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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。( f9 O/ C! \9 E! r
- importPackage (java.lang);. I7 Q1 Z5 ?7 [% S! Y6 Q
- importPackage (java.awt);
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2 n( ^) [, R& D5 T, ^- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; {& A3 w* t/ r% C D- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {9 d( ^8 ^, j) z" M9 Z8 Z; I
- let frc = Resources.getFontRenderContext(); `/ C$ c1 F: I6 T5 z5 |
- bounds = font.getStringBounds(str, frc);
. l: C+ D7 x4 k9 c" F3 d0 o - return Math.ceil(bounds.getWidth());% q& k2 G5 e4 }
- }
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- da = (g) => {//底图绘制& R( m/ e$ K* e1 x3 V
- g.setColor(Color.BLACK);
8 N$ b0 t: k' X6 S4 @ - g.fillRect(0, 0, 400, 400);
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- ; r/ u+ m: h/ j; H6 j9 v
- db = (g) => {//上层绘制! v# E; I) }0 B' }
- g.setColor(Color.WHITE);( V5 c; x3 y# y7 q" k
- g.fillRect(0, 0, 400, 400);
4 O# ?( F1 ^! P7 ^- L% u+ ~( O1 y - g.setColor(Color.RED);
. z4 _" m1 F/ q( X - g.setFont(font0);$ X3 {8 T# e) o. e% ?+ X' l
- let str = "晴纱是男娘";; V8 @9 S5 [! k3 c4 h$ F! @
- let ww = 400;
- W' n; v( h0 W- m* z2 T/ n; f& \& r - let w = getW(str, font0);. K3 z3 R( K6 A5 r
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
9 w0 ~6 M2 I7 x" u0 H+ B6 ~ - mat.translate(0, 0.5, 0);! |7 |( s0 n8 f" D Q, _& Z6 F
- $ ] ], T6 b6 ?3 `2 N8 L2 t b. {
- function create(ctx, state, entity) {4 b2 Y- e7 K" p& f+ B
- let info = {
9 w! S7 P% f: @8 X; p - ctx: ctx,6 b9 G- d; g; [
- isTrain: false,2 z* ^4 }8 u4 E2 v- T, R
- matrices: [mat],; l9 v. H) K5 ^ w
- texture: [400, 400],
, x* x1 W8 o, ? - model: {6 t4 v* x) Z( u, F
- renderType: "light",
2 \0 z( ~: C! A/ G/ x1 r - size: [1, 1],
' x% `4 w) }0 O5 n5 ? - uvSize: [1, 1]+ x4 D+ D: n6 I7 H. c
- }) j9 W+ R& ~& R7 r6 P
- }! G! Z0 h+ H! F4 z, Y7 y- z
- let f = new Face(info);2 j* ]9 H6 x+ F4 p5 u" d8 w
- state.f = f;
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7 `1 p9 J' r! [6 {* R3 Y- let t = f.texture;! A P/ `* v. |0 W: t& @8 D+ ~; T
- let g = t.graphics;
l- P9 q, ~2 x) @# B5 W - state.running = true;/ @) ~! ^( _ z/ d/ H
- let fps = 24;
- q0 @; { S6 r4 ^ - da(g);//绘制底图
9 D4 W" Q, O2 x; c7 b9 y# l - t.upload();
( ]1 f2 ` p9 X# L F0 R/ B7 P/ ^ - let k = 0;( Y) T: i2 C/ G8 `' z' t- l: S9 L# v8 D
- let ti = Date.now();' [ x( `1 G( N5 p! P5 v" T& j
- let rt = 0; H& O% j- g$ Z' F) ]
- smooth = (k, v) => {// 平滑变化; g. E9 B: y. c
- if (v > k) return k;
- e& m( T' \" L- L/ H - if (k < 0) return 0;
0 B% Q3 [. D4 w8 C, w2 } - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# I7 R- P( C( l - }
Z; e5 ]. w' B3 Z2 a - run = () => {// 新线程3 d" f1 T( j! G, m0 F: J1 v5 [
- let id = Thread.currentThread().getId();
0 h- d! l' ?$ w! n - print("Thread start:" + id);
1 \8 T; o2 ^" }. _ - while (state.running) {% E1 R# Y' [: w8 A
- try {
2 p, `1 `# u4 T* L+ d - k += (Date.now() - ti) / 1000 * 0.2;
' C( d- b c/ B# P - ti = Date.now();9 j4 @; F' g! e+ X" N( u
- if (k > 1.5) {
0 P$ N' |+ x: j3 x8 w - k = 0;, D# Q" N& R% D3 ?- b$ l
- }5 `% \6 s* S ^. S2 _: @0 J
- setComp(g, 1);
# P+ L- z; k9 n# `/ C1 r; I - da(g);
% k6 l+ `7 y5 G4 A4 F! m - let kk = smooth(1, k);//平滑切换透明度3 \3 i8 U3 h/ S# ` z* b
- setComp(g, kk);
6 U( ^' d9 F# K8 O' g, ?* P - db(g);
/ i7 Z2 e& E4 U. s! ] - t.upload();
8 `3 J6 \! c w$ G; R `4 e - ctx.setDebugInfo("rt" ,Date.now() - ti);8 n* X- Z( B6 M6 B" U0 Z" o( m
- ctx.setDebugInfo("k", k);
7 d# w$ g- V+ ^7 i R% c0 X. |9 q - ctx.setDebugInfo("sm", kk);- x: f0 Z3 w8 Y# B5 k7 G0 o
- rt = Date.now() - ti;
' L. P1 c {: @: } - Thread.sleep(ck(rt - 1000 / fps));6 V, h$ V7 v0 f/ Q2 i
- ctx.setDebugInfo("error", 0)
+ p$ M9 p t' w/ @. g% j - } catch (e) {
2 n6 u" M; B! J: C - ctx.setDebugInfo("error", e);
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- }
3 `; U9 R& d7 g b+ k% C+ s# a/ ? Y - print("Thread end:" + id);& h+ A7 F, ]0 M; | l
- }
+ b/ V) W3 H8 G7 M& n+ E - let th = new Thread(run, "qiehuan");% t6 g J/ Q. `3 P% n
- th.start();" i# o, s- x* \( D/ _' V
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; |: H/ U( _2 w7 }- function render(ctx, state, entity) {5 q; F9 R9 a! L/ L# u7 j
- state.f.tick();
% a4 Z* v$ h% z" W+ }+ r - }
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- function dispose(ctx, state, entity) {4 z# C! h8 n7 ~9 V- Z* w
- print("Dispose");6 M; ?3 P( K+ R, ?
- state.running = false;
( o! e6 g$ K+ T v/ t, P% B - state.f.close();
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/ w) O% B9 n/ z+ T- function setComp(g, value) {8 C5 v; d D4 x3 U5 d! U) r
- g.setComposite(AlphaComposite.SrcOver.derive(value));, t% b& m$ @9 f1 e2 N
- }
复制代码 * h. l0 L) X! ?6 ?1 Y/ o: U
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), t) R' i" {6 z% j: d
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