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K; r, b% p" P3 f2 R9 U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。/ ^1 y1 ^. k6 J- N* _
- importPackage (java.lang);
# U8 Z5 d! Z3 i4 H0 B% b - 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);/ l# O% Y: h0 u& Z( ]
7 `7 J* ~# s8 r- function getW(str, font) {( q( U, @5 }% Q/ P
- let frc = Resources.getFontRenderContext();% l7 ^" s( w* p, R8 y4 I- B+ |& D
- bounds = font.getStringBounds(str, frc);
2 r- A. k' Y3 z x; z - return Math.ceil(bounds.getWidth());
7 N9 W; I. E k: a - }* ]7 n0 g2 r% N6 }/ y
- - B, K+ K+ u1 \! Z: a
- da = (g) => {//底图绘制
4 j7 F2 w8 D, P3 S* L - g.setColor(Color.BLACK);! M6 ]+ r5 ^6 s: V' a. q
- g.fillRect(0, 0, 400, 400);
+ p6 \7 \0 d! F/ M9 S& E - }
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- db = (g) => {//上层绘制. m" e: B ~" a+ B: i+ H. S4 `
- g.setColor(Color.WHITE);
0 c' C9 b- R4 ` ?$ C% ? - g.fillRect(0, 0, 400, 400);2 Y: M$ a5 U4 X& R
- g.setColor(Color.RED);1 V3 r9 u4 J" N7 v2 X7 ^
- g.setFont(font0);
8 N" o: H2 f9 F& o - let str = "晴纱是男娘";+ ` X9 \- r/ o; }
- let ww = 400;( O x" H/ v8 P8 V6 w8 V3 c
- let w = getW(str, font0);
/ r9 d6 r: G9 c6 s* O) k0 A - g.drawString(str, ww / 2 - w / 2, 200);
( I" M- w0 R- M d1 h* _ - }, E) E/ J( G- C% r4 k
2 t6 X- ?( g% o) w! A- const mat = new Matrices();
3 B; h8 |7 Z; N9 `3 o1 O$ [/ b; Q$ z - mat.translate(0, 0.5, 0);' ?; w* e J; d% {* V
- ; E, ]9 U; o+ }4 [8 `
- function create(ctx, state, entity) {8 {" K1 x3 t, L' {( i* B% A
- let info = {0 d; a* ^( ~4 @" v
- ctx: ctx,
" r: f4 Q$ T( p* u3 I1 D3 z- i) j4 Z - isTrain: false,
- ~& N. E7 f* g ` - matrices: [mat], u% ^8 ~1 U! O7 d1 j- h4 R
- texture: [400, 400],: l9 N1 D- \# Y% H8 u$ `3 I! S
- model: {
( S) Z" K3 L# e. T: }! I+ p - renderType: "light",: I8 J5 S( f7 C- {) q
- size: [1, 1],
1 F: L8 [8 s+ r* v+ s. j7 G# v9 \4 G1 J - uvSize: [1, 1]
/ s+ q* a& K" N. c) @ - }
: M( i' q- w: G! l6 G9 e: k - }' `: g$ J' L; G- O- k/ k& z$ K
- let f = new Face(info);
4 j1 a! E0 q& }+ T/ x - state.f = f;; l7 y7 k$ U' q( ^; H9 n9 e
- 1 r; u7 V8 p& T# F& L
- let t = f.texture;
% O! }, `' V; G$ X - let g = t.graphics;7 u' c3 }" Q, I. u( ]
- state.running = true;, w- @" H* z- x: g/ g+ E% a
- let fps = 24;
) {" `4 l m% t" j" Q - da(g);//绘制底图
" Z9 o0 }5 a1 D' V R5 A - t.upload();3 \ d* @0 ^9 H0 _$ x n
- let k = 0;
7 K$ t/ _) A! ~6 _: Z& R) } E0 H; Y - let ti = Date.now();2 J4 s8 E) J" W1 W9 u
- let rt = 0;0 F) \3 }. T i
- smooth = (k, v) => {// 平滑变化! `8 ], J' Y, I$ c$ M+ f4 x, j
