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3 ?; H- L, }. a; X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 q3 N1 B/ c0 U- W* K% J' q! N( P- importPackage (java.lang);. i2 X7 F3 }6 i9 j" o1 B. @
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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7 W5 l) z( z9 l E5 V: H) {- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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! q; ]! l: l) \. m; l" ^- function getW(str, font) {
' I; G; t( Y7 f& I+ J7 h2 G; T - let frc = Resources.getFontRenderContext();) I1 s8 O4 d d! f, t1 T
- bounds = font.getStringBounds(str, frc);
$ Q: N4 ]9 h* J0 s2 h2 H - return Math.ceil(bounds.getWidth());" d/ f. \7 T# B' R2 Y$ j
- }
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X Y5 @+ M& @ }3 \9 T- ~5 _- da = (g) => {//底图绘制6 L$ q+ x5 m: W/ u, Y( v
- g.setColor(Color.BLACK);$ B2 `: d- Y- k5 ?% l! \& L
- g.fillRect(0, 0, 400, 400);
# i. `: K% d7 t - }1 _3 K) O- ~: n( Y& u2 @1 S3 @- B0 b- v
- # m- m+ _9 j' v
- db = (g) => {//上层绘制
* j4 D) @2 z8 E% |; t3 Q9 J$ w - g.setColor(Color.WHITE);
5 a) X/ c# j( c9 I - g.fillRect(0, 0, 400, 400);
3 Q. ~6 @" L3 s/ w+ j* _ - g.setColor(Color.RED);. i( W# `3 h+ l3 ?% ~
- g.setFont(font0);
' l! {: |4 o+ N: Y, Z - let str = "晴纱是男娘";( k; `- S" h) z
- let ww = 400;" b8 \+ Z/ m8 Y; Q' b `
- let w = getW(str, font0);/ i5 H3 ?& p$ k
- g.drawString(str, ww / 2 - w / 2, 200);
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2 G& R3 N9 K; j% c- const mat = new Matrices();" Z5 t5 X( D/ X
- mat.translate(0, 0.5, 0);+ G. e4 z+ F- w( a( C- g
- ) \& L6 @8 L- r7 v$ P2 y
- function create(ctx, state, entity) {3 { G9 ` D3 D1 \ ?$ B1 E2 B
- let info = {
) s1 ^( x i& T/ B' G7 \" ~ - ctx: ctx,9 a" ^% X8 r( U+ `( e) P
- isTrain: false,
% B3 q5 L, x: G) y# } - matrices: [mat],& Z( f/ A+ O; w$ W( `8 d+ R5 u
- texture: [400, 400],
- g1 T' i& s3 e4 l2 x% U5 K - model: {
8 |8 a( L" H5 m; S1 K0 S0 n. ` - renderType: "light",/ ]' f1 P+ H( u3 X* [8 Y+ |1 W
- size: [1, 1],
% G% u/ r( S3 _* z - uvSize: [1, 1]
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- }+ P- L/ B7 L) M8 g; ~
- let f = new Face(info);! t; G. x8 _: h$ l2 J
- state.f = f;
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! j7 b6 H0 w k( D9 K7 L- let t = f.texture;
: T' n& A/ o. I0 d2 x - let g = t.graphics;* U4 Q% `' j/ P3 \: @
- state.running = true;
K$ K2 F; j6 E - let fps = 24;+ ~& X2 ?7 y% }0 ]
- da(g);//绘制底图+ \ |9 u! C( K( d" y
- t.upload();: v( r' j! ]: z; t
- let k = 0;! j% q' \* |8 }. T
- let ti = Date.now();
% {/ ~# }3 B% ?4 @/ @, @ - let rt = 0;# e1 J, f( V, d# K8 I4 f* e ?
- smooth = (k, v) => {// 平滑变化
: t' d; F" D1 F, W! C1 x - if (v > k) return k;
, S4 U& @( X; }# z' I3 f- \ - if (k < 0) return 0;
t" t: v+ @3 L, J" x; g6 } J5 D) { - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程$ ^% E) O* x% i% j
- let id = Thread.currentThread().getId();. m8 q' ]$ J# j8 d5 y
- print("Thread start:" + id);
: q4 a, m) l/ R: s - while (state.running) {
* X. _/ d' o1 h1 j+ f7 U - try { [& r0 g6 L H6 e* `7 j. [% C
- k += (Date.now() - ti) / 1000 * 0.2;
8 w" @& v/ [! ~$ B5 l2 N' v - ti = Date.now();5 n6 H8 o" B" ^1 N7 x: J' F# G
- if (k > 1.5) {
% M k6 ?5 v. P0 u$ G - k = 0;
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- setComp(g, 1);
/ e& T$ I1 a9 F' s. S: j! X - da(g);2 ~6 A- p, r6 o0 v: h( f
- let kk = smooth(1, k);//平滑切换透明度
0 |% ^% ]# E" T5 b - setComp(g, kk);
" ]4 I4 S) R' k) L( h5 i - db(g);
. z. E2 y/ h! D, j - t.upload();) n6 l1 z0 r3 K
- ctx.setDebugInfo("rt" ,Date.now() - ti);: {) p0 s! @ e
- ctx.setDebugInfo("k", k);
% }. D4 {* I. u' o& V/ r \: W: D y - ctx.setDebugInfo("sm", kk);
( ]7 L# X& w5 t) Y/ Q9 o - rt = Date.now() - ti;
# N. l0 K/ E8 Z - Thread.sleep(ck(rt - 1000 / fps));7 }6 m( u# h! G) y, r0 ], m3 j
- ctx.setDebugInfo("error", 0)
% V& m9 X6 ~ D! c; X - } catch (e) {8 o, z: Y/ u+ s! n5 n! z4 X
- ctx.setDebugInfo("error", e);
! ~* t& p+ @1 k# T - }+ a' e& G( W. p2 t' }) D3 X5 Z
- }
8 i0 y& H+ i, t+ v d - print("Thread end:" + id);4 g" }1 j j3 b8 Y, i
- }
4 \& o, L7 ?" ^7 q5 g/ g! I - let th = new Thread(run, "qiehuan");+ Z- B g3 Y* O0 W) ~# h
- th.start();3 X8 q! O- R) B
- }2 E1 ?% G% a7 X. d3 Q1 S$ p, A- O$ P
- ( `& R# O: u6 d) {/ g, R
- function render(ctx, state, entity) {/ y9 \5 t/ F6 J0 ]4 R$ X
- state.f.tick();
4 Y" c, [# }0 Q- v, s$ y3 m" o - }
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' x. S/ {8 }' m! F) X7 w7 \" {- function dispose(ctx, state, entity) {5 ~, o2 m- ^2 T& L$ ]1 Y
- print("Dispose");% `4 {, o; X, d8 W# }# o( u( t+ h
- state.running = false;
/ y+ E% }2 k6 Z' J( @# \ - state.f.close();7 H! C2 ~2 F3 W2 A. G7 K/ ~
- }# x! I( y# O. }. N! J
9 H d* Q9 h7 e1 w0 H+ V- function setComp(g, value) {0 [3 B& I4 }" i5 |) k/ W
- g.setComposite(AlphaComposite.SrcOver.derive(value));9 b/ p* B( b p& B/ E* t
- }
复制代码
$ a: T% L y- g4 K+ c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。2 Q1 M7 k( e) E
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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)8 Z: ]) V7 H/ X
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