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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。8 T, ?5 I4 X: F- ]$ R, y4 M
- importPackage (java.lang);4 t& i# f5 ^, J, c, j I
- importPackage (java.awt);8 B9 V8 }: x! _9 q% x
- ) O- M( A5 {6 T! ^& ?
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 x8 h, G: y8 V# j/ a1 N
4 W' m7 I S2 e& @; h- function getW(str, font) {
& i9 I! h( I' o5 w% I7 V E - let frc = Resources.getFontRenderContext();
; T9 l2 H9 } s: `5 r - bounds = font.getStringBounds(str, frc);
; K& z7 b' s5 g5 x) x - return Math.ceil(bounds.getWidth());
: v/ _- H8 s7 q$ o. c i - }
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( d) y' L4 e7 X+ r) K$ j5 w- da = (g) => {//底图绘制
1 L m# |' f: q# q - g.setColor(Color.BLACK);6 @. q8 X% @+ ^' |' v1 q
- g.fillRect(0, 0, 400, 400);
7 X7 m* q: H8 ?$ V' i* Q - }
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- db = (g) => {//上层绘制9 i. V, W+ S X# s2 j/ ]1 g
- g.setColor(Color.WHITE);6 y, |6 b, g' \( c# q, n
- g.fillRect(0, 0, 400, 400);
1 ? W2 f- S& S* ~ - g.setColor(Color.RED);
, K x% Y3 F Z - g.setFont(font0);! Y% O+ n t( z, j7 A6 i
- let str = "晴纱是男娘";
V7 P1 q& ~8 l) P. h a - let ww = 400;9 E. h( _# j; G& U
- let w = getW(str, font0);
4 ^4 r9 ?4 H- x/ D - g.drawString(str, ww / 2 - w / 2, 200);
4 v( H5 ^5 }! x1 R - }
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) N8 y/ _6 J9 ]# O5 J2 s- const mat = new Matrices();' b# ?+ x$ [; Z0 ~
- mat.translate(0, 0.5, 0);
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% g# h7 o+ j4 t9 l9 A4 k( i- function create(ctx, state, entity) {. z( s& K! t* X( |4 o
- let info = {
' O" Q" D' ~. D- i2 M0 M- I - ctx: ctx,. C: @2 a! O) c( H% X7 ?
- isTrain: false,8 p" a( R( O& ^# } R) V
- matrices: [mat],
4 {9 ]4 j8 {' w! d. ~ - texture: [400, 400],
6 ]: i7 B# b4 b3 {8 i3 g, { - model: {) {9 M9 Q: F8 J* t6 k
- renderType: "light",
. m" V8 [7 {$ v8 ` - size: [1, 1],/ M" e* H3 R8 Z p5 h
- uvSize: [1, 1]
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- } @/ N) m; I0 t2 r/ q% g
- let f = new Face(info);9 W! P) S X* `9 p6 V
- state.f = f;
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- let t = f.texture;0 b& N4 G' ?' V, S% v, @
- let g = t.graphics;
# s( p' J+ V8 G9 b5 } - state.running = true;: Z. I7 Q E# { H/ o% P6 V1 x
- let fps = 24;
( x3 @) ~6 L; S) T1 G - da(g);//绘制底图
j/ t- x9 d5 D0 L - t.upload();
* [7 \) L) \* K& P/ w5 m& ? - let k = 0;# `8 Z' L* ]1 |
- let ti = Date.now();
: b3 ^( I, h' d; c - let rt = 0;1 I5 W2 {% t8 e8 v3 X& S* W
- smooth = (k, v) => {// 平滑变化
) s$ ?7 W6 H. f5 N5 N - if (v > k) return k;
! M0 w2 Y1 i8 y! y6 r% b6 v# \ - if (k < 0) return 0;; S0 ]# G/ [4 V+ S8 P! n
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
8 U; g K7 ~; x# r) q9 Q" A - let id = Thread.currentThread().getId();1 h' Y$ v9 [2 Y$ f" B
- print("Thread start:" + id);: ?6 G) W6 h( ]0 y8 L
- while (state.running) {
4 k6 |8 b# ^4 r/ G5 ? - try {8 B* @5 U4 s+ |' d9 U4 ]: j( H
- k += (Date.now() - ti) / 1000 * 0.2;
; B6 G" `! v% f! e. ]& J9 K - ti = Date.now();- [0 r4 r2 r: A7 i+ g' [
- if (k > 1.5) {
& \3 t7 m. h: M - k = 0;
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- setComp(g, 1);
- c5 Q3 G$ p. J, ^/ v) Y - da(g);* y) {0 W V; O, P3 m4 S$ H. |% C
- let kk = smooth(1, k);//平滑切换透明度
4 \! s* z. S6 m- R - setComp(g, kk);& }$ @% f+ r7 C# [/ J% m
- db(g);2 J$ A$ A5 k0 y2 e) U7 }8 }
- t.upload(); i) q/ A0 g7 Y4 [/ r
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( P) ?' |& B b3 ]0 x7 } - ctx.setDebugInfo("k", k);
' m' i! \ j8 L& e - ctx.setDebugInfo("sm", kk);
- ?, c: v! R4 K0 r% l8 j7 S* p+ L - rt = Date.now() - ti;
1 `8 {% E( ]' j- b - Thread.sleep(ck(rt - 1000 / fps));
$ A) |, L! M! D - ctx.setDebugInfo("error", 0)2 f0 ]# q4 P" X4 P- A
- } catch (e) {
9 A! l' C5 d1 j5 z' w - ctx.setDebugInfo("error", e);% k; _- D9 ?& p: E1 u5 ?4 H/ @: s
- }
, r8 | L8 |! M! Q$ C. u. p - }
. r; H) e9 i0 I' c+ y - print("Thread end:" + id);9 K, K5 ~" O/ k, h5 N) o) {0 k% h
- }) b. h& G" ^. ? |6 s' w
- let th = new Thread(run, "qiehuan");% S, i7 s& t/ J5 g
- th.start();
9 C M+ }0 r! `; Q# f1 B/ J - }
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, M- H2 _4 h8 ]0 d8 Z: |- S- function render(ctx, state, entity) {
: ~0 S+ z3 _3 s e2 M - state.f.tick();
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/ M [/ }0 ^+ s! m0 y8 V- function dispose(ctx, state, entity) {+ Q8 ~" y6 x8 l8 U! g1 [; x* v6 d
- print("Dispose");
% P! S! l2 ?% F2 Q% l. Y' c6 i - state.running = false;4 {9 O2 D+ ~: r; ^! J2 t/ |1 A) n6 U
- state.f.close();1 I5 R$ B5 `- A- \$ X
- }
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0 B6 G2 f0 O& z& b8 }# y3 \0 T- function setComp(g, value) {
: Y' R# ^4 K$ ]- [1 k - g.setComposite(AlphaComposite.SrcOver.derive(value));9 |( B0 e' h8 w F0 W- J% R% a
- }
复制代码
0 k8 I* `5 ]4 _- I7 V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)
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