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7 J$ X/ E0 r* Z+ c, O$ g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。; M5 |9 A: ~( D( o6 v2 s4 _1 U
- importPackage (java.lang);
9 b% W; ]3 g9 r; P4 t& c7 o - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));% {5 L5 x: s- t5 X6 ^/ V& f
) H# r; _: M3 M; n: ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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8 b( e. I9 Z* k( ~+ v* I8 P0 M. a- function getW(str, font) {& m7 Y/ [4 R5 r, n
- let frc = Resources.getFontRenderContext();
8 t# K1 y# _# ^! N& S5 z* c - bounds = font.getStringBounds(str, frc);9 [/ }6 B- _8 ], F- j3 y5 `
- return Math.ceil(bounds.getWidth());3 G3 p; Y0 z5 m# b! U4 e
- }: g! n; p7 O) @+ D
- . A$ w/ _* b# |+ {
- da = (g) => {//底图绘制7 A8 a) q" N% m5 b7 n
- g.setColor(Color.BLACK);
7 O0 D# Z: Y/ F& @4 N3 T4 o - g.fillRect(0, 0, 400, 400);
8 z H0 Z a* M6 n5 f4 V - }
3 N! z2 S1 N. k: q$ P& {
5 J% X3 t7 o8 v4 `- db = (g) => {//上层绘制
O: t; N' [2 ?+ W6 M! Y- E* L9 P - g.setColor(Color.WHITE);2 P( P6 H- Z% D, I$ C# V
- g.fillRect(0, 0, 400, 400);
) M% Z( y) k# U+ t - g.setColor(Color.RED);
: |2 R$ W! _; Z5 J& H: ^, I - g.setFont(font0);2 s5 |$ `: b' ~1 X+ R
- let str = "晴纱是男娘";
0 a- A; P6 J& u7 N) P - let ww = 400;& ]$ i. ~. Z+ r5 x3 S
- let w = getW(str, font0);
+ E1 h6 V! q1 d& d4 } N) w' A' O- C - g.drawString(str, ww / 2 - w / 2, 200);9 d: b; S$ H- C; c
- }2 M9 S" k$ n6 K
- 9 H& m. D- L6 E2 Z: Y
- const mat = new Matrices();) a/ H d( w0 g/ P& w
- mat.translate(0, 0.5, 0);
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% w3 y* { P$ S, c: M- function create(ctx, state, entity) {4 M; {0 l- Y2 n: O
- let info = {
- T+ n8 d5 z6 A- C - ctx: ctx,
p( s: r( Q- @" Z" D8 q' o' Z$ |& O+ C* h - isTrain: false,
1 j4 B7 U7 \3 O9 ~" O# H u - matrices: [mat],- |) t* N# {( C
- texture: [400, 400],- J3 K9 Q0 Z9 `! N, k% f! _
- model: {
, f- t n2 k1 D& F a2 Z - renderType: "light",
) x+ P; w3 {% F; V% y$ i/ c, w - size: [1, 1],
6 m/ u# W8 b0 G4 i - uvSize: [1, 1]
' x& v2 f8 c9 |! i - }
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- let f = new Face(info);
& G$ z& n+ s# v. ] - state.f = f;! e) X( ~2 v" v$ C. _$ _
- ! `7 r3 A7 t3 y$ s0 I
- let t = f.texture;
$ h! Y8 N* T3 U7 w F - let g = t.graphics;" \; X3 t# j$ y
- state.running = true;
% t9 E6 A: U% v7 X9 R0 `( \ C - let fps = 24;
0 r+ n$ L A6 P4 U8 a+ J - da(g);//绘制底图
6 K' N4 N( F d3 z - t.upload();2 J( ?1 k) g. ?0 q, o
- let k = 0;% m( K/ X8 Y' z# ^. U6 S
- let ti = Date.now();
2 |2 u# f8 ~% B+ t4 X: E - let rt = 0;: D; v% H3 z+ C0 T2 S: _9 i$ i" k
- smooth = (k, v) => {// 平滑变化4 |4 z6 A/ C3 l5 W$ U9 V
- if (v > k) return k;
+ I/ ]+ U X0 Z/ } { - if (k < 0) return 0;
) Q; a7 f: X) K' x) D3 K - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( {" O2 f7 t* W4 x5 N8 Z n - }
) N, p9 }/ t" m ^! k/ S - run = () => {// 新线程
2 \& s' F( o+ m5 V( T+ b - let id = Thread.currentThread().getId();' l: }+ {1 B t( _& Z/ `3 ?
