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/ H* T3 c2 e" \8 g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。1 f9 i- C1 `1 F
- importPackage (java.lang);
3 L& ]! i+ E, S8 X* D$ B - importPackage (java.awt);1 R& \1 \! R, G% L1 D( X5 `
+ \- P0 \5 f8 _' M- Z- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- j5 s4 s0 S6 v. S$ F- y; {
* ]# @0 [9 F0 |1 r- function getW(str, font) {3 l& L! q# w) [+ F% @$ b
- let frc = Resources.getFontRenderContext();4 ]! u+ P% O) M! R( F* M( r
- bounds = font.getStringBounds(str, frc);3 T$ ?$ C6 h' l% x. w4 ~- `( {
- return Math.ceil(bounds.getWidth());& n+ q( C. U# T$ T. o: q
- }$ S) a8 d4 B( z3 X! ~! }1 _
- ' @% E# Y9 M4 n/ |9 X; h
- da = (g) => {//底图绘制
$ m$ C* y, \) N - g.setColor(Color.BLACK);
- d0 L9 {' p7 G4 W7 X - g.fillRect(0, 0, 400, 400);
) M8 b" ]% D1 D' c6 _1 h) l - }7 A& K; }: ^1 ?9 ^7 ~
5 Q R& y$ b. Z3 U4 Z% |+ M- db = (g) => {//上层绘制& C; k, _7 x4 L& Q) ^# X
- g.setColor(Color.WHITE);4 R* B- r' x* _, J' U0 l* s/ Z
- g.fillRect(0, 0, 400, 400);
/ @1 c# S6 p9 s5 G6 h& j) y - g.setColor(Color.RED);* q: V% e) I2 O* |5 W
- g.setFont(font0);
9 S6 S# T0 S8 y5 q% A - let str = "晴纱是男娘";
( @5 C" |+ g* H# a$ Y, _ - let ww = 400;4 X/ G4 C2 h, s" {& `0 I' B- ^; _
- let w = getW(str, font0);
9 z! }- T* Y; B! S3 `& H - g.drawString(str, ww / 2 - w / 2, 200);4 t8 W$ E% W2 |$ E, t
- }6 t+ T& F& l! M9 @% a
! i X% k" a+ n2 |3 ]+ o- const mat = new Matrices();) W. ~' g/ T# _2 t+ E$ Z
- mat.translate(0, 0.5, 0);+ t0 K8 ]* r. W R2 v) q4 v: V! o
5 T3 H* d: a- J/ d" }1 B0 l* `5 R( h- function create(ctx, state, entity) {& M9 |: N4 `0 q" Y" T1 |
- let info = {
9 z& V( U- T& l4 Z, L! a - ctx: ctx,% i8 ` W6 L. C' `
- isTrain: false,
$ `$ r# u7 {9 M) T7 P- n$ a - matrices: [mat],% Y5 J6 R' Z+ Y3 t, P
- texture: [400, 400],+ R- m$ B V; Q
- model: {
7 G$ y) n; _" m3 G2 V - renderType: "light",) H7 f8 e% w& @. f, [* c0 W' S
- size: [1, 1],( w, n4 F; q( N" f, p3 b( G
- uvSize: [1, 1]
2 ?2 S. b5 N" k u! d - }2 T4 v7 _ t( f: X$ i, O
- }% c! j- E. \7 f3 t& i1 D4 @
- let f = new Face(info);
, w, K# \. d- @3 A+ a2 p# p. Y# { - state.f = f;
3 w% K' m% [+ x. R. ?4 e
% K! K' y# A% v# @- let t = f.texture;
6 d& a" R$ O% S% p+ T - let g = t.graphics;% R1 f/ L% E6 H& y5 d6 P
- state.running = true;
% k3 o7 R, A! S1 U" c" P8 z6 | - let fps = 24;" W0 B3 h- r" I. n. p
- da(g);//绘制底图7 B9 \$ I4 N4 F
- t.upload();
' Y2 _7 r& Y" q2 S" [9 M - let k = 0;- k; e6 o8 I; |1 Q9 F; _
- let ti = Date.now();
" ~3 u% d6 Q; T9 T; ^- V7 ?) F - let rt = 0;
