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' O% J5 A2 v! T1 _2 A; W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 \ H! Z, b9 R$ _- importPackage (java.lang); o/ A( u$ K: f& q- P
- importPackage (java.awt);! d$ D. D$ u' B+ e C* Y
/ q- `9 \& e' P c8 E- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. x: B# n/ m* K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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4 o6 O J: o' i0 p9 J) G- function getW(str, font) {8 b9 m2 W$ U* y2 P' c& r( X
- let frc = Resources.getFontRenderContext();
* U5 ?4 ]; B0 f' ]& ^/ U: ^" ^* W - bounds = font.getStringBounds(str, frc);" q/ }* E7 ?4 d8 V/ V
- return Math.ceil(bounds.getWidth());6 @: C4 L# s# ^
- }
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- da = (g) => {//底图绘制5 X2 X% x2 R: w, S$ y
- g.setColor(Color.BLACK);
# B# `6 m1 X' B4 I3 m - g.fillRect(0, 0, 400, 400);6 R( J2 e0 D, G: D* [* H
- }5 H5 h9 o" @$ w% P u" F% c9 C# @7 B; s
- 3 z7 J f+ [4 Q3 ^
- db = (g) => {//上层绘制
8 m$ h% [7 g6 C, n% W9 V. Q# r - g.setColor(Color.WHITE);
. ^9 A: g; B! _ - g.fillRect(0, 0, 400, 400);
C! q% X# C0 j2 t0 t, `4 Y - g.setColor(Color.RED);7 W- m, O3 x: U" }/ Y( y
- g.setFont(font0);2 Q0 O- d) X. |* L, S1 e" c# C% J# U6 ?
- let str = "晴纱是男娘";
! }' i& M" C' G2 |% I8 h - let ww = 400;) f# {* s- A% t( j4 Y
- let w = getW(str, font0);
/ l* ]7 ^) T& u6 s/ B1 {6 m - g.drawString(str, ww / 2 - w / 2, 200);
8 W2 @1 b* b8 [9 w6 V" p; l - }
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- const mat = new Matrices();7 [# Z( u* M6 a1 i( S# K) \
- mat.translate(0, 0.5, 0);) {8 x- l1 Z) x# I* d- Z
- ! u2 W$ W+ P- m" b; e
- function create(ctx, state, entity) {0 d% d- Z) s( `3 v
- let info = {
4 i' n2 y+ C$ M- C- K$ X - ctx: ctx,
/ ~6 D5 a+ A/ t. {) E0 M8 Y - isTrain: false,
4 Q, q' w& @ c - matrices: [mat],
A6 J1 L+ [: \ f" J8 k - texture: [400, 400],
+ I, p( g3 h0 _) ~ - model: {
) B( E2 K5 D& L9 v3 O5 M - renderType: "light",* \ t' s+ I; O3 E( R! [
- size: [1, 1],0 _# S/ A/ ?' j
- uvSize: [1, 1]* u0 Q2 ]% J" U" P" ~
- }
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- let f = new Face(info);
# B9 ^( l+ B$ X - state.f = f;
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- let t = f.texture;% ~' O) ]# q0 h7 u9 d9 _+ ~
- let g = t.graphics;7 h9 U% u7 M9 T
- state.running = true;8 h. {8 C( h: g& w( ]
- let fps = 24;) p, C) R9 d( e1 [# `. k5 O
- da(g);//绘制底图
$ f. ?* g" A- w" V8 N& [: B - t.upload();
+ {4 N, e. l6 u" D - let k = 0;
7 u7 N7 k, s- g& H1 x2 R' [$ N, a - let ti = Date.now(); f r( ^# [, [* [
- let rt = 0;
2 z, C9 e- T4 V. D* h1 b- l9 s - smooth = (k, v) => {// 平滑变化
$ U! {6 ~9 K6 B - if (v > k) return k;
' x; N( h/ s. E5 f( _4 r+ ] - if (k < 0) return 0;
7 o+ I9 U' c6 G7 t - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" C- @% n/ ?# w! K - }2 D! `% l. I5 k) g1 }
- run = () => {// 新线程
' `7 z; |; v |; U, T0 K5 K7 J - let id = Thread.currentThread().getId();! ]( P1 J j* C% e' \! C' k
- print("Thread start:" + id);* r; ]1 I! {, @4 g4 Y$ y+ P
- while (state.running) {
, |; J U M1 { - try {, G" R) b/ t( p2 a; P' C
- k += (Date.now() - ti) / 1000 * 0.2;
" o% ?$ X% B1 I - ti = Date.now();5 d' Z- V2 d" Y% J9 b" M! P6 m
- if (k > 1.5) {
4 z0 c9 s7 E! z% \8 Z - k = 0;
' `8 p9 Z* Q5 |4 O' L s - }
]. @9 D2 ?0 D( u* Z G - setComp(g, 1);7 H" g8 t& T* m: R5 }' ?
- da(g);
: _) P; V" n0 W. L& K: E - let kk = smooth(1, k);//平滑切换透明度 M3 y8 b, `$ L: h8 N$ g% Y
- setComp(g, kk);8 W2 l# j0 w, u) q: d9 h7 D
- db(g);
5 k+ n% A9 F0 }& b- M - t.upload();
4 n2 f* K) U' P* j% F* F - ctx.setDebugInfo("rt" ,Date.now() - ti);2 [( h4 g2 Z5 M4 ~
- ctx.setDebugInfo("k", k);
9 o% `# B* }1 U1 B0 H2 O$ Q - ctx.setDebugInfo("sm", kk);9 B7 U |$ f' s
- rt = Date.now() - ti;. b. d! \9 L! j
- Thread.sleep(ck(rt - 1000 / fps));2 L( [ J* k' b9 X& s
- ctx.setDebugInfo("error", 0)5 ]8 X6 b/ P9 f
- } catch (e) {
6 Z* ?: F$ U' z4 p1 d) H" c - ctx.setDebugInfo("error", e);
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- }) G& j# t W4 A1 \* [( v; L! ^
- print("Thread end:" + id);! F# D' `: l+ G" @. {: L0 V0 f
- }
! v8 E. P+ C2 d$ d& a9 { - let th = new Thread(run, "qiehuan");
1 ^9 j- ^) x6 c5 y5 v - th.start();
% s! Q B2 K% M7 l) i2 i - }
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# P* N' |& [+ m& i8 R- function render(ctx, state, entity) {8 p8 b* m6 t3 w) R1 f
- state.f.tick();
& U% x/ F: [% H( B$ l - }
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" K5 H. Q6 p- C8 ]- function dispose(ctx, state, entity) {
: H# p v/ b' p5 Z. i - print("Dispose"); j1 g, j7 j7 B" ]* C% I/ q
- state.running = false;
3 g0 _6 A9 M7 K- D: N8 U - state.f.close();- r3 L' Q( Y% f/ Q) p! m8 i
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& U; C# k M4 e4 Q- function setComp(g, value) {
9 l' J' v9 k8 O @( w' T; ?* u; c - g.setComposite(AlphaComposite.SrcOver.derive(value));
' q7 L& J% X) i( r0 l7 y4 |4 q; X) Q - }
复制代码
1 V1 ?$ k7 v7 Y! }# M. L: x1 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。, Y" `, @ m8 x$ |% Y4 J
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( y7 e: B* g+ R& ?" ?/ ?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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