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# v5 g% o! b: r) Y2 ~( h; a, f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。
! L( y7 Y5 b+ u6 g6 t- importPackage (java.lang);
8 U- ?' L6 C2 | - importPackage (java.awt);( g- y: W4 o/ _5 ]2 A
- / j( R( i; x; ] j" n; b+ S4 S5 K
- include(Resources.id("mtrsteamloco:library/code/face.js"));& t4 m9 f, `/ m6 K, F& h0 Q4 R! d
0 N; C& n: Y1 {, L; K1 q( T- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 u4 ~/ c0 j1 V; c1 }
- , V9 m/ d5 L0 N4 f7 S
- function getW(str, font) {
7 u2 I8 ]! _/ n1 P& x - let frc = Resources.getFontRenderContext();' W' N9 }, ]2 `3 z# \+ Y( g% v
- bounds = font.getStringBounds(str, frc);
3 Z" u. U4 y" I - return Math.ceil(bounds.getWidth());. \$ r& @: N1 P( q: u- P2 Y) T
- }
3 @7 c, |6 }2 F& J0 P) c
4 F; D! ]0 _6 M! |5 A/ J/ |9 Y5 K- da = (g) => {//底图绘制
( u4 N1 U9 v0 T2 r - g.setColor(Color.BLACK);( E4 w" s, I6 u. T
- g.fillRect(0, 0, 400, 400);6 b9 ~7 h- D1 v# M' g
- }4 k% R% G; v1 z) Z3 r6 Q8 G
( n" Q! e, l% S B% K4 Q- db = (g) => {//上层绘制4 u _# @0 ^3 g0 D
- g.setColor(Color.WHITE);
4 k& G8 h: u7 y h! R - g.fillRect(0, 0, 400, 400);6 c* A6 ~% Q3 Z8 m" N( o/ L: N
- g.setColor(Color.RED);" A7 p: b* y, X& @ H2 P
- g.setFont(font0);( t: z5 y; b+ c# w9 b% Q) g* q8 S
- let str = "晴纱是男娘";
, Z7 \4 ]6 ^8 ]/ c _1 O# c - let ww = 400;
; M3 v" l F2 T8 F/ R - let w = getW(str, font0);
" P% h6 S# }, M8 \7 C; C) { - g.drawString(str, ww / 2 - w / 2, 200);3 W8 c! e$ O, G ~
- }2 n! _, a9 S! m/ K0 v" e1 Q
0 e% y) [: I$ a( G' G$ z- const mat = new Matrices();% T P' n! b" l% d8 K5 }
- mat.translate(0, 0.5, 0);
& ?; z# ]" c5 P7 o4 u
- |/ U" Q9 @) u( o" y- function create(ctx, state, entity) {
4 b. y% A9 t8 \' e7 u - let info = {5 Z% b: }( \: y; U! l& a3 ]
- ctx: ctx,
: K! x! H7 ]1 {) k" } - isTrain: false,
0 L* y4 m. n$ ~0 Q d" A - matrices: [mat],
* d$ P0 D: f; D( O( I _& {; I2 t8 ` v - texture: [400, 400],$ s+ x% [. {, q. c: e- _$ q
- model: {; f8 {$ g# W! Y% n$ s0 [
- renderType: "light",
, |2 H2 m! l# Y t* X - size: [1, 1],
' y$ h1 X: j. R! E - uvSize: [1, 1]
( z) u' P7 V2 E - }$ c: K: N7 O3 u
- }) ?" _* ~' o$ d7 H8 N
- let f = new Face(info);+ ~, z& g# a: c. T$ ~
- state.f = f;
% l6 u2 o5 Z: o: a - ; ]# w9 W: B$ ]1 x" E l1 i
- let t = f.texture;/ F0 i/ }0 ^; [. b; D! }
- let g = t.graphics;
! a4 S( e" p& E5 @ - state.running = true;
$ P; V. J3 {7 t5 K - let fps = 24;
. a' G3 n4 H/ a% N, Q! V - da(g);//绘制底图
( T' @* h7 j) O% C - t.upload();4 A/ ?! E& k/ A: w5 H1 _0 c; r
- let k = 0;
