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9 ~2 e) l' w. U) f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。* n, D3 n! E. m' F' [
- importPackage (java.lang);; B1 O" I( z5 o2 l8 U
- importPackage (java.awt);- D. R; Y& h/ z' ?
- ; i3 b d/ Z5 }- R4 S: c8 `% M
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( f7 S* V# [0 U+ Y. D' f. B1 H \
+ h, r& [ T6 f& t9 P" W2 Z- function getW(str, font) {
$ R* k! G3 `" N7 g, X1 N' {/ J - let frc = Resources.getFontRenderContext();
" w# M: v. k6 h6 @- ^ - bounds = font.getStringBounds(str, frc);0 S+ m6 @6 l& l) W# O/ @) N2 H& i
- return Math.ceil(bounds.getWidth());. h; |8 N9 W0 t, q }3 h' J
- }
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- da = (g) => {//底图绘制7 m; s, l" K4 q
- g.setColor(Color.BLACK); G) c$ \# |; q% W, Q2 M3 x! l9 ?
- g.fillRect(0, 0, 400, 400);
7 t' f% q( p/ O! e: q {% x - }
+ K% f) |8 D2 }5 n0 O. z - + ]) ^, t( T- j- M$ y6 B
- db = (g) => {//上层绘制
$ }1 |* k1 m! F. q! B, Z. k - g.setColor(Color.WHITE);& y) i* d1 X2 V8 v
- g.fillRect(0, 0, 400, 400);) e7 C+ n8 O. M5 P4 W* _
- g.setColor(Color.RED);3 C" i+ n5 g3 \! r" b% o
- g.setFont(font0);# [! o9 X- E$ V5 D* o& ^
- let str = "晴纱是男娘";7 u" J$ U9 U9 }
- let ww = 400;
! K% j" G$ S4 E- H6 E( h. s - let w = getW(str, font0);
5 q2 H* U+ X# x# Q6 h" m - g.drawString(str, ww / 2 - w / 2, 200);" p$ [7 z; ^+ H# d V# V
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- const mat = new Matrices();
& U* A9 ?2 n, O: b Q4 d* d) ? - mat.translate(0, 0.5, 0);
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0 K( N* F4 K, H+ U2 l- function create(ctx, state, entity) {' K3 i! h+ M. F) C# B% S1 ~
- let info = {
- O# t/ b# N& K - ctx: ctx,
6 I T( }+ P0 ]( A4 d# |$ t) G - isTrain: false,& c6 i) }' t2 n6 R& ]$ R
- matrices: [mat],+ Q9 b. Q- v# i q6 v
- texture: [400, 400],7 @- t9 P5 A4 |3 I5 O
- model: {$ {; d! @; b% M q0 t% U/ z7 \
- renderType: "light",% |5 I [# T' H+ m
- size: [1, 1],
3 |) n9 B+ ~* B# M: s: B' v - uvSize: [1, 1]5 b$ z9 e9 y3 n% F6 Y
- }
* i# ^ l: z5 @; o - }
7 b) }: p2 n9 H( Z: @1 m/ p$ U - let f = new Face(info);: s' f( ]: G4 @' |" O3 h
- state.f = f;5 ~+ i& |2 b/ F: b6 A$ _4 x
, l9 c9 j$ b3 \( I6 K3 [# I- let t = f.texture;
# a8 j' Y$ P) F% J; K% b/ a - let g = t.graphics;0 v' v- U# I" u8 ]
- state.running = true;( N' h6 U% M# |* z- X! U4 s
- let fps = 24;; r2 w }9 K9 x. J+ P! l8 z- S
- da(g);//绘制底图
. R8 ?; C. V+ G# v8 K; L - t.upload();- Y4 N" U' P7 b, D1 _ L
- let k = 0;
/ E' ~8 ?0 O& Z6 p6 Q - let ti = Date.now();# Q, Z8 @% l7 k( g2 w% U
- let rt = 0;
' e* p0 O w& r! I' O - smooth = (k, v) => {// 平滑变化
' x1 ]5 l0 g5 O4 b* C - if (v > k) return k;
! U7 v% u+ \: e: J- T2 E) u - if (k < 0) return 0;- r" h% \' S& T% u. V% d- O
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
9 Z, o! ~( k( M - let id = Thread.currentThread().getId();
! B' L/ K9 y4 d7 Z% _) ~ - print("Thread start:" + id);- W1 |$ S+ g8 }4 ~) |
- while (state.running) {
# T1 p9 |% `# l6 p - try {5 a4 C% |+ ^/ \0 x+ [
- k += (Date.now() - ti) / 1000 * 0.2;
K0 \2 Z m5 f" L# P4 H, B5 }% Y - ti = Date.now();
3 ?$ O" j* P( T, G; c! x - if (k > 1.5) {+ D. T# @' e$ u3 ?. R c7 t/ t
- k = 0;, k9 c8 K ]7 I
- }
0 m# I/ v M; Y* [- | - setComp(g, 1);
7 x, y* o) C- B( d& F7 ?$ F - da(g);( C7 a1 X6 j& d' S
- let kk = smooth(1, k);//平滑切换透明度' M& w7 J+ P' g& D7 Z% p
- setComp(g, kk);
$ C2 P6 p- V. q8 ^: v0 r2 \ - db(g);
: y5 q1 u. H( C/ M - t.upload();
6 P. r' E; N7 R - ctx.setDebugInfo("rt" ,Date.now() - ti);3 |, ]) p. B, F& ?8 ~4 |2 f; _ R
- ctx.setDebugInfo("k", k);
' C5 x" o" @; V o - ctx.setDebugInfo("sm", kk);; A0 X4 p* j$ F; n
- rt = Date.now() - ti;
9 g4 V, ]1 `- }5 X/ v4 b - Thread.sleep(ck(rt - 1000 / fps));
! T. J1 x6 l) o; E$ x+ ~4 k5 @ - ctx.setDebugInfo("error", 0); V2 h$ E; r* ?: j' k4 s
- } catch (e) {
/ a( N9 i- B7 L3 J, v - ctx.setDebugInfo("error", e);7 K8 I+ T2 L5 G& U
- }
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- print("Thread end:" + id);: C3 a! }# z. w5 r7 G" W# P
- }/ N; U4 K4 @2 G! u3 r# x5 X0 |
- let th = new Thread(run, "qiehuan");1 f7 C" x( p! b O- t3 z# S' [) |
- th.start();
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[7 Z0 [- @5 G- function render(ctx, state, entity) {8 N" k8 P) ?6 S/ F( z
- state.f.tick();6 g" }& E3 k8 m- O
- }
' q+ e) f% I, T/ D+ S# T
2 x; I* b; u- B1 O8 R/ R0 d- function dispose(ctx, state, entity) {* p% P) V$ K. P' h' S
- print("Dispose");
8 V; T2 g0 N( R/ ?$ {/ {' B# T) i. Q - state.running = false;
# j/ I, @$ q2 l7 I4 }* d - state.f.close();! N0 k H. N9 G) ~0 ^
- }, U d% ^/ i" Y# |
- , l, O- i. V T6 I, v8 i
- function setComp(g, value) { K; K8 Y# _9 J* W( M# }
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: u* H0 ]& U- ] - }
复制代码
( W$ W0 ?& ?. `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。: a" C4 g9 k0 V0 ~" ]3 S
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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)' L1 `& r, X! J$ w5 a2 F
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