- print("Thread start:" + id);" r! h L7 {7 Q, d% |
- while (state.running) {
$ I! n& L2 F) V7 V, D - try {
, w5 p) T6 K9 O( [! D" ^; C - k += (Date.now() - ti) / 1000 * 0.2;
# o5 S, l- k" |4 {6 N* c; e; G. Y - ti = Date.now();
7 w, f3 f8 I5 b& v# a - if (k > 1.5) {
M2 G o# E8 b; E - k = 0;
+ V m `$ \, Z$ X. f. U6 S2 J - }- ^, ]) N1 R0 K5 n" ]; g
- setComp(g, 1);1 H) Q9 W* i! I; Q- S- A% E! J6 r
- da(g);
$ i3 l4 L# B) E2 W: X - let kk = smooth(1, k);//平滑切换透明度
1 g1 P0 {0 A. z2 m6 Z$ n - setComp(g, kk);9 l% g8 Y o0 O8 P: N' I5 K2 d
- db(g);# ^6 f# n; b8 Q7 j
- t.upload();3 x' v9 ]' g' R: {
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! R$ H D& I3 r8 Z+ z' r( ?& U4 { - ctx.setDebugInfo("k", k);- r4 x, M# d& q0 |3 {4 a4 g
- ctx.setDebugInfo("sm", kk);5 U x$ ?- C, c# L: ?& p
- rt = Date.now() - ti;* ^2 u% K( s( L3 w
- Thread.sleep(ck(rt - 1000 / fps));
* f( r; Z4 z1 u# D - ctx.setDebugInfo("error", 0)
% W3 @) w- @$ g3 M - } catch (e) {
: a0 A) N! `: R( E - ctx.setDebugInfo("error", e);
( z8 E* N( |) F: E0 H5 H+ _& f8 s' d - }
3 ^# q4 v0 K3 y1 b$ W; x - }
+ }- w b% [9 E1 _ - print("Thread end:" + id);
2 A+ u5 P p! c" ]% y& g- t2 X3 d - }2 i) G0 f2 X( Z: f
- let th = new Thread(run, "qiehuan");1 ]; o$ d' D" c! S" }0 e
- th.start();6 O M: v( \, {% n5 c9 c8 X/ Q
- }& I& D" G6 d1 g
- 5 H8 L9 \; `; Y0 R% o# ^
- function render(ctx, state, entity) {
" a& k- U/ ]+ C( E2 [ - state.f.tick();
# P4 g# l4 E) [" k* b7 D- ^7 t - }$ i6 P# x0 I5 L
- & q7 a5 K+ F2 g
- function dispose(ctx, state, entity) {
9 b# F4 Y* Z) g, S2 F9 ^ - print("Dispose");
3 L6 G) M+ d, @" F - state.running = false;% V# Z% \! A: V3 R" ~8 o
- state.f.close();% K# x( x6 W1 h* N f! c$ b2 T$ |/ E6 t
- }
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- function setComp(g, value) {4 i( d. c; s3 n/ Z
- g.setComposite(AlphaComposite.SrcOver.derive(value));& H; u: Z. D0 Z. ^
- }
复制代码 . Y& Y8 O i0 J4 f5 A8 T; 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。( {8 E: m0 G, _4 p
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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)
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