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! g5 I8 M) k% z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。( v2 u# v+ N+ F m
- importPackage (java.lang);) y0 ]) n# L: a8 H" L# q6 R
- importPackage (java.awt);/ q: N% a7 ?( B* z5 w
- ' `0 F- I0 C" }4 w; m
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# N# E7 u& f8 q% h5 ]: T" N( B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ @1 E3 q, e2 D0 x) T
- 9 r4 h4 H9 f- f
- function getW(str, font) {
. N0 P! o) h6 s0 ^% i6 e - let frc = Resources.getFontRenderContext();
5 v3 e! a+ d: w6 K2 t, b7 c6 i, N - bounds = font.getStringBounds(str, frc);
4 {- ~) ]/ N% Z9 N# w2 w2 `, V - return Math.ceil(bounds.getWidth());& a2 Y1 Z2 o- Y
- }: Q/ n% ~" r9 g1 U( O
- 5 |- z$ a' E: P# Q" y( D
- da = (g) => {//底图绘制8 q: k; p. a* E) b- [
- g.setColor(Color.BLACK);7 B3 p. p) \) t
- g.fillRect(0, 0, 400, 400);
. \5 J1 b( q2 \$ H! \7 c, { - }
5 |/ v5 |; m* n; V: Q9 n - : A7 |. Q! `* X7 T: [4 e
- db = (g) => {//上层绘制
+ Y; k- B" e' b9 w z( ]( G - g.setColor(Color.WHITE);2 q7 _( {! y1 ] `2 y9 E
- g.fillRect(0, 0, 400, 400);
" ^4 c8 z! U4 K! M - g.setColor(Color.RED);
4 n5 R4 {3 T# v5 w2 K, J e - g.setFont(font0);& [7 d3 h$ y0 K3 H
- let str = "晴纱是男娘";
) T$ o9 Q' _7 d0 k, K9 ^ - let ww = 400;) }& p7 ~& ? h& {% }7 p6 Q
- let w = getW(str, font0);7 C& h0 D; h- s' t. i# a" H( q
- g.drawString(str, ww / 2 - w / 2, 200);* }( x. Q' M q3 p
- }2 h% s; H9 G; }! M
4 Y* I n' g @+ h) h+ d( _1 X- const mat = new Matrices();
; f' a$ D& s6 V - mat.translate(0, 0.5, 0);( n. d; h+ R+ k8 [1 r
- $ b4 t% _. p- i1 q9 v& M3 N
- function create(ctx, state, entity) {
; |) D+ S" ]" b; ~ - let info = {7 P* X% v/ K- v
- ctx: ctx,
+ \; v) e k4 z& W$ a+ P - isTrain: false,! K7 J% S: ~. P5 l+ A- ?/ T
- matrices: [mat],
- H4 Z( G, f9 D% P9 s - texture: [400, 400],
9 j# O: N% c( B! i& l! @ - model: {% U# G0 L) o0 o- ~" h' R+ s' |
- renderType: "light",$ w8 L5 _. l4 _- S
- size: [1, 1],
- b( h4 g& @5 f3 \ - uvSize: [1, 1]
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- }$ n2 G( j; [* Q' _ g, S
- let f = new Face(info);
; a$ w7 q% R! i/ H - state.f = f;
* W |% o" e0 t
- B1 Z8 L1 }! E1 t- let t = f.texture;% L1 u8 D( I8 ?; w3 B
- let g = t.graphics;
7 }: P1 |8 M9 N' C - state.running = true;
+ t0 m4 D% [4 U5 D3 E - let fps = 24;
. t& N& J5 \8 Q c/ t! F) l, l* g - da(g);//绘制底图: B/ c& J) n/ e9 W4 ?1 f2 P
- t.upload();
9 g \3 h3 X$ m% j3 f - let k = 0;7 |4 [$ h7 C P. |+ |9 a
- let ti = Date.now();
. c" [; `# q# Q0 {! r - let rt = 0;
, [2 ]3 }; l( O8 o - smooth = (k, v) => {// 平滑变化
. {, ]4 K8 v; U8 d - if (v > k) return k;
' |7 R) \% k% n O - if (k < 0) return 0;& e2 h8 N) a& L- V! I+ ?
