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{# W2 t& x" m6 P! 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。3 S, ~) l, P8 J* G5 r
- importPackage (java.lang);
% W% ?* N5 @( ^7 g - importPackage (java.awt); @: E8 F+ n! v" l {, G0 X
- 5 ] J/ x% N1 h E! C7 l0 F f" ]+ T
- include(Resources.id("mtrsteamloco:library/code/face.js"));
4 \' r. J. [8 Z/ _
$ u9 b& h# U8 _) J2 }- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! Q7 L1 {. R, l, k( C: a+ w0 v
7 [& ?+ z: _: j! V* z0 O2 f- function getW(str, font) {% `, Q& z( }" p
- let frc = Resources.getFontRenderContext();/ F- y& |+ Q) Z: N& s3 }+ Q3 k
- bounds = font.getStringBounds(str, frc);
! `6 K* A; q+ C$ ~" p8 R - return Math.ceil(bounds.getWidth());
' ^( ~' R' j4 w$ ^ - }' w/ G7 d# Q$ _ e
$ ]" f5 l$ x3 H2 T; c: T* A- da = (g) => {//底图绘制
7 U. A( E0 z) Q, h1 s - g.setColor(Color.BLACK);
# u' r/ I$ l# T H' b" e - g.fillRect(0, 0, 400, 400);8 l8 q) U) E( G% t3 W* C
- }" e) j# W# y/ P
- 7 l0 n0 R, F: u% g! t5 q0 P, ]
- db = (g) => {//上层绘制
5 G; {9 _2 W* W8 E# ? - g.setColor(Color.WHITE);% t' N! _; u6 Z2 I+ n0 H& N9 A
- g.fillRect(0, 0, 400, 400);
* K% M, ~' }4 @, y7 L9 Z - g.setColor(Color.RED);
: n7 ~# q7 \. N9 _ - g.setFont(font0);( D& z$ {' D& d# Q& U$ S4 k1 v
- let str = "晴纱是男娘";
% w- c2 n+ b; E. B6 T1 ^ - let ww = 400;1 ?% Z. K# T! O! Z7 r* ?1 Q
- let w = getW(str, font0);5 d+ {' U3 H0 \
- g.drawString(str, ww / 2 - w / 2, 200);) g# p+ T. c$ N
- }1 p. N# m& i& O8 U7 n: }
- 3 a* j. e6 H$ X2 j
- const mat = new Matrices();
2 `2 ?/ ]1 n: |" ^: z3 P$ Z - mat.translate(0, 0.5, 0);: l- @& v& G! }* T' }% Q1 j
6 x V+ |! P% i- function create(ctx, state, entity) {
( @: i2 j2 U3 [. U' J - let info = {$ P6 `/ s& k: A; s6 x% U3 V u
- ctx: ctx,
8 y+ N2 D* p1 f0 }1 f1 k' v, s1 ] - isTrain: false,9 V3 f; u2 V8 m# Z' R& h5 k
- matrices: [mat],
3 @9 p1 @. o" K2 S, v& s% o) c3 |( T a - texture: [400, 400], A- @8 Q) b/ o' n+ @
- model: {
; y0 G$ n, h) V# R4 @" A - renderType: "light",
3 R' k ^) z3 @7 w$ w. b1 d - size: [1, 1],+ d! c- g0 e; N' \
- uvSize: [1, 1]
5 N: t, M, j5 n/ ] - }
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- let f = new Face(info);6 w, Y0 g$ T, h9 \0 [
- state.f = f;
6 n8 r! q, p) N, R7 o - / b6 w! s, p5 ^9 x' C' S/ E% g
- let t = f.texture;
# {& F1 \" u) c& |) c - let g = t.graphics;
( ]) ^6 x4 u6 c3 i6 C - state.running = true;) `2 O$ I3 \7 ^* P& [6 r7 Q
- let fps = 24;
9 Y I7 K* g( E! d f% Z4 e - da(g);//绘制底图4 h# W- W! U7 c+ o$ o& a" Y; l
- t.upload();: s* q6 A( }% @. I( ]7 O3 W5 t
- let k = 0;
5 r' ]( r# t6 `8 |; S - let ti = Date.now();
