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9 p! j! o9 l/ j+ j/ M! o: m: b: A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。
) Y* [7 K# |! a- importPackage (java.lang);4 O' T% L" b9 C! h: B
- importPackage (java.awt);
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+ o% ?- u) L; k$ ^. T- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
/ C/ S, ]- A( a- e - 8 F) o+ z7 G( [+ O! c$ I2 ~
- function getW(str, font) { `2 u) W2 H. a0 `; u
- let frc = Resources.getFontRenderContext();
U/ |5 E7 A) ?. T- z, H - bounds = font.getStringBounds(str, frc); o' m, G$ s- ?8 q( g5 {$ F. D, \
- return Math.ceil(bounds.getWidth());
' y* M- x \4 z; `# ~- z; ` - }; f$ {3 [( H. O+ w8 }8 \: O* c
+ F, W2 L2 R% q/ B7 x- da = (g) => {//底图绘制0 e* f: t1 D$ _
- g.setColor(Color.BLACK);( w% ?' ?' k" m, U% j
- g.fillRect(0, 0, 400, 400);3 ~& g) G' _' J) C
- }# W+ q/ r6 r1 _
- ) z) E# x9 h: u& m, e
- db = (g) => {//上层绘制
: N. J. J! r. H& B - g.setColor(Color.WHITE);% O: {; n, t( S9 `: M9 f; k
- g.fillRect(0, 0, 400, 400);; T: r# ?- M( `, V, K0 {& Y7 k
- g.setColor(Color.RED);$ G% G( M! p% k8 Q
- g.setFont(font0);
* n7 F1 W! D- N: h% I" [: H `+ | - let str = "晴纱是男娘";9 X# u; f3 b1 g( f8 U/ a7 n
- let ww = 400;, D$ g4 w" z, p" j% q# ~
- let w = getW(str, font0);2 I% E z: B+ D1 a$ T9 k
- g.drawString(str, ww / 2 - w / 2, 200);2 w+ H$ R! \; |% u, y- A P# l" x
- }
, q" ]6 s8 ^+ @& f; H; n* w
7 j# A, j& e3 t- const mat = new Matrices();
. T1 W. m+ T2 J6 q, L, w; | - mat.translate(0, 0.5, 0);0 n2 U. c/ S+ J* c7 w; E
! |/ a, ^7 u4 W! p) }- function create(ctx, state, entity) {8 P$ c Q4 L2 s* l7 M9 p& d
- let info = {7 x5 Q+ W$ R K3 h
- ctx: ctx,
5 a0 e2 c; G( y; `4 ^3 g - isTrain: false,
6 F2 E C# a X0 a+ u) ~ - matrices: [mat],
$ F" c2 _' f6 y - texture: [400, 400],* n. x7 i# n* k( D& n3 F! W
- model: {
: N3 |; C8 q6 _ c, \ - renderType: "light",
$ v+ V- k+ W: t - size: [1, 1],
5 H4 b, _7 J/ {7 V) S, N - uvSize: [1, 1]0 w2 L0 o, U( x; m! x6 y" i4 `
- }
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- let f = new Face(info);
+ C1 s6 p) ?% a- z+ M - state.f = f;7 p. s+ A3 O( {9 l) e+ O( D
- 6 |; U- b5 W/ u+ y8 \; ]3 _% H
- let t = f.texture;6 T# ^: v5 f5 j! M8 I. E$ }
- let g = t.graphics;1 p* m6 g# @1 ~$ D: }+ g" @
- state.running = true;4 a8 z( ]) ^* L% `& a1 V& P" \) F ^9 v
- let fps = 24;
% B9 D4 g5 v6 Q; C+ | o! n: Z - da(g);//绘制底图9 |( S3 v7 e2 j9 i5 g
- t.upload();
; D- R5 D5 n8 d! p - let k = 0;
3 H% Q8 a2 S9 J) P) M5 H - let ti = Date.now();* {6 o# M9 O% A3 D
- let rt = 0;
1 A9 H' @- B9 t& j' c9 Y. h - smooth = (k, v) => {// 平滑变化
" C" T: S9 e. { - if (v > k) return k;: b. f' f# D' Z: w! v! M5 v4 x
- if (k < 0) return 0;
: G" ~3 v+ n2 k* V9 i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 e. m, C' E3 B' t" d - }
+ P4 k: \ s8 ^+ n! ^( q - run = () => {// 新线程
; s% a6 y/ {) N# S& X - let id = Thread.currentThread().getId();' v; T4 Y! ^, L$ \& i( ?
