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( J( [& w: c: H- B, b( x) C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。# Y8 {; ~$ O W _+ Y* ^
- importPackage (java.lang);
$ }/ ~/ [* r9 I2 ] - importPackage (java.awt);
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6 q% {, B/ o/ i8 {) b3 n; o) Q& W7 k- include(Resources.id("mtrsteamloco:library/code/face.js"));$ G' ?9 }' j7 v. _
* S- I8 E: P- [: u! O" ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: B/ E0 p& r: y# S# j+ a1 @- function getW(str, font) {6 u; O. _# I0 D# X- ^
- let frc = Resources.getFontRenderContext();
& X7 J2 b' _% \% p; U - bounds = font.getStringBounds(str, frc);. O" s) _/ l; p( h# h2 d0 k# {* |
- return Math.ceil(bounds.getWidth());& z& L4 U6 ?+ G* k: K/ h5 \: x1 ~
- }3 R# A c w# L
9 u, o2 `. P: U# O% L- da = (g) => {//底图绘制
: `. @! p6 l A+ Q, s0 C2 l& t$ X - g.setColor(Color.BLACK);
3 `( Q: M* l3 {% Z/ s! n/ b - g.fillRect(0, 0, 400, 400);
& }! x1 P! q4 C - }7 n/ B( ~0 `' t# Q# U! ~7 {
$ j2 u1 P0 d0 |$ g6 j0 W0 M5 X- db = (g) => {//上层绘制
% z- ]2 o/ K; `( Z+ V m - g.setColor(Color.WHITE);2 c+ G' H4 C# e; @, u8 c% L1 E
- g.fillRect(0, 0, 400, 400);& w% z9 x( u, _! t9 p& d" G) X
- g.setColor(Color.RED);
2 @9 F* L6 p1 {$ N" @# w" A: Y - g.setFont(font0);/ m: v+ _# c1 f }# q6 }
- let str = "晴纱是男娘";( X- K: R J: F) k: b$ a
- let ww = 400;! f& U' J$ x5 a
- let w = getW(str, font0);
) @: ^8 r0 W; ?0 x4 P0 T6 [ - g.drawString(str, ww / 2 - w / 2, 200);
0 J$ t1 L/ Y- N; b- J4 X4 y) b+ F - }8 B6 I0 P9 B/ H8 y* X
6 I! N* F, [, T9 R/ L- const mat = new Matrices();
s0 @% p4 U2 p3 y8 @ - mat.translate(0, 0.5, 0);7 F' Z) n" I7 D
- ; E4 M: B: Y' l1 u5 k, Z, Q
- function create(ctx, state, entity) {" x$ v( d, G3 _' `5 Y' Q( D
- let info = {
8 {: W E8 p. H. v; Q( e - ctx: ctx,
/ [# z4 E) P( M/ f% g( s& k; v - isTrain: false,
/ ^6 A% b- f9 [& }0 i6 |' d( ]' [. o8 p - matrices: [mat],
0 P8 k d. J* P/ A - texture: [400, 400],
( S8 k: L( V9 R* U) Y7 w - model: {
: }" H5 v! t$ Z- C3 m5 U% I - renderType: "light",0 i! ?% ?! E% c$ b4 \
- size: [1, 1],
8 _( |' F% C' |+ o7 L- w$ ]9 h - uvSize: [1, 1]
& m' W, o% j8 i- \ T - }
: u( ^2 I- p S, z) {, x$ o - }2 e& C [. `0 P* r
- let f = new Face(info);
. l' J) |% a: a! r/ B" x - state.f = f;
# y) y }, D( Q) ?2 S - ! y% ]6 A! U" S' W U2 N, |& b# d/ G
- let t = f.texture;
" G3 J1 d$ l' T - let g = t.graphics;0 S9 X- O8 y" \0 L z; y* x
- state.running = true;8 m: ^) [4 x+ m; V
- let fps = 24;
# N' R, O4 E9 A' R - da(g);//绘制底图
* F" C2 G- ~0 m- T- r# r0 v0 V/ y - t.upload();
& [0 W+ S, T8 V$ i k7 ~- o# O - let k = 0;) V4 Q+ r* z- s _* @& ?
