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# _: @5 h) U. n v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。9 m t. p! x& W' j/ A$ D
- importPackage (java.lang);0 e/ g! ~7 g0 S$ E u: d2 ~ b
- importPackage (java.awt);5 h$ }9 ?. f: Y1 X" m6 G" J& E: p
0 ]& z% l* Z/ p* L1 y1 c7 L4 u8 g- include(Resources.id("mtrsteamloco:library/code/face.js"));
* z0 L( E+ x+ `- U" z+ G0 r - ) f8 L3 T R5 C" }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 |: p0 J1 ^1 x6 V |& O, }9 Z
A+ `4 P1 n& \8 L3 L- function getW(str, font) {- ?* a- b2 N. o6 K' U& J
- let frc = Resources.getFontRenderContext();' ?& \, R8 O }. ?7 `( k
- bounds = font.getStringBounds(str, frc);& y$ V' `9 H3 J7 y7 n
- return Math.ceil(bounds.getWidth());
- B, H( f" K' c' h - }
* w0 |' Z4 F3 J6 w( F4 o - * E% o$ ~: B# u
- da = (g) => {//底图绘制
; X! S/ p- f& L7 f- E* _2 s, q - g.setColor(Color.BLACK);# H. d3 c5 g# c( J. {
- g.fillRect(0, 0, 400, 400);
+ O8 Z! s$ c' G o - }( ]) \3 b# t4 m
3 a! p# F7 E. D) y4 q4 |- db = (g) => {//上层绘制" {! ^5 v8 p8 X
- g.setColor(Color.WHITE);- A0 Z* X c" A( Z
- g.fillRect(0, 0, 400, 400);0 K: S/ M6 t. B' |- s( S5 J
- g.setColor(Color.RED);
* {1 Z8 V& _) B7 b& A - g.setFont(font0);
% `( d0 [9 Z+ `0 W" @* }! b- |+ n - let str = "晴纱是男娘";; S- m/ |% i d2 M1 N9 r O/ R d( z
- let ww = 400;
0 N/ v; D/ e% O' n7 k' N2 w& T. O - let w = getW(str, font0);* l- {) d, J0 D5 `. r) j3 Q
- g.drawString(str, ww / 2 - w / 2, 200);
- m2 z2 {7 i3 X' @- G, }0 K - }- x5 F! n5 _, C+ J
7 C+ r8 Z% X) o0 F/ G' l- const mat = new Matrices();: |' |5 j) ^8 I# @1 c
- mat.translate(0, 0.5, 0);
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* E" F( y, c, I- function create(ctx, state, entity) {5 [; Q v- p7 X. F0 j9 u
- let info = {1 {" V% c. G7 W
- ctx: ctx,
5 l" d7 D! F" t; x2 p) G6 g - isTrain: false,
2 T/ J2 F1 d+ ^; \% p - matrices: [mat],
$ F0 u6 V1 g o+ F: J" k3 p - texture: [400, 400],
0 R6 _ L1 X8 i6 P4 p7 R' Z% y - model: {
$ ~5 P3 A+ O" {0 Q8 ^! K - renderType: "light",2 W0 k+ a$ J% E8 w7 x/ Y+ \0 d- N# q
- size: [1, 1],% [$ U5 G, X4 V
- uvSize: [1, 1], ]+ ^. S% e8 X6 I7 w4 e
- }
8 N$ i- U" }" i8 d" Q - } {2 S, q5 U3 i, g% I" P
- let f = new Face(info);
* s, h S9 o0 p R2 [ - state.f = f;
4 Q! r( M% H( h* }" u
' ~5 ^2 N, G# [! @: Y- a- let t = f.texture;
- @5 a0 l+ g# e+ k - let g = t.graphics;
$ r8 G' e& F0 i8 Q( y, I9 r: u" ] - state.running = true;; Y/ ~# O& L% v; p( ]# l
- let fps = 24;9 h5 G1 H3 l9 H# g& C' \$ C+ N
- da(g);//绘制底图1 ^9 ]0 k4 U, w" v
- t.upload();& z, _4 ~7 T8 l% \ K
- let k = 0;+ t0 h( _/ T3 \
