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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。 g6 L2 `) f: x3 S
- importPackage (java.lang);
( I" {; d( F* d' @+ w. o - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));# f/ E# V; ?) P
- 2 E: @, n3 o9 a/ L5 w* Y- N( @) X) [. Q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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# I3 @" d/ V3 f0 U8 S$ r, U- function getW(str, font) {. t% y; `; c1 o9 h6 D
- let frc = Resources.getFontRenderContext();; y. d- \6 j% b, F% L
- bounds = font.getStringBounds(str, frc);
$ M/ @+ L5 G# f# ]( f7 O6 H - return Math.ceil(bounds.getWidth());
9 u1 l- _3 i: ` - }
7 |1 {/ c6 ^3 D" r% J& l, p8 | - ! x4 D' F- J1 T9 k, _
- da = (g) => {//底图绘制
! R" H2 N0 @. {: V; F9 N+ o& E3 K - g.setColor(Color.BLACK);5 a% C) N, q) x+ b6 j, `
- g.fillRect(0, 0, 400, 400);2 A9 |. S5 O, ~9 m4 X
- }
, M% Z0 V8 C/ `, G! t0 @- |6 w# m7 T
3 f7 {* p+ w2 Z- e b- db = (g) => {//上层绘制: Z" X0 y+ F$ \. K7 J, m8 v
- g.setColor(Color.WHITE);
9 B5 Y( u; ?" D0 w! o - g.fillRect(0, 0, 400, 400);
8 w2 x+ ^, l" i" _, x) K - g.setColor(Color.RED);0 S% p! t+ i) r) i- s
- g.setFont(font0); Q) B! o2 Z- j6 C$ V3 o |0 @$ f
- let str = "晴纱是男娘";2 S7 [3 M2 v) |7 N- a+ I
- let ww = 400;
* X! U Z; t* T( c4 f - let w = getW(str, font0);7 s- U+ _5 u% _1 ^1 b7 E* |
- g.drawString(str, ww / 2 - w / 2, 200);
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$ \% k2 d9 m6 R- const mat = new Matrices();
/ T- u, q( s) v2 v8 t - mat.translate(0, 0.5, 0);0 |) C4 S3 A- |( t9 c3 Y2 ^5 N
+ i: `4 S. u: `% M+ C3 Y- function create(ctx, state, entity) {) ^9 {9 c) \% X. h
- let info = {
" x" M" a8 Y* S* T; R" M - ctx: ctx,
" N% r, |2 I. u9 N9 M - isTrain: false,
5 J# j- g, S6 s. P( q1 E. g - matrices: [mat],
; _0 w" |1 D9 c' P. i5 E - texture: [400, 400],/ U" C( N! \- w7 N8 ~
- model: {
4 W0 s# C; [. o/ M$ h - renderType: "light",0 x, v1 G/ E7 P- Y- [7 m
- size: [1, 1],
) Y3 ^5 F% m/ ^; x - uvSize: [1, 1]
$ f9 ~9 ^, K* B - }
2 v0 {2 I; \# n+ d* `. C( C - }
$ {; A5 h. ~/ m3 v - let f = new Face(info);, w5 G# X2 C6 z
- state.f = f;
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% \, Z' c1 }8 @$ v' a1 }2 {6 d* f- let t = f.texture;
+ X; r9 ?* @& U/ N' c - let g = t.graphics;
! @, y7 V; ?/ v0 R6 o - state.running = true;7 m) y7 h& P1 }! u7 z- {
- let fps = 24;# G7 T+ ?( c3 B
- da(g);//绘制底图# y/ ~. H! X1 f1 i- L/ a
- t.upload();
' A3 T- g2 G! c0 E5 O) x - let k = 0;0 y; R8 W: ^+ s4 B" v' h* n# o5 _
