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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。* [/ I, A2 n; ^, c8 C
- importPackage (java.lang);/ c. P" v- R# K- f8 H- A; d1 ~9 p( l
- importPackage (java.awt);" I) W. E6 O. y+ s& h$ ]
- - e1 o" U* n; g+ L
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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9 e! E1 d2 @4 D4 {" h2 M5 x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* E$ V" I D2 J2 ? - 9 f" Q4 n# y& v5 f5 v. V
- function getW(str, font) {
. x- u% H& x+ p - let frc = Resources.getFontRenderContext();
* \+ u% l# v5 H7 U7 z( Q$ Z- L4 k - bounds = font.getStringBounds(str, frc);& ], X' s7 V$ e6 X1 W
- return Math.ceil(bounds.getWidth());. n/ L) B. m" F% I
- }* ^* U( W. d6 B; i. Z9 ^6 a
. D) {# v/ g$ L0 h+ u+ Y- da = (g) => {//底图绘制# a4 f4 u3 v. t
- g.setColor(Color.BLACK);; r4 c1 E+ {0 W! ]0 a$ {2 H P4 L
- g.fillRect(0, 0, 400, 400);2 H3 x0 g6 a" ~# _+ g9 m
- }
_3 g9 ]% x0 P6 V1 L9 r3 |- O
/ D. Z- ]$ S# b- db = (g) => {//上层绘制( V7 R9 B; H/ C) P8 U/ Y7 B' D+ k
- g.setColor(Color.WHITE);
9 F& V- D9 t9 R: I$ d$ r9 E, P - g.fillRect(0, 0, 400, 400);
; w$ J) f2 Z$ ^ - g.setColor(Color.RED);
9 H( K( C$ ~, B - g.setFont(font0);
) {& A, @4 Z( x# M# N# J - let str = "晴纱是男娘";
& ?+ W g2 _1 `" }) F! O - let ww = 400;0 y+ t* K( b; P$ ]( J
- let w = getW(str, font0);
% k* }/ d8 p/ j3 x: Z6 Y+ s B4 ^ - g.drawString(str, ww / 2 - w / 2, 200);: K) j# R/ E$ H4 F+ q2 ]
- }! D3 t% N: {; }7 m; u) V
- * k! I4 d' \+ b3 T
- const mat = new Matrices();4 J i% `- d% D
- mat.translate(0, 0.5, 0);/ |+ s, b$ q3 r
- ) s2 E, Y: A2 u
- function create(ctx, state, entity) {
6 J9 h# d' Z6 Z) a+ B. X# l! A - let info = {
+ Y. V A. k* d6 k! H9 N/ I$ b - ctx: ctx,2 }* K& Q2 L# }' T# K2 p
- isTrain: false,
( q0 Y. M" b7 d - matrices: [mat],/ I8 b" E2 F& G& ]" v
- texture: [400, 400],5 j: S" O% N1 {
- model: {+ e, j3 n9 ?! Y5 B! T+ v
- renderType: "light",
: |5 s `& ~8 }4 M& L) k7 Q - size: [1, 1],1 f. B3 J1 x+ m! o0 c
- uvSize: [1, 1]
, a4 L* M- f- T) e, U2 x - }
D2 f" x0 W9 }7 J4 {' H+ [* n+ { - }% s: O4 G4 h+ Q: \; Z
- let f = new Face(info);6 ?8 F! Y# y8 V6 r" {; ?( ~7 P% T: `
- state.f = f;
6 U! N! S$ U* P$ j/ ^6 r - . T% n7 A( w0 Y; l0 [6 y
- let t = f.texture;1 `, r% e8 U" d
- let g = t.graphics;
) _3 y$ B# B9 L4 W& E5 A - state.running = true;0 u. T8 Y, p: ^& R: G
- let fps = 24;
9 p8 S. N6 N6 o" Z- e, ]+ ] - da(g);//绘制底图
8 h/ q0 ~/ f* B( }' j6 Z. r( c - t.upload();& P* v0 d7 h- k. c9 \# v
- let k = 0;
9 c( u1 E7 j$ \ - let ti = Date.now();+ @! Z: A( o# R7 L
