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. ~ y' ~ j% x# |( g4 R1 V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。! n# o3 ~. I3 B% _. A
- importPackage (java.lang);
) ?" F: J; b3 w% J - importPackage (java.awt);1 L3 D2 R! f1 H1 M& G
- + X i2 b0 i9 q2 j7 M# k0 h
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( x1 ] t" K, N5 ]8 Y/ b) K6 u2 X$ C8 i* f
- 5 |; `: ?/ ?/ y. t$ w/ [
- function getW(str, font) {
5 D; q8 N8 B+ A7 O - let frc = Resources.getFontRenderContext();2 }' X7 L$ K* W, ~
- bounds = font.getStringBounds(str, frc);9 ?9 r# S* |2 ?; n% \
- return Math.ceil(bounds.getWidth());
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/ L/ q! p: D! c3 y- da = (g) => {//底图绘制$ a1 Z/ U+ D9 v: c' X
- g.setColor(Color.BLACK);9 I% r% i( K, k/ v6 @6 w
- g.fillRect(0, 0, 400, 400);
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- 6 Y8 Y) `6 O+ E3 p- I. W, _8 x" W
- db = (g) => {//上层绘制
& u4 I; U; K5 N; t5 t% s0 V - g.setColor(Color.WHITE);$ E* r$ q: ^9 }: O) Q, g% `+ M0 V
- g.fillRect(0, 0, 400, 400);
: [- b. [ J0 U+ i) G8 i, q$ r2 V - g.setColor(Color.RED);
$ S8 Y4 u& f! a1 d( ] a - g.setFont(font0);
4 E+ X% |: m9 o% \: b - let str = "晴纱是男娘";7 ?: ~5 u1 P1 ~# D, }% Z" S9 t
- let ww = 400;
4 J( X- \' k: o/ m M$ _1 ] - let w = getW(str, font0);
0 u8 f: M5 r' G: }6 o% s8 v) z - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();$ ^/ q# ]4 U- Q, ?& z* G
- mat.translate(0, 0.5, 0);5 l, c, S2 h2 a, U
+ m) Q( y# I$ Q w( _- function create(ctx, state, entity) {
: Z. b+ n: [8 G: d( A+ ~ - let info = {
0 L3 F' s% e1 W1 W6 t5 j. C - ctx: ctx," x. ?. Y; b2 O
- isTrain: false,6 h7 k( {- W" Q5 ?# r* d
- matrices: [mat],
' u v( d4 o$ T - texture: [400, 400],
5 d" n2 n/ k! z - model: {
7 j( Z" h3 `% c3 u5 D! e - renderType: "light",
4 h8 T( p0 j6 x6 g! k6 F - size: [1, 1],' a/ ]0 }9 E+ ?
- uvSize: [1, 1]+ S4 P- H- Y9 N `$ h
- }$ k4 ~; B6 j- i9 a. X7 ^" k8 {
- }
' j( b- o/ h% L - let f = new Face(info);
% A# X. n0 {7 J$ [+ D - state.f = f;
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- let t = f.texture;
0 B! t4 y" {: D ]9 \- G( N - let g = t.graphics;, H: H3 d2 Y T1 K
- state.running = true;
- u, I2 m1 D9 b0 G( R% o - let fps = 24;' O9 V" }$ C( L3 h! g
- da(g);//绘制底图
, M3 h- M- y/ G - t.upload();: ] ~- g8 B3 H3 V% L! @0 f+ x
- let k = 0;# V9 N5 }. z! x, H5 }, L
- let ti = Date.now();
, g6 E, o# r# d' D3 V - let rt = 0;
5 m. p% W& [# i, S) B( r, G - smooth = (k, v) => {// 平滑变化7 x6 b; s5 w+ P) X
- if (v > k) return k;
2 C5 W8 r. [, a6 y; ?* N; i - if (k < 0) return 0;
% W, Y/ P% s' d* M. x6 T* e, l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. J( M# B! Z9 N. t
- }. c! @- O( j/ S: ~" c. B
- run = () => {// 新线程
m' Q1 {( T5 y- e9 @ - let id = Thread.currentThread().getId();) _, H& v2 C9 y2 [
- print("Thread start:" + id);# ]. c0 [% F; f
- while (state.running) {: w Y$ S# X4 l6 o* A$ f. R$ I% U
- try {
5 m1 Z3 a q: J5 }: f - k += (Date.now() - ti) / 1000 * 0.2;
2 H( t5 k8 ]( M8 Q: C6 @ - ti = Date.now();
: W" D& F* U9 H6 q# @ - if (k > 1.5) {
. ^8 o: D* j6 a" V1 G - k = 0;; p0 G! s1 t. Y$ B9 d) |
- }0 ]+ w& K& L) \0 u' _. I9 }
- setComp(g, 1);
. R! R3 G# f3 e# P - da(g);
& v( }# O: D9 ^& [' L - let kk = smooth(1, k);//平滑切换透明度6 w) ]; M7 l# J. ~% q
- setComp(g, kk);2 \4 z* r! ` u' G
- db(g);
3 f; {, ?5 t; T' S - t.upload();
3 L% f/ i+ O2 _% K - ctx.setDebugInfo("rt" ,Date.now() - ti);
% c6 t: V$ Q4 E) b. s/ u$ D - ctx.setDebugInfo("k", k);
$ X/ B4 R; g. ~" G - ctx.setDebugInfo("sm", kk);0 Q' {" |: Y/ G y& `
- rt = Date.now() - ti;
1 [% W1 m6 k! a5 i9 z J - Thread.sleep(ck(rt - 1000 / fps));8 W" ~ z6 i1 p- ]
- ctx.setDebugInfo("error", 0)0 ~9 R7 B" Y: V& _7 m, i+ S* B: w
- } catch (e) {
0 `9 D; x I1 N& N* t - ctx.setDebugInfo("error", e);
0 \, P$ l( {! h0 W - }7 H0 C: \" O( k2 W
- }; }; Y8 v. X6 E. n l
- print("Thread end:" + id);# J% O D" Q( H; D" A: j+ h
- }" r+ }# T4 y! ?4 K
- let th = new Thread(run, "qiehuan");
. j& O- d" K& Y2 ? - th.start();* P ?( P# r* N7 ^
- }) o2 B" v* n3 R- q# |
3 T3 e O1 b' G% R D- function render(ctx, state, entity) {7 l& w) K1 Z" W" e) g
- state.f.tick();2 u9 F+ g+ t( A4 E
- }6 j6 |) N% r4 N' u$ i' C
) T! `" Q8 X' l- function dispose(ctx, state, entity) {
/ S2 K5 o# D4 I - print("Dispose");( k) Q0 p/ ^! T# R
- state.running = false;0 \& h# R8 n2 e; S
- state.f.close();! d5 W1 O% ]# N. P
- }
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- function setComp(g, value) {5 o; B6 w& P1 \- y% t" P
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 J' l7 M/ L: A. l4 s& a& d4 X
- }
复制代码
# z7 Y" j" W3 G7 }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。. c6 d1 W/ u/ P1 ^* }" h: o
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$ {% ~5 |" B. t+ A+ r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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