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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。
+ e0 C1 v! J, ?2 G9 \- importPackage (java.lang);3 x1 _! D0 i5 o& p8 s- t8 g: q0 p; x
- importPackage (java.awt); w, S3 \% u) d5 e- ~
- 7 P! r- y" R! c2 J0 b; m8 y
- include(Resources.id("mtrsteamloco:library/code/face.js"));1 t: @. }0 q2 u& v* ~
- 6 w- M+ i1 n( m }. R
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {% q3 T3 \( z0 ?7 j8 ^7 |: x
- let frc = Resources.getFontRenderContext();
6 K9 j: U" O+ E R. O) @ - bounds = font.getStringBounds(str, frc); Z; q( a8 e7 {9 u3 ~3 O8 @
- return Math.ceil(bounds.getWidth());) J( O/ _& q* K! z
- }
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5 d* b: e/ L3 x: b5 V% b- da = (g) => {//底图绘制
+ ^7 U- [/ w1 E - g.setColor(Color.BLACK);
* G& i% B( J) U$ i4 B7 e- l - g.fillRect(0, 0, 400, 400);/ q' X8 Q5 v3 m4 l) C1 r N! n
- }
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& k" ]& h& C# m; {, g% x- db = (g) => {//上层绘制
1 d( F0 U* o" r& b4 H# Z% m - g.setColor(Color.WHITE);
& d4 [0 ]) y9 h: F- ? - g.fillRect(0, 0, 400, 400);3 e, G L; {" R& E- \ s
- g.setColor(Color.RED);
4 m9 W' g3 P, e9 m9 [) w4 H - g.setFont(font0);9 Q8 S* h. S" ~* h9 t+ C8 |8 k
- let str = "晴纱是男娘";
( i1 J, W; S! Y9 @/ o - let ww = 400;
, H$ K3 I- Y7 U; o {0 J0 ] - let w = getW(str, font0);
4 Z9 f: q5 D2 L3 {2 b - g.drawString(str, ww / 2 - w / 2, 200);6 w$ _8 u6 g( m( Y& ]$ c& {0 h0 d
- }: M% R. K- i" x% a- }7 N% \2 s
- $ ~. C' D3 l" ~5 k( e4 d$ b
- const mat = new Matrices();
# _7 g* t: `! ~6 [0 Y7 L - mat.translate(0, 0.5, 0);& q, }/ U3 M$ p6 ]2 K+ n( z& E
- ; Q% ~; E7 Q2 V$ M l
- function create(ctx, state, entity) {
4 ~5 x3 T! g" a @5 `. n - let info = {
' l* l( J% t+ \5 t2 f - ctx: ctx,- q8 ^1 ~, i4 T9 ~0 Y) U/ }
- isTrain: false,
0 r! G. M: `8 \ - matrices: [mat],
' J. A; ~! x4 H& q+ n - texture: [400, 400],; Y5 }* d7 b# i9 v
- model: {
3 J0 Q2 I! q2 U& v - renderType: "light",1 s1 ?* \. n- `! W2 l! `
- size: [1, 1],
4 z/ K; j0 m6 q" i" H& W! m - uvSize: [1, 1]. b! X+ Y' O" Q o# Y
- }
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- let f = new Face(info);" J8 N0 n$ t) n7 Y+ j2 s( }" K
- state.f = f;
* \; W# Z3 e& u q: [
) _$ B0 y6 {7 \9 X$ `0 Q' e- let t = f.texture;! C" g" M4 S3 f H% l L
- let g = t.graphics;
! I$ t8 m3 |6 W - state.running = true;2 m6 a2 s: \$ X0 b1 [
- let fps = 24; c9 W' n9 X5 [7 u( Q
- da(g);//绘制底图* m2 m1 q. s3 m9 U
- t.upload();8 J: E& m3 K- |1 T
- let k = 0;
: ^0 c3 `, C0 U! ^: q - let ti = Date.now();
6 C4 ~+ V" B. Q* Z, z: p& O - let rt = 0;
' v4 h9 u/ U" o - smooth = (k, v) => {// 平滑变化- K+ Q9 i" ? m4 d8 U7 r: k
- if (v > k) return k;. `+ `: W' s& Q0 W A8 g
- if (k < 0) return 0;% F$ F5 Y" a4 Z+ d1 t: o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
% w W9 d) t* ?; G. ^ U, T - let id = Thread.currentThread().getId();, n9 u6 C* l5 m: F" H
- print("Thread start:" + id);9 ?: d0 K8 o; B9 J' d
- while (state.running) {4 x0 R; X0 Z8 ~8 u$ Q+ J* j
- try {
4 u4 T3 F+ X8 Q! H* L - k += (Date.now() - ti) / 1000 * 0.2;
/ O9 X: Z# n* s; K - ti = Date.now();1 X a" X) h9 c# `. z( s; }
- if (k > 1.5) {
. W0 l0 _/ m' x- C! O - k = 0;" ?8 M! T2 m% j2 p% h- @" d) u
- }
3 R3 p! ^- X) e+ \7 Q4 X - setComp(g, 1);) z6 Y3 D5 n/ n7 m9 v' E- P2 N
- da(g);7 M9 ^7 H+ m+ }1 k5 N2 U( _8 y
- let kk = smooth(1, k);//平滑切换透明度
+ n# ?' o/ D. M: H: } - setComp(g, kk);6 j) U. q3 K/ X6 h# J: J' x
- db(g);' D% i9 B( y" S) Q3 h. o
- t.upload();9 q: H4 l. H! L5 S: _! Q" @
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 s5 g( ?! P6 a6 u6 h0 O% B - ctx.setDebugInfo("k", k);
" ?# |8 `7 o' R% I1 x7 U/ J - ctx.setDebugInfo("sm", kk);
7 }5 z9 N3 |$ _8 K& i5 G2 R - rt = Date.now() - ti;
3 {8 O) \" L" Q9 l - Thread.sleep(ck(rt - 1000 / fps));$ c* ^* `5 p! A7 @$ l e* W$ B. z
- ctx.setDebugInfo("error", 0)
/ @1 ^ ~4 ^# J& f: Z - } catch (e) {
) t a" r% B( I `1 z9 Y) ~ - ctx.setDebugInfo("error", e);
, }) c% I" C' ?/ @ - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
2 ]( m) \9 ^- q6 E1 W - th.start();
5 d3 R& p" ]2 h: w( M0 A - }
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- function render(ctx, state, entity) {
) n; {4 W! r! n) Y2 i( V - state.f.tick();4 D2 f5 G% P) C6 f' U' o
- }
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$ {7 b% T. c* a1 [2 S+ i) O- function dispose(ctx, state, entity) {. q; d* P+ p' h9 z! B n5 s( r
- print("Dispose");- X( ?; N- _. R. k
- state.running = false;0 n( b$ ]8 k8 X+ M& W- f) S5 Q' t
- state.f.close();; [7 L( S( O4 m% x
- }
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- function setComp(g, value) {5 e% }2 M7 ^; X9 x4 n3 p( P
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 [) l( X% o9 S - }
复制代码
0 V, S# |0 o1 a' d# j, D/ ~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)& I" c" I; R2 y# ?, }4 t" q
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