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+ A3 U' z8 n% I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 }9 ^) T$ g1 l/ E5 X) {& s8 X- importPackage (java.lang);7 K+ F% f7 p& K$ G& D' R
- importPackage (java.awt);
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1 M l8 t" `) b4 G- include(Resources.id("mtrsteamloco:library/code/face.js"));$ c, Y; [# k( A4 O3 U2 R3 |& Y
- 1 s% m* g% {5 z- d6 t! d. W( r
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
& g) j$ O9 t }2 u1 S W- [+ E5 U" k7 \ - let frc = Resources.getFontRenderContext();
" o/ l1 k9 E9 G; w - bounds = font.getStringBounds(str, frc);; a5 O2 O. N8 M
- return Math.ceil(bounds.getWidth());
4 L8 ~/ O7 f0 y! c$ ~: P - }
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- da = (g) => {//底图绘制; P) k$ B8 }4 ]; x9 z) g
- g.setColor(Color.BLACK);
$ f% m3 I9 @- g5 ]8 p; C9 O, l - g.fillRect(0, 0, 400, 400);
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- . z* o _- \' O- D1 e3 X& @
- db = (g) => {//上层绘制
& x" i7 G: D. l, t0 T - g.setColor(Color.WHITE);- o, g& L1 E& G* s4 m
- g.fillRect(0, 0, 400, 400);' {& K% j4 x. c) n8 F
- g.setColor(Color.RED);4 a$ a) T; {2 P! m; \4 [! ^
- g.setFont(font0);/ V ~3 [6 H) n! G- U
- let str = "晴纱是男娘";
( W0 \# [6 i$ f5 r( E; [. J3 r - let ww = 400;
7 K0 I% Q) v5 w! L5 ~. t - let w = getW(str, font0);
& E( _7 S" O5 Q# g - g.drawString(str, ww / 2 - w / 2, 200);
, }; H5 F/ Q( W9 {: w l- @+ F - }
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' V0 K/ E& p7 _( q- const mat = new Matrices();
+ S9 Q9 a" H# U* n! K - mat.translate(0, 0.5, 0);7 j, e: ?1 n1 f8 T
- G' Q7 s1 B3 d' n* o( z* K
- function create(ctx, state, entity) {' c9 J, w' ^. ^9 a: O+ P
- let info = {4 w1 z: a% F O/ w0 ]
- ctx: ctx,
; Q, b/ f1 \+ f8 M3 A# ~ - isTrain: false,4 A. t0 J- k5 T# |# ~; D% @
- matrices: [mat],
( e& T# ]* |0 |0 l - texture: [400, 400],
. p5 w+ k9 V$ D+ r" @ - model: {: Y- O4 | J, D$ Q1 s! F
- renderType: "light",
1 ?' c6 X2 g: |$ X9 d - size: [1, 1],
6 }2 s0 t; y+ j( @# R2 Q - uvSize: [1, 1]' {4 N' j2 E& {. h/ z/ p
- }. T; Y$ f. R' @+ w
- }
: n4 m7 }* e$ h2 Z. k7 N - let f = new Face(info);0 T$ g9 @, Y& s8 N$ n1 f
- state.f = f;8 z) m! {+ h% U4 Z6 M
$ X. |9 o5 K( w9 p, V% f: t- let t = f.texture;9 o2 L1 b0 z% \# |% M U
- let g = t.graphics;
! U' {+ L! A! J - state.running = true;* b( `# X5 _- m& m% }
- let fps = 24;/ f! c: S4 p. g2 I
- da(g);//绘制底图
1 o$ c- U0 C" A - t.upload();
$ `+ v: |0 t! C l6 n& I - let k = 0;
' s& n6 o U1 F! I7 [/ L) R8 i* v - let ti = Date.now();' G8 C1 t2 @4 w7 b1 P, O a. ]
- let rt = 0;9 F, @( V* N2 S0 t* s _
- smooth = (k, v) => {// 平滑变化; z. I. I, T# K! p
- if (v > k) return k;
* x) B; V% A0 z- `% i$ t6 | - if (k < 0) return 0;
& c6 w0 E- c0 Z& a4 W/ S, T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* ~4 M+ Z* I) ]3 k/ {( i - }& {' Q \( o$ r* D
- run = () => {// 新线程
, i: W9 ^- r7 u4 x" j - let id = Thread.currentThread().getId();
+ M* q% K1 f/ s) X$ J - print("Thread start:" + id);
1 H1 _' Z9 r/ r9 q" o% A - while (state.running) {: G8 J+ [6 B/ h/ e( C
- try {4 c8 z) V' ^! ~& v5 C x) [3 B# j
- k += (Date.now() - ti) / 1000 * 0.2;
" u: I4 }$ B" \4 u2 t U - ti = Date.now();! \, v; y0 ]" D5 C$ s" u) c2 N% |
- if (k > 1.5) {3 Z9 v9 U1 G7 q- q! U
- k = 0;, a- E, Y# l- n1 m6 U0 A
- }6 @# M1 ~ ? y4 I& I1 W! o: Q
- setComp(g, 1);
5 J3 l$ z* j8 J! y% o9 U - da(g);/ v( A1 ~9 Q; e+ O6 y7 Z1 o
- let kk = smooth(1, k);//平滑切换透明度9 k# J, p) \) G. B; ]( J" s9 f
- setComp(g, kk);
3 e" [* k. L- A2 \4 E - db(g);( c! M/ U; y- w& Y4 ~( b% n$ N
- t.upload();
/ I& b; r W. W! o - ctx.setDebugInfo("rt" ,Date.now() - ti);/ A& _! A9 y; k& z
- ctx.setDebugInfo("k", k);
# z1 x- R' c Z* [% m - ctx.setDebugInfo("sm", kk);+ f! v2 V3 G; |
- rt = Date.now() - ti;$ p8 m2 D! [* [6 o; p' `8 L
- Thread.sleep(ck(rt - 1000 / fps));/ l+ |: T1 U y
- ctx.setDebugInfo("error", 0)8 E4 h: N& [3 P- l' o( S
- } catch (e) {
4 X; f; Z" b4 r) [9 o; U( V( T - ctx.setDebugInfo("error", e);$ G# J+ A- v3 a
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");' l: ?: e7 s8 h9 U/ b7 [
- th.start();) Y$ ~3 b/ _* _9 U* l
- }
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- function render(ctx, state, entity) {
0 r, p: T# j& B8 a6 x5 ?" Z - state.f.tick();
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- $ _) k; w# {8 R+ M `5 C
- function dispose(ctx, state, entity) {- i) F' }. \: m6 b4 J. v3 s0 x a
- print("Dispose");' G3 a/ X$ c9 c: D- A$ ?7 W
- state.running = false;
/ n0 L4 W0 K/ r7 o) K - state.f.close();
% `2 y+ ~+ G; `4 @ - }
* w4 |. K6 Y; x* [; l- r
* o$ J# [: E0 H8 D2 j& |8 O' ~- function setComp(g, value) {
# p& f& y1 e) ~, s! i/ N0 i1 j - g.setComposite(AlphaComposite.SrcOver.derive(value));( u) X5 |* Y, F
- }
复制代码
1 I) D; Y; z/ Q. 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。
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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)2 E! X- q: i( ?3 u7 T; R) d5 s
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