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- k( g; v/ P3 u4 Q( H( S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。
g$ [0 ?1 w5 j4 `* Z! U8 x- importPackage (java.lang);$ p- q; Z: {- ~ T/ p/ i6 y
- importPackage (java.awt);
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) b7 E! T& O# U2 V3 x- include(Resources.id("mtrsteamloco:library/code/face.js"));
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o5 n& H% k, S+ F- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, d% i4 q4 }- G/ u4 y! x
& K; ~/ r8 ?! g- function getW(str, font) {
* A" K% K6 A" q, y5 E4 u - let frc = Resources.getFontRenderContext();+ V# X1 l& L9 V9 m
- bounds = font.getStringBounds(str, frc);
8 t" O4 C' Z2 M- t - return Math.ceil(bounds.getWidth());3 |1 T8 c. V/ u2 {' _4 t
- }; a( S9 i% M0 g6 n
8 Y" y& i$ z( g- da = (g) => {//底图绘制
' Y+ F+ L9 v3 [" o. F( Y: ` - g.setColor(Color.BLACK);' ?3 m% t/ x! A- a% v. q% t0 l
- g.fillRect(0, 0, 400, 400);
& y& q3 \$ [; V% _! H - }, ]0 Z" Q) A* ^' ^, {
- * k0 i6 _: y, V0 n! R, g" b
- db = (g) => {//上层绘制
3 P" n$ B0 ~9 a% \7 P m - g.setColor(Color.WHITE);" }) I+ o& w/ G+ Z9 b9 I6 x4 W
- g.fillRect(0, 0, 400, 400);" S# o0 u+ b! i6 _% k3 a
- g.setColor(Color.RED);& R' z6 Y% x4 a' v7 S
- g.setFont(font0);
' C: P0 U# Y! p - let str = "晴纱是男娘";
c0 H4 m! z6 Y - let ww = 400;" ]( D" G" Y, Q4 U
- let w = getW(str, font0);
4 T$ x5 I+ ]' p; _ - g.drawString(str, ww / 2 - w / 2, 200);# j- `, O- S$ v( _% }
- }
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; o/ a! f" Y: W# c" q3 r- const mat = new Matrices();
3 K6 m( x4 t! k - mat.translate(0, 0.5, 0);( Z+ u3 C! f1 j! r
- ! c! b% M) K+ A4 x2 G. G
- function create(ctx, state, entity) {
5 @: F& s* z" s$ J5 P - let info = {! i! W3 S& b6 c! Y' Y
- ctx: ctx,& h2 ~$ T, w* x3 x6 n8 r
- isTrain: false,
& ~4 r& Y$ f1 r0 N5 N9 x - matrices: [mat],8 N, f1 L* V; B# _
- texture: [400, 400],
7 l9 O' H, D/ g& X, X - model: {$ b+ f+ R# R F/ m9 B
- renderType: "light",$ d0 x# y0 M: w9 z- ]3 c
- size: [1, 1],4 L: _' H0 f/ k/ c* X* s* @
- uvSize: [1, 1]. _' s7 ^7 r! A' r) a) ~5 ?
- }
3 I- K7 j0 f4 A& r0 g - }. y1 y: j& Q, {) Q
- let f = new Face(info);
# R8 R( Z7 E- ~. G+ [% Q - state.f = f;3 c6 `8 V7 O+ q* o
- 5 Z( ?$ s; O& L: d& G( c x% R0 R
- let t = f.texture;
& G8 I! F8 X8 f0 S8 B6 s7 a, D- H: { - let g = t.graphics;
; D! } b- `1 @ - state.running = true;
: }- O& l; R, B; _2 ]9 ^; h - let fps = 24;
$ n, L. T& R# r$ | - da(g);//绘制底图- q. _) F4 H3 I' D! K3 B- M @
- t.upload();
; @* J; ^, |$ O- }9 { - let k = 0;
7 J1 K- M/ c8 p2 q+ o5 w - let ti = Date.now();+ e E/ q3 e V) w4 v
- let rt = 0;/ S4 J" H% B* R: N7 ?! f
- smooth = (k, v) => {// 平滑变化% w/ z1 |- O9 y( |# i
- if (v > k) return k;
& @7 M1 A. i+ t g$ E( R) N - if (k < 0) return 0;
" Z8 A0 L( a/ ] [) m - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" U# [5 E9 Y, i f( ? E. ]
- }% U( y$ R# m+ i
- run = () => {// 新线程
! A" q1 ?+ ? d! U# M4 G - let id = Thread.currentThread().getId();3 K7 D8 }6 L# S
- print("Thread start:" + id);) `- ~. n5 [% W
- while (state.running) {# X9 Z6 r i- V- n! m
- try {8 U& |% Q- T4 z
- k += (Date.now() - ti) / 1000 * 0.2;5 K' X6 L; @+ y5 P0 [- g, W3 T
- ti = Date.now();
) {. d# u0 ]5 c0 j - if (k > 1.5) {
$ j2 f# W+ i) M( p3 K - k = 0;6 o: ^6 E, X6 @- [
- }5 A1 W. t- ~$ }0 Q, }3 ] j
- setComp(g, 1);: G" ?' r( d: _4 ]
- da(g);* z/ J2 j& p- h
- let kk = smooth(1, k);//平滑切换透明度4 S/ W) L3 ?. b& Q3 r
- setComp(g, kk);
2 Q3 x4 q: ]$ v! U4 p* t9 [# y - db(g);( s e+ A l* _; O; i6 N8 J
- t.upload();/ u; I; ?" c% w$ E3 }: s
- ctx.setDebugInfo("rt" ,Date.now() - ti);# m8 m0 u5 m! T+ a9 x% T) z
- ctx.setDebugInfo("k", k);& c% O) f7 e" K+ X4 W7 o* c4 k
- ctx.setDebugInfo("sm", kk);: Z: K1 T, p3 \1 [+ R( ]
- rt = Date.now() - ti;0 P ^ ~, s* Q0 I9 F) D
- Thread.sleep(ck(rt - 1000 / fps));2 E! k' u) \9 |$ i0 N$ Y
- ctx.setDebugInfo("error", 0)5 F- J1 |$ |5 R% ^. v
- } catch (e) {
# K. q# n# u0 F4 d - ctx.setDebugInfo("error", e);
- E1 [+ ^) n, e2 N6 I) P - }
+ d9 C9 l' \) h9 D7 m$ q - }$ k( `, d7 m) t a1 K1 L
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
* P9 Y& x% c- C* D( t - th.start();
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2 l c1 M% M1 M4 l6 j0 R- function render(ctx, state, entity) {' w$ m- c' G" K# Z2 [+ T
- state.f.tick();* u [! O+ T. t
- }% P8 e2 d; B {2 K3 m3 |8 g
2 w8 y6 H6 Z. N' Z p" n- function dispose(ctx, state, entity) {
' U9 O( \& c9 A! G! N( \6 h6 l - print("Dispose");
9 C- H% N6 T4 B2 p1 | - state.running = false;5 r* p5 Y4 Q/ h1 v* y: s
- state.f.close();
5 K% U x, j$ @7 T - }; E, u& y5 s! l- j/ R6 r" Z ~2 X
- & ~: W: [8 g- } y" E7 J( e! G
- function setComp(g, value) {
& L, R/ M+ {/ Y+ I% k - g.setComposite(AlphaComposite.SrcOver.derive(value));9 B* @$ ` |/ B/ f* W2 h8 B$ }
- }
复制代码
5 u2 ?. i1 x8 n* 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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' x8 q4 y" h7 t4 f顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( I% J8 _* L. s/ l# {$ r
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