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8 K% G# q% P% Z. U/ G3 y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。* _' h* a$ Z$ A9 H! V/ D
- importPackage (java.lang);7 m; a' m# M( ~% x
- 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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+ R' p. K, W1 l% g; D; f. Z- F' ?& O- function getW(str, font) {6 P9 M* I( S& @: Y" p+ f( i$ v+ b
- let frc = Resources.getFontRenderContext();5 X- x! {- p; Q" x6 p5 p% A$ s
- bounds = font.getStringBounds(str, frc);# N1 T0 y. x- a6 u1 l! v g8 B
- return Math.ceil(bounds.getWidth());
% [4 F2 b: _# \$ \$ a3 p5 n* D - }
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- da = (g) => {//底图绘制2 t* b" I: s1 n/ |/ T
- g.setColor(Color.BLACK);# \/ G1 d P. x, X. ~' \' X
- g.fillRect(0, 0, 400, 400);
/ V+ p, k% M' E" E9 a t - }
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! `; |, i) P# q9 s+ a- db = (g) => {//上层绘制
4 P& ^" ^* l4 m - g.setColor(Color.WHITE);
* P L S: ~. O/ H0 H( o - g.fillRect(0, 0, 400, 400);
# j5 O1 f* v8 S. t+ e - g.setColor(Color.RED);" `- K' W _3 R y& z) B9 M
- g.setFont(font0);; `. j! \3 c W. N/ ^1 {
- let str = "晴纱是男娘";
* D4 V% q" _0 k$ n2 [' b - let ww = 400;9 e; T8 K! |/ v. N
- let w = getW(str, font0);
. b) A" I2 G2 g1 s - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
9 V5 v, T! I! T6 z$ R9 p - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {$ G( m6 H' w. o- \( f
- let info = {
- E& I. E4 q; z N# S% y - ctx: ctx,/ X. {; Y7 x( o( E
- isTrain: false,' J C6 _) j* ]) f0 H5 a/ w
- matrices: [mat],$ r4 e/ F2 z+ z
- texture: [400, 400],- P$ S9 x; g3 x) Y
- model: {
4 p5 a9 @. r/ T0 q6 y7 f+ Y; r1 @ - renderType: "light",. E2 R- a. k8 ]+ Z! @5 @/ `
- size: [1, 1],0 y9 d8 e' N, N5 f& q+ ]7 e
- uvSize: [1, 1]! g; S! W( F% T0 b; H b
- }
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- let f = new Face(info);
# p1 U2 U0 Z* h+ l* U( i% Q - state.f = f;
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- let t = f.texture;2 l7 O |7 w5 r, _
- let g = t.graphics;
# _7 }, E$ b, g9 d6 r# M$ | - state.running = true;, T$ C$ k5 b( p! Y
- let fps = 24;. U5 {$ B0 [, U! D; x0 N
- da(g);//绘制底图" Q7 ?' E* Y" E5 d* a$ j
- t.upload(); }% E- F! ~6 i
- let k = 0;. `: c Q1 i2 Y' S5 I
- let ti = Date.now();
- O4 x! S: f% k7 e* B8 E% K! s - let rt = 0;
: V% p& H4 S1 |0 Q9 u. ?2 w - smooth = (k, v) => {// 平滑变化
4 f5 W& L/ h6 o% [7 ?, L! Z$ L - if (v > k) return k;+ k V9 S" V) }
- if (k < 0) return 0;
" O8 W# G% e* f, L1 g+ ?- {8 F - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 D5 T% X9 Q: ~; V - }
! P1 k i e! C% Q# P b0 p1 P% r - run = () => {// 新线程; P1 S' R4 R) R. T5 K
- let id = Thread.currentThread().getId();" d, N( h0 G3 q' _6 T. v
- print("Thread start:" + id);9 m" Y8 Z% [( L" b$ ~% A
- while (state.running) { Z5 w2 p) w# M% j n [
- try {
3 a% m [& C$ k% Z# U+ u$ h3 b - k += (Date.now() - ti) / 1000 * 0.2;- |' Q) @2 r5 N2 s: ~+ L- h
- ti = Date.now();8 x4 v. a( T9 Z) |4 f' g0 {
- if (k > 1.5) { n$ _4 Q7 J8 t. ~
- k = 0;" ?, s4 J1 m3 `3 Q5 z' g
- }& {) `+ r/ v3 L; O; ?8 a( r
- setComp(g, 1);, }4 ?7 n7 E, P: v. q
- da(g);
, L6 `/ y" J7 [# n - let kk = smooth(1, k);//平滑切换透明度
% S( J! T3 ?9 L - setComp(g, kk);
' J/ m0 H0 Y) D5 j& {) b. o - db(g);
, q% I- T4 G0 y - t.upload();
5 q+ m( n; ^7 l- b. y/ M X - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 z! E7 M- C* `1 d - ctx.setDebugInfo("k", k);- p3 ^, t7 B2 o! u( ]" B
- ctx.setDebugInfo("sm", kk);
% T7 P4 R- Q& @) U; J - rt = Date.now() - ti;+ ^0 y" {9 n6 o- Z, h, ^9 X
- Thread.sleep(ck(rt - 1000 / fps));
+ d( b- h r1 X0 K* Q - ctx.setDebugInfo("error", 0). p5 o1 r) h- x
- } catch (e) {7 J. {# X7 e8 u6 c7 G7 w
- ctx.setDebugInfo("error", e);& a h s& Z; H
- }
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- print("Thread end:" + id);9 G* @0 o. E1 {1 O V
- }
/ N9 V1 ]' _: ?" X - let th = new Thread(run, "qiehuan");
: I E8 Z8 P, D' O2 G! Z2 F! a - th.start();
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- function render(ctx, state, entity) {' ^5 l. v8 g8 |7 [4 t
- state.f.tick();
0 q i, ~6 k8 `- @# u' |$ o - }
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( n3 r3 D) s" Y4 t, ^- function dispose(ctx, state, entity) {
7 _; v+ R1 S3 |7 e - print("Dispose");/ h# t1 `, L$ B# Y- u# M+ x
- state.running = false;
' A/ k* M# u! h) s - state.f.close();
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- function setComp(g, value) {6 E& X; k6 a( D& d
- g.setComposite(AlphaComposite.SrcOver.derive(value));8 ^; ?8 T0 Z/ H* {2 k* v
- }
复制代码 : u/ c L }1 G! K4 _
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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" X1 S- G; J/ l$ E9 a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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