2 d1 ~$ f! _' ^/ m - let ti = Date.now();
' l% ^8 U, e R/ O6 a0 [4 g - let rt = 0;
. i! \2 U! I1 x - smooth = (k, v) => {// 平滑变化1 C o* l+ ~9 T' e- Z9 r$ k3 h; [) A8 g
- if (v > k) return k;. }9 U3 _/ J3 V, ^. H! m
- if (k < 0) return 0;
5 y0 p& Q* R6 ^+ n6 z$ b - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; h, ]# Y6 I' s& ~ _! _/ v
- }( k- u9 N/ A8 M" V
- run = () => {// 新线程" S+ r( C7 F2 h0 Z
- let id = Thread.currentThread().getId();
# C: Q9 H5 _0 X - print("Thread start:" + id);
' t0 q2 P/ i* t2 ?4 p - while (state.running) {% X" w: p7 J! ?; T+ S0 D$ q4 ]) V5 E Z
- try {
$ J9 i O( _6 N - k += (Date.now() - ti) / 1000 * 0.2;
* `/ _! [ v" I" G N - ti = Date.now();
( _% } e' }; \# ] A - if (k > 1.5) {
4 u/ @8 F; J- Z# } T: t7 n - k = 0;
/ w# \' m c9 d! ]9 Q& d, E - }
& e- k& {9 r6 o+ W9 Z, u8 U- ]5 n - setComp(g, 1);
- ^" B4 ^9 Z% k$ m - da(g);% v! K. ^7 J+ ?8 I
- let kk = smooth(1, k);//平滑切换透明度
1 H; V8 ]1 ?+ B# _- N5 u) P+ h - setComp(g, kk);5 Y, n7 h$ X4 i! u; ^
- db(g);* A A/ y8 g& n- \4 q. ~9 e. C
- t.upload();
$ j/ C/ ~& ~4 y, J - ctx.setDebugInfo("rt" ,Date.now() - ti);: u3 u, E3 Z+ I" [3 t! d9 I
- ctx.setDebugInfo("k", k);; ] P. k8 {7 n% f" y' m* y* k: s# t% u
- ctx.setDebugInfo("sm", kk);
; p4 [& E! g4 B9 Z0 B* t - rt = Date.now() - ti;% v6 M9 [; {# U6 u' J' H3 z
- Thread.sleep(ck(rt - 1000 / fps));& h% i/ J; g' x; F9 ], ?
- ctx.setDebugInfo("error", 0)& w# b. l! d6 x P* c
- } catch (e) {
' T$ I/ H1 T1 C2 g& F - ctx.setDebugInfo("error", e);# g9 {1 y# S v; {+ F( V* k1 o
- }
) x, M6 @' n: L. g H1 l - }
x% W0 ~7 Y3 ^$ S! J" H - print("Thread end:" + id);, H, q' P) G1 r4 W q9 @
- }
0 Q! Y; k& o+ F$ ? u) b8 ?' G0 M# G - let th = new Thread(run, "qiehuan");2 F; {( z( ?2 f
- th.start();+ X4 O8 b4 ~) G8 t" V$ Z* G0 n
- }
$ V% o4 }4 a* Z2 R' ^% d, Z* F
6 ?; L( V* f2 `! t! P( }- function render(ctx, state, entity) {/ I$ S' [ |9 M% v7 ^1 ?, I
- state.f.tick();; S3 n6 ^% b. }
- }7 e9 l4 L2 W+ R
- . }1 F! _" m! H$ O5 [
- function dispose(ctx, state, entity) {/ b9 _( t: E, ] H
- print("Dispose");
' q2 S7 K: u6 F - state.running = false;7 b6 ` p3 i* ?3 |) T
- state.f.close();! b+ A, O6 C' G S8 H
- }
4 P5 U- [% i" ~! U/ F - 2 ?7 y! h8 q( ]) m' R# x& |
- function setComp(g, value) {
' |! u& _: {) ?, B - g.setComposite(AlphaComposite.SrcOver.derive(value));
& B5 z" l8 H' ^ - }
复制代码 & [: h! d! z; \) M9 ?' `0 `, 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), A: j2 Z& D/ m4 i0 F% B! K3 @
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