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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 ^! ^4 j: w/ Q) i9 \2 R) m
- importPackage (java.lang);
3 {9 w& n8 O# T- m" P4 n - importPackage (java.awt);
6 D8 l- U8 N' D) c5 }, P8 S - 7 S9 L! \5 c P! }* w
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ _) A$ ~6 W+ U; u# h
! ^( U m9 {) v- function getW(str, font) {
2 k& X9 j* x/ q1 C1 T6 I - let frc = Resources.getFontRenderContext();4 k" b" c5 \/ N" y* K. E8 \
- bounds = font.getStringBounds(str, frc);! E* @3 U9 h3 E% b* |
- return Math.ceil(bounds.getWidth());; C6 }1 ?: M0 H/ l5 n) C) k) b
- }
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0 f |" o J3 F9 m# Z+ f% s: L- da = (g) => {//底图绘制
0 x5 V+ }% Q, O: y; l. G - g.setColor(Color.BLACK);
6 h! g2 U- z2 A5 w) c5 C3 F; e - g.fillRect(0, 0, 400, 400);
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- ( P* z* \: r. w& I. n
- db = (g) => {//上层绘制5 O- U6 V) q# [; c* W; A: i
- g.setColor(Color.WHITE);& x! t) ^* ~" Y/ C# d1 u- `4 @
- g.fillRect(0, 0, 400, 400);2 h* T# J: @, h, D1 w' E4 l
- g.setColor(Color.RED);8 h* J; ^2 y" u" V* J
- g.setFont(font0);1 n [7 ]/ C- \6 Q( M
- let str = "晴纱是男娘";( S! r/ H8 b1 L1 `1 ~1 Y
- let ww = 400;
7 e- m* J2 h9 {& J/ ~7 b/ g - let w = getW(str, font0);$ F! K: j4 J+ |6 v8 Z/ P' U; S
- g.drawString(str, ww / 2 - w / 2, 200);
% b8 F' J( w1 q0 |4 w - }
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- const mat = new Matrices();
, D$ U! B% l8 K - mat.translate(0, 0.5, 0);- g+ K: V& o* @3 H# g$ v: ?/ v; a
- & s5 u3 @5 F+ [& A6 e: H+ a
- function create(ctx, state, entity) {
- X/ T0 f& s; Y5 k) C+ | - let info = {, h: i% ]4 W8 {% \9 ?+ M
- ctx: ctx,
% t# X9 T' _6 E1 z* \2 P - isTrain: false,
x7 F' ?1 z, [7 `0 S6 K - matrices: [mat],
* R. V# @4 i3 Z# @) Z) ? - texture: [400, 400],: a. Q1 ~$ K# k/ p
- model: {- U1 l G) N2 r, v
- renderType: "light",
, ~! m% L/ i3 `& O$ S - size: [1, 1],: b; ]) u8 Y& t9 ]% o
- uvSize: [1, 1]6 m0 a+ Q) H1 ~( @4 A$ F/ e
- }
- ^! r( ^' [$ `( U. e - }; X3 b% |8 |& F5 Q- e L
- let f = new Face(info);
# _' K) K/ d1 k. Z% V( G8 m - state.f = f;
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, B9 |) }, V" G- let t = f.texture;+ A8 U n1 w0 e- D0 L: `) \3 R
- let g = t.graphics;* c- H: x) Z2 a1 p- C+ m1 L* x6 n
- state.running = true;
" G, r9 T9 L( |' ^/ |- e - let fps = 24;5 M# V3 s# d( u4 g
- da(g);//绘制底图+ Z ]% s8 Z6 H+ E% S) m1 k
- t.upload();
# l2 {' F! q" `% v H: W - let k = 0;' w* r4 n7 I j# G4 v! W3 j% T( `
- let ti = Date.now();: u- K0 J4 x: l9 X( c2 H
- let rt = 0;6 s& [9 }1 m/ ?, O$ R4 |
