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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。) B5 P8 u6 @4 E; b& B
- importPackage (java.lang);
# K3 Z" @3 ]) P+ u: z- n S" ~ - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! F$ Y* R# k% Z) a3 m& B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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) Q6 j J2 x2 N/ I- function getW(str, font) { Q4 O8 x: |; A% p8 V" F
- let frc = Resources.getFontRenderContext();
# _. t; I- m( W4 f9 L- I - bounds = font.getStringBounds(str, frc);
, N( S U/ y0 x - return Math.ceil(bounds.getWidth());
$ k$ y5 ?3 s; n7 k - }
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2 M/ [% g% y4 }: ^ i- da = (g) => {//底图绘制1 ~) u0 ?0 l) B8 L0 d# N1 E
- g.setColor(Color.BLACK);" F. ]. C. Y& t: z* }4 M
- g.fillRect(0, 0, 400, 400);
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' A' J& H: d$ r( W9 F( X' B7 E- db = (g) => {//上层绘制
6 @$ M- o5 _; i! K - g.setColor(Color.WHITE);$ `$ y& a k9 U' K! M7 U
- g.fillRect(0, 0, 400, 400);
4 P+ _1 X( j) w$ J4 {; f - g.setColor(Color.RED);! }& P d. U, S1 ^/ `- L. h: w3 `& N5 v2 ^
- g.setFont(font0);4 `6 M5 J0 |" _
- let str = "晴纱是男娘";
- E6 A- G ~$ ~6 R. R* N8 s - let ww = 400;
/ b4 H+ A3 i* H! [( e& B - let w = getW(str, font0);
6 V/ ~8 l$ O/ s- [1 S" R. f - g.drawString(str, ww / 2 - w / 2, 200);2 [7 q% R+ E) E) S
- }/ E$ p% n+ k( B! R5 Q& w
- 8 S8 q( b* Z; r2 L! I& M
- const mat = new Matrices();4 I$ P: k7 k/ Y: G1 g
- mat.translate(0, 0.5, 0);4 l% m) d4 i) Z( T. Z
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- function create(ctx, state, entity) {
6 z2 c* ^ `# p) ^4 H9 E0 q+ D - let info = {
+ N! k! ~0 B. p- p h - ctx: ctx,5 \1 l; A2 |5 S8 [9 v
- isTrain: false,( z6 k8 k: p C8 ~ K$ h
- matrices: [mat],: p2 z k+ k3 l. d
- texture: [400, 400],5 _% h+ Y' j* ~/ q, v/ `% ]
- model: {
+ O$ K+ F2 a8 P- |6 c* d6 y - renderType: "light",
& { m ?5 _8 t/ _. V* L3 g& }9 d, M - size: [1, 1],
$ K9 O) ~& V% E8 p1 Z0 h1 Q - uvSize: [1, 1]
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- }7 o& B* ~ j! p2 w& }- C; w
- let f = new Face(info);& ~: q w9 Q) c7 Y
- state.f = f;* v& i8 M, _2 {. V# g
- 4 J" P2 U& A$ M; ]/ G4 Y; s! Y/ t. P" o
- let t = f.texture;
. f; ~, U# l% O5 F2 Z0 _4 } - let g = t.graphics;2 O. _3 t, I6 m8 H/ h" A% u
- state.running = true;
7 m1 n( a( ^; y7 e% M - let fps = 24;
1 ]! W$ m$ M$ O4 p- }5 ~% k# Z - da(g);//绘制底图
" p5 x" q- p$ T8 T, ^ C - t.upload();0 C' m0 }+ H. P7 Z9 b7 }
- let k = 0;
9 k& R, b: @$ _6 P7 u, d: T - let ti = Date.now();1 k! R3 \$ W# b+ Q
- let rt = 0;) I# T- n \1 ], Y5 h$ ]
- smooth = (k, v) => {// 平滑变化
7 i3 h( h `/ i9 O - if (v > k) return k;1 x. D/ G0 o! v6 c
- if (k < 0) return 0;
6 _' x3 ~8 P, I A( l5 ^, E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程/ n% q( B1 p& |/ `) r! G7 }& Z4 c
- let id = Thread.currentThread().getId();
4 x/ [+ i: L3 G - print("Thread start:" + id);0 g* G9 M( }" V0 C
- while (state.running) {1 q% [1 I) U9 o# C
- try {3 p7 t( T5 D" z) K$ ?( W
- k += (Date.now() - ti) / 1000 * 0.2;6 m# J% \6 ~, O2 k! B. w& |
- ti = Date.now();, x+ M& o- _8 p- R. n8 ~
- if (k > 1.5) {* C. B6 L- k1 Z$ q b2 W0 C+ b
- k = 0;
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- setComp(g, 1);+ q8 Y& [4 v7 h1 U% S/ b. J
- da(g);
- x9 K: v. h5 K% f- W) O - let kk = smooth(1, k);//平滑切换透明度' g9 R1 t. B7 q3 U
- setComp(g, kk);6 K7 X5 Y$ Z3 c- V7 n* M
- db(g);
; l7 p, q4 J: T9 U# |, \ - t.upload();
F+ x" u3 d- {: ]4 M% Y - ctx.setDebugInfo("rt" ,Date.now() - ti);" j, h2 |2 Z% Q( T# {
- ctx.setDebugInfo("k", k);4 k' E/ F8 W$ A% U+ @* q
- ctx.setDebugInfo("sm", kk);3 Y( d5 ~7 p) `( V
- rt = Date.now() - ti;
8 g1 ^! ]3 ~1 G4 y! ~ - Thread.sleep(ck(rt - 1000 / fps));
/ ?1 A" |: U, f/ A/ t - ctx.setDebugInfo("error", 0)
" L6 `4 X, Q) b" l0 M5 B" M - } catch (e) {
: u- X1 O% h% T8 U, v; T( L$ y - ctx.setDebugInfo("error", e);
" c" } `$ U5 p# ^6 \ - }
4 |1 |" F; u) U( x: Q' w! F# Q. S) E. x - }
1 ]5 q% T u; w. G( } - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
; q/ O6 v3 x2 M, f [! k0 u2 } - th.start();6 i7 u6 j* g X, Z/ T8 h
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- 1 {/ B1 t% w# a* M
- function render(ctx, state, entity) {$ z8 d3 V' k" j' j# f- d
- state.f.tick();& d1 q8 D/ p$ x
- }2 ]. G9 N5 D/ p$ @
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- function dispose(ctx, state, entity) {
: \- [! y. m( {) a6 _" i - print("Dispose");
/ U. R3 R5 i8 u8 Y. { - state.running = false;
& s0 }0 I9 a) H2 T - state.f.close();& z) u& B" r$ G \9 F$ \- B
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- [4 U" Q6 ?* ]9 S* d( O$ E$ z- function setComp(g, value) {
& p2 D9 _ \; t& O |4 H - g.setComposite(AlphaComposite.SrcOver.derive(value));: C! ^, ^' |( \$ {. I1 H
- }
复制代码 6 s# n& B7 y; l! h, b
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。+ {" [) m2 M+ s8 E% W* e- f
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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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