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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。
9 P8 x% D2 c. D) Y" e" k7 n6 S0 a }/ A- importPackage (java.lang);, n# q, F/ O8 B8 v# j( F9 C4 t
- importPackage (java.awt);
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) h; F0 N3 [0 ?- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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; J1 }2 ]. l( G: K$ U- function getW(str, font) {
8 B7 P2 g k' P/ Q$ `1 l% h0 U - let frc = Resources.getFontRenderContext();
3 n1 Z: C- _8 K! H3 [1 T% K' n - bounds = font.getStringBounds(str, frc);2 q ^- h; o8 l
- return Math.ceil(bounds.getWidth());
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- da = (g) => {//底图绘制3 { F% e# M% S! r( m7 [! Q
- g.setColor(Color.BLACK);
. H3 l2 H0 ^1 p. }. S( p1 [- k - g.fillRect(0, 0, 400, 400);/ Z2 f: x0 S8 X5 k( e1 y$ O
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- db = (g) => {//上层绘制2 b" G2 C$ t9 Z# _# C. L
- g.setColor(Color.WHITE);8 ^, b! l* ^% o1 K, _! Q- R
- g.fillRect(0, 0, 400, 400);
5 m, Z; o4 \" p$ N$ R - g.setColor(Color.RED);- h' [0 r8 Y' _3 A( _: E
- g.setFont(font0);1 |+ z0 }2 n/ H! F- l! I Y s
- let str = "晴纱是男娘";
1 p: t! `2 s- s1 u - let ww = 400;
m, J1 O" y. h2 v3 u2 x- C8 P$ L - let w = getW(str, font0);
4 Z) v3 v- O# d- `! U5 |' m# i - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();6 r. U/ n9 \0 @- l4 S! Y; c9 m
- mat.translate(0, 0.5, 0);) o$ I. a" r& Y/ k! c) `- d& [/ g4 e
2 K3 R; i, B. ?+ D0 ~# }- function create(ctx, state, entity) {' d2 S5 B0 ?4 c* l- Z8 y3 M
- let info = {
1 ^' V( S h& [+ ~( |4 f8 ^ - ctx: ctx,+ o9 J/ p. \* [8 P. t
- isTrain: false,
$ o# k9 s* i: O# V- a/ U, O/ K1 R - matrices: [mat]," F: D: A4 ]& ^5 |; Z
- texture: [400, 400],
) ]- z: _; E$ c: |3 {; A7 ^3 | - model: {3 ~* E$ ~; e, y/ {; u$ i# y
- renderType: "light",
6 z* h; i p% W2 Q- h - size: [1, 1],
/ n. _; H9 s4 O - uvSize: [1, 1]
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- }# l- v$ Y1 V7 g9 n% C
- let f = new Face(info);7 [6 U# J$ _7 j5 k. f1 C% q
- state.f = f;/ W" G8 N4 X0 p& r. _8 f
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- let t = f.texture;; l5 e$ B5 S" u; `: @" B$ y/ u
- let g = t.graphics;, q$ s% [# e: @1 o2 ?! G
- state.running = true;7 _7 l$ H# ]$ x* A4 T* z
- let fps = 24;
) m: q2 j8 d# q8 c - da(g);//绘制底图+ q0 \+ {5 m- Z+ n6 N1 W
- t.upload();, n" z: j( E% g2 ^, t/ z* k7 Q. g9 j
- let k = 0;
3 S9 A5 c' l7 Q! c2 `+ e5 Q, | - let ti = Date.now();9 J& `; X! K& ]" `' r0 Y3 n
- let rt = 0;4 ]& M0 q9 }5 T' T* b' o
- smooth = (k, v) => {// 平滑变化
# U% z! W/ y: q: H - if (v > k) return k;
4 z' R0 W3 E& Q" v1 p - if (k < 0) return 0;( B3 G( o- z1 F2 N/ ~7 B3 }- `
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% s8 s- m. O" @/ g, F - }
: L8 J! r8 R0 o9 R - run = () => {// 新线程+ j0 a7 b! E1 z1 ~" ]
- let id = Thread.currentThread().getId();
' }8 o0 d& D) T, I8 F* r1 c - print("Thread start:" + id);$ o1 F* T7 f! N3 U8 w
- while (state.running) {4 w8 ^' X; c7 [
- try {+ D- U( d2 Q1 L9 V- A8 [
- k += (Date.now() - ti) / 1000 * 0.2;1 K1 t& O) N" _) Z5 @, T' X
- ti = Date.now();
# i; @4 Z( n- f5 n - if (k > 1.5) {- j. g. y, p, L( G. E; v6 \
- k = 0;9 Y/ m9 X& q0 N7 E5 m
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- setComp(g, 1); N" X; a6 I4 h4 c" U6 ?
- da(g);, W1 I5 l. W$ r% J7 A/ i& c
- let kk = smooth(1, k);//平滑切换透明度
" @. [) a- r, W* N; B1 m- @2 R. y - setComp(g, kk);$ j4 S5 q) M6 b& H$ p
- db(g);
. b( V5 P+ ]5 x2 z/ I - t.upload();
6 ]# l p+ H2 t3 m; n - ctx.setDebugInfo("rt" ,Date.now() - ti);! @3 W% a6 t* G
- ctx.setDebugInfo("k", k);
+ a# W: Z8 i. @% b' b C - ctx.setDebugInfo("sm", kk);3 h& ]* j% b' o8 F8 w9 x g0 G+ l" l
- rt = Date.now() - ti;
2 ?' F3 I( p9 P* T# \% E* G& o8 ^3 D - Thread.sleep(ck(rt - 1000 / fps));1 ~# Z7 b+ L) ^) F9 J& y5 d
- ctx.setDebugInfo("error", 0)
4 c8 a5 ?( j9 [* Q& P0 w+ c/ j, N - } catch (e) {0 g6 y, q# j/ o7 I6 ]5 }
- ctx.setDebugInfo("error", e);
8 g: b+ g g1 B5 s+ x/ a* E - }
) u8 ^( v. S+ f& s8 X0 B( k0 s - }
+ d! P; S: s& G" ^+ X( O* H - print("Thread end:" + id);9 b1 Q; V7 g9 s6 `% M
- }
# F0 a2 ~" J/ W& t/ J: F, `( u - let th = new Thread(run, "qiehuan");7 T R; n. ~& J; H: H/ y* c
- th.start();4 s9 U# s3 ~/ n7 a% L0 F
- }
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- function render(ctx, state, entity) {( _( }% P& E, p }9 |' Q9 B _( R
- state.f.tick();5 \2 V+ X. C8 |; N; n+ k9 Z
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- ' j' I B6 }1 q! Y- }
- function dispose(ctx, state, entity) {6 q/ M) U' f' D( m* L! i2 `
- print("Dispose");! ?. P3 `3 @2 b7 X
- state.running = false;3 H$ v. B' i) h$ q+ Z9 G& H
- state.f.close();
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c0 x/ O; E" c8 F5 y1 B0 Y8 ~- function setComp(g, value) {2 Q4 y2 M: C, m
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 B# ]; W; @1 k7 I
- }
复制代码 . U; Z o: `+ G# m
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。. l; W1 e |" P
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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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