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0 g' Y+ W7 ~5 h# [5 L9 \! r: ?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。
$ D4 r* ?) F" H, I* |. G- importPackage (java.lang);8 F( w0 ^, S! A9 n, D; o
- importPackage (java.awt);* F$ d. N& @( {* U2 ~) q, m, J: V
- & {2 \: P# i8 K! \
- include(Resources.id("mtrsteamloco:library/code/face.js"));9 X' V& }0 m4 S' {; p6 |* j2 _# O
- 8 Z X9 K. f2 x) n9 k
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
% d Y: J) ~6 [0 N: Y# w* h - let frc = Resources.getFontRenderContext();
3 R$ B% A- t7 b& a" N. q3 m - bounds = font.getStringBounds(str, frc);6 j% n0 o0 S N6 N! G$ Z
- return Math.ceil(bounds.getWidth());! C8 m' I3 [& J% p; B0 @% t+ C
- }
. E6 C1 W! z/ z7 S
- K- E0 ~) N9 m- da = (g) => {//底图绘制
2 q2 o/ ~& A! F Y - g.setColor(Color.BLACK);
7 u8 l" W' D/ ~! q7 ] - g.fillRect(0, 0, 400, 400);. ^% \9 I6 w4 W+ L! M
- }" | B' T: C, W' r4 e
: x4 v+ F5 \! u0 p, t" z2 Y- db = (g) => {//上层绘制* U- `+ Y; k9 B- _5 u' v
- g.setColor(Color.WHITE);
8 j. Y- X3 Y9 }$ K0 b _ - g.fillRect(0, 0, 400, 400);
" C3 t2 H. K8 [( J+ I - g.setColor(Color.RED);
$ l0 T2 P8 r x+ n5 H5 z - g.setFont(font0);
+ p" Z1 S) _0 r3 `( t - let str = "晴纱是男娘";# k0 H5 y% w L
- let ww = 400;
: C2 o0 j' }% g2 P - let w = getW(str, font0);. ]& f5 X& ]' O) {# I
- g.drawString(str, ww / 2 - w / 2, 200);0 S8 y! U# \1 T' F. r6 _
- }3 ~- m* p" H0 V# ]7 d
; p! \& s' k& i: J1 u" F- const mat = new Matrices();* [0 K& }. f. m$ L
- mat.translate(0, 0.5, 0);5 B+ W* p1 C: ?, A% o3 {- E" E
& U! L9 |9 ^) b+ ~ o0 q' ~- function create(ctx, state, entity) {) w2 f. Y9 x+ J+ N$ r/ N
- let info = {
' D0 E3 z/ m& Y9 k# h" M; c* g - ctx: ctx,5 d0 p. l2 U8 Z# Q# m5 a' k3 `! f
- isTrain: false,
5 W8 b6 [4 p& p. Q7 I7 b+ l8 c - matrices: [mat],
$ W' i% k* g) R7 A) ^ - texture: [400, 400],' V z% C4 M0 L; U/ Y* c! o1 i: w
- model: {" q2 a2 Q0 |' E
- renderType: "light",
4 Z# Z8 g! q3 O5 t. } W - size: [1, 1],
0 S3 g5 f: \' |4 y. I - uvSize: [1, 1]
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- }4 F8 J2 I* \, ?- |0 e7 K2 H
- let f = new Face(info);
6 D4 U' h9 @1 }+ i. h5 |) F - state.f = f;
6 U" r& F3 @- U1 K# V/ X
* d& a) Z/ m4 n. o* n1 m- let t = f.texture;
) Z" f. E: E$ p: @) c/ N1 X: [$ O - let g = t.graphics;
, [( d( z8 m, H - state.running = true;
$ D+ P; b. K* V! t4 c' y/ O - let fps = 24;
3 r! w: U% f5 z+ p3 n - da(g);//绘制底图
2 f5 C' ?, r3 W" V - t.upload();; k' h$ @. | b- b2 ]
- let k = 0; z$ \5 [# u* U* C r
