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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。
2 p" f' \, k$ x8 d+ G& I, M- importPackage (java.lang);) x. J5 C+ b( S" m& b( O& U& d0 T
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));+ A( J3 e: e3 h3 J0 x; }
- ) a: q& u6 y4 H1 N, T* o
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 Y w4 n9 P$ ?) A# V* z) g0 c: h0 Y
- $ p$ v8 R* H' x5 r
- function getW(str, font) {1 g; u, a+ ]" u: a
- let frc = Resources.getFontRenderContext();
8 m' c1 R( i3 E5 {; `, n - bounds = font.getStringBounds(str, frc);
3 \+ _) v' @7 ]2 X2 U( L - return Math.ceil(bounds.getWidth());
! L. V: G4 p% H B6 X - }
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# @- _6 _- a. U9 ]" i- da = (g) => {//底图绘制
4 P( V3 T& X8 |- X3 d - g.setColor(Color.BLACK);/ C' O3 J( A4 Q% Y5 v* ]! W/ l) w
- g.fillRect(0, 0, 400, 400);9 d8 ?6 a! S8 u4 q4 j
- }) g- T* o/ j7 ]. {2 ^1 R5 I4 b% A
4 o+ q# }4 {; |5 E5 X4 R: U- db = (g) => {//上层绘制* o2 T; `# p* d+ l' e& y
- g.setColor(Color.WHITE);7 K/ r6 C8 m: N9 f
- g.fillRect(0, 0, 400, 400);
( ~& r/ e! `$ ^+ B - g.setColor(Color.RED);3 r0 {1 E9 r# L! w! Q1 C. c
- g.setFont(font0);
; e; C. S7 j9 V( D! |0 j - let str = "晴纱是男娘";' n3 H; ]+ O( Q) ]/ N
- let ww = 400;
6 [) w# L( m% z' O5 S! f( s - let w = getW(str, font0);6 {7 H% L k: c/ j
- g.drawString(str, ww / 2 - w / 2, 200);# @9 G, b7 q8 o2 `7 `/ M" p
- }- A. @& T% [$ ?& t8 E9 a
' c D9 Q3 Y' ^3 k% p6 r- const mat = new Matrices();
5 T; x5 w) g+ e, k - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
: s, L( P4 |5 e) _ - let info = {
) Y( `5 {" h/ R) j% l$ L' w# @( H - ctx: ctx,
% a# H* g+ f s - isTrain: false,
+ C! V) Z2 z8 K$ j9 _' z/ ]0 [" \ - matrices: [mat],$ e, U7 _3 Q, H3 v- D4 X; X
- texture: [400, 400],2 s1 a/ [/ Q, Q& \/ Z
- model: {
; L3 X4 a6 P% \; K% N$ @! o - renderType: "light",. u/ W2 k% Q8 s6 h# b: ^" H
- size: [1, 1],
( R( d( K7 m) u: ?! a \: @% i1 f7 _ - uvSize: [1, 1]
8 s! y! T, w7 o% R& W. ?4 x: _ - }
: |1 K: G( p8 W8 r - }
1 w$ E. c! [8 w( Q- b/ |* g7 G - let f = new Face(info);2 e- Z% I3 J+ v; b. X) v9 b
- state.f = f;/ C0 R; E( Z& ]( q+ Q9 E6 q
2 z' u B" M2 h1 e- let t = f.texture;6 o# a' ]! S. j, N* ^1 Q
- let g = t.graphics;
. V3 o% P+ a1 C& I; r4 j3 x) [ - state.running = true;8 q& A; Q: C9 c, {+ W
- let fps = 24;
/ C/ u7 ^/ S0 P; T# n+ ^ - da(g);//绘制底图3 H( f7 `6 G8 n3 \1 x. u V
- t.upload();) Z. ]* {+ V3 y) k. ~$ ]! k; b
- let k = 0;
6 I. r4 J. z# T/ i - let ti = Date.now();
9 \7 s$ Q7 A# h( u - let rt = 0;" S) k3 N5 b0 i2 X. ^3 T5 w
