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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。
+ u& J2 ?) a6 _( y3 J/ h$ b: O- importPackage (java.lang);# I7 G ]/ \; ?3 @
- importPackage (java.awt); A$ a) \/ f7 L5 V
- ' ~# ]6 S; R ]$ ^* n; M
- include(Resources.id("mtrsteamloco:library/code/face.js"));# _! A1 r% o# k
- - d6 H2 i ~. a! V
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* w6 m& X0 h" n4 f* H; K; L
* J f7 @/ P- }6 M0 [- function getW(str, font) {
/ t6 [/ v5 M3 i2 z4 |9 q - let frc = Resources.getFontRenderContext();. L2 e* Y* C Y6 m) \' h
- bounds = font.getStringBounds(str, frc);
) m" Z# U& A" S$ S/ ] - return Math.ceil(bounds.getWidth());3 l6 Z0 K r) K1 t6 O, Q
- }
0 ], f, q* T8 k4 f+ t2 r - 7 g8 @1 [' B! G
- da = (g) => {//底图绘制7 _/ [2 y6 \) `2 d% B5 p
- g.setColor(Color.BLACK);
- \ l7 a' b' x& j9 I. T - g.fillRect(0, 0, 400, 400);8 F* ^' b0 k' G: l
- }+ J) X" r' d# E9 C2 |
- 3 m2 ]) v, T9 h1 J2 L, R
- db = (g) => {//上层绘制
' N z5 R9 i( Z6 u$ b- m8 g& a( h - g.setColor(Color.WHITE);( v2 ?1 r. B- Y2 T$ v7 A- b
- g.fillRect(0, 0, 400, 400);1 W. d( z8 o6 K' [6 G
- g.setColor(Color.RED);
( @3 s9 z) ]* C2 a9 h* [ I - g.setFont(font0);
9 j2 q/ v; o7 x, `2 |, Q# z! s3 @ - let str = "晴纱是男娘";
4 g. ^- a& X. r - let ww = 400;
- G) Y0 R! g. w& _4 ^' i - let w = getW(str, font0);
" ^* X/ j& ~: |5 N1 }9 W$ x6 D; { - g.drawString(str, ww / 2 - w / 2, 200);; G( O% O2 b( @0 ~4 W% E/ I" K
- }* ?+ p1 X6 d0 n7 v
- : V c, l% Z2 T" s/ S6 T
- const mat = new Matrices();5 w6 p. \) I' N: s/ K
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
; E$ [+ c: h" _ - let info = {) b! K5 v! j- W
- ctx: ctx,
# A R, w* O0 d& T - isTrain: false,
( z6 b7 J/ _, _7 S - matrices: [mat],9 w4 V/ B9 K% O* @( i/ S
- texture: [400, 400],
z6 c1 O' B0 W- N; [ - model: {8 M& X$ _0 n& o0 F
- renderType: "light",6 Y9 M! l0 ]1 h1 d8 O! c A
- size: [1, 1],7 E G- Q+ ^! I& `" }; D
- uvSize: [1, 1]
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- }
`) K: ^2 u3 @* U& Z - let f = new Face(info);0 g; C- C( x1 I1 R; b- L. s! j
- state.f = f;
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- let t = f.texture;
% \( \: |" E, q - let g = t.graphics;
6 i. t! t6 x1 O! X* v J/ V - state.running = true;
& N- C" A+ r! x7 o) A. p - let fps = 24;
3 c8 _, L; I$ |4 ~ - da(g);//绘制底图
* N9 j- i8 ]$ w# w# L - t.upload();
: \$ ?/ T9 R. A2 C: C6 T9 Q - let k = 0;
" g0 Q4 ?4 T% P0 q - let ti = Date.now();: L8 }# X* a6 ^: Z( e: X
- let rt = 0;
) x& z/ d: c/ m - smooth = (k, v) => {// 平滑变化
" t& i- x" s( G$ Z% ^. N - if (v > k) return k;
2 R! C6 ^* k2 U - if (k < 0) return 0;
' b5 D. q' u5 a" S - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! q6 z8 o- B1 w v( R: c; k) W5 ] - }! N% z2 c5 R" O4 h ?
