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1 h7 L+ M- v' l# K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。
7 w& N" O8 n; f/ }0 A- importPackage (java.lang);
. U1 {5 t7 M7 o9 v" s `" v8 s - importPackage (java.awt);/ y5 V! B* |# @8 c
- & i. x7 ?6 H4 ?+ g( T/ }0 V$ d
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! M: v3 h' z' q% x" ]) Y F
- $ m, m V7 w( B, ~; k; z4 k9 h
- function getW(str, font) {
% {: D* j( K4 b6 U3 n - let frc = Resources.getFontRenderContext();6 q! b% Z. l l$ L$ a& _
- bounds = font.getStringBounds(str, frc);
8 H( @& u& C" ^ F5 P W6 Q& r# F7 ` - return Math.ceil(bounds.getWidth());- _8 a+ v/ J" b: p: ~0 D% u2 P9 _* g
- }) W4 `; x; @) m" n- K5 X% ]
7 D' n* J$ g* T8 T- da = (g) => {//底图绘制2 s9 L. p; m( @9 m9 O
- g.setColor(Color.BLACK);
+ c8 G0 t8 ] d! M) o$ r - g.fillRect(0, 0, 400, 400);
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- ) R ?5 M7 W0 D1 i1 ]5 D1 `
- db = (g) => {//上层绘制3 w1 Z( ]9 ^& ^, G0 U. @( Z
- g.setColor(Color.WHITE);
) @1 |3 Z. @1 o3 p& J8 |7 U - g.fillRect(0, 0, 400, 400);
" J+ h7 y: n+ e; G6 l. k - g.setColor(Color.RED);
; F/ t: V7 Q N% a7 S- q5 ^ - g.setFont(font0);
' \0 v; }" {! E" f% E! B7 n) G6 O - let str = "晴纱是男娘";
" h/ d5 B* Z0 l" Y# M& @ - let ww = 400;
, j* E1 N7 i! }5 `5 I& V - let w = getW(str, font0);
- N! x6 i! y u0 ?2 j5 p0 k- q - g.drawString(str, ww / 2 - w / 2, 200);
) v8 |) ?' k$ G& h1 P$ J1 d+ z - }
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3 `" ?* l, ]0 J l; ^- E$ b- const mat = new Matrices();8 L) z1 [" D# @' A' `$ [* C, K
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
. W: Q( D- C; f9 |8 C - let info = {
7 D9 t) l8 T! l; h- v/ } - ctx: ctx,
+ V0 U* H+ T5 L. r - isTrain: false,
- j* x, k- ~; `: y6 A - matrices: [mat],+ [9 x1 Q0 e" z. n
- texture: [400, 400],2 b! z. ]5 Y, o2 W
- model: {0 t2 a3 q0 N* m! z: t! h
- renderType: "light", f2 M5 \9 Q' H: V% f' f7 S) G
- size: [1, 1],+ N. m. n/ d. P2 P( H
- uvSize: [1, 1]
+ u$ E. M$ m: L - }
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- let f = new Face(info);7 X* B# O1 Z% I# D1 h T, y- d
- state.f = f;+ A' X0 k+ o e# Z
- . k2 o v, X1 O- O
- let t = f.texture;6 b3 O) ~# o/ t8 Z' {* h: |# y0 _- T
- let g = t.graphics;. C& `2 V. I/ H7 D( A# s' ]' N
- state.running = true;
`( d/ d0 N+ r4 Z C0 v0 Q, i6 v" u - let fps = 24;
- o& C# @/ d- K) \ - da(g);//绘制底图
{% [8 A7 B! v# L! R4 l* k( W4 H7 U - t.upload();
6 b- `4 r2 ?4 t2 _ - let k = 0;
, K3 l3 g# ^& v/ d5 m - let ti = Date.now();
0 | \; n9 d, J9 P2 n* o9 n - let rt = 0;" s. f' d+ d# L' H+ \9 w
