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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。
/ ?' L* c) |# X) R7 `6 I- importPackage (java.lang);
0 g+ a K! x. _8 {, v& ? - importPackage (java.awt);/ g8 Z& T8 \) E h
0 `2 V2 {& ^! e4 m& p& L- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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0 v. z9 d! C3 T2 P$ |- function getW(str, font) {
' C! }9 o. s( z! s( D' V0 Q) J4 P: ~ - let frc = Resources.getFontRenderContext();
, k4 \) `+ s0 Q# T# d - bounds = font.getStringBounds(str, frc);
; m' N% O( g2 {, B D - return Math.ceil(bounds.getWidth());
: }7 H' D8 I6 O' M2 w2 W - }
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- da = (g) => {//底图绘制. h3 Z3 ]( }) a1 A4 _4 S8 W
- g.setColor(Color.BLACK);
H5 f2 } V& F4 I9 L v& X - g.fillRect(0, 0, 400, 400);
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- & S& g8 \$ y/ I! W
- db = (g) => {//上层绘制( `! K- E, n' \2 Q* w" ^6 f
- g.setColor(Color.WHITE);* G' `. I' g" ?; @% Y
- g.fillRect(0, 0, 400, 400);
# c7 w+ p- E. C1 U9 `: G# j - g.setColor(Color.RED);
$ D& @8 m4 x$ D, ~& S - g.setFont(font0);$ I$ d4 `' `0 Q2 I
- let str = "晴纱是男娘";' Z$ s5 G. o3 F
- let ww = 400;- h* d' |0 ^# ~7 @ H; k/ Y& {9 V
- let w = getW(str, font0);3 s% V1 t4 Z/ g& ?# `
- g.drawString(str, ww / 2 - w / 2, 200); N/ ~% ?# @+ U4 ~ z) U
- }
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$ S- U0 U. C; i$ u- const mat = new Matrices();
) G- C$ H, }/ ]' h3 t+ T3 B% V& R - mat.translate(0, 0.5, 0);
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4 a* {6 _: q) L- j9 [) u$ V! \, I- function create(ctx, state, entity) {5 m, n- ]# U, v
- let info = {8 I, N9 w: ?; M, t2 d8 J$ S5 Q5 n
- ctx: ctx,+ K2 S; c8 [. H* Q
- isTrain: false,
3 v2 C. C: s2 \! f - matrices: [mat],
$ u: Y2 d$ ?4 S - texture: [400, 400],
4 A8 c; I/ N- ~: Z7 {5 I! b+ Q - model: {
" L1 ^2 M% r' C# V' F - renderType: "light",9 k3 E; A! S. Z& k
- size: [1, 1],# L U7 K5 ]: d' B3 E* j
- uvSize: [1, 1]
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$ z8 _+ q" j; n2 r( m! v& h, p - }
0 Q& ]$ e+ Z; y7 L - let f = new Face(info);) G+ @- a9 l+ ? o
- state.f = f;
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3 }4 W& i1 B7 ]+ W# |6 W- let t = f.texture;/ s. U; m+ U3 w9 x, E
- let g = t.graphics;2 F8 T( i5 F% y- U
- state.running = true;9 }( M7 F! a3 \! G* r
- let fps = 24;7 Y) _/ w. B* O5 f' h
- da(g);//绘制底图" n2 d' |, T4 l6 _
- t.upload();5 z4 J4 F& x8 S" U/ I, V
- let k = 0;4 l. u! H0 H2 E
- let ti = Date.now();2 i6 ?* l! j4 v+ |$ Y* D1 v
- let rt = 0;
- B5 r( y8 X8 S7 H) ]! c - smooth = (k, v) => {// 平滑变化6 c7 i! K+ j3 N- P
- if (v > k) return k;) r, [: }9 T* [& A
- if (k < 0) return 0;
* y' p. q% {7 N( s - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 w( J; Q8 |9 O' }8 [; U( A' L
- }
6 J& X: J) N$ a2 B( z- o& A - run = () => {// 新线程
! H' Y \' w; D/ W6 q6 y - let id = Thread.currentThread().getId();
/ e; ?* f5 F$ K9 \( O( ?2 H - print("Thread start:" + id);
7 i0 |, r j ]4 ^2 l9 P$ E& ? - while (state.running) {
7 f ~, I6 T; p1 I' Q - try {! _. O1 [& |, }3 v
- k += (Date.now() - ti) / 1000 * 0.2;
) ?& `/ w8 G# `; C$ M - ti = Date.now();5 k% U# @6 ^) [6 X T$ _
- if (k > 1.5) {) y+ V1 Q5 g: ?% Q( ?2 Q1 q
- k = 0;3 o, w9 f% d9 A# O6 \. E5 G& r
- }
+ |! N3 r0 Y1 W. _7 R4 C - setComp(g, 1);
, |! N8 v# p9 S; {. ]5 r2 q7 S - da(g);
+ B5 N3 v" y, ^$ b( C4 S - let kk = smooth(1, k);//平滑切换透明度
4 c+ f9 {; W$ t+ k - setComp(g, kk);0 E& r7 x8 A+ v7 w9 s& j
- db(g);. L9 k/ [- `, b! l+ e1 r
- t.upload();
7 i* h4 k) q9 g4 M - ctx.setDebugInfo("rt" ,Date.now() - ti);
( I- L4 w( L: I9 N( f$ U; c/ ` - ctx.setDebugInfo("k", k);
: m f7 O: O% r' o - ctx.setDebugInfo("sm", kk);( A1 d# B. o. c
- rt = Date.now() - ti;. ]! e, ^" Q7 }5 D
- Thread.sleep(ck(rt - 1000 / fps));
7 Z; N2 \4 L- s5 [# }* o' x - ctx.setDebugInfo("error", 0)( C0 ], u- X+ Z* y% {" q
- } catch (e) {
8 ~* C `! H; i. k* z2 y/ u8 V9 w! y - ctx.setDebugInfo("error", e);5 h/ _; H2 L. f& h
- }
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- print("Thread end:" + id);% o/ A: A* R U% R5 F5 W, h
- }
; J6 P! i$ ]( O, J+ u2 m; c" j - let th = new Thread(run, "qiehuan");% P! [1 L; G* ]0 X3 C: w: S* W
- th.start();! u6 g. F3 ` g7 T+ t% {
- }
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- function render(ctx, state, entity) {: K8 c$ a' r3 M! G# @9 H
- state.f.tick();3 _1 L' b4 ^. J& h
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- function dispose(ctx, state, entity) {7 _7 w- r; D5 ~9 V( ~5 f
- print("Dispose");( o2 z' V" W( G5 ^2 L/ H2 E0 B
- state.running = false;
6 f* E% ?- D+ m; F - state.f.close();) _5 H3 M8 u8 V1 U
- }
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- function setComp(g, value) {- `# r# y8 y( v1 p! @- Y7 x' q
- g.setComposite(AlphaComposite.SrcOver.derive(value));
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复制代码 ( x5 t% R8 f9 ?' U
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。& {+ h+ \5 I! j4 H2 z
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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)2 c3 _5 x. d8 j. ?
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