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* X0 m# V, s" F; K, w# C$ o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。
: A( l/ e: n3 x( b" V1 j- importPackage (java.lang);
/ [/ d5 t) w% v- z - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));) d2 u3 w- |. l7 b1 K
8 I1 ]! n+ K( D' y8 n2 d6 v- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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+ u: R) Y7 s P* _* Z3 V- function getW(str, font) {9 k/ B5 g& m, _9 h9 h; s! g$ C
- let frc = Resources.getFontRenderContext();
7 {/ l6 p' M+ \/ X3 ?, Z! n5 D6 e6 r - bounds = font.getStringBounds(str, frc);
& i% f% @1 u1 o5 _: m8 r9 x6 G - return Math.ceil(bounds.getWidth());: r6 j: _0 R. B3 D
- }
- O& H. O# h; r+ {
3 j4 K4 ~0 d& E& A2 d3 ?- da = (g) => {//底图绘制
+ }) j0 R$ o g( p: D - g.setColor(Color.BLACK);: f- r3 R" W" j# P
- g.fillRect(0, 0, 400, 400);
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- 9 ?* y5 h7 d+ \
- db = (g) => {//上层绘制9 d% w6 i6 C# H) t$ V- E6 [" l$ y& g
- g.setColor(Color.WHITE);4 n, u6 ^0 J* C& ^
- g.fillRect(0, 0, 400, 400);- B# z" B% O( P+ t- j! B
- g.setColor(Color.RED);3 w2 i1 I7 Q, ^/ ^# n; Z* }
- g.setFont(font0);
- H A) B" H* D9 @' j8 \: ~ - let str = "晴纱是男娘";
( K/ Y" }3 {3 N4 g" ?$ B, F1 r - let ww = 400;, G' R! J: P- [4 p7 E$ I9 P+ O
- let w = getW(str, font0);' d) |+ ]$ W& Q _2 ?
- g.drawString(str, ww / 2 - w / 2, 200);, R# ]9 C6 L- q! ?2 A, ]: y
- }0 z9 J4 @( l% ?& c# j* {
- ! q8 i! ?5 N. R" T/ l# i
- const mat = new Matrices(); {) m- ?# K" F( C9 Y
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {* T/ c( ^; c& g
- let info = {4 z3 f& A1 g; p# W* E& K8 |
- ctx: ctx,) A) S9 w. g& T4 j7 M
- isTrain: false,) _2 a$ C* }& \- ^9 x0 O! e
- matrices: [mat],* {$ s- f* Y5 O' u% Z+ G
- texture: [400, 400],/ S( C; `: {, R# o1 f0 i+ _) A: x
- model: {8 P) p9 L1 S7 ?6 j m8 _7 ]. X
- renderType: "light",
2 X, O2 R2 P4 J4 g$ p - size: [1, 1],0 g2 X/ V9 c. e
- uvSize: [1, 1]
. A, L9 l4 k& F, } D( m2 ^ - }
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- let f = new Face(info);
# T3 }7 J0 V$ y) P/ t: d8 V - state.f = f;- }2 k. e# f# l+ w2 `
4 ]! `% V O9 p( h4 t0 i- let t = f.texture;
8 _; ~& e! f3 u, |- Y) p+ X - let g = t.graphics;# a1 ]9 L! Z2 h0 M
- state.running = true;
8 l+ }4 Q2 i* M5 e9 P3 D+ s' i - let fps = 24;
! Z0 e6 C8 ]8 ~# C0 m( A( ? - da(g);//绘制底图, L- e' ?* N2 H- u9 r9 W0 E
- t.upload();
. D7 r6 h; U/ r1 M5 t - let k = 0;+ ^( v4 t# m* R; Y; X( N3 Q' R
- let ti = Date.now();0 ]' |0 O7 d; l6 d2 r
