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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。' a6 v9 N& ^$ L3 W) ]$ Q+ I
- importPackage (java.lang);* Y* ~6 n, c) l: u' @. z
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));( I4 {& t) [, F0 U' b7 ~, [
1 T y$ T1 K1 e+ S) M' u+ ]- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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7 @- h0 X$ N" F, @: Q" Y9 @- ^- function getW(str, font) {9 [4 {' E' }1 k* G7 ~
- let frc = Resources.getFontRenderContext();
4 K: G$ Q$ k% e& c - bounds = font.getStringBounds(str, frc);
+ \; q q5 b; ~" ]! L$ _6 w - return Math.ceil(bounds.getWidth());7 Y7 q* J+ c! ?) J
- }
- [6 Z# ~1 L9 J) g( p3 k - + ]- H- W1 w: ?: |9 j
- da = (g) => {//底图绘制
" Q5 _/ w1 v* f8 T' t8 H - g.setColor(Color.BLACK);6 l! e$ c6 a/ X3 b
- g.fillRect(0, 0, 400, 400);
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; a4 g) T$ \' [1 b, I! g3 s$ }2 i& x- db = (g) => {//上层绘制; U2 J9 I6 U/ C: L+ P, `
- g.setColor(Color.WHITE);
6 x: w4 A; u4 X7 C& q - g.fillRect(0, 0, 400, 400);
1 k$ [) R# v! K% H+ D - g.setColor(Color.RED);
: f7 l& m+ S9 Q7 a# j - g.setFont(font0);
9 y+ A" F5 s2 {7 g - let str = "晴纱是男娘";
- Y: S6 X* Y9 K- n' }, X - let ww = 400;
" m, |0 \5 ?5 g$ I, }9 n- }: y) N - let w = getW(str, font0);
7 T8 g+ u; W: U' {- u2 Q- W - g.drawString(str, ww / 2 - w / 2, 200);+ b5 ]) a. X- s( G$ C' L8 Q
- }
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4 B0 X2 z" f$ a% M6 ]- const mat = new Matrices();% ~0 X p& r# ~! z/ k2 u3 x
- mat.translate(0, 0.5, 0);1 q$ \4 o3 |9 a& {7 p& h `
4 |$ V8 \9 ~. [- function create(ctx, state, entity) {' F. l* H( n4 A5 B
- let info = {
( i4 n5 W/ m/ o - ctx: ctx,2 v& M6 Z! M, B9 _ l8 D
- isTrain: false,7 F% Q* h) q# A- i
- matrices: [mat],& b9 h; ~3 ~* Z% l2 X0 j
- texture: [400, 400],
* Z7 f' n1 i2 b0 H% Z& z; ^6 D - model: {- d& d5 w# S, N5 h
- renderType: "light",
# _9 I* c5 i' d8 ?3 F6 l8 T - size: [1, 1],7 \$ q8 Y! V3 F! Y
- uvSize: [1, 1]
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- }
& U2 N w% ?+ x, J - let f = new Face(info);
: E$ a+ D! r7 J - state.f = f;
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O* q% ], _: e, X% a$ P$ z- let t = f.texture;) E/ Q- z% E G# B0 ]
- let g = t.graphics;' L# c/ y- T% z& T& N: `
- state.running = true;
' W7 p& N, b+ F3 N7 d9 { - let fps = 24;
C- \ h; I' z m; W - da(g);//绘制底图2 Z& h' v2 c0 n. i- z: e7 j/ }
- t.upload();
# P6 Z; Q& P' j4 d- Z - let k = 0;
2 I! R5 r+ h6 \4 u - let ti = Date.now();- b% Z% P. a/ R6 `# w% G$ P8 a
- let rt = 0;
: X2 i Z5 F3 B( e* \4 ] - smooth = (k, v) => {// 平滑变化
) H0 o. j0 J: g - if (v > k) return k;- i( H& U A( C" B* ]$ E0 `
- if (k < 0) return 0; d% A% e" k* |& W! I3 H
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ ], w/ ^* w% X
- }
" f* C6 ~8 i0 c0 M - run = () => {// 新线程
7 M5 O3 a4 l# I0 p2 A4 ] - let id = Thread.currentThread().getId();: h( L/ R: t _* x1 O, D
- print("Thread start:" + id);
! v2 ]+ P* M1 y! g$ { - while (state.running) {
. a5 ~( t, W7 D5 x9 t7 ~ - try {
; s* t, C, O1 N& T - k += (Date.now() - ti) / 1000 * 0.2;
H: U. v, M3 ^) Z" s - ti = Date.now();9 T, _, s* W0 {! {
- if (k > 1.5) {4 ^" e. M0 J) u9 |& Q8 N
- k = 0;( g H. f: @ g9 n* d+ V! l* i
- }
- H$ t1 N4 h8 N( i( f: J - setComp(g, 1);
# ], g3 m! q7 c' y6 f - da(g);# i9 i" i @2 t y
- let kk = smooth(1, k);//平滑切换透明度
* r2 L: w, _5 \1 f2 ?/ | - setComp(g, kk); I$ G: O: L. H T( ]# o4 T% W( N) V
- db(g);
' P; m/ [ _- d- @ - t.upload();3 }! V2 o: @2 I/ o1 I
- ctx.setDebugInfo("rt" ,Date.now() - ti);: f4 |0 t" s+ N, X9 o; n
- ctx.setDebugInfo("k", k);
$ L/ }/ N, N& Y - ctx.setDebugInfo("sm", kk);! u! k2 s1 n$ Q T6 N" E
- rt = Date.now() - ti;5 P+ {+ Z* p* i) G7 Q5 R- \: O
- Thread.sleep(ck(rt - 1000 / fps));, u$ [% ]! z; G! Z( b3 J
- ctx.setDebugInfo("error", 0)9 r4 x1 U' H' Y3 w6 @
- } catch (e) {6 i! @9 @; @( a$ l( m& q |, r* G3 V, n
- ctx.setDebugInfo("error", e);1 ~% I' L- l; j& A. W' ?- d
- }
% {1 }; w* s2 V" \6 V - }; L4 P0 W5 f- M+ U) R# ^
- print("Thread end:" + id);$ s' b& e4 {4 u' z: `" G
- }7 u& T3 X9 d# |; x8 I& s8 g
- let th = new Thread(run, "qiehuan");2 E5 \1 q4 R2 i
- th.start();
! K% v6 v9 b% _4 C; n - }+ r& |3 Q% v& `. u* t0 N
- , F. k, J6 x8 T* m8 Q
- function render(ctx, state, entity) {
6 H' d- ~" m& F0 L& A - state.f.tick();
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- # M# e2 i" M/ ?- x. |8 L+ [
- function dispose(ctx, state, entity) {
& U4 Q( V0 o; }0 X5 H: [) q - print("Dispose");9 {: |1 B* M2 v4 R
- state.running = false;0 w3 s/ N$ n W1 r* j
- state.f.close();
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( e+ X4 P' @7 u* w: v) b- function setComp(g, value) {- J0 s l! x8 w; A( M& G
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 v$ @0 X4 w4 R0 D
- }
复制代码 6 Z/ P2 o7 v% c. u6 r6 A# k
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。1 i, H* m$ k% m3 W, L2 V
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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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