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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。9 a0 V, b* E# y1 O. t
- importPackage (java.lang);
; r2 K, i% ^. p3 I J - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));. r; Y+ L# N c4 R, T l
- 3 W& e& e) Q6 I4 g6 ?, t1 Y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
" Z/ [) ^+ Y/ C8 j2 u. ^ - let frc = Resources.getFontRenderContext();
6 D8 D# M6 \/ ~# P ^ - bounds = font.getStringBounds(str, frc);* N, p- Q! g9 m0 N3 v! z0 }
- return Math.ceil(bounds.getWidth());( n+ B6 v' ~6 G& P2 w% K9 T S% l
- }
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' q! S8 O, i* N, X- da = (g) => {//底图绘制. C- V$ w: J( W* t0 d5 L
- g.setColor(Color.BLACK);
, B( k" {/ P6 _3 J) y" ?% L - g.fillRect(0, 0, 400, 400);
+ `/ C! r- M6 Y/ C - }
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- db = (g) => {//上层绘制
5 a5 P" r f( d) b- E" B& s - g.setColor(Color.WHITE);+ S. u S. L( u' @6 [
- g.fillRect(0, 0, 400, 400);/ X+ T# r8 w2 }" o* E7 [; \
- g.setColor(Color.RED);3 L' I; R+ V2 P8 s* U) ~
- g.setFont(font0);
7 m/ ?4 I2 X% y - let str = "晴纱是男娘";
3 L/ [/ G/ o' B - let ww = 400;/ G& Q6 `* Q& Z) h
- let w = getW(str, font0);' t0 w8 e4 G# r6 `3 ?
- g.drawString(str, ww / 2 - w / 2, 200);
; R0 H1 Z7 n4 x - }
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- const mat = new Matrices();/ [+ b m$ N; m
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {3 e! }" w9 L; e# @) l" X: O
- let info = {1 S2 C7 E q; v7 J5 c+ L+ D4 H
- ctx: ctx,
8 n7 r& k& t7 M" f' Y - isTrain: false,
) h7 n+ M& h2 [ - matrices: [mat],; ~0 S9 C* Q* `6 Q% x
- texture: [400, 400],
9 O9 F! ^2 P s8 \ - model: {
% V* q; g6 ?+ S: b, w0 G2 | - renderType: "light",' f0 H% ?, K6 v4 a$ e x
- size: [1, 1],3 o V; w1 q+ v8 R" T2 Z; b$ }
- uvSize: [1, 1]
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- }1 y) m1 \1 x, D1 y7 T" Y+ g" j
- let f = new Face(info);) h; F5 n A$ ~- Y( u3 C
- state.f = f;
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- let t = f.texture;
6 V$ r, g \, Z5 g3 O f9 }% |' y - let g = t.graphics;
" `/ F7 F8 t2 O' U9 f( f - state.running = true;# \+ O$ A, L, ?8 i
- let fps = 24;
2 m; G% a, M" z7 R8 { - da(g);//绘制底图 c& p) O F! m! |5 R
- t.upload();8 J4 ]) ?, n1 w1 v, J
- let k = 0;
4 n4 k% c6 W% @& p( h! T# j - let ti = Date.now();
3 n/ S: |' H& s. j$ ^ - let rt = 0;
) q, Z: t" A3 ]# N) g: K - smooth = (k, v) => {// 平滑变化
( o9 l: _: f8 @' S+ @: n$ Y - if (v > k) return k;
) l$ V( H8 s' A4 z - if (k < 0) return 0;
' h. H* x; ~1 x4 q& W, T6 E0 p; ? - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
9 U# A7 A+ Q$ V, p$ q - }
" M: t1 y7 a, d; w4 X - run = () => {// 新线程
" S3 ^. y' Z; O6 d3 u% A8 }2 i - let id = Thread.currentThread().getId();% u0 h9 p) [3 N4 X2 ]2 Q& i
- print("Thread start:" + id);8 n' K/ H; m5 k c9 \! d0 y# i- l9 A
- while (state.running) {
! J* N8 [. n' U" o$ G* N - try {; Q9 |& l5 J/ e
- k += (Date.now() - ti) / 1000 * 0.2;
# X% ?) ^6 d% G* P: @ h - ti = Date.now();5 c2 |+ ~3 ^" [0 U- x- L% H H
- if (k > 1.5) {
. Y% ~3 Z9 g0 W9 x' C - k = 0;
) g. f8 u1 c& F, W6 Z9 j' ] - }
( S7 y5 }2 d6 D; f6 Q; M - setComp(g, 1);( H) [6 n7 u' Z+ \
- da(g); g0 F$ M1 C2 j& X8 I
- let kk = smooth(1, k);//平滑切换透明度- F( O) V/ Y" l6 Y( t
- setComp(g, kk);& u! M; K& w* P5 \$ Q. O
- db(g);& W H" w/ n* h2 G4 p% f
- t.upload();
; c- f0 ~0 ?" R+ a8 Z" q ?6 q - ctx.setDebugInfo("rt" ,Date.now() - ti);0 O$ Y8 H( B1 p% g5 m: m1 m4 k
- ctx.setDebugInfo("k", k);+ q6 R* R; Z% N) ?' `0 m) I
- ctx.setDebugInfo("sm", kk);* D- n- D" M' a2 V3 u* @
- rt = Date.now() - ti;& b) j5 l- v6 I2 P
- Thread.sleep(ck(rt - 1000 / fps));
/ q7 a7 B: n# z) K+ ^ - ctx.setDebugInfo("error", 0)
# z. w; @6 L3 ~& L# A+ Z- J+ V8 g - } catch (e) {
2 |/ i' I3 p5 [0 k. I, J - ctx.setDebugInfo("error", e);
2 n' b2 O! P. v. z, B - }. ^+ X/ Q& [+ r+ {
- }
) |& [" {$ h$ Q6 ]1 c - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
# _. Q4 a- T7 {- \2 g - th.start();" w2 |+ U. @, k, ^
- }- b# j9 O& H/ o& N6 [
- 0 t. L* d/ u X) _5 {5 F8 U3 c
- function render(ctx, state, entity) {
. i8 I; U2 J; _1 s- G1 }. N% h6 _ - state.f.tick();$ ]9 B5 B, S2 a7 F1 t
- }
) Z$ b& S; F9 I# s
- ~+ ]" Z% Z# N" n- function dispose(ctx, state, entity) {
3 r# L4 S& Z9 f: N8 W% u - print("Dispose");' f" t& f/ \4 @
- state.running = false;
6 |3 X4 B! X P4 Z - state.f.close();- X0 g* E9 X2 y6 g( S; H
- }
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- function setComp(g, value) {* E6 `! }& H# n, z* E
- g.setComposite(AlphaComposite.SrcOver.derive(value));
; k8 B3 L4 {7 A$ m- A0 a& v" @ - }
复制代码
; t D( } R+ G! _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), @7 q4 n( \0 u3 _/ K% I
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