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3 c1 m; M1 ^ U% h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。
9 e8 P* `7 C9 C- importPackage (java.lang);
& _- n0 D+ U4 F! V2 D% A - importPackage (java.awt);$ T" E. N6 a4 j2 D. Z+ n) S# ^
- L; |' i+ _$ R' L5 s- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- w7 p3 D. @4 l3 l: |8 i2 b* h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ a% e- `- @7 u$ N" Q& s) D# ?
- 3 j: R% x) M& `" p8 f
- function getW(str, font) {5 m+ }! b' F5 r+ M" a" i1 b
- let frc = Resources.getFontRenderContext();- m- J7 q' g- C1 X9 {" f" x+ t
- bounds = font.getStringBounds(str, frc);, n4 B( Z2 Y6 }5 G L6 y$ `- r
- return Math.ceil(bounds.getWidth());
. w% n. y$ r9 S2 J - }
8 d S- U& o( {. y2 p - 9 E$ @( r; h" o, w
- da = (g) => {//底图绘制
, `6 a, a6 [; P' r9 Y) [) \ - g.setColor(Color.BLACK);
7 \' r0 w8 X& A$ ^) M% W - g.fillRect(0, 0, 400, 400);9 m: r4 [& _8 F2 X% L7 Y& `
- }
8 O- z( L5 x+ _$ c4 L5 P3 @ - # ~2 } y! R+ b
- db = (g) => {//上层绘制
+ d6 |; A5 G# f: _- J/ h" o - g.setColor(Color.WHITE);
; j M$ P6 I9 `/ t9 Y* R+ h$ ]* n - g.fillRect(0, 0, 400, 400);% y) E3 J6 o. c3 O
- g.setColor(Color.RED);
|% U) s$ o" I @ Y+ j# E - g.setFont(font0);' V1 D6 K5 z) g8 C8 O
- let str = "晴纱是男娘";
1 f; u' L/ U8 I, k - let ww = 400;5 R6 M! O; u, m2 m
- let w = getW(str, font0);. C7 S) K6 a% r+ c
- g.drawString(str, ww / 2 - w / 2, 200);
2 f0 x7 [& O0 C4 J8 u6 S6 z - }
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- const mat = new Matrices();
& o: y# ~- ~' l) X - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
* J. P$ P) G Y% A: K - let info = {/ R' Z/ R0 Z6 p* t- m
- ctx: ctx,- S! u: \& d9 S* Q& _$ u% n* H
- isTrain: false,+ ]* w8 L: R5 J: i9 O
- matrices: [mat],
" c, t7 W* t' {7 V: T4 Q - texture: [400, 400],
0 e" E# `. Y: r; ~6 v - model: {
. d6 N% @, O: C6 g. q; y8 H k, t - renderType: "light",# _* o% d6 F/ R8 k2 S7 l
- size: [1, 1],& x* s8 R |* j2 y
- uvSize: [1, 1]
- \* L7 ^" ]8 D e3 p5 O - }
4 J& M" A+ u% q* |3 s4 M - }
. R* l+ F, E- U/ ]4 b g - let f = new Face(info);- Q, d3 X: O4 N: O
- state.f = f;
! V: W. k& U Y - ' [3 ^9 G6 _; I: o' J I
- let t = f.texture;
9 J& L$ k9 |9 O: L8 c5 I& L9 Y - let g = t.graphics; K1 E$ V! n, @6 F
- state.running = true;
5 V" y1 {9 C+ r. L+ S - let fps = 24;
' F& u3 y* v* T$ [3 d1 _ - da(g);//绘制底图
; S3 H( b1 d3 Q% D1 L. Q; ^ - t.upload();1 H i: x5 f) P
- let k = 0;
0 t* q2 R) i1 s* r8 o4 x - let ti = Date.now();
8 |: g4 q: M- \; A' Z) ` - let rt = 0;
+ S: N3 R! x6 @: B - smooth = (k, v) => {// 平滑变化
& ]: _5 C9 H1 w2 S - if (v > k) return k;) h4 i: g- {8 C% H, W; l8 L1 c5 p
- if (k < 0) return 0;: F9 b! t m4 C2 F! C. ^) A( M
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 }: [& T- K0 I0 \! M - }
7 D; ?8 z& ?+ w1 ~2 E3 E& A, _0 o - run = () => {// 新线程; q" n' D$ t4 a1 H# c7 w
- let id = Thread.currentThread().getId();
! A' \3 b6 u: L! p+ R9 v6 d* `0 m0 J - print("Thread start:" + id);
9 k- X; L; A2 \7 e4 X2 l R - while (state.running) {( w: R, ?" d- }* S
- try {
/ ?' g8 }. n, F7 L - k += (Date.now() - ti) / 1000 * 0.2;
/ v1 g s; E2 y8 `7 a O0 U+ A - ti = Date.now();" _ _! l- T" f0 }
- if (k > 1.5) {
3 v" }2 r8 V; F - k = 0;8 X; N* h! ?$ K7 w; B
- }
: F0 f$ M2 o; p& s, ? - setComp(g, 1);( K3 z' g) ?4 e+ o+ F; k" k3 l
- da(g);
* C5 _7 D) t- N S3 @ - let kk = smooth(1, k);//平滑切换透明度
4 P9 @ V9 ]' y/ J C) q - setComp(g, kk);5 Z$ p7 x1 ?' I' {- j
- db(g);% R/ I( d1 e) M; \
- t.upload();
% W& A6 O& C" `1 _7 j4 Q, X% H - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 F, ?) R3 I( D* Y - ctx.setDebugInfo("k", k);% S: w; u2 Q- t$ m+ i4 |
- ctx.setDebugInfo("sm", kk);
, {9 m+ q: `! M5 ^ - rt = Date.now() - ti;% G7 X2 p5 i$ ^6 N" `( v
- Thread.sleep(ck(rt - 1000 / fps));
$ r' l- ? n: t, w2 ]1 e - ctx.setDebugInfo("error", 0)
8 D) a' `4 M _' s/ o4 M! {$ p" y - } catch (e) {
, ^% ~) q+ u3 W$ J - ctx.setDebugInfo("error", e);# O% @4 o- Y8 t
- } }' v! |3 x5 w
- }
- l, a7 J. W' M% c - print("Thread end:" + id);" K5 d" g% F. I. |( _7 X0 f2 i- Z, w
- }* D n' i) [) s3 |& v1 [7 ?
- let th = new Thread(run, "qiehuan");
/ J- D8 x* ]7 A( \9 @: J) o - th.start();
* }9 W4 m) b- K* z. y - }
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- function render(ctx, state, entity) { L) ^" t# M2 l' T( w9 @* o
- state.f.tick();4 I' }) i$ S0 |5 u5 m
- }4 T: I5 Z' F; j. v: v& J, Q) Z
- ; }5 t% y( u' `
- function dispose(ctx, state, entity) {
2 p' N G% j% {# }% j7 l8 Z5 i - print("Dispose");
+ ~3 D& }& q( t - state.running = false;% m, s% k# O8 }; E8 H
- state.f.close();
7 L; Q3 I/ U$ E6 d: c& f# r - }
2 g. Z- a+ G0 l7 {, ^
5 @/ w2 ~$ G* e2 b- function setComp(g, value) {. i* ~1 n$ T7 l1 y. s
- g.setComposite(AlphaComposite.SrcOver.derive(value));
- L3 `9 [/ c. q: v4 P1 i; r# V - }
复制代码 0 U& `, c. H" Q Z$ B
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。2 T: L! T/ _% p% Q+ e- r& A8 H. c
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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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