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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。
8 e! x3 s6 {: P1 I- importPackage (java.lang);
' S5 `; j$ v+ d8 T% y - importPackage (java.awt);9 s* B, @" q$ o
- / p4 b. t. u/ n& Z$ e( p: z
- include(Resources.id("mtrsteamloco:library/code/face.js"));. A5 n& W/ v; u2 g
& N* f/ n# S1 X6 u- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: E: {- S+ e3 J3 K: i
" \1 R5 t& G( _! I- function getW(str, font) {8 P5 }$ }5 c) p% b9 D# h2 H
- let frc = Resources.getFontRenderContext();8 G6 L4 Z0 _1 M5 ] n
- bounds = font.getStringBounds(str, frc);
7 O7 n s+ z* J9 C' O2 N - return Math.ceil(bounds.getWidth());# k6 Y. U/ f% |+ ]4 I' H# O& P
- }
, @! }5 U; |6 p5 R; I o - + L, G3 ]) N! N3 ]3 p& ^5 A- W
- da = (g) => {//底图绘制
' W1 h, V- s' g% ] - g.setColor(Color.BLACK);
0 o* E' q% e1 T - g.fillRect(0, 0, 400, 400);$ Y. Y- Z, s: {4 d
- }
* x/ ?* K0 P( Q& q
1 A1 U* H7 B5 k6 p) O- db = (g) => {//上层绘制6 i, U$ w6 I/ b
- g.setColor(Color.WHITE);
6 t8 h% D! z0 O. J9 r - g.fillRect(0, 0, 400, 400);3 n+ [4 g. w. g) b4 A8 L
- g.setColor(Color.RED);
: L1 X+ r! @: H- ~" o" x9 c% @& A* Z - g.setFont(font0);. ^( x8 H/ w( y4 w4 F5 A% v j
- let str = "晴纱是男娘";6 N0 s. ^- Q2 f* V" j
- let ww = 400;9 q& y& r1 ]* }! n
- let w = getW(str, font0);4 u% g- t& ?# M& ~; Z
- g.drawString(str, ww / 2 - w / 2, 200);
& u2 e, m& Z+ ~) m - }- l2 p* K1 t5 p% I& \2 [
- 5 k7 @1 W8 k, h/ r2 O
- const mat = new Matrices();
0 E, N4 y) P6 q: G, r! \ - mat.translate(0, 0.5, 0);- i3 s& [. P& f$ E' k! I- m( |
7 v9 h6 L1 }, p5 v7 S! `- function create(ctx, state, entity) {. }/ z) G0 H3 Y& r/ p
- let info = {* l/ F' \% p4 K( \, C
- ctx: ctx,- L- g9 c6 R! r# L+ I+ q u: B1 ^
- isTrain: false,* f' v/ F$ z3 P0 l! p6 J
- matrices: [mat],+ f9 ~4 A2 G% C( d# D) P. D- L
- texture: [400, 400],: Z/ I3 O# X+ M5 N% y5 y, J
- model: {
+ t' i5 a C9 K1 X - renderType: "light",2 j1 h0 K# C# v- B' |5 ~
- size: [1, 1],
0 W: M; g! E S h8 w ]- ~- _ - uvSize: [1, 1]
4 x" ^2 j8 O& ~+ q# y' } - }+ S' B. ]( } W, |
- }3 e, b# K' S: P- R/ S
- let f = new Face(info);
( ^9 z% Z7 M: A% \0 M k, O% P - state.f = f;) P& X5 M# K& T9 w, U2 W8 S
/ F, y# G6 b0 v( T+ v/ _. `5 s, G- let t = f.texture;! C& K+ I- _5 o' ?4 N. Y
- let g = t.graphics;8 m) D; Q) G% h7 Y7 N) r! s
- state.running = true;
G0 c1 `- z/ `$ F |5 b, T% \ - let fps = 24;! u+ `! F- z% A6 n8 O7 ?4 L
- da(g);//绘制底图
5 ~& C6 q0 I+ D6 W) w1 B% h C - t.upload();
) d$ E/ B8 x% G! i0 q - let k = 0;, D' ?2 k2 R0 b/ I
- let ti = Date.now();
! Z: i* \8 l* Q Q/ ^" ]8 e - let rt = 0;$ C+ O% X6 i4 n$ U
