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& S4 X2 C6 `$ \/ z. B8 V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。
5 y5 [- O- W; }- }- C- importPackage (java.lang);1 J% }: e% ~6 T- V1 V2 J
- importPackage (java.awt);: i+ y# R3 g, t; e& p
- ! b" R, ]! z* }2 B
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 d; T$ t/ c$ h) @+ F8 D+ B
- - m* F5 M/ S5 D) |$ a# Y, C
- function getW(str, font) {
% Q! I# v$ Z- D$ L - let frc = Resources.getFontRenderContext();$ y' e# I5 \% f4 C# @
- bounds = font.getStringBounds(str, frc);' T5 _* B) a. h# \3 N$ E
- return Math.ceil(bounds.getWidth());, }* j- w! ^8 `
- }
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/ y7 b. U6 N$ t3 o! U8 b- da = (g) => {//底图绘制
( F2 y0 o7 ~6 S1 t4 r6 G6 j - g.setColor(Color.BLACK);
1 b1 @/ b$ m$ k; S3 |" w1 v - g.fillRect(0, 0, 400, 400);; d9 M* Y' C8 T$ _( u8 o# h/ D7 E
- }
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- db = (g) => {//上层绘制6 R2 R# {+ c% @% ? L& D
- g.setColor(Color.WHITE);
+ X* h5 X: x/ b$ m5 i: d! `% ] - g.fillRect(0, 0, 400, 400);
1 Z2 {/ B. V1 ^5 u1 y - g.setColor(Color.RED);
4 w" o, E- |7 X7 D9 e - g.setFont(font0);
* P( c3 `7 F/ V& Q - let str = "晴纱是男娘";( u# z8 L' Y2 s8 W
- let ww = 400;
4 k- E, t; c, c3 A% ?; \# H' P7 P& f - let w = getW(str, font0);) g% p: s& c! s" ]1 g; j
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
4 `" Q I, @9 y4 z# f$ C - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {' r- V- M8 E6 G0 y& U7 e
- let info = {, U5 b `9 X; E* ]* q( Q1 b
- ctx: ctx,
- Y; v: M" e& q - isTrain: false,6 y8 U8 E$ e% e2 j8 }
- matrices: [mat],9 m. u; R. I& }# }; p, u: R( F
- texture: [400, 400],& u/ W6 i! C( {/ s: ^* ]
- model: {
- N3 s+ z; B! b9 m* F2 T - renderType: "light",
* S1 A$ M7 R$ x9 {9 K% ] - size: [1, 1],8 x, o1 W+ R5 o, e+ L: r: L
- uvSize: [1, 1]
* Q( }" \) }. R, g9 J, t% R3 m - }
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- let f = new Face(info);$ e: K' N- g9 t5 w; r: S
- state.f = f;0 E7 P4 p2 c+ e- U" i# r0 i
$ N; q+ Q+ Q+ _: g- Q' y- let t = f.texture;
$ W+ p, J- }- o) A0 h4 M - let g = t.graphics;
! Z& Q: W' \5 t% _9 Z5 a - state.running = true; J' J2 M1 T: Z; q1 g- W
- let fps = 24;
S1 T5 m6 {0 { - da(g);//绘制底图
6 q. q3 [* K$ L* B/ i. y9 D) { - t.upload();
- D# M8 T% L" O8 v# ?0 n& ^9 A - let k = 0;; m1 l v% }/ a) c' O1 b
- let ti = Date.now();: Y4 y$ D9 n/ ^& ^8 _5 i5 w
- let rt = 0;: j! j1 I8 ]. p) R! B
- smooth = (k, v) => {// 平滑变化
2 M1 O9 B/ ?! B - if (v > k) return k;
4 F# t7 ~0 Q$ B - if (k < 0) return 0;
* [* I ], c5 T" D2 m - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ z: c+ Z+ `! W( p) Z' \ - }3 q0 c! ^5 w/ Q2 E
- run = () => {// 新线程: _( ?* \6 ?# J$ ^) q6 p
- let id = Thread.currentThread().getId();7 B, D t3 _7 p* K- B
- print("Thread start:" + id);4 Y. R( Z0 K5 n$ ^/ w* `
- while (state.running) {
- N, e# P/ s& A. @8 `. b - try {
. y: |7 C5 @4 T, h - k += (Date.now() - ti) / 1000 * 0.2;- s7 `6 }2 K- X& T
- ti = Date.now();
: t0 p( S- Q# w - if (k > 1.5) {- W8 @' p+ {: N- n
- k = 0;: r$ R5 s) e! w# u3 A; F
- }' J$ z- x# ] |
- setComp(g, 1);, p! L. k! N1 g0 r" d2 j u; g
- da(g);
1 B6 `4 ~4 t4 b7 L' W - let kk = smooth(1, k);//平滑切换透明度6 N+ O4 L! K8 ?3 _8 L1 k: E
- setComp(g, kk);
% u/ y0 h1 b+ ~: Z. d0 ]. V) b - db(g);3 n! B1 B% F5 {1 i
- t.upload();
* b# M, m$ f4 u" Z" T* `" r" p - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ B6 r* K6 `& ?( m" ] - ctx.setDebugInfo("k", k);
5 ]5 |1 P7 q5 e& P; r2 P( S - ctx.setDebugInfo("sm", kk);
1 `9 s6 i+ s) }8 R - rt = Date.now() - ti;
2 n; ?3 o0 ?9 e - Thread.sleep(ck(rt - 1000 / fps));
. X6 ~% F" q! k4 {2 E - ctx.setDebugInfo("error", 0)
$ D8 N- r5 D- D: h$ e( O - } catch (e) {
! m$ z' E" v' H7 A0 x - ctx.setDebugInfo("error", e);
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- }3 E* D7 e+ I3 l$ _4 ^1 k: p" X
- print("Thread end:" + id);* O8 v7 f7 t$ d- N9 o" Z, n4 t' f
- }
6 W! g) u( K! G. S: [1 o - let th = new Thread(run, "qiehuan");
/ \5 D. ~0 a5 r- b" a4 s7 B - th.start();
9 D6 _! \8 i" S5 x# K) f - }( \3 e1 |* L; k, U7 B3 }# [
- 3 s" i* E1 Z; I* c' A' w
- function render(ctx, state, entity) {
# U+ w% d2 ]; M% w - state.f.tick();# F" q4 [ H6 i3 E a( F& H7 l/ f
- }7 _6 M0 S7 H F- n
8 { e: Q' Q) ~! Y7 @- function dispose(ctx, state, entity) {
9 h3 [) {6 Z, b! B - print("Dispose");
, s8 ?$ N9 `9 m. E* M - state.running = false;" ~! P1 w/ t6 ^3 z* T% z u
- state.f.close();
8 h: L1 F" m& K, @+ [: I - }
1 U4 s0 z; { y) m" |* m4 ?
1 A2 ?0 a% Y8 P$ @6 h: l- function setComp(g, value) {
: T2 d1 v9 P5 i3 k6 V - g.setComposite(AlphaComposite.SrcOver.derive(value));
. H6 }' C# z- @ - }
复制代码 . |" M3 u$ h* ?# ?
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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