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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。
1 f$ G, p% u& B \% O- importPackage (java.lang);
# s5 a7 ~2 n( W) ^( [/ _ - 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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2 x& p2 Z2 W, x; ~# Q5 D- j- function getW(str, font) {
4 ~4 T T* q1 `& H* a1 y- U - let frc = Resources.getFontRenderContext();
+ d8 l: o1 U( K2 }# J4 G! ] - bounds = font.getStringBounds(str, frc);5 ~- W# R- n( `& x+ U* y
- return Math.ceil(bounds.getWidth());
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- ; @: i9 E O' i1 I$ G: ~0 A
- da = (g) => {//底图绘制
; }0 n( ~0 s8 e, m' O3 s& W - g.setColor(Color.BLACK);
" U/ u# X( ^0 f* k8 J - g.fillRect(0, 0, 400, 400);3 R. v1 H2 H& G" d0 t- a
- }
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1 g$ s, {$ }6 ^) h$ {/ ^- db = (g) => {//上层绘制
! s7 J4 g! r# f! G T8 o - g.setColor(Color.WHITE); A; K. r; a; x/ s- ]4 H- Y2 A
- g.fillRect(0, 0, 400, 400);
' Y2 x t8 `& u) X) j N% t - g.setColor(Color.RED);; H* N$ T L) T* g" \) M3 }
- g.setFont(font0);2 @' x* y8 J; l/ m5 X! @+ B1 i# h
- let str = "晴纱是男娘";, f' X+ O% r* }; M
- let ww = 400;% ?( T9 g* |8 s
- let w = getW(str, font0);/ F& P# W* h5 Q/ i) y6 {
- g.drawString(str, ww / 2 - w / 2, 200);
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- 8 v8 O/ ~6 W# }) P9 n
- const mat = new Matrices();
2 D# Q: H- z. a& I - mat.translate(0, 0.5, 0);+ o- s; |0 W2 ]7 q: [
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- function create(ctx, state, entity) {
2 e+ V3 D# j6 b C6 c - let info = {6 w" g/ ^6 Y; k4 _
- ctx: ctx,
) w: M- K* K. ~ - isTrain: false,
7 D0 D5 s9 E7 p7 @# t2 Z* o - matrices: [mat]," C$ I1 O& Q1 z" U
- texture: [400, 400],
' n( J7 D7 p& A' f2 v* R( [ - model: {% a5 } @+ |- E& e: g( @$ `! x6 A
- renderType: "light",
3 T8 b3 n3 |6 G9 n4 D' F - size: [1, 1],
4 [! N( l( Q5 P8 C4 D - uvSize: [1, 1]
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- }
8 t& z/ T5 l: M6 s' A' w+ q - let f = new Face(info);
, T0 {+ b. @2 Q4 B( E# s$ ` - state.f = f;1 Y5 R" J5 x, b: q9 V3 [
- 3 h$ _* W7 u! Z' {
- let t = f.texture;1 R/ f- I. h" |; q
- let g = t.graphics;3 V2 M7 A4 D% R. |/ F$ Q' S+ M5 T! c
- state.running = true;- G% a' a& T: s p
- let fps = 24;
/ p/ y: n) l4 V& h. w - da(g);//绘制底图) Z* T$ | Z& L8 o z
- t.upload();
0 x5 u" i! w; I; J# H; _: g7 K( ` - let k = 0;# s) O Z& [' L, y3 M
- let ti = Date.now();8 q L9 |+ n4 P! d( S8 i# G
- let rt = 0;
Q" l+ ~$ s* ` ]. e7 s - smooth = (k, v) => {// 平滑变化
" @4 E5 u }$ L& o+ a - if (v > k) return k;+ X W. Y; s: |/ n' V% w
- if (k < 0) return 0;
' u9 `# ?- S) B - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 N* |& g$ }8 M _
- }
}( s0 G6 L5 f; @% M* P- E - run = () => {// 新线程" F1 u( `. C2 J) X
- let id = Thread.currentThread().getId();
) P* [1 T% t2 ~+ {& p# l& E5 b7 ~ - print("Thread start:" + id);+ M" A. o2 d1 I& p4 x. _
- while (state.running) {6 r& D. Q* H1 }8 u* p7 X* J1 M3 \/ T5 B
- try {
) ]* J. r0 p, G! _- ^0 g9 z0 M. ^ - k += (Date.now() - ti) / 1000 * 0.2;: a! A9 l2 y9 V$ a
- ti = Date.now();- f# l* R |- U5 D0 m# B" O
- if (k > 1.5) {
. G" v/ `* c2 o0 k1 f - k = 0;
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- setComp(g, 1);# j* O6 k- K+ ]- E5 y! L, E5 w
- da(g);
8 n4 @; F! Z5 n0 |9 f/ n4 f - let kk = smooth(1, k);//平滑切换透明度6 r! K% \" A8 S9 t2 W8 D# v
- setComp(g, kk);& f7 N9 [ x' V% F+ @0 |; h) t
- db(g);
$ S( O4 f! E% p& O- G - t.upload(); H' `/ `' A0 ]8 j
- ctx.setDebugInfo("rt" ,Date.now() - ti);
/ r( {+ f& \0 F - ctx.setDebugInfo("k", k);
* s5 Y: y% v3 A' `; L+ B - ctx.setDebugInfo("sm", kk);
' }, K# G3 ~: P - rt = Date.now() - ti;' ?7 `+ T# b) w& C
- Thread.sleep(ck(rt - 1000 / fps));
" c1 M; ~% m) m0 c" T9 U4 M1 ~ - ctx.setDebugInfo("error", 0)% o' S, Q$ @/ u( H: T: O4 J
- } catch (e) {) y3 l. P+ |7 Z9 W8 _* G! e" U4 T/ t
- ctx.setDebugInfo("error", e);
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- }3 i' R% O. m, ~1 f+ y6 i
- print("Thread end:" + id);' Z3 \" C7 ~0 ]' w) Z
- }2 M5 B# q$ P; Z& @5 y
- let th = new Thread(run, "qiehuan");
0 t/ A: x( F. n! K' T( _& i6 b - th.start();' X% v* F6 n3 |. f" E
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* E% R/ Y5 ~# x: _% O4 c9 y! y: @- function render(ctx, state, entity) {
$ S \, L% M: J" W - state.f.tick();
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- ( H3 U6 X) R) i3 d
- function dispose(ctx, state, entity) { k! j% Z( e( i3 U- T
- print("Dispose");5 Z6 ^& K5 T7 g3 y+ B! R
- state.running = false;9 ?8 l: K" l9 f% X1 F! l7 M ?
- state.f.close();) R& M. i F. k, v
- }1 D1 n' M1 O0 u+ q( U7 J) M5 Y( _
- 0 f! k- K5 H8 @$ d: `6 g) o: p
- function setComp(g, value) {
7 D# D3 J/ f* \5 D, V4 K- T+ Z - g.setComposite(AlphaComposite.SrcOver.derive(value));( I: Y( }% e7 P" E# ]7 f& u
- }
复制代码 ) h* G0 M- p- M1 {% D' Q) \; a 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。
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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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