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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。8 R5 w O$ g9 l/ ?0 ^; O
- importPackage (java.lang);3 g, I4 f) ~& h; e
- importPackage (java.awt);+ t- C! H+ j Q+ a
9 v% r) n( n0 O- 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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. g3 F& W! V! j/ w" t, k% }9 v4 q- function getW(str, font) {( X8 ?% B1 v: G' x1 y6 Q5 |
- let frc = Resources.getFontRenderContext();4 c, X" c4 R+ e" W$ I
- bounds = font.getStringBounds(str, frc);
, S" Z" X5 X2 H. G - return Math.ceil(bounds.getWidth());( m# P. h) l. W/ y- q
- }
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- da = (g) => {//底图绘制4 S: f, A! {& r6 M+ }$ q7 e
- g.setColor(Color.BLACK);
/ H0 l! X9 ?" y: g. X - g.fillRect(0, 0, 400, 400);! i+ s9 L7 T$ L; T& P
- }% J0 h) o9 H/ A" I- E) m) U
- # F. J+ s' y7 l, u* H
- db = (g) => {//上层绘制' R& z+ }' @* }
- g.setColor(Color.WHITE);
' e+ O }! q) Z8 f9 V - g.fillRect(0, 0, 400, 400);
# [; R4 y. o8 U* Y - g.setColor(Color.RED);
9 A: y5 j, i# O5 d - g.setFont(font0);5 b' `9 F3 j0 }1 j
- let str = "晴纱是男娘";. i2 ]- v/ {$ x" m1 `( T3 N
- let ww = 400;
4 F& a C0 W$ G2 _9 w# }$ M1 ^4 j+ b - let w = getW(str, font0);
0 d* x" D3 d! q6 _$ G! U* f6 b - g.drawString(str, ww / 2 - w / 2, 200);/ T% m% D- _) x$ u% E0 |/ J1 p- h
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0 P, D$ ^( b$ h3 ~3 m$ @- const mat = new Matrices();/ M5 M) ?% ^2 D |
- mat.translate(0, 0.5, 0);) ?, i: P# b6 b3 m! G
2 |5 }, ~- X- ?9 V2 ]2 n$ F- ` v- function create(ctx, state, entity) {7 m8 s+ y% @ n2 ~6 t+ l
- let info = {7 G+ l0 {& Q* P# g+ M% c
- ctx: ctx,
% S4 i1 {' U! y- i! o( d$ w( E& } - isTrain: false,
3 A4 Q, q) `, { w+ P' } - matrices: [mat],
/ c% e& I% ^, d B# D2 ^$ e - texture: [400, 400],! V3 a$ A$ e/ J g$ ?
- model: {2 |- k) U* S" Y
- renderType: "light",
% i* H# p7 g9 v. o' n - size: [1, 1],
+ H" Y. P1 A4 A - uvSize: [1, 1]! Y$ s( n8 n2 ~4 N% f" j
- }
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- let f = new Face(info);, [: M0 r- P. d0 J+ P
- state.f = f;0 Y/ a1 j# U3 h+ |, s
2 D8 A$ a K6 \- let t = f.texture;
1 ^; Y4 W9 g5 a( ] - let g = t.graphics;
; x+ ~" L2 W. d - state.running = true;
7 L! f0 Z6 \. `$ U - let fps = 24;
; Z+ @( J6 t& Z4 J% W - da(g);//绘制底图
( y1 C9 `$ q' V8 y+ ]6 e: W8 ]9 w - t.upload();
2 e0 p; S( Q4 J! S - let k = 0;
2 Z8 P6 G& E" J+ k6 c; z7 O - let ti = Date.now();
/ g: v: C( [0 h* A y: T" \ - let rt = 0;
. _& o) F! | K! y1 ?8 i5 I - smooth = (k, v) => {// 平滑变化- N$ k: w+ q$ S `' b! j L
- if (v > k) return k;
4 r4 ?$ ?# \% o" x! h: E, g - if (k < 0) return 0;. r. W* y$ q6 ^( D" T" V+ @8 D( }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 {, J( B* ?; k) U6 ~ q
- }
, [) k+ K8 J7 R$ p3 ?/ Q - run = () => {// 新线程& L4 }# P* T9 C# \( M R1 d/ W5 }
- let id = Thread.currentThread().getId();
8 q: P V1 n F& G" s! Y% c - print("Thread start:" + id);
* o# b# z6 x M$ U - while (state.running) {- }8 @: H, ?8 e. t0 M5 C Y5 \
- try {
. ?" ]- V/ U" B/ V7 x M - k += (Date.now() - ti) / 1000 * 0.2;4 {2 `. o; Y; h9 f1 A6 {* [; L
- ti = Date.now();
0 e8 E9 {0 X1 Q& | - if (k > 1.5) {
$ D# p1 i( o6 G6 H9 c; W( p - k = 0;3 d/ r% b. [; e3 @0 j! _; \) H+ M
- }/ K# G; b- H- Y; P5 N
- setComp(g, 1);
/ F0 H P, x9 L( @" D/ {# T1 C - da(g);
; Y! r# b5 A; @ - let kk = smooth(1, k);//平滑切换透明度
) {; \; o% _ {6 x - setComp(g, kk);
; q/ u# {( t) d4 w. ?$ X8 R - db(g);
, f7 t4 \7 m7 S- Y9 {6 T. ? - t.upload();
& K: R1 r( g! K) H - ctx.setDebugInfo("rt" ,Date.now() - ti);
& N8 ~% L2 r( B8 T9 b - ctx.setDebugInfo("k", k);8 Z5 F- m9 s4 b5 Y5 |/ p/ S9 a
- ctx.setDebugInfo("sm", kk);
0 w9 [ ?3 y3 ` m - rt = Date.now() - ti; w- A# G: @. P! A# J. T% k% ^
- Thread.sleep(ck(rt - 1000 / fps));
1 @- f$ U: C# l& L - ctx.setDebugInfo("error", 0)! z% F3 k$ }, a
- } catch (e) {
9 D: S2 C$ k- w# J- t - ctx.setDebugInfo("error", e);
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- }
/ M- y6 o5 L+ N1 r2 k - print("Thread end:" + id);
* |, c' L( D) a1 _8 V" i- r - }
1 H* ?7 d0 \, o - let th = new Thread(run, "qiehuan");
, @" Z" T1 G* K- ~; k6 \( c - th.start();
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- ^1 J% Y5 r0 a% R2 o5 y- function render(ctx, state, entity) {. k0 H7 h. y' h
- state.f.tick();
/ f# Z5 _! |1 ^5 _" \$ L - }
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# \ B" O8 t3 h1 H& B5 q; Y# }2 ^5 I- function dispose(ctx, state, entity) {+ p+ N* s2 z& e. X7 X' j1 N7 J
- print("Dispose");
# s# K1 J+ e$ o, X7 L. I/ H2 z$ H: a - state.running = false;, j, O/ O( o8 P$ b2 a v: \# f
- state.f.close();
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- 7 A8 n4 t' ~5 @: a+ B N9 A
- function setComp(g, value) {
- g: j, e- o/ Z6 E: K3 t6 v8 o' m5 a - g.setComposite(AlphaComposite.SrcOver.derive(value));! S d; n/ F" c: l1 w) j
- }
复制代码
( `! K. _$ ?0 W$ 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。7 H/ E" Q/ t3 \ W
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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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