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: Y0 _! e) M9 C9 d% d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 B1 m P9 {0 |0 M2 j* E2 B- importPackage (java.lang);8 m$ c. _3 X! A$ E
- importPackage (java.awt);& p# V: M* h9 F, |9 [: `) w+ @. J
- # a! O' @8 [4 r/ K( k# t& f0 h
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); b2 A- L) ?# w& ^% d7 U
7 S6 Z+ ` j" Q' |- function getW(str, font) {6 ?( Y, X- E# V% j6 V
- let frc = Resources.getFontRenderContext();
1 L% [. R' U. \$ K- f7 n! p3 D - bounds = font.getStringBounds(str, frc);
6 d5 a w4 _' e+ V - return Math.ceil(bounds.getWidth());
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- 2 h% g2 F5 C: L! h' U1 |/ O
- da = (g) => {//底图绘制. N: A. ^2 c Z8 p- ?1 z
- g.setColor(Color.BLACK);
9 K+ B: H8 N y8 g5 ^ - g.fillRect(0, 0, 400, 400);
- A( R: @: L* a5 n - }
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$ x' M) J4 D% h# V- db = (g) => {//上层绘制! V& i9 J% Q, P: S; |
- g.setColor(Color.WHITE);# d5 i C9 v$ O" Q! r7 N7 p
- g.fillRect(0, 0, 400, 400);
0 y0 T2 s4 v7 C" K! G+ ^- K: S - g.setColor(Color.RED);
! r; x+ z& [1 E5 @/ M - g.setFont(font0);
, U3 ]8 B+ m5 A3 m - let str = "晴纱是男娘";7 @( N% j, T1 s+ p! j, }! u* H
- let ww = 400;
- O0 ?/ @3 Z# u. p/ E0 G0 E" Z! R - let w = getW(str, font0);
* b# B+ p! d0 S( c; } - g.drawString(str, ww / 2 - w / 2, 200);
$ P. M+ N' y/ z: p1 w - } @# |& F+ g0 g8 ^
! R3 i2 G6 c3 R* h/ E& R7 }- const mat = new Matrices();
7 H. f" T- [- H& V/ y& F" A7 H - mat.translate(0, 0.5, 0);" s0 s* u6 \& w" U Y& W" b0 q2 y/ M
- 6 g! b; B, e8 Q+ k/ e5 P! y
- function create(ctx, state, entity) {
! E! F5 N( M5 | - let info = {" B0 a+ ~* K0 u
- ctx: ctx,
: s. Z8 j) C) p' @: N1 h$ e0 b+ N' x6 H - isTrain: false," m# g9 e+ f/ J( \( `/ P/ M& W
- matrices: [mat],
7 {' V3 m8 t" M - texture: [400, 400],
, Q7 P1 c Q3 l: e3 A - model: {
h7 k3 L/ X- M7 ] - renderType: "light",& A! |" F" I2 |& ]
- size: [1, 1],
' L4 V& z, u. k) M1 w6 e8 G - uvSize: [1, 1]
# ~' y: q4 ~; z" q - }
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- let f = new Face(info);
( H7 j6 a1 j% c8 N1 O& v1 z - state.f = f;# l8 L4 @' H3 S3 Z* T" G: \- L& p+ e
- 0 O0 ^: c5 T% R; N$ k$ v! s
- let t = f.texture;" H! M H6 c2 k, O+ H. n
- let g = t.graphics;
. |2 [6 Z9 N1 ]6 k, W. e" r - state.running = true;
) k$ h. ] z7 s: p - let fps = 24;
: A9 B5 V: i! _. Z; D. [6 b - da(g);//绘制底图- O/ @, b6 \" `) m" b
- t.upload(); T% Q D7 |/ G& ~9 {8 A E& }' \9 M t
- let k = 0;
! ]8 o- k2 q- {" x5 E - let ti = Date.now();8 r2 f3 ]9 C8 W
- let rt = 0;
) m1 _( P1 ?) P9 _1 u- R: c - smooth = (k, v) => {// 平滑变化
F% L& ^* ~/ a - if (v > k) return k;# s% I! G2 `( X
- if (k < 0) return 0;! @3 ]0 e# r s
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( M4 y' E3 _5 u2 c - }5 Q0 ^: W" C; C5 A
- run = () => {// 新线程, k, d1 N/ a0 ~; R3 X
- let id = Thread.currentThread().getId();
& ]& T7 ]9 U7 y" I5 F& S - print("Thread start:" + id);
0 X# b1 I* M( j. c - while (state.running) {
; c1 |% S8 P8 u - try {
5 ~; G/ A% R8 P1 W - k += (Date.now() - ti) / 1000 * 0.2;
$ n" t- z6 d' a9 P5 }' ]/ ? - ti = Date.now();
' N$ D0 k/ ~1 B) @! ]) F& Q - if (k > 1.5) {6 s7 g8 K4 A, z/ o' [' Y1 s
- k = 0;
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- setComp(g, 1);
# l# O1 k! m: H8 p - da(g);2 S7 p& P- u( f9 L4 N6 l9 m
- let kk = smooth(1, k);//平滑切换透明度- M- C* A! h) p% n' J+ G0 o$ p c. `
- setComp(g, kk);% S" b4 g7 E% R
- db(g);% _* g0 B% Q5 A- N% ~, D
- t.upload();
: C2 R$ x/ Q0 G/ Y2 `" {3 g+ V - ctx.setDebugInfo("rt" ,Date.now() - ti);, K2 {( c0 a7 N% j; z
- ctx.setDebugInfo("k", k);
# a. f% j/ @0 M1 |, |3 j - ctx.setDebugInfo("sm", kk);
: W/ O$ v$ T% }9 n, ] - rt = Date.now() - ti;6 n: [& {4 L; q
- Thread.sleep(ck(rt - 1000 / fps));* f6 b- ?9 U1 Z: J8 z, j! H
- ctx.setDebugInfo("error", 0)% I( W: B4 P5 w( P7 g8 }8 Z7 o
- } catch (e) {! C. f9 P7 `! `4 q- }. W6 D: w
- ctx.setDebugInfo("error", e);
1 P, _! t+ Q2 | Y F - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
A9 T8 k! i$ _" p" c2 j) q - th.start();
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- ( ^' A8 w. D5 c
- function render(ctx, state, entity) {' i# e# a' S8 O \& j4 O k
- state.f.tick();
# J1 D3 @! g; c4 |! v) Q - } \( |1 V- H# \# S: M& l! X
- ! V3 ?& M. c- U8 R( E2 ^
- function dispose(ctx, state, entity) {
4 S$ @) l6 O9 z( Y' P - print("Dispose");* V v5 d1 p, ?) C" N# i2 T" ?
- state.running = false;8 h7 N" H7 ^; Y4 G3 l3 [4 N
- state.f.close();3 q8 v) U* Q2 v
- }& h4 i7 ~) J+ N. Y" Q' R# B/ `
/ h$ o# t" e) \# m- function setComp(g, value) {( ^0 q% {" a7 E( ^
- g.setComposite(AlphaComposite.SrcOver.derive(value));
Z n, ~# e& y. y) x, G# d - }
复制代码
" r V. N5 o" c, g2 U- p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)2 z6 w# d9 n9 p" Z! |! @6 H/ X
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