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+ t$ X. o+ j7 V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。, _4 i) M6 I; E, l6 x
- importPackage (java.lang);1 Y* m5 A+ x$ c* v( e( r
- importPackage (java.awt);0 H% B0 Q! e% O" {/ G' b* y
% u2 p9 \5 {" Q N- include(Resources.id("mtrsteamloco:library/code/face.js"));
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7 L$ \7 \3 ^! N4 T# i$ B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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! V- e, r: y0 t* ^5 W% W e; P/ L/ E4 r- function getW(str, font) {4 u! a8 f. H% J8 Z1 k2 W% `1 O
- let frc = Resources.getFontRenderContext();, l! n$ i) B4 |9 O
- bounds = font.getStringBounds(str, frc);6 K+ Y+ r [5 P, q' p+ K: V; w
- return Math.ceil(bounds.getWidth());
6 a! w' S9 M/ f/ s1 h! z. X - }
; k- ^& B+ b; P - + H7 g0 k% p9 }2 U
- da = (g) => {//底图绘制
# F) P$ L# y$ i' k" }: T - g.setColor(Color.BLACK);
3 q b( J6 {; f* F* N - g.fillRect(0, 0, 400, 400);1 {0 n* b8 @( a5 A, I$ D; h% ^
- }
7 Q8 T# }: J% D2 z - $ q3 _. M$ K) w9 K
- db = (g) => {//上层绘制8 x K& H7 I9 |+ E# Z; p) A
- g.setColor(Color.WHITE);
9 W( }2 B& S. l/ y - g.fillRect(0, 0, 400, 400);( A/ V* O6 I+ Y- G! t8 ^
- g.setColor(Color.RED);
) d, Y0 x5 W9 q/ L' f1 { - g.setFont(font0);
0 C) [# Y' `2 E6 k i+ P$ O - let str = "晴纱是男娘";% `% n4 a' D1 `( H9 ^
- let ww = 400;
5 ? J5 Q& u4 b6 B - let w = getW(str, font0);" R$ Y$ z5 {: H7 Z l' G7 H+ _
- g.drawString(str, ww / 2 - w / 2, 200);
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; k) s: o- f# |- const mat = new Matrices();) h5 x/ i& z: I0 k a
- mat.translate(0, 0.5, 0);! ^( ?% f5 S7 ?- _( {
- 7 C* {$ ]- \' T, ]3 G% O( Z9 g
- function create(ctx, state, entity) {
. z: ^$ q; h) C* e1 X7 n - let info = {( h2 k- F: b! P5 k( b6 m5 U" V
- ctx: ctx,2 {! J/ S4 y" p, @( l) x
- isTrain: false,
/ t3 B5 X0 M9 ]5 X - matrices: [mat],! L& t8 e( p2 ?" ~! F4 L& n' p
- texture: [400, 400],
6 s/ T- D7 s$ a4 Y8 J5 G; x* _0 v - model: {: \- k+ d. f$ a, O% [
- renderType: "light"," u( E3 H0 Q' v+ m5 l
- size: [1, 1],& H8 U) o1 K0 E& ^1 B$ R
- uvSize: [1, 1]# C6 U: F$ G& X9 ~$ b0 j5 w
- }; _+ s5 ^1 @2 f5 G; L, a
- }
; @* |, S3 m* p/ t# p h1 b6 y' D - let f = new Face(info);$ R" |6 }+ B3 g4 H0 d, \
- state.f = f;
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' ]3 n; t, V( s* q- let t = f.texture;
3 {: m7 l! B4 e1 C" y - let g = t.graphics;- R' e" U/ v1 l
- state.running = true;
% ?4 d2 J) A1 z$ { - let fps = 24;
* y* |2 F- M8 w. Z- E: B# } - da(g);//绘制底图8 x" ^2 _$ D2 {( N! w
- t.upload();; m k f( A& {! _6 d. ?! N; p
- let k = 0;
- m: V; N5 I9 F - let ti = Date.now();
6 Q# h: i2 y6 K+ @ - let rt = 0;! Y4 }7 z: I0 r9 j, O! @
- smooth = (k, v) => {// 平滑变化
; p& u5 F$ ?" N& j% ~* q& S - if (v > k) return k;: \, c% e2 r% W
- if (k < 0) return 0;
0 w; m( N) i% U* A5 U; n - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 d% n7 Q P. G& M/ B1 i$ t7 q- Z
- }
; b; C6 m, q4 w% M& k% x- c - run = () => {// 新线程# t' d! L0 E0 W
- let id = Thread.currentThread().getId();
: x! k8 K/ \: P# d; z4 b" Y - print("Thread start:" + id);
7 f" e8 L. {& Z' Y& d - while (state.running) {
8 C; B0 e, i1 k) b1 V" W& l( x - try {
. h, z3 ^* n! o: r4 e - k += (Date.now() - ti) / 1000 * 0.2;
5 w, U ~2 |; d0 _) u, X - ti = Date.now(); }9 @" ]6 C' u$ H( I* @) ?/ ?
