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; h+ ` t: X7 L2 _' f) H+ D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。
% v2 I& n: P6 H5 ]0 I ]- importPackage (java.lang);
r, E# K" T m; d2 k - importPackage (java.awt);
* p% ^1 p9 X0 J. ~ - , H+ q6 d4 R4 C. s- r$ v
- include(Resources.id("mtrsteamloco:library/code/face.js"));/ z& _$ }- O( [+ D% j$ i
5 C4 P* B) k0 g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ l- U0 {; v; y, _7 F: D& B
- 8 m. g/ @2 a: W8 j \; X# f- j
- function getW(str, font) {
6 Z$ A4 o2 K: ` - let frc = Resources.getFontRenderContext();9 I# W2 t+ |: U9 {$ A
- bounds = font.getStringBounds(str, frc);
* M: K! y5 i l! r3 @' t - return Math.ceil(bounds.getWidth());
% O$ n* t* ?6 m$ D& W - }
~0 }. g2 T I. w% y/ P( C
3 V1 k0 U, s1 l& O- da = (g) => {//底图绘制
* w6 P3 i* n8 t b* P0 Q. m - g.setColor(Color.BLACK);+ B2 G" g* A$ D; y; y
- g.fillRect(0, 0, 400, 400);
' `4 m2 |! ?1 s - }3 \, O; k2 z; p# p) G" B1 g: `
- . `$ z# g3 [& S% I/ k9 A0 [% o. `
- db = (g) => {//上层绘制0 b" D$ j. i1 d" R+ l, `
- g.setColor(Color.WHITE);0 l3 q" D4 ?. p0 L9 s/ v' d
- g.fillRect(0, 0, 400, 400);2 P( D0 [. D- n$ d) F0 y+ n
- g.setColor(Color.RED);
9 ^: A4 [, {9 Z+ ], [' E4 L# N - g.setFont(font0);
( Q2 C+ _) E$ r2 M& n - let str = "晴纱是男娘";
( p. f# m F& M+ I) n - let ww = 400;2 N! C% _, S1 a+ x
- let w = getW(str, font0);
! c) k* r+ T3 b m" z+ s - g.drawString(str, ww / 2 - w / 2, 200);% g9 d. N7 [8 l$ ^9 ?- H* e
- }6 K$ I' S1 ]0 y
- 4 J: V& g7 [( n; S! @
- const mat = new Matrices();
4 _! C9 e' X# b* H, W+ M0 V- L$ I. V - mat.translate(0, 0.5, 0);5 y- S7 z9 t+ ?3 C& V, W% \
- N3 f' |) C7 `. D# H7 i5 ]
- function create(ctx, state, entity) {) W3 C7 H: ?; {: N! B1 q
- let info = {
2 _$ m) X2 N* P& M3 e; P8 P - ctx: ctx,
* A* D1 w$ Q+ `1 o: h0 n4 g - isTrain: false,
# T* Y: e+ ?4 M - matrices: [mat],
# ]! X% f3 m; t9 M. V - texture: [400, 400],: n O, c5 c# Y) R$ d
- model: {
9 Z5 d& g0 G8 R# @4 O - renderType: "light",. k% i1 m0 P! T+ b3 M) b
- size: [1, 1],( `$ `5 d2 I* _% v5 n
- uvSize: [1, 1]
: N! {: }; B6 {" r0 ~; ? - }& n6 X D, e9 s+ Q
- }2 W; u; h7 \1 n
- let f = new Face(info);
3 R* Y; q3 z" }% y; K1 _0 z8 r - state.f = f;' Y/ Q% @# g7 J+ K3 F9 c: d; e
- : A1 a3 s4 w7 v' N
- let t = f.texture;8 O! ~+ ^, y6 s v
- let g = t.graphics;
/ L# q# \6 X5 U6 s: A - state.running = true;
) C# ?6 b& y( D) J1 f - let fps = 24;
[% n6 x) S. }: k) E5 b/ s9 k- d - da(g);//绘制底图
/ U0 G# N+ [( U" g% ~ - t.upload();; T7 m" a! R5 q$ [9 i6 T
- let k = 0;
