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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。
2 @* m9 _4 V; ^( u# V& e& j( i- importPackage (java.lang);: W/ T5 x6 E- W3 \! z
- importPackage (java.awt);
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X- n4 B9 K8 q6 V! o4 v- include(Resources.id("mtrsteamloco:library/code/face.js"));
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& J. V) C0 | Q" P, t- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. D6 D9 i' b$ d) ]1 q9 X% d
- 6 v7 Y# N, O" ?+ m K. L5 E7 n% t' d
- function getW(str, font) {
n+ @4 |9 i0 K8 k( r' n' ~3 U - let frc = Resources.getFontRenderContext();
0 m5 b3 j6 o, U4 z0 r9 Q - bounds = font.getStringBounds(str, frc);
5 L1 L5 G) \3 V) G. f: l; Y - return Math.ceil(bounds.getWidth());
% P$ |! {4 ]* |3 ?; K! o0 _0 m - }
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- da = (g) => {//底图绘制
5 _- `, b- _& p/ ?5 P - g.setColor(Color.BLACK);& z& r9 `! B. M0 E
- g.fillRect(0, 0, 400, 400);
" s, O9 q5 e' t* H9 Z) B1 r: X - }
# l# i( a7 u* I( t/ c+ Q1 j0 r - " j6 v" ?7 E4 E3 z. U5 ^* {
- db = (g) => {//上层绘制# J' [; Z; U, X2 s* O' w2 d$ N
- g.setColor(Color.WHITE);
. l7 G* o6 J8 U9 C7 Q- V - g.fillRect(0, 0, 400, 400);' D( E" k9 D5 h! @
- g.setColor(Color.RED);: ]" x. ]1 P+ k4 F: n* x& n
- g.setFont(font0);
/ x0 f" V2 y/ h - let str = "晴纱是男娘";( ~! D. i, T; j) d& ]
- let ww = 400;! R; B. ]; I4 Z+ q+ o) X' h' M4 Q8 q
- let w = getW(str, font0);
3 Q O, Y% w, c1 V - g.drawString(str, ww / 2 - w / 2, 200);; P7 @! g3 P& {8 ^# _6 z5 Y2 p
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- const mat = new Matrices();7 F! ^+ _/ c/ N% Z; `# [8 D8 l
- mat.translate(0, 0.5, 0);( ^! J9 W% `8 O
$ P! Z+ G- S. j) C- function create(ctx, state, entity) {
% t$ q: ~4 M' ? - let info = {! n* k x, k8 W% n; T* C
- ctx: ctx,! J6 k3 @0 M/ R
- isTrain: false,
; _6 ]" Q" q5 Z5 m7 w - matrices: [mat],, |. b# r" f, I* b% K/ Y
- texture: [400, 400],' ~+ \3 U3 T V$ k" x2 a* ^# R
- model: {+ {# J% Y Y' ?9 q/ K
- renderType: "light",7 H& ^% q# A' @& @
- size: [1, 1],
# W1 F! c! }5 |) R( j% e8 E - uvSize: [1, 1]
: c2 |) v% O- Z( D; n6 l8 i - }
9 u0 B9 o6 Q% X7 y6 S - }
: a8 l6 B$ j8 w( \& w - let f = new Face(info);
0 E9 [+ Q9 y6 v! Z - state.f = f;' I) B6 Y! \+ b( `8 ~ p
C) d: w3 [6 Z' v- let t = f.texture;6 e1 Q: C& q% d- |9 t
- let g = t.graphics;
6 S2 e" B* {: F) T7 s" q - state.running = true;1 b( X( m# t) H% O
- let fps = 24;
& k0 o1 s& Y' [' b' Y - da(g);//绘制底图
- U+ [" I" z' W+ m - t.upload();
# K q1 s- o$ }2 t - let k = 0;
8 ^" ?& \! Q: ]/ T' q. ^, R - let ti = Date.now();! _# i u4 K; }% q4 B2 {: u5 c
