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# E3 b8 E x7 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。( F$ H1 L7 H6 G! X3 C9 B3 d
- importPackage (java.lang);. g7 d, Z& p: [
- 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);3 ^6 ~4 W8 ?9 l, I, ^1 p, q r
5 r0 G' R) S# J, j- A5 U- function getW(str, font) {% y1 Y- j! C6 w$ r5 Q) k4 `% Z
- let frc = Resources.getFontRenderContext();5 N4 L3 G9 C) g+ v; ?
- bounds = font.getStringBounds(str, frc);3 M" |1 A7 Q4 F3 e
- return Math.ceil(bounds.getWidth());
% ]2 a: p, K) f/ e" X. Q1 b - }% R4 V9 w9 O: U. U
- : c$ c6 e4 E* j
- da = (g) => {//底图绘制
- i: `, W) V6 D ? - g.setColor(Color.BLACK);
3 n1 j. b8 s G - g.fillRect(0, 0, 400, 400);
0 e/ Y1 g1 ?' ]+ H6 ]& G) K6 K% b& `/ r - }
7 r! ~7 `# J3 r5 @, Y, o
! s& t3 ^7 y3 e# g$ X3 m& b7 }; l8 [- db = (g) => {//上层绘制4 V9 m2 P. j" C/ o
- g.setColor(Color.WHITE);
/ G& W! x* K, T8 P- z - g.fillRect(0, 0, 400, 400);
' t6 P- z( N0 h( F/ ?" ? M8 k - g.setColor(Color.RED);
9 G) W L$ M) Q0 i9 V - g.setFont(font0);
- k- c+ @0 ?7 D! R* v - let str = "晴纱是男娘";3 ^: [/ n: S% L; U- ^- C% L2 j4 {
- let ww = 400;) u8 z/ |/ w/ d6 \' y' ^, O
- let w = getW(str, font0);0 k# i4 f" I: R# H) |2 F6 k- Z
- g.drawString(str, ww / 2 - w / 2, 200);7 q# S! u1 o7 S7 n% g3 q: Y
- }
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$ K8 u1 z r* U/ y; s; V" \, F7 u9 n- const mat = new Matrices();
/ Q0 u i2 D4 R/ x7 t - mat.translate(0, 0.5, 0);
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! T7 A* b; o2 F. J9 A- function create(ctx, state, entity) {5 u$ Z, r" b1 n: ]' U
- let info = {: N2 P9 |0 }; p
- ctx: ctx,; G" |2 E4 h- J
- isTrain: false,9 I9 u( I: d6 H6 E6 m5 j6 Q
- matrices: [mat],
1 H8 w$ F9 ?7 L - texture: [400, 400],) c( \. s/ E8 I& _6 l% g
- model: {
9 ]( J* ?# l' d3 F ~5 R6 j - renderType: "light",/ N& R0 j( K# }. I
- size: [1, 1],7 |: U( e3 ~$ M8 ^
- uvSize: [1, 1]
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- }0 H* e1 K# [3 W8 O1 i6 Q# T* x" T8 M" D
- let f = new Face(info);
- Y i/ z n' q; ]+ d3 F! i; P - state.f = f;
0 _) R" T+ `* ], ? - 9 a$ k2 O3 Z5 m0 P( G
- let t = f.texture;4 ], _. J6 X3 m7 _2 r
- let g = t.graphics;
% {7 z; R: q+ M - state.running = true;- ?1 v, I. c, p% q/ G) I* j
- let fps = 24;
! V) o& Q. M5 q% U! I. k0 y - da(g);//绘制底图
% G) v6 a. r( b# t7 v$ U - t.upload();8 d* R2 S/ Y$ R: ^6 O
- let k = 0;' K9 G" F; d- Z! S
- let ti = Date.now();
6 {: ]: `* R4 M& B f/ { - let rt = 0;# s9 w: t9 i: ~6 {% P; w
- smooth = (k, v) => {// 平滑变化
2 e" n9 ~( g3 M" I - if (v > k) return k;
# ~! ^3 I6 w4 b1 X& e - if (k < 0) return 0;
( S# m9 o& ~; a1 B+ Z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( m! \! i- J& l% A9 U3 Q - }
% F# o7 Z1 B8 O: \6 S& N2 U - run = () => {// 新线程
: h2 E3 G( ~1 t0 S5 U - let id = Thread.currentThread().getId();
8 C5 ^* e% j2 f& R$ f( | - print("Thread start:" + id);
3 V6 j! ]1 ~( ]2 g/ X" U; U: k1 H+ @( D - while (state.running) {, A2 y" b$ t% a
- try {$ {5 p3 ?* `' J" i) O/ L
- k += (Date.now() - ti) / 1000 * 0.2;2 h2 e$ a: x/ t
- ti = Date.now();
' ~: s9 O1 Y. M; P - if (k > 1.5) {1 L$ }4 x1 c; {* U1 s( f% _
- k = 0;
5 d5 X& t- H6 u5 F/ @2 o - }
9 f6 C" F2 F8 I - setComp(g, 1);5 @- L% N% J. y% O4 N P# e6 s
- da(g);
! X, P# B6 K+ m& X; Y; i2 f% F - let kk = smooth(1, k);//平滑切换透明度6 O8 `- X! U' e: j- W/ X$ {' v
- setComp(g, kk);5 T% m% R( y# T; z
- db(g);( m: K) s A- Z0 S' u( z: J2 E+ B
- t.upload();$ o& a' v7 e8 D" r+ e5 q5 P
- ctx.setDebugInfo("rt" ,Date.now() - ti);
s" v0 _& R0 @8 A1 J) d4 [ - ctx.setDebugInfo("k", k);- R6 P7 N$ ?" ]6 F) b% u3 h7 x* b
- ctx.setDebugInfo("sm", kk);
& P# D W1 A$ k1 Z' R - rt = Date.now() - ti;
) _: g% @3 e7 c5 S( | - Thread.sleep(ck(rt - 1000 / fps));) s, U h$ e8 j8 {# X4 F2 Z7 T
- ctx.setDebugInfo("error", 0)" T" y0 t: ?+ I/ s- @. b
- } catch (e) {# `+ U' S& G P) j6 E2 @
- ctx.setDebugInfo("error", e);
q. ]: @! y7 J/ P - }) e! O& }0 Z7 w
- }, H; @3 c _" y! Q
- print("Thread end:" + id);
) u3 f% T1 g/ W: @6 c1 g. P I - }
0 D/ z% V, O0 F) o' d - let th = new Thread(run, "qiehuan");* h* e6 b3 X( L8 S
- th.start();) P" D. _" X: T/ I) I
- }
" [! Q) J$ q) S I: \
$ c3 [. o; e7 ~0 J( r- function render(ctx, state, entity) {: Z( M4 V7 ~5 q( d1 G
- state.f.tick();
$ o! F* G( H# L: X% e. ^ - }
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- function dispose(ctx, state, entity) {, k2 c# J; {9 m6 m$ m& b
- print("Dispose");
" o- `6 I' |- a5 R+ _ - state.running = false;
0 ]1 W- e) |! e- ? m0 N - state.f.close();
/ Z( p0 ~* _% `0 R3 { - }% N4 h1 b, B. e$ P8 q$ R; I9 P
6 z7 t# y G$ G- function setComp(g, value) {
4 X" \/ R' t, \% r - g.setComposite(AlphaComposite.SrcOver.derive(value)); e% Z( ^& k7 }/ h5 f9 k
- }
复制代码
# P+ `- o4 r' n, c6 j1 Y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。# t. f- F0 i* A
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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)) @ C" o3 }8 A0 U* y% U+ a: A# @
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