" u7 c# w0 U+ |2 O+ I# Z) A0 d1 x - let ti = Date.now();$ ?# q1 [; q5 A/ P. O
- let rt = 0;4 ?# @! b g0 O$ j7 h1 a. v
- smooth = (k, v) => {// 平滑变化
! G8 L( D* @. T1 I. w2 i' K - if (v > k) return k;
9 ~" [- P* F7 `) ~5 C% V6 t' M - if (k < 0) return 0;
7 S9 H2 E! i. F8 L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* Q( F( ?# Y2 _ - }( O! }: b, H! \1 @% I
- run = () => {// 新线程) V- o3 t" r/ N
- let id = Thread.currentThread().getId();0 ~& T Q4 m( h
- print("Thread start:" + id);
5 S& \$ q' S L6 j5 O; s! ^ - while (state.running) {
; v# M5 M. q9 _( q - try {- F" U8 ~7 s; o0 F3 ~; t
- k += (Date.now() - ti) / 1000 * 0.2;. ~4 a" V9 a$ T9 L4 e
- ti = Date.now();
}( I8 \* Y0 V, z6 | - if (k > 1.5) {4 \5 A0 c2 r1 t! x. ]5 r9 \! p
- k = 0;
; G. ?( Z" z8 n: o - }. T3 P9 \( M5 X$ @
- setComp(g, 1);/ [& l9 V2 L9 D. b8 N7 k: i) j1 v. v: K
- da(g);. Y( r. x: C6 p
- let kk = smooth(1, k);//平滑切换透明度+ @8 [2 K* q4 M( [9 j+ j2 J
- setComp(g, kk);3 |5 Y; T' e9 M
- db(g);! o/ f! h7 @8 @3 l* Y
- t.upload();
" d: x6 N5 C% ?3 |6 \4 L9 L5 B+ Y - ctx.setDebugInfo("rt" ,Date.now() - ti);0 e/ J" {$ x/ q. n
- ctx.setDebugInfo("k", k);
% T+ m7 u5 k0 r - ctx.setDebugInfo("sm", kk);
% D% \1 B4 D5 I4 W* X6 V/ Q' `* `; H - rt = Date.now() - ti;
% e3 k6 ^( d8 i* ] - Thread.sleep(ck(rt - 1000 / fps));
- Z: w# k) ^' y, Z# O7 M' ~ - ctx.setDebugInfo("error", 0)
, N2 f" ]% e4 x. w3 Z - } catch (e) {7 ]5 v' c. _% e- i4 K, {
- ctx.setDebugInfo("error", e);* M) S4 d3 ^7 j/ d
- }
9 ?* ]* d( J& m' i: I. \; j6 j - }& \ {) }$ ?1 X ~& M
- print("Thread end:" + id);
3 J. k; \& x& y4 h# v - }
' Y5 C+ F7 K4 D) G - let th = new Thread(run, "qiehuan");* j) {2 G R, @( N- t0 [/ g
- th.start();7 C' Y8 O S" u/ J
- }- P6 _% }4 w( z
- $ m- d( t2 R4 o' U
- function render(ctx, state, entity) {) m& H/ G' _+ C9 G* X
- state.f.tick();
% J- E3 G4 f0 p4 i - }' W2 ?: U: [/ v7 u% y& H" t. |
# D3 ^! a: _# D$ K1 D& m- function dispose(ctx, state, entity) {
2 C4 w6 d7 {3 L6 n. {1 D - print("Dispose");
8 c+ V: _0 B3 k$ ]6 Z y$ y - state.running = false;
% a! G+ `6 n8 i - state.f.close();5 R0 t) ~. b. Z @
- }8 T! v% x8 _" _' g/ R+ l4 I$ t+ `
- - c8 j h, y% H% c8 v" a! X
- function setComp(g, value) {$ r7 g+ [0 ~. [8 r: d
- g.setComposite(AlphaComposite.SrcOver.derive(value));( w- V* F5 P( ^
- }
复制代码
. U4 _) h7 i; j3 s: ^% h3 j2 }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。
3 B' ?( f: [* |4 z9 i" w$ M
, o U+ h3 [3 v& Z* K' D9 R' g( F
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- j% e5 w1 H# B
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