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^% Y7 W* y$ {, |9 r% G0 x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。
3 S, l' g, L/ e$ v+ a9 c4 s5 I- importPackage (java.lang);# k# ?5 A: d2 A3 D
- importPackage (java.awt);& x; M7 q8 L9 k# R
( N& V9 ^) m0 A! ]( G6 T. h- include(Resources.id("mtrsteamloco:library/code/face.js"));3 x, O; B, x: r1 k0 `3 r
! q- V& h6 b9 E2 b: s6 K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
# t( F3 {1 a/ h - let frc = Resources.getFontRenderContext();# s& i x# }/ Z" @1 C" ^. I
- bounds = font.getStringBounds(str, frc);, Z6 S) N, p V0 W# p
- return Math.ceil(bounds.getWidth());
5 q( v( e9 c H/ R/ E - }% {4 X) E2 m& G; |; P: I9 \; e5 }) ^
3 n2 h1 a; W' a9 E$ o7 ]7 u5 U" \4 h- da = (g) => {//底图绘制+ E i' |5 q" r! L
- g.setColor(Color.BLACK);' j/ C, L0 X) b) ?5 K
- g.fillRect(0, 0, 400, 400);( x! K0 n/ K% g p4 y1 H- D
- }
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- db = (g) => {//上层绘制
8 |, y) _' ]7 A& q0 Y' x8 P2 U - g.setColor(Color.WHITE);
/ j0 Y' |: |! i& N - g.fillRect(0, 0, 400, 400);6 V- U7 B5 Y0 T _* d# p( i
- g.setColor(Color.RED);1 m6 P; T! z, {& S
- g.setFont(font0);
5 X' S% ~/ I1 |! A: `9 ^ - let str = "晴纱是男娘";
+ u8 a/ @% ?# g5 g6 N - let ww = 400;
% ]4 I M( e, V+ p - let w = getW(str, font0);( r* `* z" f) G7 _8 Z5 k, M
- g.drawString(str, ww / 2 - w / 2, 200);' ?0 {% S& U( Q: I
- }
6 x1 k" d0 Y8 a: V
9 K: j, c/ ~" q5 t$ E" M- const mat = new Matrices();* T0 v7 R* L3 @+ J! [
- mat.translate(0, 0.5, 0);
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Z# G9 L& s5 e0 ^ a8 d- function create(ctx, state, entity) { L! g/ j9 s9 _& g1 i" X$ N% ^& J
- let info = {
4 g& ]' H2 z5 l8 k" H$ O# O - ctx: ctx,
2 N9 A% M: F6 X! `* [7 n$ v - isTrain: false,
0 x: S l {5 E, R: z* r* B/ @ - matrices: [mat],/ b" T" U0 G' w/ o$ l
- texture: [400, 400],2 x1 O3 e: r! m0 q, H& [( H+ I
- model: {: D( T- R, i; F5 x- c7 Q4 }7 @5 I: K
- renderType: "light",
) A4 t* g0 p* `3 ]) y: r/ h7 g2 _ - size: [1, 1],
3 } B/ m3 ]9 O% G6 h - uvSize: [1, 1]
1 C) U, Q5 M% h- V4 Q% }6 [, ~" `% c4 h - }8 U! S% T% E, k
- }
8 n0 r5 a/ u/ w) B - let f = new Face(info);
' g: C% G+ Z# e/ |: [1 g+ T - state.f = f;
# R" ]) n2 d! |" \# A& j. O$ H+ b# V
2 ] e' S' I5 p- let t = f.texture;2 |! A9 a# _* ^; v/ c/ r4 h
- let g = t.graphics;- q& X& U8 O8 @2 t- z; j
- state.running = true;
# z% X& u8 l0 o' v- o. F H; G( Q - let fps = 24;4 U* C* \8 O7 @( d$ L5 c, e0 r
- da(g);//绘制底图) z6 x6 [1 d$ y G: m- a$ m
- t.upload();& D7 t3 q/ s/ I; S
