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9 s0 B% P( N& _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。
! s9 V3 i4 J+ V# F- importPackage (java.lang);
/ t7 W" Q: k1 i, e) z - importPackage (java.awt);. C# F. g. C8 n* q! E
- ( L1 K! p: Y' y1 S Y8 E) F. Q0 S
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; [4 `# q7 |3 g/ H9 ]- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {8 N& n& x; R1 a1 {7 ~. p/ F
- let frc = Resources.getFontRenderContext();
$ d/ _* T0 y& y4 K- F1 F& q8 ` - bounds = font.getStringBounds(str, frc);( u# t2 M l9 O! y* I: j
- return Math.ceil(bounds.getWidth());& B7 b& w* V* Z7 w P; N
- }0 n1 [% M- O6 R: w* O* s
9 b) l0 D! U9 U- da = (g) => {//底图绘制# J/ A' i1 g8 }4 l% a* A, C, h
- g.setColor(Color.BLACK);
1 Q+ D. |* ~5 p; e8 `% J' W" F/ i - g.fillRect(0, 0, 400, 400);5 p" l& y3 t+ t% _. B2 a; r9 I" a) e
- }& W! o! k( e7 u4 o' U/ @2 v' N* A4 Q7 Y
- 5 n3 d: V$ m2 Q$ p% l0 W" `; F
- db = (g) => {//上层绘制- O8 L* Z/ m/ Z0 ?" T2 c- k
- g.setColor(Color.WHITE);7 m) |) w& Y5 P% F" G% {
- g.fillRect(0, 0, 400, 400);
7 r3 ~( q& q- y9 h* }+ g - g.setColor(Color.RED);) t; V: U' U( c
- g.setFont(font0);
4 q& N/ l3 q6 l) l) g: @8 l3 Q - let str = "晴纱是男娘";4 ~" c% U' j$ Z$ p& \5 }( V
- let ww = 400;# V2 y: J+ b2 f, P
- let w = getW(str, font0);
6 T' i. A- F( t; ]- b1 p4 a4 X- `- u - g.drawString(str, ww / 2 - w / 2, 200);6 x, h6 w3 c- X7 v7 S
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- const mat = new Matrices();/ ], Y' w; o, Z: X+ h2 g1 ]3 S
- mat.translate(0, 0.5, 0);( R6 r$ x% x% z
- 9 G6 t5 i& }( t, }8 |4 o8 n1 k
- function create(ctx, state, entity) {
0 @" o7 w0 i0 F3 _: k - let info = {
e5 I b' p4 L3 i3 ]# u - ctx: ctx,
" o/ j& y5 U) P8 p( o" Y - isTrain: false,% L6 }% I7 B% `+ a
- matrices: [mat],
* W) S8 k& m, ]" x6 T, ~1 n - texture: [400, 400],
4 k% ?* R. ^! P, { - model: {
8 @5 i" ?2 R, O; O, _3 ^ - renderType: "light",
+ @4 l# f$ x. r3 I/ ` - size: [1, 1],
1 S( M5 w: }0 E+ l - uvSize: [1, 1]
4 ]- Q2 R0 u1 g" ?' e - }) |8 J+ g/ T6 I+ s h
- }. a0 A/ i. C& H/ G/ T5 y5 a4 z
- let f = new Face(info);, c9 m f* }/ J, w0 P
- state.f = f;
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- let t = f.texture;
9 \* t4 W: N: h, L - let g = t.graphics;
( k2 A9 e+ E% p- \ o* t - state.running = true;
; z7 X1 f) x& H9 T - let fps = 24;
/ {* d& t x, H - da(g);//绘制底图: b5 g4 W) ]" ?" D% E
- t.upload(); H1 Y% z& G! h1 H* h
- let k = 0;
; z! K. b; t4 i' o) U% j - let ti = Date.now();
. U( t$ A/ W/ G. f - let rt = 0;0 Q8 |1 @' A2 W' X
