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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。6 V# i" C( B- _
- importPackage (java.lang);
8 R* ]" Z. A$ a+ _ - importPackage (java.awt);6 n; W8 O: d0 U: d: r1 u, X; y+ X+ w
- 5 u8 `# B3 T2 b
- include(Resources.id("mtrsteamloco:library/code/face.js"));9 X2 I! T9 @( A7 K
, _7 U: m& m9 J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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3 D3 f) p, |# ^# F& z, X- function getW(str, font) {& s# `+ x9 R* n6 w. o
- let frc = Resources.getFontRenderContext();; N, }* Y1 P- }* N; H1 {& _
- bounds = font.getStringBounds(str, frc);3 t8 `% W2 k& L; A8 Z
- return Math.ceil(bounds.getWidth());
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$ y u; [( [6 a' `" { y2 Q# R' R- da = (g) => {//底图绘制9 j% g. g( l" m7 S; w, t$ G8 Y7 D2 ^
- g.setColor(Color.BLACK);2 N( y! X" _& e0 T7 J! h9 z
- g.fillRect(0, 0, 400, 400); e8 D9 |* L0 a+ I0 q2 ^
- }
& x* r1 R5 I6 v" C0 }$ H1 B6 c( ^: S
: _8 _* j+ z! ~2 E- db = (g) => {//上层绘制5 a& U- D# i) r: _/ C
- g.setColor(Color.WHITE);* J; Z- u7 P6 w k# {
- g.fillRect(0, 0, 400, 400);# S0 V, q. ^& _
- g.setColor(Color.RED);) B9 F8 V, D4 ]- f
- g.setFont(font0);
0 [% n* D; z6 N. J) r/ j - let str = "晴纱是男娘";4 j8 A1 X- D: D, m9 f
- let ww = 400;. K+ ?6 A" g6 n4 r* `
- let w = getW(str, font0);
. g- K; h2 _& ?! i4 o% A - g.drawString(str, ww / 2 - w / 2, 200);! b4 b, _" I) ~
- }
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( L+ j* v; e. Y3 w/ G3 o5 [, n5 x- const mat = new Matrices();3 ], w8 y! Z; ]6 b! _
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {% k, x0 ]! k, E5 L
- let info = {
0 X) P8 e! }1 X/ P( m& L& Q8 @( C - ctx: ctx,) g0 Q: T( [7 D3 F" f) h) ?7 u
- isTrain: false,- k7 |# T8 L3 u2 M& J, k4 m/ ]
- matrices: [mat], U9 x# y& P$ ?+ j I
- texture: [400, 400],
5 U4 {4 n2 w# }0 y# Q - model: {2 o: a! }8 N6 n- h9 b
- renderType: "light",
0 _4 g6 r; q; }; g) K5 J - size: [1, 1],
/ i4 A* Y* S2 @/ ~5 l; [$ ~ - uvSize: [1, 1]
+ x; H; G' F, g - }- S3 y& T* z/ d9 ~4 B0 a
- }
4 U; l6 `4 r1 }( b - let f = new Face(info);: f% N7 V2 |& Z& B5 x. O; [& ]0 n) n; l4 ^
- state.f = f;# L5 l6 \ A) I# h0 x
- : F) ?4 o% G2 |9 G$ G7 M
- let t = f.texture;
- u# Q" Z$ j1 y3 q+ q$ _! V - let g = t.graphics;) y2 x) G+ T: e* R2 ]! c
- state.running = true;
0 |! h* q0 G& E - let fps = 24;, i# m* n+ d1 k _+ J: \# s, _
- da(g);//绘制底图
& Q4 `4 Z2 l2 } - t.upload();3 K0 U. L. U+ R: |2 Q
- let k = 0;
3 u4 D2 O$ O8 N) Y; { - let ti = Date.now();
$ k* w! g- G9 M( k. |) O - let rt = 0;' R0 u0 d6 N* V0 n7 B5 m3 E. q
- smooth = (k, v) => {// 平滑变化
4 I2 I$ N o- H. v5 W - if (v > k) return k;% z" d1 {' ?) s& F3 \
- if (k < 0) return 0;& o' @+ B7 U, ]* H' ^+ d* M
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 |, h& i, W* T; y, G1 t8 j
- }
9 [) h2 C) y: r, p1 M+ }* y - run = () => {// 新线程
/ Y @6 Q- D/ K5 c, m5 {2 \" v- w - let id = Thread.currentThread().getId();( l# t6 P& L" Y/ I
- print("Thread start:" + id);% F2 I6 f; |* C" r# s$ a3 [
- while (state.running) {
6 n6 L( h9 |- @6 J+ m7 b - try {
/ c+ C: S6 J. ^8 {% e - k += (Date.now() - ti) / 1000 * 0.2;4 A+ m: H) t- E* i# W6 t' N
- ti = Date.now();+ F# c( S) P/ I' B- W
- if (k > 1.5) {
4 ^8 F1 K! p1 v& c; @7 y - k = 0;
1 f: B4 U8 d& `3 K; h - }
$ a% C/ K0 N+ V/ `! W* `0 g; ~ - setComp(g, 1);
! @: d2 r; }3 Y7 w4 W/ C - da(g);8 Y% o0 H7 ~: P2 m# h0 Z
- let kk = smooth(1, k);//平滑切换透明度
! j& Q8 j5 j, c% { - setComp(g, kk);* ~0 q) e1 ?3 ~3 s, o" z6 V
- db(g);6 F6 q3 D" p0 R" V% H5 ]8 O7 `
- t.upload();7 q% l& F) W/ Q6 M* X4 i
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 y# z1 I# A1 ^6 y9 P
- ctx.setDebugInfo("k", k);# A" i; D. |5 q
- ctx.setDebugInfo("sm", kk);
: P- |1 c, \. V$ D% X* J - rt = Date.now() - ti;6 M9 g% Y# b* e8 W
- Thread.sleep(ck(rt - 1000 / fps));
" B+ u* J1 K. M' `/ ] - ctx.setDebugInfo("error", 0)
* S1 u" [; ^/ k1 F2 J% a( H8 y u, ` - } catch (e) {2 r; B8 D9 t' j6 Q
- ctx.setDebugInfo("error", e);$ I- x' p7 k6 m
- }
3 y+ v/ H' M& d( i% e4 Q1 j& {* {! b - }6 H6 g0 H( l9 X5 Z+ l! \, W
- print("Thread end:" + id);
- w) ]9 w% Z" @1 r - }
7 g2 g1 f0 @% o5 z - let th = new Thread(run, "qiehuan");
4 T/ w: y& P! t" ~3 W - th.start();. B8 N. c9 \$ b, A
- }6 {5 j D. _. u/ R( B" n
- + @( W2 W9 C, F
- function render(ctx, state, entity) {5 A' u6 N, S8 {7 y, @! u
- state.f.tick();
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1 X" C. [( W C) {* x- function dispose(ctx, state, entity) {. ~- I- C( Q3 N4 h! x
- print("Dispose");
. f5 j5 ^( T$ G" _+ Z8 u - state.running = false;9 |4 z4 {/ @5 v! | S% K
- state.f.close();
! q0 u* w8 @+ n6 O0 w. A. |. B - }
K- F: ^1 {3 I7 _4 v" P* z - # B7 ^9 e4 M: y. k: s, ]
- function setComp(g, value) {7 W6 K+ m/ s* X. u7 p8 Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));& s% P. h1 }0 b. y. x
- }
复制代码 , A) c* c# `/ u# g# b9 F
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)9 d3 ?: x4 f- J2 [
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