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1 C: }' k5 V! J8 W7 x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。
- s& j. e" n% O3 \/ O/ g4 V- importPackage (java.lang);
, i& g7 V3 T3 B8 b1 f3 U - importPackage (java.awt);; g2 E6 L0 w& \
- / k9 W8 c3 ?4 S I2 }# C) Q9 P5 l
- include(Resources.id("mtrsteamloco:library/code/face.js"));1 ?4 ]- k1 |$ b2 N8 y
+ J8 Z, B4 U9 J3 y+ Z I- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ h, }( U+ b! H$ y5 x
- + N8 l) D! K P+ y
- function getW(str, font) {
+ o3 F' ] w& T0 D - let frc = Resources.getFontRenderContext();
+ U# {: a9 y4 g a - bounds = font.getStringBounds(str, frc);- |: h5 S3 g2 _
- return Math.ceil(bounds.getWidth());
' i. k% O! m9 _; P: g( I - } `+ m7 {6 @7 ?
- $ H4 O0 A9 P* U- K
- da = (g) => {//底图绘制
/ j9 }: ] \( p0 n5 |7 { - g.setColor(Color.BLACK);
& \! k& ?( ^- Z4 K1 J2 F8 E2 J9 i - g.fillRect(0, 0, 400, 400);
% Z! I3 o$ i: l' ] - }
' r; @: w1 _1 O6 J- ]) \
* K2 U( S: p m" \+ y8 {- db = (g) => {//上层绘制
: C) h. f) d: L, z3 B - g.setColor(Color.WHITE);; e! f" t& u8 n- O- y8 G1 x
- g.fillRect(0, 0, 400, 400);
& D! X: @7 Z% G( s - g.setColor(Color.RED);+ U( U# N$ e! V% o& b% N
- g.setFont(font0);
: s4 w |; \+ y3 Z2 m% @ - let str = "晴纱是男娘";
$ R# c3 v5 ~& n c - let ww = 400;; J2 j9 K; j0 s3 x" k
- let w = getW(str, font0);. y" \ l5 M) p. g9 ~8 d
- g.drawString(str, ww / 2 - w / 2, 200);, O! W" L2 h1 u* j( k2 o6 ? [" }% }
- }3 U- B! M3 C: ^: K% n
- 5 i6 ?; w6 a; W& |
- const mat = new Matrices();$ y" u& Q+ R5 m, W; ?; t
- mat.translate(0, 0.5, 0);0 _) |: j$ r7 S& N4 x; H
- + @% l7 @% b9 U& L
- function create(ctx, state, entity) {6 t; y9 M D" H v) t
- let info = {0 {- P5 Y3 M" x' x9 M: G `/ v
- ctx: ctx,4 w0 J4 G$ v/ }( V/ h5 h) P2 c
- isTrain: false,2 ]9 K2 K& j( A7 A0 [
- matrices: [mat],
0 i& b( B+ E a3 `4 }$ W) n( M) w0 a - texture: [400, 400],: T7 j+ T5 @ j6 U3 a/ r- j
- model: {
/ Y$ R) k- P- H - renderType: "light",
' z. \% Y9 a# c8 c - size: [1, 1],
6 |! E; c8 R7 N) M - uvSize: [1, 1]
& I- ^8 ~ M( d. v! H8 m - }: `0 s6 C+ y" c u1 b. W9 Q" j: h: J
- }
7 z% _) @- t- e5 d1 F) S% i7 ^ - let f = new Face(info);
$ ~7 k7 K B! G ?0 t" \0 ~ - state.f = f;
2 i+ K k- s3 R& R- z5 i: C1 Z - " P- P4 \, y+ E- R0 a& b
- let t = f.texture;
4 j% T1 Y, c2 X, z8 j+ `2 {3 d! ^ - let g = t.graphics;
5 }, j& r- N/ M* a - state.running = true;
) S9 Y1 v+ i/ f5 s/ Z s1 P - let fps = 24;! p* j0 O5 ^( b1 b4 G
- da(g);//绘制底图) r! T; g9 O/ P) D: m% r7 s2 C
- t.upload();7 z& |; V9 t. M0 ~ F
- let k = 0;6 [& [7 z' u& {
- let ti = Date.now();
