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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。
/ [* H4 F0 u( }+ w% q- importPackage (java.lang);' H+ K% [% D$ D
- importPackage (java.awt);
! A; q8 p, {" I9 S; {, o! V - 4 U# g3 A5 G8 P% O+ b+ {
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% W) p- ^, P0 h
: d1 C2 B; j8 r; u' K; |4 ^- function getW(str, font) {6 z" X% Y) x! S J9 m$ r/ p
- let frc = Resources.getFontRenderContext();
0 ?" [, j, q; S/ B6 U - bounds = font.getStringBounds(str, frc);, {% B0 G) h: c
- return Math.ceil(bounds.getWidth());
& l6 C$ Z9 M* |1 m - }
6 ?! q: }1 Q& g - 1 L. p8 N, c: w; C' i* G8 }
- da = (g) => {//底图绘制 s7 B; ~( G9 \9 [$ i
- g.setColor(Color.BLACK);0 V; h& s5 R; N" {2 U
- g.fillRect(0, 0, 400, 400);, f* h, F3 U, B" X( C
- }
6 P3 T: `7 |" ?8 O) Y1 D3 n" m) m% } - + E/ k) a7 A! p6 w% q% r$ n
- db = (g) => {//上层绘制
: H4 i3 ?! B O) @ - g.setColor(Color.WHITE);
8 J: _% R$ ^) ~' F3 _4 K - g.fillRect(0, 0, 400, 400);0 L( u6 N0 `, ^; @* j0 V2 J& D
- g.setColor(Color.RED);8 j q) J9 j; o: l( A
- g.setFont(font0);
) S; f n- a+ k% R/ Z* P+ Y ? - let str = "晴纱是男娘";
. U% p. O# o7 {2 c1 L+ Z; ^ - let ww = 400;/ i. [8 y7 f& a+ B
- let w = getW(str, font0);
( q8 _) `/ T! T8 O2 H6 ]0 V - g.drawString(str, ww / 2 - w / 2, 200);
8 w- F( J6 C9 p% d% L4 G - }
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( F- g j- K9 i) G$ `2 f- const mat = new Matrices();
6 ~1 Z/ B$ l& F% K/ V2 o" N' P, { - mat.translate(0, 0.5, 0);; l. E! x7 E0 V2 [" ~2 p
7 b8 _9 [5 @* {# ^- function create(ctx, state, entity) {1 s" v" N$ G& R
- let info = {) J& }# M! Y0 e' L( I: E1 {# k
- ctx: ctx,
$ ^" Q0 w+ M% k$ u( R( B - isTrain: false,3 ?7 K a# s. J# N; w
- matrices: [mat],
1 O, _( q8 w6 q6 E" I9 W1 ` - texture: [400, 400],+ g" s2 E" t& F5 Q0 y. `
- model: {9 P6 c1 B3 @, C% o7 h
- renderType: "light",$ f" g2 ~: v( B1 F) i8 O) x
- size: [1, 1]," f) u1 X, l& e# V2 y: L5 ~) |/ {6 O
- uvSize: [1, 1]
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- }$ a$ F; i) G; M& ~
- let f = new Face(info);
4 u9 @2 Z( t7 x: C! P& }4 M - state.f = f;9 @/ g% s6 o6 ?
0 N) g) a% f) t( v: t- let t = f.texture;1 j% o1 Q' p4 X+ Q
- let g = t.graphics;1 f3 M2 S4 o. N; I% V; i( e$ _
- state.running = true;& v: v4 C5 K# L( L/ g. }
- let fps = 24;- H# Z* d! t5 x- o" I
- da(g);//绘制底图) |7 F* r: n) j# A1 ]3 m
- t.upload();0 t+ T) N& _$ ^! {7 a
- let k = 0;! h# f" Z0 l1 S" R- t( q1 _4 `! H
- let ti = Date.now();
5 n L: Q) V- a+ O7 L - let rt = 0;
T8 W8 X: c2 a1 g - smooth = (k, v) => {// 平滑变化
0 p# s1 j" B1 I9 S - if (v > k) return k;6 I. _8 j9 p2 \3 h, L5 W6 o# p
- if (k < 0) return 0;3 m p; P+ F9 i: ?) G/ k
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ \. i# |: b0 h7 D
- }8 E4 J C4 p! R, v
- run = () => {// 新线程
6 C7 M: W, J9 ], x( F5 u - let id = Thread.currentThread().getId();
: @. t: b; ~: {: F+ i4 | - print("Thread start:" + id);
% S. P6 n4 i0 D6 [$ O5 p% H7 I$ f - while (state.running) {
- u$ G% j; {+ @ - try {, b0 x5 k* T% N& s9 A6 `; O4 T* U: P
- k += (Date.now() - ti) / 1000 * 0.2;
& ?% X" r! M& T6 y; Y2 c+ y+ o - ti = Date.now();7 q0 K. y+ k3 K! G
- if (k > 1.5) {8 T& _. K9 A8 t I8 L- B
- k = 0;
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- setComp(g, 1);
1 G* _/ }$ c3 s0 I2 m# s* M - da(g);
E0 U) w# M" C - let kk = smooth(1, k);//平滑切换透明度$ \ k7 ^/ o; n+ o9 @5 Q
- setComp(g, kk);
4 \4 \! l8 \' m" z - db(g);
, V1 h* T) j' w6 L3 I* K( h! ?8 S4 l- y - t.upload();
+ x7 c( H* p0 W# F+ |& ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);
. u! P, c7 p) A3 G: s - ctx.setDebugInfo("k", k);1 e( f l2 y; s2 e% f: _! ^/ W
- ctx.setDebugInfo("sm", kk);
6 t( W8 c6 t" _ o; g( S - rt = Date.now() - ti;
0 x' ~3 L. C' g& h' n" ^1 w - Thread.sleep(ck(rt - 1000 / fps));2 I$ W P& I: k5 l& P9 b8 {& n
- ctx.setDebugInfo("error", 0); X7 p& J1 \# t3 d- S3 Y1 ~
- } catch (e) {4 i8 d1 Y, }( g: p$ u6 y' w
- ctx.setDebugInfo("error", e);& Y# e: i) S" w1 v
- }
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- print("Thread end:" + id);
$ U a# O3 V! Q( s - }
) K; q3 e" M7 ?" K8 H8 r& S - let th = new Thread(run, "qiehuan");8 _4 S% D9 k4 T& p
- th.start();% V7 ?7 J6 b8 }' v% z
- }% N7 Y/ v' H, c2 o4 v6 y& f2 a5 r, U
2 y/ P2 f. H+ o' m8 D$ f( w# t2 i* {- function render(ctx, state, entity) {; }7 W8 [/ N7 P$ m( k
- state.f.tick();
9 s# z9 R% E0 h2 T# l - }
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+ r4 r; v) s/ h4 X- function dispose(ctx, state, entity) {
: P3 L2 C9 U+ ] - print("Dispose");2 m+ i9 _$ J7 ]0 b
- state.running = false;
! e N9 {9 P" Y1 W H0 N. | - state.f.close();
/ ]# v/ M: G. U1 W - }% ^0 x! q! G5 v6 C& D8 [- i
- 1 {5 p6 I/ a3 H+ d
- function setComp(g, value) {, E% f. Y1 z/ g9 l) y& p
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 M' B2 k4 ~7 D+ V9 z; Y9 y - }
复制代码 # ^; X* O& Z/ l2 I% ^* U
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。5 O9 Z, f5 j" c# 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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