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- V9 Z7 x- [( H8 p/ ]$ N, J8 z1 N' E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。+ G/ x0 H3 q% G, J/ D/ {
- importPackage (java.lang);' h j0 k( d& B: a5 x4 ?5 ?
- importPackage (java.awt);- c0 V7 N4 J8 V1 t$ {
- , X1 O' B& h% D3 d+ H7 T% r
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 d5 s) M/ ^" y1 T D9 u
- # m8 D7 C% a8 U& ^, T# }. }
- function getW(str, font) {8 ]* w0 X1 z- `$ G4 r
- let frc = Resources.getFontRenderContext();# L$ D* f! A+ h, k
- bounds = font.getStringBounds(str, frc);
' D" X( h) }: V# p: S - return Math.ceil(bounds.getWidth());" b7 B% t% i$ a7 d5 l3 u
- }* c4 y2 R3 x7 @& r
/ j: f1 |# O9 n N- da = (g) => {//底图绘制0 J) z& d+ g+ X% `7 z$ o
- g.setColor(Color.BLACK);
3 m, j0 L% @6 s k - g.fillRect(0, 0, 400, 400);
# P; B- d9 L6 H6 x" q! Q$ D4 f - }+ z/ }+ V5 R7 J
- z. J3 M+ ~! r: g( \) d
- db = (g) => {//上层绘制9 D* y2 P% T1 y
- g.setColor(Color.WHITE);
; D# C9 c. _* p6 D - g.fillRect(0, 0, 400, 400);3 O3 _+ ?" a+ ]3 z# r* J7 C& p
- g.setColor(Color.RED);6 p1 ~- }$ a& j6 }; {
- g.setFont(font0);
- O9 L( T, i3 O7 q - let str = "晴纱是男娘";$ `2 r0 A) S9 c3 t) m% A
- let ww = 400;2 j: y7 |" i" c8 I0 ~* i
- let w = getW(str, font0);/ X/ j- M2 J) W: ~
- g.drawString(str, ww / 2 - w / 2, 200);8 ?$ A2 Z# I/ n+ i
- }
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7 Z" S) c. U2 e# J: D) f% _- const mat = new Matrices();
, n( ~1 ]: _: o8 r# r - mat.translate(0, 0.5, 0);: r- d6 ~: j; i1 l& c4 U
1 g- P1 _1 k) g4 H3 N6 U8 t- function create(ctx, state, entity) { n, V3 i. b! ]. y1 n
- let info = {$ A6 m# N" a2 K2 U" L" E& t
- ctx: ctx,6 k+ P( m3 ]6 G$ g2 O7 J% v4 b/ }
- isTrain: false,
" g8 N7 j. A/ h4 B* ]; [ - matrices: [mat],
" A$ ^% P& A" p - texture: [400, 400],7 u* R, x, b& D1 R1 I$ Y
- model: {9 G; M8 P& u$ Q: q( H/ P* I4 D
- renderType: "light",3 ?. b; ~; m9 U8 q
- size: [1, 1],/ T) Y2 N8 ?4 A
- uvSize: [1, 1]$ I8 i: s) B$ c* K$ Z' w/ o/ t
- }
9 f/ d- P3 s& x7 h - }
- w7 e& p. P- Y' g e! ~( ] - let f = new Face(info);
9 T; f( R: q1 {: z$ G/ @ - state.f = f;- e# ^* | I: C1 T" a L
- $ g- S8 N* P/ E" L0 ~2 T( t& t
- let t = f.texture;) u8 Q' G" Q+ V0 w4 q4 A
- let g = t.graphics;, D) V0 S: u6 l1 [. ^7 p* M
- state.running = true;0 O! W1 ?& ?5 G! K. B" X
- let fps = 24;
' u) @- ]+ r+ r; @ - da(g);//绘制底图
( w6 E, y7 M# S' l - t.upload();
' E2 A7 `7 K u, y - let k = 0;+ G) l& j( m# q, G. ^
- let ti = Date.now();
7 L2 N* N7 i* k+ ^; O - let rt = 0;
