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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。2 |7 c, ~ G8 c4 R8 h
- importPackage (java.lang);1 q: {! L2 {. Q% M; L
- importPackage (java.awt);
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! x8 I5 P& c; i1 {: K: Y- include(Resources.id("mtrsteamloco:library/code/face.js"));8 |8 h- c: z0 i- D: D
3 O; } M9 c* R9 J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ j# Y& Z6 t! |* I1 j
, S& {; v3 V% i6 @& K" f- function getW(str, font) {
$ Z F$ d2 _% i7 Z( s1 X - let frc = Resources.getFontRenderContext();$ y5 K9 r- e2 }1 e
- bounds = font.getStringBounds(str, frc);& N; S9 s' r& X% t: j+ k
- return Math.ceil(bounds.getWidth());
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- , V! K; Q/ K6 E/ T
- da = (g) => {//底图绘制
* R0 s' y( x; e: X8 |& B - g.setColor(Color.BLACK);
7 Q5 c) C* y, q5 p - g.fillRect(0, 0, 400, 400);
% L7 W/ A2 y9 O% i" e; A# o% B8 C - }
# o+ g9 G( F1 m- ~ - 1 m3 L! u" [0 n1 ^; x6 `" D
- db = (g) => {//上层绘制
8 q7 y9 G% g: t1 h: L& x" r& k - g.setColor(Color.WHITE);
0 U0 ^0 j% b& E: _ - g.fillRect(0, 0, 400, 400);$ J0 C* Z1 m- ^
- g.setColor(Color.RED);/ {$ B5 R3 d4 M% O
- g.setFont(font0);$ S7 }7 N/ P5 g0 b# U$ O! g3 F0 G
- let str = "晴纱是男娘";
, @ ^* v. \, }( J* [& B; K - let ww = 400;
' a) ^4 v* Y5 {) E( B/ z( f% V. c. [ - let w = getW(str, font0);
& K6 }% y" U! U# A; y - g.drawString(str, ww / 2 - w / 2, 200);
/ [% e4 ` w( j$ g - }
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& ]' _2 \- D8 M1 N+ g- const mat = new Matrices();
, C( c H, t6 V* W - mat.translate(0, 0.5, 0);2 G( s5 {% ~. ~; z
- 8 F% [9 |( p/ P D" }7 r3 D
- function create(ctx, state, entity) {6 g7 V. Y9 u0 W: Q! |' \" E
- let info = {0 `( i" Y3 _+ k7 }
- ctx: ctx,
- ^) i- U! [9 N - isTrain: false,* _3 I& d2 d2 o& Z- [6 ]
- matrices: [mat],
8 X9 }! S. r' _8 Q - texture: [400, 400],
2 c2 u1 Z8 J- C - model: {/ e7 V3 }& n( k) `
- renderType: "light",
( w# z" h! O3 N - size: [1, 1],
) |& p: H, X* J) I - uvSize: [1, 1] C( _* M4 x. ]$ s. C6 a1 H
- }" @9 N# C# @7 }, F# b5 B$ ^" F
- }. p, t+ Y, u2 i
- let f = new Face(info);
9 Z# ^3 n" C" `& _( J1 C0 k - state.f = f;) F s' p+ x* a: O C
Q$ ]# c& [# T+ x3 _) s- let t = f.texture;
& y1 `* F) D5 l* R& u$ l - let g = t.graphics;
6 A4 X8 u* o" k9 I) T - state.running = true;
9 `6 O' o2 m( M" R - let fps = 24;; X; b) l& G+ D
- da(g);//绘制底图
5 c/ L$ _ z j5 T, H - t.upload();
% z S3 x7 E: O, Q- A0 ?+ F - let k = 0;
, V* c, i7 V7 C - let ti = Date.now();3 x% U/ }: O" b3 J4 G4 o9 q# s
- let rt = 0;
, W- j# r- ^, g# ]: ~ - smooth = (k, v) => {// 平滑变化
/ O& e, ]! Z; h) }$ z - if (v > k) return k;
8 ]2 N# c' p! R - if (k < 0) return 0;( Z3 x9 q8 z& w( d
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% y7 Y+ g# a) `1 ^) G4 Q
- }
4 g$ h0 Q( x& L; @3 e - run = () => {// 新线程
4 ? b& a! S! z: m) w- W - let id = Thread.currentThread().getId(); j# B2 r! p2 c, _; K* }2 l
- print("Thread start:" + id);
# O6 r r4 \& q: L8 z) j/ I - while (state.running) {
" i1 y1 R6 l: K+ p9 s - try {. E# D. @' ]2 R) w
- k += (Date.now() - ti) / 1000 * 0.2;
% d6 M# m2 ]. I7 c& U% s - ti = Date.now();* x: f; k5 X; k: f9 }
- if (k > 1.5) {$ f* a- t5 U% A6 N0 q- o8 H: T
- k = 0;
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- setComp(g, 1);
w, q5 d, k) Y9 F7 o2 o - da(g);
$ w& E& p9 d+ S - let kk = smooth(1, k);//平滑切换透明度, p A7 Q9 i8 C( ?; C% w
- setComp(g, kk);
5 p' D! y. b: l+ f$ K Z - db(g);
- b* z; b( O7 Q$ j# U7 X" T! X. m" O - t.upload();
J) C4 ~0 n$ h6 G/ k x( Y; V; _ - ctx.setDebugInfo("rt" ,Date.now() - ti);
; ~' b9 s" t+ X: W9 c) Z3 u( g- c - ctx.setDebugInfo("k", k);' W3 D1 j) R- E7 A6 o+ K
- ctx.setDebugInfo("sm", kk);
: W8 N( W6 b- l P, J# I - rt = Date.now() - ti;$ I6 }5 e" ~: _. D- W: f0 R
- Thread.sleep(ck(rt - 1000 / fps));
) u0 U/ V9 b7 ^ _8 f6 J - ctx.setDebugInfo("error", 0)
- A& {8 @9 D4 [4 d9 d, V - } catch (e) {# U% c3 Y4 b5 x7 G5 I
- ctx.setDebugInfo("error", e);
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- }% W9 k+ l4 ~# }+ q) \! D
- print("Thread end:" + id);7 t4 T1 J! G: T8 c
- }+ _" \0 ?( g! I l
- let th = new Thread(run, "qiehuan");: |) M7 D6 f+ ]# b9 D3 ^1 x. j
- th.start();
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- ! g2 c/ T1 m7 L0 C/ F9 {
- function render(ctx, state, entity) {
, O0 r; u# f6 p5 H. ^2 C - state.f.tick();
, [; ?9 f% a( w3 v! |2 k - }
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9 t; m1 { {. c2 f; R! F- function dispose(ctx, state, entity) {
2 A: m P7 S9 G3 H7 p - print("Dispose");9 {* c# P* j) f$ j
- state.running = false;1 }" F; {3 j% S% Z4 S/ }, H( D9 F1 j
- state.f.close();8 m+ }6 H/ D6 l) _0 G0 s4 Y
- }
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5 x! n, z9 \0 N6 H7 Y! t- function setComp(g, value) {
0 l4 U" }0 t9 y- ], P- r' ~ - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 H) G. u* I, b" V& s+ E! X9 @: c - }
复制代码 3 I7 _" R0 h$ t: ?
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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/ `/ z! P# N4 q' @顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)/ f# a0 k( w- P1 h8 \/ h
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