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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。% O, V/ v8 n; W+ i+ k$ H. h) A
- importPackage (java.lang);' }5 s" K* m1 X; t2 T7 A; S0 ?
- importPackage (java.awt);
/ \. {6 O; w4 U. k5 K - - a% _( N8 ~* J
- include(Resources.id("mtrsteamloco:library/code/face.js"));& |: o" N% t" s+ o9 {, l, X9 ^8 V6 W
+ d! W5 h* e' `$ Y o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
) s0 y" V% G/ w2 g5 O; W6 s7 l
4 E4 x; R, `2 }+ C; W/ k- function getW(str, font) {: {% u# f/ n; u2 d3 b
- let frc = Resources.getFontRenderContext();
4 A1 a. Q, q' r5 J6 H2 O+ U - bounds = font.getStringBounds(str, frc);
i, t2 E( A7 c0 k" n. e - return Math.ceil(bounds.getWidth());
5 O5 d/ f2 q( ^: R0 K) _ B - }
9 D+ e( p9 V5 Q% O7 l2 c
! t2 `8 ~ a* ?/ y& M- da = (g) => {//底图绘制
6 g2 w% B# x5 W( E/ Z* v; `/ U - g.setColor(Color.BLACK);$ O; ?' U/ X3 C% p8 C2 Y
- g.fillRect(0, 0, 400, 400);
- h' q! q; U& Q - }: ?. L! o: [- i$ \4 |( m$ H
" c0 U% k( @, @- db = (g) => {//上层绘制* Q9 R0 q# v& O1 ]
- g.setColor(Color.WHITE);1 I$ o. B( x. k w
- g.fillRect(0, 0, 400, 400);
: U0 N' t% V, d V; L6 \ - g.setColor(Color.RED);1 Z5 j+ P5 c3 [
- g.setFont(font0);2 C3 Y7 Y {: Q% G. b# z
- let str = "晴纱是男娘";
+ T0 R0 l5 c& [3 ^) y) b2 ^ - let ww = 400;2 A0 S( N" c7 D
- let w = getW(str, font0);
]# m. Q5 s2 _* _* s: z& ` - g.drawString(str, ww / 2 - w / 2, 200); w, | ^$ b5 T! ]
- }
w: `; L9 r: [( W
; z1 H* L$ H8 d* r0 P: x7 r- const mat = new Matrices();
- I5 B" A( Z6 T% h9 I5 h3 ` - mat.translate(0, 0.5, 0);+ N$ P6 J* V1 j n( V* c
7 l# A7 W. H; ^- function create(ctx, state, entity) {' K: A ^: y, @" Q' } K) K
- let info = {
& W. q; X: \/ n - ctx: ctx,
( a' k* f8 v7 _1 p! N' M - isTrain: false,
/ D! o I* n+ p4 h - matrices: [mat],9 Y) v4 B U% i- F
- texture: [400, 400],
+ H& V6 C5 `+ |5 y: D! C8 x$ X - model: {
, f f5 L( b2 m+ c* W2 X/ x - renderType: "light",
4 F, q' U( @, p& ^2 {2 n$ V) q |, J - size: [1, 1],
, C$ J! o: Z1 e- B - uvSize: [1, 1]+ j: D/ u w5 o/ q0 a" h
- }
) }3 r! L; M+ p) O2 K - }
) Q2 N! a$ \7 s1 O& V. ? - let f = new Face(info);# K- B S9 h; s
- state.f = f;4 o+ J7 u& B9 ~- h2 i. B7 d
4 S8 g6 b9 Q! O! ~- let t = f.texture;
C3 m, ]2 z& w$ g% w6 T5 c - let g = t.graphics;2 @; m4 _9 |8 k) ?7 L7 m# i
- state.running = true;: M* [. \& v. R: N1 }
- let fps = 24;8 Z+ d5 Q2 z, g9 M/ {
- da(g);//绘制底图 Z; n% x7 v* m4 F
- t.upload();
) W+ H d! u+ {+ U3 M. k( P2 `5 o3 o/ ~, F - let k = 0;
3 U' X: x4 F1 i9 p2 }3 G _ - let ti = Date.now();
! s& Z6 b% P) ~5 F# ~# j9 H - let rt = 0;" A% |( d: |5 E0 ?
