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& M7 @) r$ t# A& h- ?/ b9 W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。
6 E# X7 O$ S& J: r( f" y* R1 ?( b- importPackage (java.lang);
& f1 l( @6 v3 p; q+ U2 K. r - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ @7 e- {& R' U. U1 O( `- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
R+ N q1 I) ]$ b
: ]. J% D6 D# A$ k- function getW(str, font) {: t' o4 b8 {+ v% e `3 m$ U
- let frc = Resources.getFontRenderContext();
h! t5 Y# X# E) d l9 j - bounds = font.getStringBounds(str, frc);) ~# X3 x N0 k" `
- return Math.ceil(bounds.getWidth());) F# i. W% H: {* @& z! \2 I
- }
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: D$ P0 ]5 B G- N `- da = (g) => {//底图绘制; O R% M$ `7 B2 d! M5 D6 @( K0 T, e
- g.setColor(Color.BLACK);
5 o2 ?. ]: N& N - g.fillRect(0, 0, 400, 400);4 C$ W# Z2 ^" H& ^ _7 b& L! e
- }& y/ e2 L" H' b& ~" s% {
2 O4 F2 B* V" E$ i2 f9 o# f' X- db = (g) => {//上层绘制
+ M( S+ U. v# i% F+ R: D - g.setColor(Color.WHITE);' r$ |* @0 _, u; O" ^
- g.fillRect(0, 0, 400, 400);; B* \( u: n1 m! n+ z. Q
- g.setColor(Color.RED);
" g. D$ V( Y7 K* {0 O0 R - g.setFont(font0);! j) H) c; L+ Y
- let str = "晴纱是男娘";
0 g' D' z* X4 D" V% s) p6 b - let ww = 400;- N; G3 @- b5 P
- let w = getW(str, font0);
4 ]& W; `2 ~! L - g.drawString(str, ww / 2 - w / 2, 200);
, S1 v8 r$ {: b$ _: F: J9 b$ B - }
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- Q+ b. O" f5 H; Q3 p8 D4 c- const mat = new Matrices();
4 G) O' }! q, n7 F - mat.translate(0, 0.5, 0);
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6 T0 n4 i+ k! u1 ^/ ^- function create(ctx, state, entity) {
& H! N- n" E a( r$ A - let info = {
4 i- y$ \& ~& f" n - ctx: ctx,: K4 ?7 v3 [ ]4 S; _7 v
- isTrain: false,
1 {% _. D1 Z3 {' S3 Z8 ` - matrices: [mat],& v7 a& n+ [( [6 Y6 |
- texture: [400, 400],/ c3 r# F. ^) \6 V5 z! @, ^) J+ S( D2 T
- model: {) H0 n3 ~+ Q: P" v* n: ~. S/ M
- renderType: "light",
0 `! F7 d8 z% f, A - size: [1, 1], c; U$ e* C$ ^1 ~) H$ l
- uvSize: [1, 1]: [9 P$ z2 m" P: _2 n, F c7 g
- }
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- let f = new Face(info);
( ^3 _; F8 z) V# g! c - state.f = f;
2 ?" I7 `- ?! U9 L" t
( y4 t0 @8 u. a" G3 U- let t = f.texture;
K' U- n# v* C2 a - let g = t.graphics;
* e: k, n* |3 z9 @6 d' ?) N - state.running = true;
0 I( G; e: ?/ Z6 L: F - let fps = 24;- I! b6 B, b* B$ A! c& E( ?. ]
- da(g);//绘制底图
) }7 d7 l2 @% m& a - t.upload();
8 Z. g% Q3 e# A% t& y; \ - let k = 0;) Q3 m: r ^' |1 u% B
- let ti = Date.now();
6 f# L5 R& N% W - let rt = 0; K& W _( H7 Q+ L0 n8 ]