- smooth = (k, v) => {// 平滑变化' M5 t( D1 B' o! t9 ~6 [
- if (v > k) return k;1 w1 Z$ V* n) ~7 v
- if (k < 0) return 0;
# P s# y5 G( M X' A/ } - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' n3 v$ V$ k! Y8 Z" m7 T
- }
1 W% P5 v/ s4 C" E - run = () => {// 新线程; b B3 q; q5 Y3 N$ ` r
- let id = Thread.currentThread().getId();7 i9 h6 R1 M9 u2 N: g* y) M2 x% o
- print("Thread start:" + id);! \$ y, I# D* r2 C6 T$ b/ h1 I/ c
- while (state.running) {
' V( _( K# y( u: O8 |& N - try {
& ^! q& \0 V, W& P - k += (Date.now() - ti) / 1000 * 0.2;1 s6 g/ l( f" ^" J
- ti = Date.now();
$ K) w8 W! D: }$ I" y - if (k > 1.5) {
9 P5 o' c) o8 J0 e+ p- V - k = 0;. S$ V3 }' m1 g, W( K
- }
+ ~5 s {5 r" ^/ O9 |. Q - setComp(g, 1);+ }0 u4 h* S$ e+ w0 Y( v
- da(g);
: m1 x" w; F& z9 N* { - let kk = smooth(1, k);//平滑切换透明度
8 I, b* D3 a3 e a- E - setComp(g, kk);0 Y" V8 D8 S* m7 P. p$ O+ s5 ]5 f" Y+ h
- db(g);3 S& J3 d- `# q
- t.upload();+ m. u! y+ u7 V
- ctx.setDebugInfo("rt" ,Date.now() - ti);
' O; U# n2 X" D1 G' G9 Y, F - ctx.setDebugInfo("k", k);
* L% b- e% w. c0 X+ t - ctx.setDebugInfo("sm", kk);/ }0 G8 Z1 B0 C
- rt = Date.now() - ti;# \& P8 ]( A$ X) x- f8 r
- Thread.sleep(ck(rt - 1000 / fps));% L2 v+ N" v# Y }6 P& W/ _4 t) i
- ctx.setDebugInfo("error", 0)% V T5 {0 L' D/ ]$ {- |
- } catch (e) {
/ g# J. u# M3 D- Z8 @5 B" a - ctx.setDebugInfo("error", e);
! r, b. r, G# V0 Q7 U7 o4 O - }
( a1 f& n6 j; r1 M - }
) {8 Z, z2 R) L4 h+ Y v9 X - print("Thread end:" + id);8 R: R7 b& G. f! `4 R S7 r7 \
- }
1 Z$ G5 h4 C! e) b" t! _ - let th = new Thread(run, "qiehuan");' ~1 H; |" a P
- th.start();" y" ]% D: h; J! n4 Q+ \' y
- }
2 x8 z) H. ]. p" @1 \: E7 V* Z - ! `5 a8 J3 G) [/ i- k1 h
- function render(ctx, state, entity) {- x; B* G1 c& r2 U
- state.f.tick();( ^& C5 x3 M4 H0 ~0 Z% i" N
- }
3 n' |; [ E, \) E/ A: ]
7 X, i! Q; S+ V1 b( z4 V# U- function dispose(ctx, state, entity) {
. ]$ D; Q K+ u; C. T7 g3 M8 p - print("Dispose");/ B! D- I1 y' g6 O/ R7 j
- state.running = false;/ e. Z! m, ~8 U0 h8 f
- state.f.close();
. d n$ Q1 k' C - }/ X' D$ a' l0 o! a f0 e5 o
- + u, g; _( p& X2 j; h
- function setComp(g, value) {
" L. @ l y0 ]2 J5 J/ H/ Y - g.setComposite(AlphaComposite.SrcOver.derive(value));1 _" X& u& m2 C2 P- o
- }
复制代码
0 }, e( H4 U1 _2 d5 d) b( 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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+ k- M! Z& x! a, Q. {" 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), ?$ [1 v: ~% q5 V. d) {9 [
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