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) \( L, I7 |6 s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。# V: [ W. c& y
- importPackage (java.lang);* i" }5 C8 c2 N2 b9 Z7 ]4 G" N# g c
- importPackage (java.awt);5 p, `/ S. B& j6 j5 ^; G; @
5 D( I L3 S1 _8 w5 f- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 k; s- V! ] O2 k1 v! p
- l: Q; w f% q. Y# h8 V
- function getW(str, font) {7 O6 B5 T: h- n: K
- let frc = Resources.getFontRenderContext();) ~# Y1 u& r* W! {
- bounds = font.getStringBounds(str, frc); e# ~$ t0 m& N+ V# b( b4 b/ L3 a: l8 Q
- return Math.ceil(bounds.getWidth());/ C: F9 i" `8 U5 a8 u! H7 X
- }
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- da = (g) => {//底图绘制
" Y( ~+ g4 \, r% w8 T9 N, ^+ x - g.setColor(Color.BLACK);! F8 P. J( D! ^+ C4 B5 S! R
- g.fillRect(0, 0, 400, 400);
4 o0 E' I. W; _% |4 c/ U9 [ - }
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6 B) J9 L, w. @- db = (g) => {//上层绘制
9 z. P: T) g- i% \, }" y* Y - g.setColor(Color.WHITE);7 `9 v) H- `) n. B$ U& Q
- g.fillRect(0, 0, 400, 400);
7 q% I0 X1 H) `7 Z* P - g.setColor(Color.RED);
1 O/ w/ \$ }/ ^: i7 n) Z { - g.setFont(font0);
+ F- s! J/ ]2 U5 X: a' ^ - let str = "晴纱是男娘";9 ^7 p4 X: {- s) ^4 D, }
- let ww = 400;
5 D1 V; X) v( _- @0 x - let w = getW(str, font0);, f7 Z: i9 i* u. W( h* @, J* j
- g.drawString(str, ww / 2 - w / 2, 200);! V* S _/ s7 y3 v! m
- }
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; U, N2 V. P$ N2 K- const mat = new Matrices();
; v- x! q, e+ o8 ] - mat.translate(0, 0.5, 0);2 l* @4 Q. k& L4 s$ r
/ j1 h& t" B/ o3 b) N' ~- function create(ctx, state, entity) {- @ ]; e$ |5 L8 ?1 L7 O: Y {* A) n& y
- let info = {
/ x0 g$ H; H1 e5 r+ A; W" Z - ctx: ctx,
3 M+ d5 i( U/ U7 R, H% X. W - isTrain: false,! Y6 [6 J5 q) n5 `: Z
- matrices: [mat],7 B( w; }" p3 |: x) {/ k( C+ z& F
- texture: [400, 400],
/ k0 y) M% A! T# x4 N - model: {
0 z" J9 J7 x+ I/ T( [+ `! j - renderType: "light",
& j" w2 h8 Q8 @; Z, ]# S: l6 O - size: [1, 1],
; S8 |5 Q9 F8 }0 ` - uvSize: [1, 1]" W2 b$ a( h) c, ]& ~+ Q
- }
* p& R6 M+ n+ J; ~ - }
4 r" W8 j. F) T2 Y! d - let f = new Face(info);
0 l: w" K$ m/ u m o - state.f = f;
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/ H( o! j2 c, A- let t = f.texture;
$ b, C: Q+ q7 p$ @ S5 S6 F' K - let g = t.graphics;2 A. I+ [# e! x3 o
- state.running = true;
2 Q/ I( q: U, y, l - let fps = 24;
" r( i4 @6 e" T3 o - da(g);//绘制底图% n) K1 Y% A" j% K
- t.upload();
. g% y6 I) k, R, F& b! @* y. s - let k = 0;
0 s2 v3 Y' h0 b0 H# N# p6 l - let ti = Date.now();
Q- p; E* s& @1 Z: H- L! O - let rt = 0;) L+ e" |6 z3 Y4 F; `/ d
