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: g) H& }6 Z- O5 T: i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。
! d1 w& H# [* L5 u6 }- importPackage (java.lang);# l) o9 Q- A4 g+ v
- importPackage (java.awt);
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) o- l2 _ V, h( t" E( @- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
' [6 q% j* g: T) \( p
' h" @8 b: b' n, f$ A' a- function getW(str, font) {' ?1 U; u3 X8 k/ w: _3 D+ A4 Y) _
- let frc = Resources.getFontRenderContext();# [' A2 E$ l, S/ _0 J
- bounds = font.getStringBounds(str, frc);* \# \( n- e3 k" L6 x
- return Math.ceil(bounds.getWidth());9 g$ |( x. l9 N5 y
- }( r$ C+ o6 |& B
9 G4 x' J- J/ p( g; o3 d( O- da = (g) => {//底图绘制# N& N5 k/ Q7 \0 I! z4 z# V
- g.setColor(Color.BLACK);2 \, w8 J' s: n' B# m
- g.fillRect(0, 0, 400, 400);
$ B& P: |1 B# ^1 S - }
8 X6 ~6 D- s/ h) ?
4 ?+ }' Q4 d, P+ V- db = (g) => {//上层绘制( x |7 i x3 f- A
- g.setColor(Color.WHITE);8 p( B- J. n& ]5 \8 u
- g.fillRect(0, 0, 400, 400);
* A$ }; |! U$ E' q) O2 q5 u' w - g.setColor(Color.RED);/ x( ]! g* @$ z4 O x. B5 m
- g.setFont(font0);
+ A4 |7 M5 a) t* a% n! a' \& v - let str = "晴纱是男娘";( s6 z( e3 Q2 Y% F8 v ^
- let ww = 400;
. p1 D! o% e9 \/ T% O: g# G, N/ w - let w = getW(str, font0);
: q* {& D9 [/ x% G I+ t+ q - g.drawString(str, ww / 2 - w / 2, 200);: y1 `% j" ?, `4 h8 D. {
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- / s. n1 ^5 g' z$ U! T
- const mat = new Matrices();. K* q b5 s0 c6 w
- mat.translate(0, 0.5, 0);
F: ~1 m+ R: c- W7 @
& K2 |( o! f% {+ T/ \7 H# o- function create(ctx, state, entity) {7 ? s5 H5 ?. k( @! h+ F
- let info = {( d1 P8 ^' j5 ~& s/ G4 |
- ctx: ctx,
1 L/ h g& V% N# Z) A) Y - isTrain: false,3 ]* f7 m) V: f0 l. z) g
- matrices: [mat],
0 f9 Z @- _9 v. P. Y - texture: [400, 400],& S9 x/ s I5 o: c( Z4 I8 e+ u" @6 A
- model: {
6 Z2 }7 `2 ~: @0 M3 U9 n - renderType: "light",
2 j9 [# _( F5 S - size: [1, 1],' c/ X1 @/ S# O$ R
- uvSize: [1, 1]
0 ^5 _+ J. R }; b - }# ]# ?& K& j5 |3 i
- }
5 u& a7 u# K# z! \2 v - let f = new Face(info);
7 n: q0 d. c$ L. _) ~ - state.f = f;
1 c4 g0 C% U) G
% }; f4 n% F( W; j0 I& }- let t = f.texture;8 n$ m0 }1 }' Y% [
- let g = t.graphics;
8 Y4 B' a3 s8 ]* ]. [ - state.running = true;
' D5 ~. X1 _. P& }6 z0 Q% b - let fps = 24;
, { t2 a% G8 k) V/ T* Q- L- \ - da(g);//绘制底图$ S0 F& L& S( g/ }* h" ~/ O# B3 h
- t.upload(); V7 P, G: _) B( q6 A. m- A$ j9 g
- let k = 0;
/ Y b; S* N% N - let ti = Date.now();
8 {$ ~2 s8 X" Z - let rt = 0;7 c0 X! {2 U/ h
