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, V R* U8 d$ K+ D( k8 J E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。
7 ^0 |! X2 A; ]# E6 D- importPackage (java.lang);
# N/ F2 `6 I) T" n9 D! j - importPackage (java.awt);
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2 n0 Y5 B! C- K; N5 Z& O9 P8 V- include(Resources.id("mtrsteamloco:library/code/face.js"));6 _! ~& p& V" s9 e0 k
- % {+ t% y A5 T7 O1 w5 _
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
' `$ Z% x9 m# }. A/ d, } - let frc = Resources.getFontRenderContext();( u$ A- v7 o1 }: Y/ Y9 W* w1 J
- bounds = font.getStringBounds(str, frc);' B9 }6 I/ j! r' \$ O; k
- return Math.ceil(bounds.getWidth());( u/ i, H) T3 ^/ t/ O7 r1 C0 K2 H
- }
8 x3 t- r q8 i7 {9 P* W1 Z - & W" i4 u% W4 \2 b) d. t
- da = (g) => {//底图绘制
5 g9 q5 e* _, C( T) c* g - g.setColor(Color.BLACK);. L8 o6 u/ W0 Z8 }$ Z F9 L, j. y
- g.fillRect(0, 0, 400, 400);
1 k3 {+ ]& Q" @' D2 x% E e - }
+ o) c5 j$ l4 s- ?7 J
a' {4 ]8 b8 l, j- db = (g) => {//上层绘制
4 x/ _+ E8 q. ?7 H" p2 C7 N - g.setColor(Color.WHITE);( E S" W1 X1 m2 U A
- g.fillRect(0, 0, 400, 400);
' A6 Z1 M( a: x& a/ _% `( z9 Z r7 [ - g.setColor(Color.RED);+ a) I6 [3 t8 b# u+ I% Q1 _* c$ G! {8 r
- g.setFont(font0);
. O3 i: W/ U- w8 \# f% B J+ x' T - let str = "晴纱是男娘";
; a) i- t, r% D1 Q% G - let ww = 400;
1 D* _0 Y$ D8 [9 D) Q0 m# {* e( U - let w = getW(str, font0);& F# l7 u. h! Z. Q7 |
- g.drawString(str, ww / 2 - w / 2, 200);
! `2 |7 L& m+ _ - }
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8 j) ]$ \* l( @4 p" I" T" W1 ~% F8 x& @- const mat = new Matrices();2 \ Y% S3 s. _( O/ B+ g
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
1 T: Q' ^& f. j - let info = {. L/ Z% l& D2 n' b5 A3 E
- ctx: ctx,( j8 W: P1 A6 y) Y, c
- isTrain: false,
7 z9 k* V) I3 Z1 d. c) ], E9 n - matrices: [mat],
% e. X) O5 Q! n4 W: ^/ g9 _& F4 W - texture: [400, 400],4 r# k, R$ B9 h" O/ n
- model: {
2 O/ `' p/ w$ e O - renderType: "light",
" T2 J: u; Y! _8 F - size: [1, 1],
8 G+ M! M, n) J- U - uvSize: [1, 1]
& q9 w2 w) z0 i - }
2 R4 q& r9 ?6 J- L5 P6 u: D - }- \2 f# Z G; X1 `& z4 L% S
- let f = new Face(info);7 G5 F( _9 \/ y' S" u5 \
- state.f = f;% N4 g7 Q$ s' M
3 D4 [4 [9 _: w4 s3 V4 s- let t = f.texture;
3 Y8 k! J! @: B) N9 B - let g = t.graphics;
& a: q* E/ E) P v6 i7 p. \: h - state.running = true;, ^' f- ?) Y2 G3 c7 v
- let fps = 24;$ M& ]! m2 b% \/ i' X/ L. T
- da(g);//绘制底图
( e! O/ }5 g, g - t.upload();0 k) |4 P$ v2 q6 z/ _$ [1 f
- let k = 0;
' {' c' V* k0 y: ^ - let ti = Date.now();
8 r) r" ~% c, q4 d& a- x- o& G - let rt = 0;$ {9 F# x5 o' d
- smooth = (k, v) => {// 平滑变化
0 |- _/ p1 ?' Q) R - if (v > k) return k;" `8 t- \$ t, Q
- if (k < 0) return 0;, }# R' f' t$ ^- q1 i5 J" v, A
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; E) R4 ~+ P Y7 V& ?) Y1 Q5 ^ {
- }) I& ` D" } u. |- d
- run = () => {// 新线程
0 G" K4 t8 @/ S- o! s& A - let id = Thread.currentThread().getId();6 _; H! u; C( [2 L
- print("Thread start:" + id);% ?3 n& q$ S h3 y5 @* n
- while (state.running) {% A% u% V4 H8 K% J
- try {8 `. k6 y9 q: D
- k += (Date.now() - ti) / 1000 * 0.2;
: S& v# R4 D8 x - ti = Date.now();! W* S: C3 q' _6 T# a+ F
- if (k > 1.5) {
/ q4 W j% A& h$ P1 o2 ^: G; r - k = 0;
J) k( }& l- ~2 x& a* _ - }
4 R( J. n) j" u2 [( ~& O' d - setComp(g, 1);
' T0 ~5 w; f% k( i0 b - da(g);: J5 Z% O1 w8 \6 F( r$ q
- let kk = smooth(1, k);//平滑切换透明度4 N1 z; J& A1 h' l; c
- setComp(g, kk);
% Y! o' J" k- z - db(g);
0 j- ~) o6 ^) {, h - t.upload();( r) O# Q) E2 p% [, O$ J
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( W# W( ^2 w* j, r - ctx.setDebugInfo("k", k);- D- w, ^1 K2 {$ o$ \0 E
- ctx.setDebugInfo("sm", kk);7 a# Y- ^5 o) l
- rt = Date.now() - ti;0 E! f) u( \. h4 Q, o6 l [( \
- Thread.sleep(ck(rt - 1000 / fps));. l: d+ b: u( m- d6 I/ P& t/ t
- ctx.setDebugInfo("error", 0)/ Y6 ?+ u" O/ W9 h7 V
- } catch (e) {: Z% r3 W% k+ t8 F( u$ u7 h
- ctx.setDebugInfo("error", e);& H6 y+ Z3 y5 b& \+ e- Z" G
- }
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- print("Thread end:" + id);
$ k. J5 I3 P) @/ d - }
/ u X9 ~7 s) Z2 W0 R - let th = new Thread(run, "qiehuan");
0 D& r9 |2 y3 W, M4 [ - th.start();
; x+ w$ M. A" s: }% ^5 x# V - }
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( ^5 _; q# b7 _2 _, Y- function render(ctx, state, entity) {8 r) ~2 ^6 E2 R; G2 v
- state.f.tick();4 j+ g% R4 f& l; n
- }
3 V: f" P' C% Z, T7 V- P ?8 F9 e m4 a
( b, j6 p5 O" X* J- function dispose(ctx, state, entity) {
* ]3 j" _4 R8 \- P, l( i i, U- t) E - print("Dispose");% Z/ Y" [3 _! X# k+ u: ?
- state.running = false;+ Z7 ~" O" o$ c" o
- state.f.close();( R& Y9 [% y4 }8 s# u: R$ Y7 e
- }& B! y! t& M& X, k3 R2 V
- 0 e7 P, _; D0 |! \; `7 @# @6 J. h
- function setComp(g, value) {4 Q) K5 ~3 K' c, Y2 P- w) ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));; [4 `$ i4 }4 K! X6 p' \0 q
- }
复制代码 + Q. V% q! T/ l6 E( \# I
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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