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: ]4 R. h$ v- x5 W& 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。5 |% \ a( l6 t( [1 g4 [9 H
- importPackage (java.lang);
% P) s" x9 W+ C: p - importPackage (java.awt);
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) l8 Q3 w4 u& {$ B- include(Resources.id("mtrsteamloco:library/code/face.js"));
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) ^$ `* T2 ~2 c3 H# _( }0 T- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 E/ T& z' O- Z- ~9 m9 L
- / m# f5 D) b1 n! k8 Q
- function getW(str, font) {
3 Y: y$ g; Y; E! C8 B& h; ?# ?9 L - let frc = Resources.getFontRenderContext();
+ [( k8 g; d1 V - bounds = font.getStringBounds(str, frc);
6 i, ]4 ]: R$ b# d: D5 ^$ B - return Math.ceil(bounds.getWidth()); x) A( r6 s5 c( \# Q
- }
2 {! r% O; F8 D: e- e) `4 J2 s, v
/ O: q+ s& x4 `. z- da = (g) => {//底图绘制
( K$ @; d5 L8 ? - g.setColor(Color.BLACK);
2 K# `* W! ?, u! V$ @/ T - g.fillRect(0, 0, 400, 400);
0 s3 y( [( J/ f/ B3 F - }
. R$ l8 x9 I% u+ \6 b4 q
- g- m/ K4 A: j& t- W- db = (g) => {//上层绘制8 e* w1 }1 z2 y; N6 o; q x$ @
- g.setColor(Color.WHITE);2 B/ ]$ ^6 ~7 d& a3 A) R, F
- g.fillRect(0, 0, 400, 400);% W9 j' }) k+ e
- g.setColor(Color.RED);
2 T4 O' K0 t. \. V - g.setFont(font0);
( e. m/ G& y8 \8 z" q - let str = "晴纱是男娘";
3 P0 W8 k5 y8 f" N+ h: D: w' s - let ww = 400;
0 F3 A$ M% [( P" q+ y - let w = getW(str, font0);
/ f3 V7 A/ c# B3 d9 L5 p - g.drawString(str, ww / 2 - w / 2, 200);- k- q: o' B9 P' I0 e& a9 y
- }
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! r9 W! l0 G8 ^% _; z5 ~/ s- const mat = new Matrices();
6 s) ]8 S$ ~8 P; o0 e: } - mat.translate(0, 0.5, 0);' P( _+ [, M7 E9 G7 d/ N
- 5 R* H. c3 M, q: b" X+ i* d7 t
- function create(ctx, state, entity) {
, ]6 t' Q Z* s9 Q7 m - let info = {; A2 n% }1 j! l" v" q2 B
- ctx: ctx,) |- y' \# ^$ y7 I
- isTrain: false,
& `' ?/ P5 z2 U( X | - matrices: [mat],4 v: e" l9 U+ d3 g& [
- texture: [400, 400],
( X0 t$ q/ | |- G - model: {
7 q% Z; N+ | m/ M - renderType: "light",4 K0 [0 x, K9 w: H
- size: [1, 1],
# `/ Q F: x9 X' e3 u - uvSize: [1, 1]
8 X9 [' t" T9 ~+ k/ g - }6 J& ^( {( L8 ]
- }
/ |0 Q" J# @0 d) f" h - let f = new Face(info);
7 j' m2 u' e: { - state.f = f;# Z/ Z/ R7 `% H( y) |9 @& W, @% p
3 V c. n& ]" l9 V) g; k8 y7 l! Q5 p- let t = f.texture;
3 \( }( c+ v, U" A& ^, O - let g = t.graphics;' _0 B5 D K0 ?3 k/ K+ |3 g, h
- state.running = true;2 J7 y H/ l9 \3 Y1 B3 q x" l* N) P
- let fps = 24;7 ?) R; s! Z' P2 s
- da(g);//绘制底图
$ _) `( Y2 w8 }% T! D+ y3 V3 f P - t.upload();$ v, h, [" B8 R8 B+ O3 N: h8 H. n% ]
- let k = 0;
$ i6 O' ~( v/ I& H - let ti = Date.now();
