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6 a' Q& {/ j! ]5 z) N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。$ ?( c/ h: B. C. ^7 T6 Q' N2 \) p6 P
- importPackage (java.lang);
9 S, X; Y7 }1 J) ]8 q: q# M9 _ - importPackage (java.awt);
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! d1 Y( j3 _& Z1 S! G, @: T" t/ E- include(Resources.id("mtrsteamloco:library/code/face.js"));0 t. d2 Y4 F9 k$ w6 i K1 b! ]
, F. h9 i1 {" p5 ?' }- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. C. L7 h" ?4 w
8 e9 {3 t4 Z2 z- G2 N! Q" w, h- function getW(str, font) {/ _+ K- t0 ]* u6 {, |: o5 N) `
- let frc = Resources.getFontRenderContext();
* F% y9 Q8 @5 E3 Y! l - bounds = font.getStringBounds(str, frc);' P3 F* E* F$ [
- return Math.ceil(bounds.getWidth());
: D4 L2 ?, L+ o _1 P0 ` - }
4 C& H, z. F" @/ O9 ^) z# ? - $ E2 Y6 m2 V, Y& T/ @8 T' c
- da = (g) => {//底图绘制
$ }# q( |. {/ x6 f* H! p - g.setColor(Color.BLACK);
( ], a1 G) U3 |# B- ?' i+ A* v% p - g.fillRect(0, 0, 400, 400);3 r2 Q. I T+ _
- }; f3 T. X0 t( o6 d, F
- ( |) d8 J1 `! H6 s, Y) w+ H' E! a
- db = (g) => {//上层绘制
, h6 s7 b4 @/ V - g.setColor(Color.WHITE);
$ S7 n Q6 B# K6 T$ Z- u( c" J2 b! S - g.fillRect(0, 0, 400, 400);
; s) _9 V& P" V( ?. ` - g.setColor(Color.RED);- D) R- I5 Q4 T/ V
- g.setFont(font0);8 w7 g e) T9 E" L
- let str = "晴纱是男娘";7 F) a- b4 i: `9 ]9 u
- let ww = 400;
5 h' \4 p" H1 }0 I! N7 _ - let w = getW(str, font0);
9 {1 `5 i$ j! T) S8 G5 ~1 A - g.drawString(str, ww / 2 - w / 2, 200);# ~8 ?/ G/ |- v9 Z8 X' a( x* e
- }4 s4 F/ M7 R+ \
- 0 n$ |* W! _ {" t0 c. r
- const mat = new Matrices();2 R' _* q6 g& _3 z3 b+ x
- mat.translate(0, 0.5, 0);' M' t9 Z, o+ N* F2 e+ N
- " d3 W: }# R+ g
- function create(ctx, state, entity) {
' t- B' W/ e0 F8 L- } - let info = {9 N- ~7 i8 a0 y! S! a
- ctx: ctx,
- s0 L$ h$ g4 ]. M - isTrain: false,- r1 z; [- t; i" M
- matrices: [mat],+ t) W7 n! y" N- {; v
- texture: [400, 400],
4 {& h; H( Y4 x0 f8 k$ e - model: {2 m" X$ j. {$ e r
- renderType: "light",
) D: C# L/ c8 N8 B. y" G - size: [1, 1],2 Y; ~7 X: D+ }3 S& Z$ K
- uvSize: [1, 1]
+ i0 E+ o9 g, f+ G9 r - }; B1 \. X3 G/ I5 M8 J F) f9 ?0 Z
- }
+ b7 E, `3 T+ \+ b - let f = new Face(info);; r% o) b( Y0 i! P% \3 Z
- state.f = f;+ O5 Q0 J* D. y/ X5 |/ L6 Z* l. s
- 2 A5 Y& r! U7 I
- let t = f.texture;
) `1 [9 v' A& q4 x! M9 o - let g = t.graphics;5 h% ^+ z2 i( Q6 H; G2 v3 s
- state.running = true;0 I8 L( w# |- B& A% R! R$ J: K
- let fps = 24;6 I! j, m# E" R) o
- da(g);//绘制底图
" f2 m; Y& O/ A, D - t.upload();9 R g, C! S A$ }7 s9 B
- let k = 0;
' @. _' S+ _" F+ [( m% f- i) B( }& ` - let ti = Date.now();" {, }2 O* k/ ^: h- V0 W- n0 V# Y! G
