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/ u: k5 \: k6 }. I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。8 d$ @, m( y/ A Z# @" c- K" h
- importPackage (java.lang);3 e( s G- @9 W
- importPackage (java.awt);! R: o. e* g3 h( w' m/ \3 a% j/ @: E
/ K- U$ `; p3 U) r$ e0 I+ ?- include(Resources.id("mtrsteamloco:library/code/face.js"));1 O- u$ b- p2 }3 J+ v
- 5 V. V9 i( c- }! C4 G% L" x! A
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, }0 n/ K- m% [& B9 k0 }! V
- 8 a" G3 b! K# g- h4 T
- function getW(str, font) {
Y4 V) x% |8 k6 ]0 X - let frc = Resources.getFontRenderContext();( [" N7 }6 W) B6 y
- bounds = font.getStringBounds(str, frc);1 O. y* o- x" r0 }0 x! i% y
- return Math.ceil(bounds.getWidth());- L, h- [4 G9 m. [3 ` i; y6 ~
- }, ]) a% v5 A* P
- % c# {9 L* H4 @
- da = (g) => {//底图绘制3 G, X8 v; Y# Z) r8 p# \+ ]. L0 R
- g.setColor(Color.BLACK);
& Z ]5 J& z- d7 t - g.fillRect(0, 0, 400, 400);
( W0 G7 |5 A4 J2 y - }
% h+ a: K& B2 S - ; w" A. @1 a4 j2 \5 h u4 z
- db = (g) => {//上层绘制$ v$ u& c3 K. e: `. C* Q8 d6 Y
- g.setColor(Color.WHITE);
F5 _, ~% ~( {' {" P. J - g.fillRect(0, 0, 400, 400);$ \" y. b2 ?0 {- R: b
- g.setColor(Color.RED);9 ?% u' Z% p$ F$ m% N
- g.setFont(font0);4 Y" ?( F& H K3 \
- let str = "晴纱是男娘";8 j j Q8 m! o C# H* ~
- let ww = 400;& ^" j8 w5 `3 l+ |$ H
- let w = getW(str, font0);
3 E# ~6 C! ?0 i1 C1 Y( u1 L. S. m! C, ^ - g.drawString(str, ww / 2 - w / 2, 200);
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: \0 u* {! v' `9 a7 K- const mat = new Matrices();7 {' G# Y; W; _. b
- mat.translate(0, 0.5, 0);
% r6 B, z7 \. ^+ S5 M: |
7 @( q$ N0 j1 S9 Z8 \: j8 T- function create(ctx, state, entity) {1 v6 Q: F: p3 s
- let info = {
. b. k. ]2 r* x" g" h* T% B$ U - ctx: ctx,
, P S8 T! l; j* W" e1 o - isTrain: false,* }: e7 @7 K; A3 V& k& H& P4 Z' M7 P
- matrices: [mat],. k/ G6 L7 y. U
- texture: [400, 400],
0 p% n: }$ s5 [ - model: {
4 X8 a8 {4 ~" y9 V1 T" t2 `' } - renderType: "light",
; T, o; f$ O, H! S, o& S% y; f - size: [1, 1],
9 n5 d! Y( F4 r: [1 G/ F; b - uvSize: [1, 1]
; q8 O% G, D J- A+ V7 `( ]0 `2 h" M - }
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- let f = new Face(info);8 p" I" l+ _/ a
- state.f = f;9 i8 G1 l5 ~! h
) |+ ?5 H: _+ i& D9 A6 r" v- let t = f.texture;% E0 ?' H; V9 v* y3 l
- let g = t.graphics;
+ N* d" k' b+ K+ _# S3 S6 ? - state.running = true;6 Z" q X! X; I1 Y! g6 @
- let fps = 24;- c K E* _" v1 a
- da(g);//绘制底图
5 W" ^' H% G: A/ Z9 M9 r - t.upload();
) b x) E4 @0 C* q3 Z B8 s - let k = 0;: a; M9 X t0 S3 ]4 b+ v
