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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。* T3 }4 ~4 j8 I+ q: l
- importPackage (java.lang);
, N0 ?" x3 l; t - importPackage (java.awt);
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( L. |2 l9 X; e }- include(Resources.id("mtrsteamloco:library/code/face.js"));
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2 ~$ I' C. Y4 g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
4 G' \6 h: l& x" O - let frc = Resources.getFontRenderContext();
k% l2 O0 _/ y/ B( o/ M - bounds = font.getStringBounds(str, frc);
+ j3 e4 g: J6 f* E# S - return Math.ceil(bounds.getWidth());
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: V, w) ^2 m! |: u8 @- da = (g) => {//底图绘制, m6 \3 t- p0 R+ N. P9 {2 d
- g.setColor(Color.BLACK);
$ E6 }% y" O; ~7 S - g.fillRect(0, 0, 400, 400);
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- db = (g) => {//上层绘制; K+ C9 c% h/ E1 ]" u+ x. l
- g.setColor(Color.WHITE);
# a8 V! r1 i; ^- {& ^, N - g.fillRect(0, 0, 400, 400);
) Z5 P8 H. B8 G" }' R$ ]- P - g.setColor(Color.RED);: ~, t# h5 t8 y
- g.setFont(font0);
; Y5 k, j: v. U8 P! | - let str = "晴纱是男娘";
/ C p, L8 o$ U - let ww = 400;, X6 K" P+ X3 s- F" p4 b5 E. P
- let w = getW(str, font0);: w/ B8 B1 V/ J
- g.drawString(str, ww / 2 - w / 2, 200);3 z+ B. T" \* z
- }
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- const mat = new Matrices();
6 T1 s$ e/ ^" a - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {4 I5 X! L4 z- l$ `2 f2 r) l+ V
- let info = {
1 J# ?+ O. u% X& |0 b5 z1 b9 Q1 h) }- w - ctx: ctx,
% j; [; J+ {5 K; z - isTrain: false,1 ]* y! V* E& W' N# q
- matrices: [mat],
" x1 W4 S$ k7 e! i# L - texture: [400, 400],
H# u7 E; d1 m2 K) i - model: {
4 k/ p3 U, X( ]" ]5 u+ S" G; B9 } - renderType: "light",; [; d- I q( @9 c e/ X
- size: [1, 1],
7 h% U( \6 s8 p4 J" ] - uvSize: [1, 1]
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- let f = new Face(info);0 \% p$ F* c& C3 D) q. [. I
- state.f = f;
' y$ k1 Q5 V7 N# J) I" z
" ^% Y, U" i/ G' x- let t = f.texture;
) D$ g0 i/ M9 O# W2 `, ~ - let g = t.graphics;6 O- c9 m2 U: L6 c) V% t
- state.running = true;, {, E: }2 _& P2 h" D
- let fps = 24;- N# I& o2 W2 P3 E: e. q
- da(g);//绘制底图
; [; H. f% W+ ]8 r g - t.upload();# F* Z, q+ v; x% H2 F) V
- let k = 0;
, A$ Y& M6 o7 D6 a - let ti = Date.now();
T. X! M( Q$ F% {* o* @2 |$ K - let rt = 0;8 E$ [2 F$ C2 n* B2 S
- smooth = (k, v) => {// 平滑变化
& j. g9 Y3 i& M5 Z, f# i+ p - if (v > k) return k;: O$ f. r7 x- h4 }" R0 C
- if (k < 0) return 0;
' A+ s8 b9 t( t, p1 m9 D+ r% w - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) D% U! _3 F2 L ?$ s! T* C
- }' G8 |) I' {; B) l) h: S0 m; c
- run = () => {// 新线程1 l9 I5 i5 i) N& b8 x2 s4 r4 j
- let id = Thread.currentThread().getId();! ]0 R% J( [' D3 ?
- print("Thread start:" + id);
; K! H- K4 O5 R; N: R5 \1 V - while (state.running) {
2 [8 U8 C3 c, \: [/ A0 W- c/ N - try {) z+ z. Z* Z( x7 G
- k += (Date.now() - ti) / 1000 * 0.2;2 }( H% \1 e3 Z4 @7 H: `3 p( F
- ti = Date.now();4 ^8 c% L7 o! m9 Y
- if (k > 1.5) {
2 U5 @ k6 n0 p) [/ L/ z - k = 0;
; E/ G8 n% r1 {& c - }
0 m# \( m& V, B, R5 Y1 i2 d7 W8 p/ \+ Y - setComp(g, 1);' O, z# u, `0 @) ^" f/ P8 O2 O: h
- da(g); L, m* }1 V* X9 k
- let kk = smooth(1, k);//平滑切换透明度
, e0 u# {+ C6 j9 Y/ t7 `6 k - setComp(g, kk);! C% Y- D9 F( ^' J" N
- db(g);
* t: D0 A e" B2 Y* ` - t.upload();
/ Z* l8 w7 R$ L# [ - ctx.setDebugInfo("rt" ,Date.now() - ti);+ K; c6 t* b" \# R$ [1 t
- ctx.setDebugInfo("k", k);* [% ]5 Q' }& M( x# `
- ctx.setDebugInfo("sm", kk);' w' ]( _; r6 E' L* g& x
- rt = Date.now() - ti;
0 W" R; n7 y. x5 \ - Thread.sleep(ck(rt - 1000 / fps));
0 y9 U2 P. G5 J% @6 s - ctx.setDebugInfo("error", 0)& h4 i7 o' x* Y) r% L5 |
- } catch (e) {
6 U6 H3 A/ ]/ n7 f. w5 ~* J - ctx.setDebugInfo("error", e);
- }: V2 m; I: J; n; X, F - }* E; A3 X- m. @. w+ J( w# C' o, X
- }
/ r, j. Q2 A- m; [7 e - print("Thread end:" + id);
8 B* |4 a5 d$ n' M - }
4 E) Q9 N+ e3 G+ s: D6 q9 _+ ~) r - let th = new Thread(run, "qiehuan");
1 y2 J$ T6 G, A; O8 B - th.start();, ^' r5 P3 F3 ^# \
- }* I3 d' u- L2 i* {5 S! a8 c$ ]
k' }+ U0 f# e- function render(ctx, state, entity) {
/ I- \' r% ?0 F: }/ T; |1 m# a - state.f.tick();
2 z! C G0 I: n+ G$ K1 z2 v) h - }
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- function dispose(ctx, state, entity) {
$ s$ v! Y6 @1 v j& l" q4 e/ w - print("Dispose");+ _7 A+ p- R5 k' V
- state.running = false;
, S6 K- _2 B y; e! ^7 W - state.f.close();
" y3 [* ]5 d* h. { - }
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- function setComp(g, value) {
8 L7 S; v+ n( f( I - g.setComposite(AlphaComposite.SrcOver.derive(value));$ ^! K: I1 I2 w: x! A' [
- }
复制代码
: m& @5 H( X2 [3 g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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* G1 H, b8 d! X. a+ D0 o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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