- let k = 0;. e2 Y4 O8 ?% D- e9 z
- let ti = Date.now();
1 e; {. E1 u4 g - let rt = 0;7 _7 g" U P/ w
- smooth = (k, v) => {// 平滑变化( G" ]& E, f. @& Y
- if (v > k) return k;' u- v1 ^; B7 A5 P& I5 h
- if (k < 0) return 0;; e4 e1 @6 F6 D
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, f: e* I4 y2 j1 r" f' |
- }
% C# T* r/ n7 S* x - run = () => {// 新线程
1 M' J* l4 a/ ` - let id = Thread.currentThread().getId();
+ q7 H- |7 c& Z! M+ z$ j* _! b1 S, b - print("Thread start:" + id);
% p0 v( B: H- Z6 q4 g! C. F - while (state.running) {
2 L( S# V9 N8 N - try {
" E/ `7 N5 s. D - k += (Date.now() - ti) / 1000 * 0.2;
6 O0 f1 x9 ]. n$ a3 ~7 ~ - ti = Date.now();
6 D! R5 V) {' d# i - if (k > 1.5) {7 U3 i+ R0 [# C0 E% M7 l
- k = 0;8 U8 g) u$ R6 I6 v; j) O" ]9 p& _
- }. `: t& v' i3 Q+ s% ?: O
- setComp(g, 1);& D$ a: w0 f; y' K9 {' G
- da(g);
6 Y- z- J8 E$ }9 ~" m - let kk = smooth(1, k);//平滑切换透明度
. C# X; d ?5 C( B( `; v - setComp(g, kk);
6 N# i1 S' x/ W) o& F! t! i2 M - db(g);
& ^9 i$ W+ [) R6 i0 p" M4 _ - t.upload();
3 I9 B' t/ Z4 o% k$ m, S$ Q - ctx.setDebugInfo("rt" ,Date.now() - ti);
) F% g# V; g9 A - ctx.setDebugInfo("k", k);
4 F- f5 @. {* a" z/ S - ctx.setDebugInfo("sm", kk);0 @9 R, W$ D+ G% Y: T
- rt = Date.now() - ti;
1 @% d. Z7 q) l9 V0 L$ k0 C - Thread.sleep(ck(rt - 1000 / fps));' h: z- ]+ @5 k7 F s% A! W$ U
- ctx.setDebugInfo("error", 0)
e* h8 n; n! |. |+ W( G( M4 Y - } catch (e) {; E, H# r; C! ^6 M$ y4 ^% t
- ctx.setDebugInfo("error", e);* O% K4 C: Q* O1 q( f& v, w
- }
6 a; c Y( H( \# w1 _4 ~ - }- X3 L# c9 n/ r& d
- print("Thread end:" + id);( m- Q4 \( v; @ e3 B6 Z: ]
- }
: E Q% {' R+ a- b - let th = new Thread(run, "qiehuan");) H- I# S; ^ u
- th.start();2 d: T, S6 Y' e$ I/ R( e3 F
- }
6 I8 z, B7 f# I- W7 N7 W
! N+ i9 ]: W( M8 D5 m- function render(ctx, state, entity) {: y. l0 Q. ~$ o. C) I2 X9 w$ C! F6 l# R1 h
- state.f.tick();5 ?/ ~' Y! C [& A
- }6 ^, W) x; g* X* r" r( n3 U9 q
* c- C. N5 f; v) D' Q) B( r1 ^- function dispose(ctx, state, entity) {
- E( g: Q) O; a4 U" M - print("Dispose");& z# B, r' O$ A/ F/ ~+ D
- state.running = false;; d+ b2 e2 C/ R: q* I
- state.f.close();
- } k& [- l/ ]6 Z - }/ a( H9 S* {* v6 I
- ; u, _1 }- M0 S% ^+ F1 s0 i
- function setComp(g, value) {. }* C9 Q0 e% }% g7 {! i, `* L. m* q
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: P* [8 `1 R& m$ E- @7 n - }
复制代码 & U5 e, l6 W# h) N2 F; X
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)+ H2 B+ k- V4 l& Y8 l5 {
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