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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。
0 n. `1 R) x/ j- importPackage (java.lang);
8 t+ C1 h- y9 i k6 b4 [ - importPackage (java.awt);
8 K8 _- m% g2 G$ R) S
3 o% t- M6 B" n7 h( T* v% ?- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. m6 @+ B- H( z& e$ }# X2 x! o
) I( H/ j6 @* I8 r% _5 W- function getW(str, font) {
4 C" O/ V4 \ C0 u% c% Y - let frc = Resources.getFontRenderContext();
8 l. g) j5 I; V, ? - bounds = font.getStringBounds(str, frc);
+ [0 V* C) E) V: f) `9 w9 L1 Z S - return Math.ceil(bounds.getWidth());
) ?4 w8 U- C- d" O r' ] - }1 `# y+ k _' S% k ^+ w
t/ z" L% k3 o3 _+ g1 s8 f9 `- da = (g) => {//底图绘制4 T0 Q4 e0 w, t0 Y( r0 d
- g.setColor(Color.BLACK);0 {! H* n( f( p+ }, c' n5 F
- g.fillRect(0, 0, 400, 400);
# N! D3 l7 q) }5 N - }
3 o. f) w8 ~" W
- X5 Z7 a' Z( o% u- db = (g) => {//上层绘制
0 T9 G9 ?$ V$ _% D0 w0 F, F - g.setColor(Color.WHITE); [9 L( }1 W# y8 {+ c
- g.fillRect(0, 0, 400, 400);
3 q0 \* h3 Q5 v; e( T' G* [ - g.setColor(Color.RED);
+ D) A0 Q( {$ P; I- b - g.setFont(font0);9 v+ k% i! _# V$ e& m7 U
- let str = "晴纱是男娘";
$ F6 Z* x4 F5 Q: s - let ww = 400;
9 o! I& u! P+ o8 @% N" W - let w = getW(str, font0);5 }8 C# @9 G) h7 S9 x
- g.drawString(str, ww / 2 - w / 2, 200);* H$ M9 I& A7 L- y r) i1 p* w
- }/ E8 [- K$ C0 m9 b! h: V
- % t \' Y2 w% A1 v8 j
- const mat = new Matrices(); t9 W& F# u/ m
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
0 W0 a9 n* g" @+ Q - let info = {' |) s$ d3 D4 K, a, ]* P
- ctx: ctx,0 \# I! p b1 M
- isTrain: false,
5 I* Q; V+ Q# w: w* ?: U! @ - matrices: [mat],4 }2 n W3 ]; }( i% `9 E6 z
- texture: [400, 400],
( M R; _, V0 O - model: {/ a( l6 n2 q' X" u, @* I
- renderType: "light"," \7 v8 O4 v* ^5 G
- size: [1, 1],
$ K0 d% v( P( z. K% Z, m. n5 P - uvSize: [1, 1]5 s' a' x9 S: K9 }5 p) K
- }
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- let f = new Face(info);3 r) i' k, Z0 M2 O) w" V; a- |
- state.f = f;, P. _$ K; P# S# O( f: b
- $ E) J- J9 h5 x& m
- let t = f.texture;2 J% @! a7 ~& y5 {( F. i
- let g = t.graphics;
: V& \/ h/ h9 a2 i u* i - state.running = true;
& T; L! @: d1 b) X* \ - let fps = 24;+ p* P7 G" ~. F; P; B: C
- da(g);//绘制底图& k7 k6 m' w3 c2 @' I' B
- t.upload();0 v4 O* ]+ C: D- n
- let k = 0;& @2 O2 b8 z0 s
- let ti = Date.now();# X+ V; K2 o Y! u
- let rt = 0;
! _% r' A* f, u/ M2 w9 T$ e0 V - smooth = (k, v) => {// 平滑变化8 _! A% Z8 t9 i3 Y( }
- if (v > k) return k;* f% g, X" n7 _9 N* J9 [- Q/ H5 c
- if (k < 0) return 0;
. A! j% E, p n0 C s- @2 C/ q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" ?1 p8 ~* u5 Q, B2 R2 o1 c9 d3 M - }: c) H1 W% W2 c/ x8 s
- run = () => {// 新线程2 S. A% l, H4 A0 `- A! l
- let id = Thread.currentThread().getId();0 d* G) p7 @2 N
- print("Thread start:" + id);
9 I# k1 i5 g; B6 r |2 s' P) u - while (state.running) {
$ ~2 r9 r1 x$ t/ J8 G - try {+ w- H2 j" P# W- B& f9 c2 g
- k += (Date.now() - ti) / 1000 * 0.2;
4 z/ P% C0 w$ ^) o) \, c- D - ti = Date.now();) C+ f" [" ~' @* g6 H
- if (k > 1.5) {
9 x5 y- c; E; ~: Z" {0 S$ w - k = 0;
, P3 I7 g: Q) r. k* k - }. e& H5 v! L# z3 I
- setComp(g, 1);) l# }5 s5 j7 l e# O
- da(g);
2 B$ w" n1 H b - let kk = smooth(1, k);//平滑切换透明度
1 _ i: ^) }! q0 i* m k( B - setComp(g, kk);
k+ {. D# u4 P5 O. \9 [ - db(g);
' F; X7 H3 D7 A n; { - t.upload();
0 G* c* _& }) d' i3 D% H - ctx.setDebugInfo("rt" ,Date.now() - ti);
, \- O7 t+ x; G$ Z% i. z' e2 P - ctx.setDebugInfo("k", k);
# W4 n8 t1 h4 U* Y* c - ctx.setDebugInfo("sm", kk);
% x/ d$ e8 W& H& n% x - rt = Date.now() - ti;
% s0 x( W- c7 L) P& ^3 C - Thread.sleep(ck(rt - 1000 / fps));
" h& |* d9 L% \) @ - ctx.setDebugInfo("error", 0)& j2 r# @( m8 D7 q( P4 W+ Z
- } catch (e) {6 g& i6 z M. N, p; _% ]
- ctx.setDebugInfo("error", e);
0 l s3 ~+ j4 M* G) L - }
" g$ x2 Q0 X! a5 K% n q2 a. a9 Y5 U - }
' l) A& G" |1 Z# O - print("Thread end:" + id);* i! l$ k* N. U. Q
- }
* F: a$ [: p9 p5 e, i5 t2 ~ - let th = new Thread(run, "qiehuan");' J& j& s. c9 V. |
- th.start();
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- . L" A( P; r! m* p% Z$ C/ b( X0 u
- function render(ctx, state, entity) {
. n* u9 {' p# [% _ - state.f.tick();
2 _8 C! g0 q( d5 q5 J7 x - }1 F$ g7 G7 R5 v9 v' C
- P. m; z$ c# Y- function dispose(ctx, state, entity) {
, n& ^" j, ~1 i6 W - print("Dispose");
- s# X0 K: O/ t5 X- r - state.running = false;
) M- F, O: L: {8 H) t - state.f.close();# N' I# j% o3 F. i! j
- }, B# {/ |# A$ q' u' Q7 Z, r
- % v. ^6 `& _8 v, ?
- function setComp(g, value) {
& _0 x( E. s5 J% K - g.setComposite(AlphaComposite.SrcOver.derive(value));' p5 K# N! S; Y
- }
复制代码 9 C7 m8 d; Y$ v$ G
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。3 A8 d4 C$ f; o. x) H/ h
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- b# a& ^3 X& I1 h2 |顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! |- S: Z+ Z/ z
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