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# ~7 d. r+ Y1 |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。, `4 |4 v: {7 s2 U
- importPackage (java.lang);
: e1 Q" C8 z; a; {" y5 W6 C - importPackage (java.awt);
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. e7 a3 G0 K' N+ p( m- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 E- ?+ [2 a7 b# j
- * Y- m: A$ l1 d' K1 X
- function getW(str, font) {6 O* J+ T, y; ~
- let frc = Resources.getFontRenderContext();) B( ^/ e+ E2 g" w0 I# z
- bounds = font.getStringBounds(str, frc);, P4 n+ l" {7 T: L
- return Math.ceil(bounds.getWidth());
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; u- i" n0 j* a- da = (g) => {//底图绘制
& x5 @* i/ G% q% p/ J7 A3 | - g.setColor(Color.BLACK);
; G, W# P& b, M. J' _ - g.fillRect(0, 0, 400, 400);" s6 B3 `: [4 }, {$ ?
- }
) A6 y) D5 F" u: x
6 X1 J1 H( y$ g" G- db = (g) => {//上层绘制
" P! n# o/ E5 o9 o+ Y1 O0 Y: G/ D; W - g.setColor(Color.WHITE);
+ ~ S* u) ?& x2 |$ ]6 U q - g.fillRect(0, 0, 400, 400);
g# D: o# P5 n1 e - g.setColor(Color.RED);
+ d1 M2 ]1 R+ I$ q3 Y% L - g.setFont(font0);
3 o3 [! ]( G3 n4 R$ S - let str = "晴纱是男娘";* C5 m, m* k, ^4 Z" Z. Z- x
- let ww = 400;
3 Z \( c; T* i* ~6 p: ]& d - let w = getW(str, font0);5 _4 e/ z4 |0 a1 o% p- [
- g.drawString(str, ww / 2 - w / 2, 200);) G; j* s: Z- w: a! q& l
- }
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7 D& A0 H- o: Z. H1 j- const mat = new Matrices();
0 j8 {& A( s" N7 c+ U, ] - mat.translate(0, 0.5, 0);
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% E* ?' O+ N$ G* T: L1 a; E7 s0 K- function create(ctx, state, entity) {
7 ?) X3 N. y% M( h& \ - let info = {
4 K3 C/ z8 q% L! _7 m- E, {$ c/ C# C - ctx: ctx,, e+ y& U2 ]6 T# i: m
- isTrain: false," a2 L& q( e: E9 `4 p% U( R+ P4 S
- matrices: [mat],: H$ S; ^1 |# |$ g% W
- texture: [400, 400],
9 F8 s. z7 @" E7 i, E3 Z - model: {+ s) t! Q/ o# z
- renderType: "light",
1 L6 s5 `7 v! m* n& V - size: [1, 1],
( L4 [/ E1 E! \; H+ \7 z - uvSize: [1, 1]6 S; C$ T' H' _/ k6 q+ T
- }
" C9 @$ O+ X# q9 o* ^) }7 E9 n - }* J1 m! G+ i0 W9 X# @+ s
- let f = new Face(info);
% v6 m0 y( n( r3 c l2 G2 Y; P" U0 w - state.f = f;
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9 Y2 H8 `8 w9 J- let t = f.texture;
8 M) X/ z. S8 |5 _1 `, [ - let g = t.graphics;
9 N8 ?( P- T( T$ k - state.running = true;
) ]2 S5 [7 K% H T. [ - let fps = 24;2 G/ f* L' o/ I5 k* H4 q) `
- da(g);//绘制底图
% Z/ ~- X% A( A0 y% i. s7 T3 D - t.upload();& T. c% `5 z7 w% W1 {' k
- let k = 0;* b0 b! `4 F8 D) S& Q! f0 j
- let ti = Date.now();
: `" Z; O. n% d$ C! I$ b - let rt = 0;