- smooth = (k, v) => {// 平滑变化, _' e( \0 V( F" L- N2 t& |6 |7 H
- if (v > k) return k;
. B9 ]0 T- j# R9 T1 W$ u. L" O- x - if (k < 0) return 0;
- n, L* K5 t4 A; _8 T4 S* C9 \ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! I0 L7 q& r& l: r! r5 I2 k3 F8 N
- }
3 O) l, _6 j# ?* H ` - run = () => {// 新线程: Y' g% X) W' w0 ?- j0 M
- let id = Thread.currentThread().getId();) R8 f& w& @- l( K, L" {- \( P; b
- print("Thread start:" + id);8 M! x& [; y. y
- while (state.running) {2 O+ j ^" ?0 g: W
- try {
4 p7 T" z9 _2 x" [6 u0 L8 V - k += (Date.now() - ti) / 1000 * 0.2;
+ ]4 F% `: B8 A w - ti = Date.now();
! L; l7 e7 k. S% z! @. ^! U8 N+ {0 r - if (k > 1.5) {
. r5 N1 p: e- u+ a" q* d/ T - k = 0;
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- setComp(g, 1);/ M2 U( c- s* F. ] I4 ^' X+ @4 e
- da(g); [1 s' j) T) k" p5 Q/ t6 @' F
- let kk = smooth(1, k);//平滑切换透明度
0 @ y- w! }/ A5 v! [ - setComp(g, kk);
1 _& y# F7 r; |% j6 h. m+ Q - db(g);
2 @( S: J' f, G3 ^ - t.upload();
. x! G' a( Z2 j/ @4 W, a - ctx.setDebugInfo("rt" ,Date.now() - ti);
6 f. a! S, A' n# G6 b3 ~. { - ctx.setDebugInfo("k", k);) ~. C: K3 A8 U# ]) n
- ctx.setDebugInfo("sm", kk);
& K; i+ P, n0 l3 P - rt = Date.now() - ti;5 i. N( u$ y9 A2 ?2 O9 O9 Z4 E! ]
- Thread.sleep(ck(rt - 1000 / fps));9 A' Z+ x% x5 w4 ^; _$ k
- ctx.setDebugInfo("error", 0)8 O/ g* {3 h* }9 k! [5 `. s& s
- } catch (e) {
9 z4 D r4 j0 c - ctx.setDebugInfo("error", e);4 c' H+ t6 b$ D* L, r" H& ~
- }" K# L* r% L9 s2 v: J( i" j' s4 \
- }
7 v2 Z f4 u1 s$ Y6 F - print("Thread end:" + id);
8 M& ^: T- c E) y* F - }, p; `, N! C8 Y7 `7 e1 n" M" ^
- let th = new Thread(run, "qiehuan");
. S: X3 t3 o3 n, S' R; G - th.start();4 d8 N8 R& h( m `; x
- }( K* i3 v. d3 Z
- f1 _6 B" ]2 b- l {2 F- function render(ctx, state, entity) {
/ Z% U; x5 L7 p, H. B d/ t - state.f.tick();, e1 G+ _6 B% f
- }
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- function dispose(ctx, state, entity) {) ^9 m& }6 r8 d- q* @/ u
- print("Dispose");" E8 I. _' r/ A- y
- state.running = false;4 p) k1 M# i" }8 h! h0 a8 e9 n
- state.f.close();9 `% @1 G; y2 \; ?2 `
- }
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- function setComp(g, value) {& k" J J) B9 g% K3 R
- g.setComposite(AlphaComposite.SrcOver.derive(value));& }% h. R: h# f7 r
- }
复制代码
1 v7 z$ O+ x) a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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5 S) N3 Z0 J4 C7 S5 m2 z& _) X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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