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! T2 X. J l4 C# Z9 M& L8 P+ Z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。
2 {7 h8 `6 M8 h- importPackage (java.lang);
! ^* n# c( J: C - importPackage (java.awt);5 `5 m# Z! L* `% x
- : f L- P7 A! g ]- \. e8 u
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 M3 m, O- F5 K9 f$ V$ z6 s- m
- ' `5 ^ G. `$ H6 t
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, j- o' Y- }4 Y' B
- * \0 `# O/ L$ V% C
- function getW(str, font) {) e$ K& O2 n j) P+ ~2 [1 `* e
- let frc = Resources.getFontRenderContext();
' A+ S4 s- o, w1 k' I- z - bounds = font.getStringBounds(str, frc);. }& `5 y" H3 x+ w
- return Math.ceil(bounds.getWidth());
/ M0 R6 L2 J6 i2 v/ X - }9 L9 K. ]5 C3 Y$ s
- # R) u; V) S( c% s
- da = (g) => {//底图绘制
8 H. h! l* @3 x* X - g.setColor(Color.BLACK);
: K1 b+ g! w. z* E8 K0 I7 ] - g.fillRect(0, 0, 400, 400);; X+ U; g6 T. @; K$ b( S3 U
- }( ]4 _6 S* f( t9 |& t3 z
- 7 k) o4 q+ a6 R& l8 G
- db = (g) => {//上层绘制
7 q1 B7 K- U, Y1 R - g.setColor(Color.WHITE);! u3 |( n! L! L! \( T' [ {; K. f
- g.fillRect(0, 0, 400, 400);. z! E( _9 R( y
- g.setColor(Color.RED);
1 W( d: I7 r: T5 `8 n* j - g.setFont(font0);
; k. K8 X8 x+ [- O - let str = "晴纱是男娘";
3 R( K# c1 |) }# Q; ^ - let ww = 400;$ Z$ D8 F+ {) @4 ^4 E# e
- let w = getW(str, font0);8 H2 o. ^- Z; V
- g.drawString(str, ww / 2 - w / 2, 200);
9 r8 R6 V3 h! p- F - }
+ |7 z% j4 h' @: f1 L
1 K( C0 f3 y; _0 U. `" v- const mat = new Matrices();: W$ l j; w+ c0 i# m' M
- mat.translate(0, 0.5, 0);6 o1 @' V- _2 b4 a# B5 L9 _
8 ]7 `, X3 y' M- h* q- function create(ctx, state, entity) {9 t3 S% \) G! c# Q- V
- let info = {/ w8 ?, N# ^ R6 x, c$ U/ ?
- ctx: ctx,
" Y1 l. w5 h+ G7 F. i3 z3 q - isTrain: false,/ P" c: c" p; K( t: F5 u. G
- matrices: [mat],
5 P, i: V3 ` U% j \) T5 m- W - texture: [400, 400],
- Y; ]' c; A8 L2 F# V - model: {: d" ^0 I0 @+ O3 E3 B
- renderType: "light",
1 c6 t) y# c& Q, o - size: [1, 1],+ b% H2 N6 f! I6 J: R) G' Y& s
- uvSize: [1, 1]# }- D A6 G/ j0 r" A: ~/ J
- }
8 F- d* x' B% u( @2 R - }2 g: B! O# F7 ?& H* n: b. k. G
- let f = new Face(info);
I) V" O" a( O - state.f = f;
& B5 @! O; B+ \3 H- E
! L3 M, ]3 |. G- z( v- let t = f.texture;
# N7 Z; W6 G/ l% e: L# } - let g = t.graphics;
% l6 `4 X, _# q. B - state.running = true;1 y \/ Z0 j$ I
- let fps = 24;) P$ x+ K$ h- F- h$ f) E
- da(g);//绘制底图/ @, w4 W3 ~( T5 m3 O( S- u
- t.upload();
* Z! r% K) ?% \, b& A; c - let k = 0;5 Z8 Q7 K# G- C0 f; ?) m
- let ti = Date.now();
" \! b, }0 s7 ] - let rt = 0;
