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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。. C* P4 k7 j) E8 G7 B' h ~
- importPackage (java.lang);- l5 q Q* v; g5 y
- importPackage (java.awt);% j8 U" b" |9 @$ ]" M. X& |9 B* O
" I( t) w# P7 B6 N- include(Resources.id("mtrsteamloco:library/code/face.js"));* R& j5 G7 ^3 O- t6 t
" @" }5 p! j% E* N, y% \0 x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 f C- v3 `% ?2 F' A" c' K+ T! k
9 o) p- V7 ?" B ^. ?6 ~- function getW(str, font) {
3 K: J6 |+ W( m% w8 d v M - let frc = Resources.getFontRenderContext();
/ o* a$ v0 b$ d( p: Y - bounds = font.getStringBounds(str, frc);
5 e" a0 r2 V$ r3 I0 N - return Math.ceil(bounds.getWidth());2 b+ \- A$ g4 b1 }1 X1 b
- }2 E! ?0 k7 Q% D! \3 C
- * o, O7 a/ M! \$ `5 j z
- da = (g) => {//底图绘制) h2 Y0 y/ p# C/ k5 g' v8 D
- g.setColor(Color.BLACK);
9 x& d+ g# p B( u. H r - g.fillRect(0, 0, 400, 400);* V9 C7 p3 j" {6 j2 V- ^- j f; ^
- }$ B- e0 p, r/ y3 i
) r3 e& o4 D$ V" f$ s( w- db = (g) => {//上层绘制- A2 d# B) ]9 | y' a
- g.setColor(Color.WHITE);
2 ?' o; T# F9 {* f - g.fillRect(0, 0, 400, 400);. q" V" X) D* H# _/ L% L- A
- g.setColor(Color.RED);5 ]5 @# L$ q% N4 d. R6 v4 p
- g.setFont(font0);; [! X3 u% u6 b v+ D# f
- let str = "晴纱是男娘";0 W% [ W, I3 D+ T* c
- let ww = 400;
- s) e4 H1 M4 {2 D* W) ^1 }2 I. p - let w = getW(str, font0);
/ t9 J: n5 G" o% R- H; y& } - g.drawString(str, ww / 2 - w / 2, 200);- G' |( K! c& Y4 z) \
- }* D4 L4 `8 S2 T) x
- # s2 A9 h8 G1 G* I
- const mat = new Matrices();
1 s; O8 N) o. W6 ^3 ]( R1 b! k8 e7 | - mat.translate(0, 0.5, 0);! e! l2 Z9 F/ U4 U! q1 j+ `3 y
( K; `1 O, s) @( q- function create(ctx, state, entity) {
% _, ?' |' K6 V+ I* X/ s2 ? - let info = {
C8 S) a& r+ Z) z9 m- F( e - ctx: ctx,- C ~) Y( e9 i7 l
- isTrain: false,
- Z @+ i" w9 K! i8 Y6 Y/ A$ w - matrices: [mat]," i+ K& i' O0 ]: H# N" n( d
- texture: [400, 400],
. L" w, R. e% B - model: {- o, H$ p* t6 q. ` P2 [8 O2 {
- renderType: "light",
1 e" J2 K: H a3 L" u; W - size: [1, 1],- g) j5 I0 D. g! `8 b! `9 @
- uvSize: [1, 1]3 J/ s$ d7 S' `& d* N
- }
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- let f = new Face(info);
. e$ F F+ W* x. o, g - state.f = f;
' U7 f4 S+ K6 @5 I' G$ h' G
% W8 A' X6 X0 a6 d- let t = f.texture;8 Y0 y' d0 X& ~5 i
- let g = t.graphics;
: o9 e8 ~: U3 H6 N3 }1 }( W: X - state.running = true;0 ~; W1 I' }; @" Z
- let fps = 24;
/ y( t$ n2 }$ u) \9 ]! r - da(g);//绘制底图
; u& n+ w6 m# p- ]& m5 |0 F - t.upload();. ^$ g2 J" g7 |# i0 B9 m
