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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。: A% D( } u4 d" @7 {. p" A% ?$ _
- importPackage (java.lang);& }# _1 ?5 H8 o
- importPackage (java.awt);
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' T; L7 W: s8 H- include(Resources.id("mtrsteamloco:library/code/face.js"));2 T' l. R1 W' o6 X) t4 i) V1 X# M
5 K* r# P1 D% ^' O0 g7 g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
' p6 f4 B* f; I0 a( [1 M/ \ - ! @% D- f) ~' n) {, d
- function getW(str, font) {& C! V3 ?6 k# j# I+ n5 D
- let frc = Resources.getFontRenderContext();
4 r# m3 i$ E `" }. [0 o2 v( Q: J - bounds = font.getStringBounds(str, frc);
. z& v( p3 y. U/ r2 M; q2 {1 a - return Math.ceil(bounds.getWidth());5 E6 f" e7 l( ]$ j6 z5 ]
- }; b# z( G- R$ w+ L9 \1 R
- % U6 w/ u8 o% _: ~8 `' c3 L
- da = (g) => {//底图绘制, p& }# E4 s' N% H" X/ O! }
- g.setColor(Color.BLACK);
0 m& j! L4 p3 T6 i; A4 s1 j+ x9 m - g.fillRect(0, 0, 400, 400);# l+ u# ?8 n1 M2 n" P' E
- }
) _7 t3 D5 K; u" a* a - / {3 p/ w7 ~; I+ ]: x, i( U
- db = (g) => {//上层绘制
3 P. H( e0 l8 ^( O" b- C5 P - g.setColor(Color.WHITE);
2 p3 [* P$ @- J0 B - g.fillRect(0, 0, 400, 400);; x, ]& t5 j5 I3 a$ P$ K9 ~
- g.setColor(Color.RED);
' P# N" }$ L p7 |: X0 `1 c0 d - g.setFont(font0);8 l/ w& D3 p! I! |1 X/ P# Z$ a( \( ]
- let str = "晴纱是男娘";
! e+ D: ?$ V3 B+ v' w4 G: N' D0 V - let ww = 400;* o! [7 ]5 q9 o2 H( J' ?; P
- let w = getW(str, font0);" t e& [* f: l) i. M8 {
- g.drawString(str, ww / 2 - w / 2, 200);
0 B2 N- r) M) l5 E' g8 g* n - }
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- const mat = new Matrices();+ G9 O% r1 A! d2 `8 n2 ^9 M
- mat.translate(0, 0.5, 0);" G& r* L8 g- i8 u" f8 n) M
' Z- j% f* E- j( m, T2 L0 D- function create(ctx, state, entity) {! Z( D( N3 E' ?# m
- let info = {
. c# Q2 n- M1 {$ i8 G; s - ctx: ctx,8 I) X: p- U2 f9 h
- isTrain: false,
5 e0 _' d/ h% w, }1 Y" k, Q - matrices: [mat],5 ?7 u4 N$ o5 \2 w( X* @0 h; d9 w
- texture: [400, 400],
2 p. g/ Y/ ^# E. |% j2 J - model: {' E" h0 }4 l- E) w1 s" e9 h
- renderType: "light",' N/ R* ^0 E- e: F, |# P
- size: [1, 1],
. t. A' v( ^. K9 W2 G7 ]& e) X - uvSize: [1, 1]( _7 o- G# ]4 J2 \3 F! r6 ?6 ~
- }
3 v2 W U; L3 _$ ~ - }
; r7 n1 Q4 i/ A: v - let f = new Face(info);
; B x5 U- k3 I* G' ] - state.f = f;
% f- n. H( I- Q7 @ - ) ~! c) s8 c( l1 g5 T2 A
- let t = f.texture;
# j& y0 h7 D. i% }1 J3 z) H, T" Z& w - let g = t.graphics;! k+ Q: w9 j! A) a1 q _( D
- state.running = true;5 J; ?% O) K/ W( W) H
- let fps = 24;
8 `' w, c# s8 L - da(g);//绘制底图/ g8 ^9 a8 g: X' O' o0 q
- t.upload();
