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: O4 Q* v) A g6 [0 y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。; ~7 D" U. E5 H. [
- importPackage (java.lang);- @6 b1 N1 [; @% V, r' [& \1 ^( u* Z: Z
- importPackage (java.awt);0 {) u% B9 q4 r/ c1 x; J* B2 B% Y8 V
* _: E @1 l; V6 X& y- include(Resources.id("mtrsteamloco:library/code/face.js"));
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% p5 a# R) i, y% z7 K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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; P& Q% V3 V" M, L4 F- function getW(str, font) {$ s- T! x" o6 P) B3 t, O
- let frc = Resources.getFontRenderContext();3 U8 E: D- d% x5 Y+ T
- bounds = font.getStringBounds(str, frc);
. f9 a* M. @+ u4 c - return Math.ceil(bounds.getWidth());
0 k+ v: q, J- D: ]& G/ P - }
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5 o: k# @2 K9 C0 T4 v0 ?- da = (g) => {//底图绘制5 j0 `/ E0 m2 p9 x9 u
- g.setColor(Color.BLACK);" l" M1 V6 N9 s5 S' K
- g.fillRect(0, 0, 400, 400); D. \) ?1 q7 ~& H2 w6 t
- }6 z v9 C5 w& Q
- 4 v9 I/ A) {2 k. o( L: f- E) E; [1 Z
- db = (g) => {//上层绘制* g$ U$ O- K' I0 z( X' T
- g.setColor(Color.WHITE);4 j/ N' I( q2 v7 x
- g.fillRect(0, 0, 400, 400);9 [+ U; D3 g- y. o0 ~5 J- B' F8 U
- g.setColor(Color.RED);' ], V" }2 t) h) z
- g.setFont(font0);, U7 M3 U; T* M6 C- w7 ]
- let str = "晴纱是男娘";4 v$ ~1 }8 y; w5 J% l! j
- let ww = 400;' f4 E& `6 F" e! e
- let w = getW(str, font0);
1 K1 R( H% v1 a/ `$ } x - g.drawString(str, ww / 2 - w / 2, 200);
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4 b" p N- c* B4 e) E- const mat = new Matrices();; d0 \ e2 e% x, d: t/ J& `8 O
- mat.translate(0, 0.5, 0);. L" X! N9 I+ W: g2 A" u& _" e5 `3 H! A. @
, D4 W$ g Z3 k0 u) W3 z- function create(ctx, state, entity) {
' T3 @. T f/ i1 H+ ?8 X - let info = {
" w1 U8 n( Y0 t# D - ctx: ctx,' ~6 h+ l6 k# m: L
- isTrain: false,$ h' i1 {* U4 f4 [" S
- matrices: [mat],
' m3 ?- T) z& L5 S. i9 G( @$ e - texture: [400, 400],. K3 u* j: U' ` J" i. [% }' p# t
- model: {
% M& @+ R/ q& G3 ^5 v; ~ - renderType: "light",8 C ^& J+ a% ~6 m! i+ C; J# v! n0 T
- size: [1, 1],
! s7 q% T+ _$ Z2 J# y# a' E - uvSize: [1, 1]
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- }
1 x. t! A( T/ }# W. A6 E - let f = new Face(info);3 I: ?+ n" C1 p
- state.f = f;/ r1 z+ I/ g- K+ @- X; o
1 A# m( x3 _. e- H0 f- let t = f.texture;
9 q7 C# u c6 D3 j1 C+ H4 U - let g = t.graphics;; \' \ @3 H* N7 r* c8 C
- state.running = true;9 J V! h/ A) l* K( a/ I
- let fps = 24;9 F! _; T$ ~: s) R. p8 a
- da(g);//绘制底图
/ _) k3 A+ j; w - t.upload();
& g9 t6 T' ]$ t2 G# ]% u& I - let k = 0;
* ~9 `5 W+ Q' J1 T$ c7 M a* J - let ti = Date.now();& a5 ~- U8 `; v& b
- let rt = 0;
" |! W* a) ^4 W/ e. x. Y - smooth = (k, v) => {// 平滑变化
! h' y5 O+ a8 M" o2 m4 @1 {2 a4 D - if (v > k) return k;8 r6 z( n- u* Q+ v* S4 D$ O- X
- if (k < 0) return 0;
, q5 w9 R$ \2 V, M% l: w( R, O - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
/ j' [" Z% o3 F, K, W% w - let id = Thread.currentThread().getId();1 E+ S$ X" H% U3 z; K
- print("Thread start:" + id);
% N6 I9 z+ b/ P! L& t1 O# n - while (state.running) {+ {# Y3 T4 l% ?
- try {
: b8 ]& ~# D. h. {: ? - k += (Date.now() - ti) / 1000 * 0.2;9 F" d2 @! |, Y0 T5 y) T% F
- ti = Date.now();
8 h! T% m4 R, N4 p* K - if (k > 1.5) {: a- |7 x, C! t4 e- n: _
- k = 0;
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- setComp(g, 1);
0 F/ s7 {+ `- @8 R$ P# |: J - da(g);
8 k2 H+ a. i/ o/ h - let kk = smooth(1, k);//平滑切换透明度/ E' b! g* R1 u, ?9 e
- setComp(g, kk);
0 p0 j/ [. M0 Y# t - db(g);2 j0 `; q/ j# G# z
- t.upload();
, U7 Q; G& ~/ G: u1 u, V - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 f8 A3 W% x, g/ C* k - ctx.setDebugInfo("k", k);
4 o& z* g3 J& R3 d - ctx.setDebugInfo("sm", kk); g. G2 s) i/ o) B+ P8 d
- rt = Date.now() - ti;5 U7 |% H" g" ~6 u" n
- Thread.sleep(ck(rt - 1000 / fps));
/ l- L4 M! p! Y3 R3 A, g - ctx.setDebugInfo("error", 0)6 ?9 W' y' v D4 ?
- } catch (e) {
8 R P z& G4 `$ f/ ` - ctx.setDebugInfo("error", e);
' F$ ?3 |% ]0 B" g$ d; m - }
3 j2 z" }. Q* w4 r& i* B$ I6 P+ q - }
9 m) k: ^# A, M# _$ U - print("Thread end:" + id);: f7 @! x K" c) c5 H
- }& {& V" ], {, V0 `- m& w
- let th = new Thread(run, "qiehuan");) Q# ` C' l- H7 q% c
- th.start();
+ l, J9 T A5 X7 m3 k3 d1 Y - }
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- function render(ctx, state, entity) {8 S9 B/ I7 |& w) K
- state.f.tick();- g- K, C5 ]; n2 x% G7 q$ ?
- }
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- function dispose(ctx, state, entity) {& X5 f/ B3 C2 d1 X- @) [
- print("Dispose");
" q7 H+ w! B1 X' t - state.running = false;9 g5 u; v) ^5 J- T( @6 o
- state.f.close();5 z, s' h+ v( _5 _& ?, u
- }5 S& C- N. Z# `4 U3 p
8 c5 N1 q0 X l6 d C- function setComp(g, value) {. I$ S( x2 `, [5 F u& `
- g.setComposite(AlphaComposite.SrcOver.derive(value));
, w$ f. O$ L* O - }
复制代码 & J! D) l; a/ a* e8 J- e
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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e: ~; b& p) b/ r! @' x1 ?8 s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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