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s8 Z: Y c/ U) y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。! b' b0 N& x" G9 V' B4 i; x U
- importPackage (java.lang);* T! C4 P9 d: G! Y7 ?3 b6 _
- importPackage (java.awt);* J, }, ^0 z. M4 m8 _
' Z9 p( a4 W- T. o! |0 o- include(Resources.id("mtrsteamloco:library/code/face.js"));; y2 S' D( M3 }2 O" u9 P# z6 t" @
1 d; e0 v. f" j: Z7 b( S8 [- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( }; ~: m$ i3 q2 R: ]$ H/ m
- I# c$ J0 ~( V
- function getW(str, font) {
( a- n) q3 ^2 o/ z3 t& } - let frc = Resources.getFontRenderContext();; i- k n$ A3 i: O8 M
- bounds = font.getStringBounds(str, frc);
/ r: P T, y9 C }9 g - return Math.ceil(bounds.getWidth());5 f0 x/ o" X* J) U+ }+ u
- }
% ~' [4 i' t* @0 c; Y! L+ W) D, B! A - ' D1 y8 `' O8 d# |
- da = (g) => {//底图绘制
6 V( B% H# S1 i1 K5 H! Z# F/ j - g.setColor(Color.BLACK);
0 b; ] v' t2 P9 Q7 @ - g.fillRect(0, 0, 400, 400);
: B" y" F7 k! B! l8 s$ z) p# v$ d$ ~ - }
6 m' I( g! [' ^. p- B9 z# p4 E( X1 }
) ]3 v' x9 R! Q- {- db = (g) => {//上层绘制' X9 R4 u( S6 O! T* c# L
- g.setColor(Color.WHITE);
6 a& x. ~+ d7 U0 e* } - g.fillRect(0, 0, 400, 400);
% r# \: j" P4 f$ d1 Q, V+ j9 X5 T5 y - g.setColor(Color.RED);( Z5 W& G2 d; H- E
- g.setFont(font0);
% {7 a# z, v+ O& u' a4 L - let str = "晴纱是男娘";7 t1 i9 ^% o: ?4 F
- let ww = 400;
$ W% w* O7 s7 Y( G( S - let w = getW(str, font0);$ Y9 A" Q! ~0 a: d% ^
- g.drawString(str, ww / 2 - w / 2, 200);
9 {) K' B9 o: `& I - }
! S1 Z0 D& J) L. q* g' u
7 G9 r/ I! u/ z3 a% H- const mat = new Matrices();
! w$ g" ~7 `/ [0 G8 j - mat.translate(0, 0.5, 0); @, Q' P- d, K
8 b* z/ f2 L0 m: V- function create(ctx, state, entity) {2 P. |' n# A5 {( k5 Y) c/ t2 n9 T; p
- let info = {
- J4 g' G. p+ Z5 H - ctx: ctx,* J6 S8 c% ~3 L
- isTrain: false,) V a n9 p: u% R
- matrices: [mat],9 Y' h' I$ S2 j. M, v9 a$ @
- texture: [400, 400], [; k1 B2 @# H4 ]1 }, p
- model: {
( R' v- m( M0 L+ U% u1 h0 t- m - renderType: "light",! E! f( W& g$ C- Z) u
- size: [1, 1],4 C7 t! e A5 l# x
- uvSize: [1, 1]! G( N7 n, v1 Y
- }
/ j2 A# T' K4 k0 @' S) @; x3 _* A - }3 a4 z m5 {2 o
- let f = new Face(info);9 {% [, D( n5 [4 s
- state.f = f;5 P& E0 u9 V- l$ L. W$ L
- 6 U* c1 W3 b: K. F
- let t = f.texture; h1 g# L$ l6 Y6 B0 j
- let g = t.graphics;
' R. y1 _5 j ?0 Q: J7 K - state.running = true;* m3 u* L( w0 c! |( G | y+ T6 C
- let fps = 24;
: P# f& b, {) m$ _' F. L$ E - da(g);//绘制底图" O, v+ c2 `% K
- t.upload();) t( F% B0 W/ z! G4 [3 n
- let k = 0;
( d% f. @6 C" I - let ti = Date.now();1 f7 U X7 R$ j$ b! X
- let rt = 0;' e+ [" e4 l. Z- U' }" P
