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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。
$ Z" I2 Z8 E1 L/ z- importPackage (java.lang);$ _7 |& ~# r4 H- [/ J1 k
- importPackage (java.awt);2 g8 L' S" @! Z( \/ e0 X- C
. u; l, p1 G P4 \% H5 X- include(Resources.id("mtrsteamloco:library/code/face.js"));) X& Q% G- o& c; c0 L9 T3 N& ^2 W
- * u( j; N3 M8 W% L( p
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 k' W, b/ @% q" j1 t
8 S) Q) d1 q W& N- function getW(str, font) {9 \+ E+ v) r: z4 l; {9 F, z3 w
- let frc = Resources.getFontRenderContext();
/ j- y+ x) f7 N: Q- I# j1 W - bounds = font.getStringBounds(str, frc);0 F+ u1 P+ M! G) T
- return Math.ceil(bounds.getWidth());
2 T# s0 d1 m' m# w - }
; A7 _! n% F1 {% H# p+ G
9 b/ J0 w* _3 ?& l' y7 V& q- da = (g) => {//底图绘制
) n" O7 W) t* ^* o5 a) N - g.setColor(Color.BLACK);$ s, Y' ^( M0 P* y6 k0 n2 V0 i3 k5 T
- g.fillRect(0, 0, 400, 400);3 @0 ?% C8 {) k4 d7 L g1 ?
- }3 L3 F. S) e& Z' ]2 `& Y
" @2 Q3 M8 p% g( v' d" [) K' g- db = (g) => {//上层绘制0 z4 t" V+ g: r# }
- g.setColor(Color.WHITE);
7 ~, t* E' Q0 A! U' G: g# j - g.fillRect(0, 0, 400, 400);( g# {8 k: T8 L
- g.setColor(Color.RED);
% {. j# X+ h. r( q: G - g.setFont(font0);
4 O+ J5 X1 s4 R - let str = "晴纱是男娘";) s) G4 q. @% ~; d3 S
- let ww = 400;
, l6 ?+ _% {- l+ i' I - let w = getW(str, font0);3 C; E0 l3 {& f( S* V1 a
- g.drawString(str, ww / 2 - w / 2, 200);7 L0 x$ Z3 d5 A" l
- }
- h) ^; X' J. a& c6 e
! C6 I/ ?5 k I- q9 x- const mat = new Matrices();
! I7 c; I7 Y& T( W - mat.translate(0, 0.5, 0);% p5 H X& G) H# ^
& d7 D4 Z3 O# B/ P- function create(ctx, state, entity) {. S7 Q, l+ t% R. G
- let info = {
1 W3 K$ N. w; o - ctx: ctx,% ?& g+ m8 D+ {' \; K
- isTrain: false,
9 O# I6 t3 j- `2 E# f - matrices: [mat],+ k" J! S9 Z; |4 q; {4 f- z
- texture: [400, 400],
# {6 ~2 y K' e$ q |: g [ - model: {
) M/ z) W+ C( U7 K; t$ c - renderType: "light",
% N" V: ~2 m8 V/ k4 N. M: x0 @ - size: [1, 1]," F! \3 \; V0 C7 x1 `
- uvSize: [1, 1]
- t2 B" |0 W( g9 P8 \5 s: \& O - }
) V- c3 q0 @/ J& W/ i: e: h" v - }3 r& M1 g \1 W9 D
- let f = new Face(info);
9 K+ f& u3 _ { - state.f = f;# H8 E: [/ Q& y
- 5 T) I3 |7 @5 V$ T5 \" o
- let t = f.texture;
8 U+ b: A) H2 [# A9 k o - let g = t.graphics;
% v3 r! ?) O- @, M) ]: U - state.running = true;/ }4 q1 o/ P' u# `+ a; O( x
- let fps = 24;
: [; D- T0 w, W2 |8 e# p/ H - da(g);//绘制底图
. u7 ^* d! @7 | - t.upload();* p x, d7 k5 @2 ^( ]' E
- let k = 0;
6 t" l8 \& b# H - let ti = Date.now();! ~, r9 c: S6 x( e1 [# n
- let rt = 0;1 c/ v: H) R+ u