- smooth = (k, v) => {// 平滑变化
]* M8 o5 l, r5 k2 P6 h" y - if (v > k) return k;# c; p5 c% G+ o- [" O$ q
- if (k < 0) return 0;
$ V9 i% M1 X1 y1 g3 J1 ^$ U - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 B: a; _' ~$ A
- }( G4 c7 O* _. j1 u+ [& M8 \
- run = () => {// 新线程
+ \" S( \# Y7 F$ w, G9 x' e, H. @ - let id = Thread.currentThread().getId();
& k- x: D3 z; z - print("Thread start:" + id);9 E& Z0 P+ ^0 b- o+ B* r" F" Q
- while (state.running) {, V2 [ I% D8 ^4 q4 ^( r6 l: O+ T7 L
- try {
' z1 p5 n8 [4 i1 \$ K( a# x, V - k += (Date.now() - ti) / 1000 * 0.2;7 X% L& j" x, v; C% G
- ti = Date.now();
' Q/ E7 Q7 r- u# Z' X6 i% l4 g$ p - if (k > 1.5) {' ~/ j* Y' V% H
- k = 0;
' o/ g0 j, Y3 M8 n& N( k9 x - }
3 h: T9 M9 v) w: f$ l, N p - setComp(g, 1);
" @% ?7 q0 a9 u4 |' a - da(g);
7 X- u4 N- n3 C& K* r9 H - let kk = smooth(1, k);//平滑切换透明度
) @* M" r: H8 ^; L* B2 D4 R+ H8 F - setComp(g, kk);; y2 k& B( `" m' a( s5 S+ ?
- db(g);
; `7 Y+ h m: _! [1 w. ^7 C0 e - t.upload();
- f S1 p } b! I* o - ctx.setDebugInfo("rt" ,Date.now() - ti);% `! i; E V2 H T3 n
- ctx.setDebugInfo("k", k);. x3 h; o1 p* t: {
- ctx.setDebugInfo("sm", kk);! a/ w8 r- {$ s/ e( i: C8 M
- rt = Date.now() - ti;. `3 r' W# z: W. t6 G
- Thread.sleep(ck(rt - 1000 / fps));
& k6 y9 ~ ]6 D- f' M& w - ctx.setDebugInfo("error", 0)
" m9 R" G1 p( L7 B5 T - } catch (e) {
# I# @- z; @( o% x - ctx.setDebugInfo("error", e);
' \& B" q4 x, ^" l - }
* @) c8 o' W0 m6 C* M - }
& S, `" j4 ] ^& @/ S% T4 b - print("Thread end:" + id);
& G& w+ A$ C5 L! L( J - }
I; B! q k9 z7 o! `% } - let th = new Thread(run, "qiehuan");
8 K6 w, ]6 O, {0 ?/ ] - th.start();" K* l% e/ S" `8 M0 Z( a
- }% g* e: C( `- I9 A `8 }" s
2 o1 ~: {0 O+ N- function render(ctx, state, entity) {
/ D: H) z& {2 {. l6 f - state.f.tick();
6 x' C7 t R& U9 S* v7 k - }
; U' l6 j2 {! Y
4 H1 ~% h0 Q1 b5 _) ?- function dispose(ctx, state, entity) {
& U( G5 S6 y) u* O3 T - print("Dispose");
) z, v6 } N. a) G2 @ - state.running = false;
1 O! O0 S) c8 ~* @0 G: ~" C: Q - state.f.close();5 q7 k/ f) h* U3 g4 M5 O# ?
- }
) A9 |8 K* Z( t$ m
7 ?9 D9 H- Y0 K1 F1 N- function setComp(g, value) {- G- T) G' G# k2 S; b% U6 j
- g.setComposite(AlphaComposite.SrcOver.derive(value));
& p; X4 C, q% J& u9 ]: J* B - }
复制代码
" Y5 G* t$ S) T$ I# {0 C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。
( f: V E/ {% v0 k9 {5 F! q2 g4 B% J: X, b6 }; k
* h& \9 T' j& \2 }1 l$ 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)$ h! B' c+ u$ H
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