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5 S) v2 X( |* _* S: p# Z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。1 ^7 e4 B$ U( Y6 S
- importPackage (java.lang);& w6 W8 u; o6 I$ ?% X( M
- importPackage (java.awt);) W8 H8 ~# `) P* V. S* O" R
& ?7 |! z: o: [. z& u8 |( K& i% J- include(Resources.id("mtrsteamloco:library/code/face.js"));" X# W) ~; O9 x, `' D* I/ A a
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, T! }( m. r6 g) b2 e
- / i% j9 M+ l) L5 _, _- U8 s
- function getW(str, font) {! c% H5 d5 l# P( }1 r& Q- [
- let frc = Resources.getFontRenderContext();) u3 O" n( ^+ [- \- w! p
- bounds = font.getStringBounds(str, frc);* s; l2 j# [" ^
- return Math.ceil(bounds.getWidth());% O6 S2 D0 }# T }* I
- }1 r& R: ~ G. ?% @
- / ~+ h0 K* y" z0 l
- da = (g) => {//底图绘制
+ P4 q' W8 F2 S! y0 w, a - g.setColor(Color.BLACK);& g+ L7 q; C, o+ H% v: w1 b
- g.fillRect(0, 0, 400, 400);
4 ]7 P) Q( D0 V# V) O - }
- C/ x$ s- F) d! j7 r6 A; E - 8 @, b7 t, D6 A$ H5 j" P
- db = (g) => {//上层绘制' O# q2 r! }( P, X
- g.setColor(Color.WHITE);
- q0 `* A4 O) F- O+ R' l, W! p - g.fillRect(0, 0, 400, 400);
6 _$ a. Y7 b; ]" G% U - g.setColor(Color.RED);
8 N/ [0 x8 v% M# o" E+ A - g.setFont(font0);7 d. v; C5 f$ m! a
- let str = "晴纱是男娘";
0 X- V/ f0 W, r/ j9 Z. _& @* g - let ww = 400;; v/ [9 Q) E* I) m. p+ _+ F
- let w = getW(str, font0);
2 E7 ]3 n' c9 p9 W; b - g.drawString(str, ww / 2 - w / 2, 200);
" `$ \6 h: K5 _/ t0 A) t - }
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- const mat = new Matrices();% f& S; u7 I* x6 r& G
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
F' D, a0 n, _( |) a. ?% L - let info = { x7 T- U3 K6 ]3 u3 h& o& z
- ctx: ctx,) k: T! o" ]6 W
- isTrain: false,
( o$ h0 m1 t) ^0 ~0 Z$ M - matrices: [mat],# H* _7 _2 ~! H) `
- texture: [400, 400],4 z+ K5 a* F8 a, v1 p A# a
- model: {* q' v2 p, l" O a6 I
- renderType: "light",# E# o9 i) C1 [5 q) {" O" H) E' N
- size: [1, 1],/ o9 v/ R e& K9 W$ p9 q& u
- uvSize: [1, 1]
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- }) e! G4 H7 [7 Y$ O: J
- let f = new Face(info);
& @$ y+ A& f& ~ - state.f = f;6 H p8 _5 w$ k4 u4 _
1 l9 _% P( |8 B: J- let t = f.texture;: T1 ^! F i/ b2 @, q) O
- let g = t.graphics;
V, d! {( V( C" l9 M - state.running = true;
5 `! a7 q. A1 }& I1 m" { - let fps = 24;
7 M. R# w5 B4 e" } c M - da(g);//绘制底图& _4 J- R8 A/ Z" q' G& m0 K! X
- t.upload();% b4 `' C% h$ o1 T1 w8 j9 E
- let k = 0;6 Q+ _2 e6 Z$ P+ r1 k0 \
- let ti = Date.now();: ]4 f Z+ g4 i ~
- let rt = 0;' g/ s4 Y$ X6 h/ P; V