! O# D0 M& f, Y+ k! O& x - smooth = (k, v) => {// 平滑变化
6 ^ E. _. d. v! s- }3 K3 h( V3 h - if (v > k) return k;+ W+ z* W) C, c, y5 R
- if (k < 0) return 0;
4 V! o5 K c2 W% [) Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 ]' w- L* z C5 f5 I - }
# f/ ~/ h' ?: _0 H* ^ - run = () => {// 新线程% j G& h, A e; u( y* p
- let id = Thread.currentThread().getId();- [ }! U/ a* x" v7 b! ~
- print("Thread start:" + id);
% n# B; T: \' h8 v5 O - while (state.running) {
. `! t2 `+ U* D* k) e5 i - try {
1 d4 Y4 q" j* v ? - k += (Date.now() - ti) / 1000 * 0.2;
% y* {3 p+ V5 r* u' X4 A7 x& P - ti = Date.now();- I5 Z* v6 w4 M, S$ L( @8 a
- if (k > 1.5) {+ {4 N i5 T0 v6 l4 E ^2 V
- k = 0;* @- D2 P# {) m. x H
- }5 k. j2 w( E* r. _, x
- setComp(g, 1);
( B! ?# A8 e% t2 n3 N% G& e - da(g);
$ G! r$ z8 y4 H- Z - let kk = smooth(1, k);//平滑切换透明度
3 q. W" T; {5 y; h } - setComp(g, kk);
6 s. X ]; L5 k L1 `9 O+ Z - db(g);" R1 Y J- u5 _/ b! h x- P. ~
- t.upload();/ a5 a+ c& E( [) k% P4 i! ?$ R4 K% A q# a
- ctx.setDebugInfo("rt" ,Date.now() - ti);/ U: G( X, X8 U8 d/ n
- ctx.setDebugInfo("k", k);
/ p3 r& l/ ^$ ?2 h, ^% M" Y - ctx.setDebugInfo("sm", kk);4 o! `$ u0 ~' P9 r6 c0 r5 S
- rt = Date.now() - ti;
+ i7 i5 ?$ h+ S) B, \ - Thread.sleep(ck(rt - 1000 / fps));- l5 Q; B% M* T0 w& B
- ctx.setDebugInfo("error", 0)
9 Q# \# X+ D0 Y4 H( `6 b8 c4 `: i - } catch (e) {
+ w* L0 h7 U' v$ v# v5 Q! r0 A - ctx.setDebugInfo("error", e);. {. y6 S; ]. J( Y$ G0 I
- }, G3 r" |- A/ n8 D3 u. E
- }
: V' Y; w- s' ? - print("Thread end:" + id);
% H; Z9 {% _& l, ~2 J% \ - }- x' m& K& L) G
- let th = new Thread(run, "qiehuan");
) B+ x' H% ^5 e, V' q. } - th.start();
+ N* a! G5 a: [, ^* S% K8 h - }! r- j2 l/ \/ a3 m, r1 i0 a
- 9 C! m$ {! u: ?
- function render(ctx, state, entity) {
0 l& I; u+ A: ^ - state.f.tick();
b& y8 ^) I7 b% q% u9 x - }7 I# [0 P) P+ } {: ~% A- D4 f+ t
- ( q" `6 Z( ~0 B- y* l9 ^: I
- function dispose(ctx, state, entity) {) e. s, x* I( E) y# ]# S$ |
- print("Dispose");
; q' H* I& ]/ T* _ - state.running = false;# Y# u+ o+ n/ q" l
- state.f.close();
2 h* H; R( @8 T' v - }/ P. Z$ y! a7 ~1 ~; ~$ @
8 o @* {: f* I: F% ]4 l+ V- function setComp(g, value) {9 W2 ~1 u) y+ K2 F" N
- g.setComposite(AlphaComposite.SrcOver.derive(value));* \! k- E. V% l4 u. J7 @; I, c, Z
- }
复制代码 7 Q" l o! Z8 u
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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4 M* v+ c1 H) ?- N5 ~! f) M$ M% h. T- U8 s3 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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