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( }# N: q/ k$ n, Y( N* [) i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。
) C% L# c% V9 j9 l- importPackage (java.lang);, ~, ~+ w2 [( b
- importPackage (java.awt);
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! q' ]4 g0 a7 I& N# Y B5 @ v8 ^7 V- include(Resources.id("mtrsteamloco:library/code/face.js")); d) y3 g: e; B B
- 1 [( m" u. c: s4 C7 C
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
' E' p) }: `# V4 G8 S$ T- H - let frc = Resources.getFontRenderContext();! `5 D" r! e+ R# \/ W+ D
- bounds = font.getStringBounds(str, frc);7 D" i. s8 e' g
- return Math.ceil(bounds.getWidth());4 R, a4 p; A( j4 n8 }* u% L
- }! n% {7 w3 P; Q
# q% E' ?' D# Y1 X- da = (g) => {//底图绘制
7 a3 u3 W$ E9 f5 V2 F) a! v - g.setColor(Color.BLACK);1 e. |/ c* u5 B8 r# Q
- g.fillRect(0, 0, 400, 400);
/ t3 U4 k0 g6 Y& k* Q - }
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. V. D' J+ E8 }7 H, y* ]$ X7 j- db = (g) => {//上层绘制
1 Y$ L5 q8 \, o B - g.setColor(Color.WHITE);/ K* ]) P* j) k
- g.fillRect(0, 0, 400, 400);9 L! o; Q- D" d: a6 O8 w
- g.setColor(Color.RED);/ a* o9 N. y% z/ h$ S; x' L
- g.setFont(font0);
7 e! G" A) j3 O! O; ] - let str = "晴纱是男娘";8 s* Q+ a0 Q4 F( X" Y5 |8 T3 I
- let ww = 400;" W4 E- F: U+ s0 P' f
- let w = getW(str, font0);$ n$ M" ]. E. L. b0 D; `( }
- g.drawString(str, ww / 2 - w / 2, 200);
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- / M% v) F4 a$ \) z5 f( Q; n# s
- const mat = new Matrices();
1 y5 G% ~" |, e" {) n - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {' L2 ` r* o1 S* X* G+ |
- let info = {7 F( p% [7 F* ^: g. V7 X' G
- ctx: ctx,* H$ n% u' S# I; @; }8 p
- isTrain: false,( Q6 ?' u9 W7 ]+ U5 v
- matrices: [mat],& q O. l- v5 V
- texture: [400, 400],
f% x9 U9 v* x9 B1 ?! d+ v$ e2 ~7 D - model: {
- t9 F5 Y! ?* o4 ?; L. B: @2 d - renderType: "light",
) P y% A3 H* q" B' S - size: [1, 1],
+ |$ @7 v7 C4 a; o - uvSize: [1, 1]# h; s: i# `. X& O) {, _) n2 W( s
- }; K- @7 F8 v. V- [7 w8 U5 M
- }
. \: p# U$ O4 L, E/ k - let f = new Face(info);% r3 W) @7 {$ |, M& s# S" M! j, V' G, k
- state.f = f;
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* V* P' M5 o1 K" K! x( w5 I9 C9 H7 U- let t = f.texture;' w( \5 E1 A: T# i
- let g = t.graphics;
! {" N _' Y( C4 d - state.running = true;4 _( [2 n) k1 A1 Z" B
- let fps = 24;/ Q$ M0 v, W( o$ n. W) C( i* }6 j
- da(g);//绘制底图
" i w$ }! T) H' _$ b - t.upload();
/ i; N8 K$ i% w p3 U - let k = 0;
+ c! [2 v. H- H" e4 U& e0 s - let ti = Date.now();% v% y2 D. t* p/ j5 E8 j
- let rt = 0;
$ l- T2 B" L% B - smooth = (k, v) => {// 平滑变化, A4 I/ r' E& M
- if (v > k) return k;' i% r+ D2 U& s0 N6 A
- if (k < 0) return 0;2 X6 b6 P# ?3 w' F0 i
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- [2 r+ l8 R/ W9 K& V+ L) u! @
- }* X, Y* a" Z5 r" @) G! C4 t( }7 C
- run = () => {// 新线程
5 ?6 G( o$ @: K9 x$ M3 z2 n - let id = Thread.currentThread().getId();2 K0 f/ Z+ }" `$ T0 R% F$ K
- print("Thread start:" + id);0 _+ ?2 ?0 g- ]+ K
- while (state.running) {8 O$ h; I3 h7 ~
- try {2 R. O; d1 ^- ~9 h( j, @' D* `- \
- k += (Date.now() - ti) / 1000 * 0.2;4 l( m8 v7 o$ G$ `( [6 ]
- ti = Date.now();" K( e% Q/ P5 q- [6 j: i2 a. f* Y
- if (k > 1.5) {4 L: U. u: c5 k
- k = 0;0 T5 h; i4 H; q
- }
" W4 |5 R& h( v/ W - setComp(g, 1);
$ f) W, s P, \9 y& W# k$ z& j - da(g);
" X+ q- Z( l6 {% a- ~" E- D5 I - let kk = smooth(1, k);//平滑切换透明度
8 v, Z3 b0 p5 V* `4 Q' Q - setComp(g, kk);
! } s# q, t u6 p - db(g);& M" \' i9 v$ i" X2 x
- t.upload();) m+ O3 [) ? v/ |9 n, e) {4 f* v
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 |' W, s: ~- L2 m: V
- ctx.setDebugInfo("k", k);1 {( H3 x3 E+ d0 f
- ctx.setDebugInfo("sm", kk);& e, Q* n2 w5 d
- rt = Date.now() - ti;% e% {0 n0 m& W: R2 |% G+ q" y
- Thread.sleep(ck(rt - 1000 / fps));8 ^$ H& g7 c* ?6 U9 @- g
- ctx.setDebugInfo("error", 0)
0 d0 y. i" l0 V4 v; V- C* V - } catch (e) {
. n' T+ q# w7 S9 Q6 t - ctx.setDebugInfo("error", e);( W6 W, p1 R9 G$ ], k' ~
- }7 s+ f9 r1 A" o
- }
, P7 s, w, z) R0 h7 ~& J* ^& M - print("Thread end:" + id);: d3 E# h+ D. Q; a* k, W1 u4 m
- }
+ W6 V9 I1 x6 s0 Z/ W0 O& w - let th = new Thread(run, "qiehuan");
+ M& x; X- x6 v/ t: P - th.start();
: J1 |" S" O) M! c5 L - }
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- function render(ctx, state, entity) {- J4 ~2 L, n. _! g' H
- state.f.tick();6 W; K$ |* B- p' S, d# U
- }
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1 O+ U7 O4 B5 K9 |, z- function dispose(ctx, state, entity) {
! |9 f7 M; F! v7 d+ Z - print("Dispose");
, V V4 h- s9 z V2 x4 v - state.running = false;
8 V+ {0 p2 Q' ^* b; o* X9 j+ ~ - state.f.close();
4 X$ }" E* J0 _% ^ - }, L& V8 J1 q# }
5 A7 m' u* b7 q/ x) L- function setComp(g, value) {
9 [* b( n# M; g3 z, D& y& W) j - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 M2 W3 K! c- m" [ - }
复制代码 ' G* p J! Z" s! ?, l C2 j) f
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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