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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。- L( a" P' G, f
- importPackage (java.lang);
+ n3 B, }8 U( k: \ - importPackage (java.awt); A' U1 e) Z% t4 W @+ p9 v
. s9 ~, C4 w" I3 i' Z- include(Resources.id("mtrsteamloco:library/code/face.js"));5 J3 t# t) w5 N y
- 0 T- c. @4 Q9 j8 x2 T6 t; Y' L7 z
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
/ t- P5 A' t8 `( B8 ~. q* p/ J - ; O5 ]; j4 [- ~- o6 C/ z9 o
- function getW(str, font) {
5 s' E/ ~9 F( ^( h% d5 U - let frc = Resources.getFontRenderContext();' G6 {" R( H& E3 y8 B
- bounds = font.getStringBounds(str, frc);
" O3 Z8 y* z1 T9 P0 b1 K$ k - return Math.ceil(bounds.getWidth());
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- da = (g) => {//底图绘制
" @ r6 b f+ l: M+ m5 B8 f9 s+ I! P - g.setColor(Color.BLACK);8 b I* `& i. B; o$ N
- g.fillRect(0, 0, 400, 400);
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- , n& |' {; p R4 h
- db = (g) => {//上层绘制8 J# c' T; u" z% o! `
- g.setColor(Color.WHITE);$ X5 w2 K. a6 F% g% {* p. \" _( v
- g.fillRect(0, 0, 400, 400);
3 P$ P. ^5 L3 x2 |- V) |) e - g.setColor(Color.RED);
7 E. S8 q i$ G: W$ i8 {% h- ? - g.setFont(font0);# s% O& I4 n. b( V2 Y; p; |
- let str = "晴纱是男娘";. ^6 M+ J7 l7 Q5 E2 \
- let ww = 400;* N+ H& _ o3 _1 U
- let w = getW(str, font0);
3 u1 g/ S z2 y - g.drawString(str, ww / 2 - w / 2, 200);
9 |. E& |. [5 F0 a - }
8 J% K. Q! S4 z- B
7 Y D1 n+ E$ V+ A0 U, G- const mat = new Matrices();# T. S: [% B) y; s$ Y
- mat.translate(0, 0.5, 0);! J! g8 |* Y! L. Q8 h' F
3 ?0 m+ q, y, N; T6 s, r/ i- function create(ctx, state, entity) {+ E. B) N. K e0 o7 m; K( D
- let info = {
8 V% l- N; d2 K - ctx: ctx,
& m+ g( j& j5 S# X - isTrain: false,1 M8 D3 } q- ?
- matrices: [mat],' {" G* R* M4 e2 e5 ^( p! T) Q
- texture: [400, 400],( d" Y6 p1 ]0 [, S) D: P
- model: {
. t! j! k# ?) u& a0 o1 q - renderType: "light",
0 g+ l. J+ S' o) m" w/ G - size: [1, 1],5 ?4 p1 N- I U7 |! {
- uvSize: [1, 1]
3 g' f0 i; {7 u" z1 r% ^ - }/ u! h' I- \, e
- }
2 D& J) T" ?& U- l# D( E# d - let f = new Face(info);
& V- b! Q4 i; ~+ Y - state.f = f;
8 W: R/ T( d$ R" t5 L7 Z - ( O: u! ]4 B2 }) n, A/ D
- let t = f.texture;
! w) X1 _' M+ g; D7 f - let g = t.graphics;
3 Z$ j: j: U1 c( `4 p* r0 b - state.running = true;
2 d2 B+ r) t2 L - let fps = 24;5 I# I O; y6 I2 S- I7 y
- da(g);//绘制底图
1 A4 R9 y' X4 ]- i5 j; V X - t.upload();
. @& F9 s0 K: ?' r6 U* [% F - let k = 0;$ t; r, q A! v8 s! F, t
- let ti = Date.now();
! E- W6 G! X9 d' M0 g" R - let rt = 0;7 t; P) L. y( m+ `: Z9 j
