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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 u, t1 z$ g9 A. l5 R6 q, X
- importPackage (java.lang);
, @9 M( {) t: z+ W: F' V - importPackage (java.awt);# T) \! n8 P. {
7 s% v* K4 t4 E [ a$ h, A- include(Resources.id("mtrsteamloco:library/code/face.js"));) [" V( H0 I6 M2 M5 g( W9 [1 q" ?
- ) w/ C& ]0 Q) k* Q' _
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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3 B' [' }+ v" H U# z+ J2 ^; V- function getW(str, font) {
! I$ O% r2 R9 ^4 e s - let frc = Resources.getFontRenderContext();' u. `# V9 b" x( ^- i! t& v7 r
- bounds = font.getStringBounds(str, frc);
6 _5 w& K7 d! O* _# U' R8 U1 p& m - return Math.ceil(bounds.getWidth());
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- da = (g) => {//底图绘制
I( m. [2 _& [$ J) m% r - g.setColor(Color.BLACK);2 U! B% W" Z* `# \" K5 O f, a
- g.fillRect(0, 0, 400, 400);6 d' O3 ?4 k, U4 ?8 ]
- }# W* [$ z/ Z# `* y) @4 t
- 7 g6 i% a2 k6 o5 I" \/ p: Q" ^0 v
- db = (g) => {//上层绘制 _ Q; S1 E' |3 `
- g.setColor(Color.WHITE);
7 u# @9 [; L9 v4 {5 e8 E* O - g.fillRect(0, 0, 400, 400);( _: j3 I6 I7 [* P8 d
- g.setColor(Color.RED);4 v! L* n( O2 `* O9 b& G& V
- g.setFont(font0);
6 s" j5 M; G" B! k - let str = "晴纱是男娘";
8 M6 `& T+ A" F$ A5 z" Z. ` - let ww = 400;
' o+ m. I Y5 H3 t* u9 M - let w = getW(str, font0);
( _# J% C6 E0 l/ g - g.drawString(str, ww / 2 - w / 2, 200);* w3 m+ L: \6 X' W) g3 h) I
- }
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; e/ Z$ {6 U" O( z1 H" m- const mat = new Matrices(); X6 Y7 @, E9 f: ^5 ]5 o# U% o
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {" ?; ^- D! C& R7 s( }
- let info = {" y. c3 e5 a& p, a% y d0 l
- ctx: ctx,
# |' f, u8 `7 b# g; h6 k4 F6 f; q - isTrain: false,3 w# X2 g+ s) O$ m
- matrices: [mat],' w' h- O: |! n- z) ~
- texture: [400, 400],
1 e3 ]& R, w% q, ?$ l) @0 t4 G - model: {
0 b% n1 ?, t3 G: M0 I; `' w+ f; e - renderType: "light"," J; R) V+ L$ B' b" T
- size: [1, 1],
8 j8 l( _: G, z' D; W - uvSize: [1, 1]
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- }
% f- d& R2 X( q0 w3 ^( a! O, a H - let f = new Face(info);
8 q+ F! N* @& n. S& R+ S$ w G+ ` - state.f = f;
* @" c" m# U7 A
* K- [, n, m' t1 [# @. x- let t = f.texture;+ o. f1 y* b% p+ u/ M, y
- let g = t.graphics;
- [" r- Z- V0 H/ Y% x( q - state.running = true;
! s3 r' Y" I" Q9 L! b4 p - let fps = 24;7 w/ J a8 V: ]. |' O1 G
- da(g);//绘制底图: \) P' a2 z: S+ i. h* o
- t.upload();
, B$ n6 I& J4 y: z& J6 ] - let k = 0; O8 K' R& x. M7 t4 Z
- let ti = Date.now();0 I9 ~8 Z. q& q0 [
- let rt = 0;( g5 G/ ?( H0 O+ I% x; F
- smooth = (k, v) => {// 平滑变化
. r( G2 H8 R# W* }: r2 D3 T" J$ a - if (v > k) return k;8 y4 p+ p! B w/ @$ I T5 d; S
- if (k < 0) return 0;
/ F! `$ M( W: I9 o2 L8 l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* c$ w7 F- M5 e4 T1 k - }
3 Z) J# c! m7 G9 B! T3 H: U" a - run = () => {// 新线程
+ W2 a' u& Z4 U ^7 H5 ` - let id = Thread.currentThread().getId();& b) C% X/ H- [. L% [
- print("Thread start:" + id);# C, G7 x! ]' K* x" D6 Y+ L
- while (state.running) {
. h2 J7 B, p( O- T - try {: `% b# p) L5 C5 m% b
- k += (Date.now() - ti) / 1000 * 0.2;3 E( B1 l9 X8 }) c: @1 ?
- ti = Date.now();
6 t4 Q5 P( I( h3 q" t" G6 y, F - if (k > 1.5) {" y/ P' J: P% G% Z1 k ]
- k = 0;- r" `( p8 F4 ]& E
- }4 I q0 o" C' V/ ]& s
- setComp(g, 1);8 g+ P/ w+ T& }
- da(g);! G" M( g: B% s7 j/ R' E
- let kk = smooth(1, k);//平滑切换透明度
+ j3 j' c _- u& f% b3 H: G5 v - setComp(g, kk);
' W( @9 u4 d6 L2 j6 s- t( Y - db(g);6 k% B! p1 t- p5 z/ t1 [. ?
- t.upload();1 C6 U1 K- u5 x: R
- ctx.setDebugInfo("rt" ,Date.now() - ti);
# `4 b8 |3 I/ v4 F% p1 a& C - ctx.setDebugInfo("k", k);
$ @( c7 X- L7 Q5 i w) ]% V1 P - ctx.setDebugInfo("sm", kk);2 X1 ?3 w. A+ S4 J3 b1 L9 }! v" J
- rt = Date.now() - ti;$ L+ J- S m% S$ L0 \+ _0 ?
- Thread.sleep(ck(rt - 1000 / fps));' F- V' E$ m/ d+ S! [
- ctx.setDebugInfo("error", 0)
0 \+ K d$ w4 M+ v - } catch (e) {
+ B3 H) v; I0 l( n1 o: ] - ctx.setDebugInfo("error", e);
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- }
1 J# t; J# G# F/ _ - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");% W. B1 Q6 E1 `6 ~0 F4 F
- th.start();
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- function render(ctx, state, entity) {3 {1 e- {; l( n3 D; @2 e7 V: U
- state.f.tick();. y: _# `) e9 C* H+ y
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- 4 H3 m) \+ g( M& D) H* u4 d
- function dispose(ctx, state, entity) {- Y: [8 N! [3 d7 f" D
- print("Dispose");5 W: q% s" O& |9 G
- state.running = false;
& ?8 h. S! S7 {* `6 }. D - state.f.close();
& T& I2 j. c8 O( B8 V - }
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- function setComp(g, value) {
% d# B: v4 N5 C2 r - g.setComposite(AlphaComposite.SrcOver.derive(value));" m5 S' C, y, B
- }
复制代码 + n7 z n1 u% m# {
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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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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