- let ti = Date.now();
4 h; B2 @; |3 J1 G% G7 H - let rt = 0;
% _& C$ b6 E* H4 q - smooth = (k, v) => {// 平滑变化0 `7 q% ^, x7 ^2 B- S9 t5 I- J( \" H
- if (v > k) return k;1 w, f/ [5 A7 j# ^+ g ^9 p- k' v
- if (k < 0) return 0;9 ]0 h5 C) @3 K5 B- [
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
7 I- M( ?8 X# q3 `! _0 ] - let id = Thread.currentThread().getId();0 p6 h6 t6 e9 R$ h1 Y3 `
- print("Thread start:" + id);
6 S, R, t3 ~/ U L3 D, t' N2 i - while (state.running) {
5 h w' a w& k& P! c4 W! c - try {2 u" J+ ?( Z2 g5 x9 } P! g
- k += (Date.now() - ti) / 1000 * 0.2;
3 D4 y) R: k- I1 z$ ~! i( `* v - ti = Date.now();
0 x$ I$ {9 B- B1 }3 |3 F$ ]( F" e - if (k > 1.5) {
/ l# D: { P" ?; C" n4 T# w - k = 0;: A3 w/ H( O0 X6 P( C
- }1 k( I" \/ m0 y' `" b& q0 ]
- setComp(g, 1);
2 T, I: J& I+ H - da(g);7 k2 I: l2 O) p. w
- let kk = smooth(1, k);//平滑切换透明度$ w+ o7 g3 v, i! m% B* e
- setComp(g, kk);: {- W+ l) E6 f; f2 W4 o
- db(g); g! {' C Z$ z- Z4 Q
- t.upload();: Z. f( _4 @& o L# _' ]
- ctx.setDebugInfo("rt" ,Date.now() - ti);8 U* @: g/ j) H. Z6 u9 q) M4 l* u: n; J
- ctx.setDebugInfo("k", k);
% m- T& b+ J. n' P5 _: W - ctx.setDebugInfo("sm", kk);
7 ^- R0 e6 m J2 _/ B - rt = Date.now() - ti;% c6 U/ M5 l$ y/ e( I/ k. B' F
- Thread.sleep(ck(rt - 1000 / fps));
$ n1 Q9 S& W# P - ctx.setDebugInfo("error", 0)
" C# w. J, h/ j" g; E" t - } catch (e) {/ A! k5 a% h d3 k! ?, |9 K2 c
- ctx.setDebugInfo("error", e);5 _$ X/ c" e( R" S3 ^+ k" s
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
: a2 Q6 a5 w# N - th.start();
% ]$ m z2 h2 q, t - }
1 w: k4 D+ [( g4 F) ^3 ?
3 S- e# }& N( h6 O) _) m' ~- function render(ctx, state, entity) {
$ b, a+ @8 t3 ~0 x3 _0 Z+ E/ X j - state.f.tick();
, a T2 p2 h+ ]' L+ g8 Q - }
1 m9 ^3 y3 _% e; d6 X, w
' s, N' K3 ^2 N% d: Y/ a! s- function dispose(ctx, state, entity) {
* W9 ]/ m. l& h; R/ _- R - print("Dispose");
1 l' ]0 n7 Y& L2 e$ L' x/ t, n - state.running = false;/ ]+ J- S# f j; W( j" C8 e
- state.f.close();
/ o5 c9 g! h( t - }
7 e- M$ Y; j* P: C- \8 H
; q1 l$ S4 P8 t( f! E7 H3 i- function setComp(g, value) {$ X2 b) q: p/ r$ W
- g.setComposite(AlphaComposite.SrcOver.derive(value));7 H+ b( z# z- l4 o5 O
- }
复制代码
" v ~5 p+ H9 G% k' G1 ?( y9 p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。, k4 E: [0 Q$ j7 L4 o6 B
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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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