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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。
" c7 K0 x9 ?5 \+ b- C- importPackage (java.lang);
+ H. ?2 _; B# ? - importPackage (java.awt);- g# `& `2 ?, s' k* T
- ! L$ V" ]: u0 O- O6 v J
- include(Resources.id("mtrsteamloco:library/code/face.js"));9 x% i) V3 C& [. A( v
) I- t1 g; T' I. l$ p7 b- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
5 j5 H7 r- \( d8 I/ P% }0 N* M - 0 F% O1 b' y: ~% d; r
- function getW(str, font) {; f4 L. s6 {1 \
- let frc = Resources.getFontRenderContext();
9 p6 q: {0 s/ ~9 ] - bounds = font.getStringBounds(str, frc);' H' g) y4 p- B. `6 X) C
- return Math.ceil(bounds.getWidth());
+ W9 z$ ~' {8 _; | - }
8 ^# c( \" w2 h# f* |* E& k
2 p6 j1 f4 g. ^- `) `0 |- da = (g) => {//底图绘制
% n5 o3 O, O1 c - g.setColor(Color.BLACK);; \8 p& Q1 @) |# _/ N* _
- g.fillRect(0, 0, 400, 400);7 W6 r% G# U# c
- }
7 a4 Z \- |. v4 s# n& C
; b0 b" }# p# ?2 q+ g( T/ h- db = (g) => {//上层绘制+ o! A5 n s4 v
- g.setColor(Color.WHITE);
1 B, O5 F, s3 q9 a, a$ D. g - g.fillRect(0, 0, 400, 400);
" z9 K/ {1 a" \6 N1 ?/ r - g.setColor(Color.RED);& N- z$ j0 L5 W1 u' i+ N
- g.setFont(font0);3 z8 K+ R. r0 F! D( N& C+ @" n# D
- let str = "晴纱是男娘";$ t" t* t' r4 b$ I8 F" E
- let ww = 400;
9 W- I4 R- H3 ]; ~( ]/ a - let w = getW(str, font0);
/ a! `1 @" M: A - g.drawString(str, ww / 2 - w / 2, 200);
4 A- y) _6 W! A' ^ - }
% X+ [# y+ p! o' k" H. B' V - 1 V8 P- a1 X$ Y! m' M
- const mat = new Matrices();
2 W6 E7 p# i3 ^8 t1 w6 R# g - mat.translate(0, 0.5, 0);, X: g* n- u3 l. g
# o. |" t+ L2 k) p- l8 O( R5 {- function create(ctx, state, entity) {% u6 u9 R0 q. B, {& H/ ~
- let info = {9 C+ U- i# j7 x8 V, B8 I
- ctx: ctx,
$ s/ Q n! O8 }( [3 K6 e2 x - isTrain: false,
, C+ R9 s$ N2 W6 g. q2 X, y - matrices: [mat],
& P& `5 j4 |3 k) k. @5 s - texture: [400, 400],0 Q3 X, h. ~3 q1 `
- model: {
" c6 ]% |' p( `0 G - renderType: "light",2 w. u0 B' r* A% x# l
- size: [1, 1],+ v. k& }9 z, @/ t! e$ s/ [
- uvSize: [1, 1]# U# C* X3 I9 @5 r6 l: n( z
- }2 O- l; P y/ |
- }/ l4 c6 t$ ?& ^) J/ I$ k: _) X
- let f = new Face(info);
; i) ^/ z! ~, x9 j: v7 T - state.f = f;
' @1 A5 C% V7 R- ^2 ~9 k( l
% F& z' K+ [9 l( T1 b: U! f- let t = f.texture;* G. B6 L Q$ c
- let g = t.graphics;' ^ v3 W! m D, Z
- state.running = true;
R) D9 N! j F+ y; o - let fps = 24;2 |4 B7 k( H: y, ?* [" R( M: O/ C
- da(g);//绘制底图
- b v( z# d1 e& V7 x - t.upload();
3 R+ n& C7 }+ F# r - let k = 0;6 M& B2 }/ j. Z) Y& ]" o' l
- let ti = Date.now();
6 K/ R2 @2 g: U9 ]; t - let rt = 0;6 X# u8 T0 }2 C' M, `! g
- smooth = (k, v) => {// 平滑变化
6 Z+ S/ {# ^5 T: j) ?. ` - if (v > k) return k;
8 @8 [3 j) J4 Q. Z) z$ \2 }1 l - if (k < 0) return 0;
?9 f8 t4 ]. C, v0 j$ e+ S' \- b - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ G9 G6 y" \2 {6 z+ H - }7 N3 h. |1 A& u4 D6 k9 [' Z6 M- r9 ?
