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# W1 n) ?* e e4 t
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。) W; j% K T2 r; R9 }! K$ }, i% d4 G
- importPackage (java.lang);
! @. V4 U d3 }3 o2 Q9 V - importPackage (java.awt);/ S# c( U. V* Z1 [9 f& x# y) Z
! ?* D# Z6 _- `- include(Resources.id("mtrsteamloco:library/code/face.js"));& G3 r, j2 q4 s0 \, z
- k3 u% D' n$ D1 w, m3 N# s
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) _7 m- e# E6 L& P
+ {8 b6 x" y R) [. ^- function getW(str, font) {
; j* h" k2 j9 K* E - let frc = Resources.getFontRenderContext();
1 f1 O3 t- n) y: r - bounds = font.getStringBounds(str, frc);
- ?- ~, S9 Z1 ?2 Z8 ?" }4 i. \! y - return Math.ceil(bounds.getWidth());
" A1 f! I$ x( N5 }5 y9 s% ` - }) e# u" {1 w E5 S7 }
/ h2 y8 G$ g2 @+ g; w1 D- da = (g) => {//底图绘制
: X8 \- m; t; M: } - g.setColor(Color.BLACK);
7 V# \7 ?& n4 B9 @( k) n - g.fillRect(0, 0, 400, 400);3 Y4 k# _1 p+ g$ c- @- U
- }
9 }/ J, r$ _1 d" M
- J: T8 f/ ?. g" a& l0 p- db = (g) => {//上层绘制
0 Q! O5 H) T3 A9 N9 u - g.setColor(Color.WHITE);( L" j2 Z# w7 k" u; ?- U1 u
- g.fillRect(0, 0, 400, 400);3 Y& I2 o4 b9 J
- g.setColor(Color.RED);- J- G \/ } [1 A* w! D0 K# Z/ r
- g.setFont(font0);
. q2 `3 X! L% | - let str = "晴纱是男娘";
3 R4 Y3 i1 j! i+ X6 Q8 n - let ww = 400;1 c8 t/ X: v) J1 R5 H
- let w = getW(str, font0);" z' h6 j3 J. ^- {4 y+ U6 P8 b
- g.drawString(str, ww / 2 - w / 2, 200);
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- " F# ]7 ]1 Z6 l# a( P$ X0 L
- const mat = new Matrices();- R! ^3 _2 W. p, b
- mat.translate(0, 0.5, 0);0 H& C9 |6 W6 F/ @( p- q
4 Y( { ]4 n+ Z; o' B1 [: }- function create(ctx, state, entity) {
9 F: M# s5 J5 h: K; z# e - let info = {5 J- E7 {8 S5 r3 ]0 K( z4 ^+ f8 i2 _$ F
- ctx: ctx,
3 e: S3 O- d* U/ G - isTrain: false,
% P7 l6 ~" K' W6 U! E& a1 S, q - matrices: [mat],
* [+ l3 d0 s V: j - texture: [400, 400],
; S$ x7 p" f) { - model: {( G% @2 D: n& E
- renderType: "light",8 D4 K6 Z! W1 Q& \. i$ N: e
- size: [1, 1],
& B; Z2 z! Y: H& J, F8 | - uvSize: [1, 1]
9 t' l6 x w" k+ D, U; o - }7 X) o" g( V( A3 h* {
- }+ H- C% Y0 }9 B9 g; C+ }- W, x
- let f = new Face(info);5 J( L) \* w* g, B) R: p i
- state.f = f;
4 R+ t, S1 R {$ E( y! x R
0 L; S8 t% x y7 l- let t = f.texture; }! [+ d5 E3 @% P9 d
- let g = t.graphics;
9 O# I& a( k/ a+ ?$ C - state.running = true;
# y* u5 J; H7 i9 Q z: T$ O. s - let fps = 24;
8 R% Y5 f5 O8 R) s - da(g);//绘制底图
4 V2 @" p2 t0 K9 P; k: p | - t.upload();
( @, D3 e0 p; e& ? - let k = 0;$ b3 G7 Z; j$ a& r: s( `& g
