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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。
; A L/ t/ q7 r, W+ z3 N9 a- importPackage (java.lang);
! g% N1 S9 K! B - importPackage (java.awt);! N( ~6 P& M- x I, m
% i8 O2 [' R7 \# A% R- include(Resources.id("mtrsteamloco:library/code/face.js"));8 S. ~0 B: ?' y- x- R9 R+ F! D
- 6 O: l5 F, a8 v( A
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);% [8 P* F' l8 H3 H2 r6 H3 L
v9 U! J d9 c3 t" x- function getW(str, font) {& V* h6 j3 N( \3 E0 N4 }& b0 g f
- let frc = Resources.getFontRenderContext();2 M# S, v) u5 A
- bounds = font.getStringBounds(str, frc);- A; z! z/ C# f
- return Math.ceil(bounds.getWidth());! P* |% D5 s. I# ~& T) g
- }
) w9 I% O! N; B: \( }0 R7 _ - 9 L% w; |: K. L" c1 t
- da = (g) => {//底图绘制
1 t/ |' T7 c) ?0 g: Z0 x, R - g.setColor(Color.BLACK);0 D, B t9 x( m! |9 e# h( ~% o
- g.fillRect(0, 0, 400, 400); q) b' c8 m; x4 f# E. z
- }
1 l0 b( t# r1 C% J - + P( z8 q, x2 R; e* t, f0 D
- db = (g) => {//上层绘制
2 A- D. G0 @& n - g.setColor(Color.WHITE);
4 q, i% [$ F5 t' O, j: ~0 f$ S - g.fillRect(0, 0, 400, 400);6 S0 Z9 \& l$ y# P- {$ F/ j
- g.setColor(Color.RED);
# ?' p) @# a; }9 i - g.setFont(font0);8 ~' X% i9 ~7 U/ Q
- let str = "晴纱是男娘";- g8 m8 X( `+ F$ W9 _' _' G' S* t7 u9 |
- let ww = 400;: s" _2 b$ D5 x0 |4 s
- let w = getW(str, font0);+ ~& B2 W. I: {
- g.drawString(str, ww / 2 - w / 2, 200);' N' ~: q r5 \
- }& N- q- t, t* M6 |- j
; ?1 |& A9 I2 z, G4 K: e- const mat = new Matrices();
/ Z% L( J# H# S5 T3 A' l+ o8 x - mat.translate(0, 0.5, 0);9 x# b4 R2 c: h! I/ x, e2 \
- & l( S& f# }9 f( g8 V
- function create(ctx, state, entity) {$ D, H$ C5 m+ M& n+ B( A
- let info = {+ B& y8 A5 P# Y; G9 e7 K* F4 M- p' S
- ctx: ctx,
( ?2 B3 f- o8 H, P7 Q, p - isTrain: false,+ X# h* [, o& i) ^: n/ M ^
- matrices: [mat],8 x/ w$ L% h; }7 d
- texture: [400, 400],
+ w2 W5 s3 o0 A# r, s - model: {
: ?( o) }) k8 e7 H - renderType: "light",# m! l; l$ J5 S$ F2 U
- size: [1, 1],# l+ r( x g" B* b
- uvSize: [1, 1], u* O v1 M) S' G
- }
3 Y( |# F% z4 T. K c( Z - }% X! I# p4 n6 W- ?8 \
- let f = new Face(info);/ w( c! m4 s* P
- state.f = f;1 u: }( w( {- A6 J3 b7 P) }* ^
- 2 l6 ^0 \- j1 ?8 g( P
- let t = f.texture;
6 Z9 z- @& C# s# ]3 n0 K8 G. k/ k - let g = t.graphics;7 D1 n) r# t5 j; u% p5 _, g* U
- state.running = true;
; c9 u3 Y& v/ V( v! u, A4 ?1 u - let fps = 24;# t5 p6 Z& j- {8 O Z) c' y( n$ ]
- da(g);//绘制底图. q9 M* M; l" b# u
- t.upload();6 P1 H s) q7 C5 \; y7 k
- let k = 0;
/ a3 ^; K6 c2 x9 g8 Z - let ti = Date.now();
) }' \4 c7 T' z; K$ l- ] - let rt = 0;5 W' h# e9 b. J% B5 b/ r0 b