- print("Thread start:" + id);
! [! o& f) ]( d9 \1 o: B% ~/ {" V - while (state.running) {
% W) k9 w* M1 `9 t- | - try {7 @- m+ i* ?/ }( N. r) h
- k += (Date.now() - ti) / 1000 * 0.2;
$ O# s8 Y7 ~% K% Y# z* `+ R - ti = Date.now();
3 n4 g& n2 A o( Y% v4 q - if (k > 1.5) {& u+ \9 v7 Z* a3 \* E7 c
- k = 0;
- U8 ~" H% T, l5 X! a - }2 l6 D/ ?3 Y+ ^- O2 f
- setComp(g, 1);
5 k; p( C8 l5 ~- @! B& o4 h - da(g);
2 N7 U x! d0 Q3 _# n - let kk = smooth(1, k);//平滑切换透明度
" V2 \; `8 S. p- ?; W @$ @ - setComp(g, kk);
) l8 n0 x9 H& }% D - db(g);
/ g1 W" Y9 F) U# C( F - t.upload();
; J. @6 z0 U3 X: P - ctx.setDebugInfo("rt" ,Date.now() - ti);7 O# A) X5 A7 I0 z% Q
- ctx.setDebugInfo("k", k);
, u6 f( ?( v0 Q - ctx.setDebugInfo("sm", kk);
3 R9 s+ {# ^5 s% K$ Z- _ - rt = Date.now() - ti;- R- o" g& i/ F) W* }3 v. Z
- Thread.sleep(ck(rt - 1000 / fps));
8 h) f% J8 q, L/ E9 \- Q( V - ctx.setDebugInfo("error", 0)
; u, I: t. P J% B - } catch (e) {- U" W, J3 }: U* w0 t, [7 b1 h
- ctx.setDebugInfo("error", e);7 _4 X q* E+ o/ C7 v N
- }( p( Q; Z- n- \ [$ O
- }3 E/ W9 [) s+ [- _- A& `
- print("Thread end:" + id);
' Q5 i2 D: y% w Z - }
; z" K( Y l. |- } - let th = new Thread(run, "qiehuan");
/ F1 J' k2 c o$ q! X4 w6 l - th.start();+ R. ^. B" @0 v5 d$ f% k% `
- }7 I# C$ r0 M5 z k
- / q& \, d/ c2 s3 N8 {
- function render(ctx, state, entity) {: ]7 q' ]% i0 @& Y7 H
- state.f.tick();6 V' T6 J5 _7 g0 R7 C
- }
4 d+ d% S% i, p/ W9 E2 X
# Z6 }9 B. o4 I {* ^, r- function dispose(ctx, state, entity) {
4 F. ]' E0 q7 h' V - print("Dispose");, n) z" Q/ H) a
- state.running = false;
1 r0 |! j- [- v - state.f.close();( ^' o( Q" O1 n
- }
d j! ~3 T, s! C; i - / p; t! Z: V- i" A( P
- function setComp(g, value) {
, c% J$ y: _! Y2 `# N+ r4 w; x k - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 |& _% b1 w: }8 n$ `7 E) V4 b2 z - }
复制代码
$ G/ y. _+ Z* y+ X: i7 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。
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! D6 }& N: ?& W. U7 l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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