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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。
; I, C' v+ p3 G: G" \- importPackage (java.lang);
& w. \ X: d0 j" [, y - importPackage (java.awt);7 \6 m @4 o7 t0 J5 ], n
9 c! p; N3 l2 I' ^% L" M- include(Resources.id("mtrsteamloco:library/code/face.js"));( q7 x9 F& J! U) Y- E" x. a; y
1 Q1 v' U* G/ H) B7 k3 K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 d) B4 d' j0 |0 Q9 _
# P, D, r( B: K- function getW(str, font) {
6 O6 L5 w. R6 X4 ~$ ` - let frc = Resources.getFontRenderContext();
6 B5 o* q3 Y: C+ Q - bounds = font.getStringBounds(str, frc);
4 l, g- q- {% }* I/ V - return Math.ceil(bounds.getWidth());
+ U' w0 ]2 P. Z4 J - }; p9 w/ P+ C6 \& g
- % Q5 d% K: _' q
- da = (g) => {//底图绘制) p8 ~/ W! H- n" D) A' o& H+ o7 a7 p( K
- g.setColor(Color.BLACK);1 ~' f8 O* {% Q, Q. v
- g.fillRect(0, 0, 400, 400);( H& U4 Q6 A7 D9 W, N5 C$ ~9 @
- }
# P m) j% s9 d( c" m: p( Z
5 F) N, {# L$ \8 Y- db = (g) => {//上层绘制
9 F$ W1 n( C$ g' ^9 D - g.setColor(Color.WHITE);
$ t: D& X3 {4 I+ V+ t1 V) F& D - g.fillRect(0, 0, 400, 400);
; c* T' }9 N1 T1 [+ o G0 P* l - g.setColor(Color.RED);
! d. r) t8 c8 s% L1 y5 T! x - g.setFont(font0);
5 L$ K" z! G: ]8 N* @& { - let str = "晴纱是男娘";$ `' s. }; r/ a9 y; i
- let ww = 400;
: b+ ?& d$ J& A/ n3 K - let w = getW(str, font0);
1 p# w- ] M) I& `: F, i - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();2 B. t" N( Y8 |3 L2 X
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {1 p* ~2 ^1 H) T; t6 ]. |
- let info = {
5 B% n/ r$ @* g# K7 U0 a g - ctx: ctx,
: T) V ?, x7 h6 _1 A( d+ b; H+ [ - isTrain: false,! l2 ^# s# b9 ~5 m( a9 y \5 X/ t
- matrices: [mat],
2 [$ o8 u1 A$ u, V/ R7 ^ - texture: [400, 400],
( h5 R# M; b8 H; {6 c5 b1 E3 I - model: {1 {; Y/ W, [- u3 S% g) f
- renderType: "light",7 B5 j+ z, k( ^ o1 n- L* M" A
- size: [1, 1],# R+ A, o T" A& [
- uvSize: [1, 1]$ K+ W+ h0 n U( D& v8 \
- }
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- let f = new Face(info);6 u" p- |% {7 U+ W2 d
- state.f = f;
" F3 \; g: `( D
' @/ L. X. B* R9 O) _. X: Y- let t = f.texture;
$ L& }# V& u3 t/ @% t; x - let g = t.graphics;
1 h, ?* a' d8 N9 t# I - state.running = true;/ o9 M& I) l& P; t/ w' a: c8 z
- let fps = 24;
* |0 J! R# e8 g+ o - da(g);//绘制底图
7 W$ ?' W" b+ `- z - t.upload();
+ c8 p; w" f# ` - let k = 0;/ W' s. \* O1 `5 ^, H' T
- let ti = Date.now();2 ?8 V: g. q1 i& t
- let rt = 0;/ R2 Y, w2 o5 c u
- smooth = (k, v) => {// 平滑变化1 [1 G1 D- A0 E/ i( ~
- if (v > k) return k;
, ]% y, _" g6 {9 { - if (k < 0) return 0;
4 w! n4 f- j$ m+ O" O4 D - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 S5 a0 I0 `5 T% X) w3 p" M' b
- }
& _- ~9 y. ~/ i) |7 X - run = () => {// 新线程# F3 G$ S5 a8 i
- let id = Thread.currentThread().getId();
4 B8 ^) `# T+ R& v - print("Thread start:" + id);
% `. `7 A `* W2 M - while (state.running) {
) w( p4 S5 l" \) U8 E" i - try {
) {- o+ _2 X1 e* X3 d( x- |7 ^ - k += (Date.now() - ti) / 1000 * 0.2;8 S$ {3 j1 D* V* V# W4 O. {" m2 a
- ti = Date.now();
8 b I; j2 O2 H# r: y' I5 a' c - if (k > 1.5) {
5 G/ E: P) b; n% c9 G. t q& m& e; G - k = 0;1 |4 _5 [3 s8 ?/ [: {" @- |5 J
- }& e7 C) |1 J1 q% H6 Z
- setComp(g, 1);( V7 }. u& C& r$ r. j5 Z
- da(g);7 @" q6 O& ]& T% `
- let kk = smooth(1, k);//平滑切换透明度9 n) j" O3 F: z' j3 R# B1 Z! S* p
- setComp(g, kk);' G1 D. A. [4 c% D+ v
- db(g);
1 a# f" e" l! ~* d - t.upload();
- r4 N# a- g U$ A5 T- h( t - ctx.setDebugInfo("rt" ,Date.now() - ti);
- m# b) c" H4 i# W$ T: c - ctx.setDebugInfo("k", k);: ? W/ F. H( f) _& u! z, p
- ctx.setDebugInfo("sm", kk);, U* P" c9 N, g! `% _& q
- rt = Date.now() - ti;8 M" \- v! ]4 l! ]1 |( `) ~9 ^/ y
- Thread.sleep(ck(rt - 1000 / fps));; p/ l" N2 E; }% @ S9 n) s( z
- ctx.setDebugInfo("error", 0)6 \) U& O% x7 D5 m9 I ?& J# r
- } catch (e) {
) B5 m# e8 V9 P1 V6 C: R \ - ctx.setDebugInfo("error", e);# \0 {" S$ A* T) O- W8 c0 ?
- }& V0 n2 `+ ^4 w$ I3 r
- }
1 `& G1 \* a' S( \5 _- g9 ~ - print("Thread end:" + id);
$ C$ V8 N5 @3 I+ F& E - }
# a9 i* e0 H2 h - let th = new Thread(run, "qiehuan");
/ } {! g3 d2 S' D# {% W$ `* u - th.start();( b: B+ h! K+ z$ M0 P" i
- }, h7 ], }' J+ M
- * v. D3 |: g9 |4 j3 @, x
- function render(ctx, state, entity) {# ^5 [' p+ T" n- T% y% ]3 E5 d0 z5 N( Y B
- state.f.tick();" d4 A& _- t" z" y9 ?# J( e- V
- }
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- function dispose(ctx, state, entity) {
* a7 N( z$ g% j+ S. B# [ - print("Dispose");" O8 ^ o8 K6 L0 t" \
- state.running = false;
3 R4 o6 }* j* B - state.f.close();
0 _) L' O$ A3 Z2 h9 z% T - }
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# b: @3 I( u& a l" U7 ~- function setComp(g, value) {8 D# J" S& G/ M6 Y. Q2 p+ _
- g.setComposite(AlphaComposite.SrcOver.derive(value));2 @4 D& y, w* p" d
- }
复制代码 % e( K p1 W0 {3 H4 H
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。$ w2 [7 A `. _
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+ K _0 V$ ?& c9 S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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