- if (v > k) return k; _' [0 C N* p% ^1 P
- if (k < 0) return 0;
1 R+ n6 z" x0 }+ { - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 L$ \' l; p# L; J: b3 k
- }0 \7 u9 c9 C( h8 K5 m0 m
- run = () => {// 新线程
4 E% T# m( i! k: G - let id = Thread.currentThread().getId();" v& u( T/ i- v! m" P, r2 O
- print("Thread start:" + id);3 y- V. P; O6 ?1 @* w( T$ C
- while (state.running) {5 e' O; L# w3 V! [4 D& G2 V. D& H
- try {1 {0 Q% F! X7 ^- j
- k += (Date.now() - ti) / 1000 * 0.2;
( z" R. R6 ~- t( g - ti = Date.now();; e6 i ]0 b5 X" h( Y
- if (k > 1.5) {
* T0 j% U# ^4 ^, B' e - k = 0;
$ H5 R8 w2 {$ H3 Y* c2 o - }( V7 z7 l) U) l. g# w% K
- setComp(g, 1);
' R4 J- N6 z; ^4 C( r3 ^% D1 p - da(g);9 H2 N V) c/ t2 x e# D1 p4 G4 W* K
- let kk = smooth(1, k);//平滑切换透明度
" k% {$ z7 Y7 y+ b- x - setComp(g, kk);: `4 x$ |& U# a9 j! \# s
- db(g);
& f/ J$ m! A1 f. S- e - t.upload();
9 ~, k6 w/ p6 r' U: A8 ~5 l2 `9 O p' e - ctx.setDebugInfo("rt" ,Date.now() - ti);% H2 l% o: [2 b; }. [
- ctx.setDebugInfo("k", k);
' L5 Q$ D; {4 x$ R. n - ctx.setDebugInfo("sm", kk);
}: R s7 K# ^ V - rt = Date.now() - ti;
g3 e2 Z3 g9 Z: M( @8 Z; N - Thread.sleep(ck(rt - 1000 / fps));
9 b- F" P# p" R* s9 @! g - ctx.setDebugInfo("error", 0)
. ^; i0 B2 ^% e# x; d - } catch (e) {
. ^+ x8 c/ R1 ~1 b( v - ctx.setDebugInfo("error", e);- f# o0 p8 }; B; }4 f: \
- }+ P- U5 F" L+ x% U! a
- }8 {5 m2 E1 [2 s' q* S
- print("Thread end:" + id);
* | n9 c& e# J. P! g {/ q - }
6 i x( I+ V9 {0 V' E% Q7 o. k - let th = new Thread(run, "qiehuan");( T0 S4 w; X8 m; x" D+ N5 j- f
- th.start();
0 G6 x. E$ h! I8 j6 Q( M- d - }
# ^( V' M* A5 z( @9 n: V' ?
4 D! ~, f/ L: I- function render(ctx, state, entity) {
7 t+ }8 ]' e4 q) @" o# g$ i. f - state.f.tick();) N( }& F+ q1 P/ g- v) V. b3 {
- }& M0 W6 S4 _8 b& n% k
- p8 _/ y3 E" b6 {. G: e
- function dispose(ctx, state, entity) {2 A4 w2 i" @ S2 J
- print("Dispose");
+ D' l+ T& j9 J* d0 [) K - state.running = false;
5 l1 u- e* K$ u$ q" h5 o - state.f.close();
' C* U& W4 J1 ^% t2 ^ - }
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- function setComp(g, value) {
* Q) q! M; i7 @8 p9 F - g.setComposite(AlphaComposite.SrcOver.derive(value));5 E9 l3 _; ~% Z% M2 c# ^
- }
复制代码
7 |' a R* C1 d& S+ e; 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。$ [/ j* ]3 |4 W/ C5 ^% c! V
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4 {9 Q4 e$ ^. d# x9 _1 C顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)4 Q H: ?+ ?. O" r% m
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