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- T* k; I1 s! k4 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。
' w! `0 j u. A- importPackage (java.lang);
- K8 X2 x. w. [$ q - importPackage (java.awt);& Q6 D6 B! k- J
- # \7 _$ p; g, ]; X# u( J
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# b* Q$ I, a% b. [
- / H7 [; ]( y; B( w. j3 y0 C
- function getW(str, font) {6 Y! T2 m! S5 { R2 G" o4 V4 R+ n
- let frc = Resources.getFontRenderContext();
* N i- a6 t9 u5 B5 }' j - bounds = font.getStringBounds(str, frc);' G7 N! D! ]) Q# Q, c& f
- return Math.ceil(bounds.getWidth());
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) q, {9 H" s4 ^# W% s; s' c- da = (g) => {//底图绘制
4 o# M5 m8 Z/ Y - g.setColor(Color.BLACK); D* z) Q/ o2 P. Q! D* v
- g.fillRect(0, 0, 400, 400);
+ K5 X0 d! o: x* \ - }
: |0 W' w# Y( {1 z1 ^. t - - E' N! Z3 c3 ?9 s8 K. M
- db = (g) => {//上层绘制
4 @( b3 }6 B W4 [! ?! | - g.setColor(Color.WHITE);. l, X. \2 K. V$ Q9 _; f
- g.fillRect(0, 0, 400, 400);5 j( f1 B% Z2 l; l; }/ u
- g.setColor(Color.RED);& F! _5 W3 h# H j
- g.setFont(font0);
4 e ^" X+ H# _; g4 I# [* m - let str = "晴纱是男娘";
0 _3 _' L+ @3 C* S: r - let ww = 400;
! E( K8 \* h9 ?9 D, h - let w = getW(str, font0);' U: x a" V, \. c8 R( c4 ~: ~
- g.drawString(str, ww / 2 - w / 2, 200);
" M4 N# p- o5 i8 W' e: }! ] - }
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- b3 s, T& X: q4 Z9 D! w$ g0 G- const mat = new Matrices();
4 q. A+ p, h) W5 s - mat.translate(0, 0.5, 0);/ y# B( Y% G* @
/ I& e; M: }( V! c0 N- function create(ctx, state, entity) {* u" B- `3 s- ]! M2 Q0 R8 e
- let info = {/ D; I7 v: Y+ X% O. S2 O2 i: f
- ctx: ctx,- C) _/ w, p; b
- isTrain: false,
- T& i% [( d- {! U9 \# [7 [: b - matrices: [mat],) R0 t2 [, l, S: ]' C7 T. E# p. e
- texture: [400, 400],$ G9 i X) X/ T! }' M; H) ]
- model: {
- N, E1 Z* I6 J! L) x9 ^ - renderType: "light",6 x! B! b" F4 C n* Q
- size: [1, 1],
' _; o5 D6 f. L( @# R' v/ m7 M' y+ I - uvSize: [1, 1], k4 u" W9 T3 X( R% F
- }) W7 L8 m1 R9 y; u1 {
- }
8 U8 q2 v+ z( P* P7 K% ^ - let f = new Face(info);! H5 T. o5 D0 I6 \% j u
- state.f = f;# o. m, u A! I/ D4 p! X4 x; A
% y9 D$ k6 f' Y- let t = f.texture;. c! P" O! Y0 h/ h4 F
- let g = t.graphics;
$ [3 ^+ S4 R, m - state.running = true;
1 B9 I4 ]2 _9 k \( g: q - let fps = 24;# z" p6 Q$ S. S9 k3 {4 R" ?* `! V
- da(g);//绘制底图' n w& g4 l- z- q' ]
- t.upload();, _2 k" l/ |8 y% Q* u
- let k = 0;+ q! Y. [: B0 X0 _5 G
- let ti = Date.now();. U( ^* P# F. Y |
- let rt = 0;- |' l) X9 _: \0 m7 V
- smooth = (k, v) => {// 平滑变化
% e3 r8 e) K w1 z0 M; D0 K/ ~/ q - if (v > k) return k;% u/ V2 Y1 ^4 w6 T' n0 p: S. c# V' t
- if (k < 0) return 0;
( x0 R) @) l( | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ Q6 ^' x, [+ z+ P: \) p& Y
- }# W1 @8 s7 D3 B- K& e5 C4 n& Y& _
- run = () => {// 新线程. d+ R ^8 O4 V) `" \; P
- let id = Thread.currentThread().getId();
- i/ C& J7 p+ _( T+ I7 A% `0 ~) ^ - print("Thread start:" + id);
; N% c; k# A, g; ?) P$ C- B1 u - while (state.running) {
; Z7 z" B6 f6 {1 M! C' T0 B) e: q8 T - try {+ `! k; f, r+ D+ c1 h
- k += (Date.now() - ti) / 1000 * 0.2;
+ d9 @6 g+ B0 r% j - ti = Date.now();: ]: ^- k7 T/ E( `2 \
- if (k > 1.5) { {/ _: ~' }3 l0 D {
- k = 0;
) i* P0 b/ t1 i4 Y9 P - }
* S0 @! ~2 i3 S( O - setComp(g, 1);$ Z; V# c0 {. D0 }) ~# h
- da(g);
% L: W! I0 I6 `. ^7 L1 M% e* U3 u - let kk = smooth(1, k);//平滑切换透明度1 B* Q, O6 ]/ g% ^# N" E
- setComp(g, kk);% z8 U& }' R7 }
- db(g);
! t5 `& o/ `2 ~# C4 N - t.upload();; Q: z) e8 `0 A0 Q6 x' d$ ^, H
- ctx.setDebugInfo("rt" ,Date.now() - ti);
5 _8 J7 l& U; p8 _) o4 Y - ctx.setDebugInfo("k", k);+ d; W8 ]9 v! d5 p
- ctx.setDebugInfo("sm", kk);
1 A; {1 L& _' G1 p. x3 f- X - rt = Date.now() - ti;% \3 {; |9 f" p# p* w* m
- Thread.sleep(ck(rt - 1000 / fps)); r, H) s4 y+ ~$ S( m
- ctx.setDebugInfo("error", 0)! I b7 C3 ?0 c2 `
- } catch (e) {( I& w7 U( s6 u; x1 q: H
- ctx.setDebugInfo("error", e);
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- }, S0 O% x7 i4 }7 C+ W6 l
- print("Thread end:" + id);% ?+ [% c9 s. x ], j, @
- }
4 g2 h" d/ A6 H2 G2 T8 o - let th = new Thread(run, "qiehuan");
0 _5 c8 |: e! S8 r( F& x1 F% _% C - th.start();/ ]8 H2 o7 m# D1 p! k
- }5 \% [5 C% D5 L; Y6 f
- & @2 e) T; X' K0 g
- function render(ctx, state, entity) {
# B$ q+ ~: K+ W - state.f.tick();) [ `1 K; g8 s0 m/ h; O* o
- } a& L& P: ]) r+ i, d
2 B& b1 @8 g7 u% i- function dispose(ctx, state, entity) {! m* }+ F2 V" Y- D, a( l
- print("Dispose");
! {+ j/ D7 s( k9 ^! X - state.running = false;
- @$ I1 S# J2 E @ - state.f.close();; w; v9 {! G* h$ q- p) N/ w y
- }
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& s& n; V4 U: S6 G0 F% K. ?- function setComp(g, value) {
. b! W! Z- F' c5 y; X% T* a' x - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 n! T1 R, j0 ~ - }
复制代码 " U5 Q7 h9 H: @; h* r) |$ O
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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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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