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. k& {: f; F! p: _$ ]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。
( y$ _! a; K2 U) }4 S8 e4 R- t- importPackage (java.lang);
4 `: }, p- L# \. m - importPackage (java.awt);8 F, v$ j* _* W, v* X
- ( e9 c- u8 j, w4 a% X# w7 f
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 z R9 ?, s; v* m. x
- r- t3 r4 Y1 V- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: i; F- k( K9 o% g6 H
2 O- _7 c5 ~/ K) V- w4 f- function getW(str, font) {" j& `7 O- ?, ^# X
- let frc = Resources.getFontRenderContext();# ^' e# p- x. D6 @ u$ T G
- bounds = font.getStringBounds(str, frc);: ~( {0 D5 r& y a3 |, }
- return Math.ceil(bounds.getWidth());& ^0 N9 G5 [3 M
- }
: o: K* ]) v/ h
4 B. M, I @' A1 m( p- da = (g) => {//底图绘制
- B8 @, x* w9 J2 _ - g.setColor(Color.BLACK);. Z4 K4 _ S4 F' L5 a
- g.fillRect(0, 0, 400, 400);5 a1 i e$ c8 ^# ]0 H% _' x
- }) G9 S+ |" p: a( e
- 3 A) R Y% x7 p' v' R+ y- _
- db = (g) => {//上层绘制8 U/ `1 b3 f n% Q& ~# S
- g.setColor(Color.WHITE);
& t5 i% G$ P$ j8 \- j - g.fillRect(0, 0, 400, 400);
' C+ Q/ O" n) G6 E0 j: Z. v% c i, C - g.setColor(Color.RED);, ]7 K+ C6 P0 X& n3 W R L
- g.setFont(font0);
6 t4 M3 d1 l; d - let str = "晴纱是男娘";! ]8 |. z/ f, f& o( f6 S
- let ww = 400;4 M5 X2 y" g- O0 v1 N
- let w = getW(str, font0);0 k( V0 P& W. }$ U5 T
- g.drawString(str, ww / 2 - w / 2, 200);
# j6 F) E" } X! M; o1 q - }
8 v5 f: D% j' {5 S# K4 J
6 E, L' p! T5 @% r# z- const mat = new Matrices();
6 p: p& }- u: V+ _8 \& v: c9 Q - mat.translate(0, 0.5, 0);: }$ Y3 D H n' X5 e- N0 n9 v
7 C- T) B" r7 U n3 c5 H- function create(ctx, state, entity) {* ^) d1 ?! J# j% l8 g- ~# S1 e, r( L
- let info = {
% W! ?+ N% i; n4 U6 n' m - ctx: ctx,
* d& T9 r4 j' b! a/ H) |$ y - isTrain: false,
! i) G K# M) ~4 C" r- }/ K* N1 p+ O - matrices: [mat],9 T8 s. C& s# O% r
- texture: [400, 400], G/ d/ M* k3 e& e
- model: {6 `( O8 T6 O$ n( x* A6 X1 ~
- renderType: "light",: l! c/ c2 O- r/ N V- g
- size: [1, 1],
5 G. G. v6 A( Z. a ? - uvSize: [1, 1]
) M h# \' Y, R7 E: T, d; }+ v3 I* p - }% {" ?1 e7 B; h9 @1 J, P9 l( k
- }
4 @6 g( b( {5 O* H! X0 ^: N - let f = new Face(info);; p, d* v" e! K, W# ?) k7 f* R
- state.f = f;5 r$ L1 V& A" j9 k' ^; G* e0 y# @
- 0 U8 ]+ [. u3 p
- let t = f.texture;6 T& }+ x( v7 C6 v% t2 O# [
- let g = t.graphics;; K7 [# U# @. ]# ^# f4 c/ q
- state.running = true;- I1 P* S1 L8 c, ?! u5 \% v1 p5 X5 B5 C
- let fps = 24; G y2 @5 G2 b" @: o' v
- da(g);//绘制底图1 V0 k, J/ V. j0 d
- t.upload();
0 B/ t% D0 B) G& f - let k = 0;. Q# @ O$ F8 ]6 p
- let ti = Date.now();
