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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。
9 w3 U }/ `8 b7 P) {- importPackage (java.lang);$ E# l6 R' |* x! w" ]- N
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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! }5 j5 l% E" l r' s0 e- function getW(str, font) {; D9 S' [+ a/ Y" K; O, r* [+ o
- let frc = Resources.getFontRenderContext();
& [3 @6 C8 d. V2 ]' u+ E4 e* c! C - bounds = font.getStringBounds(str, frc);% j ]+ u. p% ?. G
- return Math.ceil(bounds.getWidth());
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- ! K( i1 J8 j$ d" x$ V
- da = (g) => {//底图绘制: ~) M, I' ~% U* y7 g4 Y: v2 W9 u
- g.setColor(Color.BLACK);
; \- Y0 t9 y6 _, Y( m" p - g.fillRect(0, 0, 400, 400);4 h! K& u3 k' U% `! [! S/ c
- }1 Z$ B; ~1 q6 R! D5 c2 n( g
- 1 D- @( y+ r2 ]7 ?
- db = (g) => {//上层绘制4 o3 i7 F3 N: F7 L8 W1 g* b5 D
- g.setColor(Color.WHITE);
3 {8 r+ Q5 L& X0 F* X - g.fillRect(0, 0, 400, 400);
% q! B& ^* E5 H7 r3 `: E - g.setColor(Color.RED);4 N8 D9 e8 ?5 T" R& {- v: [5 [
- g.setFont(font0);
5 q. W, E) L3 j2 N7 R o - let str = "晴纱是男娘";
1 U) V' F' A w5 N* c+ ] e, P - let ww = 400;
: s7 E4 s2 }/ j0 i - let w = getW(str, font0);3 y! @/ }! @+ a
- g.drawString(str, ww / 2 - w / 2, 200);+ ~, r9 x. a1 y% a5 v# z9 y
- }, G/ {# C* @ E
3 C% p9 W7 x1 b" _6 E7 b+ h- const mat = new Matrices();
- a. s7 w# n! r5 H - mat.translate(0, 0.5, 0);+ y6 P/ ~0 \/ |% _# }. ?
( X0 O* D% T5 X* x# [4 [- function create(ctx, state, entity) {! r6 S. L7 O( Z" b# m. o) c, u- e
- let info = {
! M: s7 @7 k1 n7 b$ b - ctx: ctx, C8 `6 b0 z/ _8 \/ y U
- isTrain: false,
/ ?8 ^3 R' ~/ i6 V: L T" R. L - matrices: [mat],& V6 [: ~# z6 @
- texture: [400, 400],. [! }( O+ p% U, e9 K5 G' g, |, ^
- model: {# x. \% l6 ?( T- @
- renderType: "light",
3 U8 c0 x6 N, S' g - size: [1, 1],- L. I0 a" E& _. F( \# p
- uvSize: [1, 1]% z7 t& x! m ]9 S3 ]) n7 V
- }
- G4 W" p$ w' D5 ^+ g& [ - }
" n- Q6 g3 v$ K. F - let f = new Face(info);& H4 `; q. V) s0 i6 ]- S
- state.f = f;
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1 s$ s; M. i) ~0 O- H7 j( b; I7 Q- let t = f.texture;1 ~9 E& E- C7 W0 q+ G
- let g = t.graphics;) }4 V0 A+ [& i! v: @
- state.running = true;6 i0 s8 h; ]" W# y+ ^$ ^4 x- R
- let fps = 24;
9 `) f) X( Y' K - da(g);//绘制底图% a. @0 [ W9 [2 j; B/ n+ x
- t.upload();
6 g* e" {8 q* B# V% ? - let k = 0;- x9 V* K8 Y0 a) B
- let ti = Date.now();& S7 _# f+ I4 l4 I0 q `
- let rt = 0; r; i0 `+ U% l; u9 l% j
- smooth = (k, v) => {// 平滑变化, v3 B: z; ^% D0 L1 N3 k' C
- if (v > k) return k;
: Q' }- `; o6 b: q* v - if (k < 0) return 0;
1 ]6 K: N8 W3 b2 i% [, c8 C& c - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ l% ]" U. Z+ U% `+ i1 b6 q
- }! v+ l) w4 t, H# _
- run = () => {// 新线程6 s' t( L; J0 {# R
- let id = Thread.currentThread().getId();/ @" Y' B/ m! F+ g% u4 A
- print("Thread start:" + id);* s, n' u+ X! o, l
- while (state.running) {
, M8 X. W Z2 ?; M% j9 [( X2 O - try {6 X; J' G( ]" p; e: h7 F
- k += (Date.now() - ti) / 1000 * 0.2;
, ?: {: o; L, s - ti = Date.now();3 ^& o4 t, z0 W& N B6 |9 [5 F
- if (k > 1.5) {3 s& D2 e* T! q) Y- j
- k = 0;8 t! }: P% F7 d6 u4 J
- }
4 z: p* u- D2 ?' D: T& n; d - setComp(g, 1);- F1 x# Y0 X+ N6 i
- da(g);
# a+ z2 _3 \& A3 E* A) x) ~9 W- v - let kk = smooth(1, k);//平滑切换透明度
* \* ~5 K' e( ^3 `0 D - setComp(g, kk);
1 Y' j& p+ F7 {/ w) e - db(g);
+ l* ^* ^, K: s6 S - t.upload();# T( C5 {. |2 H) S- |/ I
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 C9 D0 ~7 K4 |) b - ctx.setDebugInfo("k", k);
0 N4 }3 Z! I$ n5 `1 d1 V$ O - ctx.setDebugInfo("sm", kk);- E1 E5 b/ R% l1 V9 q" s! A
- rt = Date.now() - ti;
, g! u& ^3 G( \6 ?; G( o - Thread.sleep(ck(rt - 1000 / fps));
- B4 ?/ ]" S* t& `' S - ctx.setDebugInfo("error", 0)
8 N0 S. T! y& v7 Q1 S; W - } catch (e) {
# j8 \9 F7 Z$ F/ [ - ctx.setDebugInfo("error", e);
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- print("Thread end:" + id);5 C" j% V4 J- O$ c& h' H" j# w
- }4 u/ V0 t/ z8 t' X5 m6 h! s
- let th = new Thread(run, "qiehuan");( r) k. }' q8 C4 x
- th.start();+ l* q+ d0 q+ F& S) D
- }
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3 u# g v5 k& e4 d3 F- function render(ctx, state, entity) {
, G; y% ]& M& h& Z) h - state.f.tick();
) ~& U9 l' x8 G% ~1 l/ d - }7 x0 c: _, ^' p! X. X/ ]
- ! Z$ g0 O9 f/ \) n# Z
- function dispose(ctx, state, entity) {
k6 \2 j4 l) W; ]# g# L- p - print("Dispose");
" e% R6 x( w5 O - state.running = false;
2 l4 T; Z6 o0 |' Z( {0 \1 q" R- H/ P - state.f.close();
, w: }) |& I' n( j7 ^1 b% P - }
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: \% P9 f1 d1 d+ `- function setComp(g, value) {' E9 e* U) Q+ a( ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));- ?8 B6 v C) g7 H; v: j; o
- }
复制代码 6 Y, X9 j! @4 [& n# 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。$ ^- f1 H) \7 u) q1 `
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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)5 l: Y( P. U; E" y
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