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2 K1 G# E# L( ~5 x5 ~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。3 F+ G4 d- m! W4 E# H# B \
- importPackage (java.lang);. e, L9 a# c! r4 ?0 n; Z
- importPackage (java.awt);( W% B) h7 V1 w6 q5 R/ d( |7 n
( Y9 n: V# r2 k4 w- include(Resources.id("mtrsteamloco:library/code/face.js"));
' `! r4 l( Z* Z( ^6 j9 _ - 0 Y' O) g6 _* |6 T3 v& x
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) v4 ]7 r2 \2 q" a
" s4 h& |$ V2 P# z& ~7 u- function getW(str, font) {
, u7 D$ L8 W$ z/ N4 k - let frc = Resources.getFontRenderContext();
+ R/ s2 P+ n3 H% c+ E - bounds = font.getStringBounds(str, frc);
+ u( w1 u6 o o# O; T8 B% L - return Math.ceil(bounds.getWidth());
5 T6 k. X' c0 _% |+ W: D" {! s - }
! D' ?, r+ u; x# Q& Z @" Q+ { - 1 }& l% v6 R9 ^1 r
- da = (g) => {//底图绘制
1 e; F, D& k5 {. s" h5 n( c - g.setColor(Color.BLACK);
" v) v, U `- Z! m. z2 A - g.fillRect(0, 0, 400, 400);: e% w. u: c0 x6 o% L
- }# Q3 m7 o+ ~- s# m2 A
- 2 i! P8 e/ j; t, H$ _1 M; }
- db = (g) => {//上层绘制: t+ o) Q2 t/ U; ?/ c
- g.setColor(Color.WHITE);
8 P& O- k3 a+ a( l. l! { - g.fillRect(0, 0, 400, 400);
6 k9 V. J6 S% }/ T7 ?0 l, i - g.setColor(Color.RED);
) ~: U" ?; k9 y! P H5 ] - g.setFont(font0);
& y8 u' C. b+ ^; _6 t - let str = "晴纱是男娘";
& C4 t h) `2 y) z3 q- m0 r4 L - let ww = 400;1 k3 S$ A$ T8 b( C8 G5 `: U L
- let w = getW(str, font0);
) W/ [' R6 t' b8 m# w1 W - g.drawString(str, ww / 2 - w / 2, 200);8 |: S1 X9 F' U/ U, }9 N9 P
- }
* [& x) v3 D1 {
. C4 \, ?" m) \( y- const mat = new Matrices();* W# A# b6 q. w
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {4 N/ M1 R3 T5 Q% i/ q% z3 b S
- let info = {
& q. }, k+ ~& W8 f/ N0 h - ctx: ctx,! G$ L" x! g; f, [4 n: d
- isTrain: false,, `' N6 A' T, j; H
- matrices: [mat],+ E! s- O! j5 t7 B4 L$ g& E
- texture: [400, 400],
* v# o. Z- X/ `3 w - model: {, X1 L* M* ^" n
- renderType: "light",; c7 W9 m" Y) B9 n+ N5 N
- size: [1, 1],+ K2 k- Y" r' z4 S# i
- uvSize: [1, 1]
: R$ x; j/ v! y! [. c' V' z - }
+ u. P& y' ]2 J8 L - }5 {% K6 d! w3 r. ^( f" T' \0 n/ [
- let f = new Face(info);" h1 x+ z1 _: ?6 W
- state.f = f;
" E& J4 S2 Z. D0 q
$ c& v6 W/ ^5 j4 t6 n- let t = f.texture;
, ?0 R& `( `7 [5 S - let g = t.graphics;: m# N$ Z# w* F! Y
- state.running = true;
- m+ b O8 A' M1 | - let fps = 24;
3 F" r. x% Q$ t" `2 g F7 B8 @2 H - da(g);//绘制底图% `# r- o/ [4 E2 G
- t.upload();
7 S* n4 \) `6 X4 {+ i - let k = 0;
! ?' Y* G$ C8 u8 w: g6 ] - let ti = Date.now();. J M, `( o& f1 M, X4 X: W+ l