- smooth = (k, v) => {// 平滑变化3 X" J* J2 v2 W# m' d
- if (v > k) return k;
, T4 _. t6 [- w! K2 e' ] - if (k < 0) return 0;: f9 ~8 ?7 ^9 `2 [
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% r& G9 n" k% G; X' n - }, t3 A) G8 f4 g3 @( v. `5 |& `
- run = () => {// 新线程
9 D9 O' O2 X1 x6 @ - let id = Thread.currentThread().getId();/ j) R }: Y7 `' P3 l0 S( R* v
- print("Thread start:" + id);
, K) j8 h% I/ }, ?+ O - while (state.running) {
8 w7 G5 W# {% m! ?7 d* [! g' L! g - try {
) `, L- G$ j9 q- ]- X2 X - k += (Date.now() - ti) / 1000 * 0.2;
& c" J( D3 I j5 @0 N - ti = Date.now();
# B1 h1 i# ^5 h4 L/ t8 T - if (k > 1.5) {/ R% @7 B7 k1 b$ v: |
- k = 0;
w, ?+ _$ H. A- A2 W6 u - }7 i1 T9 d* x. C1 h; Q
- setComp(g, 1);
; J7 T0 T0 A: e0 _5 @* e - da(g);
" |% i# g( a( L4 p( S4 ^# A - let kk = smooth(1, k);//平滑切换透明度 v3 {5 U: l$ T% k
- setComp(g, kk);
' ~% v+ D3 Z+ d/ ?9 v2 Y - db(g);3 B4 v2 r, Q! |! ?6 \
- t.upload();5 d% R: \; k! T
- ctx.setDebugInfo("rt" ,Date.now() - ti);
, e0 i J+ k# @ - ctx.setDebugInfo("k", k);
9 R+ G0 I( e; X! o - ctx.setDebugInfo("sm", kk);
$ U7 o2 I9 x, Q2 n) k+ _$ Y. w - rt = Date.now() - ti;$ E- l- U9 Q$ |: M, ~9 \
- Thread.sleep(ck(rt - 1000 / fps));
/ z) V8 i% r( u. w7 ]( a! T1 i - ctx.setDebugInfo("error", 0)0 X! X6 a4 W* b' |) R
- } catch (e) {& j$ ]' i9 m6 ?' }/ U
- ctx.setDebugInfo("error", e);2 X" ^, J$ S3 g9 _' t! I
- }9 P, Z6 F+ J' Q `- Y
- }
+ S! b" b# a9 M! Q% u% E7 Y - print("Thread end:" + id);
/ I' a$ G: ?/ R# |% P1 [% Y5 Y5 g - }. t" U. g! b- {9 Q+ S
- let th = new Thread(run, "qiehuan");' N( v; o+ @" j. M4 t# X' D
- th.start();
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- 8 d+ E6 B+ S% {" U: m
- function render(ctx, state, entity) {
% R" @* v& @5 c7 o - state.f.tick();4 j1 O, X" {7 T( L/ ?
- }
) T4 Z1 f+ \+ Q3 S5 H# V9 ` - . s. U- q# ]9 b7 }0 v
- function dispose(ctx, state, entity) {
I- h# ^7 `) e8 U% Y. ? - print("Dispose");/ P2 @( K1 f7 H- D) I$ {( u; m
- state.running = false;7 c& }' r9 L' t9 f4 Z
- state.f.close();
/ ^7 r/ X1 q2 F" P7 b9 A z6 o: b - }' P5 [: k& N2 P U, O6 A' Z
- 1 R! N. g" x/ n! }
- function setComp(g, value) {
: R; s+ ~: d2 a" x1 ^# c - g.setComposite(AlphaComposite.SrcOver.derive(value));
% S; `- Y) {* x- |$ R - }
复制代码 4 U2 l* m& S7 h) m" ~$ u6 s
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。: h* I+ W6 } n6 J" j
6 ^5 r4 _/ r0 Q5 v
: g' ^/ d4 R1 t h( U2 F$ m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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