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2 ~: `+ k, Q8 b. V! ]1 x9 B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。
4 _3 ^8 n5 {& p. b% F- importPackage (java.lang);
4 @) X5 f) y4 F5 [1 p4 _8 y. o - importPackage (java.awt);
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: x" k2 n& V7 l' L" E, @- include(Resources.id("mtrsteamloco:library/code/face.js"));1 q- t& W& ~+ a! M
- $ d+ O% _; D3 p
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- u+ L% {- |" o/ g0 Z' d
; B4 w4 ]- s. }& g6 K- function getW(str, font) {
! P# _$ i& q* e( U - let frc = Resources.getFontRenderContext();+ E9 P$ i: ~3 l6 H( _& O6 V5 [
- bounds = font.getStringBounds(str, frc);
. T0 l* X; y9 K5 u: x2 S% u - return Math.ceil(bounds.getWidth());
! N* e/ ]0 _2 {# q - }0 h! X, j! W; R/ X: u+ m( [" x) G/ ?6 E
- : F4 T5 R9 a2 h8 {1 R! t
- da = (g) => {//底图绘制
( H* r8 z1 I/ \- ] - g.setColor(Color.BLACK);; { D* {& Q- ]* o/ l6 h+ l7 n+ `: u
- g.fillRect(0, 0, 400, 400);/ g; w) {- `, @$ K2 C% \9 ~
- }! d0 Q' n8 U R) S8 z* C& D
- & w, o- p* W+ _3 C
- db = (g) => {//上层绘制! W% k5 F! i+ o3 n# b
- g.setColor(Color.WHITE);
4 N2 V- w4 U7 v. W) _8 Y! `8 K - g.fillRect(0, 0, 400, 400);
- N7 E% o H0 Z2 G& ] - g.setColor(Color.RED);3 h# `1 F2 L( }; P% r- i
- g.setFont(font0);* y/ B7 y7 J4 ~% \5 X, u8 p
- let str = "晴纱是男娘";
# W0 \4 q. f/ y" f' A! a) t - let ww = 400;* U k$ V9 a5 _/ Q! w5 y
- let w = getW(str, font0);
' T8 J1 I9 d, o# I! W1 z1 h: |' h - g.drawString(str, ww / 2 - w / 2, 200);
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4 h1 G' s9 {9 c3 i3 E- const mat = new Matrices();0 h3 }+ y; f; C w( b# t$ N
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {( {2 `7 Y. F, f; Y/ P: H
- let info = {, x+ ?1 y. e% P
- ctx: ctx,$ ~* x6 T# G. _6 f
- isTrain: false,
) ?/ o: L8 _ S A - matrices: [mat],, C! U# q3 T- y( R$ Z
- texture: [400, 400],, [7 ^- x. y! {; n/ c7 l, l
- model: {6 b7 o$ i, H7 \' x
- renderType: "light",5 n/ U# b2 J* F! F
- size: [1, 1],
6 ?0 e. P4 Z) G! D5 W - uvSize: [1, 1]1 Y: L8 I0 |6 Q9 o6 H7 J. k
- }
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- let f = new Face(info);6 A$ ]- Z7 y* L
- state.f = f;
, b5 \$ E/ {: ^. e) w, e# B
' f) X% a% S1 g6 a6 ]1 K- let t = f.texture;$ W% E% [8 w' R
- let g = t.graphics;
: P* r2 v0 b7 m; k9 H - state.running = true;- I a- C. K$ p
- let fps = 24;; ~* F" m: I1 n
- da(g);//绘制底图( C: _! e! x w1 G M8 c. U
- t.upload();
, h6 G3 N& A2 W: d, G - let k = 0;& z9 a( U+ r0 ?* [ J6 {
- let ti = Date.now();
/ {! @, R: p! t u3 o! t% ^3 R - let rt = 0;
. r' B8 s" B, D) t - smooth = (k, v) => {// 平滑变化7 |+ \3 `$ ^4 K
- if (v > k) return k;% ]$ W/ J, L& ?
- if (k < 0) return 0;
9 P- |# V0 [) v& [ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 | g7 o2 r, l* q - }5 i7 ?7 } T& G& \ N; s( O+ o
- run = () => {// 新线程, x6 x" a' P& P! u! X2 H
- let id = Thread.currentThread().getId();
& Y& R' z2 g( v/ z - print("Thread start:" + id);
; M- ]9 A. N: `9 |2 o C; f7 v" Q# P - while (state.running) {8 T1 V9 d, J) I- j9 D' |
- try {2 Y1 A- o- q; S6 I
- k += (Date.now() - ti) / 1000 * 0.2;' C6 c* b, L+ f) A, l9 r6 `
- ti = Date.now();6 S5 E6 k$ |" E p- V' m8 F) j: U. ]. j! j
- if (k > 1.5) {# u% o: L7 H8 V
- k = 0;
. ^3 r- y. \6 S - }
3 |2 D7 S4 @6 j# r# N - setComp(g, 1);
* J2 m. F1 Q$ M3 k6 I - da(g);
! ~$ b) c4 m/ r - let kk = smooth(1, k);//平滑切换透明度1 r, ?9 @8 n* K: X% O
- setComp(g, kk);3 g9 m0 K; M; ~0 p5 E- Q
- db(g);6 o+ A9 ?) V- V) I( b
- t.upload();
% u) K* S" G3 d7 _6 y s - ctx.setDebugInfo("rt" ,Date.now() - ti);
9 ]( G" n0 n' k t8 c7 H - ctx.setDebugInfo("k", k);* `% Y! Y: S( d% ]3 \( ?
- ctx.setDebugInfo("sm", kk);5 W! d. j9 V9 s. g/ T+ \$ V. u* S
- rt = Date.now() - ti;
9 Q4 t- c1 z. o - Thread.sleep(ck(rt - 1000 / fps));) j0 U8 O* V8 k* s2 N& ~
- ctx.setDebugInfo("error", 0)3 g* ]4 j1 W( r
- } catch (e) {
6 G7 _$ U' J- N& k, t- ~0 r - ctx.setDebugInfo("error", e);
* v! z3 Q/ V, C; D4 P' g" r8 h# S7 m - }
. }0 o5 g; n& [7 r4 }) h# i - }$ S8 j5 O, w# R2 V) O8 ~/ l
- print("Thread end:" + id);6 [+ W% z/ b! H5 B; R+ t' ?4 B: e
- }& g7 t6 f5 O, m' q4 k+ I1 q! Y4 t
- let th = new Thread(run, "qiehuan");3 z; x! W) r& r
- th.start();+ T( }, h4 P, j7 _
- }
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9 _, {) L ?9 G0 s- function render(ctx, state, entity) {% A( a C$ z4 Y* R! f/ V3 p$ P
- state.f.tick();$ w6 u5 N P' T: I. f
- }' o7 M* l/ V6 v" Q1 Q7 y9 b% w
- , T; q" A! B8 w: j; l. x" k
- function dispose(ctx, state, entity) {' i7 o3 p( O5 @$ B7 B
- print("Dispose");- \; Y3 R$ {5 X! }; D- P# u
- state.running = false;
# e) _4 n* h* q. ~8 r/ Q- h. O; v - state.f.close(); J/ d2 \0 ]; G s
- }
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/ o. i ~4 ] f) p8 W- function setComp(g, value) {
- V+ v$ Z N/ Z3 t - g.setComposite(AlphaComposite.SrcOver.derive(value));
9 G/ i4 d3 ?; P3 A7 X - }
复制代码
# u q% v% V6 Y- ]2 L- W' w0 F* 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。" I+ o4 F) f7 X& {1 ]8 S
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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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