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# j7 E& D; N( @7 S7 y! d6 ]( o. `( L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。, B) H! K' f6 k! a/ s
- importPackage (java.lang);
. G( ] F5 g o% Z* y. c' {4 T - importPackage (java.awt);
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2 t6 K; Q7 N0 _7 Z1 a' t- ]5 k( C; `- include(Resources.id("mtrsteamloco:library/code/face.js"));/ E" H1 H- d5 k4 Y/ v
- ) n/ K' Y% u/ Q$ ~1 [( F
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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8 o; j) {) r3 n3 z- ]- function getW(str, font) {
$ R$ o! D8 u: m8 w4 J0 F5 t) {# w6 t - let frc = Resources.getFontRenderContext();
4 A4 c6 o1 e+ W9 U- k1 ~/ w, } - bounds = font.getStringBounds(str, frc);
8 r$ h7 n- X% t - return Math.ceil(bounds.getWidth());
& Y# k5 K* y+ C7 P" Z - }
1 {* _$ Z" }$ h% r1 A8 Z8 d - * F& y* ]9 `6 f* a3 m( c) O
- da = (g) => {//底图绘制- } ?$ C6 X% \" ^6 G4 m- F q+ F6 n
- g.setColor(Color.BLACK);0 X! B6 n3 c5 z" i1 O, C. W0 ~
- g.fillRect(0, 0, 400, 400);
5 q, X$ O7 \9 O: m: q( | - }
6 X$ s _: u! S- h
* a7 L5 l/ L0 o! {9 b1 e! t& f- db = (g) => {//上层绘制* p: j" s3 x6 k
- g.setColor(Color.WHITE);
- V5 R$ P, E" f" {! a - g.fillRect(0, 0, 400, 400);
% O* Q& I* a" {1 w: } - g.setColor(Color.RED);
% P7 i5 B: e' P0 D/ J - g.setFont(font0);# A% m9 J7 M( p& D3 u
- let str = "晴纱是男娘";
0 W* Z2 }) r7 w% p8 m - let ww = 400;
* e' ~# L# g7 h% E2 ? - let w = getW(str, font0);
# O. `" l. ~* @. U. {# C, h. ~/ _ - g.drawString(str, ww / 2 - w / 2, 200);4 Z, t5 v8 r3 h; n; ]% U p( F$ Z
- }9 Z6 L* ] ]2 e0 r4 C5 B/ E
- % ~9 Z0 D; o+ J4 K- |) P( a) {) {
- const mat = new Matrices();
V3 u4 S9 B& s - mat.translate(0, 0.5, 0);: W# Y* Y0 S( s2 n* ]1 K
- / K5 m9 q, Y' ]1 w! _# Z
- function create(ctx, state, entity) {
$ {! ^, ~9 V6 L - let info = {5 P% B/ K7 ^: R S. ~
- ctx: ctx,
6 [" k0 z0 J; | - isTrain: false,3 {9 v% [5 N: D2 _
- matrices: [mat],. d) H8 j8 z c
- texture: [400, 400],( e# j$ w; ^$ }! x& Q% v9 S
- model: {
! O1 [0 b! f# ^: o; a) Y% e% ^ - renderType: "light",; T0 O5 q) ?1 b2 E4 d, f- D; @, l
- size: [1, 1],9 x4 m& q; ]! x
- uvSize: [1, 1]
3 [0 \" B8 V5 q7 E; G% }" K4 p - }* p0 X2 K, f- c2 j
- }
9 I/ R. E9 O* g" n6 E - let f = new Face(info);
8 A! ]& P6 a l5 @' w$ K - state.f = f;& k. T7 k) i1 h1 U1 _8 S
- ; F. E o# |1 {9 I9 L% N" t
- let t = f.texture;
! \2 I ^" a# Z% ^# ]' q - let g = t.graphics;
% R! M2 X# s. d, ^$ t - state.running = true;
( b+ p7 v2 K7 ]" J- W2 _# G - let fps = 24;* _( l( t/ x* }, N. p: M% m
- da(g);//绘制底图6 r. c$ C# e: h; Y
- t.upload();2 a# P8 A% P! ~. I: W k# `/ k
