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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。$ K- {$ E6 R& `0 a$ {
- importPackage (java.lang);
0 ?& N% J! `8 O9 l7 o4 a3 H7 s) f - importPackage (java.awt);& S5 d v4 d, |* }* s3 L# I
- # ]# k8 }) R; d3 r
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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) c' h( h5 w. c! h: L3 L6 V9 N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 W# W7 ^+ M1 |& u- W. E2 \
# E7 }* @* L# S( K. O- function getW(str, font) {
. A. e, g3 e: @# v. M* g+ A. ~ - let frc = Resources.getFontRenderContext();
$ e! ]8 B+ J$ }, L" A& B1 Q+ r - bounds = font.getStringBounds(str, frc);
@( o" n* f' o - return Math.ceil(bounds.getWidth());. g* D5 n k( f
- }
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; o$ S( e* h3 N. Z( n- da = (g) => {//底图绘制& l, n2 V* J% o/ Y/ D
- g.setColor(Color.BLACK);# G$ B5 [8 Z) P7 a2 k6 o
- g.fillRect(0, 0, 400, 400);, `7 t* K2 ~4 u( A$ F9 x) w1 C6 M
- }
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- db = (g) => {//上层绘制& a+ G- o+ r' h) \
- g.setColor(Color.WHITE);
, _+ }2 T9 i, W3 a1 h* ]! U3 m6 Z0 R - g.fillRect(0, 0, 400, 400);
1 W! H" B2 ^7 c$ L$ @* d& A4 m9 ^# U9 X - g.setColor(Color.RED);. Z8 I: z( L4 y9 m: g3 _% u$ a4 U
- g.setFont(font0);
) n1 ~) B* ~) G: ~& k, ?& K - let str = "晴纱是男娘";
) G/ a2 r; r! ]' {5 l% l: s - let ww = 400;
- C% [& |5 ?+ C( v4 `- U o3 ?& \ - let w = getW(str, font0);
- r- U- d8 h% O) { - g.drawString(str, ww / 2 - w / 2, 200);
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$ f0 |$ P% Z. V- const mat = new Matrices();/ F$ b7 y1 d/ b* m
- mat.translate(0, 0.5, 0);% E& p: K; D8 p* N# q
- 2 q: W1 G+ b& \
- function create(ctx, state, entity) {
1 O0 _% Q; _' U' W. ^; E0 E - let info = {7 j5 z5 r" e: F: o' ?5 c
- ctx: ctx,
0 z5 j# X3 C8 q/ t" k, B - isTrain: false,
% \$ x6 q, s4 w2 @, A - matrices: [mat],/ e3 H. j( c# p- l9 J' `' G
- texture: [400, 400],
+ }/ G4 p1 Z/ L7 N8 k - model: {% Q/ s$ [: l% a. g; ~, n. y
- renderType: "light"," X6 _) L5 ?* n0 V4 O7 J0 G
- size: [1, 1],! o' j. Y# T& u6 z2 b. p- ]3 C
- uvSize: [1, 1]
* a. r. G% T( c( M) U& d" ~2 I - }
. O7 |8 j0 H" L+ m- Y# ? t% S8 N2 k6 i - }
1 Q% D9 k: k, Q. t9 P - let f = new Face(info);/ V+ y( t; {0 f9 k I6 T
- state.f = f;( e; N. L9 a( p; [* i' v* y( z
- 7 {0 h% \/ G% j$ K# F5 e! G' X) {
- let t = f.texture;- T- k7 m# |9 B+ v( K
- let g = t.graphics;6 |' ^' X! h, [6 V" p: C% s
- state.running = true;, d3 d- o' N( P& t: D) h
- let fps = 24;
- h3 A5 X, x- h. u - da(g);//绘制底图' s7 E( \& d7 C
- t.upload();
; U& \ z: M3 f- K# Z7 b - let k = 0;6 {% O% D, l# {0 g2 q! r
- let ti = Date.now();* O$ _. [3 @! Q1 C/ f2 t7 ~6 K* x
- let rt = 0;
R8 W! v1 k! N5 {0 h: ~- Q - smooth = (k, v) => {// 平滑变化- y9 L* B$ U* F) E Y
- if (v > k) return k;
2 M- L: [" c8 U6 [1 L - if (k < 0) return 0;
8 X" _: {5 C( X- q3 c7 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. i' X, F1 K& n8 h - }
0 A) H: g2 e8 j. p/ `% x - run = () => {// 新线程) x% K6 j. n' R( U# z/ [" o9 f
- let id = Thread.currentThread().getId();6 H- F% X: r: U4 L
- print("Thread start:" + id);
3 L, b9 V3 s8 A/ o4 O& f( l - while (state.running) {
+ `8 ]% s9 q" Z$ d9 K( z5 S - try {; u: D1 j) J, T6 S- K5 F3 {
- k += (Date.now() - ti) / 1000 * 0.2;
2 V: R) Q6 k* {" S1 } - ti = Date.now();6 w2 u& ]2 L) i4 A
- if (k > 1.5) {+ F% t7 j: v7 W/ c- a* e
- k = 0;
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- setComp(g, 1);
0 {7 l7 T+ p, K' W+ R1 j( l# M+ I - da(g);& i0 ?" k% H& M0 m/ |) d0 S
- let kk = smooth(1, k);//平滑切换透明度
$ ~7 |- V; e* u7 m3 m' [& N$ {" ~ - setComp(g, kk);
' E9 x' q: v0 x" | - db(g);
# [2 W% U/ j8 V2 J+ {+ o% X' @ - t.upload();
+ f7 g) b3 k* L _5 R# P% Q" O) M! r - ctx.setDebugInfo("rt" ,Date.now() - ti);7 V4 _* _1 M; O8 r
- ctx.setDebugInfo("k", k);
% `2 ^5 \! ~0 X - ctx.setDebugInfo("sm", kk);
9 m1 x1 I& C! [3 ?0 D - rt = Date.now() - ti;+ E% g% K, F. G, B$ `) ~4 f
- Thread.sleep(ck(rt - 1000 / fps));
3 \7 @4 q( B( ?4 U - ctx.setDebugInfo("error", 0)
7 G6 M% T( L; H - } catch (e) {4 I; }, U `' ], m
- ctx.setDebugInfo("error", e);9 A* J% `. z$ I! f
- }. N7 P Q8 ]% h
- }! i3 I" F% E. t/ r) O1 N- j
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");5 R$ F8 i3 f3 l; a# h
- th.start();
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! `2 q% U4 K; `+ I1 l8 ]( O( f8 G- function render(ctx, state, entity) {1 L! n' b: ^# f
- state.f.tick();
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" f- j2 n! M; e% ]# _- function dispose(ctx, state, entity) {* g5 {7 s% g& Z8 a9 U
- print("Dispose");1 i# N ~) L' S: y) P3 v
- state.running = false;. Z8 d2 S& f! h
- state.f.close();/ J/ j& V- R* K6 D$ A/ ?
- }
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+ U3 q- }( H) q; u- function setComp(g, value) {) L+ B5 w9 @: P6 f4 K7 V
- g.setComposite(AlphaComposite.SrcOver.derive(value));- d. [- V l- C* f u
- }
复制代码
, Y( `: Y: t+ S5 c3 G3 V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。4 [* [' v( l7 K7 H4 o8 C/ K8 B
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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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