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! f# ^0 ^, ~- M2 P( \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。# z, C0 B' W1 r# e
- importPackage (java.lang);. A. J2 P0 u' X, V6 X8 ]0 a: P
- importPackage (java.awt);
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( A$ @. c( A; g% h1 T5 @3 Q6 u- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ j4 l C5 H. y8 ]) K# Z/ j- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 P; n+ q4 s! t8 D( p* ^
2 B3 w# `- t# X4 M, U- function getW(str, font) {2 ^% d& X: d% V, A f
- let frc = Resources.getFontRenderContext();( i% V1 k* _5 A+ c6 [5 r& A
- bounds = font.getStringBounds(str, frc);1 K! K: q, ?7 W/ s: a- P6 u
- return Math.ceil(bounds.getWidth());
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& G$ ?: I) O- p- F- J+ `- da = (g) => {//底图绘制
) Y, D4 `' O: h3 n - g.setColor(Color.BLACK);
( o9 R9 f* |$ d! a: y6 a - g.fillRect(0, 0, 400, 400);
: ]# Z5 ^! b8 {2 a - }
+ T1 R* t# m/ F2 [9 f: u' { - & U+ }& X1 {% r: k, a$ z
- db = (g) => {//上层绘制
; W6 d" {6 R/ C6 Y - g.setColor(Color.WHITE);
: ~$ w* u6 e" C' |0 o9 E) j( T6 V - g.fillRect(0, 0, 400, 400);; f2 a4 G/ S* Y* U. P! b9 K
- g.setColor(Color.RED);+ I3 `) m8 m9 Q- \( n% H
- g.setFont(font0);
. b* @* h- z; O/ P - let str = "晴纱是男娘";
0 X1 |+ }5 ?; o% V6 N9 Q4 o8 E+ L - let ww = 400;! J- A9 z5 q3 o8 N6 }3 m) o- x: Q
- let w = getW(str, font0);
5 f1 B$ {2 E4 M! M/ V; R' w - g.drawString(str, ww / 2 - w / 2, 200);( D, e# W2 v, |. i& o
- }
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# v6 w/ Q$ ^+ m- const mat = new Matrices(); u6 A& K! r5 \1 p+ J+ R- a
- mat.translate(0, 0.5, 0);/ w7 H/ E' Z5 N% l
& I, f; O1 d% I8 z1 C- function create(ctx, state, entity) {
% g7 z- r4 b% z, J7 N# n) O - let info = {
" K, `! X/ i% j# v4 o5 M - ctx: ctx,* g3 I! ^6 \+ b1 P( }# }
- isTrain: false,4 W/ Q# I" u& {
- matrices: [mat],; ~" U3 H2 }) m8 _8 [, `3 W
- texture: [400, 400],
) f1 u3 c3 Z5 Y9 q. _4 c7 H% g9 i - model: {
0 d% y. Z( g8 i - renderType: "light",+ @. Q0 A; y& }7 d
- size: [1, 1], w6 c& u$ `+ z7 b' r- B
- uvSize: [1, 1]
- Z$ J6 @- h# k2 u - }
1 y+ A) U3 R8 o# N/ i0 p' G# h - }
3 r+ K5 h- D' y' b% u* } - let f = new Face(info);
6 X9 J6 D" W4 w4 V% \ - state.f = f;
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- let t = f.texture;
% U) g- q9 Q- Y8 Y3 ?! @ - let g = t.graphics;
5 x# c5 x) G6 s8 N5 v$ }: @ - state.running = true;
8 q% D, _6 C2 b1 C5 E - let fps = 24;; _; F. }! y9 G0 y5 H' J
- da(g);//绘制底图
c9 D6 B, \( u- E% R - t.upload();
2 D; c5 o3 u9 [, ~. y: A: F - let k = 0;% z1 Q9 z6 \$ p7 {9 q* W% [
- let ti = Date.now();