- let k = 0;
7 I) ^ ]5 f* i% ?. f. ^- N' j - let ti = Date.now();
* s2 S/ t2 W7 y- t9 h - let rt = 0;
3 i7 I! g l- y5 V, Y - smooth = (k, v) => {// 平滑变化- I+ @7 O/ [/ { y: q
- if (v > k) return k;
# k" D4 ?! \2 G; y) {+ g7 x7 V3 u - if (k < 0) return 0;" f$ s5 U# S% b3 L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* ^4 U' O$ p+ @* S - }
0 W; W7 G; @4 [) d: p+ f! B+ I, p! g - run = () => {// 新线程
4 r# n; W* p& L* f+ x& c$ a( T - let id = Thread.currentThread().getId();9 q% H& ^* Q+ R# U0 U& T
- print("Thread start:" + id);
7 r6 R, G! k! ?, X j - while (state.running) {
7 i# h6 f! v1 L L% c2 w3 ^, C - try {' @* \' B5 M2 @
- k += (Date.now() - ti) / 1000 * 0.2;8 g4 I$ Y- }+ s& V8 P) ]) ^
- ti = Date.now();
* n; t, Z) n3 q/ C - if (k > 1.5) {
! q5 ^4 M" N5 F0 S- ] k - k = 0;* n5 L6 E/ \6 G2 a3 N8 B) Y& [
- }
' r% P$ M; t+ u$ h1 r, b8 D( e8 X - setComp(g, 1);
4 w; F+ k: z: i$ }: r: ^ - da(g);
. M( K/ ?6 e0 A6 L' T) ^ - let kk = smooth(1, k);//平滑切换透明度0 K* [' f' @ a& \
- setComp(g, kk);
! K' h4 G; x2 r0 G% u7 w' z - db(g);
6 Y) q! ~7 f, \7 V, y8 G- ~ - t.upload();1 v& H$ g* v* c1 o4 z2 h
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! |1 Z: Q$ B& ?+ K. z$ t - ctx.setDebugInfo("k", k);7 W& h1 a# d. i4 P# s$ J2 K) x) O
- ctx.setDebugInfo("sm", kk);
( b8 I1 f( q1 t9 @5 d7 q - rt = Date.now() - ti;5 B- b8 p- V8 n4 H1 W
- Thread.sleep(ck(rt - 1000 / fps));
/ @( { D$ t/ u6 U; `9 w Q - ctx.setDebugInfo("error", 0)
8 c5 ~5 A+ o: m9 \6 h - } catch (e) {# x5 M9 k% H/ [0 }# D. d
- ctx.setDebugInfo("error", e);! k, O5 T p. c% b# V" t
- }
* [: n) D$ E& c' D - } j. v" W* ~. T# E3 I& t# @# f1 g! Z
- print("Thread end:" + id);
; L1 ~/ M7 h, g3 ?6 t" ~ - }/ h% L. g2 S1 K- I
- let th = new Thread(run, "qiehuan");7 m7 T8 U0 Z" b+ b' l6 m
- th.start();' p O3 M+ j. r2 _6 C; _% \
- }
+ U6 M, n! y# c+ M- ^" [ - # [% \# L& z; x% h
- function render(ctx, state, entity) {2 r2 b5 [- c8 g2 S' [0 V
- state.f.tick();
2 d" X2 {+ ^" e- H - }
3 I+ w8 R { k" M - . x- }3 u% x4 f( s
- function dispose(ctx, state, entity) {. z' r* y: a7 Q
- print("Dispose");
7 A0 r& Z, e6 n/ L7 g* l8 p - state.running = false;! ^, D4 N8 Z4 x0 U/ n! R7 D
- state.f.close();1 O% `) N9 J/ Z5 Z" e
- }
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* N" \" O* B* N! n/ h6 f2 k( o- function setComp(g, value) {% P! F' A- [# n! U5 C$ j H
- g.setComposite(AlphaComposite.SrcOver.derive(value));2 P& b2 U, R9 f4 Z
- }
复制代码
1 Q: V7 i5 h C* @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)! j3 X5 Q3 f" C1 o
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