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& e: u& e9 |6 a) W! u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。
! N1 D" A, E; ~. \- importPackage (java.lang);
. W& A; g7 p2 P- E - importPackage (java.awt);% h% | w/ W, Y9 u( ~
" J0 b0 |7 F+ E; h- include(Resources.id("mtrsteamloco:library/code/face.js"));
$ o" }2 k6 J2 } - % y/ Y: a B- H- ~# f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& [" j+ h# b* A7 n! ` - ' A% N2 Y) P! F2 f ]
- function getW(str, font) {
+ s: ?: i8 V/ K6 T! A) v0 x; } - let frc = Resources.getFontRenderContext();
! R5 ^1 ^; z( k& {6 _; N8 d m - bounds = font.getStringBounds(str, frc);. Y) f, l; j4 a: _
- return Math.ceil(bounds.getWidth());+ t: O2 A7 ~$ }# O$ B- g
- }& H' r' t9 G, i3 A
- " h8 v) x2 F; B0 P. h- S
- da = (g) => {//底图绘制
" {' Z D/ f7 l) K2 }& A9 c/ M - g.setColor(Color.BLACK);7 X& B& y0 _0 B- p# l
- g.fillRect(0, 0, 400, 400);
7 E* X6 X- b* B' I4 K - }4 {8 A% e/ Z) u- h, d
, W& H: F7 `/ G. [6 U6 P* A8 s- db = (g) => {//上层绘制1 C- ^9 `! m* ^7 T6 c
- g.setColor(Color.WHITE);; E$ E( \ ?8 J$ B: [' Y7 ^
- g.fillRect(0, 0, 400, 400);. a7 h- r8 S: w$ e% T: ^
- g.setColor(Color.RED);$ h. b! S. g/ `6 S6 b, G
- g.setFont(font0);
8 L" B0 i4 C' Z4 w# n8 R - let str = "晴纱是男娘";: N2 h0 f1 V& ?2 C+ i2 ~# o* v" @
- let ww = 400;9 r+ a' Z$ E' M1 u) z
- let w = getW(str, font0);
6 i$ P# H, Y8 J: {. c0 t - g.drawString(str, ww / 2 - w / 2, 200);; L" @0 s! }0 r
- }& a/ V: ]. A: S% l/ Z% k( k' Y
- : j4 R1 W# W; y) b: @6 b5 M
- const mat = new Matrices();
W8 r5 }8 A4 N ^$ z; p- n I9 g - mat.translate(0, 0.5, 0);
# K4 V* s8 d! d2 k7 z4 ?0 |9 }
4 R" a. _7 h% J5 S- function create(ctx, state, entity) {6 t6 }8 t, v6 g+ e4 w. _" |
- let info = {5 f0 C6 K: t/ Q
- ctx: ctx,0 W: ~& X! y0 ?' M; \
- isTrain: false,+ Z2 C9 {1 g5 K: M. w8 y
- matrices: [mat],
V3 z$ M) c3 `0 }) b - texture: [400, 400],: A! \, h8 L$ U% U# s
- model: {. q/ z3 R9 [ f6 j: Y9 N8 Y
- renderType: "light",
$ g3 C9 {+ B9 G+ z0 s( m - size: [1, 1]," ~# l2 p0 V! E. Q
- uvSize: [1, 1]
; j1 w( C9 t* v& Z2 m) `: e1 \ - }1 v3 Q2 \ ]: i! ~' u! { u7 E
- }
9 j n( T& { i6 M - let f = new Face(info);
5 u- n: q$ \" s9 f - state.f = f;) _2 x, x \ W% [2 V2 n
- ; F. U4 }) \7 @
- let t = f.texture;: Q& b9 t* n: v, A4 ^
- let g = t.graphics;8 K' g) u& f1 G+ q
- state.running = true;
* I5 L) u. n6 B& P3 E - let fps = 24;
# a" i; q! D1 D& n% p2 H. Q - da(g);//绘制底图8 w$ }4 m: s) O) e+ J9 L% W
- t.upload();( F3 u- q: x2 T; Z
- let k = 0;
: G5 H O) E. L0 x) r - let ti = Date.now();
