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+ @9 L4 l, o1 H4 R n* y7 G' 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。
$ d( M+ J7 `6 O& X$ s3 W- importPackage (java.lang);
7 S; ?# N/ T6 y$ S - importPackage (java.awt);; N+ t, ?, @3 T( r/ H- X( l4 z) r
- : a2 V2 X4 T; Q4 j1 I
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 b+ Q0 o9 ^) e
- 0 [, O4 V( ?3 L9 {( D) n8 P3 n1 B" \
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 S. C2 U. b; i9 z2 J4 x" ~
8 G: _& n! w5 B6 {* t2 W. E+ t; i6 n- function getW(str, font) {
3 { a( N: h3 I3 m7 f' q! F5 ?1 \ - let frc = Resources.getFontRenderContext();8 t( P S) B; y2 N
- bounds = font.getStringBounds(str, frc);
1 N0 S6 N1 ~2 M) ?, X3 \+ l- B6 _* z - return Math.ceil(bounds.getWidth());
% O, R. Y r8 c - }2 ^2 I% H+ C4 [( u
; l; e: _8 x5 w. i7 m. E _- da = (g) => {//底图绘制
& a: c5 I* n' x( c' | - g.setColor(Color.BLACK);
" l' J/ P; K0 \5 G2 [- ? - g.fillRect(0, 0, 400, 400);
' H! U9 H9 a3 ~! F: h& y - }
9 W0 {+ C( e/ I0 m# e) L% {9 ?
& I) d8 ]. D0 U2 t) m/ K4 D- db = (g) => {//上层绘制
% P: {$ d- N: h* c - g.setColor(Color.WHITE);
$ ^8 H4 G$ f" R9 @2 I. P$ R" l - g.fillRect(0, 0, 400, 400);# p" ]9 ] H, \
- g.setColor(Color.RED);: m; N4 ]/ Y, o5 S5 u
- g.setFont(font0);
0 Z6 p( v0 s5 W! Y. T - let str = "晴纱是男娘";
6 g9 D0 G! U" F' s: D. u - let ww = 400;
, Q0 j& g7 i' D) L8 t5 m - let w = getW(str, font0);
# _! ]1 t4 j! s! |* B$ I - g.drawString(str, ww / 2 - w / 2, 200);. O7 i. F- n+ [; O" p. _: J
- }
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3 Y# l; o/ u5 [5 @- const mat = new Matrices();6 ]* {; @" X. u* i8 `& e/ `
- mat.translate(0, 0.5, 0);
! `' j. d9 C2 x/ D - ) g# R6 H- O- W% f. m) A$ K m
- function create(ctx, state, entity) {' B! Z/ d# Q- x: J( h" [
- let info = {
! ~% g Y/ `* K& U$ d/ c - ctx: ctx,* S: S/ K0 T+ q* l4 G
- isTrain: false,9 }6 M- | I5 p, K7 c& z
- matrices: [mat],+ Y6 | O9 h6 X% t8 a6 |2 K$ C
- texture: [400, 400],- F& ^) O1 F! E1 x
- model: {$ j, g/ `( c* G4 |: N7 J: @. t+ n: I
- renderType: "light",- ?4 b' @$ T: q& ]0 L
- size: [1, 1],
4 b+ C# P1 r* v8 |5 j8 d* ?4 } - uvSize: [1, 1]3 D, h: I F) {5 B
- }; S- p( o8 S9 j% }0 W3 Q, L
- }* N- g2 A4 w9 d
- let f = new Face(info);) t" Y2 E7 P1 w: b" M- ~/ F/ n
- state.f = f;1 ]- z7 y* j' `) @0 d, Y
( B1 U( C1 p( E- let t = f.texture;
2 I* L: ?( o( D0 |9 ?, ~2 p1 M - let g = t.graphics;. q; w! B$ n% k/ N( f$ R
- state.running = true;
1 }% {0 {7 g' ] - let fps = 24;
$ `( u7 j3 R; h q" f, l - da(g);//绘制底图3 u8 z- o- B# S3 v
- t.upload();
5 K; C) u$ g% N, P0 `% D" e- ` i - let k = 0;