- let k = 0;
- d) A) D( i& Q: d/ B. w+ s+ B - let ti = Date.now();
7 z; I! U( G7 B- G: p* b - let rt = 0;
: H5 O& I: }, |: U7 ] - smooth = (k, v) => {// 平滑变化
2 I% h, h1 V6 G2 [8 t$ b - if (v > k) return k;- z" e; t& z2 c& v8 z6 q. Y
- if (k < 0) return 0;# s2 P4 w2 W3 Q# p5 L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 G! u5 e/ C/ I+ T' x
- }
?$ p: m- f3 M. C! y - run = () => {// 新线程4 H9 r/ p5 u |8 m7 S1 X
- let id = Thread.currentThread().getId();7 {, W$ p1 b0 d- c0 X* a
- print("Thread start:" + id); G* z2 _9 x7 r' I; p' A
- while (state.running) {/ E z$ W. }! W& y+ b
- try {" r' F' t; x6 }* X6 a3 I
- k += (Date.now() - ti) / 1000 * 0.2;
/ x8 A& G O3 Y - ti = Date.now(); Q6 `; G0 J7 l+ n5 j6 C
- if (k > 1.5) {
5 X6 X. T; u2 K/ C( V - k = 0;/ U* ]9 H9 E& e x( T$ p( y+ R, z* B
- }
; H2 ~- @* `6 d$ [! } - setComp(g, 1);
% T+ H; t# A( |, ^4 \ - da(g);
5 C" j8 e) s0 D - let kk = smooth(1, k);//平滑切换透明度
6 b% x9 a5 e; T O8 D - setComp(g, kk);
" w% }7 e0 g2 v - db(g);
/ S5 f# ?+ \4 n U, Y5 J7 J - t.upload();
" J& t5 d. C; |7 C - ctx.setDebugInfo("rt" ,Date.now() - ti);4 D7 ~/ ^) f' O
- ctx.setDebugInfo("k", k);
0 V, U3 I4 s3 c! K - ctx.setDebugInfo("sm", kk);
; I8 j3 o" L/ H2 l* s( o - rt = Date.now() - ti;1 [' T7 ?% b4 r w/ P
- Thread.sleep(ck(rt - 1000 / fps));- U) P0 ]' d2 Q6 ]
- ctx.setDebugInfo("error", 0)5 X! l+ n) w s" [/ o; d7 O1 s( ]( V
- } catch (e) {
7 d' _1 c1 ], S8 a3 w) A# R - ctx.setDebugInfo("error", e);
* _; m2 Z0 r" b - }
9 C& r: g6 e3 Y; [' n - }2 _5 D' Q- H4 a2 _) [
- print("Thread end:" + id);
3 ^# I; o) ? n; N, x# v/ ~ - }
, D1 m0 Y- p. _, u& J {/ f5 ~ - let th = new Thread(run, "qiehuan");% S& ]$ `6 [; @( ]
- th.start();
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6 H s) U( s+ N; s2 h* n# j% k- function render(ctx, state, entity) {2 o) g) S! i' Z. ]+ X# g. E
- state.f.tick();
; e; I# F% Q3 A) j l- S$ H8 r. U - }
: F$ s; h [" q, P5 j0 V - * v( q# g c" V; G; ~
- function dispose(ctx, state, entity) {
7 c% G2 {$ b6 m' ^3 [ - print("Dispose");- v' D4 {6 f L; L
- state.running = false;
! q. T( e0 G8 @4 i7 X) } - state.f.close();- q6 c; f j/ [( D/ k9 J) V
- }
- b; c6 s) l. \+ b# j - . c3 ^9 l6 T% a1 r
- function setComp(g, value) {# u0 {7 T; @# U4 {0 M
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: j5 ]9 O/ A y# r- Z, k - }
复制代码 % z i# D3 i: I% z. j. n" G& w
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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