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2 K$ ?! ]4 F$ m: _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。) |6 r$ c- Y* G' t) D$ x x0 S8 r( [
- importPackage (java.lang);; I. W! B# U j& ?
- importPackage (java.awt);( L- y# {! A% E8 h
4 w4 [1 F+ c5 Q( M- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 E: z9 g( A1 e: t. `- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
, G/ C: A8 h/ C q. Y6 f! ^ - : Z: `2 S. h8 a! v7 u( ~
- function getW(str, font) {
% i: Z/ n) e2 A- } - let frc = Resources.getFontRenderContext();- K7 v* ?, w5 a5 c, {! K
- bounds = font.getStringBounds(str, frc);; j$ H# i( n6 q; b5 o( Y
- return Math.ceil(bounds.getWidth());; n/ V2 f9 g2 K7 T' v
- }
; `4 O( A+ D8 M' `& e& h
8 }8 G% D1 S. T7 J" v0 b& K' V( v- da = (g) => {//底图绘制
' u7 F& u! u3 C, w) F9 a! T - g.setColor(Color.BLACK);
) |9 G+ L4 o" |5 f - g.fillRect(0, 0, 400, 400);+ h4 b0 \) R& P* _/ W% I# U
- }1 S: L0 y- p+ u
( j+ J! i$ B# E- db = (g) => {//上层绘制& B9 n* Q, ]0 D3 G7 b
- g.setColor(Color.WHITE);
2 p" P( }. \6 ^! n# {6 O* c4 R2 X: ~ - g.fillRect(0, 0, 400, 400);
) B# x0 U1 `2 ?$ ~8 C4 u d7 ` - g.setColor(Color.RED);* S3 v7 w: ~8 _/ [7 l; i
- g.setFont(font0);
! w# h* H& G. ~+ ~+ A) S - let str = "晴纱是男娘";
+ e$ v4 u9 N' E% {$ S - let ww = 400;
. m+ d/ E3 z% u8 U2 ` - let w = getW(str, font0);
' Y0 k3 ]: w8 C. Y% ^4 g% q7 ?( s - g.drawString(str, ww / 2 - w / 2, 200);
) b9 T: G# E( M; X' \ - }
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( ^1 }, v4 |- `, ^8 ]) B- const mat = new Matrices();) t/ F- Y6 J; l7 i0 i
- mat.translate(0, 0.5, 0);
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N6 W3 X$ k7 q3 i& ]1 S- function create(ctx, state, entity) {2 ~/ B- Q8 v5 D$ r0 _6 u9 _
- let info = {
8 s$ `$ c+ @# B" e: j8 R - ctx: ctx,
/ O" @0 b5 N+ s% g - isTrain: false,/ u0 R# S4 R% o9 W! W; p
- matrices: [mat],$ c* ]5 b% J; O6 R/ D" D
- texture: [400, 400],; P7 y. X: r7 |
- model: {
0 s9 z$ z- h. K; }7 b" z9 Y) E - renderType: "light",
6 d: T/ L+ w, z- X4 T - size: [1, 1],
3 h- R% N$ K5 i8 @2 E k& f7 @2 { - uvSize: [1, 1]
6 `% F+ @+ D" S& j# h - }* I" j" v& f" [
- }6 k1 W, j' o5 k' Z2 h: P8 Z
- let f = new Face(info);$ o/ }. `* } Z/ G* V
- state.f = f;! {. b8 `; R0 y, u/ b- c
- % A/ \) ]% p# D% ?. {
- let t = f.texture;
8 e, W! D$ A) n! |" Q0 P - let g = t.graphics;" c5 ~1 p3 d, |' N- c2 `) g
- state.running = true;
6 z6 h9 k+ C( E2 N& r0 | - let fps = 24;
( _9 `6 S( B, A3 ` - da(g);//绘制底图2 D( M$ x: D' O1 V
- t.upload();; N4 _% V; x6 {. |( B: z2 B0 B& v
- let k = 0;
6 M4 k, @! G) h- [+ f - let ti = Date.now();. X! n, t: ~$ i
- let rt = 0;3 k& u8 M9 t5 M/ F
- smooth = (k, v) => {// 平滑变化) j+ A& E" a5 {. H
- if (v > k) return k;! _+ o1 m% ~2 m, y/ n! ~- z( h4 H
- if (k < 0) return 0;
8 `/ f( K& z+ z2 w- G W$ j - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ I! u1 H! ^, ]1 y+ ?