- let ti = Date.now();4 k2 [$ ]5 K/ y) x4 R2 f
- let rt = 0;" A; j$ _% _0 j4 W( U' r
- smooth = (k, v) => {// 平滑变化- q9 |& Z/ \! A( A
- if (v > k) return k;
" ~# ?( J( a# w! H1 U1 Y - if (k < 0) return 0;6 w% [. g6 n/ q: K* s& l1 [" x
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
) x! |+ p" C/ v( W9 }" n! T - }
% r9 j) _: i6 W1 {" \/ l - run = () => {// 新线程1 r6 R$ L/ {+ u4 l' r
- let id = Thread.currentThread().getId();
p$ H5 e) G+ X* O6 ]1 [ - print("Thread start:" + id);
0 i0 }4 l) m' {1 C+ f: a# K1 Q - while (state.running) {5 m J: A. g3 i' i. |9 s4 \
- try {
! h# e5 G D0 g, v } - k += (Date.now() - ti) / 1000 * 0.2;- j8 a" s% p9 k6 p3 j6 n4 n
- ti = Date.now();
/ U, _. ?; s% `; m - if (k > 1.5) {0 F! w8 }+ h8 a/ L/ E% T4 f; ^
- k = 0;9 j0 r* j: h; ]4 E& |
- }
; {! s( ~; N* X8 J9 F' @2 l+ z: S' ?4 N - setComp(g, 1);$ |2 w( ]9 n) h0 z* c: M% {
- da(g);2 Z, @% K( Q! ~
- let kk = smooth(1, k);//平滑切换透明度
9 I4 ?2 \( }; _& q3 D9 Y - setComp(g, kk);
1 L x9 P2 X- s% ?, d y) n0 F( z$ v - db(g);$ u% q' E; z! G/ s6 B
- t.upload();
: Q- s' d: @7 j - ctx.setDebugInfo("rt" ,Date.now() - ti);7 j, W% S- T! w
- ctx.setDebugInfo("k", k);
5 M' X. q# [4 Z+ | - ctx.setDebugInfo("sm", kk);+ _1 u: y/ w- I% A! K
- rt = Date.now() - ti;
+ {' S& V. ?) n - Thread.sleep(ck(rt - 1000 / fps));8 C" Q1 e8 o& o8 n
- ctx.setDebugInfo("error", 0)
: |" x' |3 G) V* R# d - } catch (e) {
, r: Z/ l- S/ A4 W& V1 | - ctx.setDebugInfo("error", e);
$ o- `, N+ o: T+ s- y! b2 Z: @# @; F - }3 I3 w+ S2 b% s0 ]& F
- }
- I4 f# g, c" g9 f# r8 w3 t3 h - print("Thread end:" + id); x8 w# |8 ?0 X' O3 ]+ i2 ?) j
- }, Q9 _$ D2 o+ u; j
- let th = new Thread(run, "qiehuan");3 u1 |& ~4 h2 _3 Z' ?( i n7 r
- th.start();
) x6 ]5 H$ M; [6 \' m - }
# i+ t: d0 J6 y
# }4 D. \# {) ? m. e- function render(ctx, state, entity) {
1 v( B2 x" B9 {3 b2 Q( m3 N! d - state.f.tick();0 f- A! F& _* ~0 C
- }& Y3 m- `& q( o
- 5 x+ |' j" n4 ?
- function dispose(ctx, state, entity) {
* ~! c9 u2 M" i. J - print("Dispose");5 n3 c- {1 W8 z! z! i w- A3 w8 l
- state.running = false;
R' s; F, j# M1 F' c" Z - state.f.close();
6 d. X9 e) W! J( p - }7 Q# r! Z& F- G/ b. o! {
2 n- s) ]6 {; m( y* p5 ?7 u0 O- function setComp(g, value) {! y3 [4 _( S6 @2 O$ j
- g.setComposite(AlphaComposite.SrcOver.derive(value));
& u6 Q6 D( W& y' l - }
复制代码
6 B1 W" u0 @$ p; g; q5 }7 \! S9 L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。
+ Z9 B- Z4 z0 \5 O H. h, L3 `$ O, o! J0 x. P
* M) ^' n# v5 R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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