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! x- z' C' j4 ^# H5 j: h& y! x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。0 B% L4 `# g: _9 |! R' `0 P
- importPackage (java.lang);
8 A8 _- D; U3 e% h( l! b* w - importPackage (java.awt);7 _& K0 [- o, {( P- O
1 ^7 h; Q# L2 J- include(Resources.id("mtrsteamloco:library/code/face.js"));; U6 c4 B1 F. |& I0 g
( O2 V! }* W! U" H4 r: ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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2 t5 b5 _ T5 v- function getW(str, font) {) ?0 N+ ^1 i$ I
- let frc = Resources.getFontRenderContext();: }) _' `1 b: K$ x- W4 U5 V* }
- bounds = font.getStringBounds(str, frc);
- j' [+ E: V& }8 Q3 R! b4 W9 l - return Math.ceil(bounds.getWidth());
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- & L+ ~ R. u9 O: Y/ s9 k8 h
- da = (g) => {//底图绘制
# \% ]% V! v' x3 H9 H( i, Z6 L - g.setColor(Color.BLACK);
# `1 {* L+ n2 T3 c8 m5 h4 H - g.fillRect(0, 0, 400, 400);# j5 M" x0 c0 }" [
- }2 T$ D) M9 I7 I6 I' R t8 c t5 t
- 9 t) Y. \: P8 _+ O/ F. @3 e/ c
- db = (g) => {//上层绘制5 D& ~- I) c- A
- g.setColor(Color.WHITE);( i3 ?. d4 @. l9 _$ z
- g.fillRect(0, 0, 400, 400);* f9 r/ C- U) m- j( Y
- g.setColor(Color.RED);
5 T' h. X; B! I2 z$ k) J8 ]/ `+ J/ { - g.setFont(font0);% c; i9 O9 z. M
- let str = "晴纱是男娘";% Z* R( B- s4 Q3 ?/ I
- let ww = 400;
; k# X; }/ q% V# n - let w = getW(str, font0);
- \* x: [/ p# H! y+ e5 N - g.drawString(str, ww / 2 - w / 2, 200);. f% ]7 D* w- b8 q! \- f8 w
- }
3 |: |, k6 O! t+ ?
! w2 F2 s5 t( J: n, H: I+ L/ s- const mat = new Matrices();' ~7 Z9 r9 B3 Y$ h
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
9 s8 ~! P X; ^* |( q2 g - let info = {
6 Y( R5 ^7 l! B" F - ctx: ctx,
# b* P, a$ U6 F" f - isTrain: false,. G% a# ^2 [4 S+ t7 _' U
- matrices: [mat],
: t) v( l e3 T8 r% z4 G - texture: [400, 400],
3 S4 s, \4 m: z - model: {9 ]; N6 _% @, V1 C$ V9 _' H
- renderType: "light",
9 v. J, ~8 g- X/ V - size: [1, 1],
8 t i' I \ B8 s S1 u - uvSize: [1, 1]
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- }0 l# ^, H' z2 W1 h
- let f = new Face(info);$ l; @' {& w M0 w i
- state.f = f;
/ z7 L$ o' n" _0 o$ m" V - 5 j) Q! g: K0 L! G7 ]) e9 I+ v3 B
- let t = f.texture;
! U# N% T; k0 A1 u' f - let g = t.graphics;" f1 L/ b6 v: u2 ?) A
- state.running = true;3 V e$ N5 j% h; N: M
- let fps = 24;
- [/ a: [9 F4 H* W* b0 v4 k. N - da(g);//绘制底图
' h5 F+ U/ |: E% @# L% e2 @ - t.upload();
, X6 N9 o8 u% @! A - let k = 0;, m, g, [4 f0 W
- let ti = Date.now();
3 U1 H8 N- M" Z4 K' k9 `6 v - let rt = 0;