( ^: h/ {/ Q$ e4 H - let rt = 0;' B& [2 i2 Z. i0 n3 _/ g1 v" Z
- smooth = (k, v) => {// 平滑变化1 K5 m* z" T! B: n4 i' i4 e! Y) f
- if (v > k) return k;
* m1 s3 Z& [9 O( y8 n8 ^5 l - if (k < 0) return 0;2 O' S' S7 T( H4 {9 g/ i7 T6 P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 N( a( _0 X2 X. t - }
2 ]) [0 T$ B0 S1 }3 j! O H C& m - run = () => {// 新线程& h* E B0 v, ]
- let id = Thread.currentThread().getId();, U& c3 M" `: A1 C# f1 S. o# p
- print("Thread start:" + id);
' q4 r# S! O$ R7 [ x5 N - while (state.running) {
8 I% z* r- M% f, E0 _ - try {; ^" V0 j7 n# Y: s
- k += (Date.now() - ti) / 1000 * 0.2;8 O+ @1 T( j( M8 ~' f$ k( I
- ti = Date.now();
5 v$ X, T$ Y" m1 W3 k: @& h1 c1 j - if (k > 1.5) {
5 r( ?( l+ g# ?, |# v5 T/ R# h - k = 0;
( E' E a6 \& i* R1 l8 C! v3 | - }& s. p; {) o7 y
- setComp(g, 1); j& f5 }# Y' C9 ?$ s1 D. w* i
- da(g);' d% w$ ?* U+ v
- let kk = smooth(1, k);//平滑切换透明度
* b$ K: l2 J+ j' [" C* U @" ^% u - setComp(g, kk);
; P7 m7 D( t% u0 e; E" m - db(g);/ g: ~0 d3 Z3 S! [1 z3 M! f
- t.upload();8 a6 V9 x$ t# Q) h. w
- ctx.setDebugInfo("rt" ,Date.now() - ti);" K& R* L0 E0 O' z! t
- ctx.setDebugInfo("k", k);
2 C) I* Z R9 v+ C - ctx.setDebugInfo("sm", kk);" q1 F" p( C2 n1 E
- rt = Date.now() - ti;
6 V/ F, u! J$ n6 [$ v - Thread.sleep(ck(rt - 1000 / fps));0 }, v/ h8 V. Q: _" ]0 N- v c) c6 g
- ctx.setDebugInfo("error", 0)
( m _* i) I1 |+ P7 X - } catch (e) {
1 e# @: a4 K' N - ctx.setDebugInfo("error", e);1 k9 H$ n+ x0 x8 e/ B9 Y
- }4 g' P5 {, W& v. x- M; N
- } q) V; L% F$ \- M
- print("Thread end:" + id); l( X( K5 L* u
- }
2 E' h e- T* f" J& {; v - let th = new Thread(run, "qiehuan");
. W% A& B ]) L1 f2 L# _6 b7 p7 F5 y - th.start();
7 A4 h P% @- U7 s% h, W - }. X& R! z, P7 G' ^
8 X* _. ?+ _9 q( g* z# E! q- function render(ctx, state, entity) {
: A6 s4 y' P5 ]+ E+ x. d; q - state.f.tick();; f7 o& o. } K: t% X) J* }4 `
- }
& d) ?1 k2 p2 H' I. @( o; q - r7 z2 c* X/ m s
- function dispose(ctx, state, entity) {5 ?: x: I) s( R( Z. u
- print("Dispose");: v$ ~* G% L% M4 L. x- \$ A
- state.running = false;
( N) ~/ g7 m2 j; z- K6 S - state.f.close();6 Z" B" E4 r. w5 T/ B1 U
- }
- i% n4 d9 V- A2 Y - 4 H0 d. ]# X/ Q5 v+ E9 ?2 l5 w, M
- function setComp(g, value) {
$ K- C: b5 S( w# s - g.setComposite(AlphaComposite.SrcOver.derive(value));
( Y$ {2 I( I6 ]) F& `5 B - }
复制代码
- B0 ? u* D2 [" U8 O3 Y8 U; t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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* X4 T9 ?1 i" x+ }9 [, }顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# G9 U5 Y c, y6 ^3 w
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