- smooth = (k, v) => {// 平滑变化
) d! E* [2 h* m: v0 [0 E! L0 I/ z - if (v > k) return k;, g0 }1 f: `5 L
- if (k < 0) return 0;. c5 F' q3 w& x/ w# w! u a3 B+ V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( }3 y2 @* t# A, l, T0 U/ P - }
) z$ n1 N2 h5 H - run = () => {// 新线程
3 @+ t! y7 e+ l4 B - let id = Thread.currentThread().getId();
( n, v9 R; R! Y! `0 a - print("Thread start:" + id);9 f8 n$ K* M, B+ R# v( P
- while (state.running) {# ?7 D, l! p, h) ?$ s
- try {
0 G0 q) H3 a% `3 l0 i - k += (Date.now() - ti) / 1000 * 0.2;" ^3 [+ L; V% ?) F8 x
- ti = Date.now();* J5 j9 v: E: [ K( p, f
- if (k > 1.5) {
: ~' s* N$ u* B' f0 ~$ d - k = 0;$ p' L$ o }! }
- }" R. Q) ]& @# ^2 J4 A# _ F
- setComp(g, 1);" F- ?6 g. a$ w; p6 y* e6 o/ ]
- da(g);
7 b- S7 C' e: T% x9 ^2 c3 a* i - let kk = smooth(1, k);//平滑切换透明度
2 f- V5 ~. }' Z" _" Z" }! ^ - setComp(g, kk);
2 C [6 Q) {, W - db(g);
! o: j$ J/ \- y. x A5 T7 ~% C* ~- ~ - t.upload();
- n0 T- m& g/ p; ~8 P* {1 L - ctx.setDebugInfo("rt" ,Date.now() - ti);
# h% _9 `* e7 X3 q: H" ` - ctx.setDebugInfo("k", k);5 F; A( L& G( `1 n
- ctx.setDebugInfo("sm", kk);
* ~( Y+ n8 D' {2 w# D - rt = Date.now() - ti;
q4 U4 e0 r8 n; d. k u - Thread.sleep(ck(rt - 1000 / fps));/ r0 |( l7 r8 E0 K3 J5 Z- H
- ctx.setDebugInfo("error", 0)
! |1 W6 _& c& D% o, L7 P- } - } catch (e) {( v: l- O; l% R6 a. H
- ctx.setDebugInfo("error", e);
0 ~% ~4 b/ h9 G& M! M/ a" y \ - }
* o) [1 y& ? V7 t- G - }
2 z0 z; U ~. n. Q: ~ - print("Thread end:" + id);; }" B* k* z+ T9 U, i
- }
6 Q- A4 t( X* ?% M. u: M$ p - let th = new Thread(run, "qiehuan");
+ N; H3 t# g. h! n8 o+ R* V1 H1 K - th.start();
1 h3 {6 \) z) M& E: f" X% G6 h - }0 s! c9 V: X8 B/ D @: c3 j0 k
4 q. Q9 Z+ g% f$ N! {% ?9 q7 x7 s- function render(ctx, state, entity) {6 k. \- H: w0 A/ M
- state.f.tick();+ ~5 Y3 p2 v) z" m
- }
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d; W- n% a# w! l* u! Z) b( H6 q- function dispose(ctx, state, entity) {
8 h5 n4 J9 ~+ }4 i1 S1 o - print("Dispose");$ G$ e$ F2 M9 o/ ?8 g
- state.running = false;) j! m% v1 r6 f3 }! ^3 {7 g
- state.f.close();( |* v; |3 r W3 j) k% B8 }
- }" @2 }6 F+ s4 T$ i# B
! _7 J% G0 _* ?- function setComp(g, value) {
' p& ?( B; w3 w0 L - g.setComposite(AlphaComposite.SrcOver.derive(value));
/ u3 R% `" m6 B" F, J: | - }
复制代码
: G0 g/ _9 a1 }: B- h7 a* n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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1 w8 `" s2 |7 E8 W0 ~+ S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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