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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。
: K; Q, D y9 Y5 q' b; Z- importPackage (java.lang);7 K3 P1 ^, t F
- importPackage (java.awt);
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! V# I, B w: b' |( M4 K- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ Q3 W7 J o: |# z* d- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 w9 b' M! @2 _ j1 W% y
- / M' H' r% ~/ w1 c
- function getW(str, font) {
- k, d& a" S& C# z. Q - let frc = Resources.getFontRenderContext();+ ^ F' F3 H3 P$ G
- bounds = font.getStringBounds(str, frc);$ Z6 d1 s5 h1 G- X2 N
- return Math.ceil(bounds.getWidth());+ I: h# ?4 ]8 q0 ~1 J
- }
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+ k* d! V! p' N! \6 C+ U/ D. |- da = (g) => {//底图绘制! }; b3 R5 ~0 f' r
- g.setColor(Color.BLACK);; P: Y% i: k+ I0 }
- g.fillRect(0, 0, 400, 400);
2 w: X4 A; P$ ^# W3 S - }
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5 P6 v; A# j Z8 M4 `3 d( b$ `- db = (g) => {//上层绘制9 _/ l7 |- E a- ]+ p0 d
- g.setColor(Color.WHITE);3 u1 |1 ?' ]9 H- Z5 V& S
- g.fillRect(0, 0, 400, 400);
& v& ?2 c1 o, P3 P - g.setColor(Color.RED);! x6 n8 F! G: \
- g.setFont(font0);0 b) D' \$ r7 a0 ^! g
- let str = "晴纱是男娘";
* j% D. x2 }9 K, a) H" R L - let ww = 400;
" p, U3 a# a6 X- t. `) j' C - let w = getW(str, font0);
\5 T+ v/ b9 t' R/ L: \0 R - g.drawString(str, ww / 2 - w / 2, 200);$ D' U6 h4 _4 G" P! O. P
- }
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6 L/ i; K; m) z# f9 X* N- const mat = new Matrices();
3 Y! M% E5 O. [; w; [ u. ~ - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
8 X) i. @. n' N6 E - let info = {; |' L S( d- z
- ctx: ctx,
& y: C$ G/ x" ~# |7 E+ S - isTrain: false, p" q4 `) _/ x+ M5 B
- matrices: [mat],
# f1 A" ~# Z6 @ - texture: [400, 400],
7 ?2 V2 C' Y g+ D - model: {
% F( @& r. d" g- G; C% {* ?1 ^2 w - renderType: "light",
, l6 a) ^7 n* a5 l2 T( [ - size: [1, 1],
5 J; t9 E+ w% n- m: N - uvSize: [1, 1]
) f+ t' {& y0 ~+ k1 } - }
- U' w V R, |) V2 ]6 y3 U+ c1 N% c - }
$ Q! W3 I& q3 k6 j2 P0 m- j* L - let f = new Face(info);0 @/ i1 f) U0 J M9 o7 I" v
- state.f = f;* K% m, [7 d3 L( P; P
) S+ O# W4 I7 x7 p9 A1 g- let t = f.texture;
% O# H7 j; N* c Z9 F - let g = t.graphics;) G1 S5 j0 Z2 A% s# S" L# y" g
- state.running = true;
1 c) s9 c8 N; Z - let fps = 24;
7 Q7 h- D3 Q& [& _. I - da(g);//绘制底图
& g" u7 B2 i/ g7 f- A$ }! @! w! k - t.upload();
$ Y" ~+ A i2 _ U0 _5 d - let k = 0;: a# f A$ e# e
- let ti = Date.now();) R8 \4 g6 b4 ]7 s
- let rt = 0;
6 P& W$ P% M7 y9 [5 F/ W - smooth = (k, v) => {// 平滑变化
( h0 Q1 Y. p( O" N/ _& f8 K# ?% Q - if (v > k) return k;. b+ R4 T' n$ O9 o
- if (k < 0) return 0;6 w) k B) N4 C" |( S9 m9 `' n
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. i* y1 N. H, ?1 m( h
- }; `5 l. p+ V$ u1 `: h3 C, @2 d
- run = () => {// 新线程/ T x: _8 z [/ D q
- let id = Thread.currentThread().getId();9 a P- R9 x# r2 _0 b$ Q9 ?
- print("Thread start:" + id);
5 S6 e7 g k0 D, [- R; W! ~ - while (state.running) {* b& \" H3 V1 B- I7 S" e( W, E
- try {' a& c' L8 W6 f5 Q# j$ @
- k += (Date.now() - ti) / 1000 * 0.2;2 m) j/ u# H9 }$ Q& ]5 K; O2 i8 D
- ti = Date.now();
1 B, W% {4 [ O- Z - if (k > 1.5) {
. R5 }$ t' D0 }# W. Y; T' Y - k = 0;
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- setComp(g, 1);
8 M, g0 N8 h1 H# ~: j) G - da(g);
( Q; A1 B/ T c: n! q2 \$ t$ K - let kk = smooth(1, k);//平滑切换透明度& Q, Y1 u" z0 c
- setComp(g, kk);
( |. B0 Y. s# x/ m! C% t - db(g);
. X6 b! f3 N" T3 J# `' I N - t.upload();
5 \5 F$ r& v, Z5 |7 I1 |; [- u - ctx.setDebugInfo("rt" ,Date.now() - ti);
8 ~9 _4 c* ?+ t9 [: O( ` - ctx.setDebugInfo("k", k);
- S4 j4 r" U; E8 W# H) m/ T7 R8 U3 L - ctx.setDebugInfo("sm", kk);. D$ P! y# _9 o2 E2 L5 a+ Q
- rt = Date.now() - ti; C: }% g# ~* D. N6 Z& }6 o0 d
- Thread.sleep(ck(rt - 1000 / fps));
1 ^0 h! ?$ _9 b* U& l | - ctx.setDebugInfo("error", 0)
" H+ P1 C% ?/ Z: M - } catch (e) {
( c R9 q9 j* k - ctx.setDebugInfo("error", e);
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- }
' z* U; C+ k `6 l0 ]; }1 K. r, Z4 [ - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");2 P5 G: C+ Z' R# m8 s
- th.start();
& N( A& I ~0 D- c9 v% T8 [ - }
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6 ?/ x7 {% _+ Z( C- function render(ctx, state, entity) {
2 M5 p* r _- z8 c6 i' z - state.f.tick();
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) b4 L6 l' \" }5 }- function dispose(ctx, state, entity) {
% n9 Y6 q* R. `+ z - print("Dispose");
' A# W, O7 K8 M/ t - state.running = false;6 B. f, z& o& ^& D+ h$ i% L$ {
- state.f.close();
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- % x3 G/ Z2 O( _) o
- function setComp(g, value) {+ L4 v/ V) | I W" O
- g.setComposite(AlphaComposite.SrcOver.derive(value));1 y+ ?# ]9 X8 |" e6 Z( P, d
- }
复制代码 7 f; G* L' Z$ |
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)
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