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9 Q1 o- o% F t; f3 S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。1 X9 L e2 F5 A% L! ~" ?9 E
- importPackage (java.lang);9 n- X( }4 G7 C
- importPackage (java.awt);
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9 U" ^) H7 K- _" i. j H1 S- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 q# ?2 _5 @8 @. G7 A0 Q: w- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 E8 a! U9 W+ k3 q; [% N
- 4 M" W6 u- F: V/ x
- function getW(str, font) {! h% X, F1 w' u& M' J/ J
- let frc = Resources.getFontRenderContext();, l! w" k8 _# M5 d$ S3 D4 ^' [
- bounds = font.getStringBounds(str, frc);
6 P. e+ p6 C% l - return Math.ceil(bounds.getWidth());
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# p' A. T: S# P: n0 m5 V4 { x# o6 R; w- da = (g) => {//底图绘制
Y1 t& @% Y5 C( ] - g.setColor(Color.BLACK);4 W4 ^' I: L4 g) I- A* r! l4 x) O
- g.fillRect(0, 0, 400, 400);
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- db = (g) => {//上层绘制% g4 Y" h' F; V* ^/ f- T
- g.setColor(Color.WHITE);
3 j, u0 S0 i: Q - g.fillRect(0, 0, 400, 400);
! V- o0 U$ |7 z% Q: q0 z1 K% m( ], E - g.setColor(Color.RED);" Z2 x. F3 H+ T" f6 T9 R
- g.setFont(font0);$ e5 d5 @' e- n& I0 S, E
- let str = "晴纱是男娘";8 `8 k, j" Q$ }6 P9 y: [5 e0 s
- let ww = 400;! X5 h: @6 h! w l4 s
- let w = getW(str, font0);; a% @& A: ^6 D$ ~4 Y0 k6 e' G
- g.drawString(str, ww / 2 - w / 2, 200);
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0 P6 e2 Q$ _) t, M- const mat = new Matrices();/ Y* W% h, P8 v
- mat.translate(0, 0.5, 0);
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]8 i$ V/ D/ H- function create(ctx, state, entity) {
$ b6 F# S3 ^! Y+ F - let info = { E$ H& }2 @- B% Y8 |% o" z) I
- ctx: ctx,
0 }5 e: C) ]+ u E" U - isTrain: false,
6 n3 \( x1 U+ R$ V - matrices: [mat],8 }$ j: K" C5 H X, |
- texture: [400, 400],
- F0 s: b9 d1 C2 @! j# V. Y - model: {8 C1 E$ L* W( s5 U* }/ ?/ r& A/ w8 r
- renderType: "light",) ^' q1 u( Z% `2 j7 z- E5 l3 ^* I
- size: [1, 1],
, a T* J& h4 Z$ ~0 t# q1 a2 `, p- H - uvSize: [1, 1]
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- let f = new Face(info);( x" A9 z; a* `9 d5 q
- state.f = f;, Q6 H. C+ u# ?3 Z3 Y
- ! h' e, p5 s% S6 E. F
- let t = f.texture;
5 f L) m, |2 [7 V" |6 E - let g = t.graphics;
% _7 J6 M& k2 [7 E7 ? - state.running = true;5 E2 U+ t6 L9 K1 C6 v3 x
- let fps = 24;' ^2 K' S E3 t+ y J* O+ N( L
- da(g);//绘制底图+ N( S& i' ^7 J% P8 D8 h
- t.upload();( a6 V2 D) Q) u4 z) k
- let k = 0;! n! U' a! ?! z6 ^
- let ti = Date.now();
$ W% T8 k; d9 v: X* x - let rt = 0;
( R% T k4 O2 Z& h9 e2 f$ A - smooth = (k, v) => {// 平滑变化
2 I# b0 e" m% E3 } - if (v > k) return k;& D; ~3 h, Y9 I( j
- if (k < 0) return 0;$ I7 v- r! H/ S0 c5 z' \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# K g2 J2 y. O& R/ T3 s: d
- }9 u) s9 r1 Q% q2 b' P# w1 G* e
- run = () => {// 新线程
; E( j3 m9 f. O& ]% L - let id = Thread.currentThread().getId();" `" H3 q! R; Z: }7 q* j0 }! z; v2 H' Q
- print("Thread start:" + id);
' @+ ~# W G; S% g0 e2 E, T; I - while (state.running) {
( [0 ]5 |7 c% c5 G, d - try { a' ~" T7 v7 r5 G
- k += (Date.now() - ti) / 1000 * 0.2;( F" o% p6 y, r* t' Y" T4 V0 ~( Q
- ti = Date.now();( V2 A( a# B J3 x
- if (k > 1.5) {
1 f& v) S# W. A; o9 a2 x) ~+ S - k = 0;* D: b! H* R o, i# S: A9 [4 t
- }' h. f1 z& X, D5 i! A# v
- setComp(g, 1);& s+ B: }. |8 w9 e1 P! Z$ C
- da(g);
L5 g5 S+ v1 a9 l - let kk = smooth(1, k);//平滑切换透明度
3 m/ O5 v& ~+ Z" r/ k/ y* a - setComp(g, kk);! j, i& x9 G+ h; ?2 d0 @5 F
- db(g);
, f# y% P& r" x - t.upload();4 O9 o0 N; D" {8 i9 f q
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 X4 T: w; o E - ctx.setDebugInfo("k", k);. M7 M2 |' H* R7 B7 n+ |
- ctx.setDebugInfo("sm", kk);1 a. B% l( J, k" }8 O; y% v& {
- rt = Date.now() - ti;# k: G3 a- v4 \ O7 x$ }& E4 [- s
- Thread.sleep(ck(rt - 1000 / fps));: m; A, p" {' z8 z
- ctx.setDebugInfo("error", 0)# ?8 L9 b. f1 ~' |) ~! T( U- a1 X
- } catch (e) {
. Y9 t4 Q" N. g" m - ctx.setDebugInfo("error", e);
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0 q3 ?- u% L3 B9 m \ - print("Thread end:" + id);( Y; }$ _: U% U- N/ x
- }$ l5 u3 k8 R3 f8 s `
- let th = new Thread(run, "qiehuan"); n0 f3 R" o" ~" d
- th.start();/ ]& z6 T( H$ B+ W
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- 7 _. j* i/ U H
- function render(ctx, state, entity) {1 C, F4 Q1 Y" j6 V
- state.f.tick();
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- - D: U6 C+ H, i0 {
- function dispose(ctx, state, entity) {
1 Z! K; o9 t: Q7 y) y - print("Dispose");7 h7 b3 b8 [" m, f# X; h3 U
- state.running = false;
" E! Y2 J1 I* W - state.f.close();
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- 3 m& O( x, g1 r' j
- function setComp(g, value) {
5 k0 z' N; w1 Z, a3 P/ Y - g.setComposite(AlphaComposite.SrcOver.derive(value)); a! ~4 u U1 K" u! U0 ~" ^8 y5 c
- }
复制代码 ! F! I+ I' s( p1 Q. ~
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。. |( \; U. t. H
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) w+ J+ C; l0 |" }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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