- smooth = (k, v) => {// 平滑变化
/ ?" V: B; j- v2 R- {& B' K% d3 f6 _ - if (v > k) return k;
7 w# \, O" M, [4 K( h' } - if (k < 0) return 0;) v8 |% u) b/ l
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
; e r7 E$ I$ A1 O- H - }
0 r9 r: V# {" I& k0 n5 u - run = () => {// 新线程
, I; d# H) m" T1 m$ ~$ d - let id = Thread.currentThread().getId();3 Y0 Q5 }4 h0 c6 f! u: G
- print("Thread start:" + id);
2 ~* H/ n& v$ }# W' `" y; k - while (state.running) {
3 \' S2 D- ~2 Z! i - try {
- r3 t) V" ~6 f5 E; ^3 H0 Z. ` - k += (Date.now() - ti) / 1000 * 0.2;
4 T- K w4 B" }7 k - ti = Date.now();
/ L9 F# w: e9 W7 W5 Q - if (k > 1.5) {9 F- f; O4 M0 w6 \1 P" Z. b1 h
- k = 0;
& c8 n# M% f( C+ J, X2 f1 i - }" G& i, C/ j) X6 M% l. ~
- setComp(g, 1);, x L" B8 |1 S$ t. R$ F! e
- da(g);
" f, H: [ t% O - let kk = smooth(1, k);//平滑切换透明度 F3 {* T% a9 Y* \6 W+ C2 j
- setComp(g, kk);. R. @5 r- k! {6 I- H
- db(g);: T, q6 x0 X% p# Y+ t& t" W
- t.upload();
R; [$ F% |; G% m6 d3 j! N - ctx.setDebugInfo("rt" ,Date.now() - ti);
! s; ^5 }2 m1 \& O( H$ h" _0 S - ctx.setDebugInfo("k", k);! f: h) q, Z2 |( \
- ctx.setDebugInfo("sm", kk);
9 Z% m2 Y5 }+ ?" W3 J - rt = Date.now() - ti;5 k5 D1 \; c, {4 D t
- Thread.sleep(ck(rt - 1000 / fps));8 d& v# l: A9 w1 ?
- ctx.setDebugInfo("error", 0)
Y# ~# g# n7 ^- i0 I - } catch (e) {
; w, N7 m/ _$ {5 O. m. v - ctx.setDebugInfo("error", e);
# C# H) m% \6 H" e - } s0 B" u" o/ L! i; W; [1 C
- }
/ X6 x4 f* y( l( _ O - print("Thread end:" + id);' y* c9 y% e% o( o% F6 P
- }; b, D5 U' t/ ~0 H
- let th = new Thread(run, "qiehuan");
+ k. ^+ f& }: w, |" b" b" F- j$ O - th.start();
# s) O* {* x$ r; l9 Z: k - }
4 U( P1 ~2 x. i( O! C
) e' w1 W0 f8 _- J& ~6 b( |- function render(ctx, state, entity) {; P$ D* g$ y: ]3 L% m1 I) B; b
- state.f.tick();8 I- {, X( S9 @
- }+ R! g2 j3 b9 f) H9 D7 t
- # p# o9 u, H2 V/ [5 e% n* A$ L1 L
- function dispose(ctx, state, entity) {
% U: i8 l# K, k - print("Dispose");/ x( J0 F# w/ B& L' x5 M! n$ ~
- state.running = false;
& M6 L; i7 o% I# v - state.f.close();2 |# Y" S( e% G2 {9 R, N# A
- }1 m- _; Y' c" X2 c- Z
9 U+ \! o- z2 s$ m- function setComp(g, value) { g3 x- E6 ?7 f; K
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 o% ^* O. y/ y) }- i" `* R - }
复制代码 3 z0 a; o7 n! j' T8 q" K; z
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。$ O0 {& h& n; ^ H# c2 I
3 f6 ^" {, n1 e! x) \: l
G7 @7 s" I3 K2 N2 T顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 {8 \( O% s2 r, H
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