- smooth = (k, v) => {// 平滑变化
; i9 M' E. C2 s& V1 I% \ Y - if (v > k) return k;; P5 [. {4 x$ {8 T E1 v% p
- if (k < 0) return 0;
5 g$ D l3 S( J8 p- a% |; N$ Z; M - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( N1 f6 N" [( q# E) N
- }
9 H0 _2 t B/ x5 d5 E2 B - run = () => {// 新线程( B, [! o! M0 c7 x( i- ]
- let id = Thread.currentThread().getId(); A i% U# j! I8 X$ E
- print("Thread start:" + id);2 M4 H# \* @: u5 B5 ?8 q* ^% D
- while (state.running) {
8 `& w1 k/ { E( o! g, u. { - try {
) a F- }- s& } - k += (Date.now() - ti) / 1000 * 0.2;
; b. N2 e$ H+ d. Q - ti = Date.now();4 l1 ^1 Q/ W. l6 R0 M
- if (k > 1.5) {5 D3 d4 d3 t% J x% F
- k = 0;
/ G W% V( Z" [4 T - }
$ n- q5 s: L8 M$ Q# \$ l - setComp(g, 1);
6 F( ^+ g v: D j7 X - da(g);
+ u' D0 ^2 u: O - let kk = smooth(1, k);//平滑切换透明度
' B6 m$ {' K" W# a9 k: R - setComp(g, kk);; X, K* Y' @" N. w, j, Q; [
- db(g);7 [# s0 c2 l: F* C$ [( l. T
- t.upload();
1 N ?' ?% Z5 e - ctx.setDebugInfo("rt" ,Date.now() - ti);
/ X4 q6 o; P1 l- I! i" h - ctx.setDebugInfo("k", k);8 t: a$ _ |! f
- ctx.setDebugInfo("sm", kk);# x2 }( u" l& x5 i8 _# w6 L
- rt = Date.now() - ti;
6 D r/ Y8 U9 t/ @0 {1 b2 l - Thread.sleep(ck(rt - 1000 / fps));0 x$ M) H( o! ]4 s- |+ i
- ctx.setDebugInfo("error", 0)
k2 w! _3 y' S- H - } catch (e) {" c, N: H& n) Y, O
- ctx.setDebugInfo("error", e);
' a, W4 s* `' _% L7 [% z - }
/ p9 v5 j# M% [! ~, w) \ - }( }, H+ f# f" E. r C9 e: G
- print("Thread end:" + id);" T, q, F* Y. U
- }+ Q1 o; j* t+ q- _) Q1 ?) i, H
- let th = new Thread(run, "qiehuan");
/ i$ y E1 {8 T' ~; i3 i* C) @ - th.start();
! |+ U4 v2 c0 f }- O. r" T4 [ - }
1 C3 Y; K0 W% S3 b7 G8 v - % f7 x+ {8 e( A7 ? c
- function render(ctx, state, entity) {
, d5 G2 r4 u5 X7 j - state.f.tick();
: C! J: v% N1 |: K - }/ T+ B/ b0 U, t; l
& d" A; B# r6 u' {: H- function dispose(ctx, state, entity) {
+ g( E2 @& _( s# N6 U, e$ H2 ` - print("Dispose");- D8 |8 C8 o% L' s" Z9 U9 [: Z; p
- state.running = false;
3 O3 ` l- w5 @" ` - state.f.close();% B. s+ e* u$ ^5 I2 B" f7 Z
- }
+ F* \7 |# v _/ z - 5 ~9 h$ G% h4 o) R& p
- function setComp(g, value) {# ?$ m4 o& v8 p. V: @
- g.setComposite(AlphaComposite.SrcOver.derive(value));% E/ T1 o& r' g
- }
复制代码
I8 Y: t/ D/ J, e0 h7 w9 ^$ E) D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。9 k: H, L2 G! H
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# }. E- D! u1 t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! p0 D( }7 x6 j2 j+ r7 s5 s( G. w i
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