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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。
! D; T: U# M8 [* N1 @: H+ D% ?- importPackage (java.lang);5 J1 Q8 h0 O* [ D
- importPackage (java.awt);4 J) P0 ]9 g) }) @
- , ?9 ~7 B% [! u1 W
- include(Resources.id("mtrsteamloco:library/code/face.js"));
3 ]; U) r$ ~2 d0 W$ ? a) A* y
( m, p& z( V7 P! L, s- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* |5 f& k! _5 e- `; f2 T
- 7 @, s" Z0 n7 X" E0 X/ I" {
- function getW(str, font) {0 A3 b' o! [; P# k& {* w4 S$ S/ N
- let frc = Resources.getFontRenderContext();) u7 G1 ~8 Q7 X5 V, {) o7 b/ o
- bounds = font.getStringBounds(str, frc);
. B" D* X5 F) G7 y - return Math.ceil(bounds.getWidth());
4 t3 r2 z8 f% \2 b. g - }( E6 R5 L2 ?2 E1 F, y( S* U4 M
2 P* ?$ c/ J+ l- z3 V- da = (g) => {//底图绘制5 ^, S7 }% H8 a* ^) N4 X* L# _
- g.setColor(Color.BLACK);( r8 }1 J2 J& i& y
- g.fillRect(0, 0, 400, 400);
5 }8 s2 \7 B8 B# N' _6 X- D; q - }: p9 n' Y3 f- E
- $ ]8 `( ~% b: } h# X
- db = (g) => {//上层绘制
/ c, P, [' X7 U9 X, S) S - g.setColor(Color.WHITE);
* O0 A' V3 Q/ M, Z& T0 Y' b - g.fillRect(0, 0, 400, 400);
, T }+ x6 N7 }8 y; T - g.setColor(Color.RED);0 K2 `) |+ [7 c0 n3 p& V$ p
- g.setFont(font0);+ R/ m+ s) o) A* c. R& V, ]3 u3 h. Q! r
- let str = "晴纱是男娘";& Z* x/ l* n+ Q E0 Y6 W
- let ww = 400;
, M- z( R( M7 U6 _: @3 n - let w = getW(str, font0);9 x; `1 R9 h9 C7 Z2 {6 {$ h
- g.drawString(str, ww / 2 - w / 2, 200);) {9 _+ _8 T: m9 E! |) ~
- }
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- const mat = new Matrices();1 F3 B9 x% a& I6 ]! x
- mat.translate(0, 0.5, 0);2 M; z; R* W$ t/ B# o5 F! t) P
, n, C$ n$ q9 h# U0 A T9 b- function create(ctx, state, entity) {& k7 u$ w; h) d- c& |5 q
- let info = {# `+ W4 B5 }2 _# M( n8 I
- ctx: ctx,
0 e; f" b8 E; B - isTrain: false,
: `5 S( Y+ ]/ w3 [! D( s - matrices: [mat],. V$ P1 r+ n5 {% Q& C
- texture: [400, 400],
1 E4 C, v1 v0 h2 ]7 J - model: {" F: c0 c* [+ x6 u4 L L
- renderType: "light",( }- r' g" Q" X
- size: [1, 1],
1 X; k& C9 G2 ]& H. y( Z - uvSize: [1, 1]
$ W* a0 h) ]2 M+ Q7 s+ _* F/ L - }% W1 k* h0 e- i
- }" Z& t+ H& C+ I3 C( Q; `, q
- let f = new Face(info);) \: I4 Z, e5 I G
- state.f = f;) w; C# i ^7 i( N/ C+ a
- , r+ h& q; x9 j, x$ h' ^
- let t = f.texture;) _/ ~/ M5 T. B9 C% ?1 T i
- let g = t.graphics;5 T. l- I5 E$ w0 a c4 O& r( M
- state.running = true;
( f# E( L: `9 |0 }) v - let fps = 24;
% F9 U( c; D; q - da(g);//绘制底图
7 ]3 y, K$ X3 t2 j - t.upload();
# A. G2 l1 e/ Q! g. b - let k = 0;, a0 Z' l1 Q+ B6 v% j
- let ti = Date.now();