; w) N! H9 l, M* f - let rt = 0;1 n) x! n9 R: j1 S5 z! l
- smooth = (k, v) => {// 平滑变化
0 S8 i3 n& @7 A0 G( Q - if (v > k) return k;) b/ l7 C/ x) ?
- if (k < 0) return 0;- o" l. y6 T- |- {. W V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% l; I* G) ~0 d% M. n
- }
, s3 I# E7 j# }9 k+ R; S v - run = () => {// 新线程
: ~7 B' T# M8 h3 p% a6 I' b$ o - let id = Thread.currentThread().getId();+ E6 j+ O* v+ l# u& C% l' |' ~9 ^
- print("Thread start:" + id);. C# u+ [1 O* M( @8 e
- while (state.running) {% f+ b& v4 u! _$ Z' A
- try {! Z. d1 h0 |1 A
- k += (Date.now() - ti) / 1000 * 0.2;2 ]& [$ @, \1 }# R
- ti = Date.now();2 T X1 `0 K; }
- if (k > 1.5) {
& [ C, E) d3 J1 [% W- r - k = 0;
5 f9 @2 ~- \/ V8 Q, a - }
3 T- N/ B2 Z5 n - setComp(g, 1);
/ ]$ z( D* v# A$ H) R. E - da(g);$ z# N3 `5 X- N$ t0 g
- let kk = smooth(1, k);//平滑切换透明度3 g4 D( ]. i% j5 V3 P
- setComp(g, kk);
0 ~+ u# h; p- r; `" h$ ? - db(g);. I( @8 R4 O9 W/ ~' S7 A
- t.upload();" Q9 X9 b0 G6 h& \
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ I9 g1 u& h3 s( w) R! d! X' J. \
- ctx.setDebugInfo("k", k);
5 }4 Q' a+ D; L% P4 n; k# b - ctx.setDebugInfo("sm", kk);
3 R3 C+ y. C' K - rt = Date.now() - ti;
9 x Q; u j' m' i - Thread.sleep(ck(rt - 1000 / fps));
6 N! |, |( B' ~" x - ctx.setDebugInfo("error", 0) }% E L1 x" m3 c: R
- } catch (e) {
+ \* K1 ^* E" D' P" z3 B - ctx.setDebugInfo("error", e);7 e. u4 @( R) Z2 i. ]5 e
- }
$ }% @- n; s# f( l' m H - }
/ C6 v) B, P. `" F" Z - print("Thread end:" + id);+ V+ X# N8 \7 G& r
- }
7 c% E, F) M0 {- T' Q4 @9 y$ O - let th = new Thread(run, "qiehuan");2 _8 v5 y2 ]' a9 `4 M
- th.start();" L% ]0 D" q4 P1 T2 u
- }0 }9 a, x/ m& o1 B( ]# h o0 W
* y$ ~ F/ v ?+ M- |, j- function render(ctx, state, entity) { I9 J! Y. F$ R& X3 Y* g* g
- state.f.tick();
) Y: m% i9 }. _% A8 v' f5 c - }
1 q" J! N" g. h! w: _% o! O0 ^
8 {* M5 M d8 n; q- e4 X- function dispose(ctx, state, entity) {
: a$ L/ W4 E& W3 \ - print("Dispose");
5 f0 U' U; B Y; b8 y; Y - state.running = false;
: u% d6 J) z6 s* s9 L' T- j7 ?4 C - state.f.close();! C1 l6 t) i6 t+ p5 Z9 P" }4 `
- }
; A" B) [' m1 I- C3 y) c
1 i7 W9 B. J; p& d- function setComp(g, value) {
; n8 o- |; c* |/ \& U4 s - g.setComposite(AlphaComposite.SrcOver.derive(value));4 t0 H' X' \: h2 K/ A( [
- }
复制代码 ( I& w }0 a9 v. D' }( A
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。; ~. _' b ~3 k, D- H; T
+ }# Q% Y) j% G% S( p8 ] `0 I( K( r' \" o6 @
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). f3 L* R& F/ `$ C8 b
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