, @: R6 o# m1 g4 T - smooth = (k, v) => {// 平滑变化
8 y' n( e2 |3 ` - if (v > k) return k;0 `1 k' U, Q1 Z" @ O2 Q/ G0 s7 F) j
- if (k < 0) return 0;
# @( Q: V+ d* ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 Q; N( e9 F" z( q6 O7 @ e8 L- n( s/ ]
- }
2 I! f: P e3 i, }$ H5 v, R; k1 o - run = () => {// 新线程; \3 P& Q( b3 ^4 p+ P
- let id = Thread.currentThread().getId();4 N' a2 e2 x4 z6 @+ o7 [
- print("Thread start:" + id);% F5 f1 p% l# p3 {
- while (state.running) {
& w8 Z2 g% e2 L$ S - try {
! f6 _& ~3 k( y* L f8 o - k += (Date.now() - ti) / 1000 * 0.2;
$ h) k7 f: S1 g! V. J - ti = Date.now();
" g$ D) y2 l9 u7 J5 K0 ~ - if (k > 1.5) {
4 [( a) d0 j# b$ m5 j' @4 p! L - k = 0;& J. w) P: i, n/ x) Y
- }
2 j* H7 X! [ C- T3 @ - setComp(g, 1);
& z! D* T% s" Y$ v% i/ r0 d - da(g);
- ?6 a, T; m, [9 h1 x- }) r - let kk = smooth(1, k);//平滑切换透明度
0 o2 E* @9 b" R% t1 u - setComp(g, kk);
" p" U- p3 w& K: l$ R& p5 k/ m - db(g);
) I' m, w T; \; t - t.upload();6 b0 C, t' S$ J. F1 @
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ z) L, Y# f6 [6 A8 @% q
- ctx.setDebugInfo("k", k);+ c/ g6 Y7 O% }7 ~2 P3 N$ V
- ctx.setDebugInfo("sm", kk);
# x$ Z) j2 y+ T9 H - rt = Date.now() - ti;8 [- } s8 U/ j* e
- Thread.sleep(ck(rt - 1000 / fps));$ O$ i( s' h; X" |% c" u4 s0 p
- ctx.setDebugInfo("error", 0)% w% o3 L% y I _
- } catch (e) {$ N/ Z$ E& n! D e" Q& H: b+ {
- ctx.setDebugInfo("error", e);
5 }3 y2 o9 z: Y7 M. r/ g. W& ^# |2 [ - } n3 [/ m; H* R4 v+ \7 P7 w
- }
8 s% A' t0 J( Q2 a8 X/ l3 O! J - print("Thread end:" + id);
5 l/ F) P$ ^6 E0 {& F: D) I - }
! i2 m+ B; [3 Z/ \. h. m - let th = new Thread(run, "qiehuan");3 H D+ s. D2 u7 F
- th.start();% n/ i- {: z! h9 G
- }
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- function render(ctx, state, entity) {$ y8 p! u0 p" ]. D2 B
- state.f.tick();
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- " i5 N3 v; ~0 ?+ H8 i' k8 f
- function dispose(ctx, state, entity) {
& C( Z. w# b) q' | - print("Dispose");
1 A. r" b) K0 y - state.running = false;
- f4 d/ M% b3 F/ b% k& B0 X1 u9 R8 ^ - state.f.close();: F3 ?0 [/ E5 p) h+ f! S
- }+ N* O' G: C' c$ C0 w
- : j) c( ]7 _$ c. x5 y- }$ p$ k
- function setComp(g, value) {/ k9 |/ }( {0 a" m+ D' {
- g.setComposite(AlphaComposite.SrcOver.derive(value));
- p* @% D) H3 S/ Z7 u& Z - }
复制代码 3 ?0 T) \8 _# I2 Q: Z: e: R1 a
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。# I) I% n6 i9 R0 ^0 G3 C! h3 K1 @3 ]
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: O: a0 X6 x$ Z8 {$ y顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下) V5 V7 q$ B" ~% c i# ~, N
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