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! O4 A6 [ ~: h L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。
# o. \+ Z( @: `2 k9 ]! G# i) A- importPackage (java.lang);
( h: T4 @( o( D; C. S8 R - importPackage (java.awt);
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& \) _# i: u3 n% Y, ?- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" O) c) _! ~ X, f" i y& c# M
- 5 N" E$ V4 \* c6 P# i( ]
- function getW(str, font) {
4 Z% g6 ]. M, o( F# A7 a( ~6 S - let frc = Resources.getFontRenderContext();! n; @/ F6 L& J$ h7 ^- ]
- bounds = font.getStringBounds(str, frc);
4 E |3 I8 c1 v% e- ?1 e - return Math.ceil(bounds.getWidth());
q. K/ }0 G# B0 m2 J - }
4 }( l; ?$ e. r* d: T8 t5 k" ` - % z% \5 @8 _ R: T9 a0 y; ]; D
- da = (g) => {//底图绘制
6 O4 h" y- c, k! x. p9 [, V+ v" m - g.setColor(Color.BLACK);
# F; Y! L' h' o$ z - g.fillRect(0, 0, 400, 400);
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1 o. m. v" [; f, h% I- db = (g) => {//上层绘制. G$ B" s& p; a- Z2 _
- g.setColor(Color.WHITE);
( X* C- M# A9 s. a5 f: T+ a9 x) ] - g.fillRect(0, 0, 400, 400);
T- L! I9 p, h; V# N- Y - g.setColor(Color.RED);
% m V7 W, V0 p$ M* Y8 R( ~ - g.setFont(font0);
0 x# R9 V& w$ M% V$ z1 M - let str = "晴纱是男娘";# d3 a+ i2 k& {* m( @
- let ww = 400;/ L/ U. F) E4 F
- let w = getW(str, font0);) T+ E( T0 ~0 A g# R: I
- g.drawString(str, ww / 2 - w / 2, 200);3 H/ U0 j7 b" ?" i% `8 T+ }6 W
- }
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, h" l' U1 W4 {; a- const mat = new Matrices();8 O. f. d/ P% C
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {; R( V: e$ k8 h7 ?" v, y. J9 f
- let info = {
4 B$ U- V$ F% u. L& v - ctx: ctx,7 x# e4 i+ i1 j& K- J+ e F
- isTrain: false,
2 p7 b2 H! D# A. } R - matrices: [mat],
6 V- W6 C' K8 Y4 D3 m - texture: [400, 400],6 P. ]3 ^, g+ ^* V4 K" V
- model: {$ \8 ]- V/ @& }* \: w% A& A1 X, x
- renderType: "light",
6 ]9 D: k" o2 _/ h - size: [1, 1],
1 b7 p/ m/ r3 k$ G( v; H - uvSize: [1, 1]
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- }& v9 D5 G0 j1 {- W
- let f = new Face(info);/ R4 O ^) s6 a4 c( e
- state.f = f;8 s; D" d0 I( i. _6 X) T) n$ d9 t
- 7 c% }8 M$ {/ g# |
- let t = f.texture;9 `3 F/ [( Q9 Y0 p% D1 ^0 c
- let g = t.graphics;
3 z. ?4 R/ ~6 ^& l2 M - state.running = true;
+ q6 M# i6 {. k7 a( e* Q - let fps = 24;( {3 I1 A z; J+ b1 Z
- da(g);//绘制底图4 o' G& Z! T' t& [- J' q+ D
- t.upload();
; M' g. C6 D, k9 G V" v - let k = 0;& |; W0 J0 T0 F
- let ti = Date.now();+ t/ r3 }1 X' N! W" g. O7 N, M. s
- let rt = 0;: \- l4 s5 B- l) e; |( m, r
- smooth = (k, v) => {// 平滑变化
9 [4 i0 g- x/ g0 n; c8 S; t - if (v > k) return k;
/ C; S, x3 n6 t. S6 D& I4 d - if (k < 0) return 0;' T& C3 M$ b9 J, Q9 u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程/ W% R$ ^# [* ^. j* x! H
- let id = Thread.currentThread().getId();" u8 C7 n. Q. f4 X0 K9 e2 B2 [/ E$ v
- print("Thread start:" + id);
; x A# y% F1 f9 [- O; b+ f - while (state.running) {
5 O4 t9 K- l; c0 J& | - try {
# ?! G$ v2 t$ u( h8 s - k += (Date.now() - ti) / 1000 * 0.2;
1 S3 G! o7 C2 W- ~: E - ti = Date.now();5 t3 F6 V9 j6 y5 L; b2 ]* o9 p. r: J/ w
- if (k > 1.5) {' ?6 m: R8 ^1 w6 c9 g- H9 I
- k = 0;
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- setComp(g, 1);
+ S- q: B( ~8 w9 ^9 G - da(g);% w: ~1 D4 o9 b. K' M
- let kk = smooth(1, k);//平滑切换透明度
0 T" [+ ^- x; h$ K: J7 u - setComp(g, kk);% X9 I2 U* s7 e
- db(g);
2 ]( @8 {! R/ v# @! { - t.upload();# ^) ~% h) d4 l. n4 t$ L! r
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( d2 o* {7 k0 J3 I4 l4 Y - ctx.setDebugInfo("k", k);; }& \( Q( n1 N. z+ [
- ctx.setDebugInfo("sm", kk);7 O1 E+ P$ u, \* R# p
- rt = Date.now() - ti;- w# j5 C; t/ H2 U3 J N
- Thread.sleep(ck(rt - 1000 / fps));4 d/ | ~' h/ Y F/ f
- ctx.setDebugInfo("error", 0)
2 B6 w9 J) Y7 x: G# l5 x* ]0 Z - } catch (e) {
* e! Q2 G9 A7 r1 Y3 U5 I! t0 T4 z! k - ctx.setDebugInfo("error", e);0 @1 J- o2 s' t- H" l( v. j% t; Z
- }9 [2 w) \# w- l2 W0 P3 n
- }
# w4 S6 E% o1 E/ W- y( J' x - print("Thread end:" + id);+ T) ^ L) u6 ^, c
- }5 c5 W7 N& O6 h! R( O' o' F
- let th = new Thread(run, "qiehuan");. L4 w3 U/ H! p8 s3 s- f
- th.start();
: Q" L. b# E* S - }
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- function render(ctx, state, entity) {
8 l' ] N5 f& N- [" a - state.f.tick();$ ?( Y3 {+ C5 i- e& `7 C: q
- }
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' a' O0 O+ [# Z, T: K0 k- z/ }- function dispose(ctx, state, entity) {
9 }* d: r. u0 ` @9 K! g5 ~' W - print("Dispose");
. @7 O% S6 o' i6 k - state.running = false;; O ?; B- f3 I9 J( i7 E L
- state.f.close();
4 n6 x& ]; `. a. c$ y; K - }
- o4 a5 l: d4 W+ x; t - 7 Q2 I6 I9 C! Y7 S
- function setComp(g, value) {! H. D; h. I# Q) b; {5 p
- g.setComposite(AlphaComposite.SrcOver.derive(value));: Y: ~5 ] l2 K$ C* r4 k' m
- }
复制代码
3 d4 a. C) @7 J# i* f2 w2 \, [, M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)
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