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2 J* e! Z2 _; X" w* r6 Y. p! Q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 y* Z% s* t$ U; c+ C: c/ [2 S Y
- importPackage (java.lang);$ i, p0 S- [( y
- importPackage (java.awt);
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' S: X/ g5 c( f( |" q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. P1 m" h: L" _3 e6 b) n9 l8 c' Y
- # }0 `$ v4 X( S/ P
- function getW(str, font) {# E* U n9 m6 j6 T* ]$ u. F$ C
- let frc = Resources.getFontRenderContext();
' N' s4 l# I# J% f0 T - bounds = font.getStringBounds(str, frc);
7 [, } l1 j6 A l - return Math.ceil(bounds.getWidth());
* `( s5 @ C7 H, ` - }# E! N* ]8 D- A+ i! J7 u& s
- / m( j4 C- ^% ]* @/ G% @
- da = (g) => {//底图绘制
- k9 c' {1 m t4 F+ i! H - g.setColor(Color.BLACK);! c7 K5 S; ^ G: I+ J- C' X
- g.fillRect(0, 0, 400, 400);
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; T. _7 L0 D, j! K0 S" b- db = (g) => {//上层绘制 m* o9 w x, A2 T5 V# V" p
- g.setColor(Color.WHITE);
' t: K0 T5 Z, n- @$ u - g.fillRect(0, 0, 400, 400);
2 \1 r3 ?/ Z, }: E - g.setColor(Color.RED);& D0 C( m" h u) M7 f" y) e
- g.setFont(font0);
! `/ h0 ]& }( H8 D+ Z - let str = "晴纱是男娘";, H- Y. Z) @# G j: Z- ~
- let ww = 400;1 ?. L( f9 m5 A# q
- let w = getW(str, font0);2 b' o- Q+ y/ P
- g.drawString(str, ww / 2 - w / 2, 200);5 b8 j' t2 Z, K2 I+ a/ p. O2 Y
- }
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- const mat = new Matrices();
( \5 u" m8 o& g, @. C2 G - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) { A0 P% K: t0 L, ]
- let info = {& f6 C2 s8 I# x5 S, M ]
- ctx: ctx,
* J2 V+ m6 ?4 d - isTrain: false,
0 K& d; v5 B% M$ H1 }. d - matrices: [mat],
. E! O# [4 u' G, S& w1 V/ _ - texture: [400, 400],
# E1 a! \; L% c- W) ~& e - model: {* n; ?% s0 b. V
- renderType: "light",
8 W$ ~1 d! ]$ p$ X# j - size: [1, 1],3 [6 Z n2 j% E* w$ {
- uvSize: [1, 1]
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- let f = new Face(info);5 i: W& y6 n! g, U$ r7 f& W7 K
- state.f = f;
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- let t = f.texture;$ W5 a6 f4 Q2 Q& u* `
- let g = t.graphics;
+ D+ I& b: O v, a, D3 S2 E' M - state.running = true;/ }- w6 n+ V* e( y! B
- let fps = 24;+ E' M: ]! j/ N% D* u- Z! \0 h( G2 B, j
- da(g);//绘制底图! D, r( v7 a0 `) [5 q
- t.upload();
( j( M: ]- H( a3 [7 y4 Q7 u - let k = 0;
! ]* U. T5 W9 e5 G" ? - let ti = Date.now();
4 M/ b; v7 i7 U- G* U - let rt = 0;* }* A6 H. E4 A
- smooth = (k, v) => {// 平滑变化
+ ]) D7 d0 \6 Z4 k - if (v > k) return k;7 i3 l7 A4 a o4 q# b5 W$ x
- if (k < 0) return 0;
( t- _; t* ~8 ~+ T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; i4 Z3 V4 O/ i$ a
- }9 s" m2 T' e. `" D: q
- run = () => {// 新线程
, b* V* C7 r& K5 h) [7 q1 C# J+ u0 ]/ e - let id = Thread.currentThread().getId();
- q! i& ^) y5 H- [: P; R - print("Thread start:" + id);, G7 f: m5 x* K, w# r
- while (state.running) {6 H/ ?0 e9 Q' C; o% k8 M
- try {+ r6 j# O# K/ q: l5 G( _- F w
- k += (Date.now() - ti) / 1000 * 0.2;
& b8 E! [/ Z7 I/ T% w/ Y' ?7 f/ _ - ti = Date.now();
4 F q3 ^! s5 U6 F' N$ J4 C - if (k > 1.5) {
% i7 ^: G" H# ?7 v' O - k = 0;
8 l, a* y" ~/ |) ^3 R1 Y$ o) F - }
( {+ a3 h; v% w* r$ J" I - setComp(g, 1);
* t2 g, F3 K. g. t% P$ r' a1 Z - da(g);& x- B W" C& u) F5 K
- let kk = smooth(1, k);//平滑切换透明度 o3 E2 S' E, H9 U4 o
- setComp(g, kk);
' O! r/ s4 \9 B5 S. g6 U- C - db(g);
( p/ r. U+ N8 P& K( F: [ - t.upload();; n# a$ n- H2 V% ^8 w) ~4 _
- ctx.setDebugInfo("rt" ,Date.now() - ti);
m- x/ l( q" ]! [2 {! B0 m8 `) P - ctx.setDebugInfo("k", k);" u9 p; E4 l" b7 R# C
- ctx.setDebugInfo("sm", kk);0 U& _# u0 |8 d n3 Y' l* ~% E
- rt = Date.now() - ti;& Y; O) t$ i' M9 \2 T" e \# j; x
- Thread.sleep(ck(rt - 1000 / fps));$ h+ \0 W& u9 p; x) a1 p
- ctx.setDebugInfo("error", 0)' ^2 u6 x% x6 Y( A' j2 ^5 q! r
- } catch (e) {2 a6 t- \) N# B( _4 J
- ctx.setDebugInfo("error", e);
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- }9 F# Y# d* e3 o9 C
- print("Thread end:" + id);* y0 o8 x2 \+ o+ _* I, [
- }
6 H6 N' Y* F8 y, I: ?6 G( } - let th = new Thread(run, "qiehuan");0 o4 N/ r' y6 u- b
- th.start();4 _+ C z# S7 l, e$ @/ E1 T. _
- }" |$ G) Z+ `+ ]
0 @9 g/ M; \6 a( V* ^- function render(ctx, state, entity) {
$ r( Q) h% t3 V: |, T( J# J - state.f.tick();' }- u* [# @5 q) O; c
- }# ]5 H4 Q/ Z7 S/ D, i- N9 F
: X. L; y: ~8 n2 K! i- R$ n9 D" I- function dispose(ctx, state, entity) {
6 Q2 a# ~1 c7 f; ], f) S - print("Dispose");
6 L) E: g- Z& j* d e3 X, N - state.running = false;
, A' L" t9 N$ z( }$ e$ J" V4 J$ o. D; k1 [ - state.f.close();; u: R' k% T8 r1 B f8 R
- }
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$ ]# s5 j. y+ W$ o4 `; k; @% e- function setComp(g, value) {
* f* j" G5 \6 `7 F2 J# k - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 [; q5 G" K: t- I( ^+ B6 P - }
复制代码 ) f- r' _2 }9 F1 z6 J& ` u# R
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)
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