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2 {/ T+ n9 F& j) h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。
: Q7 Z# x& Y1 ]- importPackage (java.lang);: r: q7 |3 @# l5 h! l9 u0 C3 S
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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' X2 m3 g3 w, }: C: s( s* Y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
0 B' H9 H" {) I0 b3 j - let frc = Resources.getFontRenderContext();
- J5 Q; T3 w( ` - bounds = font.getStringBounds(str, frc);/ X! ~6 _6 g' n# ~1 F$ W% c/ P
- return Math.ceil(bounds.getWidth());
6 h Q: t# _% f) m" D9 j! u F - }
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- da = (g) => {//底图绘制4 ~7 g1 V3 I; m$ g! d S) t
- g.setColor(Color.BLACK);
- s. B5 S, v' F, ~* |3 b4 w: x - g.fillRect(0, 0, 400, 400);6 a" P6 Y% g/ \; t1 Y4 L
- }
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& Q0 q7 _' T3 h3 R0 k- db = (g) => {//上层绘制- L8 x1 `* v5 g) j$ \4 A9 V" O
- g.setColor(Color.WHITE);
% n' j+ A$ W' _9 [" c - g.fillRect(0, 0, 400, 400);1 Q& N/ U$ ?+ I- B ~1 u* E; W! `; g
- g.setColor(Color.RED);
1 C* u9 J. O q* y - g.setFont(font0);2 K0 p( H; W( ]! V. w+ c) i
- let str = "晴纱是男娘";
3 E4 o) E9 R K M - let ww = 400;
" T4 [1 ^1 P$ K( C' N; X& R! u. z - let w = getW(str, font0);
- F$ A5 I+ ~5 N1 y! v8 O, s2 x$ t6 L - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
! S4 S( H( F2 G+ }1 F - mat.translate(0, 0.5, 0);0 k. i3 V. L& n0 ` |- F
- 0 f+ R8 W( } R( S
- function create(ctx, state, entity) {. P1 q7 x9 e, T+ P# H
- let info = {$ O/ b9 ~- Q: f: r
- ctx: ctx,- `. X5 L9 y: ~5 L
- isTrain: false,
5 ]0 S- ?+ E. r* W4 W; u$ C - matrices: [mat],( O L f( S+ u$ P$ R; h4 G; M
- texture: [400, 400],
- a9 g; L5 {1 x - model: {
- B% e# g4 L2 F% B: X - renderType: "light",
! h5 P: Y4 }* R, U/ J( G - size: [1, 1],
6 }$ K+ U% A/ J - uvSize: [1, 1]
5 _1 @# H6 J; @2 ^ - }
$ Y% n6 v5 U; V0 q$ Y - }
5 S; ^7 f) W3 f - let f = new Face(info);$ b& n5 c! E. v
- state.f = f;# D% E1 l9 e$ v6 p, z
5 V! m3 _0 L( o9 l5 L1 D- let t = f.texture;
2 c2 W2 d, G. W# N; J - let g = t.graphics;
1 v. O$ } i! | O6 z: u/ ~ - state.running = true;$ R( f) h6 V1 p, d1 `2 x
- let fps = 24;6 S b# R$ F- t# t; [: i
- da(g);//绘制底图8 T; G- j5 i# ~. T: a9 D4 G j! ^4 C
- t.upload();
9 s1 E2 i3 Q* s' t6 S# ? - let k = 0;) ?' v3 p5 Y, |
- let ti = Date.now();
# b! a) O% ]. ?- P/ j! X# A - let rt = 0;
- a$ Q' V( {: V8 F& ^) | - smooth = (k, v) => {// 平滑变化
) U& z+ A9 \, `: F - if (v > k) return k;
) m5 N: e/ m0 u1 z, k% r& D - if (k < 0) return 0;0 _: X8 x. M R$ K3 z6 F
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
9 O6 Z6 D6 D8 R" K- I - let id = Thread.currentThread().getId();
9 t K5 Y5 d0 K6 v - print("Thread start:" + id);
+ W: h8 q6 N; ]+ m( w- P! r' k+ r - while (state.running) {/ f& s* e9 W; O- x$ c$ y$ @" j
- try {
3 ^5 z! O- P5 g8 s - k += (Date.now() - ti) / 1000 * 0.2;
7 `2 P5 o# L; n$ v, e5 Y4 x; | X$ i - ti = Date.now();
/ A% s8 @9 a* U - if (k > 1.5) {
# l) `+ |( j. A) b \3 f+ n2 ` - k = 0;7 |% g) V/ {1 p8 {- X( H* u
- }
/ P# G; x1 B2 x* @2 N( |5 [ - setComp(g, 1); S/ r* ]" }% Z' [
- da(g);1 u- o: J3 y% F% f# K k' k7 n
- let kk = smooth(1, k);//平滑切换透明度
3 J# P3 f/ O/ A# v5 k! X - setComp(g, kk);8 y, f( F- J) O% b
- db(g);
( L3 t- T Z' j4 {) y7 w$ w - t.upload();
" G) \! e* u/ e. M+ g - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 M6 \ R7 u( r8 z% r - ctx.setDebugInfo("k", k);
( l; c( O: C2 K% T' ] - ctx.setDebugInfo("sm", kk);/ b% n0 f* ]' M! t L: K7 g
- rt = Date.now() - ti;2 f; L9 A) ^' u- ~+ f
- Thread.sleep(ck(rt - 1000 / fps));
1 I0 J0 ]9 F+ \4 D9 U - ctx.setDebugInfo("error", 0)
9 r, l+ z. D4 C+ B! y. g% _ - } catch (e) {
2 U4 r& D& \% Q - ctx.setDebugInfo("error", e);
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- }
+ M/ `7 o/ Q r; l; s8 s; A - print("Thread end:" + id);. W" ~& a* r+ D0 i. @. ~
- }" b- L5 T4 j, h# F2 h0 e
- let th = new Thread(run, "qiehuan");' X$ I' m* ?# S# {' C: @* W" e
- th.start();( n, P, Z ?4 ]7 R5 V
- }/ u v$ N! {9 V3 Y1 M) u# H
- 3 z1 ?2 r1 R: E0 I% t: M; m
- function render(ctx, state, entity) {
& D. m# s" T! C- Y - state.f.tick();/ h, p4 L- o* i0 e, S+ w, w
- }
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- function dispose(ctx, state, entity) {7 w3 E; l1 ~$ o! G- t
- print("Dispose");; D4 n% i4 o) @! ^
- state.running = false;3 m; z; z8 Q: t* K+ q/ q r
- state.f.close();
- }5 y6 d/ D9 q3 `) h) G3 w. Q8 E - }
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- function setComp(g, value) {" P, Y3 W7 f( G6 G! K
- g.setComposite(AlphaComposite.SrcOver.derive(value));# ~1 ^. ^5 F5 i4 g
- }
复制代码 ( I7 @5 \+ E& `' ]# w
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。, b2 k7 W% h2 i) }" D
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0 _0 s3 g9 z5 o# Q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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