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+ t4 D/ J$ g, e% J1 g7 c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。
9 T! i/ A- _( V- importPackage (java.lang);
' R$ ~- P; R4 v5 N0 Y - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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* w, f' d9 x+ R! e% O- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) t' I; \! ?" P l/ P
, w z6 o- O9 H. D1 x- function getW(str, font) {6 w- q f% @5 C/ M- ^7 f i4 ^
- let frc = Resources.getFontRenderContext(); P4 ^! J8 n, f# Z3 l+ u
- bounds = font.getStringBounds(str, frc);
2 S; [9 i. U: x1 H b - return Math.ceil(bounds.getWidth());( d9 Q& ]6 A6 T
- }' X& b% M' I2 i' Z* s+ |, P
, D2 Q' P) ^, ^# D- da = (g) => {//底图绘制
: x" b* ~6 A. @- r - g.setColor(Color.BLACK);
2 d- S; r1 }% ? i# ]2 x) }& q - g.fillRect(0, 0, 400, 400);" B3 A7 u+ p/ v4 I C5 h b5 o
- }' i+ i. |5 F! ?% ~) `8 e
! X+ E e9 P% W! k7 A$ o- db = (g) => {//上层绘制 W( M4 V, i) o( q0 ~, V
- g.setColor(Color.WHITE);
9 n, L; [1 F) ^3 S& b& k% W - g.fillRect(0, 0, 400, 400);
2 z- \; k, t, o# O; N# N - g.setColor(Color.RED);; i4 b& ?, @ c7 I. U
- g.setFont(font0);5 f9 X! x6 u+ m$ l! F
- let str = "晴纱是男娘";
# }4 a2 {& Z& Q# T' B" Q! H/ ?1 j - let ww = 400;
: K4 p4 }+ Z, n3 a6 e - let w = getW(str, font0); N2 u0 |7 ^! U
- g.drawString(str, ww / 2 - w / 2, 200);
: f3 K+ ^. L: O( L; |# j - }1 ?! u3 [/ Y! h9 s2 K1 M. ~
- * H. h' }) Z/ X9 g) {
- const mat = new Matrices();
" ^0 }# X) R; U, S) S3 J5 ]$ D* A - mat.translate(0, 0.5, 0);- S8 x V! r; f" s [6 g! i4 K
- ' m$ t! O3 Z% c; X9 A1 ?
- function create(ctx, state, entity) {
6 S( L" d+ ^% R& r" W8 [7 n' m - let info = {8 A% O4 `% |; ~# s; ?( H( ^" Y! p
- ctx: ctx,
: o+ V' e1 l1 b. O7 _$ n; q - isTrain: false,. {! K: g3 a0 f4 }, X) E: Z: K- l1 d
- matrices: [mat],7 D4 s$ |0 e% B) h; I
- texture: [400, 400],; Y3 u' W) J" _0 T: x4 W& O
- model: {
; C w+ I. B- V7 D; j% ~ - renderType: "light",
+ M7 [( `1 J! \/ |) T1 y; J - size: [1, 1],, v. r9 z" c& U8 F2 l( l% X
- uvSize: [1, 1]
- Y8 f6 a; a' g& ?( z5 } - }# I% ^1 q' [" o
- }
5 v D1 |% J/ J# ]5 G0 K! k - let f = new Face(info);9 K* a9 |/ y+ j6 x
- state.f = f;
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$ S9 \0 k( R5 f! a d0 g7 O- let t = f.texture;
% A' \% F3 W2 ]0 b: D - let g = t.graphics;. @8 D, O! d5 v& L( ]6 o- w( T
- state.running = true;; Z1 E. s" I0 x: Z. \* m Z* d
- let fps = 24;7 z5 u7 h4 o5 Z a
- da(g);//绘制底图
7 V4 y2 y# J0 Q% ?$ B* b - t.upload();
F9 D5 F; a a5 q a1 o - let k = 0;& s& L7 z& \- r/ h2 ?8 f: G
- let ti = Date.now();; F7 C2 q% ?9 s) {) r) D
