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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。
. z+ t" l2 M5 y$ k! n& z% e- importPackage (java.lang);
+ w4 h! }$ X. @) r* G6 p e - importPackage (java.awt);9 D. t7 X; d* K- @
- 8 m1 p) ~3 b* ?3 E9 ^6 n
- include(Resources.id("mtrsteamloco:library/code/face.js"));0 ?1 |( n4 s, m, `2 \4 H
' `4 p( U6 d; Y! q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
1 B2 y! P' b% g, D - " W. T" @7 W/ w6 y7 }7 ^
- function getW(str, font) {
8 Y% T9 D% u b1 ?+ ^ - let frc = Resources.getFontRenderContext();! h! M+ a* D, a! C/ _/ U
- bounds = font.getStringBounds(str, frc);! b( c! p5 r. F
- return Math.ceil(bounds.getWidth());4 {% Q4 ~- J( O* f6 \
- }
" i# }6 X& D7 y! K# P& w - - S. f2 @ [7 Q2 L) e. A5 t
- da = (g) => {//底图绘制
' v& z0 o: I2 H! ~ - g.setColor(Color.BLACK);
+ A( Q! f4 p9 Y& [- H: |. D2 _' M. ]5 _ - g.fillRect(0, 0, 400, 400);
1 t3 z g, H# [+ K" V - }( q# _% p7 f+ F5 t2 R# m2 W
- $ L7 Z; A, B4 [* o3 h
- db = (g) => {//上层绘制
8 R; a3 ]& l b* ^1 l7 ~( P - g.setColor(Color.WHITE);
$ e! D4 \- l7 ]+ l5 Q( q- a' X - g.fillRect(0, 0, 400, 400);
0 g5 ?! k- r7 `) k6 h1 C3 [ - g.setColor(Color.RED);7 K: J) I0 @6 w$ d
- g.setFont(font0);
* ^# a2 R. i# [* I( s - let str = "晴纱是男娘";6 t: Q+ U. C; _3 x/ \+ F" q
- let ww = 400;2 U) f5 n* A( i+ U0 Q3 s
- let w = getW(str, font0);5 H8 `# a& X- N8 M2 ~
- g.drawString(str, ww / 2 - w / 2, 200);
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) F* [1 q1 b" i( Y- const mat = new Matrices();4 C% {! y$ N1 o
- mat.translate(0, 0.5, 0);
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- c0 @1 T! d' s6 T$ X( [% {- function create(ctx, state, entity) {
/ l3 j: t. Q* i' q4 K2 i - let info = {
0 Z+ U8 q, h" _& m1 v3 I1 H, y - ctx: ctx,
, D6 G2 }3 H# ] - isTrain: false,
3 R9 N% V+ Z( h( M" E- y# _ - matrices: [mat],0 t& r/ T) q2 c& b/ M! z6 x
- texture: [400, 400],
' n9 u: Z% D& L - model: {
5 n- n7 ~) S9 j$ J0 a2 ^4 n - renderType: "light",
0 {' v" u& p7 V3 `7 A, }8 f ? - size: [1, 1], H' B4 _% E7 {( S% T* B \
- uvSize: [1, 1]+ j n, d \5 @2 m6 @1 o
- }5 W# _& k) F: Z0 u
- }
m5 s) w, o! S$ c - let f = new Face(info);
1 A. [7 S* ?- q: Q& O) O - state.f = f;
* {- @/ Z. F% Q) z/ p
9 k9 ~7 N- k P2 B! ~' A4 r- let t = f.texture;; Z" M1 |, X/ U' H/ j) }
- let g = t.graphics;) s( G3 X x7 T8 X, u7 F
- state.running = true;- I* y7 c% [4 s
- let fps = 24;
2 R0 S# N4 @! } - da(g);//绘制底图
! R: O, j K% X0 U1 t* i6 t* S- m - t.upload();8 c. p: j% u; h' h1 g4 `' z% Z# u
- let k = 0;" z+ c" [ y, T+ h
- let ti = Date.now();* F, }, Z$ K: g7 ?: o3 [9 y