- smooth = (k, v) => {// 平滑变化% }4 q E' B# k7 {" h. e
- if (v > k) return k;0 l$ r; H0 o+ U( a8 @
- if (k < 0) return 0;1 L6 t9 A* y, |- a
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 y: M! g. w) x - }4 d I; Q% u: @- P% k8 H
- run = () => {// 新线程
7 F& U. S3 \% a2 n5 Q) F - let id = Thread.currentThread().getId();5 s9 c# X9 P& |* c
- print("Thread start:" + id);
2 G) f2 \6 t! G9 T5 ^3 ] - while (state.running) {% \0 H0 a- R; c( A$ d* M$ T5 u; P
- try {- I9 O2 T7 J. t; r1 N4 {
- k += (Date.now() - ti) / 1000 * 0.2;5 |2 j, W! _1 J$ h; E
- ti = Date.now();, |+ F. [$ v1 u$ Q; y1 k
- if (k > 1.5) {
( h# W. h: i( x4 q - k = 0;' l$ _5 l3 }9 y! z
- }, ^0 b# \# W" j( h/ t( q
- setComp(g, 1);
% c& T& `% T+ f6 F& f/ P8 g - da(g);
; \ Y, @" J3 ?- _2 `4 V - let kk = smooth(1, k);//平滑切换透明度+ F0 w0 z% r' q2 ^
- setComp(g, kk);8 z" _1 o/ `% M6 |! o; @2 n7 a
- db(g);0 g3 ]7 W( V5 z: d
- t.upload();6 j0 K6 D+ [6 h; i& F
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! }( r* H7 U% m* d/ `4 i - ctx.setDebugInfo("k", k);
2 P" Q1 Z2 p6 }- c6 z - ctx.setDebugInfo("sm", kk);& Z; j- O' b: {) t
- rt = Date.now() - ti;
3 i E( I3 A& N% W& { - Thread.sleep(ck(rt - 1000 / fps));
% V K' y, [2 e' p! V- U) Y - ctx.setDebugInfo("error", 0)
h2 y5 q: Z( K4 O" C6 C - } catch (e) { ^) R X5 }+ i7 S5 ~' k4 q
- ctx.setDebugInfo("error", e);* S) X/ I Z' O) [' i2 d5 f+ C
- }4 T( |+ c* [3 `/ R, L
- }
" Z- y' X! D! O& F: B - print("Thread end:" + id);8 I4 j) Z- ^4 ^5 c% n6 K
- }
$ R# e5 I, s U+ n - let th = new Thread(run, "qiehuan");
: g0 X, u9 ?$ {- [0 h0 W - th.start();# D3 w: E9 T2 j2 }, }/ A7 V
- }
0 ^* x( I' m# ~+ e" o - : M, U% z/ `7 D. G0 t; Z$ X1 k
- function render(ctx, state, entity) {/ J L6 F/ q9 Z L! }* {$ M
- state.f.tick();
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- - u' g( d: l0 Q8 | w% o2 V; H
- function dispose(ctx, state, entity) {$ `( n8 h+ W. m
- print("Dispose");' d* F4 V+ n! u7 W+ ^, e! `
- state.running = false;
# ~3 L+ {1 p2 N% j2 ^ - state.f.close();
7 N5 I t& t: ], a7 q9 ?: M* r) s - }
: _8 y& I# a4 G; O( _" u# w1 V
" M$ i+ ?( H7 y/ e1 E' S9 u- function setComp(g, value) {- D+ W' S. c( D' @0 x$ ?. _
- g.setComposite(AlphaComposite.SrcOver.derive(value));8 s1 I0 z/ N/ p0 x
- }
复制代码
& v1 _. Y+ M& Y# i3 B: m3 x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。" Z& ^$ E% n: l4 L$ H& u& @ K/ [
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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)! S9 m! w1 L. e, T& d
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