8 r+ \& ^& K# d - let ti = Date.now();
2 A( T- l. y$ J) X$ r - let rt = 0;: H! S4 S' p3 I& e+ G
- smooth = (k, v) => {// 平滑变化8 P" r5 P0 d" [) K9 s& K. U
- if (v > k) return k;
* z$ G9 G4 A8 h Y. ] - if (k < 0) return 0;& B4 Q7 L7 E4 q7 |! @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 [. H6 Z4 ?& z/ k$ e% U: L - }# Y2 d& h- i ^2 E# X
- run = () => {// 新线程
* K5 u2 v$ B0 H8 W! D3 F) s - let id = Thread.currentThread().getId();
: _. A0 b0 i7 C# d5 @5 _ - print("Thread start:" + id);2 P# ~. V9 ?, f( t) A/ u
- while (state.running) {
& k9 V+ v8 k: l" O# x9 [& _6 c" W; h - try {
9 B h2 X# U* E- ]5 ^# y: t' Z' P - k += (Date.now() - ti) / 1000 * 0.2;
9 V' x0 u& B# q' t% A - ti = Date.now();
7 ]% [0 g5 `& E1 q) ~5 A& @ - if (k > 1.5) {
7 U* ?- d- J x* [3 S! ]7 L8 A - k = 0;
( q! e& @/ E' M( K9 v - }
" Y1 b3 L/ D9 n0 a5 `9 C - setComp(g, 1);# s( z p3 S0 W4 K7 {
- da(g);
( t4 [& I, y9 E; w5 N+ T - let kk = smooth(1, k);//平滑切换透明度7 y$ J. {8 h }$ X8 D, f
- setComp(g, kk);0 x/ U3 Q+ }7 {
- db(g);7 g# A- d% s0 f. W' D \) \/ F: v- V
- t.upload();
0 Q* i, M k, a% ~, }1 O" \! n - ctx.setDebugInfo("rt" ,Date.now() - ti);! n# ^( s+ ?' @0 O8 Q
- ctx.setDebugInfo("k", k);$ R9 V4 o3 Z3 w$ G
- ctx.setDebugInfo("sm", kk);/ A; l- J5 h9 W( F
- rt = Date.now() - ti;& ~2 Z8 F, i8 z( z# L
- Thread.sleep(ck(rt - 1000 / fps));, |( O4 J z2 _6 `+ E" q: W
- ctx.setDebugInfo("error", 0)$ n4 f1 p( M2 n5 B3 t
- } catch (e) {7 V8 f/ }# ~: P/ a9 I
- ctx.setDebugInfo("error", e);0 z2 w: O9 a0 W1 I0 M: F
- }
7 G# r# `) F( r- }/ f3 z - }4 L' A* `1 ?; |
- print("Thread end:" + id); ^% l) p9 n$ [/ ?% I7 {
- }
+ d% G2 |7 E! S3 d - let th = new Thread(run, "qiehuan");7 L! ] H% Q7 V, f! H1 G
- th.start();% T( X# T3 t& D F. S/ E u
- }
5 l; R( m6 N' K3 G8 K7 v. p
. @+ A8 q8 `5 N; R- function render(ctx, state, entity) {- x+ F7 G ]0 m+ s4 y ~/ ]
- state.f.tick();
* u) @ D, r6 s9 T) y. r - }
9 S1 W3 V) `$ w4 W
7 `! ^3 e) v3 Z+ j- function dispose(ctx, state, entity) {4 r4 ?- V7 U# W' n
- print("Dispose"); b$ Z* r: e2 T1 \! Q [8 t0 V
- state.running = false;
" u+ J1 B: X ~) w2 n3 M* { - state.f.close();/ v; P3 v. d- n a
- }
* ^+ Z8 g. l f, H4 ]( v - % b; ~6 K& M; X. T6 y+ k1 I% c, ^
- function setComp(g, value) {
+ t3 `! ~- ]- l' {# k - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 a- ~& L& V. E - }
复制代码
6 T, {; l+ o3 e* W" Y5 ~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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)2 e4 v( ?5 M* n) B7 J* Y1 d) V
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