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) o: X: R1 [& m2 s6 X6 o9 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。1 ], U6 o. v: b; U8 O7 Y
- importPackage (java.lang);$ X9 D: p7 f4 ^8 {
- importPackage (java.awt);' U4 P: v( f; W
- f5 b$ I8 L2 p, H- K1 N0 V. l- include(Resources.id("mtrsteamloco:library/code/face.js"));! `- {- b% U8 U0 |2 z9 f, L7 S* Y
- . z, V" k/ ?* _- b
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
e* Z! M( n9 s6 I) J
9 q, ~1 `% H3 Y5 v- function getW(str, font) {: H. P( k/ K6 _$ g! S
- let frc = Resources.getFontRenderContext();
5 ]2 j, v* ^, {/ ~ - bounds = font.getStringBounds(str, frc);# \2 V4 Y# `4 e' \; r* ^% l
- return Math.ceil(bounds.getWidth());
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- 6 p- ]7 r! ?" S, s
- da = (g) => {//底图绘制
% v' J; {" p2 _ - g.setColor(Color.BLACK);
6 k5 m! E6 n, `! B. \ - g.fillRect(0, 0, 400, 400);
. c- @% U0 b+ }' r; x5 ]% I - }! ?$ `3 ]4 s! n: ]4 q
/ | `7 Z3 J" Q' w- db = (g) => {//上层绘制
9 m. J }) o: ^6 n+ O - g.setColor(Color.WHITE);, l3 \% d& o Y# N+ O: U
- g.fillRect(0, 0, 400, 400);& f4 D% Q3 E- _, A# I$ H
- g.setColor(Color.RED);0 P, J8 `1 t% S
- g.setFont(font0);
% w' [( Z6 q6 Q8 J - let str = "晴纱是男娘";
5 @( \4 T. w' |* S9 B j - let ww = 400;5 y2 X6 E' ~: \" f! C, h. h$ Q3 D! }
- let w = getW(str, font0);
8 O/ o3 _! }. L9 P4 X2 @$ _ - g.drawString(str, ww / 2 - w / 2, 200);
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- 7 K9 g0 A0 g8 F
- const mat = new Matrices();; {) O9 q* ?/ C+ V# D8 o: E, @+ y5 i9 |
- mat.translate(0, 0.5, 0);: `& `6 }$ g! ]. g
) p3 }: h' ?+ `& F ]- V- function create(ctx, state, entity) {" Q: _( o# {. j! ?
- let info = {
& i: G7 v2 m6 t. z7 | - ctx: ctx,9 p _8 K4 t+ J& F# j
- isTrain: false,
5 ~' t w6 q& \5 q, T- h* Z. q - matrices: [mat],6 H: [0 t1 t5 u4 B/ H: p* f
- texture: [400, 400],8 d. E! P4 i2 E* H
- model: {
. C/ V% h6 Z! a4 \$ d - renderType: "light",
, I; z- E! j8 b+ R - size: [1, 1],
) O0 ?, U# e5 B$ o1 q( O8 g - uvSize: [1, 1]
: |& w6 \/ T- C( \ - }# }* T: C9 f! |7 g2 ]! s4 u/ T
- }
! i8 r0 |1 H& r) R2 X0 x - let f = new Face(info);
* c, M* P9 g, x; b0 h1 i - state.f = f;
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8 y! l# }% J. { ?& t- let t = f.texture;
4 G( D2 l+ P9 S: u# h: k& w" O - let g = t.graphics;
9 D4 _$ E6 ?8 o2 b" g6 _5 W e - state.running = true;+ w- |7 j0 _) W6 {$ L8 q* |* H4 L5 X
- let fps = 24;
6 j$ W6 |2 Y0 m3 s - da(g);//绘制底图
* W* D; I2 K- h! `3 ] - t.upload();