+ i& U% {2 i! U) Y5 o% V - let k = 0;# v3 V. E- Z8 q! {) C2 `0 K" o( F
- let ti = Date.now();6 n7 E2 k7 I& A% r: ^
- let rt = 0;
) p1 R: G t& y/ H6 P+ w - smooth = (k, v) => {// 平滑变化) ^8 l! V* k P' X: m' Z
- if (v > k) return k;
1 {9 O7 U( E0 d% Z1 M+ m [# o9 X; @ - if (k < 0) return 0;" @% e7 ?# g/ M/ O6 `7 W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
) q9 p& i$ [% q9 G; J - let id = Thread.currentThread().getId();# U8 k. ?/ R( i% _2 _
- print("Thread start:" + id);2 g, H3 J9 v0 u- h; v. e
- while (state.running) {- `; L9 k) I( U7 ]9 {
- try {
; Q5 C* B' P5 h# U& j - k += (Date.now() - ti) / 1000 * 0.2;
: M! {2 x: c2 M# G7 }, ?! Y4 F* C - ti = Date.now();9 V) n6 A- u; h
- if (k > 1.5) {( S3 r x% y% y; k& Z( Y4 \
- k = 0;+ N7 _* r) G% Q
- }( i* |" C2 U' p2 C/ k
- setComp(g, 1);
+ A' z% R5 B1 e6 g8 b6 q - da(g);" C- Q2 r7 y2 n+ X: t4 g
- let kk = smooth(1, k);//平滑切换透明度 j* M3 L$ \9 `3 k% |4 M: U5 \
- setComp(g, kk);, Y; ]9 H2 H* C0 |7 z& n
- db(g);
8 ^8 ]6 R* c* b( f8 r( t - t.upload();5 I! V1 ^9 c( y( i' K
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 |4 P( j5 ]' i% Z( G; Q
- ctx.setDebugInfo("k", k);& n i/ t5 Y' r0 o
- ctx.setDebugInfo("sm", kk);0 G9 Q2 {* C0 g: }2 S! e! o
- rt = Date.now() - ti;
( |: i, f4 L" |' t8 X - Thread.sleep(ck(rt - 1000 / fps));
1 z% [; x/ H& s - ctx.setDebugInfo("error", 0) Z! ]% X- u. B6 i- o7 v1 F, o
- } catch (e) {
8 D6 c; r- L9 w2 c/ E% S, E. w - ctx.setDebugInfo("error", e);
: ?! f: _/ h% e) ^" j% o - }
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- print("Thread end:" + id);
" ^! M# V8 R/ S2 s0 H - }
: c7 X% ~4 X6 e' \7 B) p9 F - let th = new Thread(run, "qiehuan");$ @$ L* m# U/ A1 p6 n" H4 f! d
- th.start();, p7 n1 H5 I, d) S( ?: C' t; ~
- }. s# w5 }6 U2 H: B
- C F& c: Z8 v4 U6 B! j- function render(ctx, state, entity) {9 Q T1 ^5 `9 [) ?3 d6 ]4 g
- state.f.tick();3 r* Z% x2 ?' f; q4 @2 w# o. t- i
- }
. m3 M9 e. z/ d - ( a4 X( n% z. c# v! [
- function dispose(ctx, state, entity) {
1 C$ S, \9 o: x$ \# d6 W6 Y - print("Dispose");
9 o) B& l' x; b* Z- U7 x - state.running = false;
, W. M# E# r& B! g3 l6 ? - state.f.close();4 e+ {- J P; r- ?9 K, e
- }9 s' P9 }- W {& Q2 J5 F) j
0 l& L+ [# F4 ^% X- function setComp(g, value) {5 e1 b% ?% i" n) C# o% j% [
- g.setComposite(AlphaComposite.SrcOver.derive(value));
' v' @! @1 h+ K - }
复制代码 - p6 a, j3 y# `2 X
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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8 M) |: w: {* Q* z$ z5 J; X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 ?5 d3 Y, f/ H/ C: ^9 H6 l9 p
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