- let ti = Date.now();0 y3 }, L- e. n* k$ Q$ {/ m
- let rt = 0;
- A! X5 m+ {: Y( }1 T6 S - smooth = (k, v) => {// 平滑变化* g8 T7 a2 O" V" x
- if (v > k) return k;. v* l. ]- S [7 A
- if (k < 0) return 0;2 b# W+ }+ U, c/ E6 W: \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 t: _4 J( ?/ A$ J; N# e9 M* V& @
- }
8 X4 |& ^ I! H: l* y - run = () => {// 新线程9 j- h" g7 E# M3 T
- let id = Thread.currentThread().getId();
0 L" l7 R- x( s - print("Thread start:" + id);6 y5 [% K, r; r
- while (state.running) {' M9 x) d5 I9 j' |4 U8 h
- try {
( v( ]1 | t* q. U9 e( z& K/ { - k += (Date.now() - ti) / 1000 * 0.2;9 K1 }% [* ~+ t' j3 C9 J5 {( X
- ti = Date.now();, S8 f3 B0 n g# x! }& U
- if (k > 1.5) {0 K+ G1 |. y2 ~/ Q. C8 q. e* t3 P
- k = 0;+ R7 ^" N) S& H6 M7 K$ r
- }' ~, u5 L3 t8 ^! j6 l" W9 b: [
- setComp(g, 1);+ r$ `6 p3 Y J) c' a' W& C
- da(g);
- u& t2 Y( u o/ E8 I, f - let kk = smooth(1, k);//平滑切换透明度* u. g1 }; u& {* X1 f
- setComp(g, kk);- p) l, a4 h6 J9 i# t% G
- db(g);) T! [6 f' O b+ c
- t.upload();
* {$ g$ R4 @( C - ctx.setDebugInfo("rt" ,Date.now() - ti);( h6 o0 c. D" ^6 x D9 Q
- ctx.setDebugInfo("k", k);
' K1 R# }# `, s: X- J6 w \ - ctx.setDebugInfo("sm", kk);
' _6 `1 [/ K7 e# W, T; x% j - rt = Date.now() - ti;3 d/ J0 i ?9 ~3 @; s
- Thread.sleep(ck(rt - 1000 / fps));6 k- s" A- M# A2 j1 ]/ l7 i
- ctx.setDebugInfo("error", 0)
7 @ |5 H' x2 E3 x - } catch (e) {$ h9 v' e- Y* T% V" F
- ctx.setDebugInfo("error", e);$ K. d4 l. p/ c( t: u% f
- }
; Y2 X! {, i3 K+ t" @+ b - }7 B/ ~: h* N" I
- print("Thread end:" + id);
4 h* X% J3 l6 ?9 Z( E3 H - }
. T. e3 B; S/ @' @ - let th = new Thread(run, "qiehuan");2 _6 m) l' D3 g) f
- th.start();* Z5 ]3 J5 Y- Q. c' f% Z
- }
" _' Y( |9 z A" x8 C! Y$ C - / Z/ S U$ M, a1 |
- function render(ctx, state, entity) {
9 N' Y8 r2 y# r) o! h: Z - state.f.tick();
& O/ F1 ]9 e2 h5 D u5 K - }
# E- \$ j6 X3 ?$ |. t - # U2 C6 U* y& {& y; _
- function dispose(ctx, state, entity) {
6 J8 I4 k8 c @% B' n - print("Dispose");
/ p; M& T: |0 W: J6 Z' D* @ - state.running = false;% K- d- ~+ f( U( V: I. G
- state.f.close();: ^# j7 z9 M6 f
- }
8 B/ t" s" u# n, Z% B7 z( s w; s - ' E" f4 j5 c: n( C" D
- function setComp(g, value) {1 K) D3 D1 U* s1 a
- g.setComposite(AlphaComposite.SrcOver.derive(value));
2 q; s# _# u d& ?/ a1 | - }
复制代码
4 [/ z: O p5 E0 m' U$ P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。. W1 g, \" E( U' X
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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)3 n/ J' T( Q0 g d G/ x
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