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5 j4 H( s5 f8 v6 W9 m2 K& M) J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。) c( Z' b+ C' a, R
- importPackage (java.lang);8 e& V, Z& X1 r) ] ^9 g
- importPackage (java.awt);- j' W# U9 R& H( Q. d) T
- ! X+ d9 G( e8 r8 ?
- include(Resources.id("mtrsteamloco:library/code/face.js"));
0 X [+ n, D+ j) u
. v% H4 [( u; g3 f7 A6 {- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* Y8 O# T8 F0 X8 ?% ?9 H: @$ X1 I
6 n. g1 d& [& }% [- function getW(str, font) {: u. |9 F- |' J% h5 v2 t5 a
- let frc = Resources.getFontRenderContext();
' [6 B$ }% E7 T f K - bounds = font.getStringBounds(str, frc);
& R! C6 w; _5 T" W - return Math.ceil(bounds.getWidth());
V& E0 r' q5 k( d - }
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- da = (g) => {//底图绘制0 x5 I9 b+ F! `4 V' z: X
- g.setColor(Color.BLACK);0 M4 z u: ^; }- p8 [. E5 S
- g.fillRect(0, 0, 400, 400);
4 }& ^ h, W% P$ U# B - }
! H' O) f$ O, P
1 f* w; i. N2 b* Z+ v$ _2 |- db = (g) => {//上层绘制
1 S5 \0 ~8 z* k' K C+ s* R - g.setColor(Color.WHITE);
2 q5 I6 s; U) A( ~# `8 C - g.fillRect(0, 0, 400, 400);
7 N' U. M, ?5 F! a' \6 I0 B - g.setColor(Color.RED);8 d, o1 q& Z( n2 w; C% e* S
- g.setFont(font0);" D( J; p* M7 W: ]2 e' N
- let str = "晴纱是男娘";. v+ A( |# p8 w" ~, c
- let ww = 400;
5 O- N4 ~8 v$ J - let w = getW(str, font0);/ K% l% ^8 @6 _3 t. R3 `# E
- g.drawString(str, ww / 2 - w / 2, 200);
6 k \, k+ N1 n - }; x4 Z# {9 B! [
- ; B/ g" _) {( R3 T4 J5 [
- const mat = new Matrices();, |' D+ c0 V8 v1 Q
- mat.translate(0, 0.5, 0);$ M' y' |5 ^/ X7 c, f
8 W, a+ R6 T; ?' {) _# L$ ]. @% n- function create(ctx, state, entity) {0 ^7 N; C+ \8 p; a7 e
- let info = {
- |8 p7 G3 n( a* B' e1 s7 t - ctx: ctx,+ W% w |" k; V0 H
- isTrain: false,
N2 \/ f) }' b6 B5 s9 F* \2 X& b - matrices: [mat],
- i) y0 x( l! {% @% r9 g - texture: [400, 400],
! m; o- s. O m% R9 K- [8 \, F - model: {% V" _7 m: C: f; I/ c, q
- renderType: "light",
7 a6 @0 v7 ]: R - size: [1, 1],
2 W' z. C6 t5 g% q - uvSize: [1, 1]
+ A6 Z. B* d+ X - }
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- let f = new Face(info);9 U) `# I% l ?9 c
- state.f = f;
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/ a) [/ y: ^ J9 B0 U" ~; q4 P# z- let t = f.texture;& V- h9 C& s! }+ X
- let g = t.graphics;
& o! v4 t, d" d7 } - state.running = true;6 `% k) y( W2 o6 R
- let fps = 24;2 t7 x+ _2 t4 O( f' }
- da(g);//绘制底图
; C( G6 X7 F, v' i+ L1 l" P# S - t.upload();
% K( @" U+ K, Z3 \; V# I" {6 [* M - let k = 0;
- ~6 V5 h: L5 c( X - let ti = Date.now();# v2 b+ |0 q. T. z$ p
- let rt = 0;7 `8 Q/ [# l/ Y0 @$ U" ?