- smooth = (k, v) => {// 平滑变化 l1 w$ B X& [; {/ W
- if (v > k) return k;
$ l/ W9 m% V. E. ]! J. y+ Q - if (k < 0) return 0;% t+ Z8 B1 @; M3 V, v" G G
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ M/ N. V( L1 X" v
- }3 n* [' F) R9 w* D8 }
- run = () => {// 新线程
3 u A2 E3 ^' M! X" g - let id = Thread.currentThread().getId();
8 y: c ?& c3 N - print("Thread start:" + id);
9 r% C- I9 c& N: B - while (state.running) {, j4 E, t9 t1 H/ b/ j6 {
- try {# O! v1 F3 a1 J s2 [5 `$ Z# O
- k += (Date.now() - ti) / 1000 * 0.2;8 a- ]+ h9 U7 n2 h7 z, U+ A
- ti = Date.now();
b( P& ?) J& G: N: q. h - if (k > 1.5) {
% \ P0 l5 p$ G% @: B. d - k = 0;+ T2 C7 `# ]4 z, C; R
- }
" @: }1 x! y7 i5 T - setComp(g, 1);( w- X7 b! y: N V7 R+ P+ F
- da(g);4 s5 ^1 @5 L6 W+ Y' X* z, {
- let kk = smooth(1, k);//平滑切换透明度
% U( k. ]! R5 I$ b - setComp(g, kk);
1 n! ~: L; h9 K5 U: Y0 L - db(g);
. s- P8 ?0 X. K2 D& Y j$ E$ N - t.upload();; T! _- T3 E9 v+ b) t
- ctx.setDebugInfo("rt" ,Date.now() - ti);
$ }8 w) l2 F: g, z2 b - ctx.setDebugInfo("k", k);: u% l* S" S6 l5 Z% p: Z0 i
- ctx.setDebugInfo("sm", kk);
6 W- y. u& Y6 }% h - rt = Date.now() - ti;* g" C/ j) Y% j) [6 K/ l6 J7 \7 G
- Thread.sleep(ck(rt - 1000 / fps));
{3 i' G0 J$ Z/ y) l( e6 G - ctx.setDebugInfo("error", 0)6 ]: z- L) N) L) K; i
- } catch (e) {
- X. }7 W, M9 k$ l' q - ctx.setDebugInfo("error", e);( p0 B1 T; ^( Q' I* J
- }1 W6 E; z. n! K4 m
- }6 ?' b6 W1 u+ F! C O% t0 m J8 X
- print("Thread end:" + id);6 h4 j& ~& F7 i6 ]
- }
: I5 m5 H0 ?2 h* u- o8 G, | - let th = new Thread(run, "qiehuan");
0 M" Y$ Q1 H3 a3 Q9 { - th.start();
! U2 C5 |, N. N( h+ ] - }
9 z6 V! h5 @5 A
+ ^- q, m6 C/ l; G6 t9 g( _2 T- function render(ctx, state, entity) {, \3 E' M, I5 H& t. f: @' h) r
- state.f.tick();: n P+ e0 E5 n* w$ G9 J1 `: F
- }2 h- f Y* y' _, {* a& X
; V9 T) s- f0 P. E! _: y" m! r& b8 r- function dispose(ctx, state, entity) {; l3 r! Y+ c d7 G+ Z: q& d! o: n
- print("Dispose");$ g9 |5 p0 { T% q2 s4 d1 e
- state.running = false;
0 a5 _. B9 G: D - state.f.close();
1 ~0 {7 u) U% m$ c* D" s( l9 ` - }. G3 { v) n( x7 B- ]: v
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- function setComp(g, value) {# [1 U9 }9 G( J& [ u
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. f5 Q; J2 Y& x2 q0 X - }
复制代码 % C0 w( Y5 S+ v B4 R
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。
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5 ?. m4 h+ X% z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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