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; L! y. H* G$ L; W7 s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。( E5 K9 @7 M+ P0 f3 [
- importPackage (java.lang);& l+ {. r$ P: c5 Q+ R1 [) [6 l
- importPackage (java.awt);
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- 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) { p' Q6 U# L+ R6 Y
- let frc = Resources.getFontRenderContext();+ v! f' K! w8 n8 M5 \2 \
- bounds = font.getStringBounds(str, frc);! x7 d7 B4 }; c) @9 c
- return Math.ceil(bounds.getWidth());" t0 m. f6 _* s
- }6 i. C$ p3 O2 h$ ?! g
3 F8 G. Q8 S e* Y; [- Q, m- da = (g) => {//底图绘制 e2 |" q: L6 u) K3 O
- g.setColor(Color.BLACK);
0 x& D1 [! Z i/ c( I! P - g.fillRect(0, 0, 400, 400);9 f; M! ^- K1 `5 q% Y! G) k
- }
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: q2 W/ _/ I1 h. E3 n7 D0 G- db = (g) => {//上层绘制
* S3 s# s- B( ~+ K/ R% p3 Y, E4 Z - g.setColor(Color.WHITE);
6 V6 p3 V8 d+ ~) t+ y. E5 p* ] - g.fillRect(0, 0, 400, 400);
1 N$ }& o, B- `# B- E9 ]8 c - g.setColor(Color.RED);
! ~1 M$ r V- q& @; c n - g.setFont(font0);0 |3 ~- s' Q. z( @5 U3 J
- let str = "晴纱是男娘";: x# m5 Y/ {; u% L
- let ww = 400;2 o! w- `6 Z" O1 c+ P5 W
- let w = getW(str, font0);
& B4 q j6 p+ d/ o+ i' B - g.drawString(str, ww / 2 - w / 2, 200);
) Q. c" y1 x. K* q7 Y - }
( e; O; p% H/ G9 e8 i9 N2 {
8 P! ?$ w$ J+ i7 O) m- const mat = new Matrices();
, d% C- L- E7 S8 L - mat.translate(0, 0.5, 0);
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/ v) I+ K3 s# w1 Q$ n6 h& t- function create(ctx, state, entity) {
" S% R8 N1 R, a# @3 H2 P - let info = {
: Q4 `) W! t1 `+ }$ L* P1 O) } - ctx: ctx,5 N. J: d" a6 t n
- isTrain: false,
3 z2 ?8 Z2 P. ~# Z+ a/ _1 ~$ N7 n# N - matrices: [mat],- r: u3 A% W, b7 f$ b8 R/ t7 ?
- texture: [400, 400],
; y( v" _. k4 g9 y) L2 d - model: {9 G C. M% _- p2 e! W5 s% |% q
- renderType: "light",
o8 T: q1 f* H - size: [1, 1],8 h3 `$ `9 A6 M5 G, K' E3 E' G
- uvSize: [1, 1]; v6 O& b' P0 H* _+ ~9 t j
- }
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- let f = new Face(info);5 X* ]5 r3 L9 ~2 ^" K, b
- state.f = f;
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2 I/ i6 n0 I: i: D- let t = f.texture;
4 J# {5 R2 W. x! W2 `" I: s - let g = t.graphics;3 G6 ]. x$ ?$ t$ S% a# s, C
- state.running = true;
* O! r" C. ]2 A- o4 z5 g$ M' A+ f - let fps = 24;
, p" ?6 z7 [: j+ p- I/ o: K - da(g);//绘制底图/ F$ M* u4 a5 l' W0 t# Y
- t.upload();
2 z. v0 O" N0 _ - let k = 0;& f1 V% u0 T) ^
- let ti = Date.now();0 j6 D4 B' z1 ^+ ^) C
- let rt = 0;6 M) G% k$ w- L2 Z5 z2 x( X4 h+ l
- smooth = (k, v) => {// 平滑变化1 }. x! o- }3 j3 X L
- if (v > k) return k;* q( J% e" A8 S7 c$ x8 b6 V/ ~
- if (k < 0) return 0;
( I: ~: v3 i5 C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% N! \4 k; l2 Y( t+ [) _9 k
- }: i2 F5 K' ~# E' K7 e m( G
- run = () => {// 新线程
8 O& J8 [7 b. {9 c - let id = Thread.currentThread().getId();
. \* m2 y) f9 G, c0 n: ~ - print("Thread start:" + id);
$ M# A2 A" K4 v - while (state.running) {
$ U4 W `8 ^; F# _ b: T3 C+ k* B) d - try {2 T$ ]' r7 d3 [ _
- k += (Date.now() - ti) / 1000 * 0.2;
' Y6 q& A; K( g/ z - ti = Date.now();& `* y8 T/ v! G9 x: y- _' q
- if (k > 1.5) {
% ]) J9 d. T, u7 Q# S1 X- U - k = 0;4 T1 T9 \( l: v7 J6 T! N, l
- }
0 }8 j5 m% X7 b, e( e2 u - setComp(g, 1);
* K. Y& X; I( Q& z$ }1 v2 ~2 G - da(g);5 M& f7 l5 `! G6 a- N/ k: j* K; E
- let kk = smooth(1, k);//平滑切换透明度
7 i$ J' R. J; b+ P9 S3 i/ f& @ - setComp(g, kk);
/ }; X) w" t- i3 ` - db(g);- V! c X: s( P8 J) z; m7 i: p
- t.upload();4 ^, |, |+ S: }
- ctx.setDebugInfo("rt" ,Date.now() - ti);7 V8 S3 L! U$ Y5 `# M
- ctx.setDebugInfo("k", k);
O8 A) R5 L5 t9 b6 N% J - ctx.setDebugInfo("sm", kk);
- k) G1 `1 k% ^2 c4 p. [8 t - rt = Date.now() - ti;0 q) p. F4 g1 z8 w
- Thread.sleep(ck(rt - 1000 / fps));+ Z2 `6 T) M( J& z/ ]
- ctx.setDebugInfo("error", 0)
: O7 I1 ?( T# Q5 _ - } catch (e) {+ a9 l3 l9 K+ T" e* r3 |$ v
- ctx.setDebugInfo("error", e);
% P' U+ _1 u3 z$ }$ m+ W/ J' X - }
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- print("Thread end:" + id);2 B8 O6 S2 g7 ]( j5 h
- }6 H1 s4 T2 h9 V; b- \
- let th = new Thread(run, "qiehuan");
# g% {4 r1 U% k) {( @; X - th.start();4 v: w: X) w! X+ [/ e7 ]/ z) E
- }
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- function render(ctx, state, entity) {& V0 j+ h/ R- j5 s- j
- state.f.tick();2 x; k& r$ G, K' u
- }% q8 q% n1 }, M
4 f f: f9 V4 Q8 N0 v4 ], Z- function dispose(ctx, state, entity) {
7 o. s) S! c R! g4 n. H' z: J* ? - print("Dispose");
/ Y+ ], q F+ A. g0 p( E8 L - state.running = false;
5 w6 h/ t7 I6 b2 u' h# w - state.f.close();
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- function setComp(g, value) {
* ~$ M) r) D4 V( I4 R% K5 B - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 m b4 J( p4 J$ y - }
复制代码 ' s. o6 x5 w- x% }+ i( l/ ?
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。$ h% p/ Q' Q" h% C- O" F
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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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