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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。8 O& G" D7 s9 g! Z( m# b
- importPackage (java.lang);
3 P6 W6 [# l0 A. G% `7 @3 w/ O9 x# @ - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));$ a8 b9 c) O; L/ V( d% W% X
- 5 s/ f- J4 E3 r' E T# i4 Z7 U7 M4 E
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! e) V! i# k9 u7 c
7 k7 O6 g; \' R; P+ A$ ~5 T- function getW(str, font) {0 R2 A1 e) Y5 h2 z: W2 R* \1 Y
- let frc = Resources.getFontRenderContext();0 r+ I- ^0 t4 G- N3 v6 x1 Y8 j
- bounds = font.getStringBounds(str, frc);
' [$ a0 y; L; D, n8 t1 k- ` - return Math.ceil(bounds.getWidth());
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x+ }" y1 P! `: r1 b; k8 D- i4 [- da = (g) => {//底图绘制
8 D& {+ o6 U+ h& z" f3 T8 |& a - g.setColor(Color.BLACK);
- `2 b8 K$ e& F5 |( p4 n - g.fillRect(0, 0, 400, 400);% R' A+ W, R! A/ W& ]
- }
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( A. `/ L5 z! U- db = (g) => {//上层绘制
( c3 W; B( j! r" _; L - g.setColor(Color.WHITE);$ x! b% q# `% L! J, w( m% W
- g.fillRect(0, 0, 400, 400);
2 v# d2 q4 O/ y( b8 J! J, p3 L - g.setColor(Color.RED);
5 e4 z7 _" W, D* V& Y( w2 _ - g.setFont(font0);
3 p0 H8 E% X7 h+ ]* o - let str = "晴纱是男娘";
2 {3 }8 H9 q; ]8 m' g - let ww = 400;/ F, P" h: Z3 o' ?7 x* X
- let w = getW(str, font0);7 \0 U/ p7 c+ k
- g.drawString(str, ww / 2 - w / 2, 200);
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6 d$ |% h t# Z- N# L% h, C2 N& c- const mat = new Matrices();
1 |& @) m+ e( M% q9 V - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {. w& E" g) z9 X e8 Y" C0 n/ U
- let info = {
# b# B! m; _9 b. m8 e4 f! ?+ q, X - ctx: ctx,) c5 E9 Z- D% o0 Q
- isTrain: false,
: O8 q$ R. |6 G! n/ M/ e - matrices: [mat],
( g# O9 O4 Q+ b0 \ - texture: [400, 400],
# ?0 S# @, r* ^# H! T! r0 q4 a3 R - model: {
' M7 v4 `( F% |0 f" v; U# K - renderType: "light",
. n2 @3 e) R4 h$ c: h+ l3 K - size: [1, 1],
; P5 M- N! R3 B7 a4 J y5 J2 D - uvSize: [1, 1]; ^8 ` ~, K4 w
- }6 [/ X) U4 w7 J( z( o8 B- V
- }
) u' l P, [ F: _! E$ b7 f - let f = new Face(info);/ B: [! m7 W M" M
- state.f = f;
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- let t = f.texture;
) Q' U: _* v+ u, L - let g = t.graphics;% m: `! f4 N$ s k' ^
- state.running = true;
# C# r9 i0 m: y - let fps = 24;
# ]* C7 B" J4 X+ q, h5 [ - da(g);//绘制底图
8 U1 O z/ R- X& o5 p) Z1 V - t.upload();
+ e n# ^. ^% i+ X2 x8 b - let k = 0;
( `3 k0 Q6 c7 Y% n - let ti = Date.now();" t2 M0 \5 r! r3 x- B
- let rt = 0;3 S; e$ n" e* ~' C5 i2 h( ]2 j" Q5 Y
- smooth = (k, v) => {// 平滑变化
( ?" F7 h9 p7 |1 @( W: i- P9 e - if (v > k) return k;
) V: D ^7 p; H& ] - if (k < 0) return 0;$ x0 f0 u0 r/ g+ }- v, u9 j5 W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 _, i5 F& }+ J; z" m - }. q& h/ A, \. C. V! }1 r
- run = () => {// 新线程 s+ \ f9 g4 n- N- Y. S3 @' p! m5 `
- let id = Thread.currentThread().getId();2 W6 |2 [+ [* k, }( B
- print("Thread start:" + id);) e0 m# \% S# H" F. n9 f' l& [! t
- while (state.running) {6 H8 U" U) F" _/ n: A/ x: ?
- try {! e# T, j9 @' l, P
- k += (Date.now() - ti) / 1000 * 0.2;
4 {) o, J8 t$ W& {0 V2 d# ^ - ti = Date.now();7 W" m- [( H/ o) k2 U9 y( j3 ]0 G `# h
- if (k > 1.5) {
4 ?+ m6 r8 q" c. |; E- v - k = 0;
& s- g2 \. d$ `" I - }
6 E( S: }0 i3 n* M' Z' z# f1 ~ - setComp(g, 1);
4 B6 b4 J( ^. t# h - da(g);
* V) S# F' K7 |* g- v7 k* O - let kk = smooth(1, k);//平滑切换透明度& @& |- ~5 e5 q
- setComp(g, kk);% h0 }& a9 _ T- A
- db(g);5 N: S) i; c) z T( `# A l
- t.upload();5 {! c: ?1 ?% |6 x0 J" ]2 V* t
- ctx.setDebugInfo("rt" ,Date.now() - ti);6 b( K; J+ z3 Z, x, m
- ctx.setDebugInfo("k", k);
! w; z+ @- o+ H6 A3 H4 K3 a G - ctx.setDebugInfo("sm", kk);
, N, C" y- w+ H$ X0 { - rt = Date.now() - ti;
3 ]: F' t/ a/ F2 _4 J* ^8 I" y7 N/ P - Thread.sleep(ck(rt - 1000 / fps));
6 w) m) n( W6 e r" `( P2 @. t s4 t9 ~ - ctx.setDebugInfo("error", 0)
+ Q1 Z: w- L' y1 [' O - } catch (e) {' U$ y# M$ B$ ^; ~
- ctx.setDebugInfo("error", e);( i7 b0 c) Z9 I0 C0 ~
- }
# G7 s; {( B8 d( A- \! z - }& m5 y& ~6 W1 s) a/ W2 t% B
- print("Thread end:" + id);
: H8 j) d; C- h1 ^ - }! M' P- x6 _4 ]- U' D
- let th = new Thread(run, "qiehuan");
. z( w" w4 D4 _5 Z* x9 z, R8 M/ g - th.start();
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: S E& S" I1 i5 _* S, l- function render(ctx, state, entity) {5 Q5 Y+ E3 [0 G1 j' h# q# N
- state.f.tick();
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- , G5 V! B2 E& n. h3 k+ [7 H4 q
- function dispose(ctx, state, entity) {
$ {& e! ?6 a! J9 k$ J/ p% D) G$ J - print("Dispose");" |2 i& f+ t0 Z4 {+ w1 `8 C
- state.running = false;
6 D( f5 ]& K0 v8 B* F5 I+ p% q, x - state.f.close();8 f9 {! d/ a2 {+ `9 S3 a1 f) a
- }6 g4 C* I$ ~' J1 }0 [4 k% _8 t
- : } N2 K8 z- u4 Y1 K
- function setComp(g, value) {
7 x2 h8 V8 V, ?% L( `: s: @ - g.setComposite(AlphaComposite.SrcOver.derive(value));0 ]+ v3 W, k+ t! H( D
- }
复制代码
* J9 H9 }+ 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。5 f q! k: l7 E$ C, m) A
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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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