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, V3 Q% F! d& z. k5 p# _: ?2 H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。# R: u9 F5 h: U# C l/ a# f2 `/ H5 S
- importPackage (java.lang);) @6 v* R: s) B
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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2 T0 e* Z. L+ i- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( t8 b& F, X4 I- function getW(str, font) {
8 w @- C. T; c/ g+ ?5 X, t0 \ - let frc = Resources.getFontRenderContext();
5 X3 T* e6 b- F9 q. @ - bounds = font.getStringBounds(str, frc);
1 y9 u6 \0 S# s1 b- y5 f* h - return Math.ceil(bounds.getWidth());
8 A/ `0 V0 s7 q) c - }: u2 H C7 g4 l* ] r) s
- 1 a& e8 C& l, s8 D2 K$ c
- da = (g) => {//底图绘制0 z. d' a+ X) q% y
- g.setColor(Color.BLACK);
, {' p) Y+ z9 E1 p% Q9 r" V - g.fillRect(0, 0, 400, 400);! Y& z) L* s G; B% v( r
- }& ], z5 J! p6 Z4 |- m( G# V% c
3 v" l6 v3 j+ Z+ b+ a" `; f" l# a- db = (g) => {//上层绘制. V2 R2 W, E; c' [! o2 z, a
- g.setColor(Color.WHITE); L9 C% K; a5 m+ W
- g.fillRect(0, 0, 400, 400);' x* J2 w9 a0 J# K( E) r7 p
- g.setColor(Color.RED);3 d2 d: j$ x" w+ x3 @
- g.setFont(font0);
$ H2 |4 J8 n- q+ y" V - let str = "晴纱是男娘";& x3 b- S8 G2 i
- let ww = 400;3 k* |7 ^4 y" O% h9 l. U) n
- let w = getW(str, font0);
0 \* |" q" u( J$ k - g.drawString(str, ww / 2 - w / 2, 200);
6 a5 g1 U& \ E0 r - }
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; d* n, [0 c2 E% I7 f; z; N9 P' [- const mat = new Matrices();2 x( F4 C; P. r3 t$ R; _3 W+ {
- mat.translate(0, 0.5, 0);
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6 _. e% d) \1 _+ V- function create(ctx, state, entity) {9 i) P# q. f0 z
- let info = {
6 }( O( d* `/ u& j - ctx: ctx,( v1 k* j* e* F* V6 V% ^
- isTrain: false,
' {& j0 Q6 |! k1 G; K - matrices: [mat],
$ u1 l% T. i- I& e w - texture: [400, 400], }) H( ?. |9 E
- model: {
9 g0 W" S* t, o" a9 ^ - renderType: "light",
; E! {7 `- r2 a( Z+ G& v - size: [1, 1],
/ A4 d/ u9 `; |; [& c9 b - uvSize: [1, 1]# T6 E0 ~! U0 O e- f6 J
- }9 P q9 h5 H5 o- Z& I# _
- }
9 e6 h" T; i1 L9 D1 ?: x2 s - let f = new Face(info);
7 Y# q0 u1 n- s% q. L! j: T, ^3 E) t' ? - state.f = f;5 t- h% b( h+ d. n) d
) |) E- A4 f: ]) |$ L$ B' K0 G1 G4 i+ R- let t = f.texture;
! u. z( r) L5 W. {; H" W8 d - let g = t.graphics;
+ u% h) C# J1 K) I - state.running = true;
# M1 c* x$ \% C% ^' ?9 o' t - let fps = 24;# X* h4 K2 n6 G
- da(g);//绘制底图8 z$ B7 u. `$ K1 J, |# }
- t.upload(); d$ ?: A3 Y' T* V& d/ G w$ D( k+ d
- let k = 0;/ d- W9 I: Y: v2 ]
- let ti = Date.now();
. @1 v( ^, I U4 E8 K - let rt = 0;
, Q* t" T9 w, {: n" T, a* C - smooth = (k, v) => {// 平滑变化( _% e) \* u0 w9 k) I4 ]4 O( E7 x* ^
- if (v > k) return k;: ^ l" @) O _. Z F/ c- G7 @
- if (k < 0) return 0;
( Y. S1 H4 y: [0 v' C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" I4 O- w+ F. `0 K1 k, W9 a( M - }4 N# V* v2 x* Y/ U3 y
- run = () => {// 新线程
' x6 S9 u4 r. }3 o6 P4 E+ Q1 M - let id = Thread.currentThread().getId();8 B6 ]5 Z' ~0 p
- print("Thread start:" + id);3 _0 A9 N; k, v( y( I
- while (state.running) {
+ t# {4 T$ H* d6 H5 y. V - try {! t! _( O; l+ ?6 v" B
- k += (Date.now() - ti) / 1000 * 0.2;2 n& j6 @: F5 j3 M. }. E) e* ?
- ti = Date.now();8 k$ ^- g, a. {3 _: _' h
- if (k > 1.5) {8 C+ \! |0 i* I) m' Z, h
- k = 0;
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- setComp(g, 1);: \( A2 p" F( A2 y4 Z/ n9 t4 U
- da(g);4 Q; T# L4 l* Q& _% x
- let kk = smooth(1, k);//平滑切换透明度; i. M8 Z; N8 C/ o* x
- setComp(g, kk);
- O" g9 }8 W& k- c - db(g);
0 R" ~' V. g: M - t.upload();9 N4 h2 q- C0 P( b/ z) m, Q
- ctx.setDebugInfo("rt" ,Date.now() - ti);7 ?6 c; p! Y, U2 {, c: V# O
- ctx.setDebugInfo("k", k);* e; d9 U! a4 W- t
- ctx.setDebugInfo("sm", kk);& E) ]7 Y7 O3 M3 t; k/ X3 v
- rt = Date.now() - ti;
' z! A, O* d. g - Thread.sleep(ck(rt - 1000 / fps));
: B: O) V3 Z3 s. ]) q' ? - ctx.setDebugInfo("error", 0)
* K' I) B0 j! E5 y" G0 ]0 N - } catch (e) {$ i: h ~& F2 P e t2 |
- ctx.setDebugInfo("error", e);
. H( g$ W/ x3 v8 O% \ - }
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- print("Thread end:" + id);
9 y0 [/ G+ n/ e, o4 U) O - }
; K4 B3 g, S+ ?- M7 N3 w& V - let th = new Thread(run, "qiehuan");1 M Q, [( S0 w: P I" c1 O
- th.start();
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- - S5 ?& Y* Q2 C: I: Y+ e
- function render(ctx, state, entity) {& ~3 h/ g* A8 \% b
- state.f.tick();
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- / z$ s: c: {$ y
- function dispose(ctx, state, entity) {1 c# ?1 \3 e7 `: G* _
- print("Dispose"); p5 ^- l$ V1 u/ L% N: Q
- state.running = false;' B- B+ d8 J7 r# m
- state.f.close();
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/ Q4 f0 _: Z' m( N$ l7 d- function setComp(g, value) {
9 c4 E0 q6 J: f4 o - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 Q5 d! u7 o* o& v" w& S% I - }
复制代码
* S- h' T3 y8 b/ y& f" ~; 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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. q- D: t/ y; c5 U0 ]4 O/ |/ L B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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