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$ r0 E4 }3 r8 c% m; X) c( z4 m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。, l% l3 }+ h% l) B, W; E! L# ^
- importPackage (java.lang);
) X' k2 w- b% J) z5 c$ @3 g* D8 }# Y - importPackage (java.awt);
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. q" h3 G7 \2 Z: L! N r- include(Resources.id("mtrsteamloco:library/code/face.js"));4 W$ g- ]: Q6 {- y! ]" Q3 G
9 k# X& ~. y/ U& A$ m- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 q; a4 U" G0 V* \
4 _8 Z7 [; H/ m" X# a9 j- function getW(str, font) {
4 F. V- B! ]0 a2 f - let frc = Resources.getFontRenderContext();
4 ^: R! }+ x! d/ E - bounds = font.getStringBounds(str, frc);
- b ]. e1 p! }; P$ z$ w$ V# } - return Math.ceil(bounds.getWidth());
" I) T S! @# e6 X# h6 q$ d) Y - }
% K, D0 G* w( t1 C% u( x' l
$ Y) m2 A& S6 P e) O* p* i- da = (g) => {//底图绘制
. S+ W$ s: b: d5 X5 E9 u9 X - g.setColor(Color.BLACK);
/ ], P2 A' s }; K0 j - g.fillRect(0, 0, 400, 400);8 O( m9 u4 ?( O0 k
- }
. Z* f2 P* n4 `1 A
0 j& t6 `& H6 B x- db = (g) => {//上层绘制
# d% H. f* p# W$ x3 o4 W - g.setColor(Color.WHITE);
; x; s# U3 w6 d - g.fillRect(0, 0, 400, 400);1 N- H3 s, Q Z5 J" |) d- e' D
- g.setColor(Color.RED);
# `( E2 b. y x; c - g.setFont(font0);: G; r9 L9 i n/ q! T3 J* [
- let str = "晴纱是男娘";
2 T2 D6 |( l; u W: [) T3 y6 J/ K3 i; q# G+ J - let ww = 400;
) O$ \$ f) t: M5 Q - let w = getW(str, font0);. }7 K5 g3 I5 [, x0 V# V1 {
- g.drawString(str, ww / 2 - w / 2, 200);
. X3 a* ]9 @" E7 E - }
3 T: U3 E: F+ a, @# u; I, \
9 w5 Q" @9 _# Q( m l m- const mat = new Matrices();2 R: K0 ` e( t7 p8 D: Y
- mat.translate(0, 0.5, 0); @* Y9 u& _5 p7 ?" I) ]$ P
+ I& x% Q# ~/ r: ]" F/ _9 O- function create(ctx, state, entity) {+ O4 }$ K) R, j" Z8 V
- let info = {6 e% @' k4 G' S" @6 _7 y
- ctx: ctx,
y* ~: g& U8 Y6 z9 \ - isTrain: false,/ j2 l- r4 {0 i6 A/ d
- matrices: [mat],
" w6 [1 M' }# z! G* r. H% ^# j - texture: [400, 400],
3 s" s$ _* m* N - model: {
/ k4 F" T' s/ ~. X - renderType: "light",2 Y! ?3 [* } Q
- size: [1, 1],2 e$ ^2 k: b8 S$ o+ Z
- uvSize: [1, 1]
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- }& D1 f% t' U1 H6 E5 V" x8 z+ O6 U
- let f = new Face(info);! E/ q8 v- E* u" W9 V: l- G* |
- state.f = f;
' }% \5 a) y, Q - / q3 C! S4 v; ~+ @& s8 |
- let t = f.texture;" S, u7 ^6 t, Y9 j2 K# o0 t3 `
- let g = t.graphics;" O7 C; N2 M3 |) T( z
- state.running = true;
; e. r5 _# d' m( U0 X6 D# o, } - let fps = 24;
# l2 x9 D$ P9 h3 z2 t" b2 H - da(g);//绘制底图
( O( B, r" s" ^ - t.upload();
