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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。$ E5 ~2 X, o8 g8 y" ~
- importPackage (java.lang);. C E1 N4 f& s- h5 U
- importPackage (java.awt);1 u! W" ]1 S( m: x& o
- 5 e& `" r9 K& o3 I; S' g& u
- 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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% S$ N2 Q' H: D* u1 [- function getW(str, font) {1 m1 [6 V" u( R6 Q6 [ w
- let frc = Resources.getFontRenderContext();. C' v2 x! u9 C. J
- bounds = font.getStringBounds(str, frc); k% [; @* S0 T
- return Math.ceil(bounds.getWidth());! R& x& M4 b% U- |$ b
- }% A" c" V5 y2 \4 ^. r- m) g9 x6 j' Y
- \2 q. d& }- B7 M: ]- M
- da = (g) => {//底图绘制
8 g" Y- f Z2 r% ] - g.setColor(Color.BLACK);
6 \$ Y7 R% E/ b( F" ] F - g.fillRect(0, 0, 400, 400);
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/ X, m$ t6 Q& X, F# ?7 ?& w- db = (g) => {//上层绘制
) N1 S3 n% Z- q5 X) b8 `1 q - g.setColor(Color.WHITE);8 Y; q* m, v5 _- J! @, G: @
- g.fillRect(0, 0, 400, 400);; J; R( u4 q- v4 B
- g.setColor(Color.RED);/ s( Q( F& Y% ]
- g.setFont(font0);0 s+ N; p ~3 {3 p! h( e
- let str = "晴纱是男娘";1 T, Y2 g0 g7 h5 z: {: u9 ^
- let ww = 400;
1 A3 c6 J( d2 T+ @ - let w = getW(str, font0);
/ g7 O9 g" Y! k+ y6 h. Q& D p. B1 m - g.drawString(str, ww / 2 - w / 2, 200);
0 k8 f/ s" `9 M$ ]* u. B- {# k - }
' @9 o1 {. F" u, x! c B; {
7 R1 b! t9 W% D- const mat = new Matrices();. l- ]" w! t0 X2 m
- mat.translate(0, 0.5, 0);, W0 B+ y2 t, `# i/ ~' R5 f0 g+ d
- y) B: P/ Y+ S3 {+ Z* U7 ?
- function create(ctx, state, entity) {
: H# O- f; l. v) O- y* I - let info = {5 z3 e$ t8 Z4 N; @7 S
- ctx: ctx,' Q x6 o- P2 d
- isTrain: false,
* e4 H9 q6 J! c+ z' X: _ - matrices: [mat],
$ \: s! J! O8 I0 r9 ~& Y7 f - texture: [400, 400],2 h3 x9 ~! e! x; S
- model: {
6 [" J4 v- j9 L8 q: B' X2 ^ - renderType: "light",
7 H: f; P; I, C `: H% r - size: [1, 1],! f' _7 G+ r/ i- I
- uvSize: [1, 1]
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- let f = new Face(info);
& O2 K) n) d3 v$ }& u - state.f = f;( O1 R; J+ S, t. V* N5 o" [
5 t% G& G- z$ M' z8 b$ O) q! I- let t = f.texture;
8 C4 O, c+ H) H( z; Y0 x. K2 O - let g = t.graphics;5 [" \0 z1 ?3 X1 Y& V
- state.running = true;
# ^1 A- ^) `+ g! H- s! K - let fps = 24;
) f) s1 C, R0 k1 k - da(g);//绘制底图# g* p7 S# w9 O: Y; E. t, Z7 }
- t.upload();
3 J ~' c7 c4 L8 Y. f! [7 e - let k = 0;
3 _1 \, Z8 F$ T7 {4 C2 z+ |" u - let ti = Date.now();5 P3 ]! h6 u e6 R# R. p3 ^/ n
- let rt = 0;6 r( h3 m; \8 i) M- X
- smooth = (k, v) => {// 平滑变化
6 Y9 q B* o' ?( M/ [2 U; t - if (v > k) return k;
: ]. `1 @ R: K( l" ? - if (k < 0) return 0;
3 S1 [+ q) v2 q. ~9 r3 | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" m! \% R* C+ c7 f
- }
" C+ S- o) I; v - run = () => {// 新线程
, N4 |8 e) U: R6 i; L8 } I - let id = Thread.currentThread().getId();6 {2 |* {( L- I/ r
- print("Thread start:" + id); o/ U( Z$ F8 W6 K8 n- a" F
- while (state.running) {7 B) K' T) B, D$ ?2 x
- try {% h$ o* H3 g Q) _, T8 y
- k += (Date.now() - ti) / 1000 * 0.2;+ `7 }3 V2 G/ p; C% d
- ti = Date.now();
- C k& R6 ~. A- x4 f5 Z% L! s - if (k > 1.5) {* S0 X5 ?7 g/ A( x) [* ?3 Z6 l6 V
- k = 0;6 a7 \) `% H. p% J
- }
4 K) t& |$ e9 n) O& L. K* q - setComp(g, 1);4 L6 ]. E) P- M6 B& g
- da(g);
& w) t. D* \+ h1 W6 a. n; Q - let kk = smooth(1, k);//平滑切换透明度
) {" r' p, H: ] - setComp(g, kk);: E, e# Z* _9 G6 R) F
- db(g);8 e9 N D$ w% J$ g) B* \
- t.upload();) ~; U1 a& x( X
- ctx.setDebugInfo("rt" ,Date.now() - ti);, _& \! D7 l! a& n! w6 R, y4 |0 ?
- ctx.setDebugInfo("k", k);
8 U: W& C+ b8 k/ D9 _" q, }' n - ctx.setDebugInfo("sm", kk);
6 \* h5 N8 w- k0 n V& Y/ r2 K - rt = Date.now() - ti;
! @- `- v: r' s& O - Thread.sleep(ck(rt - 1000 / fps));
& x# \! O& v6 R; h3 Z - ctx.setDebugInfo("error", 0)6 l5 R0 V+ b8 e- Y7 A& p
- } catch (e) {
! d4 W+ Y7 ?, q0 w o7 G! r$ q - ctx.setDebugInfo("error", e);
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- }9 k6 Q2 Y# w2 U- c, w5 d; M3 a/ b
- print("Thread end:" + id);
8 `2 E! e5 I9 Y/ M$ P* r - }
7 J% `7 L! ?" F) |4 } - let th = new Thread(run, "qiehuan");
: Z) J+ C* _, D- p( J+ w5 m4 R - th.start();9 B% F& p' [7 r
- }, J0 C9 I1 c: i9 d* U L: |
- ! |6 D n0 |1 W& F
- function render(ctx, state, entity) {
2 u7 h3 G+ j% m7 E L4 X z) w - state.f.tick();
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- 7 u1 g1 e0 A. t% C
- function dispose(ctx, state, entity) {1 s, H, C ]+ w
- print("Dispose");
/ K: V( N+ r; s6 u2 K. }9 S7 u - state.running = false;
4 _5 Z( ^' e. z8 { - state.f.close();
3 v! C/ ]' {5 N8 [$ _, Q3 Y9 F* L - }
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$ _3 ]9 ], f: R* S; E: O- function setComp(g, value) {5 ?* d- R. P( o: ~7 X8 f
- g.setComposite(AlphaComposite.SrcOver.derive(value));' ?8 t d- E$ C; L: _8 s
- }
复制代码
7 b, ~/ a# @) K0 @' o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。* A% x: h, _5 U0 @$ t( Z
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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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