- smooth = (k, v) => {// 平滑变化
5 c2 Z2 r- k* k+ [6 u/ u' ~ - if (v > k) return k;
( V0 e$ J, K! n7 w8 |# G - if (k < 0) return 0;* `( ]2 f$ r. \( ~8 ?5 L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% M2 p# z1 K f+ j, M! @3 p1 I - }8 [" [. k6 Z5 s
- run = () => {// 新线程* |5 Q! ~5 x: t* Y3 I
- let id = Thread.currentThread().getId();
3 ^' x- r. ~7 _# J) S7 P1 y5 e - print("Thread start:" + id);
5 c! ?7 F8 l5 j) \ S0 x7 ? - while (state.running) {
/ D3 o \( X2 ]9 F1 g/ H# _ - try {. v6 b% G6 M6 p+ R$ f8 M @
- k += (Date.now() - ti) / 1000 * 0.2;. T1 ?/ v( S, ~) p, R+ I4 l1 p
- ti = Date.now();5 e5 u. \/ D. q o1 J# g0 [
- if (k > 1.5) {
1 G! P; m# I& `" p7 Y4 T/ U - k = 0;
6 e/ x- `5 j. J- O2 I; ~ - }
, c" {$ v% t& u7 n! d2 V: `, I8 D - setComp(g, 1);1 d/ L# ]) v t9 z: M
- da(g);
4 j1 W$ W, X7 l! J - let kk = smooth(1, k);//平滑切换透明度
' O: @% p4 b& b$ i5 g, o( H! q - setComp(g, kk);; t- H: b* _1 Y
- db(g);
3 z: W/ d' _+ A: r; q' ] - t.upload();( s4 m- o: o( y8 D
- ctx.setDebugInfo("rt" ,Date.now() - ti);; e; E! Y( e; }! Y* e3 F# T q
- ctx.setDebugInfo("k", k); o) g* q7 [# A8 H4 N3 l' }( A
- ctx.setDebugInfo("sm", kk);1 K9 T2 ~$ W, ~" C2 h
- rt = Date.now() - ti;5 _. B9 V5 ]; `2 Y# f1 X4 I
- Thread.sleep(ck(rt - 1000 / fps));
$ I" F- M; I2 V - ctx.setDebugInfo("error", 0)
5 d w$ G6 Y% v8 E# q - } catch (e) {" @& P5 W ]4 S; P
- ctx.setDebugInfo("error", e);' |( x4 D" C- a- x
- }! M* f! }, v' }9 |& o: p
- }% d' x) [4 ~/ ^6 i2 k( R: X5 {
- print("Thread end:" + id);
) v! g; e" V/ p/ }6 h& @6 U# y - }
' ?6 l$ `& ?# Q7 E5 H* e0 \& q - let th = new Thread(run, "qiehuan");% U& f+ M {$ _% A0 w
- th.start();4 X3 _7 P ^1 X# H
- }9 E; V& I- B3 U% Y4 c6 I2 {
3 |- C5 m6 x* X3 X; g- function render(ctx, state, entity) {" q. t( R% o9 R2 |/ L
- state.f.tick();) L0 [. y. W* y& n( |- S& Y
- } |& y2 t! d, \3 ]
8 V- h& ~; k% Y0 A- function dispose(ctx, state, entity) {
+ [; H; Q- b, _) h6 N9 P, y - print("Dispose");, I& s" F4 z7 q: ?0 Z% B6 R& z8 C
- state.running = false;
! |7 s9 x9 f. `6 A$ K - state.f.close();" @' W/ l) K: \. V! ?
- }
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) P) Q+ B) H* y6 P6 ?4 I8 B- function setComp(g, value) {
6 J& w+ x- I* ~/ L+ j+ I3 z - g.setComposite(AlphaComposite.SrcOver.derive(value));
' y7 N3 t1 r. g% c: B - }
复制代码 & |$ O2 s) ? b1 ?/ u
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。/ B! z+ o+ E+ u7 U& {8 H
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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)' C* @5 c, _" N4 S E- e& V
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