: ~. a$ i4 f. E$ p - let k = 0;
/ w$ ?) K1 Y6 Q4 A' y3 t% ]9 a - let ti = Date.now();
/ o2 {: H0 Z R5 _8 }& C - let rt = 0;
$ s6 ?7 J3 ?5 l+ V' Q8 ]3 O - smooth = (k, v) => {// 平滑变化8 Z( E- U9 ^: v: m
- if (v > k) return k; Y5 d, [% a/ w% g
- if (k < 0) return 0;/ U8 \! M/ y# \. q- n" V3 W+ u/ K
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. [; K( n+ F w N$ O3 [1 {0 X, C
- }
: r" R4 g& A9 Q$ g& k3 Y( C - run = () => {// 新线程5 }- A- O! H$ W* g- a
- let id = Thread.currentThread().getId();0 ~6 Y7 c/ n5 u$ \! r( k+ [
- print("Thread start:" + id);
( s8 ^! c8 B/ R! z( s - while (state.running) {+ m9 l. k1 x4 }5 g9 ^9 n" R! x/ v
- try {
; M A/ S- `; C/ K( D - k += (Date.now() - ti) / 1000 * 0.2;+ }( S/ c9 R* H& f; S- q
- ti = Date.now();7 `; L* Z. M$ L; J0 ~9 A
- if (k > 1.5) {$ v7 d, q) b, V; j ~
- k = 0;
1 f9 ]8 t! h2 n. v - }1 K( b$ v+ o$ T3 n5 M/ u w+ C: ^
- setComp(g, 1);
7 X, s* y- {% h; H - da(g);; w% i* Q" X4 X3 k( a
- let kk = smooth(1, k);//平滑切换透明度0 W6 ^1 V8 C: G0 h7 c+ D
- setComp(g, kk);; T4 y- e6 v4 a& S5 j* h' A
- db(g);0 m5 R! p& q# F1 G& i+ C( b" U" A
- t.upload();5 N, O* D7 j3 }. x9 t& p8 u
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& q# }- @/ c4 c - ctx.setDebugInfo("k", k);
x0 l" e) O7 H( V) N - ctx.setDebugInfo("sm", kk);
- Q1 k! K( B/ q; S - rt = Date.now() - ti;; j$ a) g; p4 c
- Thread.sleep(ck(rt - 1000 / fps));$ w% u1 U* ]' D/ m
- ctx.setDebugInfo("error", 0)' f3 h: n9 f0 c
- } catch (e) {
. q, l- q n! I6 ~ - ctx.setDebugInfo("error", e);. l9 ?5 k/ M- T3 \
- }
' E8 O) q/ G* h6 M6 N - }" b/ b6 L6 Z G$ j
- print("Thread end:" + id);
( E9 q) Z! R6 O" N4 k6 Q% @5 X - }, h( h. A% ?" G7 T+ N6 [3 Z% j6 g
- let th = new Thread(run, "qiehuan");1 X! ]( `9 I. u# z* ~
- th.start();* z2 d5 u7 R! N
- }; O# \% @# {5 G& O4 _
- ! w9 ?% C2 W2 H8 s0 [+ L
- function render(ctx, state, entity) {
" v3 n: G, e/ q9 k - state.f.tick();. H$ k: b/ e1 x: b) X6 {
- }% A4 A0 h0 y5 I9 o
) s: E) e# h/ x' \- function dispose(ctx, state, entity) {5 F$ o" v2 {' v t5 k
- print("Dispose");5 Q5 O) y0 ]( ~+ O" `
- state.running = false;. n; [% r! R4 G7 w
- state.f.close();- N$ g" T- |. J& q2 X5 k* _
- }
d5 b' k0 O0 F" F& z - 5 k; D! m7 `: s1 M
- function setComp(g, value) {6 f8 @6 ^( }& y9 a( y& a
- g.setComposite(AlphaComposite.SrcOver.derive(value));- x# I3 {& H2 l7 a5 O& U
- }
复制代码 ! {2 L( q/ r5 K+ Q( v
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) j4 e/ V4 o! c$ K, u/ r
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