- let rt = 0;
% `' X( W8 \# f" s! q# a - smooth = (k, v) => {// 平滑变化+ Y; c1 g; j0 j' B8 X' C2 k6 N
- if (v > k) return k;& r( r( M3 ^. H v
- if (k < 0) return 0;
* R; _/ ?) q- N% A. E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& O% z$ g, a) C+ d+ b; U% R8 b - }
9 W" G* \; c! e k; w - run = () => {// 新线程
" [6 b/ V2 L' z( | - let id = Thread.currentThread().getId();, o0 U8 ]. f1 n* h0 A# {' t6 p
- print("Thread start:" + id);% R; U/ B B. n" s4 \) V8 f2 e. x
- while (state.running) {( V9 s3 s. y ^/ |/ }( f
- try {
+ Z! G! N! A3 a% l - k += (Date.now() - ti) / 1000 * 0.2;3 R; h& D% J/ [9 o6 W0 h2 J4 k) e
- ti = Date.now();: Y6 g& D6 b6 [ B
- if (k > 1.5) {1 `9 k% O; d4 Y: |5 N, \
- k = 0;
9 {: J4 ]/ h1 r+ t! \' w6 h1 ^ - }" {1 F. o$ _9 e$ ]
- setComp(g, 1);
. Q, k8 m* {7 K, J! X% o - da(g);
9 Y6 @" i' U& h* t; i4 _ - let kk = smooth(1, k);//平滑切换透明度) H0 _( w3 A+ `
- setComp(g, kk);
& g4 H% J* Q, Y - db(g);" v, d; h* L3 W! p
- t.upload();& r, Z5 A) R# Z
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 C1 V0 I6 I2 p1 u1 V - ctx.setDebugInfo("k", k);
1 ~+ G; b# ^* t - ctx.setDebugInfo("sm", kk);+ C$ w9 P4 O6 A2 U9 ~7 ?
- rt = Date.now() - ti;3 j' R+ W; ?! o* V* K( F
- Thread.sleep(ck(rt - 1000 / fps));' S- K8 y) J- W, ?, U8 w( u1 K
- ctx.setDebugInfo("error", 0)9 U# D& J2 N& g+ a! D3 p
- } catch (e) {3 I8 [& a" A! ?; _1 K
- ctx.setDebugInfo("error", e);
+ G: M$ e u k; j9 z. U4 u0 X7 B- q/ \ - }9 i4 p% z' D* |) ]- `8 t
- }
. M b0 g5 |7 C6 n { W - print("Thread end:" + id);
. S; v0 D" G3 B3 e: v1 ~7 I# ~( v - }" F, [" v/ a k9 f9 ]% ]/ T( m. H
- let th = new Thread(run, "qiehuan");# W+ E6 s. j8 |" F/ E
- th.start();) w7 t' c1 i* T0 C8 ^
- }* c, ], l4 s7 p* X' I
% l4 W o# d, Q- function render(ctx, state, entity) {2 G. \2 X7 _3 A+ g, F
- state.f.tick();
' D# { p6 ^ Q4 G - }
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- function dispose(ctx, state, entity) {
8 T1 v1 M# T% U7 ]0 e" a @: C - print("Dispose");
0 p7 ~5 |+ s" d% ]: j - state.running = false;% _ T- ?" x! q
- state.f.close();
6 S6 u& E2 K& i+ n+ D2 D c, H$ E0 P+ S, c - }: S6 ]+ O S$ @
) f. B2 d. ^. K6 S. z- c, _/ O* {- function setComp(g, value) {: S5 K/ J3 s9 V: H$ R1 z$ Z
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 f) ?4 ^/ D6 y5 }. O. R - }
复制代码 2 K5 G* Q9 p& E. F1 G) ?6 i6 a6 d ~
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。- z9 l+ G& e4 f1 C' @" k: M0 }
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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)5 w$ d. @9 ]& i5 V9 b8 |8 g
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