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4 ~& E ^& \) 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。1 T4 C6 ^, `0 P' l9 d* n5 `* y
- importPackage (java.lang);
- G; Z/ n4 Z* ]( e7 g. L - importPackage (java.awt);
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" G, d( h5 T& |0 `1 }- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
! d1 K% E3 x- y9 U) d - let frc = Resources.getFontRenderContext();3 k5 G7 K1 p5 [0 c+ v
- bounds = font.getStringBounds(str, frc);
0 A9 o; A3 p5 X0 a! o' ^8 j - return Math.ceil(bounds.getWidth());( m+ A' y$ S. a0 Y! T) u
- }
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. P, H* e$ M9 J# g. i; K8 y- da = (g) => {//底图绘制; v( Z1 s& N8 O
- g.setColor(Color.BLACK);) I7 j* |' ^+ W- |! c6 a
- g.fillRect(0, 0, 400, 400);
2 @4 x6 W& }, J - }
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# b, z# f, X/ Z- db = (g) => {//上层绘制" _$ `2 O8 g0 g8 y! {0 d! h3 n6 Y
- g.setColor(Color.WHITE);0 t! @9 @! c' g6 S% b9 j: E" J
- g.fillRect(0, 0, 400, 400);1 \8 C& J: H0 b" G! x
- g.setColor(Color.RED);
' J& W) X8 X7 b1 D6 k - g.setFont(font0);. l1 z% X" \5 w, W. _& A
- let str = "晴纱是男娘";
8 u& |# Y& ~$ G* } - let ww = 400;; D1 C: T' _$ d6 }% b
- let w = getW(str, font0);/ h! Y' o2 t2 L& {
- g.drawString(str, ww / 2 - w / 2, 200);% q g3 V$ w; J# O- H( @
- }
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- const mat = new Matrices();
3 a1 }1 J( T4 w' k% t - mat.translate(0, 0.5, 0);
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) q3 Z) x7 |3 t, Y" J7 A6 {- function create(ctx, state, entity) {
" s* Z0 T; _% T% ?# A9 f$ [ - let info = {
" h$ w5 H, B k f1 O - ctx: ctx,
3 {% q- C: S. d; e& o - isTrain: false,
' e; y1 V' I" t* o: b5 G, f - matrices: [mat],8 b4 @7 l4 R. |7 f% \9 A
- texture: [400, 400], U6 r: w% q* [1 H' E
- model: {
. |" |+ Q% o r* u; Z; _ - renderType: "light",/ \ p% D: }5 _+ ~6 Q7 x" ~
- size: [1, 1],& b8 M- @% \( Q, p: S% n+ G
- uvSize: [1, 1]0 X+ E4 s# {* M6 o- t! m
- }0 Z% F Q4 a0 I9 m8 O2 {8 g7 b5 T
- }
$ X& A$ D* Q6 ?, z - let f = new Face(info);: o# C: e9 r! v8 { \, W" R2 }
- state.f = f;
; I& Q8 ^. Y0 K5 { - 8 C' D' ]9 G. T* z4 t! c1 {
- let t = f.texture;
! o* {0 n1 Y4 @% c& H6 v. @' W - let g = t.graphics;, s1 l _ ?* ~" Z& I$ q3 K
- state.running = true;
: h; ?* u* M- E - let fps = 24;
+ B2 t0 o3 a5 _$ @- D! J - da(g);//绘制底图
4 Q) H. q X$ O/ D - t.upload();
: ~ H- P' c$ N( n# t7 }( l4 X - let k = 0;" j3 ]$ E: p5 ]0 r
- let ti = Date.now();
O0 @ Z7 _( r9 c" z - let rt = 0;
/ Y d, _; E) j2 t - smooth = (k, v) => {// 平滑变化
( j4 {1 K- y; H - if (v > k) return k; C" h9 t5 l& L4 C9 _2 X6 D
- if (k < 0) return 0;
+ V2 ?6 f2 i3 L7 C" V, C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 J! n/ @( q) I' D4 n
- }
1 v1 A( X3 H, A( U& { - run = () => {// 新线程1 X* d* s" J( U) L! D4 I0 Z
- let id = Thread.currentThread().getId(); m4 \' h; V. h/ A2 i$ ~) X
- print("Thread start:" + id);
% |+ R' {( S* x6 U - while (state.running) {! y8 ~* T2 {! v7 S& [ I l
- try {
& o2 C) P! y* w5 S2 L - k += (Date.now() - ti) / 1000 * 0.2;
# M* S( H# m# Y' f' W* T - ti = Date.now();- B6 M( S- n3 a1 Z: M
- if (k > 1.5) {
* q6 D# `; [$ Y0 ~. W4 A - k = 0;
$ n. Q6 Q6 Z, {3 o) H - }
& }$ t/ Z" a" W" ^2 O' O, L# _" S( Y3 } - setComp(g, 1);
! h& Z$ F2 Y5 k6 q e! P* J d - da(g);
: C6 O1 S! j I w1 Q - let kk = smooth(1, k);//平滑切换透明度4 m7 y4 K( X; ]/ Y5 \
- setComp(g, kk);
/ a4 f4 `; N# C) { - db(g);
$ u k# L1 s# {. n' \ - t.upload();
( c' L5 z# }, M) h* P+ Y - ctx.setDebugInfo("rt" ,Date.now() - ti);6 V) S% N6 |# X4 A9 `: ~: O$ L+ s
- ctx.setDebugInfo("k", k);! n2 C+ `& B& P
- ctx.setDebugInfo("sm", kk);
5 f3 u5 j8 e! s$ H2 |2 k - rt = Date.now() - ti; z/ i* ?, _( D5 ]* G) g% ^
- Thread.sleep(ck(rt - 1000 / fps));
0 p- V8 `& v. B3 j0 D - ctx.setDebugInfo("error", 0)
+ g3 U4 P- `' S( r8 n - } catch (e) {, T, [. ~0 k8 o# W- n! K
- ctx.setDebugInfo("error", e);
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- }
' l) e( g1 e& z! K- c - print("Thread end:" + id);" u+ d+ x A. x) m; C) p
- }
/ B; B7 p3 S# c - let th = new Thread(run, "qiehuan");
" D4 R$ `% s4 W0 O8 S2 q - th.start();5 D+ | U$ R3 _2 H+ o
- }
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- function render(ctx, state, entity) {
& M6 E6 w* ~/ d# u8 O - state.f.tick();
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- 3 G+ h2 S2 Y5 h8 P1 \; ?
- function dispose(ctx, state, entity) {
3 Q3 t! M- A" o) W4 O6 [- ^ - print("Dispose");5 y0 w8 a9 {' l8 i9 r0 l
- state.running = false;$ R. e9 D) q& x
- state.f.close();
1 H+ ?7 K5 S6 |3 g0 a- ~0 o6 i- V, v# U - }
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- function setComp(g, value) {
5 B# |" u+ o) h i5 z - g.setComposite(AlphaComposite.SrcOver.derive(value));
; L* r8 O9 b$ _! N - }
复制代码 ) N: Z% S# ~; T. G8 ^
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。$ a8 a3 f0 q3 y& R0 y( V
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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 l" F8 o6 D9 ^% N* N- T
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