0 P$ O5 w! {. l2 i - smooth = (k, v) => {// 平滑变化2 N1 x, e& d! [5 _* D8 ^ c/ F, [
- if (v > k) return k;
, l# `9 O" X7 n - if (k < 0) return 0;
! f5 [/ Z7 N( K0 X' x u - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 G9 @1 G0 J: @; S
- }/ Y2 f) g3 L1 A% w( t, _
- run = () => {// 新线程) C) |1 i* V( P4 Q$ w
- let id = Thread.currentThread().getId();% y" t) d! n+ `! S* d! h G9 |
- print("Thread start:" + id);% [) F0 v5 [3 J) T$ Q
- while (state.running) {
" O' x' v( X- J; U - try {
: w$ p# V& ~8 k# n# _ - k += (Date.now() - ti) / 1000 * 0.2;" v) P( ~9 E, P8 o$ Y1 d! \
- ti = Date.now(); p" [4 V+ p: z
- if (k > 1.5) {/ I1 ]2 A8 ~! Z% C4 L& y
- k = 0;
2 N/ L. |- T0 h' @6 ?5 K3 z8 N S& ^ - }8 X" V8 A( e. G; }! |
- setComp(g, 1);5 j. c& Q' x9 O+ f
- da(g);: ~: A! v% _0 |0 z. p6 M# f
- let kk = smooth(1, k);//平滑切换透明度9 {9 K3 ^3 h5 L S1 s0 L, m
- setComp(g, kk);( F( A. e% u, N7 l% a( n4 v
- db(g);3 {% m/ G; S/ ?
- t.upload();3 F# X- j" V4 \% J
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( j" G' O) _6 j+ p3 p$ k1 P - ctx.setDebugInfo("k", k);
; |6 D) U; F- r2 f - ctx.setDebugInfo("sm", kk);& U% |5 D7 r8 F8 F! A
- rt = Date.now() - ti;% n: w( F) J. s5 Z4 ]6 x* i& X
- Thread.sleep(ck(rt - 1000 / fps));
U- v/ M, W# ~; N" k - ctx.setDebugInfo("error", 0)
& j. ^$ z5 O' r' C3 t - } catch (e) {
* S2 Z4 H0 D4 L& T9 X( j" w - ctx.setDebugInfo("error", e);2 Q" V0 s- N$ h S
- }9 k D3 T" e8 x' D! p$ H- e1 T
- }! e2 A) a7 Y' b6 \* f; v3 `* J2 q) N7 O$ C
- print("Thread end:" + id);& q5 W( ]2 s# {) o. v1 k6 a
- }
X! u4 v4 F# b# _, A( h9 B, D0 i - let th = new Thread(run, "qiehuan");3 p2 J' H4 {0 ?, U4 ~! b2 O+ N; w
- th.start();) A, o. D; }; o, C# G/ h* N- t
- }; G; X" s0 a/ m- @6 M
- 3 U5 y2 s- O6 O& b! L6 P
- function render(ctx, state, entity) {9 h. b0 i4 j( Y
- state.f.tick();
: Q6 |8 U x0 [1 u. z, M' Q( f - }, ?. ] |3 M* U
- 1 E: T& u4 q0 J! ~" ^% ?2 j
- function dispose(ctx, state, entity) {
9 T$ h& j3 F y8 x. M - print("Dispose");4 L- r0 \- W# W
- state.running = false;
; i( ~4 b$ x) ` j* A; ]' l6 D - state.f.close();7 M3 s( Z8 X) X/ \) V) j
- }0 c0 f' Y9 @2 f7 V' _
7 ^' L7 v. D- g1 Y+ F% u- function setComp(g, value) {1 g( W9 y* _# r/ Q4 \& t- Y$ Y! w/ t
- g.setComposite(AlphaComposite.SrcOver.derive(value));- T: t* Q5 W7 v8 G
- }
复制代码
' {* _/ {4 e' A. D. P8 \: ?+ w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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$ Y9 V, v) A& t, ?, ` D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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