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 s0 t0 X+ H3 \% j0 d% T6 h - }4 `! c" y2 s/ x) E2 j: t k
- run = () => {// 新线程
1 S2 Q& |" @' j" t+ d- m8 o2 r- n - let id = Thread.currentThread().getId();
5 _) ~; W) D, p" x0 K1 k8 ? - print("Thread start:" + id);! m+ z4 k2 q$ S" }+ t0 B
- while (state.running) {( D* a4 f7 P( D# c1 Q
- try {
8 _; A9 a: a, u; U K5 Y" i+ c: A - k += (Date.now() - ti) / 1000 * 0.2;
; L, t1 z3 t; F/ |. k6 Y - ti = Date.now();2 J8 ^6 ~) \( q
- if (k > 1.5) {
1 F& i; C" u) W5 D3 Y4 |, l; r - k = 0;
' W' R3 J" ]+ i! c) s - }
& J% H2 L& j1 l! @! S3 ~0 ~ - setComp(g, 1);
B9 d F* D( r' `! X% E8 v - da(g);4 y8 `) w7 s" R; D+ {( b3 g: o
- let kk = smooth(1, k);//平滑切换透明度; m8 {$ {0 R1 g
- setComp(g, kk);8 d: ~+ x' u: T0 _3 W
- db(g);( N2 R6 w/ a K3 f4 M
- t.upload();/ w! y3 ]. p. u0 o
- ctx.setDebugInfo("rt" ,Date.now() - ti);
1 |6 P$ Y; M. s7 p# Z0 `4 V. i - ctx.setDebugInfo("k", k);
5 W8 y6 `* |1 {$ A' q7 l* F - ctx.setDebugInfo("sm", kk);# W# |2 v% p, R `$ i1 p4 h& i# Z
- rt = Date.now() - ti;+ f- h, ^$ \' K7 y/ A
- Thread.sleep(ck(rt - 1000 / fps));: p2 n8 M" A- k
- ctx.setDebugInfo("error", 0)
& h0 @9 a/ G- v( j" u: ?2 I( Z5 j W - } catch (e) {
* K# c D- [2 @7 n" }# O4 F1 Y - ctx.setDebugInfo("error", e);
) k4 n7 H# U( f) g" M7 ~ - }
" w9 Q0 |3 J8 Z' |6 K - }
* I, |: J! h# D% Y1 i) A6 @ - print("Thread end:" + id);
3 X4 d; a, `& ]- d% G - }
t' l6 s, k9 x! C; N7 f. S - let th = new Thread(run, "qiehuan");7 n* _8 n3 k, F- Q/ w2 G
- th.start();
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- ) I0 L: ?" x4 U' W, t* x# I3 v
- function render(ctx, state, entity) {
) l4 q7 T# W) y3 a4 ~2 r - state.f.tick();2 l% P' b% A; d, k
- }
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8 \7 s; P$ X' h8 D4 ]; B- function dispose(ctx, state, entity) {
- c% B( ~/ e9 w: r5 k" o8 B - print("Dispose");9 e9 F5 s7 T) Q$ l0 ^0 _6 q
- state.running = false;
W7 i# t8 h* k - state.f.close(); b; b$ x9 @# I' C! d
- }
) w- G {1 r# Q2 d
$ E, t' s* G1 l- function setComp(g, value) {
' i2 S# ?. `6 w+ q8 I9 ?4 h - g.setComposite(AlphaComposite.SrcOver.derive(value));" D P3 C9 C1 i2 p
- }
复制代码
( P; H1 d1 G. G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。% i( [$ E' ^) o/ T
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\; E c% t3 r& H. Z顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* W5 f# R' F0 y* z( o% V
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