- if (k > 1.5) {
- I3 ~5 c2 P! N- l0 r, q" L8 d - k = 0;! F& @9 E) p; ~6 T! T9 g1 m/ p) ~/ E
- }
; t( f! @: q! j/ ~1 p - setComp(g, 1);
$ P2 C: N. X& Y& q - da(g);
: X$ C+ B' B9 E$ ?; v- h$ C - let kk = smooth(1, k);//平滑切换透明度( ^% p6 O3 C3 O4 Y$ g6 c8 K4 x
- setComp(g, kk);
7 i( E& ^3 X0 x" ]* Y' z1 \6 q7 j - db(g);: y$ I# m/ M9 t" a: O N$ O
- t.upload();
4 o* N. F6 {6 z5 |, ]; E, \ - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ c* k2 \6 O; V4 M - ctx.setDebugInfo("k", k);4 k4 v; |4 X4 @/ d: M) d
- ctx.setDebugInfo("sm", kk);
4 S* a- m0 S5 ^0 Z8 ^0 K1 r - rt = Date.now() - ti;* N& ~# X! g% K
- Thread.sleep(ck(rt - 1000 / fps));1 { |* w+ M4 y
- ctx.setDebugInfo("error", 0)
0 \! P2 `% I8 o3 C - } catch (e) {0 Y5 Z: H. w& T$ m
- ctx.setDebugInfo("error", e);
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- }6 s- R" p1 ?; g
- print("Thread end:" + id);( b. J+ Z9 H. z# k, K% A9 E; i0 w
- }
5 B: i) w7 F0 |3 L/ P# I - let th = new Thread(run, "qiehuan");
5 a& y0 z2 q# L" Z$ `& n. y - th.start();
# |* Y$ ]" F2 r/ w. K - }6 E, _. Z% d# p$ G% P- i0 T
- $ ?* o( V( C; c3 d' s
- function render(ctx, state, entity) {
4 Q5 G% P( ~$ ]. \4 g - state.f.tick();' ^, f& M7 ]& n$ I. i+ b& Y% c P) M
- }' k! k% l( {, K% W; o3 p
$ n5 q! ]+ k$ g; G- function dispose(ctx, state, entity) {; ]% B5 G9 d( C
- print("Dispose");
$ {" H$ z# X, Z# X2 F, P - state.running = false;; k9 k1 ^% n* a( f+ ?+ d1 \
- state.f.close();
9 t9 i, k2 g" y - }
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: @1 |7 ?, i# ^6 V" G8 ^% K- function setComp(g, value) {4 A, b7 F5 B3 J' @3 s0 W: \
- g.setComposite(AlphaComposite.SrcOver.derive(value));
/ d7 p, Z8 C3 t5 b a; y* |2 A - }
复制代码 * j6 ]2 ~9 g. ~ b8 H5 M; H8 }
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。
1 c1 u2 v1 X4 {+ |8 |6 d0 @8 |" [+ {; Z$ b
: {3 \8 N- h) o6 c; Q @" \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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