- let ti = Date.now();/ V# H4 }- g# r0 M6 I9 d5 {0 U& w# ~2 i1 [! h
- let rt = 0;
7 m T) j7 P+ j- W5 @ - smooth = (k, v) => {// 平滑变化# b0 q N1 C5 s: g9 }6 a
- if (v > k) return k; c9 t0 P7 L1 |5 h! [$ y& h
- if (k < 0) return 0;* P& i3 P. s. P) x3 O
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' q0 U' H. |2 Y# s7 d
- }
$ M$ z" B4 u9 h - run = () => {// 新线程
}6 i/ G( f" q1 D - let id = Thread.currentThread().getId();
3 N7 v6 c. t- ?9 N: W" U9 u( o Q - print("Thread start:" + id);9 U( V2 L& X: o# P/ g5 c2 U
- while (state.running) {
6 ]# `: k& i c& {: T) F9 W3 d: W - try {7 c8 u' g; i- ~6 E' R: N" l
- k += (Date.now() - ti) / 1000 * 0.2; ~5 j3 `# F0 k: V+ I* `5 F
- ti = Date.now();
) G- u* s* V: u - if (k > 1.5) {% g4 l0 U# A8 u+ _
- k = 0;' N4 g6 ?6 _2 A+ u
- }2 S) ~2 `6 F+ k' j4 C# C( ?
- setComp(g, 1);( k5 O3 W( L# e) D2 p* A% t
- da(g);
1 B% B2 B9 r6 N. a5 P0 `7 Z - let kk = smooth(1, k);//平滑切换透明度
, S- @4 P) J/ U8 ]# G6 U+ @ - setComp(g, kk);
+ J& N# A- H$ ]+ `7 O - db(g);; S6 ]0 @5 h( q @1 a; o
- t.upload();2 s$ G" H! v: h" {
- ctx.setDebugInfo("rt" ,Date.now() - ti);3 m$ F* u0 x8 I# Q& W6 d
- ctx.setDebugInfo("k", k);$ P+ {) I1 G' N0 t
- ctx.setDebugInfo("sm", kk);
: Y0 O- @3 [' y! I4 P- b0 x( o5 } - rt = Date.now() - ti;; Z9 {' ]0 b0 C4 Q, m8 B1 O
- Thread.sleep(ck(rt - 1000 / fps));
: a, m2 _( ?. X& ~: t - ctx.setDebugInfo("error", 0)6 [/ }4 g$ n: q# G/ ^% S
- } catch (e) {
7 ]8 d- B( v& Y) F* y - ctx.setDebugInfo("error", e);' x# u- }5 Z, |. P- p
- }
+ c5 `( U2 h/ Z) h - }
3 l e2 `: T9 H. k( n - print("Thread end:" + id);
3 t6 O3 [2 e2 {' @* O% ?7 f - }: S5 S/ U% t5 e: X8 R' _3 B @
- let th = new Thread(run, "qiehuan");
3 o: K* ?' m8 k9 B" _$ k - th.start();; d# \! h' L+ r+ k6 m1 U0 m5 t" `) B
- }0 L1 }$ C, e8 Y1 X0 a
9 ]# w, }( h E7 Y1 n' e% z- function render(ctx, state, entity) {+ [2 x( M8 n& [2 c8 A& v4 T9 K
- state.f.tick();
! H' v$ H& I; M9 h( R - }
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- function dispose(ctx, state, entity) {3 _$ g2 k8 I2 N, W. q: _
- print("Dispose");) B; r7 u' T; R$ p
- state.running = false;% D/ d) A5 I1 I
- state.f.close();# s) R% ]; \8 U, E
- }; A3 `( Y7 \ y# l( M- M. ?! p
- ! E5 v" e+ ]6 ]9 B4 [
- function setComp(g, value) {
1 r: Y2 k" c* d7 e - g.setComposite(AlphaComposite.SrcOver.derive(value));
; H! E5 R/ p) @2 ]: g% s - }
复制代码
! Y; W5 m# C% N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。* C% G2 P/ o, ~! 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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