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2 K% q7 ]+ o; r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。
0 @1 e/ P4 r& I5 d0 c- importPackage (java.lang);
+ s7 {9 `6 Y4 o. _ - importPackage (java.awt);" |- H* W/ e/ y0 g" N
7 o; D4 i* z2 |7 m* q" |- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# e' s- b6 E' M% S& s; E- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
; k5 b- o2 c- \. V; r
. T& c( Y/ U+ x# u- function getW(str, font) {
$ j$ C: T' ?5 i+ n2 k2 r1 H( D7 P" R; d - let frc = Resources.getFontRenderContext();: L% f4 g7 e, t! P; p* y
- bounds = font.getStringBounds(str, frc);
) @. q6 r1 V+ r# N2 M% o( q: M - return Math.ceil(bounds.getWidth());
$ {+ u/ Y% M2 m4 b2 f0 R - }
/ a- `. w3 s( u& ` - * y7 K& u; _0 G. f" x! A
- da = (g) => {//底图绘制0 f" G" n2 {) E' t! j y+ k
- g.setColor(Color.BLACK);- }7 Y, Q& T4 |
- g.fillRect(0, 0, 400, 400);
2 E0 I; \, y1 [2 T# W/ X' N; l& Q - }
0 u; }% [, L |! ?% T - ! i7 F1 ^$ s Z! J% h5 l
- db = (g) => {//上层绘制# n d; W2 G( t
- g.setColor(Color.WHITE);
4 d# L2 z" s, W4 W% x - g.fillRect(0, 0, 400, 400);
. R& [2 ?+ R/ {0 {9 E - g.setColor(Color.RED);* l F/ c9 f3 ^' O
- g.setFont(font0);% W. k* |/ F! |# n) C K. q: V1 U
- let str = "晴纱是男娘";: n0 t6 i9 \4 B. [
- let ww = 400;: A J- f& b& S% O/ z3 b
- let w = getW(str, font0);
- m/ h7 ?9 h$ B# z% [0 ^ - g.drawString(str, ww / 2 - w / 2, 200);
; i) ^9 e5 |( l( y( f T3 n - }
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- const mat = new Matrices();" {+ j2 [7 b$ H( r- j0 F! c: ~$ q
- mat.translate(0, 0.5, 0);
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+ x$ E* F) W. m- `1 J; \/ V- function create(ctx, state, entity) {
7 `3 |1 Y- N, {+ D - let info = {
$ o* _ t- B3 G% G - ctx: ctx,1 k/ N' d3 _% u! P. Z3 Q1 d
- isTrain: false,
- T, T/ L; e6 J - matrices: [mat],
Q& V8 M1 l3 y7 m - texture: [400, 400],
! T/ K- V5 M3 r f3 H - model: {+ c( h( Q, p9 z& _
- renderType: "light",- _( o# k3 d0 f) C! M1 G
- size: [1, 1],) R& |! g- o% `6 j2 [! S4 t
- uvSize: [1, 1]- P9 V$ o3 d6 t! z
- }
5 v! }) W6 J) N8 o4 U; x* T; R - }
& w' q, l. i5 m8 z0 D - let f = new Face(info);* ?) w, |7 ^3 L2 C! r* w/ q
- state.f = f;
+ m/ }" x4 v6 H
, v1 }4 a7 h$ o8 k) g6 r/ D: ]- let t = f.texture;
. \6 w3 ^: l0 I3 D7 g8 E+ E - let g = t.graphics;! H& ?8 {4 s9 H0 u
- state.running = true;' z: r1 Y: C2 k) ]
- let fps = 24;6 v5 t; G9 B' S1 P1 k
- da(g);//绘制底图5 U5 L3 H* ]$ V/ @) i0 U! {" I+ X
- t.upload();5 Q' `) Q9 M8 ]; E
- let k = 0;) {7 C p# Z1 G* v& p- Y" U
- let ti = Date.now();, ?/ |- o. z3 F
- let rt = 0;; M, u' R$ K6 ^
- smooth = (k, v) => {// 平滑变化! T# _1 \" B: w8 K, R% ?
- if (v > k) return k;
6 H1 K4 V8 U6 D: e - if (k < 0) return 0;4 z2 u0 |2 h. \% q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* {1 i( e; S9 ^7 O0 U2 C" [ - }/ a9 f4 c( {7 v; M
- run = () => {// 新线程' e# e% |' ^% x6 S4 x; B) z
- let id = Thread.currentThread().getId();4 n8 M) t* v0 d/ g. Z3 v% G0 M" @
- print("Thread start:" + id);
- H" k& E0 ?7 n5 _ - while (state.running) {" v J3 p {$ ^! d$ O
- try {
2 S& ]; @9 z. p$ r, K - k += (Date.now() - ti) / 1000 * 0.2;
( A+ V+ a& I* W: }0 ? - ti = Date.now();
) B# Z7 \3 Y8 q6 T8 y- R - if (k > 1.5) {
& U" f3 h, _8 e+ A5 D - k = 0;& e( T" C5 H: [& C, @
- }" j6 I& r1 s9 q
- setComp(g, 1);2 f1 r. U! s n+ _, p, P8 z
- da(g);
" i+ V. ?' r2 r' K. t$ z1 B% |( [ - let kk = smooth(1, k);//平滑切换透明度! e5 Q* u$ g1 r
- setComp(g, kk);/ L+ s0 K$ k8 n2 S
- db(g);
3 K# \3 r# v& n$ m/ o }) F" ?( \ - t.upload();
& @- B% o* d1 G% j1 e: F" H - ctx.setDebugInfo("rt" ,Date.now() - ti);6 u. {0 [9 B6 Q. V
- ctx.setDebugInfo("k", k);0 t, \5 O. `& @3 m7 w% n
- ctx.setDebugInfo("sm", kk);
/ k6 M7 F% E$ F) H- G - rt = Date.now() - ti;; J% F2 d5 B) L
- Thread.sleep(ck(rt - 1000 / fps));8 s, A$ N5 e E6 D1 |$ N
- ctx.setDebugInfo("error", 0)$ Z" D/ L- N/ e/ k- Q* X2 i- z( ^
- } catch (e) {
$ f+ F& M! R: b" d1 G5 d - ctx.setDebugInfo("error", e);
) c( d1 |# [' [( ~1 P! X+ Q - }
# Y! P$ z2 M7 L - }
( j, A; I9 F' Q- B/ b6 b - print("Thread end:" + id);( w0 j. p( ~' {$ o; @7 L
- }' P0 R- q7 x: n; L# r
- let th = new Thread(run, "qiehuan");
; \: R- M7 M! a7 W - th.start();9 \2 r4 L) ^3 N3 H/ a
- }
" W+ q9 O+ a4 e, t
% q' v9 \6 F. `4 V- function render(ctx, state, entity) {
% @4 P" R8 T; y( f' ?% K/ i" ^3 c - state.f.tick();7 ]! M6 z* \( d
- }
6 n5 U% B. y% i" o - ! M9 i) Q. ~2 o) G/ C, i2 D
- function dispose(ctx, state, entity) {/ H. R1 O: i% D( x
- print("Dispose");) A& [% N9 B- m1 A/ T% W
- state.running = false;8 E5 \* ^ q+ y0 F7 u& Z
- state.f.close();
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- " M3 O3 r, C+ _. x
- function setComp(g, value) {9 D2 C# L1 i" ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
# `$ `7 j% m. ?/ |/ `" K) E% u/ { - }
复制代码 $ S4 j* [' o( a
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。6 l7 N( Z- A& z6 Y- V1 G
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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)- B5 i( W( V3 Z5 M; v
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