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+ _7 S, Y, G" C2 w+ }( F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。6 ]+ v! Y' {# u4 Q$ d: d
- importPackage (java.lang);6 i, E% X. \$ a ?
- importPackage (java.awt);3 p* t8 W+ H0 o& Y' A m3 k" p9 e
- D, H% F1 m/ V& C$ |- 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) {$ }2 f: k! C% E3 B" n6 A: D
- let frc = Resources.getFontRenderContext();" L; ~( Q8 J! h: n$ ]' ~; U" Y
- bounds = font.getStringBounds(str, frc);
. ?# ^( i y+ X9 W4 r4 u1 x - return Math.ceil(bounds.getWidth());! q1 R' @) Q: }7 s. K/ y( o: l9 H
- }* s, H x' C/ J1 `$ ?- d7 \! ~
- 6 f7 t: l/ S: K! b7 d2 [; @
- da = (g) => {//底图绘制
4 Z5 w8 V) u! a2 d- t0 [: V - g.setColor(Color.BLACK);
+ v( \9 ~1 v$ z - g.fillRect(0, 0, 400, 400);
1 E" E$ [/ I$ d$ {9 a8 F8 B9 ] - }
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- db = (g) => {//上层绘制! t5 s4 P! o2 f4 x+ W
- g.setColor(Color.WHITE);
& A, j7 s; F0 s - g.fillRect(0, 0, 400, 400);' i1 q- \2 U+ D) R% L8 s2 W
- g.setColor(Color.RED);
# e5 Y+ U/ K9 ] - g.setFont(font0);
5 g- ]4 |7 @/ v! F' k& u' E - let str = "晴纱是男娘";
& M/ A- u+ _& c+ P - let ww = 400;5 z0 m: O$ P# P2 ]6 Z) V
- let w = getW(str, font0);
, V# ~6 F! m; p5 @- |5 | - g.drawString(str, ww / 2 - w / 2, 200);
! m" A) I$ r/ W7 K6 I; g+ u7 M. K - }
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- const mat = new Matrices();2 A# u) g$ H+ w; i* ]
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
% ?$ B+ f% k1 D" E! L4 N9 B7 @ - let info = {
( k* N( i" ]5 `! `3 Z2 @ - ctx: ctx,
' Z1 Y2 B& w$ M; i' q* n - isTrain: false,6 H% L; o& o4 t: `5 `
- matrices: [mat],
1 N9 z" M: F; e7 _5 w - texture: [400, 400],, J. Z! n7 w) ~! y' f
- model: {
; B: _: r$ H$ b6 G. ?9 { - renderType: "light",
8 P' \6 }& i! b1 M: t4 P5 e - size: [1, 1]," O) a ]7 X5 y0 w% U; [/ h/ q V
- uvSize: [1, 1]
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- }) K8 \" J3 o4 [ c/ {: I: b/ Q
- let f = new Face(info);8 m3 V9 P# c: R8 a2 R3 R' v
- state.f = f;
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- let t = f.texture;
, M5 \2 \; c" S& @. b3 A - let g = t.graphics;
y+ C( A; h, C) C! V - state.running = true;
& m" d* ]0 C j8 K- o- k4 I" b - let fps = 24;
+ U% |! i; {: M- ] w) c N4 W - da(g);//绘制底图% a( {# n0 B; @% ]' V( D
- t.upload();! }/ r0 Q- j1 N- ~
- let k = 0;
4 Z2 }0 }) x1 b, i6 f; R - let ti = Date.now();
. a# p/ c2 t1 b9 P5 l - let rt = 0;
* m$ n. p7 [+ I, I - smooth = (k, v) => {// 平滑变化
) U7 W, N; p0 ^ - if (v > k) return k;
6 Y0 C7 u* o P - if (k < 0) return 0;; T, g6 \& _' z* X( Y, V9 E2 i
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程7 I( ^. F6 T' W+ }. |9 m) _
- let id = Thread.currentThread().getId();: e% O/ Z4 I2 v4 [: j' h
- print("Thread start:" + id);/ H' S+ L8 F) Q
- while (state.running) {
- t- ^- J j- y% ]2 u0 i* |9 R - try {
7 }0 ?! o; ]! x7 ~, s) Z) {' S/ P - k += (Date.now() - ti) / 1000 * 0.2;9 ^8 c. _+ m2 k( r9 n
- ti = Date.now();/ T; l5 c: J {* X% q; k. X1 O
- if (k > 1.5) {
) C: _7 d; T: r$ V - k = 0;
9 }* J. f5 d6 c- x9 J% a - }
/ L2 m) ]$ ^" }0 D: u - setComp(g, 1);
/ @, j4 @) P' K - da(g);/ |4 G# k4 p/ k) r. P/ d7 F
- let kk = smooth(1, k);//平滑切换透明度# D: y( {$ r8 O$ f' w9 i8 z+ I2 e
- setComp(g, kk);$ x1 `: I( I+ H8 j: @/ j
- db(g);
3 q3 Q* X' L6 M I# g - t.upload();
$ x) N/ m. r/ p, x- J, } - ctx.setDebugInfo("rt" ,Date.now() - ti);
( V2 l7 l9 A7 k5 Q' o( C' ~1 R - ctx.setDebugInfo("k", k);' M. q5 M# w; s/ K9 n6 O$ H
- ctx.setDebugInfo("sm", kk);
$ @# c+ M% K. r" @: l; E( y9 M - rt = Date.now() - ti;
0 m- W8 e: t3 e6 c3 p - Thread.sleep(ck(rt - 1000 / fps));
& t2 {) L2 j. r$ b - ctx.setDebugInfo("error", 0) O" k; [! i4 F3 _$ G( N
- } catch (e) {
, x5 r: T4 A9 \1 P - ctx.setDebugInfo("error", e);- ~0 h) x s( J0 D) u
- }
& o& d6 X3 N% {( I) G - }
E: r" _8 {1 ~7 p* z& F - print("Thread end:" + id);0 d; n& R& K2 X1 g
- }
) K$ O8 V* J' @( W( t$ ^9 i - let th = new Thread(run, "qiehuan");
8 G3 s1 ?5 S3 ~3 O" T! X - th.start();
* R9 e Z& g" T$ _# d - }
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& P/ m; X8 ~1 s/ U2 `: ~2 [$ ^* S- function render(ctx, state, entity) {3 B0 W9 ]4 a, H$ B) P! f% L1 y
- state.f.tick();6 F: W( G% I _% b5 z# P! q# H
- } c5 C5 ~, ?' k7 H2 O0 a0 M
- 0 S @# Z A6 g; p2 p' h
- function dispose(ctx, state, entity) {
$ ~$ K: I% i9 F5 Z* E, @$ C - print("Dispose");& O% q, R$ m9 L2 e0 J. l3 j
- state.running = false;' R% _) [/ o8 p8 `6 t
- state.f.close();: c7 ^, z# r+ n
- }6 |* K% l& s8 l: ~+ S
* i. z/ C ]. e' ]- function setComp(g, value) {1 v) R8 x3 r1 h" x% v( o
- g.setComposite(AlphaComposite.SrcOver.derive(value));- y) O( B0 p# U8 ?- n, d
- }
复制代码
6 `# T0 ~7 l! a" p1 z, h5 h I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。
0 J# N, S' Y7 L' N/ H) l# x/ o& [: n5 J! ~8 N! G
3 t( G$ [( S g顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# b. a7 M) R. D( F
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