7 E. i: h' L# l/ v. U1 k - let rt = 0;( @* O% y( v8 g$ B
- smooth = (k, v) => {// 平滑变化
/ v" r, `5 h- p6 l6 d - if (v > k) return k;
8 c9 X! U( v3 J; s# u - if (k < 0) return 0;
$ P) G6 O1 q, x. V - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" y- I9 O l! s! Q f - }8 s! L8 U3 W7 H. t I
- run = () => {// 新线程6 ~0 }3 q) `/ o, I; }* ` N2 ]
- let id = Thread.currentThread().getId();
- [! d! H$ g' U- |* x/ K - print("Thread start:" + id);
3 j5 \ @0 F5 F3 Z - while (state.running) {
/ [% ^: \8 X `3 B: ~ - try {9 r; R) ?* I$ N% G
- k += (Date.now() - ti) / 1000 * 0.2;/ ]. l2 o* l. c S4 ]
- ti = Date.now();
) ~& l& \5 [2 n/ A! } - if (k > 1.5) { T' o" W5 M" m, K
- k = 0;* j0 s2 i+ W8 v( J' q% h4 _, [
- }' ^8 q3 W; s, S! z9 g
- setComp(g, 1);" i+ X( ~ y% b7 u
- da(g);
+ T) R/ |1 I$ N9 W - let kk = smooth(1, k);//平滑切换透明度
" ~! ]/ Z2 ]. j I) s - setComp(g, kk);0 c* D$ ~5 w6 P3 N4 f7 j
- db(g);$ }3 C! \' G6 a, Q
- t.upload();
* V+ s, M: j& E+ B5 W - ctx.setDebugInfo("rt" ,Date.now() - ti);) C: d& X* }% {2 s. F
- ctx.setDebugInfo("k", k);
2 p1 Y& I( t! e A Y$ y3 S' ~ - ctx.setDebugInfo("sm", kk);
9 _: h$ o3 r7 f) h) e - rt = Date.now() - ti;
1 t9 {& ?3 m$ |6 `! D - Thread.sleep(ck(rt - 1000 / fps)); M1 b' i3 s( T }( d
- ctx.setDebugInfo("error", 0)
# U) w9 w" ~2 Q" p* Q& h - } catch (e) {: Z% F& |- G! h* a( {' x \
- ctx.setDebugInfo("error", e);
0 g( d8 m1 j5 U) k& w) J: ` - }5 n e$ @ R! c" _/ N9 Y
- }' F4 n) n, _% V( S( U1 D3 t6 `
- print("Thread end:" + id);
4 V" g+ m7 d8 R5 m! I+ Q& j - }- J+ R$ ^% z* ?8 C
- let th = new Thread(run, "qiehuan");0 _+ R. q$ r" e* v* h2 y
- th.start();
: t" I7 l3 A# R d1 }7 D5 ~ - }: L" M; |2 t' ~
- 6 Q5 W* c9 n# R
- function render(ctx, state, entity) {
" k- Y: F. T; t# N1 d$ A - state.f.tick();
; T- I8 t* W& \2 l( K; d( X - }# {6 z+ H6 n% i) ~$ O0 x& s; y
& |% o7 ?, u+ S- function dispose(ctx, state, entity) {
4 s- a" [8 d& `2 h; T - print("Dispose");0 @& K* B: }7 Y% F( h
- state.running = false;
, w5 x# C3 F( [9 O) i! d - state.f.close();! H1 q, U7 t" A( t2 L# s2 W
- }
2 ^( \5 \# r7 u5 p' }
" C. @- N/ d5 w9 N- function setComp(g, value) {) N$ |/ z$ H& h( V$ y c
- g.setComposite(AlphaComposite.SrcOver.derive(value)); F' m- J4 ?4 ~1 W0 D) X
- }
复制代码 ; h8 H; m d0 D! F
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。
8 \& v$ p& r& k t' e6 S9 o2 Y3 y5 r) k9 b
. y8 H" C, C0 j3 L+ Z. q( A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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