0 T. v. ?+ _1 Z6 ~) k - smooth = (k, v) => {// 平滑变化# Q, e: {; W s& n0 I5 X3 E
- if (v > k) return k;
. \0 @: J- k1 R: N, i6 B1 m( U - if (k < 0) return 0;
8 q6 D" e2 L: i; g4 b5 _ l& \ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程, \* U6 h- J, U# H6 D0 j
- let id = Thread.currentThread().getId();
& U, j I6 U" E' R. D q3 c8 L4 d! p - print("Thread start:" + id);" h+ P& {" i z3 a) o6 U( z
- while (state.running) {2 ~+ s7 s R) c; s
- try {1 n3 F* F) \ ], F2 U
- k += (Date.now() - ti) / 1000 * 0.2;6 c& G$ y3 K/ I$ Y5 b
- ti = Date.now();
6 |9 G( O8 y% m - if (k > 1.5) {
A. a+ O t W7 X - k = 0; h+ A- h4 t/ [3 W+ Z* o
- }
) s( }) V% _" k' A D; b4 e - setComp(g, 1);) F- A( b+ f) C" b R
- da(g);
6 r/ t! {7 Q( [2 \" ?& w, T8 q. W2 ] - let kk = smooth(1, k);//平滑切换透明度5 P# C& u+ @; _1 X9 x
- setComp(g, kk);
: V. c3 L0 F- ~: ` - db(g);5 x5 J; _+ R! d5 ]) O
- t.upload();' e: O/ H% k2 p$ e4 j( s) z4 U1 d
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 l2 F! p, e$ ~. V& g9 W8 Q - ctx.setDebugInfo("k", k);
) c: ?/ T2 {5 G6 t! a - ctx.setDebugInfo("sm", kk); }0 o, q1 I( t) U
- rt = Date.now() - ti;$ R7 z8 t% o; ?& j7 ?6 R) S# V
- Thread.sleep(ck(rt - 1000 / fps));* r' \* ~: O) k$ H8 f" v5 |
- ctx.setDebugInfo("error", 0)
/ V v2 U2 h* p: s - } catch (e) {
+ F, V3 |* G4 H) Y) f - ctx.setDebugInfo("error", e);9 i! M2 |% g6 h% g- e
- }
) g0 m1 |- d$ r& W1 h0 a - }9 O5 h }1 z5 v |& z2 q" E# }
- print("Thread end:" + id);
# ~) k9 v- Q6 T1 y' T$ E - }
$ o0 o8 \1 U' k8 u+ Y- g# k- _1 _ - let th = new Thread(run, "qiehuan");
# O$ U2 ?! n% R* D% e2 R - th.start();$ `4 ?4 J d v
- }9 c9 o% ]3 o7 v5 o" e) g# V
5 S9 T/ U- c) R* G& O8 ^- function render(ctx, state, entity) {9 y$ v4 u# b) v! Z5 W. B
- state.f.tick();
. ?. l7 l0 i3 I5 S5 w - }
' ^9 W& ^; X) k' ~
/ g5 W" ]; x" T7 a- function dispose(ctx, state, entity) {# @ w$ D- x* I: d
- print("Dispose");6 g3 u& w2 ~1 E+ f! Z
- state.running = false;
7 w$ R2 O9 E% M; g$ r2 T* j" } - state.f.close(); l! D" y" s% l) o6 w$ D" t h
- }7 u2 ? ?- M* `' @
6 Z/ }0 l1 N; u1 r* C) E5 w, D- function setComp(g, value) {8 o5 l( |' p1 X7 b* U% q1 ~3 S
- g.setComposite(AlphaComposite.SrcOver.derive(value));
O4 P5 j- r S$ j" e# O - }
复制代码 / b4 g7 U' h5 C5 L( B& Y
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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( D. b2 T4 M+ T2 D1 |8 s% I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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