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h) ^0 @! C8 O+ ? `7 \; c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。& T" {2 d$ I9 u+ ~& y* }
- importPackage (java.lang);
4 _1 V A0 F- m - importPackage (java.awt);
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: t7 U. a& P( @- include(Resources.id("mtrsteamloco:library/code/face.js"));4 T' Z0 S3 S% e* S8 G# n2 i
) ?- y( }( v& `! m- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; h$ ^# P" X2 N& ^+ `
( [+ Z8 U% H" ~ r: J- function getW(str, font) {8 a2 R2 x$ e+ a7 r$ U/ Q% a
- let frc = Resources.getFontRenderContext();
% g+ t* O. G8 O, G8 h" v9 j9 H - bounds = font.getStringBounds(str, frc);
! r( j9 F. _" a# B6 ^7 n - return Math.ceil(bounds.getWidth());
$ h4 j2 M( _3 Q. I - }
. L; S0 a6 ?- i$ \. k" l8 N( l- F- } - : q8 e' A" k8 S2 c; J" ~
- da = (g) => {//底图绘制" Y [# N' {% b3 c5 Z$ a
- g.setColor(Color.BLACK);7 u' E8 w F: j8 D6 @9 m2 Q
- g.fillRect(0, 0, 400, 400);
) w7 r9 J8 i0 l+ U! S - }- d( N2 U7 O! ]* @
- " m6 B2 @! F* ?" G
- db = (g) => {//上层绘制
1 F# p. A7 n' i* K2 K" n - g.setColor(Color.WHITE);
! i9 K+ l* Z7 A) r3 { - g.fillRect(0, 0, 400, 400);
9 ]' w' s' G/ w4 W8 ?2 f2 Y( t - g.setColor(Color.RED);/ h* f4 L8 f, h" W( n" n+ J
- g.setFont(font0);" O8 N( x4 c% a" |, R; x" o
- let str = "晴纱是男娘";& a( U2 H* D1 V( j0 Q0 s: l- [
- let ww = 400;9 {$ X" Z( [. M/ ~
- let w = getW(str, font0);9 u9 o+ q) S6 ]" Y9 N1 j/ Y8 U# D
- g.drawString(str, ww / 2 - w / 2, 200);
& @ H' f5 R. A; s - }
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- const mat = new Matrices();
" y) u+ m' T) L% c! Z$ N$ G - mat.translate(0, 0.5, 0);
' f2 n q- W( z1 z. G0 D - 4 T7 z. B7 v' H6 N% }4 ]5 S$ r
- function create(ctx, state, entity) {
+ s3 L/ j# l0 l9 E( Q8 ?% a9 u) c' Y% c - let info = {
4 T$ j* W" C3 a - ctx: ctx,/ g6 |3 F( i0 D. _4 b
- isTrain: false,6 N2 G& ]6 b. K7 X/ t
- matrices: [mat],
6 j0 n& N3 v, H& F; { - texture: [400, 400],
" C) m. P: N- B! ]* U: L - model: {' V% q" _3 N4 ?8 f( ~0 ?
