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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。: a# _: o3 @' d7 S; V, T8 w: d
- importPackage (java.lang);
3 A5 ~0 b, Y1 y+ p% {+ ~ - importPackage (java.awt);5 ?4 S7 w1 X, I2 \
( N: K& Y4 x! Q& M% w- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- D7 N1 w- W2 E' d5 V- function getW(str, font) {& L) r P! @) h7 b; m
- let frc = Resources.getFontRenderContext();
5 Z9 t- G2 o' v+ \& u( \ - bounds = font.getStringBounds(str, frc);
/ ^; s2 ^" u7 b5 v - return Math.ceil(bounds.getWidth());
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8 L2 c2 ^* K! Q& q- da = (g) => {//底图绘制2 c& B* i& M. m8 \. C+ I
- g.setColor(Color.BLACK);# m, l# \) x4 J9 W' [! N* W
- g.fillRect(0, 0, 400, 400);
3 T+ J0 r4 \$ ]5 w( G - }
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( a7 b" a/ i7 j, X/ s- db = (g) => {//上层绘制
. X( _- x* K1 m) j7 c - g.setColor(Color.WHITE);
# g( q$ N' K& k - g.fillRect(0, 0, 400, 400);
9 s% v1 t. D6 F, d! M# N - g.setColor(Color.RED);
1 k& V/ M1 h v- z+ l- b - g.setFont(font0);
0 \. [1 @: n5 M - let str = "晴纱是男娘";
9 _9 L) s, ]0 Y3 Q4 R - let ww = 400;0 @* m8 R ~3 A! r, _
- let w = getW(str, font0);) S& q6 i+ H) }4 E* U
- g.drawString(str, ww / 2 - w / 2, 200);0 Y& \/ ^0 @% D/ V" O# c( a8 `
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- const mat = new Matrices();" Q- R y2 y; w1 _8 c
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {/ M2 P$ l; H- A3 R; [; L
- let info = {
) l, Z: h3 i @2 K, R; g - ctx: ctx,5 P" A: H! D) L5 [* I
- isTrain: false,
8 K0 d# a h. v: ~1 E6 N - matrices: [mat],
/ s5 h5 u% i) i7 M( i - texture: [400, 400],
: ]% v. Z+ _( Z3 A - model: {
+ Y! w4 ^( l; ` - renderType: "light",
3 R8 ]' q% f; A8 y* N& w# X' E - size: [1, 1],* a4 a$ v/ k; Y, c) g
- uvSize: [1, 1]8 q. x2 |6 I2 b5 _# u- F) s1 l* ^
- }* [5 C! |+ z1 t, D
- }# S$ s* S$ X7 L7 Q: T& c
- let f = new Face(info);4 f1 a- v% Z! F8 v9 G* n
- state.f = f;- {$ }. b; q* X) c& O" E
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- let t = f.texture;
( Y5 ^# a% B1 u$ e7 o e - let g = t.graphics;- w, {& x) ?' I
- state.running = true;) k. q. M4 K9 S1 y
- let fps = 24;) B( B1 u- e6 v- ~
- da(g);//绘制底图1 j8 D1 u; t+ _
- t.upload();6 h* A" f2 w' O
- let k = 0;: J# t2 w" R d0 T% W6 X
- let ti = Date.now();+ \% j! j9 z+ L H* k
- let rt = 0;8 l8 `9 [% S- v* R- C% ?- O
- smooth = (k, v) => {// 平滑变化
2 `! h& i& s2 J8 E2 Z - if (v > k) return k;3 [) h8 _9 J0 K0 W! O5 R" x# q
- if (k < 0) return 0;
% s8 W; i ^! P - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( v; Y! U4 M( t' [. }* c' H
- }, e4 I$ w$ e4 S* P+ I
- run = () => {// 新线程
: d* S+ K' [, ] - let id = Thread.currentThread().getId();! E$ m( }) a( I- B) A
- print("Thread start:" + id);
& Q0 x0 r7 ~6 z) t: s; J" R7 h - while (state.running) {
- q- Z& j- E I' M - try {. G( U0 ?; e- P
- k += (Date.now() - ti) / 1000 * 0.2;1 A H2 M# a% T* s
- ti = Date.now();
" R6 V8 g; `- d E - if (k > 1.5) {$ b+ J& W+ K# q+ T l- ]
- k = 0;8 Y& K& B4 A* d6 Z
- }
: g" h" x* u5 i* l - setComp(g, 1);
" B0 Y" J- ]# x: I. c' |- u - da(g);1 X H! P6 @6 T0 Q1 I) Q m- }
- let kk = smooth(1, k);//平滑切换透明度
. F/ F$ Z8 |2 y- j7 }; Q3 a) U - setComp(g, kk);
1 n, Y7 n$ C& `9 W# v0 g - db(g);2 h4 \4 h( E& a
- t.upload();& [; R# e- a4 r9 K# q+ Z/ K' D
- ctx.setDebugInfo("rt" ,Date.now() - ti);8 P% _- s' |# C1 w! G
- ctx.setDebugInfo("k", k);
0 A0 G& w0 F/ }+ I2 X - ctx.setDebugInfo("sm", kk);0 q# K% _" ~5 K
- rt = Date.now() - ti;6 n, A9 K$ W0 Z
- Thread.sleep(ck(rt - 1000 / fps));
8 @+ q0 c4 y6 N3 y4 n" w# T4 t, K - ctx.setDebugInfo("error", 0)
6 V# N2 O( C7 t$ A - } catch (e) {
; T* Z, q1 }& `4 p - ctx.setDebugInfo("error", e);5 A. B, a% V- b B y
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");2 u T( _. b7 {$ y/ P
- th.start();
4 M7 `6 m- K9 q4 P - }
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' G7 k) k5 I3 d4 _- function render(ctx, state, entity) {5 E+ C- ]* M" T) P' S/ o$ ?: K# y5 {8 c
- state.f.tick();
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- function dispose(ctx, state, entity) {6 m6 x' {. [$ r, l; l" N
- print("Dispose");
. B2 `0 M( f4 K" ~* F2 w - state.running = false;
% [7 Y6 u- j y* W) o - state.f.close();4 U4 ^3 G3 j4 w( _3 g0 _4 s: q
- }
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- function setComp(g, value) {" M% s! P9 i& y% s! |7 |9 Q
- g.setComposite(AlphaComposite.SrcOver.derive(value)); f7 H, z; D7 L- | s2 o' x
- }
复制代码 ) L7 z1 j7 a0 A) d* k& Q% N
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。: S. T H% `/ h; X5 X* ]$ G2 D
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! x5 }& |- X7 S+ u: t) h; L( w顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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