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A$ z2 j- }3 K( _! E0 b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 d" x% ~9 M; u6 s n7 N% [
- importPackage (java.lang);: q) c* j, u& \% q/ Q
- importPackage (java.awt);' _. M( E+ y+ W$ {2 _; c
9 @0 @. i, P1 D7 O) n! p, z/ H- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. T$ y5 r4 t$ `+ [ x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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) O6 I( P( u/ s0 e9 g7 ?+ t, t0 V) @- \- function getW(str, font) {- a9 N6 w, z3 b
- let frc = Resources.getFontRenderContext();
# I" u& K2 ?( i8 A0 s - bounds = font.getStringBounds(str, frc);
7 I3 J7 K$ I; K* F# c' S) ]5 G - return Math.ceil(bounds.getWidth());
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) I( A5 c( f4 w. T- da = (g) => {//底图绘制( V+ K9 A, W# l% ]+ j/ L; A
- g.setColor(Color.BLACK);
2 s* |' r( }0 M7 M& P4 z) l - g.fillRect(0, 0, 400, 400);) W# A# S: U9 W; w: S3 c% G1 F! S. l
- }
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- db = (g) => {//上层绘制
. c0 Q: t" D' S - g.setColor(Color.WHITE);$ p1 o! L* d1 e4 I: y% G
- g.fillRect(0, 0, 400, 400);- d( E( _1 [- s- w+ I
- g.setColor(Color.RED);
% u% p% l0 K: ?- \9 @ - g.setFont(font0);* o# J# t( \1 V: D
- let str = "晴纱是男娘";
- i# s" t3 Q1 Q% z* d - let ww = 400;2 U% L& s" _2 D/ w+ H2 [, }
- let w = getW(str, font0);* O" C6 u& \0 j, R; }
- g.drawString(str, ww / 2 - w / 2, 200);5 G; G3 H Q% I
- }
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- const mat = new Matrices();
4 n( z, I$ D8 t+ @. k P - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {/ a( L! j( h" ?% H2 q2 }4 p$ W
- let info = {
8 j/ e+ F% K$ K - ctx: ctx,! i @- y0 m3 A' W! i
- isTrain: false,
, K8 ~0 X2 F1 A - matrices: [mat],; g( M; t* P s) _' {
- texture: [400, 400],# L! j. L' C9 t9 w
- model: {
" Z8 o* q+ W4 \! o6 \! u - renderType: "light",
8 c( a3 [* K% [) j. @ - size: [1, 1],( c. w9 ^2 k! |% U" i. Z
- uvSize: [1, 1]2 |! }$ V" F+ q$ B% U( A" \
- }
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- let f = new Face(info);
1 g* Y' \7 `7 |" S D1 V1 K$ R: ]3 L! b - state.f = f;
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- let t = f.texture;+ R4 f2 E' y9 ~2 m y4 E0 U2 [2 @( Q
- let g = t.graphics;
r! b4 M" b8 S. C/ y2 p - state.running = true;: I; X0 E6 Y A$ E. _/ V; H
- let fps = 24;
1 M4 I& |3 F, o) m. ?, ~ - da(g);//绘制底图
/ [* P$ O) c( } M1 S+ j# _" c - t.upload();
& }+ a$ b0 a3 Z( ^* E- r - let k = 0;7 e: O6 q1 T& O8 N8 Z' J
- let ti = Date.now();
) K6 O! j5 A! v6 o7 v% T- f - let rt = 0;
. e% \$ b# r( y8 U4 I1 y0 D) t2 T5 b - smooth = (k, v) => {// 平滑变化
4 J* \6 O; H* @) ?! ~3 w2 q4 e - if (v > k) return k;9 c% g7 u; _ C! Y' z1 W8 ^
- if (k < 0) return 0;$ d/ l; H% W# S4 O7 W* Q6 a' B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 a( M- ?- g0 j3 d8 i; G2 K8 i" M' Y8 H
- }
8 T! P' l, ^7 `8 |: p - run = () => {// 新线程" \6 T6 f6 f4 K! \+ P% j
- let id = Thread.currentThread().getId();
2 _# S7 f% t, \6 \ - print("Thread start:" + id);% d w/ k5 f6 C6 q N( w8 L1 F
- while (state.running) {2 L3 V2 S6 V5 @& Q8 \& {
- try {$ V9 z$ h- N* I5 f
- k += (Date.now() - ti) / 1000 * 0.2;2 S0 ~5 l0 j1 ^! P6 \( i8 }4 i/ ^
- ti = Date.now();+ ^- I( ~! c( W1 l
- if (k > 1.5) {
! y0 J1 T* J. B8 K/ `3 j& i - k = 0;1 H/ V1 \" i- @
- }
$ }/ m8 `2 Y5 ]. G, d - setComp(g, 1);6 M9 Q5 s- d2 w2 [; A
- da(g);, u; ?; v9 t: r4 H K# ]& Y! O: ^
- let kk = smooth(1, k);//平滑切换透明度) R! n) Z; R2 ]* D
- setComp(g, kk);
( F% N9 F k9 z - db(g);% S: ?& C- W, {5 B
- t.upload();
6 o6 s- I9 U9 F1 d$ \ - ctx.setDebugInfo("rt" ,Date.now() - ti);
' x# @1 [. D: z) M5 s1 a - ctx.setDebugInfo("k", k);
7 ~. p# P' H! p" G, ~ - ctx.setDebugInfo("sm", kk);0 x* Z y C, k+ \; t
- rt = Date.now() - ti;3 F% T$ F! L$ J6 n1 i
- Thread.sleep(ck(rt - 1000 / fps));9 O% l. O- {9 @2 p: L
- ctx.setDebugInfo("error", 0)4 h0 k+ O$ C0 T+ R
- } catch (e) {# L3 C5 x" q/ N; N& M; M
- ctx.setDebugInfo("error", e);
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" V: `. |7 i5 A - print("Thread end:" + id);. _: v6 L% Y, Y1 t( k3 E8 Z' K# k! j+ a
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- let th = new Thread(run, "qiehuan");
/ {# V& U0 y: J" A0 v# Z V4 ^ - th.start();
- ]- |' g- l- o+ y$ J! t - }
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- function render(ctx, state, entity) {
1 f* l% F% ~1 F/ I - state.f.tick();; c& P. p% `9 b
- }
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- function dispose(ctx, state, entity) {
6 E( |9 C' ~: D' U6 x5 Z - print("Dispose");
- ]# |$ H# P ?9 Q9 ~! l - state.running = false;$ q; Z5 |/ S0 Q7 X6 y2 I, D
- state.f.close();" ?$ T7 r+ O# a, S4 [1 S8 D
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+ u0 U$ E* t' U ?- C' K- function setComp(g, value) {
/ E' }9 v% `1 |+ X2 i - g.setComposite(AlphaComposite.SrcOver.derive(value));3 ] } a5 R" M: l2 W; i1 n( p
- }
复制代码 5 G) f3 u, G( V
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)( A, V- i6 S' d0 @8 J
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