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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。
9 q1 ?( s j: p/ O- importPackage (java.lang);8 C6 }* z1 ~9 X4 _
- importPackage (java.awt);. r0 q. D- x1 l
* J) I8 D, B6 a" `$ a- include(Resources.id("mtrsteamloco:library/code/face.js"));; q6 t1 b; s8 ]$ [
- ! L, p8 P' @. T3 Y$ K
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
$ B! f0 z* r( D* x0 y! }) F - 2 z u% F: t K" h8 b, v' }
- function getW(str, font) {8 F: A+ A% K( f$ \; Y' m$ c' [
- let frc = Resources.getFontRenderContext();
& X% z( O0 [! L- b7 _. x* b7 } - bounds = font.getStringBounds(str, frc);
* P0 | s" N; `, Y - return Math.ceil(bounds.getWidth());3 x/ e6 f l' k6 l
- }0 D) E# f7 j5 r' ?
- 2 g3 z! u& b( |. I, }
- da = (g) => {//底图绘制% l }2 @4 }! l ]/ c, a
- g.setColor(Color.BLACK);2 J$ c% Z: R& Q+ f2 d% `5 _
- g.fillRect(0, 0, 400, 400);8 L @) [* q: Y2 r9 B8 l5 ?
- }
* C8 ^7 @$ [# n- y/ e
0 S7 G, x% ^( P7 U+ o& M n- db = (g) => {//上层绘制
u( C" i& A3 F1 Q$ A - g.setColor(Color.WHITE);8 D5 S7 `5 \& [: V# x& R/ V Y
- g.fillRect(0, 0, 400, 400);
0 M2 |$ i* \+ K1 f4 U# M, Y( V - g.setColor(Color.RED);
& u: j+ Y- p. X0 ~* F1 O" F - g.setFont(font0);0 z/ U+ ~+ o0 F5 e; {+ ~4 v/ f& k
- let str = "晴纱是男娘";/ B, l. O' t0 L z$ |: n
- let ww = 400;. Z9 @# w, V, M6 |% D
- let w = getW(str, font0);
. L" q+ d* I e4 \3 s, \ - g.drawString(str, ww / 2 - w / 2, 200);
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- : N' o: |1 z) Q
- const mat = new Matrices();* F) {" O( e$ x
- mat.translate(0, 0.5, 0);
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4 L' Z& V: X/ \0 |- function create(ctx, state, entity) {2 ]+ ?* Q W; z, p; f: c O
- let info = { M7 M2 I, p" N" f5 j1 [
- ctx: ctx,
+ k2 ?2 T- Z0 T- l, f& S, h: i - isTrain: false,
; I9 i V9 g8 i# v - matrices: [mat],
0 L# v3 ~8 D- z - texture: [400, 400],
6 N" [( p% ^4 j+ M- ^ - model: {
5 t1 P5 \$ G! w$ | - renderType: "light",
2 K( c6 I) b% l7 y - size: [1, 1],
: t1 R* F" G& m6 N" i# D - uvSize: [1, 1]! N% p' x' X/ c0 b
- }
5 F H8 O0 G% Y$ w h; ? - }5 O, q" T6 L' m! }7 I: C
- let f = new Face(info);
h W1 G% A: y( v; _ ~ - state.f = f;
0 ~6 L2 p; d% m9 |# w
. n* I' ^+ }# u, L# r- let t = f.texture;
' E; L5 ?* J+ E, X( ?" f/ } - let g = t.graphics;
$ U/ V: |/ l; z6 J; ^1 Q# h& f2 I - state.running = true;. k5 m9 ~* X3 i( H' O+ X
- let fps = 24;
: {2 A' @' h) R8 u. d - da(g);//绘制底图, }! J! a4 a4 m2 z0 c% s
- t.upload();9 f$ h( W- U$ D* @' S& ]
- let k = 0;
8 H4 ?' m" U9 G# u - let ti = Date.now();
3 o9 H$ @. @5 S8 M - let rt = 0;
2 P; }) m% |; a7 F - smooth = (k, v) => {// 平滑变化
, A# l3 e. w1 y+ F3 f - if (v > k) return k;
. w9 m& j- |$ l. n - if (k < 0) return 0;; V+ q0 L" I/ F
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
9 n" q, H- q' W - }& Y; f P, G+ Y1 i
- run = () => {// 新线程* w; ]" o; f# M3 v! g" f5 H
- let id = Thread.currentThread().getId();! a0 i9 V$ y7 ^# O7 ~7 q: h
- print("Thread start:" + id);- B4 U* u# |! P
- while (state.running) {
3 p& v; n2 K/ G4 d% ` - try {. _% {; z4 n# h9 m, a" c4 J/ v
- k += (Date.now() - ti) / 1000 * 0.2;
! \+ L# t7 _' f9 c, h - ti = Date.now();
8 l% e: [0 C8 x9 i" V* w - if (k > 1.5) {
# Q7 c0 _+ n! u+ y( `* f" M - k = 0;
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- setComp(g, 1);0 T2 l" Y7 m5 E7 _# Q) I
- da(g);$ `7 `/ A1 O8 q! c- v
- let kk = smooth(1, k);//平滑切换透明度+ S2 m& R6 f+ {, H3 n: h
- setComp(g, kk);
U& T! Y0 k( l2 ~, d' P, H - db(g);
: A; O6 X, u0 z. T' X - t.upload();
5 V$ r# f! d. u: q2 P' J - ctx.setDebugInfo("rt" ,Date.now() - ti);7 c5 N, z0 R }( T" n3 h
- ctx.setDebugInfo("k", k);
4 Z: [5 \1 V. P. _- c! Z6 C - ctx.setDebugInfo("sm", kk);
& [/ h8 \+ v4 t. q" ? - rt = Date.now() - ti;: j* ]: V2 Q7 m
- Thread.sleep(ck(rt - 1000 / fps));6 o' P1 Y8 S+ \: E
- ctx.setDebugInfo("error", 0)
1 u' n8 u/ t$ o; f/ }& s5 D - } catch (e) {7 ^9 h/ N8 H! `
- ctx.setDebugInfo("error", e);7 z4 p B [- \& F4 d
- }
( j' _8 F- s( R - }$ U L2 L# n" f
- print("Thread end:" + id);
* m; K- u% F" ?( S3 S - }
4 N& B6 f$ l8 x$ \7 A/ d' C - let th = new Thread(run, "qiehuan");
! \4 p6 D) ?; b# P - th.start(); b3 H9 }# J' x0 B- j
- }
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' u; V2 Q' u( T- u* a" d$ g& J- function render(ctx, state, entity) {; V! R* q, V. h) `9 Y7 }5 Y3 N
- state.f.tick();, U" Y* @ u6 B
- }
! e/ j2 h( }9 E1 \
0 M* `: u/ S. X. o- function dispose(ctx, state, entity) {
; E; _8 ^ i% u8 O - print("Dispose");% I. R$ Z( F' U* s- ?: X9 W
- state.running = false;4 P3 ? `5 f, Y) \3 a, S4 E
- state.f.close();
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# _/ {& w/ a2 l* n/ {- function setComp(g, value) {
& d* s0 q9 i5 V- ]( ] - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 ^, i2 T+ T0 H - }
复制代码
; @! z1 Z" Y+ {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 |# f# F1 M ?: p4 |: ]! K
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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)+ O" ?9 o9 \0 _( i) f0 T4 x6 |: ^
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