+ C% [/ ?" j0 ]- d2 u& \ - let k = 0;# u2 K+ T' T2 z; [# Z( E) |+ `
- let ti = Date.now();
. d* \5 Z+ _: G2 A' Y- i, e2 I# U - let rt = 0;
~( g, i% R" p' F; z. K2 Z% t - smooth = (k, v) => {// 平滑变化% e! l. F1 z1 }3 f6 s* r
- if (v > k) return k;
" S8 V$ \6 k R - if (k < 0) return 0;4 Z8 J6 r9 O; i( o/ W+ q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( r( L) S3 H/ L% ]/ m
- }
1 e" S4 C H' K) G; M - run = () => {// 新线程
8 ]& A: ^' ?/ C( ^0 K0 [' e1 u - let id = Thread.currentThread().getId();
- \( \( r7 g* I% j8 a1 |% h I - print("Thread start:" + id);* c' |: R o: _$ A+ m4 ]0 M
- while (state.running) {& B3 ]) A& y3 f6 O
- try {! M7 Q; I6 H1 d" T7 S4 }
- k += (Date.now() - ti) / 1000 * 0.2;' p# |5 s! b+ G
- ti = Date.now();0 B1 U8 T+ G! ]2 c2 [$ b9 N
- if (k > 1.5) {* H( Y6 }) ~4 f. f
- k = 0;* o3 \, C+ j. N3 C
- }
$ E h% n9 L% k3 |( E - setComp(g, 1); R! V6 ^1 s; P% M- |& \, I
- da(g);
- Z2 R( A5 ?! c8 f - let kk = smooth(1, k);//平滑切换透明度
: M; o' l- [) K3 a3 F: H - setComp(g, kk);/ R% Y! e: i; x4 A0 M
- db(g);
8 z" u0 d# n5 F4 I - t.upload();
% V3 I4 t% l2 t. `6 F( J% d - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ S" W5 V; ?. O, N; \. v F- c. q - ctx.setDebugInfo("k", k);
, U* O9 p6 C! B2 X: s - ctx.setDebugInfo("sm", kk);9 Y" L2 m; q1 P$ r5 N; A' c
- rt = Date.now() - ti;- c2 V$ N( ]- J' [
- Thread.sleep(ck(rt - 1000 / fps));
& V/ O' i ]( j3 C% z - ctx.setDebugInfo("error", 0)( m- w: A# Q, a4 u# ^
- } catch (e) {6 H$ h1 w% H3 @1 Q5 h, r- L5 C0 A
- ctx.setDebugInfo("error", e);
& D2 E% y4 d. p; h - }
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- print("Thread end:" + id);
3 q3 P: |: J, x+ s, T) [+ ]% J" y - }
+ u1 w% X" s; ^3 \ - let th = new Thread(run, "qiehuan");5 {7 F0 P- d4 u, ~& O/ P+ W, @
- th.start();
- g( V+ h# F2 { - }
+ F6 y. c$ \. u - & ^4 O# w- A$ x/ e
- function render(ctx, state, entity) {! h" ~* y a9 T' y6 f% Y
- state.f.tick();- O* ^2 }* Y# a, B4 u8 J* V: m
- }
9 c; E7 i+ ]" A. C
" u5 X7 t4 _7 u. G e* M- function dispose(ctx, state, entity) {
9 ^! d5 ?9 j$ `% q5 Y - print("Dispose");
. t) q+ f( I4 R$ I9 E) ]3 H - state.running = false;) B* _2 r W; u& I* |/ ~2 Z
- state.f.close();( J5 W' X2 n9 y
- }! r( _7 O4 g% @ d6 G. u
- 8 F- Q) E& ?% ] E7 N8 j
- function setComp(g, value) {
8 F% i3 P; Q1 B3 W/ k - g.setComposite(AlphaComposite.SrcOver.derive(value));( C6 r- z# D4 U3 |
- }
复制代码
/ C5 K3 P; S, @5 v3 [5 a/ y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)) C/ J; s# W' S7 T# }! v7 x
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