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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。
, V1 B) q& Z) N9 _/ _! h- importPackage (java.lang);
4 l5 D/ ~" h, k' p/ [ - importPackage (java.awt);
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1 y; ]( L* L Z$ j- include(Resources.id("mtrsteamloco:library/code/face.js"));" X+ z4 E$ T5 q
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {7 g9 h& q+ w( \! |. I8 K
- let frc = Resources.getFontRenderContext();
% Z- t& U5 G, [1 O$ H - bounds = font.getStringBounds(str, frc);
& d- G; C. Z6 p% S - return Math.ceil(bounds.getWidth());
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- da = (g) => {//底图绘制7 m& d8 D7 J, n, J
- g.setColor(Color.BLACK);. @" ^! w- S! n& v$ V- u6 E8 Y" h
- g.fillRect(0, 0, 400, 400);
+ g) R$ M7 o5 N. ]& f- M1 R - }
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$ q2 ]8 Y0 X/ @- |( w6 c% M- db = (g) => {//上层绘制
6 A2 B2 K. c8 T$ m" l! k+ @8 y# { - g.setColor(Color.WHITE);6 i, ?& C- r$ }$ ~# C5 o: ^
- g.fillRect(0, 0, 400, 400);" t, |: G. \# Y$ [% S0 c4 h/ g
- g.setColor(Color.RED);/ f, n" m/ f4 @ N4 I2 \
- g.setFont(font0);
* J; x. k) H& T+ w+ p4 R, Q - let str = "晴纱是男娘";) t9 o3 S, X6 C# i& @2 |0 s& @+ f- I
- let ww = 400;
# w3 G2 Z: ]* B/ l; s% o. c - let w = getW(str, font0);3 t8 B' X# ^1 C: }3 |3 ?( p ]' A
- g.drawString(str, ww / 2 - w / 2, 200);
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0 _% H0 [0 g2 i0 A- M0 W- const mat = new Matrices();
# p. t, v& f1 c% H+ S/ ^ B - mat.translate(0, 0.5, 0);
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6 E, D9 L1 m$ D! Y6 Q- function create(ctx, state, entity) {
6 d. |1 M4 \' `: z+ ~; g, ~; w/ _ - let info = {. K4 V _/ u9 r5 r
- ctx: ctx,
% G Q' h( U, B/ D4 U* }4 p. a - isTrain: false,) S) e4 k! x! |; H
- matrices: [mat],; j' b4 x+ s, B& Q1 m5 v8 U
- texture: [400, 400],
% N3 ~7 G- L8 T3 p2 M - model: {5 H2 F( c0 B4 l
- renderType: "light",7 B+ } D' A" O
- size: [1, 1],2 d/ f! ?) X8 q. p/ |" j/ o9 X
- uvSize: [1, 1]: C9 n) ^' }) V W7 w) I
- }
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- let f = new Face(info);
2 ]: H* X0 F \' l" R& l - state.f = f;
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- let t = f.texture;
: W0 T" {7 ~6 G' ] H" f- M/ A9 b2 D( M - let g = t.graphics;: w9 g, m' E6 w. e' ?
- state.running = true;
( C1 M) q1 N6 I x, g - let fps = 24;" c2 _6 s g: {. Y2 e
- da(g);//绘制底图5 _+ e( u1 i/ I# o d
- t.upload();
% P( E7 B' R/ r; R& t) p. e - let k = 0;& }7 X. i; j6 H! E* F
- let ti = Date.now();
% P1 X6 x4 X- r) o- T. a - let rt = 0;& t" i6 x! K* e0 {- Q8 I5 `8 L
- smooth = (k, v) => {// 平滑变化
! E' E0 B! E) J* h1 q - if (v > k) return k;8 |) n- h# O1 w; T4 t8 N; A- O
- if (k < 0) return 0;- n7 a* i3 ~, ?# ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
d6 N& b0 h% ~" _/ U* p - }
# Q. O7 M2 g. c y - run = () => {// 新线程# \! @0 O$ r5 e# w, F$ D
- let id = Thread.currentThread().getId();
$ i; B! `* r3 ^. B( a) n - print("Thread start:" + id);
- G4 q' P! b( p# G4 W! d+ L - while (state.running) {! y/ a2 Z" d6 B0 h
- try {
: ~: A3 y" Q7 k( _ - k += (Date.now() - ti) / 1000 * 0.2;
1 @( u+ ?( K4 B7 w' ` - ti = Date.now();
2 d9 i5 O' c. E) B' H) i- e - if (k > 1.5) {. l7 x% S& t' i; x$ g
- k = 0;5 B) O3 Q& Z3 y/ S; u* K
- }( H$ @1 `9 e6 X4 ?4 h
- setComp(g, 1);
: ^3 x8 }2 \1 P6 f - da(g); ~% ^$ ?% Y. B4 N' I
- let kk = smooth(1, k);//平滑切换透明度4 y$ h+ q$ U" o
- setComp(g, kk);1 Y1 c/ {* t. V3 g p
- db(g);
# H$ |5 f8 ]/ \) U$ X- C! q3 |5 M - t.upload();
, h# s# y: |) V' C! {6 }/ O - ctx.setDebugInfo("rt" ,Date.now() - ti);
0 c7 x1 }; J/ _5 P; f) }4 I - ctx.setDebugInfo("k", k);9 C% y' b1 s# C" G& u
- ctx.setDebugInfo("sm", kk);+ F ^( {6 {8 D. \) V( @7 L
- rt = Date.now() - ti;* Z0 A; P8 C- L4 n) B
- Thread.sleep(ck(rt - 1000 / fps));4 s% t8 ]/ \# v3 f+ q
- ctx.setDebugInfo("error", 0) w1 H% _% Y6 ~
- } catch (e) {+ E3 ]; v- N0 C) W: x5 s
- ctx.setDebugInfo("error", e);! C9 W3 o% P3 L6 L. _* ?+ w
- }
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- print("Thread end:" + id);3 Z9 B2 Z f/ s% g* J Q
- }% g6 A8 a. S1 H9 T9 e
- let th = new Thread(run, "qiehuan");
2 E2 ?8 x# p0 m3 X k, |2 j - th.start();
5 q# `9 h4 |9 E* _! N5 ` - }
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- function render(ctx, state, entity) {: i( h' V9 e# \; Y4 K8 @/ ?0 I
- state.f.tick();
' w! _' c y: b: X - }
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- function dispose(ctx, state, entity) {
$ m0 o# V- ]" }& L4 a - print("Dispose");1 b x6 n( a+ q' T( u& @! p
- state.running = false;0 c" [* f! W! J$ h! K1 J% a- ?
- state.f.close();& H6 ~8 P6 P3 `. ?( @
- }) k5 R+ \3 n# L3 ^3 @1 ~9 @
- ; ^/ Q; [7 _; j2 _! ~
- function setComp(g, value) {) Z6 M# w) N1 T- N
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 c E8 ] Z' U' q- [ - }
复制代码 + \7 \1 z! W9 U& I
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)# I6 x8 o4 {- O: D
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