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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。* I+ B. V/ V7 N
- importPackage (java.lang);5 U! M* ~6 B6 o0 E. f
- importPackage (java.awt);: ~( _" q5 z" q# O+ L# x) u
$ G- d6 J* ?# `: c9 E0 p2 }8 R- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. j- J4 W5 S% _ - 1 `9 e( v0 o! U8 R8 Q8 {
- function getW(str, font) {
+ |) I% s$ s% ]- v( C - let frc = Resources.getFontRenderContext();
; @; r6 U% V8 y - bounds = font.getStringBounds(str, frc);5 ~( R4 F& O+ N- G( a8 \& N: J
- return Math.ceil(bounds.getWidth());8 a# @5 c0 s) S8 o
- }, W5 ]) G! R) s1 A J
/ D% `/ C5 V0 J- da = (g) => {//底图绘制
, l6 Y' m( Z) c5 a - g.setColor(Color.BLACK);- d- E# f& p8 a# M- v
- g.fillRect(0, 0, 400, 400); w! N; k2 H0 t% Q1 n. n8 Y( J
- }
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; f7 V4 `: T; [% J$ w: r- db = (g) => {//上层绘制
- u" _. i4 A1 I7 ]: w - g.setColor(Color.WHITE);' Y( q; O1 ^" D1 |/ U
- g.fillRect(0, 0, 400, 400); M0 J7 e, p4 L5 H- t3 H3 Q6 A
- g.setColor(Color.RED);
k0 T+ ~: S7 Y% n' j9 a - g.setFont(font0);& o, b' [% b1 W7 i# P
- let str = "晴纱是男娘";
; ] u7 Z& p& Q - let ww = 400;
$ u8 o% g' D w* w, X - let w = getW(str, font0);9 u5 M7 `7 @8 t: }* A- l. c, W; L( P9 U
- g.drawString(str, ww / 2 - w / 2, 200);7 `, Q0 n( {" W! J4 P0 I" f: Y) B
- }
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$ s8 w, P6 w% {; l- const mat = new Matrices();# F. [; @- F/ j8 ~ n/ y; [) M8 h
- mat.translate(0, 0.5, 0);
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: T# t0 h. m# ]" X3 `) j) E8 T- function create(ctx, state, entity) {
1 C- j4 X* d. X - let info = {
+ s+ j" Y: W; A/ G# x2 H - ctx: ctx,. j$ k Z' w* Y
- isTrain: false,6 _0 y* v% l( n9 C* y
- matrices: [mat],
. k( g" W! T& U) c5 x H: S. h0 P - texture: [400, 400],
: G& ~0 C! S8 B3 R - model: {8 F( d, v6 i' x5 Q0 ?4 Y2 D
- renderType: "light",; Z) }# _7 I. ` c( r! `( M
- size: [1, 1],
3 e$ G) b# @3 Y' r7 ~# d; W, k a$ @" T - uvSize: [1, 1]5 T1 r1 g$ _8 W1 E1 f9 `1 i& m
- }
3 G* M7 P" q6 K% m9 c - }
- t. }6 w$ M i) n - let f = new Face(info);" l H' p. w6 W( M! S: E
- state.f = f;- x# w0 m7 }0 ^
- " C2 [8 v) n" g" s3 z
- let t = f.texture;
( Z1 m5 \& t0 E8 M( k+ T - let g = t.graphics; u3 s) u' {4 S/ D- f: C0 w$ e! @
- state.running = true;8 |' m: A/ h7 z% g: p9 P
- let fps = 24;. p! }- r8 h% J& a$ N
- da(g);//绘制底图* l2 J& I% e2 E; V! S
- t.upload();
3 {$ ?7 x+ R2 x5 [1 ^ - let k = 0;
2 `! }: G, l& Y8 S - let ti = Date.now();$ R% {; J9 A+ j
- let rt = 0;* C( m/ b' o( r) R( p3 i
- smooth = (k, v) => {// 平滑变化
" w% n4 ~3 C- D# ^) K6 f - if (v > k) return k;
% |" a; B9 q! F, R- Q+ A1 H7 M3 | - if (k < 0) return 0;* N" ~5 K* o) _7 L" j
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! S) A1 P: S. k0 t/ b
- }7 j) ^# _/ {) I5 Q* U2 h; s
- run = () => {// 新线程
( d) K: `7 U2 e9 X - let id = Thread.currentThread().getId();
" A9 G' u; Q1 l. h8 c6 m# w; }' S: H9 V - print("Thread start:" + id);* q$ @/ m& \( B7 o B Q9 m1 |
- while (state.running) {
* E& U3 b# w0 ?% \+ x' [ - try { |4 }, @, g9 }3 n* h, F7 {
- k += (Date.now() - ti) / 1000 * 0.2;+ l7 O% X- b3 r3 H5 X
- ti = Date.now();
; [& n6 \ ]! Z5 a - if (k > 1.5) {
% [& e. \- O c) z: L - k = 0;0 W/ z# ^. u# v8 D3 ?% k1 X
- }
% [4 _+ O2 x, [1 \; f8 n - setComp(g, 1);7 c: v" `0 F, U$ j' h
- da(g);7 O9 \( s C- y1 P
- let kk = smooth(1, k);//平滑切换透明度
2 F% G8 H% p$ L! c# c - setComp(g, kk);
: c# t5 K( a( D' H - db(g);: B- P/ S) ~ I5 k' r
- t.upload();
6 v* H c, m& p7 _7 z7 M, x" L - ctx.setDebugInfo("rt" ,Date.now() - ti);1 m5 ]2 j2 X8 y1 {
- ctx.setDebugInfo("k", k);, o: b7 E& T, ]; U+ T+ Y! s: {
- ctx.setDebugInfo("sm", kk);) _' n. R, v& A
- rt = Date.now() - ti;3 t1 @& u; S9 ]5 V
- Thread.sleep(ck(rt - 1000 / fps));
8 N6 V3 @% x# M" t) b2 g* X - ctx.setDebugInfo("error", 0)0 G% ]( F, n; n7 e. ^
- } catch (e) {+ u4 U* d. K3 C5 d J4 p6 x6 O
- ctx.setDebugInfo("error", e);+ J# a+ @: Y: R) ^6 w3 j
- }* N% |5 g" x$ l; b( B7 r
- }! l: F2 U( o9 k0 E
- print("Thread end:" + id);4 n S9 Z# q% x" j9 M) P# Y# i
- }7 ^" t' o# B, l% u0 x) K6 O
- let th = new Thread(run, "qiehuan");
3 h" M# ^" g( M2 G/ O# j - th.start();$ J3 W# z+ p H
- } Q {' t2 v. _$ A4 ?/ c
( _0 c/ j M' k+ ^- function render(ctx, state, entity) {) i0 R4 \' u+ u X+ R5 W
- state.f.tick();
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- 9 F, ^% ?: A/ I( c6 I* T N
- function dispose(ctx, state, entity) {
* x, D# O H% g6 m1 F, o8 d2 ] - print("Dispose");
/ o. H8 h( ?1 h+ [+ G6 R! F- m - state.running = false;% T8 j! G( I3 Y& i! W
- state.f.close();# T: h& s/ |7 v) E; B1 V, H
- }
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- function setComp(g, value) {
' G! C' f% W. I# x: r - g.setComposite(AlphaComposite.SrcOver.derive(value));
( V( Y2 n9 D+ q1 ` - }
复制代码 3 G5 T/ y! j7 l* d1 E
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)& B& t2 d4 _3 p9 |: w
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