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6 A" y" D5 a% ]- l) ?4 X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。: d M9 x8 t2 _
- importPackage (java.lang);
9 _1 G+ a3 T# c% p. v - importPackage (java.awt);
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9 i3 M# j' V, u8 M- include(Resources.id("mtrsteamloco:library/code/face.js"));1 i7 O, \' O K1 a- ~6 P& a
1 W: [4 U2 I& K5 q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: I2 t5 X: O3 U4 q! ^& q9 G
& z& ^7 _+ V. q* b3 }, s7 r- function getW(str, font) {3 h2 ^1 S( A& }- K+ e6 j
- let frc = Resources.getFontRenderContext();
" b. f2 p: a1 \- X: J* R - bounds = font.getStringBounds(str, frc);, F% K4 {$ Q# g5 M
- return Math.ceil(bounds.getWidth()); d- Y8 f! u, g3 b" ^
- }
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G: [8 h" ^ \! {( U2 H$ M, ?- da = (g) => {//底图绘制( Y7 f5 T" p- d2 w) B
- g.setColor(Color.BLACK);
4 ^1 o( u" Y# M4 v& B - g.fillRect(0, 0, 400, 400);/ u" A4 J5 q/ J& P- Y
- }' V. O$ J ?; x
- & E8 ~* g& ]7 c6 \* d
- db = (g) => {//上层绘制 i, n. s; R k$ q0 g4 g- d1 r5 l
- g.setColor(Color.WHITE);( b% y8 g, Q2 Z# Q S: M$ f' Q
- g.fillRect(0, 0, 400, 400);5 v4 j# E5 Y9 H3 `; P/ I2 H
- g.setColor(Color.RED);) Q* m" ]; Y9 V n1 u" B
- g.setFont(font0);2 w; z: A: k4 @3 o( L& c) t3 b
- let str = "晴纱是男娘";6 ?2 @9 h% X2 _2 [, u# P
- let ww = 400;: i* c' ^$ {. V& D/ L m; I' M
- let w = getW(str, font0);
$ B3 j( `7 \7 W0 j* m% { - g.drawString(str, ww / 2 - w / 2, 200);4 }- r9 ^. Z [; m2 }1 @2 [
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- $ I. c9 _6 @) J0 U+ E( F) Y
- const mat = new Matrices();* ^2 W# X8 P- i, N& o2 I$ n/ u. g
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {8 Q7 s' C+ T3 v) o
- let info = {
7 {3 V9 D( Q2 i v4 W# v% N - ctx: ctx,
5 Y9 X' L2 X' c; u& ^ - isTrain: false,
+ O8 ?* U+ z% S - matrices: [mat],
$ h* k+ Z( x- g5 Z - texture: [400, 400],, L# k) o5 \% ], m% P5 c( ]
- model: {" ^# S4 [# l+ b9 D6 m: f$ @' F1 i+ }
- renderType: "light",
5 c- \9 k3 X8 M( }7 B - size: [1, 1],
8 M) l4 A% R8 A3 G. x. y - uvSize: [1, 1]
: `# z" Y6 w8 d% G! v2 a - }
4 J: }( @# E n- x - }
1 O' h6 @! h9 [7 t3 @ - let f = new Face(info);0 p. ^, ?! }4 c5 }% J
- state.f = f;1 Q% D0 t' m/ K% S6 M& k
9 M/ \( b" G' {& ^: g+ U- let t = f.texture;* f& I" {5 l9 z# [6 A; a' o
- let g = t.graphics;0 ?! r; X" a% p4 _( |
- state.running = true;. {# z; i' f3 N
- let fps = 24;
/ M' E3 D1 ]9 y6 E, G - da(g);//绘制底图0 \8 [" p; Q/ c- s0 C5 J' d
- t.upload();
( H4 m$ O& t# j1 t' I2 J2 C4 r" ^ - let k = 0;
$ ^' ^+ L' |# G - let ti = Date.now();! P% U! |$ @1 `
- let rt = 0;/ X2 \, `/ X, w2 z, v2 y
- smooth = (k, v) => {// 平滑变化. L& V! [: X# p
- if (v > k) return k;
, t2 v# x! T: B - if (k < 0) return 0;4 b& o# p1 R: p, g8 A/ }9 B" N
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ d: i$ k8 ^) Z4 T% D# C; V - }# u% [6 [* B# u
- run = () => {// 新线程
' Y9 K& u% m6 P( V/ V - let id = Thread.currentThread().getId();
$ t! |) f D3 f - print("Thread start:" + id);) S+ _) d" u d9 ]& _
- while (state.running) {
8 `0 h0 y( N& x# W0 k8 a4 ^ @ - try {
# Y- e" o( x7 P9 | - k += (Date.now() - ti) / 1000 * 0.2;5 j Z. S5 J' I! b* l
- ti = Date.now();
/ |( v8 {- N' E7 g( Y6 P - if (k > 1.5) {2 o7 \& {0 e3 y# I8 L
- k = 0;
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- setComp(g, 1);* S) T1 B6 M8 ~: {/ g6 P
- da(g);9 @/ {3 R' r3 e" l% B
- let kk = smooth(1, k);//平滑切换透明度
2 H" S, l: D; T' ~) _. M - setComp(g, kk);- Y7 x% W- }/ j, y% q, V
- db(g);& C3 [9 Y" v" b: @
- t.upload();
: L" F8 m4 y! O7 `+ { - ctx.setDebugInfo("rt" ,Date.now() - ti);
1 h& f5 y9 J# F* w - ctx.setDebugInfo("k", k);# K6 Y L) n6 u
- ctx.setDebugInfo("sm", kk);3 q. @6 W1 E) a
- rt = Date.now() - ti;
' A5 A& g# R$ R7 {( z - Thread.sleep(ck(rt - 1000 / fps));
; L% L% ]- m" X0 I# [ - ctx.setDebugInfo("error", 0)
4 M3 G; b% z" V6 ]. j - } catch (e) {* \- P" g9 w7 ?8 O
- ctx.setDebugInfo("error", e);
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- print("Thread end:" + id);
1 w8 `4 j! a2 Y7 ^3 @ - }
: o3 F9 N K$ R - let th = new Thread(run, "qiehuan");, _% I0 ?. F9 I* u: n
- th.start();+ t$ }0 D. e1 r) Y: d1 }
- }* O) w% a: y( L# p
- ) z* i' @+ Q- X6 i r
- function render(ctx, state, entity) {
8 Q- s7 }1 P4 D, ?, ?5 p J - state.f.tick();
7 a- l1 F% T/ J: s V$ i, i - }
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- function dispose(ctx, state, entity) {
: H; q1 B3 {% { - print("Dispose");
3 g) O4 [0 Q0 F$ r - state.running = false;# Y( B# S6 z% x, X% R4 v: Z
- state.f.close();
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, B6 K& c- }# e& J: w. s0 W! {+ C- function setComp(g, value) {
8 L5 C- l8 U1 P$ y - g.setComposite(AlphaComposite.SrcOver.derive(value));* b! r4 j& F' d* t
- }
复制代码
& u: C2 s4 `' m- k: S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。
3 H) {5 ]; j1 I5 X) s# O# i8 a7 J8 y# c' G( w7 C
8 {' G) E8 a' T/ U/ N7 U! O6 p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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