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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。6 @0 R+ l U( z
- importPackage (java.lang);$ T7 l, U7 j) [1 q. f7 ~
- importPackage (java.awt);
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" j+ {' d+ d% L; g) M. l( R7 m- include(Resources.id("mtrsteamloco:library/code/face.js"));* P/ x) k; ]% w% L$ q6 l0 C
- $ B7 I( M8 y7 J' \- }8 h
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 `; _. s& L+ ^, [8 N- ]) R
- 8 k6 q H' s7 G
- function getW(str, font) {& m9 S0 u; k9 L; q+ u" R& D
- let frc = Resources.getFontRenderContext();6 L. R/ C0 X0 U5 g
- bounds = font.getStringBounds(str, frc);0 U U+ U" z' Z, X
- return Math.ceil(bounds.getWidth());2 O6 S+ U% U) T
- }% _+ B. F% T, j0 Q% V# N A* U8 V
% R& F' t& b; m% m/ T4 O- da = (g) => {//底图绘制4 U) R e' }# W1 r0 Z
- g.setColor(Color.BLACK);1 V2 b) t0 h, L% [+ w7 z. A
- g.fillRect(0, 0, 400, 400);
. m/ r) w: {, z& c! V+ c+ } - }
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6 }8 P% B" D* d% @7 l, J- db = (g) => {//上层绘制
# Y- X ?5 G, H% U3 T# `4 E! ? - g.setColor(Color.WHITE);3 p4 V5 }+ I/ u2 y
- g.fillRect(0, 0, 400, 400);
. U" s0 U& r! i. o% W, _+ z! z$ H - g.setColor(Color.RED);( s9 F/ @+ U% p8 w$ ?* n3 p* I
- g.setFont(font0);8 I. B6 E& d8 `! t4 K c( {7 g5 y
- let str = "晴纱是男娘";
+ |8 k7 e* M! U% I: K0 H( s; n - let ww = 400;
( I8 `$ j; Y. D% F+ G( j0 { - let w = getW(str, font0);
, i. y8 J: n9 e - g.drawString(str, ww / 2 - w / 2, 200);/ z+ L/ D$ a0 k0 a) a
- }
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" b5 R$ [( h1 u, ]0 V- const mat = new Matrices();
, c, A4 Q* m$ z! W - mat.translate(0, 0.5, 0);
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2 k# [" i! N9 |- function create(ctx, state, entity) {9 i9 h9 n( M: m
- let info = {
3 \9 B; \; j; [- M - ctx: ctx,) y7 X/ p5 t3 M: m% g- L$ m' ]& q
- isTrain: false,
% o( H+ v4 O: ~2 ? q. X; F7 C - matrices: [mat], O/ W2 k/ u: Q
- texture: [400, 400],
% J8 ^! h5 ?) I$ H2 ^3 G - model: {: h" r2 o5 ^/ f4 W* d# O
- renderType: "light",3 J3 U7 S# G# k" s4 S+ b
- size: [1, 1],
/ X$ j/ l2 _* ^: M - uvSize: [1, 1]
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- let f = new Face(info);
0 g; P8 {' {: C1 m* V& Q - state.f = f;
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0 b0 k' x# q" a. v+ k% k. f- let t = f.texture;% s. _0 ?7 r8 o9 @& c
- let g = t.graphics;) d' ?9 C$ V8 ]/ T
- state.running = true;& j8 N+ k7 h: e
- let fps = 24;
7 S* F! K; Q' p f z7 Z( g0 x - da(g);//绘制底图
' E6 B( {5 s; t* s - t.upload();% ~5 ^6 V7 @9 Y5 K0 J
- let k = 0;
% \# w8 t8 b) Q' S- W# @ - let ti = Date.now();: S: d2 G3 Q: H, x, J
- let rt = 0;6 f: J2 C- t- a6 m4 z
- smooth = (k, v) => {// 平滑变化9 x: u* P2 H! i9 K
- if (v > k) return k;
- Z: T ~4 h5 u+ N. r6 R1 U - if (k < 0) return 0;
/ ~; I& O r) [+ ^# ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ P/ t( y( i6 e5 m
- }
$ y% H8 I' B8 n+ n - run = () => {// 新线程- M" i' h6 `' r. X, f' `: A1 Y
- let id = Thread.currentThread().getId();
+ ~& m; U0 m q5 B - print("Thread start:" + id);
1 L' X4 A: ^. B/ Z$ n - while (state.running) {- Z* `5 K+ O5 E5 M
- try {
# \7 {$ g( v: @. k4 `/ V - k += (Date.now() - ti) / 1000 * 0.2;
( a) K. }) _$ z - ti = Date.now();
( k+ U0 }( r3 T+ i) @ - if (k > 1.5) {4 I) { Q. S! l5 E* e# W% g
- k = 0;
$ [! _4 O& t# m, f7 K$ m$ A. k7 F* Z+ P - }
' a. P+ [- U5 y- X - setComp(g, 1);+ l. L: f( d9 I" g g
- da(g);
1 R! @: j/ u; I. y4 h9 x U! r - let kk = smooth(1, k);//平滑切换透明度
" e8 X' O+ t7 K8 y1 c - setComp(g, kk);7 }9 d a6 v- d: a. n' E1 ~4 B
- db(g);1 L1 @( p' T/ ^+ I
- t.upload();9 P' v" d F0 W4 }9 T
- ctx.setDebugInfo("rt" ,Date.now() - ti);, h" B3 g0 K/ ?- v5 b y! |
- ctx.setDebugInfo("k", k);
9 B7 Q. `9 s: H% H) s - ctx.setDebugInfo("sm", kk);0 l) Y; u- \# }1 T5 ~
- rt = Date.now() - ti;
5 n- A9 f# Y* V; o - Thread.sleep(ck(rt - 1000 / fps));
% }2 M5 [9 G- R - ctx.setDebugInfo("error", 0)
# O( }7 V: H7 J" O2 B* ~' T" O - } catch (e) {
! T/ k+ J, N- w* W7 W; q - ctx.setDebugInfo("error", e); V/ Z# ~& b. ]% ]) u' A. V2 ~
- }9 j C5 v9 K( R
- }
+ w: ]1 W8 g# a" Z8 K' U o7 s - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");( V! h0 j( p R* n1 g
- th.start();" h7 {0 L, P0 [, ~) o) S4 H6 h
- }
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. I; }# J( L9 ]4 ?3 _- function render(ctx, state, entity) {
6 |# j; b6 ?! _! m, o! z - state.f.tick();) i+ Z/ J8 ^- |( U; C( v
- }
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- function dispose(ctx, state, entity) {
) x, |& c8 g* W5 C5 b5 H7 ~ - print("Dispose");7 \8 z! @- S. c
- state.running = false;) B" L# v" Q9 `: K0 S" p2 p
- state.f.close();
* k) `+ D A8 ?2 y; o& l - }
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- function setComp(g, value) {# S* G) a) L' y/ e8 e8 ~0 p' |
- g.setComposite(AlphaComposite.SrcOver.derive(value));, w/ c0 Q6 {% K( o
- }
复制代码 6 n/ d+ J! f2 w+ z5 Y
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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* e; M' G. G/ @( N: d2 u2 R+ v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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