+ ^+ Q% P Y) s* {& k7 s2 T - let rt = 0;6 L1 R/ o! A6 u9 j O( g, I- y |
- smooth = (k, v) => {// 平滑变化. T' q- U: ~0 x2 z) m. j
- if (v > k) return k;
/ U5 a" L) ` q% {. ^+ {' E$ @' X - if (k < 0) return 0;
( f; W' b: N) @1 H& v0 k9 l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 w$ T5 K; M4 d3 L - }/ K! T/ m+ P- P! O8 R
- run = () => {// 新线程1 D5 ~( {, U/ h' y
- let id = Thread.currentThread().getId();, z0 o9 |, E: I: w+ u
- print("Thread start:" + id);
3 [+ D+ b6 i% A/ A - while (state.running) { P( |, J' _! s2 F
- try {3 U9 |6 W; w+ d. z1 j0 ]
- k += (Date.now() - ti) / 1000 * 0.2;
6 D" K* L1 X, O. L - ti = Date.now();
2 M8 V+ f8 D" y" j* X1 v8 j7 i. p. x - if (k > 1.5) {
6 P7 Q; T$ u, s" K# A - k = 0;9 Y- S/ T6 ]1 {/ w Q
- }
# }1 b4 g3 f9 A - setComp(g, 1);( k5 y! Q! v, ]* ]9 R+ [& r
- da(g);! z' I, I3 j6 ?% t
- let kk = smooth(1, k);//平滑切换透明度' \1 B5 M" h8 E% H- A
- setComp(g, kk);5 l [4 N' e' S7 r" [! N0 v
- db(g);. i" q$ C" \( I* w" p, E: f N
- t.upload();% J5 @: g5 g0 T+ J
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 M9 c6 o# B! C6 s' u4 O
- ctx.setDebugInfo("k", k);' m8 K" K# Y8 @& E: s3 E5 _, K
- ctx.setDebugInfo("sm", kk);) K% K3 _: H9 V
- rt = Date.now() - ti;
( v1 F# F, D, Z% a8 H, }9 k, n - Thread.sleep(ck(rt - 1000 / fps));+ U5 S8 o0 t* H) m$ R( G
- ctx.setDebugInfo("error", 0)
1 F* P' c+ f/ U6 b# C$ n+ x$ H/ e w v - } catch (e) {
% _% ^5 n/ a4 s5 z$ S" h7 } - ctx.setDebugInfo("error", e);
% H3 m$ {+ R9 Y Y, r - } o3 w" c. z6 q3 l& u5 V/ N% ~
- }4 t% o7 `4 g; ]' p+ r ?
- print("Thread end:" + id);
y5 k6 @- c# P7 l! { - }8 }7 ~: p* D; M( e) e! K& ]8 j
- let th = new Thread(run, "qiehuan");1 P4 w% V+ y$ {, m0 G) S
- th.start();
4 [2 t- u% G2 p3 f! }/ p - }
+ l' `, n6 J# y% ]% h - : v( v$ i. n3 s" j$ R; \! o
- function render(ctx, state, entity) {
- X% [5 g( ~$ N) Y3 O, F - state.f.tick();+ y! m) t6 n$ T$ T& j
- }
$ F3 e4 m# Y% G) g: H2 Y# I5 G
- _) ?: R6 Q5 g: [7 U- function dispose(ctx, state, entity) {
) b0 l; S4 D9 e; Q7 a) h1 w1 M9 _ - print("Dispose");
) r' Z- P i) I! v$ X& S. v8 k - state.running = false;
1 E: M8 M; ^2 K8 G( O# p - state.f.close();7 H# @8 a |# w( w# p
- }
! ?1 Q3 b" K1 R
s% n- E9 W% c2 }/ [, H. T+ k- function setComp(g, value) {
( ^$ p* O5 k* c) s" K - g.setComposite(AlphaComposite.SrcOver.derive(value));/ K' q& D- z$ ^- x/ ^ r
- }
复制代码 0 q: M( f5 Q2 \3 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。9 J) J1 Z+ B( D) o
5 J4 G6 \, b( e* l
3 Y; Q7 L3 M. [: e6 g4 v9 n; d
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)2 S: [' ?/ Z4 i& U% W: }
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