- let rt = 0;* Y% y4 }' z3 k. c& Q
- smooth = (k, v) => {// 平滑变化
) _) i0 f% \* O! |3 S6 T - if (v > k) return k;
. H0 @; t* D0 ]/ }- Q# T! @ - if (k < 0) return 0;) H, I$ K7 `4 u) X) J* P5 [
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; `9 ^8 `' S- ~
- }
, q9 I1 x, N4 j O6 V: e - run = () => {// 新线程
, p" t$ X: ^- W9 s$ N( m2 m3 [ - let id = Thread.currentThread().getId();1 t& _+ h5 r3 u! B1 V1 T
- print("Thread start:" + id);
, l n% J) k |$ f, u3 U - while (state.running) {
% F: f& N v ~( [. f4 q( D& A - try {
+ p) b) X' P( m& _ C7 j - k += (Date.now() - ti) / 1000 * 0.2;
! j& V" a- P5 I& l# r - ti = Date.now();: a* ^+ ^& N$ r7 L. E) P2 l ~3 U4 o7 y
- if (k > 1.5) {
* a9 U- N4 Z `, d2 s4 z - k = 0;
( q2 j6 S. V3 i' Q4 y! H. U - }
6 M7 J c% W/ H/ r; g - setComp(g, 1);. a% S+ K0 ^+ P* B$ p% ]1 B3 M5 Z
- da(g);7 W) d4 h1 [% b! S. `5 `: B- c
- let kk = smooth(1, k);//平滑切换透明度
& L3 B }+ A( o4 [9 p - setComp(g, kk);
' N" o( \. b7 B. G" w! Q - db(g);# ~/ ~8 |# S: @" s& ~7 o
- t.upload();4 S" G3 | F$ e
- ctx.setDebugInfo("rt" ,Date.now() - ti);" z, W2 T' b# N) \. c
- ctx.setDebugInfo("k", k);8 @, p! B7 i/ M& r$ ~0 A
- ctx.setDebugInfo("sm", kk);
9 w1 J7 S* o k/ v3 e, h2 K4 i - rt = Date.now() - ti;; S4 F2 _; \. l! t( c
- Thread.sleep(ck(rt - 1000 / fps));5 L6 W. E5 q1 {+ r# P" {) o6 k( N
- ctx.setDebugInfo("error", 0) C/ m u1 x7 r1 h ^: j* n
- } catch (e) {
; t4 G! s4 O { - ctx.setDebugInfo("error", e);" O; T! Q' m9 A: f8 Z7 ?
- }
( i6 m: ]! h$ T3 I4 C- l% U - }' `( k1 ?: K) _" t
- print("Thread end:" + id);; m2 z9 S, W7 k1 P
- }
/ q; H9 x: O' [3 D( Y0 M0 R: n - let th = new Thread(run, "qiehuan");
( S6 @- k5 e) h" y - th.start();. f2 K- G: m. L( b4 q; w* o
- }/ `! L5 S: x5 l7 V! m$ v
+ K; T* ?/ q x' e f8 F4 K- function render(ctx, state, entity) {0 u: L* j8 c( W0 R5 \4 e( k# K* I9 g- j
- state.f.tick();
* E2 t" L. O' F+ U& k' V1 T! u, L - }9 q3 Z( Q7 E( N( I! j: U8 {
- k8 _! r+ h( i. g! Q+ U( ^- function dispose(ctx, state, entity) {+ b1 [+ E& Y3 b5 `! S
- print("Dispose");
, t( d8 |4 X, r/ x - state.running = false;: U; t$ `$ Z9 B2 X/ z4 d
- state.f.close();1 P4 e Y. H0 B$ X7 v# h. T
- }- [* d3 R6 \1 J- t0 t
- 0 Z" I& I! D, U9 x9 b
- function setComp(g, value) {2 V, D# E* [' u T; B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
# a$ G- D! T$ V# l% I - }
复制代码
5 ^( w- ]# j1 @* k, \" r* \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。* E" }1 J/ |( H. Z
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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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