- smooth = (k, v) => {// 平滑变化7 A. q; \( F& y7 N* Z0 O. K& i( c R
- if (v > k) return k;0 i8 g& ^. t% P4 p6 Q' J# q
- if (k < 0) return 0;
5 ] j' \% Q4 I: Z6 J - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* U% e1 p' ]2 X9 R
- }: `! _5 W; C P
- run = () => {// 新线程
$ F: e v' p B( A# j6 C! } - let id = Thread.currentThread().getId();
D1 Y+ d& g4 n1 i: W1 H) m( z9 v - print("Thread start:" + id);# Y9 N& V, O3 s- P! d
- while (state.running) {. T! K( [6 S' R2 \
- try {& I8 ]/ w1 `! c
- k += (Date.now() - ti) / 1000 * 0.2;# F2 Q6 H( g' ?9 g
- ti = Date.now();% q% q2 M6 s/ B6 c7 n- u+ h
- if (k > 1.5) {
/ Y; @. T) G/ b - k = 0;
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- setComp(g, 1);
1 g4 t% Y& d0 K' t, T - da(g);
! Z2 H/ h. z7 v9 ] - let kk = smooth(1, k);//平滑切换透明度- N$ ~+ [* W9 S5 c
- setComp(g, kk);
8 s7 h# g; a; X% p - db(g);
e) A( P- [4 b' p2 } - t.upload();
( w2 t3 J1 r: p8 [( c, k) p" | - ctx.setDebugInfo("rt" ,Date.now() - ti);
0 v2 Y8 t; U3 I. Q( ^ - ctx.setDebugInfo("k", k);
7 U2 g: n8 y# ?* W6 U* E6 H. Q. m - ctx.setDebugInfo("sm", kk);; _3 e0 D# `4 K" {
- rt = Date.now() - ti;3 T, v. U4 y& S# \
- Thread.sleep(ck(rt - 1000 / fps));+ u, u) Q% S; g, ~2 }1 G
- ctx.setDebugInfo("error", 0)+ D# O3 k/ @3 v I1 n8 g) Q+ g6 k
- } catch (e) {
+ w4 t7 ?7 |8 C) P+ L9 Q* Y9 y - ctx.setDebugInfo("error", e);
& n1 R8 F! c. [7 D' S - }
9 I" ]7 v9 s: J: b6 }+ o$ `2 K6 X - }7 K I: n6 w% @& Y, @8 X
- print("Thread end:" + id);
+ F& w5 r" [8 j4 `: e5 n/ R$ ^ - }
* B$ i% t2 K% a - let th = new Thread(run, "qiehuan");: A+ ~ ]8 ~7 [/ j
- th.start();* `" F6 b% h& u7 C' W" [$ F
- }$ [6 Z% i ?* R* v7 e8 z. U
0 y& B1 W. n( r D. X8 X- function render(ctx, state, entity) {
7 _+ Y" S. Z1 g - state.f.tick();# X' z* |" {/ L/ |" i, ^, x) [
- }% Z: Q9 p. d5 ~# j) V$ H. x) K
- + T7 X$ Y" E0 t% i. b
- function dispose(ctx, state, entity) {
- R, W. l- _5 _! d& x# s: @* a - print("Dispose");8 ^, c( r' F6 g2 c) m: E' W
- state.running = false;% W, L; }9 z1 D3 H4 ^, t: c9 _ K
- state.f.close();
5 v L6 c. P7 _ - }
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- function setComp(g, value) {
! ]/ j7 ] U% \6 y- Q# O1 q7 | - g.setComposite(AlphaComposite.SrcOver.derive(value));9 d; q. {; |# `$ i
- }
复制代码
6 K( n' G, M- c1 S% u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。) {( U9 P& o8 a' E
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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)2 {% `2 E) Q' ]$ T: I
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