- smooth = (k, v) => {// 平滑变化
' V# g( H8 N: |4 ~3 } - if (v > k) return k;
h$ r) {& O/ p1 W; E* [! K j - if (k < 0) return 0;
7 v9 B% R2 a- V' y3 Q% w; u - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ H! W. v+ W4 e4 \9 _9 u( U
- }
! l" C% c5 @/ Z; y. D6 M& K5 d - run = () => {// 新线程
. U5 Y) Z4 y. C - let id = Thread.currentThread().getId();
/ F/ w" i4 @* }4 ^2 g - print("Thread start:" + id);
& k9 s2 v- }2 I. U1 e, c - while (state.running) {
0 N8 |- A+ L- O! k& ^ - try {
- U0 M) r( U' m( O1 `# E - k += (Date.now() - ti) / 1000 * 0.2;3 ] Z7 _# C4 j2 n H
- ti = Date.now();
: R: u% @4 n0 _! G( I( Y# ]3 U - if (k > 1.5) {& D( s1 u6 J9 Z
- k = 0;
+ ~" K$ {. o# m9 S8 i - }0 r8 U& I5 ]: I) U$ n! s
- setComp(g, 1);
8 e( x6 Y1 G9 Q6 Q2 l9 `6 a - da(g);$ v* o' R- Y$ r$ u- j
- let kk = smooth(1, k);//平滑切换透明度
! N2 U0 a5 D0 K* `/ ^5 }) s - setComp(g, kk);2 ` y# G0 g U f
- db(g);
( ^1 B* G7 V4 T- ?# _ - t.upload();
2 h( l( h2 L% s v/ R: O - ctx.setDebugInfo("rt" ,Date.now() - ti);
6 ~" r( v* X" v6 X; b" V4 R - ctx.setDebugInfo("k", k);
4 l, R6 ?$ e* m6 e6 U, H: N, i - ctx.setDebugInfo("sm", kk);
) v4 T' w; f% _0 | - rt = Date.now() - ti;
5 d0 ]- E( Y4 s y - Thread.sleep(ck(rt - 1000 / fps));
2 F& ~# R: ]9 Z- D5 C/ q: N6 |. r- Q - ctx.setDebugInfo("error", 0)
' ]: A% {. ~+ a# b- A - } catch (e) {
" P" ^4 I2 O$ o! {1 e - ctx.setDebugInfo("error", e);0 b7 a7 d; L& w" Z
- }
1 o1 F- i% O; O" ?$ B - }7 K& [3 b+ m; X3 N8 d z9 ?; x
- print("Thread end:" + id); x' X+ p0 L* R' ` [
- }
- O4 M; D% [% \! f - let th = new Thread(run, "qiehuan");
: }, d) c# a+ }& o: M% }) d - th.start(); q2 W6 Z' J% n
- }4 F6 X% V/ K. R& v# V
5 q/ H# u7 ` C4 B0 J: z5 M2 `# U1 E- function render(ctx, state, entity) { A& T* \) R) D4 U1 x& U
- state.f.tick();
; e+ y, F4 a" U! K! e - }
$ I" w: ~: i( Y! j4 M& E
) A2 c5 e: `1 u2 l- {7 K- function dispose(ctx, state, entity) {
& j6 T' |7 U$ z/ P% `, _ - print("Dispose");2 E$ n6 y1 Z( P+ A( X
- state.running = false;& w: o7 J. ]) ] f- e
- state.f.close();5 |) S$ n' B, w$ v. Q, T
- }$ \, l# d$ T( @0 T$ y
1 Q( t0 O9 g( R" n8 K- function setComp(g, value) {- N% P+ ~( B* O8 X- G) v3 D1 i
- g.setComposite(AlphaComposite.SrcOver.derive(value));( B: q8 q" A) E, y8 o
- }
复制代码
& ^7 j8 Q. i: f% l% W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。) @+ S2 T5 d0 ?8 F* l
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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)
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