- let rt = 0;
) Q3 t% ]7 A' X* y& S- u N - smooth = (k, v) => {// 平滑变化
4 W& C8 W# L( |0 O: [+ N6 B. R - if (v > k) return k;4 l2 l2 L1 V. `
- if (k < 0) return 0;( W" A6 _1 _" Y( K. H2 r
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 o* g" g5 H. n+ l - }, V! W' F) w" L0 D. w0 T7 X w
- run = () => {// 新线程1 {( w& w) T: k$ B# ~
- let id = Thread.currentThread().getId();
) r y4 v( e. \/ n - print("Thread start:" + id);
) V" G" L- \' l# l3 Z0 Y M4 j% A - while (state.running) {+ \9 t7 l* g, F' C% U( x
- try {
: u; t, \' w; L! z+ ~4 p - k += (Date.now() - ti) / 1000 * 0.2;
o+ Z! l& U1 Y6 c3 |3 l9 v - ti = Date.now();; N5 Q6 q4 q" M/ [5 H
- if (k > 1.5) {
0 v- l; h, P% b" f3 W - k = 0;
4 h: L8 f( T4 D6 F( N - }/ z/ I% H( `. C, f$ K; M: K& {
- setComp(g, 1);% u# A, W' I/ B* X
- da(g);
- h: X3 N7 y/ v4 g u7 p - let kk = smooth(1, k);//平滑切换透明度
5 M% Q8 a7 l6 z - setComp(g, kk);- H1 @! |9 ?+ _# t
- db(g);
( h7 x: j2 P% P" I( i/ c - t.upload();2 @# i! E# {/ V6 z& w/ _
- ctx.setDebugInfo("rt" ,Date.now() - ti);# A/ m$ r5 o5 e/ z2 t
- ctx.setDebugInfo("k", k);
/ l2 f" k5 `" n% s" M - ctx.setDebugInfo("sm", kk);
0 Q. V0 t7 k) i3 K5 e( ?' ] - rt = Date.now() - ti;0 Z' B$ N3 Q1 s3 J4 S& D1 ]
- Thread.sleep(ck(rt - 1000 / fps));7 g h4 h; k! S- O7 \# _
- ctx.setDebugInfo("error", 0)0 @3 }4 E. N3 P0 L4 z
- } catch (e) {% H* b$ r) u, m0 |: ]8 f& U
- ctx.setDebugInfo("error", e);, S ]$ N `* f4 l2 X. p& a) A
- } g2 Z. [# P; | H9 }& k5 H5 G
- }
) l" j7 k9 l" ] i - print("Thread end:" + id);
4 j7 v% j8 s, o- u5 ]. j* b! ~ - }
, P: W7 ]$ v& M& h - let th = new Thread(run, "qiehuan"); M# p& n6 Y' A+ ~
- th.start();
4 B$ \, s3 N5 Y - }
$ a1 g1 i, C# f- \7 }
3 B# A6 A$ B" I/ S- function render(ctx, state, entity) {
3 h9 O! z" H" [8 E+ [ - state.f.tick();$ K" G6 V8 Z S$ V6 |7 q" M$ }. A
- }0 C; J" j. ^6 P) y
- " I/ \- G* x4 T- \
- function dispose(ctx, state, entity) {) e# r- B k/ Q @, _4 u
- print("Dispose");
1 C7 E5 Y% |$ z! A - state.running = false;
& m; {6 ?/ A( J - state.f.close();! J) E0 S9 F6 E" A- n
- }
: U: ~" L) `2 [0 F3 y! a/ |3 p
: Y0 z1 v9 O( O1 R$ k! k- function setComp(g, value) {' Y+ N! w; ^: \/ G+ s/ F) A
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" P1 D: i! w: f; c - }
复制代码 6 [: ?3 O8 G( }2 G! H
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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( S) e8 T, R6 ]+ k) J2 c顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), f( ~. j4 Y! b0 v: \4 w% _( N& e
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