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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。0 I4 X5 L, f$ D+ t1 g
- importPackage (java.lang);
9 d4 {) y0 ~& {# t - importPackage (java.awt);4 K& e) U5 r. c
# B4 o6 ]9 n7 Y7 Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
" @8 [1 p$ f0 E L$ A% }
, a- l( w G" h6 g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
% n, f- u) U% F1 r9 h - let frc = Resources.getFontRenderContext();
0 _6 |; L( r$ q; Y/ r" o - bounds = font.getStringBounds(str, frc);
8 J3 a0 a ]8 R - return Math.ceil(bounds.getWidth());0 e5 ]! ]2 v( \0 |
- }, N! P) @* A' r) ~6 H- s" y% A) I; m
- 1 {$ Q( ]) `6 [1 t) y/ o7 q' q
- da = (g) => {//底图绘制
) g' N8 d# L# `% o, k% ` - g.setColor(Color.BLACK);
% j& D3 K r0 L- `6 ]8 o% v7 v - g.fillRect(0, 0, 400, 400);
8 Y4 P8 C& g$ {$ r) z, ^: I; c. z( a8 K - }
. J; @, R$ B# }7 a0 x- r( ? - 9 O4 d) B+ y u
- db = (g) => {//上层绘制3 n8 e! b9 [) b& k& _& {
- g.setColor(Color.WHITE);
0 ?) r A6 h6 T+ V - g.fillRect(0, 0, 400, 400);
) G; u% o0 d0 c9 Z' T - g.setColor(Color.RED);3 r# v0 H( W- E2 P" o" S
- g.setFont(font0);
7 w) r9 g3 d, Q' Z" f; _ - let str = "晴纱是男娘";
) ~8 q3 F/ o4 T( U! p9 m2 ]" C - let ww = 400;# ?" i5 C* g; V: J$ V) P9 R
- let w = getW(str, font0);3 a* X8 Y- |) N# F& R5 F$ T1 o
- g.drawString(str, ww / 2 - w / 2, 200);: [7 Q0 j4 G1 H }: n; u. }& x
- }% W% N8 o* b- F
- y; o3 x* f8 h7 b0 y5 R. b: T" }
- const mat = new Matrices();
Z' \9 Z9 q2 E; S& j0 ? - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {( W; s0 d) M/ b. C6 T
- let info = {
5 x7 Z: K, w: k' S4 M+ ]' E9 x - ctx: ctx,
& p2 K1 s1 @6 @1 r& T - isTrain: false,
4 N8 q& B0 d" Z& C - matrices: [mat],
6 \3 Z% f( w+ @6 U: ]5 j - texture: [400, 400],; i5 P2 P+ s f; F. I6 G
- model: {
4 Q, S3 Z$ ?% ~ - renderType: "light",1 S4 V# s; l* X( M
- size: [1, 1],
1 ~8 ?7 W) u7 C5 U2 @! m - uvSize: [1, 1]1 b2 Y: ]6 p- b8 D; l
- }1 U( D3 q% w0 @- ^
- } q% V. p6 c) M4 N2 z$ j
- let f = new Face(info);+ r+ Z5 `3 h0 a o! @% i, \
- state.f = f;! U6 n. U w' O7 d# d; j. O/ Y. O
- f0 t3 x9 I; N7 K( h
- let t = f.texture;' F$ r9 B+ T9 m2 {' S) q* c
- let g = t.graphics;- J) `" X F' t4 i: W4 w
- state.running = true;+ X* W8 x3 g V
- let fps = 24;
" m A; K. G( C - da(g);//绘制底图
" l' C$ W# |+ [7 G4 R6 U& t" l - t.upload();+ T" a- T" C n
- let k = 0;. S: l6 u9 B( u7 f6 c& M5 \% s
- let ti = Date.now();
$ u4 y. ~7 [9 x - let rt = 0;- O ^) a. z3 b% n3 y$ H
- smooth = (k, v) => {// 平滑变化7 z: u1 c9 S9 G- u
- if (v > k) return k;
' v) z" F* G; [7 {5 J+ K - if (k < 0) return 0;
' n$ Y1 T1 W) X0 f0 d5 v/ U - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, k+ V Q4 q/ ]0 Q3 g, e( _( L% I - }
2 ~% Z- t2 F2 ]" U0 }0 S - run = () => {// 新线程
9 x* y9 u0 D( v, D5 E4 d% T - let id = Thread.currentThread().getId();
1 Y- o( l8 G l1 s; q+ H0 y - print("Thread start:" + id);
, V* @5 ~" {- c& m9 _0 ?! q, F1 h - while (state.running) {: K# B/ b/ o/ `3 ~. W: ~! L
- try { r1 M/ e1 N3 b' T0 @4 L
- k += (Date.now() - ti) / 1000 * 0.2;7 _& y# m3 H+ z: x9 U9 K
- ti = Date.now();
- S3 d" ]$ g# P2 M3 c- z! r5 f - if (k > 1.5) {5 m8 ~, V3 ~! L2 F) Z
- k = 0;
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- setComp(g, 1);# S9 p. K' V; K
- da(g);
( ]4 @% n3 Q$ P/ d+ h! [; r - let kk = smooth(1, k);//平滑切换透明度7 s5 e" w: J/ k9 i
- setComp(g, kk);
7 y! e; k, M3 M2 Q, n - db(g);
5 W R1 k! R" D8 Q - t.upload();3 b% j9 ]. |2 R
- ctx.setDebugInfo("rt" ,Date.now() - ti);+ w/ k7 }6 [/ ]9 \0 L8 Q
- ctx.setDebugInfo("k", k);7 \" `+ n+ C1 C! |
- ctx.setDebugInfo("sm", kk);
/ N2 k/ u7 G! I+ i - rt = Date.now() - ti;( Y1 k) m2 o! @, b; E0 O: X' ~
- Thread.sleep(ck(rt - 1000 / fps));% g- S. g4 P3 T( Q
- ctx.setDebugInfo("error", 0)
6 o9 J9 j0 c& k: K - } catch (e) {# {0 ] u3 s& ]& h. m' A O |
- ctx.setDebugInfo("error", e);9 G5 T$ ^" v- u& i; K8 F/ v2 j
- }6 T8 i- {0 n1 j8 z
- }
8 J& h; y w) T2 ]$ q9 w W - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
! Z# i( j" @" k - th.start();) P' c. g' w3 d% Y( ^/ U
- }4 u0 F2 g1 O: t+ ?4 L
5 M( _$ i, h5 e4 i# B& w- function render(ctx, state, entity) {
# Q, U' [) U1 l% v! b - state.f.tick();
1 `: v" c E/ P* a6 c - }6 V6 J9 k& Y* v! J* c5 K% ~
- 8 Y+ v3 p# g; N
- function dispose(ctx, state, entity) {
9 G# e5 Z1 L' {) E) } - print("Dispose");
. O* v4 l6 x2 m - state.running = false;
% l7 Q+ x' u) \+ N+ { - state.f.close();
1 y# Y% i4 j/ d9 r1 M q) ^9 X8 O - }
: H$ i3 y8 ~3 e4 e- A: Q0 k - / i+ \1 `, o& D- ^
- function setComp(g, value) {: x1 G3 l# `( j7 L* Q4 w [
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 r+ u- K2 k7 |& T+ D2 H - }
复制代码 0 |3 S& J% v2 [& o- 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。
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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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