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& u8 y* M2 L! f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。: D0 Q- {0 O8 E: _! l4 v3 q4 H2 O
- importPackage (java.lang);
& _, E/ A7 x% A# H4 Y0 C - importPackage (java.awt);; N8 k. h+ R8 y) \' B% D
- 0 o; E7 f' l$ w# h* u
- include(Resources.id("mtrsteamloco:library/code/face.js"));
: V' c9 T" Z4 d" f
* j ~) S, Z! r, c0 @' B/ l: o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
( w! s; U( N% w1 a% d
$ x* S" H: U& t- t) M- function getW(str, font) {
" p3 o! I; U; R2 p" d U$ o; ^: g* t - let frc = Resources.getFontRenderContext();
' k/ a0 a" a/ P- J - bounds = font.getStringBounds(str, frc);9 I. \; j, R; U$ l; h9 b
- return Math.ceil(bounds.getWidth());* O/ ?7 J* z. O" \) [+ w" s
- }4 \9 E8 X2 s' a2 l+ {
, I* C- ^' n/ H- ~ {- da = (g) => {//底图绘制
$ O# h5 m" D& i2 H - g.setColor(Color.BLACK);/ j( k9 }+ b; b" }8 n5 O& R X
- g.fillRect(0, 0, 400, 400);
1 m+ _' A& Q# I# y+ P - }
- f8 L. i3 i) E. O - % U) B1 }* B9 e' Q4 x7 M9 {
- db = (g) => {//上层绘制
' ?$ C1 R }0 S' M! Y9 H: z0 ~ - g.setColor(Color.WHITE);
/ o5 R; J$ L( R0 b - g.fillRect(0, 0, 400, 400);
, k. L! Q# c/ h% k3 \" X5 A - g.setColor(Color.RED);
; I* s! U8 l1 I1 P, t. I - g.setFont(font0);$ d. ~- P7 g" ^% j
- let str = "晴纱是男娘";4 I- D( U/ L8 L2 M7 K$ \0 [" a, ]
- let ww = 400;4 D W J' I6 R0 d
- let w = getW(str, font0);/ T9 Q3 f9 X7 \% Z3 @! ?3 S
- g.drawString(str, ww / 2 - w / 2, 200); c' E ^' Y2 ]8 ^8 v
- }
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9 ?1 l& Y1 v: u) v) a- const mat = new Matrices();! a. \+ D! F: R/ o. l& q
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
: l N( y" [2 y" e+ E1 u. u - let info = {* T4 u5 f( @8 E& Z2 i! |2 ~* i
- ctx: ctx,
& M6 R+ z" e; V5 U5 g, R - isTrain: false,
5 A3 N# C4 a# ]# p - matrices: [mat],
+ ^6 H# r- H4 s+ K/ v# z1 X% }% a - texture: [400, 400],1 B. V& _" _) K& V+ L/ {- m: w
- model: {1 L+ b: _/ c( z' [% E" m0 u
- renderType: "light", c7 e- i% ^ ]7 h* u- L5 c$ e
- size: [1, 1],. Z5 P9 @6 I& y( c, [- M
- uvSize: [1, 1]& w2 J7 h0 v/ z2 G
- }) v/ k6 `9 l( _$ F( j$ |
- }
8 r& K7 v2 b1 K( T0 d2 \6 g - let f = new Face(info);
- S9 r) H- g: }7 L2 f' {! a, q6 i, j - state.f = f;
3 G* Z- \/ L6 w0 A* e - 4 ]( S# N% ]( T+ S% E
- let t = f.texture;/ X3 B# Q) j8 h( g' J
- let g = t.graphics;
9 T7 u7 U3 N5 _9 Y# l - state.running = true;/ a. D$ B) i& F5 U. d
- let fps = 24;) |9 S5 v! h/ L- k3 I
- da(g);//绘制底图% Z* o I; d1 F( C# K; X [
- t.upload();
7 D9 y; H0 \& F; k' S' X - let k = 0;& x: @7 i4 X- u0 `1 Y) _( [
- let ti = Date.now();
# f* D& z1 B2 {1 h9 N/ E5 X8 T - let rt = 0;: i! _- n# W9 O, ^5 a7 n
- smooth = (k, v) => {// 平滑变化: ^. C- x" d+ H9 k
- if (v > k) return k;
0 g0 p$ [+ k. d - if (k < 0) return 0;
- u& e, A" _0 L* C7 n - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( z; }8 m% Z7 P4 k. X7 K/ w
- }; q. k+ |& b9 F0 I. ?