7 L; W5 ?) ~% c - let rt = 0;1 y" } S% o# F* ]8 J" c
- smooth = (k, v) => {// 平滑变化
3 D" p3 F1 P( Z; r - if (v > k) return k;7 K/ E& u3 C N* |9 g
- if (k < 0) return 0;1 M" W+ v; q! p$ m" n, R1 |
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% L* k$ y+ F1 G! A* o9 t3 v& P9 _ - }) e X) ~( c2 n
- run = () => {// 新线程
% E9 p% Q f! G! | d - let id = Thread.currentThread().getId();7 p1 p3 e9 l7 S$ j! S
- print("Thread start:" + id);( H" o: j, k* I- Q3 T# @6 i# ], E
- while (state.running) {" P+ I' T2 q# y) H. E
- try {8 F% ?' J& ] d
- k += (Date.now() - ti) / 1000 * 0.2;. u k* B" c6 k9 v. q- f& I
- ti = Date.now();
) t; I7 q' H) _ - if (k > 1.5) {
- p& E4 }3 C2 z, P9 ~# S - k = 0;2 K1 L) `0 J, E( n; o
- }) O9 X! K! H9 ~6 T/ |
- setComp(g, 1);
$ G2 H+ ?6 W5 ]+ J: e, s - da(g);3 i6 I' _0 }$ v; r: z
- let kk = smooth(1, k);//平滑切换透明度
; T7 d$ A) C' h& B& \ - setComp(g, kk);- h+ Z4 R' w6 G3 V3 `3 T+ Q
- db(g);7 Z' a$ q1 B9 X: |/ u/ O+ J* p8 h
- t.upload();
; S. H) f5 H' d% C9 U% w7 ^ - ctx.setDebugInfo("rt" ,Date.now() - ti);
( F0 Z, K( E1 K; ]' O# ?1 q' A - ctx.setDebugInfo("k", k);4 m z [4 |! k3 N- F
- ctx.setDebugInfo("sm", kk);
! v( u, }( e- j3 X7 ]$ `+ s) _, P! c - rt = Date.now() - ti;+ u: |/ J; m0 `$ o5 M w
- Thread.sleep(ck(rt - 1000 / fps));
4 R8 c$ y/ K9 E' r7 J6 U - ctx.setDebugInfo("error", 0)6 j: n3 G' i& I
- } catch (e) {
6 W) j+ B, ?7 H' l$ { - ctx.setDebugInfo("error", e);9 t4 H/ l' x, b
- }
# }( a8 ]$ F" x* e: e+ g# X - }0 q4 ^1 x: h. a' U5 J
- print("Thread end:" + id);
m% s; P+ o+ P8 l4 n - }
! s- |: U7 o1 n0 { - let th = new Thread(run, "qiehuan");
. }; @9 j5 P; l9 }! { - th.start();% q$ H/ f6 ?% ^5 T' b; N9 Q
- }4 Q `) w, R) P( V
* R. d0 }2 Y6 M, p3 \& Z- function render(ctx, state, entity) {
0 X( t+ ]; x1 Y6 a! A/ O+ ]7 p - state.f.tick();' H3 _8 h: O$ x1 Y5 ?% ]
- }
: p) q3 ]( R7 D8 d6 Q) f x
, J* i% S' n8 z0 D9 M4 n! c- function dispose(ctx, state, entity) {7 R" Q9 L( I+ T) o) W
- print("Dispose");! `8 `) t$ e; x, o' [
- state.running = false; C: c d: _- P+ @1 T
- state.f.close();
" F6 x* q0 P5 G) ? - }6 C C- l& ^5 p' z, S
- : w+ K7 K1 u% Y; N! U+ g
- function setComp(g, value) {# j( Q' i: Q8 X2 z$ p/ y
- g.setComposite(AlphaComposite.SrcOver.derive(value));& @4 S( G% M, q& s1 i
- }
复制代码
: L$ y$ h& y; 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。; F6 L* F' k" H0 o( _$ u2 x) T4 ~
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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), R3 f, g& y# g7 u3 I: z8 ^# y
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