- smooth = (k, v) => {// 平滑变化
/ A* V7 M; y; B! d - if (v > k) return k;
! _4 h d3 i* s; ]- A; R+ c: m - if (k < 0) return 0;! ]5 B: R$ Z2 u% I9 |
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' ?, `) H9 n x+ D' |
- }
6 X0 y$ D& N6 S+ h" L8 t - run = () => {// 新线程
. b) E% d% g0 ^' d - let id = Thread.currentThread().getId();' N" P5 D) f6 q) U3 |4 m* g
- print("Thread start:" + id);% w F! I+ H4 Z$ f( V
- while (state.running) {
- M: I! ^9 y# P6 Y }/ Z5 s - try {
\- V) A8 C! O3 i+ j6 }2 T - k += (Date.now() - ti) / 1000 * 0.2; N& I) @/ E* I8 D
- ti = Date.now();
) Y! k! h4 D6 A! H: X - if (k > 1.5) {
8 b" ~. Y; M2 ~' H5 K - k = 0;
2 l" H7 \, L# M6 L! F - }
8 r# F! D: d, J6 a/ H% W# h/ ~ - setComp(g, 1);
( x! W/ e% C* |3 U* M9 S - da(g);& U7 b1 U& \9 @ c- {
- let kk = smooth(1, k);//平滑切换透明度$ L9 N4 a3 Q! A- T; G% ^. h, ^% x
- setComp(g, kk);
* z4 V& |* M+ M. T; |; ]6 k8 z - db(g);
6 s1 S" m7 d# G6 n S; y/ M - t.upload();, B9 @/ d% f6 \2 w: ?* Z" a
- ctx.setDebugInfo("rt" ,Date.now() - ti);
; e5 \! q+ n( G5 [" R" I - ctx.setDebugInfo("k", k); B% R1 e, O7 G* ^- L) x# N+ j7 m
- ctx.setDebugInfo("sm", kk);. |' ], e3 ^6 f: k
- rt = Date.now() - ti;
1 Z5 B' I9 U' I- l - Thread.sleep(ck(rt - 1000 / fps));
, H' ]' j( t V - ctx.setDebugInfo("error", 0)# u: d# d. f& K
- } catch (e) { V w4 A J* {/ b( m# M' l+ Z
- ctx.setDebugInfo("error", e);
: U4 k4 t; _) r t3 P1 v - }- b6 G; Q% @6 I
- }& z, _8 U- W5 ]( d( a1 R
- print("Thread end:" + id);
+ {' D I3 x: A - }% L* ?. U3 j/ ~6 Q4 Y
- let th = new Thread(run, "qiehuan");6 O9 e/ M' g+ Z) n- D: G! {6 S5 [2 W0 L
- th.start();* a* }/ i: y) R4 p2 \- ~: L! m* T
- }, h$ U+ G3 {+ S2 m K2 f' K
- * W+ n" x5 T; Z0 Z
- function render(ctx, state, entity) {
9 W8 \6 x! p4 ]+ c) g - state.f.tick();
8 o* u+ p( { L* n Z \6 i% B - }
% ~; j: t! f/ ]( k: z0 @% }( H& \
/ n {" n7 w: [$ T& S6 \- function dispose(ctx, state, entity) {
8 i8 M" l/ N( Z7 B; \ - print("Dispose");/ l- R2 g r# Y5 w1 N( m
- state.running = false;
: j1 O+ B) }. L- S$ N$ D0 F9 ] - state.f.close();
9 c5 S& v7 O7 x- z - }7 Z" ]# Y- l2 Z
7 Y( J5 ~) G; z+ w! d+ D7 Q5 p- function setComp(g, value) {% ^* U& l G/ A( _5 R, S, k
- g.setComposite(AlphaComposite.SrcOver.derive(value));
' L/ X- q6 P5 y% N - }
复制代码
% }* [) _# q. R( y; T7 ]% U0 c, l1 w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。
$ c7 O, o8 T6 ?5 r" e: {9 _! T+ H0 |) N9 K* s+ y6 B
& M, v5 U& k* n; f4 v顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ U9 O1 x! B% E& _9 Q! M8 Y& J6 A
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