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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 P% S" g; Y" Y; c, `- w+ K r- importPackage (java.lang);; K9 f( s3 I% n6 c+ a
- importPackage (java.awt);6 K2 Q- u& C H0 n3 b6 M; k' X
- Z0 M& |1 q9 p7 H/ ^- include(Resources.id("mtrsteamloco:library/code/face.js"));0 E% s/ M+ P8 ?$ L4 l
- % f9 [$ A, D% a, M' c
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& K$ a5 ?( i% b4 w/ y
- B" i3 C$ f9 E7 q: W- function getW(str, font) {& c* w1 q. f% f
- let frc = Resources.getFontRenderContext();. D7 R4 v2 n) U' J2 [
- bounds = font.getStringBounds(str, frc);( P/ [* Z% {, } W6 e( b
- return Math.ceil(bounds.getWidth());0 R* B; J* D9 g
- }8 ~, ^/ r( M! i9 R l6 Y
! w: [1 m) ?+ a, K- da = (g) => {//底图绘制3 A0 z9 w; n3 A% ]/ S$ j" D; ~
- g.setColor(Color.BLACK);
+ V: p8 U* U, I* D0 s - g.fillRect(0, 0, 400, 400);
7 |+ H1 G8 P! E2 e - }$ R, Y) }% l' [& t9 @$ Q
- ' W8 `" ?/ B' i: m# z: k
- db = (g) => {//上层绘制
- t* v: S) N1 n- W0 r; X - g.setColor(Color.WHITE);; w" }1 b- y5 b; n7 y
- g.fillRect(0, 0, 400, 400);
3 E, m4 M; O5 ]9 x - g.setColor(Color.RED);
% e' ^. I! ]& k3 I, l6 J1 p- M - g.setFont(font0);
8 J8 W+ c7 Y$ W( w' u0 O& r - let str = "晴纱是男娘";" Q* k" I9 `$ G4 L* G7 R9 F
- let ww = 400;: g1 d+ t2 R% i& Y3 _# a. a
- let w = getW(str, font0);
: y, y& s: K- Q4 j! K% j - g.drawString(str, ww / 2 - w / 2, 200);
8 C. a' U+ p4 _ - }% t# ], x, T. e& e5 ]
2 T2 v# o6 e* }: I H+ F V- const mat = new Matrices();
& y3 z0 f% o5 f. T5 [8 F% P) ? - mat.translate(0, 0.5, 0);) t6 J$ c( D3 U! u) I5 m
- - [3 z8 d$ q5 G. }/ J l
- function create(ctx, state, entity) {! ~: G* h+ K& F: p; c* y
- let info = { G5 ?' d6 l% ?6 F" P1 U! j4 X
- ctx: ctx,, G8 q* y* v+ N2 Z+ z
- isTrain: false,
$ G$ {! \, C1 k1 _3 ` - matrices: [mat],
; j# s. L* h6 D+ C5 | - texture: [400, 400],. Q. T1 G$ `, {% ~" U! ~% `
- model: {
: z5 \3 G& h# J3 ^/ A - renderType: "light",
1 y6 q3 v0 h$ j' @ - size: [1, 1],
% D: N: ?% Y- i$ E' p - uvSize: [1, 1]
. S. p1 @2 R: G- u - }2 }; Y$ |5 `: l
- }( G% t9 g$ h# [. Z) g9 i. m
- let f = new Face(info);
+ Y5 Y" [% g( F/ z+ y9 Z - state.f = f;# t# H/ O6 \+ N
- } [+ j# E1 r) j, X4 q- let t = f.texture;
, i4 ?0 b2 ~$ H8 e# \ ^9 ^ - let g = t.graphics;
" ~* j1 u) p- _4 |; P8 J - state.running = true;) T p! y3 r N
- let fps = 24;
2 }1 y+ Y, j- Q" x - da(g);//绘制底图
4 q2 u* f N- v* } - t.upload();- ?5 m H! n/ w, o/ r- \
- let k = 0;
) A, J ?: W& X) ?3 W6 a - let ti = Date.now();3 P! H$ v1 G- u8 e. A5 c+ _$ x
- let rt = 0;
! D% N! w2 a/ m& t - smooth = (k, v) => {// 平滑变化# ^( p3 y; C7 D3 W% {2 ?