- let ti = Date.now();7 D, L9 h' ]# R9 Z6 i
- let rt = 0;" n* x$ t6 [+ A0 o2 b
- smooth = (k, v) => {// 平滑变化
& m: }. |8 ?; W+ O5 i2 A+ j' f - if (v > k) return k;
. ?0 S5 d$ C& X9 u5 x. v! c - if (k < 0) return 0;0 K V, W) ~$ J) v; C
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* y- F- G! b- B) S - }
+ Y0 z3 O2 w3 j1 q - run = () => {// 新线程
' p4 A; A5 ~. k6 x8 E - let id = Thread.currentThread().getId();* i+ x% B$ o" J- h; ~
- print("Thread start:" + id);
9 h2 l" ~8 K; X6 x0 J) H; C - while (state.running) {
3 L+ k0 D1 b: ^0 M! @" o9 o0 } - try {2 L5 i" P5 }8 l& d: n( o- t
- k += (Date.now() - ti) / 1000 * 0.2;+ i9 q& ?; P7 H1 I+ U( W5 Q
- ti = Date.now();
+ ^: X0 H! Q2 a1 l - if (k > 1.5) {
0 K0 v$ V, |- v: G - k = 0;, ?6 X! [9 j4 r3 q _
- }/ d/ _; l' `, v2 S+ J) i
- setComp(g, 1);9 ~5 U9 f: u% S P
- da(g);, N2 |# i, z: f" [
- let kk = smooth(1, k);//平滑切换透明度
1 X" R. T8 i( y - setComp(g, kk);2 v P7 d' W( S8 i( a0 D5 Z! t6 g
- db(g);
4 O' d) Y. l, q. ^1 q - t.upload();
& ]: c; N3 E7 t. u9 { - ctx.setDebugInfo("rt" ,Date.now() - ti);. O$ s6 i' K5 G4 w4 c1 P
- ctx.setDebugInfo("k", k);9 m6 L/ v' e/ ~3 J& c
- ctx.setDebugInfo("sm", kk);
* m! a5 c! x4 y/ l+ p - rt = Date.now() - ti;1 O f5 {/ a }% W* i$ c B/ `5 _
- Thread.sleep(ck(rt - 1000 / fps));
9 q8 z1 [: K: o" W5 i - ctx.setDebugInfo("error", 0)
) S8 ~$ V; p) o" s! M - } catch (e) {( f( r# |% T2 r; f' d1 @& u& a
- ctx.setDebugInfo("error", e); c! k/ I" y, L! J! R ?
- }: Q6 }( Q" T! i2 b2 @: k
- }3 b, ?$ n5 p w) m) ^0 D1 _: g8 B! n
- print("Thread end:" + id);
! ^# R* l t7 h. m: } - }
5 g1 v2 Q3 B6 |, r5 R3 [! T4 p - let th = new Thread(run, "qiehuan");
( m7 p, T( `; u+ \% N - th.start();
, F4 t, V. D4 E. r/ L1 c - }
( k, Q% P# g- `6 C6 i
1 \& ^6 u# R5 K' f. S! P( y6 i- function render(ctx, state, entity) {" W$ A' _- U. i! O
- state.f.tick();
# u8 V2 Y! R; M: K- e - }- O8 G1 |( A% O
/ c; L) [1 P: i7 m5 `% a/ m- function dispose(ctx, state, entity) {
8 P l- `+ L/ h+ v. h& ` - print("Dispose");
* S, J0 }9 Q! p8 D. g% r - state.running = false;
8 X" P: z- L) a3 U) Z- g - state.f.close();
$ \2 v1 N! p0 D! g - }8 k" S+ E; I S& O5 T8 X) h! H
: V0 `$ _3 i2 G# C6 ~1 e3 w% g- function setComp(g, value) {. g( V; b1 C( z& A
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ ~0 u+ b# i$ b. z; ]9 S. L0 f
- }
复制代码
: S3 W1 u4 S- J9 m/ \. l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。5 R5 g, I+ s7 @" G; O
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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)" S$ R3 K, T' h) M7 T* ^
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