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2 {: i# C3 P4 E! A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。
. { p' R2 ~- y! D# y6 F- importPackage (java.lang);) D& i/ K. y' V& z
- importPackage (java.awt);
/ k6 N. o* t! s2 A* B - # k0 I+ A: z% x J6 J& q
- include(Resources.id("mtrsteamloco:library/code/face.js"));8 r' ]6 D3 `9 E' ^" ?
" }/ {$ v) t& U- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 G% [; S/ \ z# s
( y& L$ \' W' l) j+ f5 `- function getW(str, font) {
+ ]" ]3 a) p' F( L9 b- q - let frc = Resources.getFontRenderContext();. ?! @* R6 _) z% ~5 { [ E' R
- bounds = font.getStringBounds(str, frc);
4 F3 p! P+ H' O: `3 a - return Math.ceil(bounds.getWidth());& l; T+ v/ }7 Y6 k8 D
- }
/ L9 V l# B3 M2 B! k
6 O1 i- ]; v* P& T- da = (g) => {//底图绘制
% ~ X2 e4 {6 g+ l6 e - g.setColor(Color.BLACK);% O1 B" D1 C4 N' z* V3 w u
- g.fillRect(0, 0, 400, 400);
: j1 _* V4 F P% J - }, z& N5 j b, ~7 [0 e4 m3 R
- 3 c* j2 O1 m# Z9 Z
- db = (g) => {//上层绘制- q( v. m, H8 k8 r* V$ C
- g.setColor(Color.WHITE);- ^9 S) E1 `$ H. n/ H& _% W0 }
- g.fillRect(0, 0, 400, 400);
; r) z; e# g) `3 b e* o - g.setColor(Color.RED);
, [# J' B; `# {# g$ T - g.setFont(font0);. H* {# Q1 H7 v$ c
- let str = "晴纱是男娘";6 \$ Q# I) t8 D2 S
- let ww = 400;0 j& a0 [$ C$ I, |, T, T \6 e
- let w = getW(str, font0);
1 G) Q' I3 `1 \4 w - g.drawString(str, ww / 2 - w / 2, 200); q$ P& r4 D+ h2 y6 [! j7 b4 }- @* G
- }
1 w! x4 k$ a2 k' h1 _* `. c9 ~5 R
" { l8 ?# t6 T3 k6 \7 u- W% Y" p- const mat = new Matrices();/ D0 |2 @+ Y8 q' d, E
- mat.translate(0, 0.5, 0);) b- W) v1 z, I4 i ~
4 G8 }0 t8 k6 z/ N8 }- function create(ctx, state, entity) {
2 g* u: y6 _7 E: s$ V8 ?) j8 D, h - let info = {- u2 k4 j5 N) n3 e
- ctx: ctx,, a6 w$ U- o' ~3 y" M. ?
- isTrain: false,9 t" \$ k4 L9 z% }) c
- matrices: [mat],
, ?# }; `" d# V9 a( w' |2 _" |4 |# j - texture: [400, 400],
, c; Q+ k1 G1 M' J0 {6 z; t - model: {8 h* u3 `' c+ l4 e3 I' V
- renderType: "light", A7 y% \+ E7 v
- size: [1, 1],
7 @9 a3 ^1 ]1 v# o: g8 c - uvSize: [1, 1]
7 u0 \) \& t. J: |6 j - }; T6 m9 s3 Z3 D; T- j4 z
- }( C+ ` J% k/ |7 S% F
- let f = new Face(info);
, _6 F# F9 U0 a+ O4 |/ E - state.f = f;
/ `' }0 F& y V) S2 ^% C- S) p
3 c# X3 f0 a7 g9 h- let t = f.texture;
4 d* ]- o1 I8 F9 D4 s - let g = t.graphics;
! X) J: D/ n9 `' m - state.running = true;
) n9 {, v: X" X8 T# y - let fps = 24;
8 ]2 a8 ~! Q, n2 E8 \4 v - da(g);//绘制底图- k; I9 g- ~9 U$ F/ ]
- t.upload();" C* i& h' L3 I, U
- let k = 0;& S! d! ~: s7 q0 n4 y; u5 d
- let ti = Date.now();
. e# v$ K( b9 e8 V - let rt = 0;( A. M ^7 c" N3 N