- run = () => {// 新线程
$ ^% Y4 K3 l- e V& N - let id = Thread.currentThread().getId();
. F: d) j( S8 w% f) s$ [( ` - print("Thread start:" + id);) h8 O+ _; R5 ^6 d3 h
- while (state.running) {
" |: s$ L) E* P# T7 q2 \ - try {
% r! y) V) W3 \2 p. J - k += (Date.now() - ti) / 1000 * 0.2;2 A$ A. C* r! q2 K" d) L
- ti = Date.now();6 E; }- ~. ^+ h
- if (k > 1.5) {
& |5 w* \! P7 x+ m - k = 0; R, ^. A m# ~) w$ p4 t# z# C7 c/ l
- }
7 O% e" i& w+ `5 r" n% \- q; n6 k7 D0 ] - setComp(g, 1);; A8 t8 s8 W3 D- j; C4 {& {
- da(g);
, y7 i& Q5 Q! J) X - let kk = smooth(1, k);//平滑切换透明度! V8 T+ k! `7 E" r' ]
- setComp(g, kk);
7 W8 C# [+ T: H8 p - db(g);
# i# B) h$ f$ | F) u5 J* w ] - t.upload();. f* y) x: `( |: V, l- q" r+ s
- ctx.setDebugInfo("rt" ,Date.now() - ti);& Q$ ]& H! F: K1 A) P- ]1 r
- ctx.setDebugInfo("k", k);
1 \8 \ @% S2 _. `# Y" | j - ctx.setDebugInfo("sm", kk);
3 ?) f# q( N. n: i - rt = Date.now() - ti;
0 \7 }+ P4 n4 c: M" X0 ? - Thread.sleep(ck(rt - 1000 / fps));
9 m, I4 B/ [' @& a - ctx.setDebugInfo("error", 0)) p$ |! _& M- C8 _0 K
- } catch (e) {# p f: k2 a) U9 f. L7 j& U% n( I
- ctx.setDebugInfo("error", e);
' ?: @. Q1 O' |6 ? - }; N$ m7 {3 b/ ]3 F% T
- }
4 R+ w9 z7 N$ b% @4 B+ ? - print("Thread end:" + id);' w& q5 \0 E$ Z
- }8 n& j' C5 l ~6 u
- let th = new Thread(run, "qiehuan");0 I6 t% r/ }. y& y1 ]
- th.start();
/ x' W4 T4 y$ N& @3 O6 M - }
d. t/ ` }# H- i& D" u
& P$ I: f& O1 ^+ J+ G- function render(ctx, state, entity) {
, @/ V9 R* ] Q5 M - state.f.tick();
+ J! y- K* u1 M - }% f9 a' r! ?+ B
- ) C/ o6 K( {9 w% a
- function dispose(ctx, state, entity) {
1 B0 f1 X+ R4 ]$ n2 ]/ N3 w7 Y- d - print("Dispose");' c/ I) G. v5 n, E% S
- state.running = false;: ?1 S. Z0 X# W# S* T$ u7 ^
- state.f.close();' d: \! n+ {) d) p/ o7 d+ Y
- }, \* k. e. ]& c- I; o {
3 w8 q, u! G' _/ p- function setComp(g, value) {: X4 P! a* ~& G: s1 _! w0 m
- g.setComposite(AlphaComposite.SrcOver.derive(value));2 X5 L$ }# ~ y% N
- }
复制代码
6 R9 ^* c0 J) H# q6 @: s! G1 g! W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。0 ]5 k% V; Z) n/ C1 F1 q5 K: M& i6 x
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) V! h0 a }3 z2 ?7 p: \' f; D: I* W顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ l1 r' ^5 K4 `+ ~( N/ Y2 ^: Z# F' m
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