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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。
, b7 i9 a$ n6 f( b# j- importPackage (java.lang);5 h8 k0 {* u1 w8 \5 a- }9 t9 F1 t
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
4 N, m$ ^- d$ }
3 F! m7 x0 F! \( W7 T6 P2 A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
0 |9 H K. y W
9 r: l. e0 t: _; |! w) V) ?, M1 ~- function getW(str, font) {
' M- k. v7 L# _5 \1 u - let frc = Resources.getFontRenderContext();
) k: n9 \& Y- G, \. p" P - bounds = font.getStringBounds(str, frc);
* D& W4 i# h/ I" O0 |) |+ b - return Math.ceil(bounds.getWidth());
- l; t# g. ^3 n3 R- W$ s! C$ U% l! _ - }
% `9 @1 H3 B4 O, S
+ Q/ W) ]2 g9 X- da = (g) => {//底图绘制1 k) x: C% B; B2 O% B, R' _' d
- g.setColor(Color.BLACK);+ `3 Q4 i/ ?9 `: l
- g.fillRect(0, 0, 400, 400);
. P# D' l( [' y+ s6 J; w% u - }
; I8 x' t# [: O) @
7 y0 J r& m6 @5 O5 [ t# B8 r; i/ y8 S- db = (g) => {//上层绘制
2 z! @2 \# C0 t& x' j - g.setColor(Color.WHITE);
4 c t4 K; D3 d" ]& b8 S8 H& e9 c - g.fillRect(0, 0, 400, 400); I+ V- ^) `; }7 a4 ~
- g.setColor(Color.RED);
3 \* Z' v" m6 Q+ s - g.setFont(font0);
2 p( T( x; _ I' q$ m6 Q - let str = "晴纱是男娘";3 g5 q& u1 O9 x) l; A1 Z# Q
- let ww = 400;
! {; C! w' [& S b - let w = getW(str, font0);
$ i0 e* E, ^+ H5 G, Y. ?( Z - g.drawString(str, ww / 2 - w / 2, 200);
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- , ]9 n0 }* u( w# F8 C- Z; C5 c
- const mat = new Matrices();
" j+ l# N* }3 }* Z - mat.translate(0, 0.5, 0);
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3 M' T7 A3 H7 z4 s4 u7 |- function create(ctx, state, entity) {
4 D/ J N2 K: y6 I: O - let info = {
4 a) ]; P' Q" C# T4 r - ctx: ctx,
9 O5 k& g4 @' P! V' w4 ] - isTrain: false,
# z$ R+ D* Q) e, T' r; ^) B - matrices: [mat],
, j0 w0 s1 a- x3 O& b& p, D( C - texture: [400, 400],
4 q; C( `. e- c! R O/ _ - model: {4 w! w: S( x `
- renderType: "light",
% J4 i# j+ o! ^( `' r5 G o - size: [1, 1],3 S/ Q8 j$ U& C% c6 j. b
- uvSize: [1, 1]* G7 M# g( y! O/ ~. H
- }
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- let f = new Face(info);9 l' f- i' D* U+ e) [
- state.f = f;( G+ W6 k) n n, z) x+ _, ^6 `" e
0 V& o7 O; [7 D6 O+ G3 X- l; M- let t = f.texture;7 x# u7 {3 Y. Q" c
- let g = t.graphics;
# G2 x' a, v# ^) v( s - state.running = true;; P+ `1 h3 i0 V4 O. X1 N
- let fps = 24;% ^2 y$ W+ s2 _ F0 I' {1 Q$ g! H* L
- da(g);//绘制底图* `7 i1 A- g# V, T: N5 c+ s' w
- t.upload();* E5 i! w; Y* p, ^+ Y
- let k = 0;" D/ N) b# n7 `0 P$ r
- let ti = Date.now();/ K$ M ]) J0 [3 B4 U" k
- let rt = 0;, N- H8 s; _" b- O) D2 J$ k& q