- if (v > k) return k;
6 r# N1 C0 K+ x+ s# \, R- f$ w - if (k < 0) return 0;9 ?' h. @% I2 _* Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 \% Y3 ~4 |- W! z5 U - }6 d: z! y9 Y0 z1 l7 X' `/ o& a6 K
- run = () => {// 新线程
9 O) W: I5 c E1 z! Y4 t& b - let id = Thread.currentThread().getId();$ ~2 \! C3 i; R( c: ]& V- `( T2 d
- print("Thread start:" + id);% ]8 E* ^ q$ K, d' E- [' H
- while (state.running) {* R1 t n+ A( g# v
- try {
6 g- G1 `! t4 Z. A' x. N+ N1 Y2 | - k += (Date.now() - ti) / 1000 * 0.2;- x' m, e, D4 t9 {2 N7 V
- ti = Date.now();
4 J! \' y8 X1 b5 E; { - if (k > 1.5) {: |% U, R, P. L9 w' d/ Q
- k = 0;! o& t) M1 C3 a, ]1 _. d
- }
' Q% Q# Y$ O c3 C1 t3 v0 w% X8 ] - setComp(g, 1);, W4 H {1 x# u/ C$ T
- da(g);. \5 B- ]1 \! S7 c( h
- let kk = smooth(1, k);//平滑切换透明度
' |" E2 D J \( Y8 `# s) }5 z - setComp(g, kk);; p8 E; v* a/ _. I4 y
- db(g);' k# e9 B- F/ J
- t.upload();$ _, m' x& H8 K. Y+ o0 O2 J0 }
- ctx.setDebugInfo("rt" ,Date.now() - ti);/ C" ]* \9 ?8 y0 ]/ U2 P6 l
- ctx.setDebugInfo("k", k);
* D0 K, n2 G; g: c9 c7 ` - ctx.setDebugInfo("sm", kk);# ~8 P% e- P: O- X2 N/ L
- rt = Date.now() - ti;: z2 z7 i0 Z1 T g# U$ L7 p
- Thread.sleep(ck(rt - 1000 / fps));+ ^; z- G7 L) ^# ~+ Z0 S% v" E
- ctx.setDebugInfo("error", 0)
' ?" b g' n0 n - } catch (e) {) s( L9 a( L$ Y0 E
- ctx.setDebugInfo("error", e);
' ] G6 C7 p2 o# \. \3 w1 { - }/ N7 X% }+ u2 m! o0 r. L3 i
- }- ?6 t9 w' [9 s" q$ [# d& T6 h
- print("Thread end:" + id);/ Z2 p3 p, K5 O* t1 C
- }
. r' o9 _4 a* ^; Z! L - let th = new Thread(run, "qiehuan");
( E2 ^0 H* X8 o- s3 L - th.start();4 l) Q1 P% c" R, y1 u8 q
- }
; r n' m2 \8 u+ d - ; j9 O' x/ v, _' i
- function render(ctx, state, entity) {# W9 U. T& Y5 y/ q. q, l; }4 m( I
- state.f.tick();
) B4 w- t6 b% W, u - }+ }/ g, w" n* @
6 }+ Z# F: i4 J% l$ e- function dispose(ctx, state, entity) {
8 l* Z+ C- E+ i; P! ~ H p8 N - print("Dispose");
3 M6 e3 g! |$ Z' w - state.running = false;" r9 v8 I8 W' i( P# \7 a
- state.f.close();
' V0 v4 `9 s9 a" o( T! i" b& | - }' |- h* D1 I* P- |
) c/ ?% \6 l) q- ?0 V- function setComp(g, value) {
8 L0 R P' Z9 M1 G - g.setComposite(AlphaComposite.SrcOver.derive(value));
) B6 S1 p$ w. b' L/ l3 s( w - }
复制代码 r/ b3 \" a$ t8 N5 ]
写了这么久的js,我便渐渐发觉使用 render 来写更新内容有局限性,比如说会拉高延迟.....等等(但可能也没什么影响?)。在这里我用新建 Thread (线程) 然后在新的 Thread 里来处理图片更新逻辑,实现丝滑切换。
Y" i) }* L7 x- l$ S6 X- J2 f) \) P. \' d+ y1 u% j
% E7 @* \8 v$ o) K顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): t1 `: N$ s; `) E" @' p
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