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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 q' W5 y8 }. q; q2 ?- importPackage (java.lang);9 M( D q3 L* b% ~: x! a
- importPackage (java.awt);
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3 B) z ~. M6 x6 G+ e- include(Resources.id("mtrsteamloco:library/code/face.js"));3 A4 X: V1 l- b `. Y
+ I) [& N8 w, `% Z( I8 M- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. q: K$ ~$ O: R$ u6 |: n$ z. S9 a
- 9 }: U3 M( |0 T9 w& a* G/ a: h
- function getW(str, font) {; ~! M3 y3 }! d1 Z' x6 v
- let frc = Resources.getFontRenderContext();
C6 U' A: a% K- s4 z1 z2 `6 Z - bounds = font.getStringBounds(str, frc);
* M# {# l/ r$ `% v0 R" o! v - return Math.ceil(bounds.getWidth());
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- 3 ]. I* ?5 F, Y- D' ~0 p* g
- da = (g) => {//底图绘制
$ h. N! |: y* ]* ~) B - g.setColor(Color.BLACK);
$ s: @/ B; ]" s3 t - g.fillRect(0, 0, 400, 400);
& R. R A4 }$ b! g* I, W - }* o& f( E& X2 }& P$ b
- : _- }, U! W$ Z3 c/ `6 N% g7 N
- db = (g) => {//上层绘制6 W0 W3 B: U3 e6 m5 D- R( Y
- g.setColor(Color.WHITE);
8 O! w. }, r3 ^( n - g.fillRect(0, 0, 400, 400);
% @3 Q: `2 c: A( p+ v: Y7 D" z# K - g.setColor(Color.RED);! E% w0 O" O4 t! s! t
- g.setFont(font0);
/ F$ s- o9 g+ Y$ w' Z - let str = "晴纱是男娘";6 R4 w( t- W2 Z/ \0 m
- let ww = 400;+ {/ N4 [( \; g* p
- let w = getW(str, font0);
# a3 ?" ~ r/ m$ E; V {3 k - g.drawString(str, ww / 2 - w / 2, 200);
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: e/ w) U9 ^/ k# g0 Z- const mat = new Matrices();
. V7 ~) `1 Y- c6 q - mat.translate(0, 0.5, 0);
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, P0 @* h, B9 n1 C. k; d* O4 ^- function create(ctx, state, entity) {9 V" ?# Y" d/ N6 E
- let info = {
/ l7 F7 V8 \ S8 ]) O& e3 ? - ctx: ctx,
* \, k/ z+ W8 O$ T3 i f - isTrain: false,
' e2 I1 k& s9 N+ T+ ^; G - matrices: [mat],
9 F& R! g, n: S - texture: [400, 400],
, z8 O: O5 C- t/ O6 ~; z - model: {# Y4 s& p9 C: \! b4 S' m7 n
- renderType: "light",3 a2 P+ X$ ~$ Q' r- y: I) f
- size: [1, 1],3 U, o0 Q: C: s( V; c7 N0 d
- uvSize: [1, 1]
. K3 v y5 d( _4 t - }
# n+ p0 f6 F- d' C: _ - }
2 B% X# w; n8 n - let f = new Face(info);
! u/ s4 x/ s3 n4 n+ \0 \+ c - state.f = f;% t C1 p% p! U
) J- h& A- ?& N& F- let t = f.texture;
1 S* D+ b% x0 T4 {* n* c6 ~ - let g = t.graphics;, D& k r" A& [) J7 I C( l
- state.running = true;+ x( |8 X5 Z5 }5 t; X
- let fps = 24;
3 O# V' d# }/ e! ]2 D4 H2 M8 U; ? - da(g);//绘制底图
: I c" \, E5 `" \) X+ k - t.upload();* A8 ?9 s0 ?. E: p4 [) m
- let k = 0;
$ e$ f W5 Y5 t/ J" P - let ti = Date.now();
) U1 c3 f' c! w# n) L7 g - let rt = 0;
+ x7 c* e; Q+ p( y2 ]( l - smooth = (k, v) => {// 平滑变化0 N1 i; x( f8 `, {( L
- if (v > k) return k;
1 o* R1 J$ P) C6 u* m2 c. a1 } - if (k < 0) return 0;
4 |$ J# }9 e- L- s1 x4 X; | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 T* n: N/ F$ e9 {" n
- }
' M! Y3 Q& ~0 ]3 P; t4 D - run = () => {// 新线程
+ w: e. w1 {" c6 ^% e5 L - let id = Thread.currentThread().getId();
. K4 T) g9 B& ` - print("Thread start:" + id);4 d: n" `* W. }2 K$ u
- while (state.running) {
+ w* i3 w, I; h8 b" l - try { g. C+ D3 ]! E9 p. Q/ Y- p
- k += (Date.now() - ti) / 1000 * 0.2;
- y& |' p& S Q! j+ T9 B - ti = Date.now();0 h* X& N, o1 ~5 E+ \
- if (k > 1.5) {: ]5 l1 f. z" @
- k = 0;
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- setComp(g, 1);
S9 W: A% J- c' i: d' C& x - da(g);1 A: c' q" {% v
- let kk = smooth(1, k);//平滑切换透明度
% R X- Y9 m5 O - setComp(g, kk);
) s; N: O$ N& Y7 H - db(g);; I2 b! `5 ]# d( k
- t.upload();
- [3 S& c7 T( ?- y - ctx.setDebugInfo("rt" ,Date.now() - ti);9 m' S7 m- j6 `
- ctx.setDebugInfo("k", k);0 {* Z5 ` I+ b
- ctx.setDebugInfo("sm", kk);9 G' Z, [7 f( w( S4 V
- rt = Date.now() - ti;
& S& K, s1 d/ K p U - Thread.sleep(ck(rt - 1000 / fps));% {$ C8 l0 b) A- `
- ctx.setDebugInfo("error", 0)
0 T+ R8 u! R% I0 A3 d0 b - } catch (e) {& n2 w( e2 \+ u" {
- ctx.setDebugInfo("error", e);
% W! v" Z$ L: k9 X - }
' y' e2 ~6 r7 @6 I6 w1 t& D - }
9 ?; I8 v3 U1 N6 @# m; Z - print("Thread end:" + id);
8 \" ^9 ^7 n6 Z9 ^) D' V; E# h - }
: ?3 z/ h8 C' M - let th = new Thread(run, "qiehuan");
& F* B4 g7 l, v5 G4 y - th.start();' U( R: n& T+ C4 K$ ?8 H; |: F
- }
- e9 o" V3 \9 e8 E& r/ F
/ ]$ |% x4 U/ N' |' |% |0 Y, b- function render(ctx, state, entity) {
8 w, A+ J* X. ~- k0 y( ^0 h% u - state.f.tick();
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# u0 ]% {' g, I' _, L3 d9 F- function dispose(ctx, state, entity) { q: ~; z0 V5 H7 S
- print("Dispose");
' h5 o6 @: w8 Q& n8 P( o- R( { - state.running = false;- _! w S% E" Z+ r& {
- state.f.close();1 Q R1 v8 V2 F* p! R# v
- }2 d$ c' B2 e& `
- 2 H2 P7 L2 A1 w
- function setComp(g, value) {3 B8 {1 g0 s1 A% u. l6 F$ m
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 L* _* L" M3 L: }( F - }
复制代码
k5 m4 Z$ h- H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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