- smooth = (k, v) => {// 平滑变化
6 C9 w# R* h8 n' X5 ]1 X - if (v > k) return k;
. g, t: f: Y: K$ h5 ], {) K \- l - if (k < 0) return 0;* u, x( O( O y+ ^2 k; F" |/ k, N
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" q7 G5 @6 @& O; N4 i S - }
1 H+ `' Y! E+ I! j, x1 p& T - run = () => {// 新线程: ^/ b5 L* C1 Y5 m. A
- let id = Thread.currentThread().getId();$ o) C6 s$ i# o+ @/ }8 |# j! E
- print("Thread start:" + id);$ E$ u4 e" v' ^3 b- }7 H" A5 A
- while (state.running) {
- p6 c, d+ ?- f4 T4 d( {7 \ - try {
1 f* ]# P2 `; E7 Y$ x9 h! X - k += (Date.now() - ti) / 1000 * 0.2;
, V% y- M5 C. y8 w8 A! e - ti = Date.now();
2 ]8 _) d0 ~3 V9 l8 O: e - if (k > 1.5) {
9 T4 p; {" U& L+ `, f1 \5 q - k = 0;
8 V+ ]7 T1 `& J3 x3 E- O* F - }2 x* c& N7 _% {, a; V( e/ y
- setComp(g, 1);
% p& |% j) j0 N - da(g);
( I+ R; u& ~3 l$ _8 h9 r* G( Y - let kk = smooth(1, k);//平滑切换透明度
5 x1 `% O4 N1 Q, w. J+ [ - setComp(g, kk);- R$ ~) k, ~/ o- D: c4 E7 B
- db(g);
7 E: B8 x% d' U - t.upload();! Q7 `' h6 {' _' T
- ctx.setDebugInfo("rt" ,Date.now() - ti);
4 X4 {4 X A0 k4 L/ x+ g5 Y! D* q4 W) U - ctx.setDebugInfo("k", k);
* K/ _4 O) Y1 V% F4 `* Z1 J9 m - ctx.setDebugInfo("sm", kk);
+ V" A+ N8 \( S( C - rt = Date.now() - ti;9 W6 r4 v6 H4 _7 A5 A6 V) G" X
- Thread.sleep(ck(rt - 1000 / fps));
3 M8 E, w( _8 [! Q - ctx.setDebugInfo("error", 0)
# s8 w) S) I* y9 e" f @2 v - } catch (e) {+ [0 C2 g& c; q( S% X3 L0 t5 m
- ctx.setDebugInfo("error", e);
( _% Q+ o9 x& U) c9 s5 {" R% b - }5 R, o3 @5 z' x2 x8 y- d5 z, ?! i" O
- }
3 j6 |+ g+ ^" x; \5 { - print("Thread end:" + id);
% h. G8 C$ R r [ - }, X: `1 |& h$ t
- let th = new Thread(run, "qiehuan");
' z; S# {! F& T* e' u: x' R - th.start();( D& r; L2 d% J/ R
- }
: Q3 F3 \7 _( _; C
/ H7 M2 M: k% c3 N) J* y- function render(ctx, state, entity) {
$ A; s7 n8 O9 N5 C3 U - state.f.tick();
) \) r! \% q( M1 }0 `- | - }$ N9 _& m: ~& ?$ \
# k& m4 p, {6 z5 k- function dispose(ctx, state, entity) {8 T0 v4 L# z- \$ n8 v2 V
- print("Dispose"); ~+ r1 x8 \: j" W/ m
- state.running = false;( P0 P5 l3 ], d" a. F! m
- state.f.close();6 j; D1 f) T+ h
- }1 K3 p8 v$ x- l7 t
- . J3 }5 n( F& F: T W/ a
- function setComp(g, value) { {& G5 Y7 Q+ z' W, ^; b
- g.setComposite(AlphaComposite.SrcOver.derive(value));
, ?3 y6 N, q( d* ^1 D6 g' Q1 T8 r: C - }
复制代码 4 X. W8 Q& x: W' a h1 }; B+ z
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。
; v0 I1 x* X. b4 S4 v4 W" c9 C
4 B; X( B4 u7 S" T+ ~4 e顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& B; \ f9 u" o8 P. }
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