滑变化
8 H0 K' U1 j0 I; s; } - if (v > k) return k;& M! `! w3 b* P$ i# Q( }9 W4 _
- if (k < 0) return 0;" M$ g! ]. G7 O) X" S% N% f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 c1 o. [0 H% [ - }# z; j: F! U7 Z' z9 |& i( h2 G9 L
- run = () => {// 新线程
" |9 _- J0 f. P7 k - let id = Thread.currentThread().getId();& i9 f+ J. _, d. e' g
- print("Thread start:" + id);% {. j' G/ d* ^2 c' ~6 g
- while (state.running) {
0 @! v6 p9 S- u1 ] - try {& P6 j8 Q) }/ F2 Y
- k += (Date.now() - ti) / 1000 * 0.2;
& R, }+ | Q% Y+ V - ti = Date.now();$ Z+ m7 Z; ]5 {; a
- if (k > 1.5) {
* z$ ]7 R/ p* I5 s; k - k = 0;: V3 u" K% W5 L z# n) r$ R( R3 ]
- }" d6 j: _% z, l4 N8 ]' ~3 s
- setComp(g, 1);
* v+ a: {% m! l/ i' p - da(g);5 [. w& J+ U: j R% \# N
- let kk = smooth(1, k);//平滑切换透明度0 [/ ~' r2 Z0 k
- setComp(g, kk);6 X) k* z7 M) [, S5 |- U1 \" ^
- db(g);1 O" N# G5 c! z1 A( J- L
- t.upload();' L* l! O- c, W( r9 w
- ctx.setDebugInfo("rt" ,Date.now() - ti);
4 N+ G6 u3 G& e! P, {% q& y# a ` - ctx.setDebugInfo("k", k);* L2 x. D0 ^3 K6 @; F
- ctx.setDebugInfo("sm", kk);
. w3 @- d: _6 [ - rt = Date.now() - ti;, y2 x3 Q( z+ u$ @# h0 C
- Thread.sleep(ck(rt - 1000 / fps));
4 g/ a- [1 s) M, ]) k3 O - ctx.setDebugInfo("error", 0)
6 e" |, h# k( s+ d - } catch (e) {
2 T9 A8 f) j) w& m/ I) U - ctx.setDebugInfo("error", e);! r) Z* V$ h. R- b6 A. E- z
- }
5 h$ Y# a* q. f, X - }: l) i, `3 K2 r. A W: V
- print("Thread end:" + id);
# q% X) v& C2 a' M0 Z; V/ ` j - }
. A8 Q# ?" o# A - let th = new Thread(run, "qiehuan");% v; R: [! p, M" e: N4 r
- th.start(); U5 E _' v6 E9 `6 z
- }
7 R. p }) y# k; p) k- q( M
4 J; x/ ^ |! x" G" l& f, r- function render(ctx, state, entity) {* w l. p* u M% m3 Z4 }4 _
- state.f.tick();( S5 H. G2 G" Z% b) S
- } C3 {/ q+ O1 |
- s1 I4 X- s! Q$ Y' u3 G- function dispose(ctx, state, entity) {9 X u3 J' N$ O6 [7 b- r- v
- print("Dispose");
- l, W4 B" S1 p% X* T1 @& \6 }. G K, h - state.running = false;
9 e6 Z* X" U: P3 V$ b - state.f.close();$ L0 m E! p1 A/ n" u) U1 r
- }
/ J1 j/ S- }' w! y: Z) H- g
. U% |" Y6 ?5 T2 [- function setComp(g, value) {
# ?( T; a5 ?) D" ]9 T0 \' S! H - g.setComposite(AlphaComposite.SrcOver.derive(value)); W8 [- p% @% g, M( @
- }
复制代码 5 q4 j) F" u5 R& E2 l" 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。9 O. v% P5 G r0 T1 R6 _
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$ d: N& |. ^- l! E" j5 E! w顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% a6 [0 c' N# Q+ D
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