- smooth = (k, v) => {// 平滑变化* d+ {9 @. E1 L7 i( l
- if (v > k) return k;
9 O5 ] U7 {6 W; U - if (k < 0) return 0;
+ P! D" O5 x2 c( @9 `* J - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 J! z2 f3 p1 o- T9 G! L3 a# a - }
; r! g- e( p9 d9 N( \9 G# D - run = () => {// 新线程' X7 G# U: {! T8 |
- let id = Thread.currentThread().getId();
. G0 |! [5 ?4 ^! | - print("Thread start:" + id);1 H3 A) Q5 m( @9 B
- while (state.running) {
. X7 l! T v0 {: d; T8 |: M: ? - try {
+ \' ]8 t( `: J+ }& p0 Z - k += (Date.now() - ti) / 1000 * 0.2;
6 M7 T3 b- I5 _# A$ I - ti = Date.now();8 \2 X7 J) G6 n% h' `
- if (k > 1.5) {1 ?9 \. {5 ]! B1 r3 ]
- k = 0;$ q1 I0 C) ~4 }' u Z0 l
- }; v, H7 e5 ~% g! Q6 \
- setComp(g, 1);
5 f5 g; a, N+ V, @8 U - da(g);+ p, y. C" b0 s5 _! y( M: F$ Y
- let kk = smooth(1, k);//平滑切换透明度6 {( E9 R) \0 q1 _( q
- setComp(g, kk);) K% o | j2 ~# M8 z( ^4 r$ v( c T
- db(g);
- k' E' d8 w$ B( O+ X3 P5 B: d; r; r - t.upload();
7 N9 G0 d, h7 M( @ }/ K - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ O$ _! F, ~4 Y& [! ?' T - ctx.setDebugInfo("k", k);
% {5 r0 \0 v3 `* }/ }4 l# q" E9 X - ctx.setDebugInfo("sm", kk);
9 ` g& \# {4 F$ l/ q4 `( Q; `, j - rt = Date.now() - ti;
# X9 P2 Q. }; S6 ~7 B - Thread.sleep(ck(rt - 1000 / fps));
0 _' Z7 P+ B1 X4 Q0 ~: y3 J0 Q - ctx.setDebugInfo("error", 0), Q, M, q) E b# q
- } catch (e) {
4 |- {& Z; |2 a2 o& j) U - ctx.setDebugInfo("error", e);5 j+ y1 Q5 H) e7 Y" J: I- N5 ]
- }' b; W$ [2 C' w( s( D
- }
9 Q3 |7 b6 ~! l- `* g* l! [ - print("Thread end:" + id);
O q8 s+ ]4 K! v - }
: M; T. h6 ?5 p( Y1 S - let th = new Thread(run, "qiehuan");4 O( l8 w6 ] e/ V" y, g2 ?
- th.start();# ?! `2 d% P" @7 P
- }
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- function render(ctx, state, entity) {' I8 x5 H5 R1 Q3 L' Q
- state.f.tick();8 B) I4 I5 U0 F) W4 R
- }0 F& h9 T9 \0 ]
- 6 Y! b- k) s3 z' _' B' e
- function dispose(ctx, state, entity) {
$ J4 v) s0 _- m# Y: L! m - print("Dispose"); H' U* s" n4 M4 j1 t
- state.running = false;8 @8 Z" B& ?2 U- N7 ?
- state.f.close();
% e) s" H+ ` W) ]" @0 S$ ] - }
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- function setComp(g, value) {
, d s9 O( M% K. F - g.setComposite(AlphaComposite.SrcOver.derive(value));% u% H/ ^# Z1 Y
- }
复制代码 ( E' ^& K7 X# G9 z9 S/ Q% v" h, I9 H
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。' u' o7 w' A% i: X& b* ^2 ?' X; s
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( R, v7 F+ M6 s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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