- }
. c& s7 H! k% t1 f; | - run = () => {// 新线程
9 H: k. X. }4 j* v4 A, D - let id = Thread.currentThread().getId();
( ]5 |% ~% B% q* ] - print("Thread start:" + id);' F3 M: f! l' Z! }& K' x# R
- while (state.running) {
: M# e) J$ _6 y9 W, d& c7 ~% g - try {
5 T6 I1 r/ @9 I7 b7 w2 Q; @ - k += (Date.now() - ti) / 1000 * 0.2;
6 h+ u* G2 x! `7 L3 y - ti = Date.now();
8 k( {6 o* |1 k% T# F - if (k > 1.5) {2 ~# W3 ~& A; r, U! O
- k = 0;7 i. v; @* }$ ~8 q
- }
6 c) o: L+ ^& d R! C- u- O - setComp(g, 1);
$ o1 p. e- q& w5 O, V - da(g);
0 ~! W# F: l5 S! q" H - let kk = smooth(1, k);//平滑切换透明度
6 Q( w( P9 [' D4 I+ T$ ? - setComp(g, kk);
) G& _/ x" f0 E1 z* q' y - db(g);
* Y& Y8 O' k1 S' r& b - t.upload();
* L7 }( Q2 S8 D - ctx.setDebugInfo("rt" ,Date.now() - ti);
. w3 u- P1 G, t* i - ctx.setDebugInfo("k", k);
: `2 l% q4 ]! J2 B% A. g - ctx.setDebugInfo("sm", kk);
+ \- ~/ B9 ]6 `( } Y$ @ - rt = Date.now() - ti;# V; H5 q1 e1 ~6 a! v
- Thread.sleep(ck(rt - 1000 / fps));* o- U0 ^3 P& d
- ctx.setDebugInfo("error", 0)
! W& B% u( m! |$ X - } catch (e) {
1 l- X; K$ D- M" z1 f3 ? - ctx.setDebugInfo("error", e);
+ `2 w# k, S: X1 s - }
! @, D3 T& B( A9 U' W- p Q( S - }
8 _, c4 c7 t1 N$ D" z [ - print("Thread end:" + id);
- u2 B5 ?- S: C - }
# P! b) i( j! i% R4 h3 M$ l9 c - let th = new Thread(run, "qiehuan");
* E: R+ g3 d2 ] - th.start();
0 ^$ @6 L) `& m+ U/ q - }; B4 z# u- q X4 v
- ' F, [/ p$ q' f1 [/ R* t
- function render(ctx, state, entity) {
( l0 D2 K$ d; \: U5 \ - state.f.tick();
# ?) [& y7 d2 Z& N, ` - }* a% ?: |8 b4 M5 I0 {+ v
+ z( N5 a! S! g( n$ z- function dispose(ctx, state, entity) {* W3 V: t9 V2 p! N( F3 E
- print("Dispose");' T& L* R( z/ q) l1 b. X7 |& k0 y
- state.running = false;
% \' s& B: {2 I6 L/ Y( k2 X7 s- T - state.f.close();4 t( U4 r. P3 Q/ e" |' c
- }6 H7 V4 [4 Z$ o/ l! l
+ O5 l# W4 P7 ^ V- r& p- function setComp(g, value) {1 {) B1 U9 [' T6 ^
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 \' p' g) k& Q+ Q( w/ i% r
- }
复制代码 / l: V$ J' d* M0 ^6 c
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。, T. Q; g5 f, [
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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)' u {) p8 h E7 Y7 X# d7 V i
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