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( F+ U0 Z7 _7 D7 w0 H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。
) ?# a" ?+ B- C( D: `) [; E6 i6 e- importPackage (java.lang);" f2 c0 w' z4 ^0 x7 K' n
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));$ W- V( A: W% F3 I) O# n; I! R
$ O7 ~5 s/ y9 _- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, R* a, l% c% k0 V; w: a' y) t
6 C/ M' }7 K9 i/ T- function getW(str, font) {2 g2 x$ U& X' v
- let frc = Resources.getFontRenderContext();* A: [( L2 y- n, {
- bounds = font.getStringBounds(str, frc);
$ }0 s ]1 A1 Z- x - return Math.ceil(bounds.getWidth());
5 k/ w: S' o3 {: O/ X$ n - }/ |1 Y/ c5 t+ L# U+ r! C/ K$ j3 n
- ; Y! B$ I u( v" I8 V' p
- da = (g) => {//底图绘制3 k: C$ ~. q' r' z
- g.setColor(Color.BLACK);
# h1 P& z0 p' P% l, G: e - g.fillRect(0, 0, 400, 400);
7 b( y- T5 |4 U& G# O& I - }
+ b3 C. q7 e9 x6 z2 f0 Y- u: q* N$ C - k2 ^' |5 I9 P+ \3 ^
- db = (g) => {//上层绘制
- [1 D: B+ I, K4 N - g.setColor(Color.WHITE); J2 n' @ g' a/ w% L1 S
- g.fillRect(0, 0, 400, 400);
) N& h) c1 d8 a/ c l - g.setColor(Color.RED);5 _' x$ o: S, K- ?0 F2 F( y* d* c
- g.setFont(font0);5 ~7 j& K, a% S! |9 x6 [; m: V- I
- let str = "晴纱是男娘";' k6 |% \0 T T& [
- let ww = 400;
0 X5 E S+ B+ D7 x1 \" Z: w9 d - let w = getW(str, font0);1 P R; c- _7 y B7 r9 g
- g.drawString(str, ww / 2 - w / 2, 200);
- ~4 e* G2 C- H; U: _ - }
2 G1 C4 P3 I4 @" ]* L
! \$ f' {6 D2 p: U- const mat = new Matrices();& f- C P+ o/ E8 Y3 w, j$ f
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {. F4 M. D g! ]0 k
- let info = {
3 G+ f8 z+ ^: v7 w$ L& {1 M - ctx: ctx,
4 f7 O$ t/ |) f - isTrain: false,/ b3 f4 x* N" h) _- {& H# W
- matrices: [mat],
6 A q( `5 [+ a# O2 r - texture: [400, 400],7 g5 |# j3 g: i* }2 C5 D* L. b. B
- model: {
# L( w, K2 H3 K+ t, E! S - renderType: "light",: n8 M& b% G f4 U. D
- size: [1, 1],0 x2 J# ^: m* i' P2 |: e
- uvSize: [1, 1]
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- }* X. z- C) V, n4 z) j2 G
- let f = new Face(info);6 k: s: `3 v9 ?