- let rt = 0;8 P' W) J( J# n9 E" h
- smooth = (k, v) => {// 平滑变化 J% p8 L t" {% L
- if (v > k) return k;
5 R) \" \6 I& X' P( _/ Q1 j - if (k < 0) return 0;& o2 `7 i( z x V& B6 R
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 \+ b* l% d5 t) j9 k
- }( F8 d2 R; a5 q
- run = () => {// 新线程
' L/ }4 B, `% d - let id = Thread.currentThread().getId();' E- G9 _ Z$ D x7 l
- print("Thread start:" + id);
8 T( V; |' F0 D! D( p - while (state.running) {+ j/ ?3 S( V9 S& ]
- try {
/ I2 s) W- D- c - k += (Date.now() - ti) / 1000 * 0.2;
5 m) p( X) G" K9 r; y - ti = Date.now();4 }! K0 L+ \+ R5 k& `" O
- if (k > 1.5) {0 j$ ~6 J8 I. F& |
- k = 0;
0 ? l2 J- v% n% X- ]. g* \2 } - }8 T0 w( ~) I# T- V8 L) w
- setComp(g, 1);
' v/ F5 t! O+ C2 i5 l! g q - da(g);+ [1 P; G$ o( e0 j( ~: C
- let kk = smooth(1, k);//平滑切换透明度" k7 U7 `! d6 a5 f' M e I; X
- setComp(g, kk);/ [* C# p; o) `3 K1 d
- db(g);/ e: q7 A2 J' a8 m) k" h
- t.upload();
& D) Y5 d% l0 V; [2 \ - ctx.setDebugInfo("rt" ,Date.now() - ti);2 c" t4 s6 o% T
- ctx.setDebugInfo("k", k);. Y4 u3 F B) z5 n q& K* n6 N
- ctx.setDebugInfo("sm", kk);+ C! G4 l% J0 Y. l" ]
- rt = Date.now() - ti;
( }0 P" t( U: p3 R - Thread.sleep(ck(rt - 1000 / fps));
5 M( ^' N2 o0 m! d - ctx.setDebugInfo("error", 0)
% Y- c! i. s' Y6 r. M3 y0 ? F! g - } catch (e) {
1 U% f5 m/ s+ r9 _* F+ s* ^ - ctx.setDebugInfo("error", e);
( z4 t6 a% ~0 M5 u' e' s5 S8 g - }
1 d) H' u# K8 g0 [5 \ P - }3 F+ F! {7 D# M- f% {4 P
- print("Thread end:" + id);
3 O5 s, U1 j4 I8 E. P - }
( | l" f' C2 l - let th = new Thread(run, "qiehuan");
2 w& @/ R% D% y4 a. b4 S& d - th.start();0 e# M+ m8 C9 V/ s
- }) z) g% @! \: z) G4 h8 W
8 Z5 L' B1 a: z- J: r- function render(ctx, state, entity) {
6 e: @. S& O8 N0 [; K$ W - state.f.tick();
/ K$ j; {* @4 v- T1 _/ X4 Z - } n9 ?. F* b, w, M5 P$ ^! O$ K
. q6 `5 g5 j2 M( n- function dispose(ctx, state, entity) {
5 K& W+ D- c3 n6 w9 Y1 R1 y - print("Dispose");' H7 h3 @5 I+ r7 U8 f* ?3 D
- state.running = false;7 n2 u# r' }6 ]* R1 s7 w
- state.f.close();2 T9 w1 D- K# @6 V+ q9 P# b; j! A
- }
7 {4 u* }9 y& f* U7 h8 X. ^1 a$ @ - 4 I# }$ k. K6 V% ^( [/ T' W4 y% B
- function setComp(g, value) {( `" `1 U* x% E9 [; Q) \
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 g/ `, W5 v* M4 u* x, c: u% M
- }
复制代码 8 K! m$ c- N+ h9 ]# x# D4 _
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 B+ ^: U4 N$ V/ f2 ~
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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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