- smooth = (k, v) => {// 平滑变化8 r5 z$ \; G6 i; p* ^2 Q* C9 Z6 o; P8 X
- if (v > k) return k;
; K+ h% m+ w$ b0 ?' x+ l - if (k < 0) return 0;
+ B: W2 O' k( f9 _ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, d. _ n: J6 m0 g - }
5 i7 }6 K. `1 J3 v6 C! V - run = () => {// 新线程
0 f8 P2 ~, ^2 G. p1 Z - let id = Thread.currentThread().getId();) D% l2 l' G) w( [' j
- print("Thread start:" + id);& I' W( D% [% l. S4 F* L
- while (state.running) {
% d1 a% Z; d7 ]4 d - try {
( l' s2 v" ?9 w' E B$ }( P - k += (Date.now() - ti) / 1000 * 0.2;
9 g7 l- O1 _( d: p$ a0 K, F - ti = Date.now();
9 j7 t0 U( U$ C4 [( t! f - if (k > 1.5) {
8 v4 }, c @4 h, N) v0 }* g" N - k = 0;, G; n& o* ^" F# }
- }+ c8 P7 x: l' u" d; s& D
- setComp(g, 1);* s& m# F' P8 k- N4 L6 y. [
- da(g);' y2 M' @- i6 E! [6 a
- let kk = smooth(1, k);//平滑切换透明度
8 ~8 U. J7 J; e" ` l' K - setComp(g, kk);2 s0 B8 T4 R/ r' N$ `5 x9 k P, P
- db(g);
2 S! K/ Y0 `1 t9 l9 x, {. C3 p - t.upload();$ d1 J& Y) d2 t2 ?
- ctx.setDebugInfo("rt" ,Date.now() - ti);% C, H$ ^/ h4 @% ]
- ctx.setDebugInfo("k", k);
3 X3 y7 Z' z/ \7 O- M7 x - ctx.setDebugInfo("sm", kk);
# W3 s/ C/ U$ f - rt = Date.now() - ti;1 |/ ~/ I' O. F( B( c" G- _3 A) s
- Thread.sleep(ck(rt - 1000 / fps));# M' B5 ?$ r+ o; i3 P& ^) O6 m* s' @
- ctx.setDebugInfo("error", 0)
/ f( F( o; ?$ b, S4 [7 k, V2 ` - } catch (e) {2 `' Z" \7 d# v" X
- ctx.setDebugInfo("error", e);, l" o8 m; a2 H5 k/ x3 ]
- }; K- ^% s) q( O, O
- }
/ e6 D, v, Z) x; G+ M, s# { - print("Thread end:" + id);
/ d) L; ^$ q1 q1 b& q0 t. B& \7 c3 w - }
/ ^2 H* ]2 w) G& x( g7 p - let th = new Thread(run, "qiehuan");
1 `9 k6 b2 \" | - th.start();5 M. n7 f1 f+ e5 h9 r6 Z5 F
- }. @& W( _; Z. w! `
- 7 K* h- I7 A- C: b
- function render(ctx, state, entity) {
. A/ R8 K- M6 u8 Y - state.f.tick();
1 B4 @) b/ e p. Y# {+ F - }7 z% N, i' }1 X
8 c3 V3 I# P! n; }% z- function dispose(ctx, state, entity) {
# o- S; Q2 o7 _3 F7 h" | - print("Dispose");
O" s! N: j9 q% F - state.running = false;
# G% D" T6 u* @. P a - state.f.close();0 x b/ t l* Z' T; ~* ~
- }- c( n1 j m+ U9 ]6 Z% u
- 2 ?) G, m2 O8 t/ r) k7 P+ d
- function setComp(g, value) {
6 }) j! T; H" j N$ |5 t5 Q - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 {6 ]8 [6 p0 i) t - }
复制代码
2 P8 i( G$ ^/ v& 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。
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5 C F# q/ D$ _7 g7 t
5 f c5 T2 ?7 m/ X8 g; K顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% @% G5 h T# f3 F" {; {8 I
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