- run = () => {// 新线程! m0 s. Z+ O3 ~
- let id = Thread.currentThread().getId();
6 `& \( U0 J# J5 G' M; m9 Y - print("Thread start:" + id);
* j4 V, f/ b/ l9 N9 k( { - while (state.running) {+ V7 Q6 u& a1 l+ `/ N: L( ^/ E
- try {. ^1 M$ y7 @1 Q8 O8 i* l
- k += (Date.now() - ti) / 1000 * 0.2;# J* Q, f0 |4 P6 n1 J6 }
- ti = Date.now();9 m: i5 X/ x& x: t
- if (k > 1.5) {$ e5 ]9 U1 V C2 d: ~8 \/ P% V
- k = 0;( W$ ?+ t0 t! ?0 @# K1 y
- }
; w7 C7 r$ ~5 F! r - setComp(g, 1);+ D6 R4 ~6 Y2 K3 b$ q* L! d. E
- da(g);
4 ? h4 ^9 ^ U. Z. l! [ - let kk = smooth(1, k);//平滑切换透明度% J4 y) j1 U9 s( n# ^
- setComp(g, kk);
" q& X) U& c; m% c/ n# Y - db(g);, g6 o1 d- _' @8 F% b5 t' N6 E
- t.upload();' K" D/ A9 w9 u$ w; O+ @) @. w9 y* V+ r
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 R" T, G' j+ G; B - ctx.setDebugInfo("k", k);
9 Q6 A: \2 V$ i" |6 h - ctx.setDebugInfo("sm", kk);
! ]7 y7 ?. }8 G3 I - rt = Date.now() - ti;7 Y; L( {7 b3 V8 h/ j
- Thread.sleep(ck(rt - 1000 / fps));( q: M+ I2 s/ Y$ k9 n
- ctx.setDebugInfo("error", 0)- d1 ~! `; v( T
- } catch (e) {
6 z3 x; j+ E) I9 k% j/ `) F* n" p+ O - ctx.setDebugInfo("error", e);
7 U$ A) S2 D: K' u - }
5 H9 h; O5 F$ c9 d9 T7 g - }$ x3 K! M; g& u! p
- print("Thread end:" + id);
4 V, i6 Z5 T* ^' X& Y2 [, x# t. M - }
5 s- B3 V7 {- p) t3 l6 e. [ - let th = new Thread(run, "qiehuan");5 [3 a+ R/ b# Z
- th.start();
9 d W5 F$ D+ ]% \" f$ n# {' O - }( G4 E3 f6 ` K- r$ A: ]
- . I, J9 B! X/ n' c! o( k
- function render(ctx, state, entity) {
( l4 \& n( b, j' @- I - state.f.tick();
! Q3 s# E: Y4 P, m) |/ B; D5 o3 j, s - }% ~# d8 B) U. S; y: I, h
) M. v& e7 ]! f- t) ~# u: ]5 M- function dispose(ctx, state, entity) {
; n' f( u8 G/ W - print("Dispose");3 t9 E! B- W" n8 t s! f& [, |% g& R
- state.running = false;; R4 ]' o; C) e" m i
- state.f.close();8 `5 B5 C) ~7 v4 D; C9 `2 b
- }
; E( X! I" Y+ z# } - 2 ~' _( K0 k0 @" {
- function setComp(g, value) {3 y9 I+ d8 }9 R
- g.setComposite(AlphaComposite.SrcOver.derive(value));
, V- [; w! e( t: b# p9 Z/ L- J - }
复制代码
0 N& o$ ^" v: o, k7 U5 z. S0 r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。/ P' b) w) Q: x
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% [, m0 P/ Z) f: n+ B, f顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% y w! A/ _5 D/ `5 ~" L
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