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3 F: m' C& I; O. ?; h7 ?* g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。
- Q. X* }/ S* G U5 h- importPackage (java.lang);
7 _; O% g& C0 ~0 F5 E4 @4 T$ Y5 P - importPackage (java.awt);
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. \( z5 B" x$ O- N' N$ D, q( R- include(Resources.id("mtrsteamloco:library/code/face.js"));
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8 e/ {+ ^4 A. V8 o( e L1 S* j& |7 _3 l- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. w# m+ J; O4 T5 {$ v9 M; i
' @: l& m2 y4 K( f- function getW(str, font) {8 I# U9 H3 }2 K
- let frc = Resources.getFontRenderContext();2 p: j2 e/ ^+ k1 D" R: g2 s
- bounds = font.getStringBounds(str, frc);" a* O n0 H2 e! K. d3 n3 r: R W
- return Math.ceil(bounds.getWidth()); u2 m& r8 ]/ U8 J% y7 b
- }
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; d2 w/ y, a' T2 ^* ]% x- da = (g) => {//底图绘制
( C, @6 |( `( C b - g.setColor(Color.BLACK);
+ [; a; n# {- [' \% {9 A7 W - g.fillRect(0, 0, 400, 400);, A# {; I- q N* ?! D4 r n
- }7 i; c& G$ s& w' a
- v4 M; \3 f a2 y3 q2 J- db = (g) => {//上层绘制! e6 |, d* I* z. O, z
- g.setColor(Color.WHITE);3 N0 y; I- v9 o
- g.fillRect(0, 0, 400, 400);
$ H0 d% d5 y g& @, ]3 V7 K - g.setColor(Color.RED);
# }; I3 |, {/ k6 I& `+ r. ]1 i - g.setFont(font0);: v' M4 c- d3 t% R& p0 p
- let str = "晴纱是男娘";
* c, A' K9 k- @ [0 B. z) K - let ww = 400;* A8 h$ F3 ~6 J
- let w = getW(str, font0);
2 J, I3 |) n/ T& J& v - g.drawString(str, ww / 2 - w / 2, 200);7 j% _ @' U b
- }
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6 K/ ~$ e6 [% d& K- ]6 N- const mat = new Matrices();4 M5 r+ l) b9 h8 ?6 k# W2 D; |0 V
- mat.translate(0, 0.5, 0);9 ~0 N1 l4 v8 t% U
- 3 W" e/ w7 M. h" |) Y; l0 F
- function create(ctx, state, entity) {" P4 {, Z; ]: e3 _3 t* ]/ G% l7 W* H
- let info = {
S6 H: k8 Y3 X# [6 }& g- u - ctx: ctx,
) E1 e0 j8 E; y* ?% k: B/ G3 i - isTrain: false,/ b+ y+ f3 Z2 N7 f
- matrices: [mat],
# S; [* R a/ ~* L- i) z - texture: [400, 400],$ K& \! W+ {" D& W; f
- model: {
; d& N( B( p9 U' o - renderType: "light",
: b7 Q2 z% F& p - size: [1, 1],
% i+ S& [; ^2 t- o8 I+ h - uvSize: [1, 1]
9 t$ N+ S% C k0 Q$ h0 q - }
/ e$ {9 P" a' F( w3 \ - }
( _" @5 C- R& E' s" P: x6 h - let f = new Face(info);) u$ h j0 O! a9 G1 S+ A. x
- state.f = f;! z4 Z( ]. _( C
8 O# p) O; i& `, u3 s Y1 r- let t = f.texture;% U2 C" }/ Q3 f4 j% u" M) `
- let g = t.graphics;
7 |1 r6 ]" _ x- q7 q0 t - state.running = true;+ H" v' F; n* W2 `! \
- let fps = 24;2 [- X0 F8 { g% o( R
- da(g);//绘制底图
& ~) x' A9 C) b; N# a - t.upload();% f) c. r. {7 C5 a& e: w
