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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。9 k% S3 Q( a2 g: q+ l
- importPackage (java.lang);
( K3 z4 Q; [0 k/ c# Y, e, ?% ~) I - importPackage (java.awt);' I6 e: F& X9 s' N, `% u3 v
5 B4 F8 l4 u5 E) s9 x' |- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
' }% J0 l; `, a. A - let frc = Resources.getFontRenderContext();
3 o9 [7 C4 N) N+ x! } [( k) F# w - bounds = font.getStringBounds(str, frc);" U* x: q6 N( t4 G
- return Math.ceil(bounds.getWidth());' H( |2 F) H Q
- }
& X) ^0 N. H0 |
7 a& }) k2 H: Y" n$ h! `; f- da = (g) => {//底图绘制
! g) W9 o( C. W0 d. T" F& I - g.setColor(Color.BLACK);( a) W& v" ?7 |+ o( d' O8 N4 H( f
- g.fillRect(0, 0, 400, 400);
- C, Y% f' b9 A6 u ^' f: I - }
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* z1 C3 }. v0 u' f3 y/ v, T( N- db = (g) => {//上层绘制
, N- s& j# U: \ - g.setColor(Color.WHITE);
9 w9 w* E/ ^3 N+ L4 \7 g) P( h - g.fillRect(0, 0, 400, 400);+ o4 C0 K4 C/ |+ }+ h; ]
- g.setColor(Color.RED);
! y- F' z3 J/ M4 Y - g.setFont(font0);, O* B6 W: n( Q; p5 ~3 c
- let str = "晴纱是男娘";
" ]' B* _5 { i+ j; g1 P - let ww = 400;
; M/ R# \% a* n; d* V - let w = getW(str, font0);
! G9 S0 ~, L6 D2 F1 y - g.drawString(str, ww / 2 - w / 2, 200);
/ n! q0 Z5 v2 {3 G - }- ^ D) W2 l# W) l) j0 b
8 k. _; K& N5 z1 m- const mat = new Matrices();
* K, E( O. O; g1 z! i2 M - mat.translate(0, 0.5, 0);6 B. L7 n/ y. b% u1 [ k
: n4 R) I' u, g- function create(ctx, state, entity) {
( n7 c: ]4 Q+ w) H& y - let info = {
4 g- `8 g+ I$ w- r( t+ Q" @ - ctx: ctx, i9 P$ }7 F/ x i# [8 n" O
- isTrain: false,
9 w2 o2 n3 C; S0 ^) E - matrices: [mat],% i8 ~4 Z8 \. z6 C4 b
- texture: [400, 400],7 M( x; G( v2 F
- model: {3 ^# J7 X& E3 [3 x. w g
- renderType: "light",
' w" r. `( h/ h( T1 } - size: [1, 1],
4 q) B( \' d: P) m' @' s9 M - uvSize: [1, 1]9 Y7 E7 G- B3 P8 K' t) @- U1 j( @& A
- }! _' _1 R$ k8 k0 | ]2 w- k
- }
: i# X" `0 U& y2 b/ K* g `" p - let f = new Face(info);: G$ Z- H4 o% e# E% h
- state.f = f;
- ^- [7 x1 ]7 |, X+ ? ~) A% [ - & Y* }8 K r0 C$ ?) \" y9 C( K
- let t = f.texture;9 K0 V2 q/ U) \3 Y0 [
- let g = t.graphics;
! \( Z8 e1 O! t* } - state.running = true;! T* N4 D3 m6 n2 b) _
- let fps = 24;; ~" {" U3 Z R0 w |; H
- da(g);//绘制底图
. K) h: m/ M8 L$ @ - t.upload();8 w" y; C+ |) ?" v! {7 {
- let k = 0;
! m( j3 p" h0 P! U0 Z: ]& Q( t3 ~" x - let ti = Date.now();
5 ?- U2 N& N% S* s! v6 N# l4 K - let rt = 0;9 i3 U$ Q" s* ]
- smooth = (k, v) => {// 平滑变化
/ O% V6 m0 O- ]( K - if (v > k) return k;
