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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。 C' r1 I) r1 m* z, H, Q/ g
- importPackage (java.lang);4 X/ u1 H9 I% a+ r# x$ k2 l3 d
- importPackage (java.awt);
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6 f2 u" ~ N$ B) b/ _( ] Z- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; d% S+ \0 j/ b2 j- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. q7 |4 ^: j& @) d
: G# ]3 f& _1 J& V9 Q3 j- function getW(str, font) {
, H1 W. Y- A6 u" d+ d) _ - let frc = Resources.getFontRenderContext();
\. c5 ^) d r( k1 M* s i# f - bounds = font.getStringBounds(str, frc); ]5 D$ x/ W) R( M. }' t) v4 v
- return Math.ceil(bounds.getWidth());" |- Q- g# g& U0 b3 N& H
- }1 g6 w/ s3 Y" Z, H1 q1 v* C9 k
5 N b% ` m% I* H6 G- _9 K0 p- da = (g) => {//底图绘制6 g8 a6 {- Y: D# W' T8 B/ F6 }, s8 n
- g.setColor(Color.BLACK);! A+ ^5 e/ K4 `9 A: h. `
- g.fillRect(0, 0, 400, 400);0 x& B! |" p. \0 y1 Q" W7 r
- }* ~1 e1 f' {# Y4 @
, M8 \4 R2 H: h- db = (g) => {//上层绘制1 | K4 L' U. v6 b
- g.setColor(Color.WHITE);
/ ~/ C. m1 N9 G' t - g.fillRect(0, 0, 400, 400);
" \* H- m( w4 ?7 e( t9 m0 W! ^ - g.setColor(Color.RED);
, C' n, ?9 _# \1 g - g.setFont(font0); {- M1 L$ t: [1 U! j8 n8 a
- let str = "晴纱是男娘";
0 ]" s1 m# D* Q3 l$ o9 t# Y3 |7 A - let ww = 400;: X) k3 _. }" L' N% V
- let w = getW(str, font0);% j; ~4 o; }. p) g, q
- g.drawString(str, ww / 2 - w / 2, 200);" G6 r7 W, v. f2 ` B3 N
- }
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- const mat = new Matrices();1 _; c! {2 r! h: X% C" B C
- mat.translate(0, 0.5, 0);" b/ o" V8 Z# |9 M. a: Q/ X
! h2 T9 j' h* B! f% ?; `: j- function create(ctx, state, entity) {0 K3 J" x* f" i) g' d5 P; J* v0 l; B
- let info = {4 C8 ]( _' k/ c0 k
- ctx: ctx,
1 y2 b1 z6 U3 g0 n - isTrain: false,
4 ^5 D, M; T% X# U. _ - matrices: [mat], N7 {% H% g( P( p/ o( t
- texture: [400, 400],
9 B0 j& W& W( R% v9 X% S - model: {. p. Y1 j( T* a" k, }5 f
- renderType: "light",0 {( {- @0 a" D q
- size: [1, 1],* E* m$ f/ n, k' g" M3 o
- uvSize: [1, 1]' P/ G! a5 O6 d6 I3 e$ v1 y9 K, q4 L
- }, i) l1 W5 m6 `% Q3 X, ^& I
- }
9 ?8 ^, F" b# V* I- x. b - let f = new Face(info);
2 X& ]. _! L! E; R& {. G7 N - state.f = f;4 G' }8 u, a% n3 H
6 m H6 e% K" Y* Y! P; s- let t = f.texture;
% g: P" Z7 d* e0 ?, ?8 Z/ X- k) L - let g = t.graphics;
1 M! e4 D$ J, K1 H1 @7 e# B - state.running = true;+ l a7 d$ z) U ]/ R
- let fps = 24;6 Q" r ]7 j9 A7 `% F
- da(g);//绘制底图, Y/ G: A% K/ ~1 z* {* M9 f
- t.upload();
) t0 l0 n) ]! D - let k = 0;; j n3 l/ o: |0 J/ y& W