- let ti = Date.now();7 n+ r7 g' _4 i, l
- let rt = 0;
, ^" y, Z W/ T( B. z0 t - smooth = (k, v) => {// 平滑变化
* q% Z+ w( n3 t: \ - if (v > k) return k;
" s4 ~; a- E7 I. q - if (k < 0) return 0;. @ d% f9 X; w+ I/ i
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( A, ?9 M* u5 ~% [ `6 B. ^$ @( K
- }! \+ d# h$ n0 s% z& N- \
- run = () => {// 新线程, N2 k5 ?) h9 n) E5 q& P+ r
- let id = Thread.currentThread().getId();
, T9 U+ y! |( v% @/ X6 n: K0 f# ~0 g - print("Thread start:" + id);: y0 t6 a, j- I1 |0 p" W$ k( E# _
- while (state.running) {2 Y$ |6 Q, N$ P3 |
- try {3 o$ H+ t" P7 F; S9 m
- k += (Date.now() - ti) / 1000 * 0.2;$ {7 f3 Y/ c# a
- ti = Date.now();+ |! q0 P2 | w
- if (k > 1.5) {+ h" u( ^6 ^! Z. I* |; [/ p8 u
- k = 0;5 \- }. w6 Q0 C( @3 x" W: E K
- }
# T/ b. f$ y& i/ v - setComp(g, 1);
t4 a( T+ O/ W( d- R - da(g);
' T- z) d- `+ s X; i - let kk = smooth(1, k);//平滑切换透明度
5 P9 T( M! a& R1 {4 [ - setComp(g, kk);* k- v& U$ b* Q4 j* A; H: i
- db(g);4 R. ~* b& g, m# t T+ C# l
- t.upload();: S3 z0 B' ?: S, G, g
- ctx.setDebugInfo("rt" ,Date.now() - ti);( p! Q. _# F' X& J4 D" }; k* s8 p
- ctx.setDebugInfo("k", k);
% y: Z# o0 ~& @0 A$ z - ctx.setDebugInfo("sm", kk);
" B! b T- C5 y" ]. ?4 p - rt = Date.now() - ti;
" g$ e) e g: X2 F* V0 P& p5 r M - Thread.sleep(ck(rt - 1000 / fps));
6 E9 e' z: N' C - ctx.setDebugInfo("error", 0)
5 z/ E0 E- _ ^' u6 m* K5 q" t3 u - } catch (e) {9 e. C0 u4 w/ `! K; R) j
- ctx.setDebugInfo("error", e);! G6 }, s! G9 }8 Z' {
- }8 M/ C& w1 |- O/ n/ s/ C- X
- }
1 w& h1 \. h; | x - print("Thread end:" + id);+ S% l6 b/ B6 f7 ^& D; N, U
- }
$ e9 a1 J+ [/ |+ z4 V3 p - let th = new Thread(run, "qiehuan");
3 G0 ~* b1 ]" Z7 {( X6 G - th.start();3 \# r! L4 a( S( u6 h' {$ x5 z3 D
- }: ?: s8 T1 o( Y: n3 t
( G! F8 h/ X; E- F1 H- function render(ctx, state, entity) {
% U0 }- S- q* S0 z! |9 @& e, |: ]9 c - state.f.tick();
/ o. o' Z5 L6 N" b1 P4 U - }
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- function dispose(ctx, state, entity) {
7 ?* @6 N% O1 w W0 X - print("Dispose");& v( F; _4 q* A5 v; ^; Q
- state.running = false;
& f2 T, w9 s' q: }5 G& v) ? - state.f.close();$ x, L3 w- w% K& R
- }
( ^# |: l& v" p - 2 \" V/ n0 C# {" v& i% P
- function setComp(g, value) {2 S! L. M1 ^" `# C5 p$ Z! |1 G% ^
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 \# `$ G+ M$ u/ ?) a - }
复制代码 9 g0 ^* q3 T0 ~& Y4 e
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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