- let rt = 0;
6 o: X4 d9 e- i - smooth = (k, v) => {// 平滑变化! ]8 Z! x: ?9 ? }
- if (v > k) return k;7 {& v1 ]4 p, ]8 D8 N- p& @4 f% z' {
- if (k < 0) return 0;
, ?1 B6 U" j$ f& L2 I9 N7 o& q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 f5 z2 t8 d, F2 l - }
, ?6 E, k O% G0 ?1 t - run = () => {// 新线程
, a$ ^& D% r! S( p4 y - let id = Thread.currentThread().getId();. w+ J6 [( Y7 E* Y( }+ e: E6 L2 _4 y
- print("Thread start:" + id);
/ j" G/ |" b) k' \8 k7 @8 B - while (state.running) {4 c6 A/ a; N- ?0 V! P
- try {
8 d6 s& q! d% Y8 |+ d+ U3 L - k += (Date.now() - ti) / 1000 * 0.2;
8 S& L5 j8 E5 S - ti = Date.now();
- H" p4 U* G, |* p9 P8 t& ? - if (k > 1.5) {
" A0 p" b9 {) O0 [9 K - k = 0;
; }, M; l- x' d; A0 x4 t* y% b! I - }
! z5 C% o; K; ]" ], z5 c4 s - setComp(g, 1);
3 k% z9 w8 K$ G/ l1 w - da(g);
+ ?0 s. F g/ j# y& o9 V9 A - let kk = smooth(1, k);//平滑切换透明度% i* s: f& A( Z( T
- setComp(g, kk);( D$ [& E5 y5 i* Q/ {9 O
- db(g);( }0 v- |% G- D$ g5 F( e
- t.upload();' I% t9 L( B$ u' ~' u0 _/ C
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 y: e4 @: p+ Z3 R Z! Y3 O
- ctx.setDebugInfo("k", k);* k! t) F& P! }2 c3 p
- ctx.setDebugInfo("sm", kk);! b2 i8 s3 M5 ~) }7 ]. T. H) j: t
- rt = Date.now() - ti;
. q! u- w$ i z& B( }% ^ - Thread.sleep(ck(rt - 1000 / fps));
1 ]2 M8 F( W3 j, r% z - ctx.setDebugInfo("error", 0)8 M4 f0 u5 h( ^! S) K
- } catch (e) {
* F% B' q% U. _" z. j! T - ctx.setDebugInfo("error", e);8 T3 `6 M8 n0 ?. s" X
- }
9 h1 n' e1 f+ ^0 [( S; l - }
6 h0 A' L: G( P - print("Thread end:" + id);- i! I+ [" f' o3 ~
- }
5 F. l% s% L g4 C5 n, | - let th = new Thread(run, "qiehuan");1 ?3 }7 d& l/ ~5 [9 ~0 F! I, _0 e$ \
- th.start();- D6 N R+ J+ S) C$ z Z
- }2 n0 r3 q" X7 y# K
- , n/ L& F5 W+ c/ r1 ~: [9 H; _
- function render(ctx, state, entity) {
4 Z5 B) w- I/ ^) h/ F - state.f.tick();
9 ~ P5 X: W9 D3 a3 G& l! F+ D - }
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N8 T2 s$ F9 F* C8 o- function dispose(ctx, state, entity) {. K/ k' `& F$ c6 c9 ?' f6 t+ _
- print("Dispose");
- S, I( h6 d8 ~3 N( p4 }& C r) b - state.running = false;7 K) t' I6 o7 c$ i0 B
- state.f.close();
9 O; T4 K/ H7 }* Z3 [5 Y( _ - }
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/ X+ m( {5 v5 a, R/ x- Y0 |4 f- function setComp(g, value) {0 f: m3 i) i( A9 K, M$ e! S) T u
- g.setComposite(AlphaComposite.SrcOver.derive(value));
- D" X. F0 q% y) r$ S - }
复制代码 t- k% B( k0 L8 v
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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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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