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' |# T2 K; }' a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。
3 v5 {$ F; x/ b: B* ^1 c- importPackage (java.lang);7 L" x' s. A8 E: G$ S
- importPackage (java.awt);: p6 _- M W/ Z+ P! s; u4 T
- 1 x8 o; ~" i4 K: l c# r
- include(Resources.id("mtrsteamloco:library/code/face.js"));8 h4 Z$ a3 K$ R% C4 R2 V* _
- 9 a: N ` P/ ^. W2 ?# e% G1 J; d4 W
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
n2 Q, r# f) e9 c& C, B8 y) O - let frc = Resources.getFontRenderContext();
# {3 V% u7 w6 @2 z3 S - bounds = font.getStringBounds(str, frc);
: X1 }& F$ W2 @/ R4 {* n+ c5 S - return Math.ceil(bounds.getWidth());
. f. s' j' q5 X - }& K$ U1 s5 z4 f+ h1 A& S$ Y
4 G5 z! y$ X! K$ e F- da = (g) => {//底图绘制
+ _3 K9 U ^8 P! ]0 n - g.setColor(Color.BLACK);) w7 d; _2 I q& d
- g.fillRect(0, 0, 400, 400);* Z1 t7 h" i4 H! k7 @
- }
) b0 I' v5 ~5 f* G- \ - 3 I* e! e" G9 c; H
- db = (g) => {//上层绘制6 j5 \6 \" y4 `, [
- g.setColor(Color.WHITE);2 s& B% V. _$ Z( [) D2 w
- g.fillRect(0, 0, 400, 400);
$ a0 ]9 v2 Z8 D+ B5 c - g.setColor(Color.RED);9 v) _. F3 E9 j/ e+ K
- g.setFont(font0);; o, D% f$ l8 I8 c7 ~) [. f
- let str = "晴纱是男娘";
' K/ J7 Q5 a! P Z/ d5 L - let ww = 400;
( z1 C1 L9 j8 T( u, V - let w = getW(str, font0);9 _" E9 q& x- R% `) }# D# N
- g.drawString(str, ww / 2 - w / 2, 200);
) ^+ ?0 R6 q# {6 ~4 ]4 R - }0 \+ Y* N8 C0 P8 u4 e: k3 ]
- # d3 L+ E9 j6 g9 `% j
- const mat = new Matrices();
, K% a& Z9 o1 ^+ R$ Y- b - mat.translate(0, 0.5, 0);4 n! A* k" N3 Z
, N7 `! k* Y1 I6 X3 o- function create(ctx, state, entity) {6 Z; R1 z- x7 i9 }/ U, E! b1 P
- let info = {4 \; m0 c2 `0 N, t. E
- ctx: ctx,! G: M/ z% v* I( U
- isTrain: false,( B6 H1 k+ y9 t# k" H+ ~ x
- matrices: [mat],
$ n" _! W1 U2 F8 g/ a - texture: [400, 400],8 S5 y0 C" i- ?/ V: { G0 G
- model: {* E$ `! J5 m: U. n
- renderType: "light"," Q Y2 P0 T/ A( M3 c
- size: [1, 1],
: M) ?% ?( t1 ?) C" N' S7 w - uvSize: [1, 1]2 D. G/ Z2 l9 G: G
- }* K# [8 V) C: T$ G/ ]
- } `. @$ ^% S: h( n
- let f = new Face(info);+ L3 W& I k; J: K
- state.f = f;# w/ J( X& |7 y h* u5 {- O
/ C+ @7 |5 m4 O- let t = f.texture;
e1 F! X2 _9 f h: E# t. ` - let g = t.graphics;: Z4 v* @( X& X, M' j6 G
- state.running = true;
9 ]; a* k, v+ ]. h - let fps = 24;
0 f+ A+ x4 d) D3 Y& d( ` - da(g);//绘制底图
4 ?- P5 H. T( e# {% V: y - t.upload();1 h _! g3 C( u/ X- K
- let k = 0;
5 s6 P* y- E4 C7 G Q( h. t$ f8 { - let ti = Date.now();