- smooth = (k, v) => {// 平滑变化5 U4 K% v' z) h1 @6 m9 A' p
- if (v > k) return k;4 w" y7 O( F4 D, }( l
- if (k < 0) return 0;
( a+ M9 A: H9 ~' F( u - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 e( ^- b) d4 R w. A7 r
- }$ A: i" F4 X+ D: p( Y6 V9 K
- run = () => {// 新线程" u' s1 h8 v$ k# r! T
- let id = Thread.currentThread().getId();
; `% D( |. Z4 ~ - print("Thread start:" + id);: [4 P' J% R% }+ ^' K
- while (state.running) {0 L. z ?# ~# F9 S! ]+ G% W
- try {
1 s* L' j) h% u4 l$ j6 T$ h C+ \ - k += (Date.now() - ti) / 1000 * 0.2;
: {& @$ q l4 z - ti = Date.now();
/ D P w* f9 ~- V% H - if (k > 1.5) {! d1 Q1 f5 j1 `& \ v. c
- k = 0;
$ {; k f1 |: h; q - }
9 M( r6 e. W+ ?: d5 G$ S" f) ~ - setComp(g, 1);& W6 A) y/ U: ^+ ] k
- da(g);4 J0 |" r/ q8 r( l! d7 q" |! u
- let kk = smooth(1, k);//平滑切换透明度" B2 n9 i3 k& O6 b' ^4 B/ x1 e& |
- setComp(g, kk);
" M9 o, S# @ a5 @ - db(g);
+ ]* I% C0 c1 k - t.upload();
; N' A. [) L4 k$ H' x - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 i; I- [; @/ G1 o4 n - ctx.setDebugInfo("k", k);
4 D7 ?' V) r8 H' c2 X - ctx.setDebugInfo("sm", kk);
2 c7 A D* m% b. f) f - rt = Date.now() - ti;
, |' g2 i* M& z S! Y4 v8 V- l& q - Thread.sleep(ck(rt - 1000 / fps));
, O/ [0 y1 r8 I) |3 G: A* ]+ r - ctx.setDebugInfo("error", 0)' ?6 l1 `8 k: L% w/ `9 z
- } catch (e) {
$ J) J1 E8 X! F4 l - ctx.setDebugInfo("error", e);* C- ]! V7 e! J5 u
- }
; r0 u, D" y4 I8 h' f* `0 {/ w& ` - }
$ i( S8 }) A0 s1 c9 t2 @ - print("Thread end:" + id);6 j3 `) [' ]3 J
- }8 N# M5 \/ c7 M+ Z8 D* _
- let th = new Thread(run, "qiehuan");
3 I/ s7 |# N. L% K/ i' `" D: { - th.start();: S e% R, q8 ~. Q$ b
- }4 _* `' N+ g( k: I0 k
! `1 Q+ o z- _. A- function render(ctx, state, entity) {/ t2 D9 \( Z8 j/ H
- state.f.tick();
+ f" P8 y% g% l! t7 s- G! H5 I# x8 V - }
) [& ]6 {) a/ M; p
5 X: K/ u9 Z# ]) {; N6 k9 ]5 m- function dispose(ctx, state, entity) {6 B$ n* p1 k6 e# { V% K E. C
- print("Dispose");# @( w* P4 h, S0 v# o: }! a9 I% {6 p
- state.running = false;
. p+ ?( A) x. Q7 d2 B6 l% @ - state.f.close();9 N3 e; D4 Y4 ]; U4 |( B% U! G
- }
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, Q4 X# ]& N! G. K d% ~- function setComp(g, value) {) t' U8 }! U- G% S* R
- g.setComposite(AlphaComposite.SrcOver.derive(value));( S' |3 C; B9 P6 ^
- }
复制代码
0 A5 v& T# M' w9 o. ~) q) I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。8 k2 S3 S" y8 J
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) u; K2 L9 I6 o( n0 K& L" S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 w+ J: d. L3 f) {* h6 b# Y/ f9 d& T; `
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