- let rt = 0;/ m# S& v% L2 U- s/ y3 I% l
- smooth = (k, v) => {// 平滑变化
E5 V$ }2 I! F0 Y - if (v > k) return k;
8 v$ q1 }) }" R2 H6 J - if (k < 0) return 0;
0 g7 b7 }' e z- g) c - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 p, I3 |! R, N7 u
- }" M5 Z5 v# ?6 g( {& L
- run = () => {// 新线程
9 R0 ~3 o" |4 i5 A% V9 V - let id = Thread.currentThread().getId();
- ^- R2 s3 W& R. d' x$ q6 |8 e- a - print("Thread start:" + id);+ D! Y% @" }4 M& J7 ~" m$ r
- while (state.running) {8 ^. ^! r. b& c: G( M4 X
- try {
. e0 M8 }" o& l1 \2 ` - k += (Date.now() - ti) / 1000 * 0.2;
4 [5 h4 v7 a/ [: }" {3 m$ D - ti = Date.now();6 S& E! {, r- s4 p S% A( x9 X
- if (k > 1.5) {
' l% _( I7 ^ Z, h# g5 ? - k = 0;
* \0 T, B3 T9 S - }
/ H% T, {/ H, `) e* V5 Q - setComp(g, 1);6 C( G" G6 T) d/ R& o
- da(g);
% p. f/ e" X0 _* U& ] - let kk = smooth(1, k);//平滑切换透明度
# A4 K- J7 c& W: l( |+ n - setComp(g, kk);1 c/ f/ y- D+ v6 \) H7 h1 x
- db(g);
1 e* h. |7 H" \6 w% u - t.upload();" j: ] Y' Y6 H6 o$ ^6 o5 C; P$ j, V8 u
- ctx.setDebugInfo("rt" ,Date.now() - ti);" L! P. e3 `. A1 ^$ x+ K
- ctx.setDebugInfo("k", k);
# }# I4 q/ r8 g2 g) a9 ] - ctx.setDebugInfo("sm", kk);6 |; K6 b5 m# U1 L
- rt = Date.now() - ti;# C% Z; c. \% M( G3 P+ G8 D0 e
- Thread.sleep(ck(rt - 1000 / fps));& l. a% J( t5 @( n/ ]
- ctx.setDebugInfo("error", 0)
7 q; T3 l8 C" S' C+ e1 ^ - } catch (e) {" J& H6 r) X6 I0 L2 d
- ctx.setDebugInfo("error", e);2 J+ Y# ^# g2 O4 O/ c
- }0 i; v4 f: Y% d
- }2 X9 r" v, }+ @; Y1 _( Y
- print("Thread end:" + id);
9 ]+ ~8 T7 m' q9 W, C - }
1 g: k0 x! t6 L+ G# ~5 Z - let th = new Thread(run, "qiehuan");. l4 g( z5 ]1 M. m/ x0 e _/ I
- th.start();
# `# i* M/ j& D* O# |1 T; [! ? - }
" L @0 g* M0 M! ?2 E9 o8 d5 h" h
5 [; `7 E" T% ^" n- function render(ctx, state, entity) {
" D3 N5 N4 q; P8 n% m - state.f.tick();
% u$ U7 w; r( F& c$ J - }
' \) Z# Z8 V0 ^, K; n- v1 ^
$ r* B2 v, n) U( W e- function dispose(ctx, state, entity) {
1 k E4 o& [, j' g% ^, f% e8 H - print("Dispose");
$ H6 X5 o8 @! [2 ` - state.running = false;7 o' L7 C$ O$ @9 ~& ~% X
- state.f.close();# j0 S) l: L. H! S* m. @- p
- }# ~/ q- H* z, x
# q' A ]2 `% Z- function setComp(g, value) {. u; s. v) G7 j) Q% D
- g.setComposite(AlphaComposite.SrcOver.derive(value));6 j" s9 m" y$ K9 S
- }
复制代码 Z4 w+ l+ z3 i$ Z! H
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。; z* A0 p' J+ s( Q) W' f% w
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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)8 H9 Q; M, P6 }4 R2 U0 z; `
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