, E' ^, W4 m8 I) V. y/ S - let rt = 0;7 g; R* |. k" ^( k
- smooth = (k, v) => {// 平滑变化. L) D+ J% _8 v4 M/ d9 h' r
- if (v > k) return k;" E$ b) H8 T# k
- if (k < 0) return 0;
1 F: i& K) I! n - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. ^/ a5 T [& k3 V0 T: K* J: x& X0 H
- }
0 R: s* Z. [+ @( f6 q: L - run = () => {// 新线程2 K4 {6 N2 B X9 f' u
- let id = Thread.currentThread().getId();6 p( w7 w ~+ |! X' O6 t, c
- print("Thread start:" + id);
" S {. K" h* m2 U) S4 W - while (state.running) {
. S/ U9 f# }/ N! q; | - try {& q& s1 _" @% T2 g7 b, Y
- k += (Date.now() - ti) / 1000 * 0.2;
- m3 x9 C) v% W+ l - ti = Date.now();
! R! `! q# F1 U3 o8 V% q5 z - if (k > 1.5) {
9 ?2 P" I- O( f0 g+ ^& x- x - k = 0;
- w Y; X, z: D# E - }
8 J0 a) Z6 g) Y) v( ] - setComp(g, 1);, f4 ^" S3 L5 ~, J
- da(g);
6 {( p+ h6 U' C: U3 o - let kk = smooth(1, k);//平滑切换透明度
) V3 y) {4 j! H8 i r7 ]/ m0 a& P - setComp(g, kk);- M6 p. `/ E3 w, D9 H5 Y
- db(g);- z- W4 O ^; d6 B Z. R8 V
- t.upload();/ ]4 D5 ^2 f( F+ B# K B5 @9 S
- ctx.setDebugInfo("rt" ,Date.now() - ti);" _' _- R5 d3 R6 c" }3 V
- ctx.setDebugInfo("k", k);
, @0 B' e% }% `8 B8 U2 q - ctx.setDebugInfo("sm", kk);
q# t' C, G) m9 E) a - rt = Date.now() - ti;* \- s* L7 ^, f2 W
- Thread.sleep(ck(rt - 1000 / fps));! g8 A# T+ W5 X
- ctx.setDebugInfo("error", 0)( m) ^/ [( B; ?/ f& P# J% g
- } catch (e) {
- d) S4 ?; p5 I0 A' y* e* g, P/ P - ctx.setDebugInfo("error", e);
% o$ s: S( K% ^6 j) m5 m - }
$ ~1 g% S4 l/ F/ a# x - }3 }( w9 V& E. X. a$ |) F5 Y3 i! r
- print("Thread end:" + id);
- u8 d! u8 M3 }' d' v( L - }
' I( [" T) E3 x, l. U9 y" d- E5 r& y - let th = new Thread(run, "qiehuan");1 L8 l" j' X; J' `/ b D
- th.start();$ L6 j& U: A$ u6 ~# r+ f
- }* X( o& ~" B* M; H
: \ l0 H: r4 E4 S2 W4 O; m- function render(ctx, state, entity) {
4 j2 f; N* p; E3 O" L& V* Q - state.f.tick();7 ^1 c. z" T/ B
- }& W+ T5 \2 U* q5 r: L
- % ]/ z9 H) v: ^2 X1 B- L) {
- function dispose(ctx, state, entity) {1 [4 h; U: b, U( u+ Q
- print("Dispose");) [5 s: I! m- W8 M* p4 n6 N
- state.running = false;, m, q& ~: ~* ?& i
- state.f.close();
' ]$ Z3 n( j* d$ c3 T" l% A1 G - }
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# j1 v* m. z: I/ [) P5 g2 b* u; W- function setComp(g, value) {% ]0 h/ i: s* g5 T: g+ V
- g.setComposite(AlphaComposite.SrcOver.derive(value));& _- F- `1 P$ D k3 m7 n% m) n
- }
复制代码 % I4 Y4 @+ a& g& ^* s" I" j
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。* [8 b) W6 [$ A) i* d7 j3 k
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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)" J2 s- B/ c% J! f6 n$ F4 r7 ]
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