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. O6 X) D: [ D1 J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。; e8 m7 T' `4 N$ E9 M* W
- importPackage (java.lang);
: D( h! ^% N; G+ R4 `9 q - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));: a" ?. r5 |% w$ w+ Y
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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6 A& Z c* q; p, d- function getW(str, font) {
2 {1 v. O* w! k0 q0 I8 ] - let frc = Resources.getFontRenderContext();
4 s3 g0 ?- F5 y- |+ R L9 O - bounds = font.getStringBounds(str, frc);: G- g7 a* q w$ F2 m$ r q
- return Math.ceil(bounds.getWidth());
; Y4 \" w+ R$ k! K7 U! r - }
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6 \" N6 J8 o0 ]1 D, [, t; v. N! l- da = (g) => {//底图绘制
- Y4 P$ d& G7 H8 l0 W! p - g.setColor(Color.BLACK);/ ? O! v* @6 D
- g.fillRect(0, 0, 400, 400);
, m; _/ D, c* {- l. \ - }' G$ m5 h1 R& Q9 k3 @& s+ l
- 7 `8 }( Z6 U7 g) V1 ]
- db = (g) => {//上层绘制: q# c" w/ X6 q. F- `
- g.setColor(Color.WHITE);. u2 I8 ?. [# a+ j+ g+ x
- g.fillRect(0, 0, 400, 400);/ t+ g2 ~/ v0 U9 s4 h& o
- g.setColor(Color.RED);
. Z d' z9 e/ h3 ^8 c/ T - g.setFont(font0);6 Y1 ]8 I D1 Y5 n
- let str = "晴纱是男娘";
' s4 L. M( @6 C! u - let ww = 400;. h* C) F4 f/ V- Z5 y0 r
- let w = getW(str, font0); W: J y* f# [+ t
- g.drawString(str, ww / 2 - w / 2, 200);- i6 D" x) c9 t- M. z
- }
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" D2 ]9 F# j" m% ]- n! ?- const mat = new Matrices();
/ s! G4 C( U/ a4 }- m( k - mat.translate(0, 0.5, 0);% d1 q3 Q! m' \: g, P0 m. Y
2 {6 t( |2 n) q- ~8 |( W$ x- function create(ctx, state, entity) {: l" u; X" U/ o. G
- let info = {
9 i7 \# G3 ^ j% m. D - ctx: ctx,
9 w0 ~! Q8 Y& M$ G) Z, M3 D - isTrain: false,
6 U; r3 c0 p- S: j# b; F& N) } - matrices: [mat],
+ O: Y* x2 u4 t4 J1 a* Y - texture: [400, 400],9 T8 @4 Y/ J7 J4 S
- model: { L7 c- n k5 ~+ D4 j" m& w; j
- renderType: "light",9 m7 j) t N( ?
- size: [1, 1],
* [9 ?; Y# Q, J - uvSize: [1, 1]
0 [( X ?: @. R8 t9 s3 q - }
, J' M# A% }- z3 F - }
N9 Y6 C/ c; \8 ^) _; R ? - let f = new Face(info);6 e8 W8 T5 A; \9 G9 [8 r" Y' i W
- state.f = f;% K& e/ ^3 A& w: O: g9 J1 P: N
: ~* m- H& @" M* _. Y, w- let t = f.texture;+ G) d% O" R/ f$ C
- let g = t.graphics;/ A/ f# a3 j: d) I
- state.running = true;
: [% ~- [- O4 s; M - let fps = 24;, a# N; }3 D2 Q5 R8 g- `
- da(g);//绘制底图
. t3 u/ t- B! d - t.upload();1 `" {1 }8 Y b
- let k = 0;
2 T8 C, q5 g- K+ Y5 J/ T# \ - let ti = Date.now();- Z' Q( [4 {7 j; z8 \6 h
- let rt = 0;
6 x; p% w$ `1 }4 o5 C9 [) \5 \- p - smooth = (k, v) => {// 平滑变化5 }* k+ q1 n( n w9 {9 D
- if (v > k) return k;
6 N; O: V+ x: d. G$ M) X - if (k < 0) return 0;
- e, s) G: @0 s# f& e$ ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 U; \$ b7 s. ]& Z
- }! e7 k% L3 @" \0 d9 g
- run = () => {// 新线程
2 {: s" P) X) U; X - let id = Thread.currentThread().getId();
: {& H' h, x/ s - print("Thread start:" + id);$ t0 j1 k( m! t
- while (state.running) {( B0 `, ]6 s V8 g9 M3 l
- try {3 ^" L) P) J+ k5 M; Z3 V$ k) r n
- k += (Date.now() - ti) / 1000 * 0.2;7 p- P" B! I3 M3 \
- ti = Date.now();: p! @9 L2 V3 t9 G
- if (k > 1.5) {. L% C. n$ ~4 ?
- k = 0;
% t" C+ ^+ J+ b' z N; X8 a7 f - }
* Q% E% j( ]4 r) w" n7 z- {5 |" Z: ^ - setComp(g, 1);) e2 a5 T# U$ c6 s4 z6 ?
- da(g);& S+ j2 a' {* v) p. h
- let kk = smooth(1, k);//平滑切换透明度8 N% o. S4 U; }! x. i3 K
- setComp(g, kk);6 }- Z7 f- [; j' M" c+ U! }/ q, {: ^
- db(g);' e: N {+ B N! H3 {; M
- t.upload();
$ M( ]/ d& s& ]. r; t% h - ctx.setDebugInfo("rt" ,Date.now() - ti);( C4 D/ @$ [/ C- V& r: Z
- ctx.setDebugInfo("k", k);# m7 x1 V" i7 u( b7 _
- ctx.setDebugInfo("sm", kk);
; i# d: G" D6 E - rt = Date.now() - ti;" k; _0 }* Y: J- I( ?" ]" l( y1 z
- Thread.sleep(ck(rt - 1000 / fps));
9 b, [- c4 k+ l$ H. [% k7 l6 O - ctx.setDebugInfo("error", 0)
# x( E/ O A" U6 d# }' N/ I - } catch (e) {
( Q$ c( s0 [. r& r7 ?8 Q - ctx.setDebugInfo("error", e);
* M+ h0 B: U7 r% Y4 ~2 E7 V - }* U, L( y q- p, E# e
- }
. h* `# l) ?+ M F - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");4 j$ h5 j! [! h
- th.start();
, g2 \% A4 }: w: x$ @ D0 s - }
7 |( R: Y4 i. Q6 l9 y - # G- Y+ y- l" u5 f. n( p5 g" r+ P
- function render(ctx, state, entity) {
0 T( k& z) x5 U0 e$ B& }# S - state.f.tick();
# j3 I% v8 t( b, u7 D - }: v. M/ V* S! j' V9 r1 v3 C
/ C% L+ F- E: h: ~# u9 z, o# y1 q- function dispose(ctx, state, entity) {
' Q: r! B3 ?- J2 r O - print("Dispose");
4 F- u K% t/ q6 X9 S - state.running = false;
. ~7 L3 ]- ]# M" F* S2 y; V# d% N' Q - state.f.close();0 L' y5 u) I/ y% `
- }
6 }4 F9 r; [. Y: g6 h
! b+ t& V( u, }: O4 |- function setComp(g, value) {
- r# P: G1 R: I- p3 y2 [& ] - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 i# E: J3 }! h2 A3 t# H. D2 k - }
复制代码 3 a8 L" l# X: ]" I5 h1 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。7 }) q9 [) u" m, r9 q
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7 c1 \5 C. N( N: ?- @. E* \, n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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