- state.f = f;
8 n) A. S% B; w% o. s9 o$ B+ ]
* z, Y) \6 M5 Y- let t = f.texture;3 r/ D; Y& m* w( h' U
- let g = t.graphics;* W/ Y n% F- Q" T
- state.running = true;
4 x' q$ d/ t/ q1 @' } - let fps = 24;
" x8 n; E, A% Z! h; K) H - da(g);//绘制底图
* W1 p# t. v% N" s, i& [ - t.upload();
4 a& u7 D0 r' Y2 h1 C. M - let k = 0;
" W$ Z! K. N' y- Q - let ti = Date.now(); z/ U9 U+ X! S5 c2 S+ H
- let rt = 0;" Q0 R* X' h9 E3 \
- smooth = (k, v) => {// 平滑变化
+ ]0 m7 e9 g$ n% h - if (v > k) return k;/ V/ P$ J0 S) L2 i
- if (k < 0) return 0;' j& a5 t; \, u. g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) r8 B3 b0 _9 B6 a5 M
- } W9 F5 p" W/ [2 \ B8 ^
- run = () => {// 新线程
4 q; i* s& _# h: @ - let id = Thread.currentThread().getId();7 Z9 ?1 [) U1 E
- print("Thread start:" + id);
6 n, p8 G+ \2 b9 A8 ] - while (state.running) {
1 l7 u8 a4 |- m& O8 l - try {
; ^8 A6 G; P8 p& L4 z0 s. f( q; e' [ - k += (Date.now() - ti) / 1000 * 0.2;& ?+ w* Y, L7 k: x! I$ i
- ti = Date.now();5 w" i8 X& d8 p; N; y' O5 Q( k& [
- if (k > 1.5) {" d5 Y n: M! H. b
- k = 0;
& T' b V: {1 H+ b7 j$ G+ E - }
' B% x; f3 S! S+ d1 B/ G - setComp(g, 1);
7 l K4 \5 b9 h$ [" O9 |) _ - da(g);, W S* a' [5 m4 ? X8 Q
- let kk = smooth(1, k);//平滑切换透明度
$ O3 c/ p' s/ x% z4 G% J - setComp(g, kk);
' c" f5 D8 [, M4 @# [9 L/ T' }$ c+ H - db(g);
' Z- f | Q+ Y/ `' C - t.upload();
2 ~3 q4 P/ L) X" I. N) z7 ^ a - ctx.setDebugInfo("rt" ,Date.now() - ti);% X R! r) _$ t7 V6 _
- ctx.setDebugInfo("k", k);
# k8 z3 p; w! K& P/ _% f/ j - ctx.setDebugInfo("sm", kk); q/ f9 }2 {$ _
- rt = Date.now() - ti;: f+ A, t0 s/ p; U
- Thread.sleep(ck(rt - 1000 / fps));
- U) ^+ q) [' o9 Z1 r7 X% [ - ctx.setDebugInfo("error", 0)( r4 Q) ?- r8 Z/ A! q
- } catch (e) {
; X6 E2 [ o8 n. v+ e/ K( Y: t - ctx.setDebugInfo("error", e);6 i6 v/ e- V" e5 M) c8 Y, q
- }2 r: [4 t' e- Z, \! h6 W
- }6 a. T/ o: Y2 D2 m5 j# }4 a4 n
- print("Thread end:" + id);
! L( [4 ~. S& w: R: j. G - }
3 i& Q6 f/ k2 i1 |5 l - let th = new Thread(run, "qiehuan");& o g# F3 R' Y0 C' ]
- th.start(); D( ^3 N9 q; R* J& L) a& c; P8 E
- }
$ m6 T2 k& j" F5 A2 |2 r
" N% x5 V8 X# ?- function render(ctx, state, entity) {
3 n! ^2 ~, D ]( P - state.f.tick();1 ~" a( _6 z7 g/ X* V% c
- }
, O. r: g! {7 ?3 r+ A
@& ~2 c+ @1 N* ^: |' @) N, G- function dispose(ctx, state, entity) {
$ e t% d. T* J0 h) U, u+ _# Y - print("Dispose");7 V# p" I8 S2 P% ~5 I
- state.running = false;# `1 r/ s8 ?. U# G9 l
- state.f.close();. u, z( ^' e" f
- }" g: Q8 o: l- e- F3 C: }8 E
- ' j/ B# q' x9 B0 u
- function setComp(g, value) {
7 M: H. r2 S' G3 g - g.setComposite(AlphaComposite.SrcOver.derive(value));" n3 @; L' m. U9 e, \7 {
- }
复制代码 1 \' Y7 f) ]! {5 G: N
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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. m! |+ u" Q* b6 r+ _8 L$ X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 ?! }) B! d* i- A- \ T+ r& t
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