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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。
3 h8 P1 J7 w5 p7 P" P! G: S- importPackage (java.lang);
9 M, E7 g3 M. b4 [' \+ @ - importPackage (java.awt);9 j: x* b. s# d7 E; L; C% Z
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {+ m0 _! U l& o0 y7 O2 i4 n' m$ K
- let frc = Resources.getFontRenderContext();
$ J8 |* Y% h! Y/ }1 `5 F5 S" J - bounds = font.getStringBounds(str, frc);
5 Y5 v, a! k: {) g4 C - return Math.ceil(bounds.getWidth());
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; L7 t# B, z- c0 f& z Q. j- da = (g) => {//底图绘制! t: X+ W% p" M/ m
- g.setColor(Color.BLACK);% G; J' p. I5 }( A* L8 Q( ~6 R2 o
- g.fillRect(0, 0, 400, 400);
$ z% Z3 [( n' `/ \& X# [' R' G - }
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- db = (g) => {//上层绘制
* ^- c: w3 x" ?/ \2 V - g.setColor(Color.WHITE);
) ~+ a; c6 g1 K; X' k0 q8 u - g.fillRect(0, 0, 400, 400);
/ }0 t3 J) l" a - g.setColor(Color.RED);
3 S+ R* U2 ]* R. _8 G - g.setFont(font0);
6 y' Y( H" y6 g6 B& H$ S" P - let str = "晴纱是男娘";$ s. J8 s- O9 J" _: v9 X" u' U
- let ww = 400;
( B: ]) `0 q% @9 e/ H3 Y! g# X - let w = getW(str, font0);7 L$ f4 z* N! x; r( V) {+ P+ k
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
! ~! J6 A6 |! }+ L% r2 C - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {0 |' G) A# P; q1 r
- let info = {& X, L! @+ y& I: H5 K
- ctx: ctx,
9 J( o+ |9 Y3 S/ a! s - isTrain: false,4 {# |. v, g/ D s m6 P- \. t9 j
- matrices: [mat],
2 U6 [: Y( ~4 R! Y7 q - texture: [400, 400],, }& ?8 {0 d8 _& Q; p% I. ^ v
- model: {
# r9 V# z& H3 n9 Y1 m5 n" _ - renderType: "light",
0 }% |+ k' |3 l% @1 Q - size: [1, 1],0 P, [ |) v; j
- uvSize: [1, 1]
& m' s' v7 l! v7 d% l' S5 `* i- r - }
4 @. }3 V7 C/ Y, Z - }
/ {9 f% x' Q& Q( ]; ]" w - let f = new Face(info);* x. g4 J4 d+ c6 I7 G' w+ a
- state.f = f;
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. D4 o. V& c4 `' @5 N0 V- F- let t = f.texture;
b: J% a" L" w% u - let g = t.graphics;& g+ y x; x$ p8 j- q
- state.running = true;& ?" S) P- j+ [+ _/ z
- let fps = 24;
9 \0 E3 H# B/ x- h - da(g);//绘制底图
: ] c/ c& Q+ T1 x - t.upload();" }5 X8 \4 _4 ]' o k; w8 N
- let k = 0;, i; A+ a$ l/ H8 i5 X
- let ti = Date.now();% U6 O" t7 A2 N
- let rt = 0;/ i! N, d e8 }* B. w$ | y$ u, ]1 i( R& ]
- smooth = (k, v) => {// 平滑变化
2 g% [6 r4 C2 f% B9 m8 J - if (v > k) return k;
) D1 a" m3 O+ G7 @" ^/ f - if (k < 0) return 0;
+ Q/ c( o) }1 Y, \ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
* Y0 a. b. A. g - let id = Thread.currentThread().getId();7 f: x- w4 u1 ]' A# o4 |" D; n+ }. [
- print("Thread start:" + id);6 }" O4 f) O* w3 k- `) m& f
- while (state.running) {, d5 v0 P. f) I/ v) E; z7 F% ?
- try { ]4 s5 n7 f( ~' G3 @6 ^; M6 y
- k += (Date.now() - ti) / 1000 * 0.2;
- T0 A/ S z' `9 C1 s6 l - ti = Date.now();
2 Y" p: U5 \( _. [8 J - if (k > 1.5) { a: |) |! I5 {% o0 m
- k = 0;% d% d: ^. W) m- P6 ~
- }$ Z2 v( ^- V- x3 Y$ X
- setComp(g, 1);
" r! b5 m7 a, W+ A0 C% |/ Q - da(g);
# o) ^9 z( g; b: S+ a/ r- x) t& }% `: @ - let kk = smooth(1, k);//平滑切换透明度1 m$ ^2 n. D. g. f2 k6 w
- setComp(g, kk);
: B- r @7 f' C+ F1 S5 w4 C2 ~ - db(g);: ]2 z/ A9 a! b
- t.upload();
+ }( {1 D& d# J: e3 S& x - ctx.setDebugInfo("rt" ,Date.now() - ti);
$ `3 ]9 ^* R7 { Q3 P - ctx.setDebugInfo("k", k);
0 v4 t9 X, _1 T6 \1 J) o3 S7 b - ctx.setDebugInfo("sm", kk);
* i. ~4 h$ r/ [2 Z1 H* P+ I! ] - rt = Date.now() - ti;2 {1 U! L8 d, ~% B9 [" S O/ T
- Thread.sleep(ck(rt - 1000 / fps));
( @/ N+ t6 \7 e7 O: e' D+ W7 L - ctx.setDebugInfo("error", 0)" F9 A: q2 G$ r, ~
- } catch (e) {
J% H2 \* G9 i$ j - ctx.setDebugInfo("error", e);/ D+ N0 `8 j* K4 ~0 E
- }
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- print("Thread end:" + id);
1 ~1 T" |* r) N1 A g8 Q4 Z2 D - }
# j8 m! ^2 T t2 K! [' y2 i - let th = new Thread(run, "qiehuan");5 [1 i+ h( d* C5 w& }* q$ N
- th.start();
3 u8 n" O% M( B) i/ _5 G% O - }
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& q" A* L( f+ f' O, a1 E# K- function render(ctx, state, entity) {
( u* v, X" |. o' Q - state.f.tick();+ v: l; U- Y0 f0 }
- }" I! U/ }& }/ R. A: c
) X6 C: i5 X9 j: J" e4 t/ C1 W$ ~1 _- function dispose(ctx, state, entity) {6 \$ k* G5 M- P+ A
- print("Dispose");' S* h& P8 I0 P
- state.running = false;) X4 _0 X! |" y5 Y' X n
- state.f.close();
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- function setComp(g, value) {
5 s3 m% |7 J) s. B - g.setComposite(AlphaComposite.SrcOver.derive(value));2 x8 c8 q! V6 h: f8 g: n& z
- }
复制代码 , ~9 z+ a1 z6 n' n! f0 G
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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% v7 C6 s% G A9 x# \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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