- renderType: "light",
# f6 Y7 s8 x2 x/ k - size: [1, 1],6 n0 b7 I5 K+ N S$ @! _
- uvSize: [1, 1]4 Z0 x) W0 F; o. E
- }
* D9 d) r( M9 g* v* S - }
5 T0 J; H6 Y; t {) \& i - let f = new Face(info);
8 J2 f3 r7 o: q - state.f = f;
# j4 m0 Y6 y. @' n% N - $ a+ R4 l% t0 y8 M; |. |
- let t = f.texture;+ I1 O6 I4 G3 @9 J7 E5 u9 \) |" i
- let g = t.graphics;
, c8 d/ \7 q& O4 z - state.running = true;
: i) f) N3 s6 I4 q5 t - let fps = 24;
. ]1 t7 s; P( \3 N" Y% v5 y+ a - da(g);//绘制底图
; J$ g5 |7 \, f& N, i* `& N. V - t.upload();1 x7 T2 s$ c0 E1 l0 W
- let k = 0;
# s0 b! m6 m. W9 B D, P - let ti = Date.now();: U5 F0 M! u) |* y/ J8 a
- let rt = 0;
8 {+ X% _' j* Q3 c) P - smooth = (k, v) => {// 平滑变化
+ r/ E/ B# D( @9 }6 x% c% k. [ - if (v > k) return k;3 ~! B6 B% l4 ^
- if (k < 0) return 0;, q: T1 y6 d4 }$ u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; B1 R0 Z0 D1 d2 R( [5 k2 L( C' |
- }- |6 g2 G' ^9 X$ t: X) n
- run = () => {// 新线程+ P1 V* f+ ?/ }1 u7 n& `, d
- let id = Thread.currentThread().getId();+ ]( g0 m1 e% v+ i' ~
- print("Thread start:" + id);
5 e" ~7 i& R( z2 H! T7 Y - while (state.running) {$ W, F9 Q: Y$ B% |4 V3 J
- try {
$ g3 c" R. Q" P/ V A/ q - k += (Date.now() - ti) / 1000 * 0.2;9 V i1 A8 B$ G* x/ G/ G
- ti = Date.now();
. Q6 q; ]4 s& E4 ?& _' I - if (k > 1.5) {5 E, w- T" N$ {& n' g0 S7 u0 U7 ~
- k = 0;
/ ~! c) v+ p6 ?6 A+ C) j$ S - }
5 n$ m* U7 m6 I2 y - setComp(g, 1);: A4 _, F7 m1 D, O3 ]2 T! n
- da(g); P5 e: V8 t6 q6 v- p" i1 S
- let kk = smooth(1, k);//平滑切换透明度
. ~" b, T) K+ Q. J - setComp(g, kk);" k Y0 P* t# J; c i
- db(g);
7 v( E0 Y) `" s - t.upload();! k. p' l# t: Q2 P, O
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& s m$ h" Z: | - ctx.setDebugInfo("k", k);
8 y S& e( B& \; ^: Q! w& r - ctx.setDebugInfo("sm", kk);
$ S* `' G7 V, x1 J/ S+ Q - rt = Date.now() - ti;6 X$ i# Z! D6 X2 Z) l
- Thread.sleep(ck(rt - 1000 / fps));
$ }/ A, c) n. i7 A - ctx.setDebugInfo("error", 0)7 d9 l& U5 e p# C8 S6 K6 P9 `- p0 a
- } catch (e) {& T2 q: d' L+ c
- ctx.setDebugInfo("error", e);
) K, }2 F r: V( V+ a* n) ~; x - }( o$ Y& L8 D( c& Y8 r! z
- }
. \, a5 L3 T; P/ N4 e - print("Thread end:" + id);, O, S' y3 u b& M1 Y! C# e
- }/ P0 E) z: k8 b3 @" l
- let th = new Thread(run, "qiehuan");7 V1 q/ `* v. {/ @2 K
- th.start();
/ P" e: j6 I* \# R1 G/ g - }% ^1 C- K6 J- V V# q/ d( e
r' q' w' z; I( k8 F" J7 I0 W- function render(ctx, state, entity) {7 J3 Z4 p* @5 B! [* }
- state.f.tick();: Y+ ?6 G4 |& m6 d$ R4 I
- }9 L9 z% {( K$ K( X9 k) O
- * r) X+ v; s8 A- W$ Z) l0 k" A
- function dispose(ctx, state, entity) {5 b# i5 e' U$ p. I$ M8 @
- print("Dispose");
: T1 h6 A9 H3 I s# U) y - state.running = false;
6 C# r' a; j& F$ v( }- U - state.f.close();
$ K6 S; i1 w( T- e2 w# _ - }
. r8 w& n4 g# s
1 B' M/ U c. f+ B7 `1 J- function setComp(g, value) {. X. u v0 @$ c; i9 r) ~! l0 b
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" \/ h% i; g/ y8 `7 k - }
复制代码 / f9 l3 f5 ?; N s; F; b' f0 I
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。
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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)0 J, j* Z: |9 I0 B
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