- run = () => {// 新线程
% B4 q ~' B- O1 o0 L- s; t/ } - let id = Thread.currentThread().getId();& E5 E1 X. X. q$ e
- print("Thread start:" + id);+ K8 |* Q( Y. j" h: L# A/ X
- while (state.running) {, `9 k+ S9 ~" R3 z: X1 b
- try {
2 `9 X, q! [& }) \ - k += (Date.now() - ti) / 1000 * 0.2;- \7 _4 X2 A+ q) Y( n7 i+ c5 N$ D
- ti = Date.now();. {- D) H0 y$ t! g* _
- if (k > 1.5) {! L4 S* \9 X! k; q: i a) v
- k = 0;, l" Z/ H. i2 `; X# k
- }5 h% r0 ~+ v2 d' m% H
- setComp(g, 1);
# ]3 f5 ]* R- E/ w e - da(g);
- `8 S, w0 C! n$ `: E' B5 D - let kk = smooth(1, k);//平滑切换透明度( C7 L! ]9 K% E k4 d
- setComp(g, kk);
, e7 t5 P4 t( ~% P- ~( z - db(g);2 j/ s8 J- X( t5 i
- t.upload();
; L) q3 D) {# K4 ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);
- Z3 k% y. J* b; N) U/ K# w - ctx.setDebugInfo("k", k);( x& Z {4 p/ I' P) r
- ctx.setDebugInfo("sm", kk);1 s$ Q0 j& X% P' x! j. L+ \: Z
- rt = Date.now() - ti;/ q9 H5 r8 {# J0 p* _
- Thread.sleep(ck(rt - 1000 / fps));3 }% h" D$ p- d7 [6 Q% \
- ctx.setDebugInfo("error", 0)* I4 ~# [, D8 ~
- } catch (e) {; i# \/ B4 V& l
- ctx.setDebugInfo("error", e);
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- }8 b2 G0 k2 {0 \5 {2 g4 j
- print("Thread end:" + id);" Y8 S9 F: m$ l5 e. M3 m' _0 z W
- }% h; s0 F( m2 ~
- let th = new Thread(run, "qiehuan");
& V! `5 M9 \( V - th.start();
$ e, L& i1 |) ]" `4 o - }
2 L1 Q: e2 \; y
* I% L/ C0 X& C- x- function render(ctx, state, entity) {" z1 h& G" F* W; h7 a
- state.f.tick();# j1 `# b. |7 Q
- }) h% F/ x9 n$ V+ |
- , l; J' x$ i( a% D1 }
- function dispose(ctx, state, entity) {
2 Q' z4 T! v v. Y, p; ` - print("Dispose");
( w' t0 O6 y1 y% } - state.running = false;6 l, u/ q2 b1 B# p5 `" G6 m0 x; }
- state.f.close();
+ W' L n0 _& A( I3 h - }7 }% n% {; j) Q) |( e
6 g z1 [) n) z- function setComp(g, value) {
; r) ~$ o8 L# E7 e - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 [! u+ c# z O, @2 s# J' Q - }
复制代码
5 R" E# B; g& K( A) ^2 k- B; F2 {8 d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。' w9 v6 U( T0 x
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7 B: c4 y1 D1 E6 j' 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)& m. Z3 _# u. e9 |: {" B$ {" L8 y" Y
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