- let rt = 0;, f$ R& D# O& s4 z; G# W% Q
- smooth = (k, v) => {// 平滑变化
/ i0 w+ Y% U' d9 I$ _/ H- S% t8 q, @ - if (v > k) return k;
4 p7 }6 h3 a4 l. T( B8 s - if (k < 0) return 0;
6 n# {3 T0 n- c: j" A, S0 `3 u! r9 Z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" P1 G' G5 t: D7 Z! s' X# H4 d. L - }
! r) O. ?. q) f: X5 |* H - run = () => {// 新线程
0 p1 [$ x) B" q. O - let id = Thread.currentThread().getId();- f( o# b6 A# ]/ T: o4 g
- print("Thread start:" + id);
$ I4 D/ h2 @+ l9 G - while (state.running) {/ S% l; }8 g9 m9 d0 J
- try {! R& i O! i. ^, I1 l: M# z2 O
- k += (Date.now() - ti) / 1000 * 0.2;
) v$ h8 S* M8 l5 x - ti = Date.now();
$ F( c' F9 e: s6 ~# G - if (k > 1.5) { Y7 V/ G: n( W1 q- _
- k = 0;
6 W( U0 [. w, e( d3 e, N - }! m8 Y- i6 B$ t) `
- setComp(g, 1);" N: |2 g4 v8 V3 C( V9 [
- da(g);
- [* ~6 ]2 E' _ - let kk = smooth(1, k);//平滑切换透明度
1 a1 K3 u/ X/ |5 n9 L( x( J( k* u' f - setComp(g, kk);
& M7 l6 Y1 J3 Q4 c1 R - db(g);* e! P, ^0 }/ r: A" G) C
- t.upload();; F( |% P o/ z! v& z* Y. l
- ctx.setDebugInfo("rt" ,Date.now() - ti);
# \* Z5 r' j: r - ctx.setDebugInfo("k", k);
7 _; Y8 |! k7 v& h; X - ctx.setDebugInfo("sm", kk);
# e* K. a* @; d% `2 M - rt = Date.now() - ti;5 B4 b3 Q) E7 D9 c2 E# Q
- Thread.sleep(ck(rt - 1000 / fps));* `# |! t. [8 X6 m: }7 [' i
- ctx.setDebugInfo("error", 0)- E. H1 M8 s7 ]- i; n/ e3 r& Z
- } catch (e) {
) y W" i$ Y& [% |; a" q - ctx.setDebugInfo("error", e);2 _7 O2 ]4 [# b/ R
- }4 \. V, {/ \) N" R+ @. d8 Z
- }
' Z+ S: y, K& Q* ?! w8 N6 a - print("Thread end:" + id);
" R0 S4 q% Q# q2 U! a - }
2 X( |( Y) X* P - let th = new Thread(run, "qiehuan");1 d7 l7 U g* O- @* z' c2 z4 ]
- th.start();% Q' ~5 l8 T) v+ g
- }2 M$ h1 f( ]6 @* l; J
- ; b' d2 [$ ]) ~6 [+ i, a
- function render(ctx, state, entity) {
1 O* O2 j, q- d- M2 I% d y - state.f.tick();
1 ?' H; o4 a! r: Q, }& C - }
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) w L8 N0 \9 ?( u# w- function dispose(ctx, state, entity) {
' |1 A a+ B: c/ b v - print("Dispose");6 \4 z5 r5 O: c) N- ^4 _
- state.running = false;
( \0 W7 A0 f6 J- v$ A! w1 v- R - state.f.close();6 D7 E/ L6 L' P8 r% c
- }
4 D1 y T- {" g" H- M5 u% x
0 H2 B! [* q l1 F- function setComp(g, value) {
" }" d8 e, v1 }. ^. g! R - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 c( g9 }" z+ ?5 D& T, f - }
复制代码
, s; @! K! O0 t, l- h7 H; s9 i9 t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。( W: Y1 H& g/ T/ h
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7 R5 X5 E+ Y- b' O: @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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