- let k = 0;
* f0 X! }% C. [' d1 Q) v - let ti = Date.now();8 s# Y6 e, o( ~: K3 K" u$ q o* D
- let rt = 0;
: W& e! ]: H1 T - smooth = (k, v) => {// 平滑变化
% I7 f: p7 B' f* r8 u2 F; x - if (v > k) return k;
/ g# w5 b) y9 o& [: j2 L - if (k < 0) return 0;% ^4 W! o7 n* x9 J$ ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: c* o& p9 d, @! K- i# l! F
- }
: i8 q, V% n M+ N- q5 z$ H - run = () => {// 新线程% x; p9 L/ n' U( a& n* Y1 j+ B9 e
- let id = Thread.currentThread().getId();
4 `+ c* l- k" `9 \$ u4 U - print("Thread start:" + id);0 i0 _2 @9 Q. B$ a4 C
- while (state.running) {
4 O0 b: _1 _3 m' [4 \4 Z+ g - try {
) E2 n; G0 \* I - k += (Date.now() - ti) / 1000 * 0.2;3 Z, d F+ o4 V3 ?: F. f, J- w
- ti = Date.now();
6 h5 l) H: z1 u0 i - if (k > 1.5) {, s# E4 H* B0 c7 C# t$ K% K
- k = 0;
* q. Z& x( q/ w! {4 o - }
$ d' b. F, Y, @% }* J/ |3 `: T, O - setComp(g, 1);+ x& s3 c/ d/ x5 O/ F% E7 v
- da(g);
' n+ |2 D/ d6 {# t* ?7 A - let kk = smooth(1, k);//平滑切换透明度* I( ~8 t" C" ^7 u
- setComp(g, kk);
$ |2 u$ G; W" L/ e0 k! K( n - db(g);0 T' {) U6 [# L) \; `
- t.upload();
' M, D9 h8 W0 J& o: b1 Z - ctx.setDebugInfo("rt" ,Date.now() - ti);
" E4 J2 y3 S7 V v' O - ctx.setDebugInfo("k", k);
" C5 G, v/ V' c - ctx.setDebugInfo("sm", kk);3 {" R# {. s) M) N8 [5 | s
- rt = Date.now() - ti;
) l- u1 }. {+ Z3 ]& T9 b - Thread.sleep(ck(rt - 1000 / fps));; m' l) h, B) P/ |' u& f( ]
- ctx.setDebugInfo("error", 0)
" l% C# o/ Y9 l, C" o - } catch (e) {
6 P3 F& w% x* ?5 A( \3 @* j X5 l - ctx.setDebugInfo("error", e);
* D1 H5 k0 t) y* O - }
0 f$ P8 h, f- }+ u: `" F - }
k1 G8 ?2 N0 B+ \* z6 O8 E - print("Thread end:" + id);; O/ o! y8 V% D2 u/ \4 P3 s
- }* j* E) B5 @" x# V
- let th = new Thread(run, "qiehuan");
5 L0 y, {7 f3 I4 H - th.start();
7 q( z i% W! E) e1 { N - }
2 Y6 I% F/ i. m2 i, g7 b. B, i - ; m s8 `+ I+ o8 |4 O- I; G
- function render(ctx, state, entity) {
; }1 i7 `3 I9 X9 w# E% ~ - state.f.tick();- G$ H8 y* p7 Z3 B: S' Z; h$ d2 V, N
- }
- `( B% ~7 f: a% s1 U1 u0 i4 y - & y8 _1 I2 k7 L7 O
- function dispose(ctx, state, entity) {
$ i1 X+ g7 Q$ }# `! Z - print("Dispose");: W0 L; b" E6 ^# d8 A
- state.running = false;# p3 K. t& v1 e6 V$ v9 A
- state.f.close();
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- # E0 B! m2 v# ?+ u5 a
- function setComp(g, value) {+ u( i; m0 t: D( I+ X
- g.setComposite(AlphaComposite.SrcOver.derive(value));
l) B& u6 G: Y. b3 O9 A2 l9 G% l - }
复制代码 4 m4 S( x+ m+ T8 O5 C% X9 ^
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)7 F2 i7 X( }6 G; L4 Q8 {
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