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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 F$ I1 A1 y) R" v1 `3 x- R& c- importPackage (java.lang);. Z8 y I7 c5 e; A' i4 z. }6 m
- importPackage (java.awt);
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; G3 _7 o0 ~9 X6 `! J* Q- include(Resources.id("mtrsteamloco:library/code/face.js"));) P: ?& l3 d6 ~& M1 ?
) q; ]/ W( }1 A/ T4 q' O; L- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 _. T+ m8 i/ x1 ^
- : l6 w) j' e3 Z( b3 k7 j5 w
- function getW(str, font) {
) q* U, b/ B* c& a; {& W - let frc = Resources.getFontRenderContext();. g# R( r2 ?5 d: e& Y) K
- bounds = font.getStringBounds(str, frc);) {! H0 Z* K1 C4 O
- return Math.ceil(bounds.getWidth());! a+ Q( R6 K! _& S% p! f
- }5 a; L8 O7 H, [+ f) f# E
- 4 S/ q( t" m' S+ R+ v2 _
- da = (g) => {//底图绘制
$ m5 X. e1 Q7 ?% c% o c; w - g.setColor(Color.BLACK);
" ]6 Y5 o* L( H& s- ^ - g.fillRect(0, 0, 400, 400);) t5 ]! L* U# I3 W
- }
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- db = (g) => {//上层绘制8 C# c4 c! J. @# A
- g.setColor(Color.WHITE);
& ]3 _, I" Y$ \, s - g.fillRect(0, 0, 400, 400);- s& o5 R+ f: J5 J
- g.setColor(Color.RED);% U* d! H7 E. m& D/ b6 d
- g.setFont(font0);, R$ W6 ^; `3 a A+ ]
- let str = "晴纱是男娘";& j# H1 r- N/ l3 y1 t% o) o
- let ww = 400; `1 G# f) V8 A
- let w = getW(str, font0);7 d6 y0 _0 Y0 v7 d" I$ l7 i
- g.drawString(str, ww / 2 - w / 2, 200);
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V+ B. B" L+ {" O- const mat = new Matrices();
$ p6 B7 Q `! O9 T+ |, H - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {9 w% J/ ~+ G. j; g3 j
- let info = {
7 [; [, B! y- `/ S1 A3 q - ctx: ctx,, X- M. n6 [# K
- isTrain: false,
8 d: [7 o" L! Y$ r, E - matrices: [mat],
5 n/ n, Q$ d9 m* r9 @ - texture: [400, 400],
6 e, X0 c }5 ^0 J - model: {# B* T: b7 E. d& Z! Z" l( }
- renderType: "light",
; B' l- w: p) h% ^0 X) a' d - size: [1, 1],$ b- P/ x. G. @9 Y" ^
- uvSize: [1, 1]
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- }+ C1 s: ]1 q7 [
- let f = new Face(info);
" t( y. y% s/ R4 ]7 v+ v - state.f = f;
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- let t = f.texture;: E6 a- s. T7 C
- let g = t.graphics;
9 b& h7 U6 k9 j% O. C - state.running = true;; E/ R$ R% a* y& l
- let fps = 24;/ D! N2 C3 [' O0 l+ }0 a2 {
- da(g);//绘制底图# |* w7 I. R0 Z$ X- X* X) ^* A8 O
- t.upload();% S, ^. r; A J' N, M, `4 n" k
- let k = 0;
4 W. n& g% G3 t: g4 L* P - let ti = Date.now();1 ?7 n1 W, x$ p( X' s
- let rt = 0;
/ y9 c9 E* I6 g! V - smooth = (k, v) => {// 平滑变化- |5 ], \ }% V7 m5 S* Q
- if (v > k) return k;
8 q; j/ v( i( v9 Z; W! G - if (k < 0) return 0;( c" v$ @5 q; @( A) {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 S! c0 L; H5 s) f. t - }
5 t5 o4 x) [0 Z: b* @+ y& H* X9 I, S - run = () => {// 新线程. R% b: A6 x/ |, a9 J
- let id = Thread.currentThread().getId();
( ^4 U! V4 ~8 N! k9 S" U. H3 _ - print("Thread start:" + id);
) Q& Q3 S% p, [7 R6 ^; B. k - while (state.running) {
3 u q) p1 B0 P' _5 @ - try {
2 s3 z, h3 J0 h& u1 V* }7 Y' @ - k += (Date.now() - ti) / 1000 * 0.2;
W5 n! y7 K' K7 g - ti = Date.now();
! J, \, [2 v' l6 X - if (k > 1.5) {* D& T, N& c0 f U9 Y
- k = 0;' N& ?& Y7 U0 [+ t
- }
* A; _" U. p& ~" N3 O* H - setComp(g, 1);1 h: |2 Y3 B% k/ f: p5 O
- da(g);
4 C: G2 F' J6 n7 Y5 e( k5 a" B - let kk = smooth(1, k);//平滑切换透明度
$ ~9 W! t# {, ]9 b) N* x - setComp(g, kk);
. i J; C6 J' C+ x; V1 K - db(g);
& ?/ o7 V* O7 }4 I1 N7 d2 p5 h. @ - t.upload();
( A1 b$ r X0 F& A - ctx.setDebugInfo("rt" ,Date.now() - ti);9 d5 o9 x4 R2 S& a* s4 M( d7 g6 Y
- ctx.setDebugInfo("k", k);
, M6 `* w) B- r9 Y5 v l - ctx.setDebugInfo("sm", kk);
' y, w2 t, e. a& m - rt = Date.now() - ti;
7 c# I8 E( z5 a$ g7 F) F: ~ - Thread.sleep(ck(rt - 1000 / fps));$ H( a# m* q1 t2 |! k0 @
- ctx.setDebugInfo("error", 0)$ y0 V0 k$ ^% ?' f* r' {" N
- } catch (e) {. P7 @5 s4 t* |2 f# Y* b
- ctx.setDebugInfo("error", e);' l8 A) j' ^( j6 E' e+ i d: Y
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
. o1 l6 o, `0 ^$ N - th.start();
, a; _2 B$ r1 L/ G3 A0 Z - }
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4 l' o% C& @, _ J- w$ \& O. [! m- function render(ctx, state, entity) {: Y+ ]+ Y' P% a% h- U2 z. ?
- state.f.tick();
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- 6 \% Y8 A6 I) S# d) w) N
- function dispose(ctx, state, entity) {
& J- f! Y" p9 v& m0 n3 w, f& [ - print("Dispose");; j% }9 V/ ~# Z% u# H, G
- state.running = false; a4 \+ s9 n ^* T
- state.f.close();4 E ?2 T7 U$ o8 z; n
- }- k8 B& X( H7 N$ F* z3 L8 E
- " Y0 E [; u& v. s& |6 {/ k
- function setComp(g, value) {% Q" d2 Y* I8 M
- g.setComposite(AlphaComposite.SrcOver.derive(value));; T, h$ F1 l& x9 p9 {9 `
- }
复制代码
( m* k" m! a7 x/ a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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. a+ l8 }" E) Y; c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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