0 T( x. P4 r, z) ?9 e, u$ K - if (k < 0) return 0;
+ k/ o. a. x; K - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 @- N, v! v1 }! H, z - }% E0 Z2 b4 f) m; E& w0 f4 C+ Q
- run = () => {// 新线程1 H0 u, N% }) ?8 S
- let id = Thread.currentThread().getId();
: r# _7 \$ r* `. Y" | - print("Thread start:" + id);
8 h$ U+ b% |) h, ~- | - while (state.running) {
/ h( l2 R+ e, i1 e6 I - try {
- N/ f% ?& \) y; G1 l* Z/ Z2 }9 W - k += (Date.now() - ti) / 1000 * 0.2;% F3 J! f! s1 ^3 K8 \
- ti = Date.now();% ~* r/ r# a' y. k; f. u! N7 h3 J
- if (k > 1.5) {
, d: c2 x; G; V. |9 J( c8 C+ O3 \ - k = 0;
" S2 y1 E- n! d4 {' r7 \0 e1 S! a - }- W% w7 [) @3 t+ G6 `
- setComp(g, 1);
+ w2 S- j# l' B; G$ y. W - da(g);
" Z$ T6 j, O- F' ~/ V) W - let kk = smooth(1, k);//平滑切换透明度' B. C; O" ]( o
- setComp(g, kk);6 a: u E% ^4 N' i3 N6 c
- db(g);, e& v6 {& @% S- M' b! M) z* V
- t.upload();+ G1 U- d* ~1 R0 d9 W5 K0 [- K
- ctx.setDebugInfo("rt" ,Date.now() - ti);. n) Y" @8 [- J! ~3 C0 b
- ctx.setDebugInfo("k", k);
+ \2 R L5 [2 r4 B0 } - ctx.setDebugInfo("sm", kk);
! T7 B2 `2 E$ u* }1 J* [- H - rt = Date.now() - ti;
3 D. z: @4 J: R; M/ i - Thread.sleep(ck(rt - 1000 / fps));
4 H# G! T! \3 J) Z% p - ctx.setDebugInfo("error", 0)
% P1 B+ a. I; z" k, q - } catch (e) {/ a5 g7 D4 Z" E5 r- e8 A8 c
- ctx.setDebugInfo("error", e);- G1 `( P' b) z
- }
- C% `- f/ k- t1 ?7 _& A0 S - }: R3 T5 u& t3 W" \! e
- print("Thread end:" + id);1 p6 ]+ [( Y. L- k3 I, @. Y
- }8 j5 v2 z+ P9 P: I" I B
- let th = new Thread(run, "qiehuan");
. ~, R ], ^5 g - th.start();* r5 p1 L8 G& f4 c
- }( S2 }$ R0 U) b$ i( S9 {" ~
- ; R+ ~0 a) J- a9 u6 ]" | B
- function render(ctx, state, entity) {: I3 ?' r# L/ Y* F
- state.f.tick();& K. R9 Y0 ~3 Z2 ], F
- }
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- function dispose(ctx, state, entity) {: M+ U N5 l ]- N2 g) l
- print("Dispose");
, B7 d: K5 h e* D, Y! B0 @" H8 _6 ]) w6 Y - state.running = false;
0 R8 D1 {& J" [" P - state.f.close();
t; h$ L) U0 @! i; P$ G: r - }
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- function setComp(g, value) {3 d7 b |+ L4 m8 S: R, h N
- g.setComposite(AlphaComposite.SrcOver.derive(value));. I9 k( ?) j, L2 F$ s
- }
复制代码 " F* g* u8 s. e. j) S0 W
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。
/ G1 [5 F: x, s: _0 a6 k: Q& Y# L: h% i5 ?
% f3 H Y+ [2 ` }$ d8 R+ I顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! b( e( I) O8 j2 [+ D! d/ k, ~3 l
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