' W* N6 W$ x# m g; n, ]4 Y1 T8 D2 s - smooth = (k, v) => {// 平滑变化
6 }& `6 g2 ~ O. G$ Q, _ - if (v > k) return k;2 ]- J6 m9 X5 t* W
- if (k < 0) return 0;4 z1 W2 @/ S/ m/ ^$ T6 `7 l
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- f8 c1 a! B W- A; G: r
- }
, ^3 n( K( c8 W - run = () => {// 新线程
5 b# _, P v7 O$ P - let id = Thread.currentThread().getId();
/ D( a/ }3 T8 R; `# t' ~ - print("Thread start:" + id);8 ~& J0 l: A, y _$ `
- while (state.running) {( a8 B; [# ~: p7 E8 g
- try {
3 a2 F) a) ^3 C2 b - k += (Date.now() - ti) / 1000 * 0.2;3 @+ x7 p2 Y: w
- ti = Date.now();
1 q( y9 Z1 N# R1 g8 W4 r1 H. N+ w - if (k > 1.5) {
7 Q5 ]( j! U+ T2 g% n% o - k = 0;
! F( }# l5 }$ j7 s* f - }
d S8 }8 F7 L+ y) \, }1 { - setComp(g, 1);
7 H, o. P2 Y) w+ M0 J5 b5 \- C - da(g);
% L1 e2 r: x0 `2 p4 } u - let kk = smooth(1, k);//平滑切换透明度
) [$ |; R. Y1 X: Z4 H - setComp(g, kk);& i4 [1 C6 I7 z3 W. S* e+ Z5 L$ T& S
- db(g);+ S$ `: o$ ~' i. N. Z. u. }0 |
- t.upload();
* Z$ ?9 _) g6 E* Z6 T - ctx.setDebugInfo("rt" ,Date.now() - ti);
, U8 `/ } a1 o, b) A- \ - ctx.setDebugInfo("k", k);
# C: [* N! r }- c& X) ?3 ]- V - ctx.setDebugInfo("sm", kk);
1 O: x! r! m/ a2 n3 d# ~; B - rt = Date.now() - ti;. i o! S0 ]8 h# L% K
- Thread.sleep(ck(rt - 1000 / fps));$ {6 {) N! _3 l/ X6 Y O
- ctx.setDebugInfo("error", 0)
# d" {& v' c7 W3 }, q* c$ x - } catch (e) {/ \+ o' E+ A! Q3 s2 }4 J
- ctx.setDebugInfo("error", e);4 B. }+ B! f9 L0 [5 M/ k
- }
5 a. c; t) r' k5 O5 B: @ - }
) S. q3 N# H2 ?( i - print("Thread end:" + id);
# b3 \0 ^2 e+ X7 ?. |+ N3 o - }
' t# R7 y w6 q8 Q& N2 Q - let th = new Thread(run, "qiehuan");
9 v2 a, Q4 y5 }! R5 e5 a N$ T - th.start();
) a1 l' s0 w8 i - }
0 a, S4 t' M1 y1 ^& @6 b) H, M
& A8 W+ I( g9 p4 P4 V0 E; y- function render(ctx, state, entity) {
: W# y0 o8 h7 [2 H - state.f.tick();
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- 1 b/ w$ q1 M, [9 F2 i. \3 V
- function dispose(ctx, state, entity) {; q5 a$ s# ^2 ^, N X3 A# ?: t/ k
- print("Dispose");
& @% p- o9 `2 r2 _# H+ T - state.running = false;
8 `7 ]5 w! V* U, s - state.f.close();- j0 m+ X$ G' A" H! c
- }
$ j4 N! ?. X8 e: A
; V! I. g( _5 H* {0 V; F) a- function setComp(g, value) {
% K+ o7 [# n* y& K8 f% c - g.setComposite(AlphaComposite.SrcOver.derive(value));5 ~( r S C2 W' a
- }
复制代码 ) R+ G! [) x7 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。; N; n0 I, ^! T( i) x! p1 P+ y
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! F: G% @/ [! s' h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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