- let ti = Date.now();
* |+ U2 O6 E/ |! i$ h - let rt = 0;. c) g2 d, O1 P8 n$ g
- smooth = (k, v) => {// 平滑变化( w( z9 Y# ~$ [! d
- if (v > k) return k;
& `" c! z2 T/ o5 w% C7 m! T - if (k < 0) return 0;
% I H% y: d: M - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 M# B3 M6 `$ e; w' X7 {' B4 A - }
( T/ I' u$ `1 O: Y% Z3 ]& L8 w6 I - run = () => {// 新线程2 h% n9 n4 C' Q+ u& t$ }+ C7 F
- let id = Thread.currentThread().getId();1 Y8 | ]$ R) Y _) j) c# z; k
- print("Thread start:" + id);4 h7 F$ P y( `, f& [. k0 R
- while (state.running) {% ~# S. B u) a7 s. G' e0 Y# z- j8 b
- try {
7 [ ]8 D4 N+ M) ~8 e& ]# J - k += (Date.now() - ti) / 1000 * 0.2;
) `. m# E) j! F6 h N - ti = Date.now();, ^* l" R# }+ f5 v" B
- if (k > 1.5) {
& V' n$ o: b2 t8 v - k = 0;: ~6 ]8 |6 ]; G& ]$ g
- }4 m$ [2 Y6 P7 I! e- m
- setComp(g, 1);. v5 P8 {+ @4 O
- da(g);, x U" I: j% r3 M _
- let kk = smooth(1, k);//平滑切换透明度
; j( W/ d# I% b+ I5 |5 d. N: S - setComp(g, kk);4 Q) K# G' |/ h) d7 j+ u
- db(g);
6 e+ q' e a$ E+ u( d% v - t.upload();
" t4 C3 O4 \$ o) ]- z% G2 h - ctx.setDebugInfo("rt" ,Date.now() - ti);
3 k" P8 j. S2 ]9 L+ k8 _9 T; O - ctx.setDebugInfo("k", k);
: c |9 K" u# @4 i- N - ctx.setDebugInfo("sm", kk);
+ z+ F- q& G w. T4 i* I - rt = Date.now() - ti;* O S9 N9 e% e5 x! P
- Thread.sleep(ck(rt - 1000 / fps));
0 U& O( A& A7 }# v# y - ctx.setDebugInfo("error", 0)7 {/ z/ D& e( s2 w* Y$ I6 o$ m
- } catch (e) {7 B; Z6 B7 L+ t
- ctx.setDebugInfo("error", e);& ]& y1 e0 J! p3 c/ Q, x& n
- }% y8 `6 \( l! M+ N4 k' Z4 b
- }
$ g5 F+ @4 N: F. r - print("Thread end:" + id);, Q! p1 C8 b. b- @
- }9 A! J) b. S* ]& R3 a2 D% T( P
- let th = new Thread(run, "qiehuan");* w4 |& e5 g+ Q: i/ W
- th.start();3 p% L/ A8 H. ^. W
- }
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- function render(ctx, state, entity) {
1 ^8 L5 j: [ V8 \% {7 ] - state.f.tick();
* F+ U# z) v- d) `6 V - }
: [1 w. d1 O: ]) e
/ b; L' [2 e# T) m4 J* D) G8 q9 e- function dispose(ctx, state, entity) {
$ ? W" `; t9 `/ Q, d% @: J! i - print("Dispose");- Y9 B2 u% L6 O! O7 _* Z
- state.running = false;
0 X% c& u& ~4 I - state.f.close();" h0 v* S; w5 Q2 `3 ]7 K
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6 V0 h+ t" u) ~' n2 b- function setComp(g, value) {
* e% A' F. {) U! M3 ? - g.setComposite(AlphaComposite.SrcOver.derive(value));
/ c3 q1 x% u, i9 v1 Q - }
复制代码
+ M" E: C. A5 K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)" c# t6 j8 a y' _; q4 Y' L9 `. N6 Q3 q
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