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1 E( w% z) t: M' L: V* a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 n6 Q h' u; [1 v
- importPackage (java.lang);
* u5 i' u! ?6 H( ?& D; M& `; E - importPackage (java.awt);6 I& X$ r4 @5 p
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- 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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- function getW(str, font) {8 H$ b5 m% C' L3 {
- let frc = Resources.getFontRenderContext();" K0 N$ ]$ y" i4 F3 n
- bounds = font.getStringBounds(str, frc);
+ ]% } e# R: y4 T - return Math.ceil(bounds.getWidth());
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- 7 g! `1 m! n. f) u
- da = (g) => {//底图绘制
% A) {& T+ z2 b g - g.setColor(Color.BLACK);
* n6 n* h' d9 I3 Q- {; n - g.fillRect(0, 0, 400, 400);- }5 u# X2 A0 Q% @* e( C& b
- }
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) X4 u3 @. M2 q. Z# V X3 R% T- db = (g) => {//上层绘制
) V0 d+ y# z, V$ x9 x) l - g.setColor(Color.WHITE);' P T. Z' U/ \. ^+ W( V3 w$ T
- g.fillRect(0, 0, 400, 400);
6 W2 w9 f5 @" _! S h - g.setColor(Color.RED);3 x2 y, N1 v+ V7 d, P8 m, k# E
- g.setFont(font0); z i7 ^: a! g0 m5 o
- let str = "晴纱是男娘";6 J/ I6 t Y" ?* p) m
- let ww = 400;2 ?4 R2 r. ?: r; h- H
- let w = getW(str, font0);
x- Y# c5 w! a6 {% }: J& o2 M" c& D; K - g.drawString(str, ww / 2 - w / 2, 200);( X& c7 C9 ?4 O& l& q
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3 M" O/ T, b2 Z- const mat = new Matrices();) Z) i! ^# c/ W, [* z9 C; a. F
- mat.translate(0, 0.5, 0);" I* J8 d4 ~# O7 H% T/ f
- 2 ?# S( L5 T; U& l
- function create(ctx, state, entity) {
' b& f5 y; n. N% W# U% l - let info = {
3 ~$ q m- n" m" n' Q* t - ctx: ctx,5 [' O3 h6 h5 M" M/ d* d$ \; D
- isTrain: false,
8 ~2 D6 ?- _+ Q+ C" X" W - matrices: [mat],
- M9 W! h# p* h- u: P1 ` - texture: [400, 400],0 S( V9 k0 Y T2 E
- model: {
1 Y2 D+ j3 k7 q2 W - renderType: "light",
3 w P5 B, m% T8 x - size: [1, 1],
# Q( q$ Q/ i' I2 _; m! Y - uvSize: [1, 1]
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- }
. R. E3 O8 Z0 f( h/ r8 w; ^/ ~ - let f = new Face(info);7 I/ C$ L0 L, [# _& n
- state.f = f; P/ L/ Y$ F* i9 Y
- - \# N- H9 c# }% w! r* M+ S% n
- let t = f.texture;$ i" i$ W/ _7 Z- r ~# C, |' y
- let g = t.graphics;
* Y. V4 s7 z. Z* E - state.running = true;7 ]0 n2 W( _! d9 n! O. P% D
- let fps = 24;
) k" [: I A" ?4 f+ Q" u - da(g);//绘制底图
0 S( _8 e: s% h/ I - t.upload();6 U5 s' E- ?. \6 P
- let k = 0;0 i4 V; M) u: O2 I( O: _4 s
- let ti = Date.now();4 S; K* H) Q+ T1 K/ O/ H( }
- let rt = 0;
1 d! [- z$ r+ o0 E7 g - smooth = (k, v) => {// 平滑变化
$ O) r! M7 E5 Y) E% O Q1 X - if (v > k) return k;
/ ~ w3 q7 T8 ^) C( V* Q - if (k < 0) return 0;
- Y& K4 r( m4 W. U$ a/ a9 Z1 l4 D - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 C& Z2 M. X+ J2 V J
- }
8 G% u" m7 F0 Z& c" X! i - run = () => {// 新线程
1 Q5 j A9 r9 q& H4 c9 G - let id = Thread.currentThread().getId();
1 w. f! Q! x- [7 \4 w - print("Thread start:" + id);5 G9 a) T7 b9 b& E' Q
- while (state.running) {/ E) v3 S4 J8 G9 G4 ^$ X2 ]2 ?
- try { }7 A- x. j; C
- k += (Date.now() - ti) / 1000 * 0.2;! ~% }/ m8 n9 t5 a' V' o: Y
- ti = Date.now();# Z( e K$ f7 w8 F: S5 w4 I
- if (k > 1.5) { _# @, `; \( d6 P8 _3 b. c K7 Y
- k = 0;
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- setComp(g, 1);, ~+ `0 ?( H1 P2 i; x
- da(g);
/ l1 B- ?/ v$ o; Z$ z - let kk = smooth(1, k);//平滑切换透明度
8 l; ~3 H$ F2 x) L! ] - setComp(g, kk);
! E. \0 H* R5 ]( X - db(g);$ O) H$ H9 p8 A5 t
- t.upload();- `# [4 a Y) ^5 Z. F
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 D" D6 ], j- a. R
- ctx.setDebugInfo("k", k);
% k- h5 |2 F$ C, m; ~: ?( s - ctx.setDebugInfo("sm", kk);% M2 b: |3 I2 v- e, H' g
- rt = Date.now() - ti;
3 S6 T) x/ k: b+ S; K; G - Thread.sleep(ck(rt - 1000 / fps));
0 Y; N/ \1 M5 O2 X - ctx.setDebugInfo("error", 0)3 i7 Y$ J: y% X2 E
- } catch (e) {
0 f C: r5 h5 W - ctx.setDebugInfo("error", e);
8 P8 y; }, e* _8 d2 ^) n2 ~ - }
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- print("Thread end:" + id);- E* C- c; w% @3 g- d* w
- }( d, N/ n& f$ b
- let th = new Thread(run, "qiehuan");6 j0 s- {. x1 [- J2 O' n" m
- th.start();% |+ j( T& D- Y7 h
- }
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5 j% n' ~0 ?6 o' `- function render(ctx, state, entity) {
4 N( h" J% r& }1 j( E' K; b - state.f.tick();6 N# U6 ~8 `6 t) b2 V
- }
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& J! t! A. ^. t( [2 K4 U' @- function dispose(ctx, state, entity) {
+ t" h, q5 d5 ^7 l7 d& c - print("Dispose");
2 U0 H, s* F; B6 C2 G4 { - state.running = false;
+ Z* J# C2 G) o( a4 ]. v - state.f.close();
* b, _, s8 U# u* ?. ~ - }
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6 Z/ _( X2 V( u4 M- function setComp(g, value) {
: [) n' `: ?/ \# P, U: j$ c) z$ } - g.setComposite(AlphaComposite.SrcOver.derive(value));/ Y" v0 L% [: \0 t+ z7 ?' E
- }
复制代码
. Z2 i$ T* @3 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。: p5 t( h V3 J$ C t4 p7 @
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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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