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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。( r! c* W, O1 g5 C
- importPackage (java.lang);/ F" T& z: |& M
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js")); j0 s; k1 @- k& h8 i
! K% P" L( f' l% o* G- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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6 D! T2 ~+ s# m8 L- function getW(str, font) {' ?3 k O. [- q P; n
- let frc = Resources.getFontRenderContext();
9 o9 z. I+ ~9 l5 S- N p - bounds = font.getStringBounds(str, frc);( M4 X8 t: r. G' I
- return Math.ceil(bounds.getWidth());
% y! O) v. f! j - }
# O9 q) ^- B! _. P
& a8 Z$ |9 `' r) f& C( i- da = (g) => {//底图绘制; e* ~6 Z+ _4 @9 h
- g.setColor(Color.BLACK);
& c- z X7 F E3 G8 r4 k: B. ]6 [ - g.fillRect(0, 0, 400, 400);& e- r0 [2 X1 y N0 O2 }( Y, F
- }
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( ~2 q- u4 t0 I& b5 {. I- db = (g) => {//上层绘制6 h3 @% B. e6 d- |- k* B
- g.setColor(Color.WHITE);# ^$ N( L( R- q3 R% k' @' Y
- g.fillRect(0, 0, 400, 400);
4 V' H E6 ]- Q) I+ F+ q) T3 @ - g.setColor(Color.RED);$ Z1 C) t# i0 A! W ^' J
- g.setFont(font0);
" N- P3 B1 W7 i$ `* q4 u' n' x - let str = "晴纱是男娘";
% J' i1 I, G4 A, Q, z$ } - let ww = 400;
( \5 S6 v6 h `3 c; F, L% o - let w = getW(str, font0);
4 X! P7 z# @# o1 w - g.drawString(str, ww / 2 - w / 2, 200);$ I. K4 U+ t% o. ^: \ C1 H
- }
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- const mat = new Matrices();
+ q: P5 ^/ ?0 z9 @ d% g - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
. e! d+ F8 D8 e - let info = {
0 V3 {* i$ X) A" M( e - ctx: ctx,5 E' ^1 l- A( J3 E
- isTrain: false,6 K2 \' c. Z0 m7 s
- matrices: [mat],3 ?% L: O; B( S
- texture: [400, 400],9 x( _9 y/ f& e) U
- model: {
9 I0 T2 N# A5 ]1 D - renderType: "light",
- S/ Q' Z+ f% ~% T - size: [1, 1],/ W; u* b/ m8 J. o
- uvSize: [1, 1]
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- }
2 m5 f4 c. p( j! Q1 }- C6 n5 s - let f = new Face(info);
' r9 i/ @6 q9 m9 R# D8 ?; J - state.f = f;! A0 x; ?& j2 A/ g8 |3 u# y9 R
- - c1 Z8 ? q% s2 T7 @( W" M4 M
- let t = f.texture;
1 h# _: r3 q1 |6 o/ H& c' I; f, q6 K - let g = t.graphics;, F1 Q4 H; x. [
- state.running = true;0 d2 t3 j- w1 \6 G" X
- let fps = 24;
9 Y1 N' L% g9 f' e! M; f+ m - da(g);//绘制底图7 z4 X4 f3 x& R3 |7 K
- t.upload();" H9 G: O- N3 |( E T7 W# _
- let k = 0;
) f/ p5 j, R7 ] - let ti = Date.now();
( q) o Y% g$ @. R( n! P2 ^ - let rt = 0;; R+ Z9 c' o- e
- smooth = (k, v) => {// 平滑变化6 u* X, C( ]1 d; I2 h) V; D/ M
- if (v > k) return k;4 w8 w5 C$ W$ i# T: x; m$ z' p2 B! F6 S
- if (k < 0) return 0;4 }8 M! Q k8 @. @4 p; g& z
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# z4 }; y2 e3 V
- }
5 Z! k- g2 K- u& _. \ - run = () => {// 新线程
2 ?( f, E9 ]1 \! ]6 I - let id = Thread.currentThread().getId();
5 y, }# V6 p% i2 k y4 q. o$ v - print("Thread start:" + id);
: n D# U6 }# t- ]0 O - while (state.running) {
# h& n* ]: d8 e - try {# A+ ?1 G' k- u6 @' U$ N- Z
- k += (Date.now() - ti) / 1000 * 0.2;! v3 t1 @- x% _; H, x$ n' s
- ti = Date.now();
7 P/ r. k3 R( F5 a; x" O& | - if (k > 1.5) {
2 F! G+ |( c% s u& L% B( n8 h. h - k = 0;
! Q+ k& {$ g+ C& }! a - }
( @6 R" `2 Q6 u- U P - setComp(g, 1);1 Z. B; E, }$ p. ~9 ?3 S9 F2 C
- da(g);7 D8 |2 X4 b0 H/ d( _7 N
- let kk = smooth(1, k);//平滑切换透明度
: ~ x& |* b# m) F" c2 U8 p - setComp(g, kk);5 F. k( v# B3 B1 q" M. B- h
- db(g);
( e% t3 t! K5 k: V' X - t.upload();
: j' W) o/ e. C - ctx.setDebugInfo("rt" ,Date.now() - ti);
s n6 f( \1 i4 r: T4 c - ctx.setDebugInfo("k", k);
) o4 r9 m/ y1 f9 B. U3 _7 j; u - ctx.setDebugInfo("sm", kk);
3 z% z, H1 e3 T - rt = Date.now() - ti;! s( {3 v$ Q2 H" Y% Y
- Thread.sleep(ck(rt - 1000 / fps));
4 c; z; s, g: f, |& U - ctx.setDebugInfo("error", 0)
Z9 V* z- F. i( y4 u& \. w: ~% A - } catch (e) {
; N/ k2 B; }0 r T. ? - ctx.setDebugInfo("error", e);
: ` B: l" @$ B - } U* y! ~6 r W6 m* U) }
- }* H; T% X# [. Q; E* k- b- K M
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
$ {( t" E4 k2 D* Y - th.start();
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: \( v4 Z' d0 ~8 M7 L- function render(ctx, state, entity) {
! g8 j4 P/ T0 E/ b4 }0 {0 X - state.f.tick();
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3 [4 p g1 {3 t" n: G- function dispose(ctx, state, entity) {8 K; X% s1 n2 ?/ C% w' W2 b
- print("Dispose");: S1 T# G( w+ @( x" T0 g- R; e$ S
- state.running = false;
L; H! E) [7 `# U - state.f.close();. T a% @( p# Z9 i1 _
- }
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- function setComp(g, value) {. G# D4 m( W( g& M0 J
- g.setComposite(AlphaComposite.SrcOver.derive(value));
6 l+ n) w8 D) b9 y8 Y0 q - }
复制代码 , e: P: L- v8 l( e E% n3 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。2 P7 v/ \8 T; `2 J3 V' g0 P
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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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