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6 d8 C K( x9 F m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。
5 p5 v+ p( L: H3 x' s3 a+ Y6 s- importPackage (java.lang);8 X A) o i9 G# a& u
- importPackage (java.awt);
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! R0 x6 \" [9 N- include(Resources.id("mtrsteamloco:library/code/face.js"));, {9 |+ F: V6 r" E
- & |( ?5 o! j# j7 @& t
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- _# K2 v1 H) f6 K
) X- w+ Q2 T; Z& j% ~- function getW(str, font) {
, L; ~, y5 N% R3 w0 | - let frc = Resources.getFontRenderContext();
4 C+ }* i* L$ A. f9 p - bounds = font.getStringBounds(str, frc);
! e& a' h7 R2 Y( D/ G/ M - return Math.ceil(bounds.getWidth());0 D: u; r3 Z2 [6 W0 s' E
- }3 b( g% N( y7 G5 q! K, l0 e' p1 B
. p# |1 Z1 f. R8 [8 V {. Q! Y- da = (g) => {//底图绘制& C7 Z" s: C0 G9 g. ?
- g.setColor(Color.BLACK);
# Q% Q1 s6 {: Q. B) h - g.fillRect(0, 0, 400, 400);3 b+ U. @4 c; @% u8 Y
- }8 F V: |; k* ]% ^- F( y
2 v( p9 g( K; k2 I) y2 E. x- db = (g) => {//上层绘制
+ S" B7 u& c% m7 d - g.setColor(Color.WHITE);
1 I; m8 S$ ^. Z3 N% c) X( x$ P% [7 J- I8 m - g.fillRect(0, 0, 400, 400);8 D @ T: P# N" i, X
- g.setColor(Color.RED);8 ]+ B, C3 g' J8 g: K! L' w; m/ v2 L
- g.setFont(font0);
# y2 V. H9 Q) r1 q - let str = "晴纱是男娘";, E; }5 n- l; w( t* c `5 `6 d
- let ww = 400;
, h0 n: S3 b* i+ ~+ V3 Z3 D& _ - let w = getW(str, font0);
0 S2 N! {- {+ Y+ I4 H - g.drawString(str, ww / 2 - w / 2, 200);
- T* s7 {3 d& N( e; O3 S - }
t; E% {7 {6 c7 E+ z
; J l# Q! f6 l- b- const mat = new Matrices();
# ~( {. J( S/ o$ u2 M - mat.translate(0, 0.5, 0);$ d' k$ T! F9 y* k0 I
3 h6 [0 K8 P! g) e, D: D9 ^- function create(ctx, state, entity) {, J) i; s8 C4 L# J4 S" W- c
- let info = {9 V- I9 X5 N/ m8 _0 n
- ctx: ctx,& T( @" c2 @4 R
- isTrain: false,4 ^' S! s3 [9 U; K! \3 C
- matrices: [mat],
$ R6 Y3 B/ m, m6 L+ N# r. M - texture: [400, 400],: C# X( F- ?( b+ I `) S9 e% a
- model: {, R5 ~" Z: N" f$ Q1 B
- renderType: "light",
# A6 P! j$ _4 O4 D - size: [1, 1],0 }2 ~: A0 `, ^& ^- C
- uvSize: [1, 1]$ P: w$ z- T e, m
- }7 j$ w1 \" g( N: c4 g* v
- }, _! m9 @4 q8 f$ v2 | g7 {- e, H
- let f = new Face(info);
3 e" L% k0 v& c6 ~% U3 y - state.f = f;
6 F2 x! J$ R, P6 i& u9 Y" p
. K/ o4 T: [8 y |. z+ a% {& r! l- let t = f.texture;; u% w; u. p2 {' d! _
- let g = t.graphics;" k) ^1 q/ ^+ E& V& u% }" n. `
- state.running = true;
; `8 R5 M2 E) Q+ u1 M/ A+ b - let fps = 24;
# b( ^4 k n8 G3 j1 o2 _8 v - da(g);//绘制底图
; T. K+ [- X% g6 ? - t.upload();5 }: k5 i& }5 s1 ^$ k' N6 c
- let k = 0;1 n0 m# Q, {& Q# R
