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* a+ k& p* N9 N% ]" O S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。
* y% \9 ~8 Y* V3 a- importPackage (java.lang);: S% p# S. M$ Y
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# t; F7 }4 M1 L% O8 F! U- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
7 X: C" n8 O5 }0 B! R3 l - let frc = Resources.getFontRenderContext();
1 _2 j5 @, Y D9 ^4 l- x8 z( D4 j - bounds = font.getStringBounds(str, frc);+ @" _, s u/ q# F# Y
- return Math.ceil(bounds.getWidth());; e4 ~# J. D" b
- }) v6 s$ {. g+ ~6 G4 H- M3 @
- ( C4 m8 J; f o% ]+ f
- da = (g) => {//底图绘制
, N! ?0 ]6 E. b" I7 p, K - g.setColor(Color.BLACK);& e" P+ U$ E5 Q8 Q
- g.fillRect(0, 0, 400, 400);
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- , S1 _- X* r; b
- db = (g) => {//上层绘制
) t9 C h- h s3 d } - g.setColor(Color.WHITE);
7 ^: ?/ K3 `# q3 X) v1 S - g.fillRect(0, 0, 400, 400);
% U' _/ @: R# Q) A - g.setColor(Color.RED);
& u2 F3 \; R, C8 F - g.setFont(font0);2 {8 t& j9 f& o \( p
- let str = "晴纱是男娘";
9 y# \: a3 x, G: ^8 Z" }2 g - let ww = 400;+ {0 |6 V9 l* ]& l5 A
- let w = getW(str, font0);
7 }$ z5 c( I* h" Z# @2 f - g.drawString(str, ww / 2 - w / 2, 200);
2 _$ j0 e; p* i: R - }
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- const mat = new Matrices();
4 n4 y; W/ H, ?) x - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {' Z! }& ^* a1 H5 g. N Z5 f
- let info = {
1 y& {/ C+ a+ l5 e, i$ L) E; J - ctx: ctx,
9 m3 D" y# ?8 s1 P- F: @# L, C - isTrain: false,6 L( s$ S( v! E& W2 t Y
- matrices: [mat],0 T' J4 o2 @' v3 D6 j/ y
- texture: [400, 400],4 G6 Z: q! J1 U4 g/ m) c' p
- model: {" X( E! B+ y$ z
- renderType: "light",, M. V2 y& z7 d/ U( v' I, d5 F$ w' m" T- b
- size: [1, 1],
3 } x; b% c% z! H$ m0 }( s - uvSize: [1, 1]
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- }0 u9 \8 A' ~# v2 U7 a' @9 S
- let f = new Face(info);
" ~+ _7 `$ |4 T3 D5 \7 S - state.f = f;% R# N6 t, F! P1 J7 w) Q
/ x8 ?" ^0 P+ [) k- let t = f.texture;/ B, X5 c# D% H7 T, u, x" x3 G, h6 e
- let g = t.graphics;
. I, m- F# o2 _7 \( d - state.running = true;
, b2 p$ p6 \" C" l - let fps = 24;
" E8 k8 v# D# v, D t4 f$ g+ B5 v - da(g);//绘制底图
8 c6 ?3 \$ i; x' {9 q- | w - t.upload();
7 E3 i5 ?/ j+ X6 J. [) f' G+ H8 C5 V$ p - let k = 0;
. G- G$ i1 n+ S8 h4 s - let ti = Date.now();' v i E% L3 P6 e
- let rt = 0;) U, l; Y7 T/ K+ p G) i2 R
- smooth = (k, v) => {// 平滑变化# m+ { E: d1 F; M0 _7 d3 Q
- if (v > k) return k;
! _; M* U. A, Y8 y0 p" y - if (k < 0) return 0;$ [6 z9 C6 u7 l! z. l
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
7 u1 K! [5 X- |8 r& S6 S - let id = Thread.currentThread().getId();
$ Z2 i( n9 U) K, V% W: c p - print("Thread start:" + id);
' Z1 i7 {7 S7 {1 C9 T - while (state.running) {
/ K+ E# l7 W, _5 `2 | - try {
) Y! i3 {. s3 w& F2 n9 u& m* E! b - k += (Date.now() - ti) / 1000 * 0.2; a$ H6 }/ _9 y) F' F
- ti = Date.now();
0 g* k0 Y- G# d) t& @) a7 M, a9 x - if (k > 1.5) {5 V3 t* i# b) M# x9 g- u
- k = 0;5 X7 X: C1 e. T* @. f5 m
- }, C- A6 w* @" p0 j/ q8 P
- setComp(g, 1);8 ]# t9 |' H$ ^8 i4 L6 r
- da(g);
7 t, i w( p$ `' ^6 j$ I& S - let kk = smooth(1, k);//平滑切换透明度
! m: j, \" o- \& B9 `2 e) [ - setComp(g, kk);5 m# q$ ]3 O. a% Q; I' U
- db(g);0 h0 Q9 [. @9 N8 k: t: K9 ]
- t.upload();& z- o+ j8 L2 O2 \' W" n* J
- ctx.setDebugInfo("rt" ,Date.now() - ti);- W; l& ~, B) ?) ^6 ?; S
- ctx.setDebugInfo("k", k);
4 v c1 u+ T; G3 r) B4 [$ c - ctx.setDebugInfo("sm", kk);
V3 Q1 g( @# L3 Y- c5 n1 J - rt = Date.now() - ti;
9 q& U! U' T4 c5 E+ l" R - Thread.sleep(ck(rt - 1000 / fps));8 R. G: J. ^& v# s- f5 p1 ^: p8 l& c4 Y
- ctx.setDebugInfo("error", 0)5 G) O& Q C" s1 ~. g, p
- } catch (e) {1 Y& n, g/ @( G
- ctx.setDebugInfo("error", e);
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- }
0 W; L' N: [! Z8 T6 o7 e1 U( e - print("Thread end:" + id); f, a6 X# u6 r2 j$ s7 d" A4 M
- }
; b, N% `- Q; T0 Q - let th = new Thread(run, "qiehuan");
; @2 X4 i5 s- W - th.start();- }7 e# O1 U U
- }
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- function render(ctx, state, entity) {2 U8 D* Y( @* ]3 L
- state.f.tick();
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6 H9 K z0 v. F. C- function dispose(ctx, state, entity) {
( c: I" r* l3 ~. ~& |- U& x - print("Dispose");* g) @( K5 r. W* K6 E$ M
- state.running = false;
0 q& v0 k; k i0 y, ^" h9 t( C - state.f.close();( y, r# Y6 B, } M, S; X) H, [
- }
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+ g; g4 M) P$ j9 M. T8 X, H2 u: G4 A- function setComp(g, value) {
+ @: v) a! @8 k. p+ v4 y1 u" H - g.setComposite(AlphaComposite.SrcOver.derive(value));0 ~) [ r8 Y# X# Y& ]
- }
复制代码 6 \& o' `6 d Y; @+ k" X# N1 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。$ w0 M: M8 y0 F8 O$ b
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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)+ L+ n# K$ d" f: {
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