; ?/ Q' K0 _- G3 f- l. J, K - let rt = 0;6 [. m. c8 ]) w" e& Y- ^4 z
- smooth = (k, v) => {// 平滑变化
" A* D" W! H5 t) R9 P0 m - if (v > k) return k;
, B( _2 ~' u+ E, e9 N0 B3 K$ J, P - if (k < 0) return 0;
& P% k- f; y% N' A9 W v5 m, G- O - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; y9 M; ~# u j( t d: {+ c1 n: g! x `
- }) ]1 ^' b, g/ `) Q+ r
- run = () => {// 新线程$ `' c) C% q# ~0 E. C% Y8 r
- let id = Thread.currentThread().getId();
5 I# h# K( x3 P - print("Thread start:" + id);
+ R2 c9 g( t# R: h - while (state.running) {
+ G. B8 I x) y5 t3 z- n" h - try {
% a n. P6 {; ] - k += (Date.now() - ti) / 1000 * 0.2;
/ O5 I- N$ p5 ^0 I, \! S1 S - ti = Date.now();
" Y& V) n; l+ s' K* v8 r8 _ - if (k > 1.5) {/ B; R; u' l# u( @8 ~
- k = 0;
5 O' j3 z" b1 |# Y# Z3 i - }
L$ k- E! s! F1 k4 O - setComp(g, 1);; i9 ]+ Q' Q* O2 w
- da(g);
: g7 i L: {$ [5 x5 c1 Y8 H - let kk = smooth(1, k);//平滑切换透明度
4 o# X5 y: c( H" }; ] - setComp(g, kk);
! N j; S0 n0 H% I) x5 c0 M - db(g); t& Y2 H, b% F- v, _( z
- t.upload();
4 b/ D8 a) W; c# V! J - ctx.setDebugInfo("rt" ,Date.now() - ti);5 w% q* e% ~8 y# x C4 X
- ctx.setDebugInfo("k", k);
' w8 J" w* L' f - ctx.setDebugInfo("sm", kk);
; A" x0 Y8 `2 G0 M! @2 Q - rt = Date.now() - ti;
. g( d. y0 i0 A1 y7 M - Thread.sleep(ck(rt - 1000 / fps));
" m, @! e7 d, t - ctx.setDebugInfo("error", 0)
6 h% j" {; g+ z6 d1 U7 A - } catch (e) {
g. i! k$ c8 k2 n2 N - ctx.setDebugInfo("error", e);% h F1 K8 n( N t
- }+ ]' e% ~8 @2 U+ A7 f
- }
- |' n3 B. S5 K) E$ V8 n5 Y, h - print("Thread end:" + id);# O+ ~, ^7 D# E3 m
- }, }: ^( U" R6 Q- ], p& `: ?# A4 r
- let th = new Thread(run, "qiehuan");" x6 B8 x4 l" q
- th.start();
0 z$ B/ T% s v - }( r4 u6 q9 T* }$ C/ W# t
# B+ L( D" |! Y/ P- v6 ?3 u- function render(ctx, state, entity) {7 \* z/ n% \! @: U* e0 M3 @
- state.f.tick();
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- , o0 v. _8 o u! ]! e# o
- function dispose(ctx, state, entity) {, }' {5 N! w8 V/ N
- print("Dispose");
( e# ?! y8 k- u( b$ G; @ - state.running = false;
2 L- j* W! L& \0 N# ]( x8 Q - state.f.close();3 [/ J* z8 J0 I* B
- }
% ~# `/ @7 z4 Z# U* w# i
0 n% f( R, |2 O0 M9 r- function setComp(g, value) {4 q6 S; ]* u8 _' {
- g.setComposite(AlphaComposite.SrcOver.derive(value));
/ \. u0 v' M! v7 r7 r+ ]) `9 _ - }
复制代码 0 Z. _* b L2 Z5 K8 \( F( J
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)7 z: Q! d; Q) f
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