- let ti = Date.now();. G7 P j, p) U2 v0 q4 t
- let rt = 0;
) H% p' T! H) X1 c8 z - smooth = (k, v) => {// 平滑变化
8 O5 }7 _; Q, A! [9 z, S p - if (v > k) return k;7 v' j7 V- o' m# ^( S
- if (k < 0) return 0;
+ h8 r* }- P! s4 C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( Z% G! q& W# \" n
- }
3 k* o7 D x' b# w1 s5 U2 c - run = () => {// 新线程# l4 v& ]& j4 B
- let id = Thread.currentThread().getId();
& K1 p5 J8 p: x8 `6 a9 j7 Z - print("Thread start:" + id);! ]! |5 ]6 U$ e- h
- while (state.running) {# Q& L) g& {. r7 k' m2 I" ?. P5 w
- try {
1 X! a7 P$ Q$ r- G9 Y. R) _ - k += (Date.now() - ti) / 1000 * 0.2;9 O3 u% T) g- p0 t* M) m9 `- B
- ti = Date.now();: D' Y- t5 j- Q9 v9 r; A+ b
- if (k > 1.5) {6 ^( q8 O8 c, R0 ~0 i& h
- k = 0;
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- setComp(g, 1);
: S4 b# _3 u6 v5 H7 I - da(g);. k& A- A1 O, K7 t
- let kk = smooth(1, k);//平滑切换透明度" ]7 S1 X1 p/ ^1 J" d7 d5 F9 ]
- setComp(g, kk);
; k# `4 ^7 ?5 u `) y5 T8 }$ W! d# U - db(g);- |6 G1 I0 U2 a- k. Y
- t.upload();+ E6 F0 R7 p7 z
- ctx.setDebugInfo("rt" ,Date.now() - ti);; h% N. e2 ^8 C
- ctx.setDebugInfo("k", k);* C% O8 F2 n O. ^- X
- ctx.setDebugInfo("sm", kk);" [7 `" w1 E. i- ?: V
- rt = Date.now() - ti;2 }4 w+ M9 F& G! g
- Thread.sleep(ck(rt - 1000 / fps));
' M# u, R# r8 h) I* g% S& i - ctx.setDebugInfo("error", 0)
4 _1 }2 G- o! q+ A# s. F5 U - } catch (e) {
/ D- z, j; B" M+ {5 @& }% ` - ctx.setDebugInfo("error", e);
+ u% I |4 ]1 ~; z' c: G - }
/ A: E; ]3 a* q- x' ? - }
( N! J+ `# |" i - print("Thread end:" + id); C- m* J$ w- e% y( |: F$ M
- }& O1 M w- @% q
- let th = new Thread(run, "qiehuan");5 h1 [8 X' C" Q3 \0 ~
- th.start();% F5 ~2 P' I4 N: x
- }
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# E, T# c$ x K4 _* s7 U" I- function render(ctx, state, entity) {. C G' W- K0 }, H# M9 B* u) i4 E4 |0 \
- state.f.tick();
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- 9 L+ r( D; E1 n7 _. ]# z
- function dispose(ctx, state, entity) {* m# ?/ t4 u! c- U
- print("Dispose");
5 N, G! b: v* Y F - state.running = false;
" ]. z s L+ F* K - state.f.close();7 t n" E. M9 [
- }
" _) d0 \1 r/ d0 H, y( u$ g
8 S9 v5 }; H& p( N" R+ k- function setComp(g, value) {" A% n, s: q6 a( @
- g.setComposite(AlphaComposite.SrcOver.derive(value));
! n5 M% ~- f ^, q - }
复制代码
5 L: \4 \" K3 ~1 `& I1 v5 h9 S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。1 s/ V, F$ _: z6 u
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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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