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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。/ Q l% o; Y8 e' j
- importPackage (java.lang);
3 A4 @# j$ Q+ t& z8 B% M - importPackage (java.awt);. c; {" L1 N# @3 D( e; l
8 j* x- q$ R( |+ x5 a p- include(Resources.id("mtrsteamloco:library/code/face.js"));! m; P D' a y9 J
E: G, [8 d5 x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: W1 X; L: ~( N+ S' g" R! P- function getW(str, font) {% A5 W$ N8 }8 r& R% I
- let frc = Resources.getFontRenderContext();
5 o+ L; f/ }$ ~( ~3 { - bounds = font.getStringBounds(str, frc);
* U# F2 Y2 ~& I2 |5 I9 k - return Math.ceil(bounds.getWidth());* x& A- i6 ?) \6 s: ]* R
- }% R5 Y b# c- p' e9 a( w7 k
- . y6 N& f+ W- ~$ e
- da = (g) => {//底图绘制
: b9 f3 Y- I1 Y) J2 x - g.setColor(Color.BLACK);
" Q8 m% e8 r: L) B/ C4 E+ o" Q8 s [ - g.fillRect(0, 0, 400, 400);( b4 S. Y5 E+ L2 U+ j K
- }9 z& ]( \! s3 R/ ~
2 i3 X5 {4 V4 O- {! Y- db = (g) => {//上层绘制( E+ o( f) g! X7 H
- g.setColor(Color.WHITE);
4 o2 W/ k& [0 t5 C$ N: z - g.fillRect(0, 0, 400, 400); E. M. ~3 a# B( D. |* q
- g.setColor(Color.RED);
' h) {: i' \% ]3 s9 q* _ - g.setFont(font0);2 s# i6 ?3 x$ E3 Q' i- a% u0 \+ z
- let str = "晴纱是男娘";8 j8 d; ~) C0 Q
- let ww = 400;" q" k, [3 l8 c' Q4 \
- let w = getW(str, font0);" p% a; a7 B# W* Y; U
- g.drawString(str, ww / 2 - w / 2, 200);( E2 \& n, D8 C- |8 R$ e
- }
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9 j- W6 S% d6 {6 |. M7 L( o8 k- const mat = new Matrices();
8 r& L& d6 t$ ]# { - mat.translate(0, 0.5, 0);
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6 Q! F# y/ ^3 C% {7 m- function create(ctx, state, entity) {: m0 k" _8 T% `" u
- let info = {0 {9 s% B: d6 _. i4 b* N1 g9 a
- ctx: ctx,
l+ w2 `8 m% C. H' ? - isTrain: false,8 x: x) t( n* d4 u# L5 L, Z6 A
- matrices: [mat],
# S) T/ v. c* ?5 O. ?2 J, r% r0 e& H( U - texture: [400, 400],4 q" O' P5 O" z! |- p7 }
- model: {9 H7 i+ r9 I! k( d* P
- renderType: "light",, o/ `& z! }3 x9 c
- size: [1, 1],
; x8 d* O" q4 j. B& ~$ h - uvSize: [1, 1]
9 t+ g! h6 R# _; E! n# U! T - }
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- let f = new Face(info);! Q* v) o' q5 t2 J/ s% x2 r
- state.f = f;
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4 Y4 _% `1 V" p6 `8 N) e5 f6 p- let t = f.texture;3 W; {3 M% H! K
- let g = t.graphics;
3 j7 d4 \3 k* K - state.running = true;
2 d O n$ D& ^" W5 Q& L& w' C4 J - let fps = 24;3 @" `7 r8 n1 S }
- da(g);//绘制底图" ~7 J* ^9 o* m* a
- t.upload();
0 v% D; g( P! d - let k = 0;
! Q: H1 R2 f% |' y$ x( H - let ti = Date.now();
, Y0 M4 Y/ }9 l: A; @- ~ - let rt = 0;
/ i; N' W: S8 x0 Z- Y7 h+ D - smooth = (k, v) => {// 平滑变化
) x9 D$ D9 o4 z/ {7 d! ]% S0 q3 }* } - if (v > k) return k;4 q0 g2 x! \8 a# o
- if (k < 0) return 0;5 y8 }* V4 l: c. f. F2 c
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% W# }- i, `4 r0 S8 Y E Q: @# c - }
% l/ ^% _3 Y; N: S/ c8 U - run = () => {// 新线程
4 e( l7 c0 p$ l6 Q3 u4 M2 j - let id = Thread.currentThread().getId();
, A. w' x; ~+ G$ _. p' C3 n - print("Thread start:" + id);
6 w& W7 [/ Q: Y2 T r( N - while (state.running) {' T8 R3 b9 e, t
- try {1 T1 m7 f6 U1 `- W& U9 O
- k += (Date.now() - ti) / 1000 * 0.2;3 W/ Z# m2 L' x
- ti = Date.now();) D* b3 N. L, J5 H0 {
- if (k > 1.5) {6 Y7 q1 H, D# e
- k = 0;# r4 v1 G7 V# n# X7 ^
- }& s4 L R8 _9 g/ i& d
- setComp(g, 1);; ^( ?$ K5 R' z9 N I/ Q
- da(g);
3 [! V% h) o! C5 R9 F - let kk = smooth(1, k);//平滑切换透明度
* N7 C5 w! H( P" i5 D" E - setComp(g, kk);4 N5 m) @& R/ d6 h
- db(g);
7 @7 q: Q& S/ p; @; W$ M+ v - t.upload();- g' Y& C4 e0 X& c0 o0 l
- ctx.setDebugInfo("rt" ,Date.now() - ti); ~# i+ j. _7 G& C2 D& [
- ctx.setDebugInfo("k", k);
; }) O6 A" U" J p% ^" k - ctx.setDebugInfo("sm", kk);
' z$ F7 x2 G s - rt = Date.now() - ti;8 n; E, h" C8 p' r% L1 f" @' X* Y
- Thread.sleep(ck(rt - 1000 / fps));/ H m5 ]3 r' _
- ctx.setDebugInfo("error", 0)% k! C0 K$ y* S
- } catch (e) {
* f1 h# \6 l2 {' H) V! r( M7 s - ctx.setDebugInfo("error", e);7 r# X& a9 X+ e3 o. d
- }/ b/ G" N E" K; q/ C' q( t0 E
- }
! q" Z" t/ E: s" E. Q8 q) i - print("Thread end:" + id);4 x+ r1 j. }6 r+ Q( {7 Y+ ^$ t
- }& V6 |3 r O1 ]5 E! I- v
- let th = new Thread(run, "qiehuan");' n& y! q3 p& s. D
- th.start();
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- ) H/ e5 S- R7 k+ u* q* B
- function render(ctx, state, entity) {$ ~' Z: G) t+ X; R! h' H
- state.f.tick();
5 h0 E, S$ n, i5 j( W - }
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4 p* }7 j$ ^- X& t' M( y0 A" N" d- function dispose(ctx, state, entity) {- K" x5 a5 ?& F1 p
- print("Dispose");* @6 `5 _8 U8 D {& v, Y. j
- state.running = false;
% _# y# h W6 w4 _ - state.f.close();
% \' D& o8 @- s - }
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- function setComp(g, value) {
/ _2 m& Z l& ?2 y2 t5 E - g.setComposite(AlphaComposite.SrcOver.derive(value));
: C& T# r( S7 E - }
复制代码 ) j1 d2 e! y' v0 j0 k" n. J; @+ 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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