6 u* z' p$ [; S: H - let rt = 0;( P- V/ H, _& V: u6 u) d# K
- smooth = (k, v) => {// 平滑变化
' z3 k1 Z# N1 Y: g- \ x% D( p) a - if (v > k) return k;$ U: M% `( _% a2 M8 v9 S
- if (k < 0) return 0;9 o! a# M: }; A- I
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) P8 [* N! C7 q
- }
! W0 `5 c0 f9 [' n: ? - run = () => {// 新线程% O8 K& y: a7 a
- let id = Thread.currentThread().getId();
! j' P) L# n* M6 B - print("Thread start:" + id);) q7 Q' L: ]; b: E9 S
- while (state.running) {9 N9 ]4 M% R# l$ M* K2 J
- try {
2 Z1 J8 J6 [1 p - k += (Date.now() - ti) / 1000 * 0.2;
6 v# x6 u4 X G" F; i/ v+ [ - ti = Date.now();
) z/ t8 E$ m; c% X( z" ]7 Z E - if (k > 1.5) {! L7 E4 Y" } c! t
- k = 0;7 `$ B5 A3 g4 J7 U9 U) A- F1 P
- }/ \6 ^# i! R) Y
- setComp(g, 1);
- @9 c4 I6 Z2 c9 W" g' o# x2 n - da(g);) V1 K: X( R3 p& n+ X
- let kk = smooth(1, k);//平滑切换透明度; T5 g& I6 \3 t' f
- setComp(g, kk);) f/ K& i7 v e
- db(g);& X8 S" f# h" }) D4 J9 F& u0 p& S
- t.upload();
8 p0 o; ?/ h" W: J/ \8 d! r - ctx.setDebugInfo("rt" ,Date.now() - ti);4 i7 m1 a/ h+ [0 J/ P8 |' q
- ctx.setDebugInfo("k", k);# _/ u% K0 h! n% e, Y" Q
- ctx.setDebugInfo("sm", kk);
2 P3 ~4 O3 s' a; _1 m' G0 y - rt = Date.now() - ti;: n' T' a# d `5 u
- Thread.sleep(ck(rt - 1000 / fps));
! V; V" E5 z8 g$ [* J" T3 E% y - ctx.setDebugInfo("error", 0)
1 G @1 {5 i7 `4 G: j# V- X - } catch (e) {
- A& J9 s+ A' V5 b& I8 \' p+ Y - ctx.setDebugInfo("error", e); K; Q7 N) A2 F4 ]6 P$ ~
- }
H9 D3 F3 L7 t' l4 t) e - }
2 T8 d- Q \- R2 l: p - print("Thread end:" + id);! H3 @( B! V( w6 G' c# x$ e, x
- }& v- T) q: M( l% J' P7 O: S
- let th = new Thread(run, "qiehuan");
. A: E+ }2 g: O7 n" B - th.start();
& w# B9 T4 f5 f* I3 c - }
& @6 D2 Z, @% k7 h) E
# n2 g2 ~6 I( ~1 ~( u, k$ w/ H- function render(ctx, state, entity) {- w$ [" t4 V1 @! J4 o( s
- state.f.tick();
2 T7 X7 D( K( A1 s - }6 e# y9 a: k, ~' z" a6 i, s0 R
$ w. B, z3 q4 H) }% W' l* V- function dispose(ctx, state, entity) { w8 J9 _8 j) e# N% j# U6 T% F
- print("Dispose");% G6 U$ o9 o* R4 O% \; I" c) M
- state.running = false;7 }! ^+ G) q7 z( u* c' F
- state.f.close();
; Z# K9 c2 W: C - } D `0 N: G3 B. s2 }' |5 H
- : U. i# w5 j6 V# K6 `
- function setComp(g, value) {- G' ]+ a& ?9 B- u" i
- g.setComposite(AlphaComposite.SrcOver.derive(value));& S( n: `" R) J# S, t' Z" a
- }
复制代码
: ^/ H- \( T3 i* J4 O1 ~: P/ 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。( a: H9 U z- o3 O+ c
, [' j6 V5 |( C! `+ Z
$ F" i$ Q8 m5 P* r+ M1 p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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