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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。4 Q. e; z/ I+ U/ F
- importPackage (java.lang);2 y" B! P+ V# P2 A2 {/ ?/ E
- importPackage (java.awt);2 @( |8 m6 p2 p0 ^, r5 O$ y* q- T! m
- " o5 b$ g( ^ {, c* M& Z
- include(Resources.id("mtrsteamloco:library/code/face.js"));! W* S0 I& B' q! E9 u
- # X1 r* d( R8 p0 m7 s4 E+ i; _
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
" N. x% X- m5 U5 s& h+ }0 k
* Y6 g; o0 z$ J2 @- function getW(str, font) {
6 p6 @: | _& O9 t - let frc = Resources.getFontRenderContext();
' ^2 d: k/ H" p' \ H+ u% W - bounds = font.getStringBounds(str, frc);8 x! r4 j0 ~3 d- `! C- i8 }
- return Math.ceil(bounds.getWidth());
# t$ |6 t ?2 {% K - }) `- |# r" B* v" i) I
- * A) u8 ?$ V% N! a! C$ v$ x
- da = (g) => {//底图绘制
; c7 p' e6 _- ~7 H2 J/ v - g.setColor(Color.BLACK);5 s! k: B5 j' p5 @3 |
- g.fillRect(0, 0, 400, 400);
2 P& q- s: @0 o4 {5 N - }% f% D" l+ P9 d. H4 I& R
- - [+ L# d. S3 t! t" @# J% H
- db = (g) => {//上层绘制' }+ K" C' W+ z( B/ m% {
- g.setColor(Color.WHITE);/ ^! Y; y" ~: T" G$ t
- g.fillRect(0, 0, 400, 400);
^4 [8 r5 ^; z. v5 S8 q' z% ] - g.setColor(Color.RED);
/ [8 t! n5 L# F( {( m% m - g.setFont(font0);
9 @) i. H2 t% p# K - let str = "晴纱是男娘";
" v3 x; W9 p" n4 X - let ww = 400;
. q# v. `# K( C - let w = getW(str, font0);# i5 @0 p' q* P$ I
- g.drawString(str, ww / 2 - w / 2, 200);& P6 \4 t2 f, v
- }4 F8 V0 ^9 O/ [ z' |$ ~. u2 M
- ( g7 W/ k2 A7 n F6 b- B: m
- const mat = new Matrices();
4 w. L% l8 |; r H0 j: D/ x - mat.translate(0, 0.5, 0);# i& \/ e) b4 q3 D/ n
8 }: S& c( H c( p; V- function create(ctx, state, entity) {+ ]0 @' V, z) Y/ G9 b
- let info = {
6 c4 l( p6 y( U9 y3 R& Z - ctx: ctx,, O8 q$ `/ k( E2 Q- x6 ~
- isTrain: false,* D& T- r$ f1 s% [ ?* ?, ~8 S
- matrices: [mat],% m$ x) @5 J8 f: i: f$ |% Z
- texture: [400, 400],9 m3 m! c/ i# c; E* K' t
- model: {
$ K" y* i' J# q - renderType: "light",7 V$ S( s1 e& c) O$ |+ P
- size: [1, 1],- Y- U. J) C: p8 m
- uvSize: [1, 1] n, w$ E$ h- Z+ Z e8 J
- }8 T$ J: ]& d, F6 L2 z
- } T1 Z4 c7 m6 n% _
- let f = new Face(info);
$ V+ f6 \5 Q1 B0 r3 Q# j - state.f = f;/ t8 |4 P" d. c9 t; C# E
1 V3 O, E4 l# j7 M! j- let t = f.texture;
% K6 W. I8 q0 T: b - let g = t.graphics;/ O* p3 P' Y; Q7 y5 `* R
- state.running = true;
" q, q7 q3 O: y% N- [6 k# Y - let fps = 24;% o2 S5 P2 V4 J: O6 |
- da(g);//绘制底图
/ ^8 a' M) Q. S7 P& ^# b - t.upload();/ H% x/ T! H* X7 N5 Y' _! c6 U
- let k = 0;
: C, N) ^$ {8 d1 j, N/ }" D/ ]% k - let ti = Date.now();7 Y! A) S' H, B' R9 ]
- let rt = 0;% S) l Q% y3 N' Z9 @2 u
- smooth = (k, v) => {// 平滑变化
" q! t8 E+ L# ?& J - if (v > k) return k;' G6 m; Q6 j1 Q! m6 \
- if (k < 0) return 0;
" q' v4 c: c1 p* | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; J M0 Q; b9 H; i* C1 c
- }* B" b( G0 @2 d
- run = () => {// 新线程; m: K! W! g U" X
- let id = Thread.currentThread().getId();% A) V! D9 E- W' R$ l! ?+ R. c
- print("Thread start:" + id);& Q) V1 o# G) r& \9 h5 f' p5 B
- while (state.running) {
$ J$ S p+ a. b- o3 c9 v - try {
& l: z* w( C& O% k9 ]3 O3 ]+ G - k += (Date.now() - ti) / 1000 * 0.2;3 j; R2 I- I" `! V3 }
- ti = Date.now();
+ O6 [+ s6 w! E t/ w - if (k > 1.5) {7 i0 B0 K* ^% s+ v. g% A/ P
- k = 0; f: o; ^) s2 @* t9 W
- }" X g6 {3 U0 [( r7 y# u6 _# \% T% f
- setComp(g, 1);
8 {. L$ X8 L5 u' I3 F9 e - da(g);
' z+ x# ?8 ` |- V - let kk = smooth(1, k);//平滑切换透明度
v% Y% h0 y/ v - setComp(g, kk);
+ G6 i, @1 h, J- o - db(g);8 H$ r! M# Y% x4 T6 q
- t.upload();
! U2 \# i4 M7 ~9 ~ ?7 o - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 R' z1 y( i* ]4 W% a - ctx.setDebugInfo("k", k);% Z6 A4 o; _0 L7 \
- ctx.setDebugInfo("sm", kk);
$ X9 C4 w C7 d8 Z - rt = Date.now() - ti;
5 {( F" k$ u% W }- P3 L9 i1 J. W+ m - Thread.sleep(ck(rt - 1000 / fps));
. w) F" V6 U7 L - ctx.setDebugInfo("error", 0)7 T. B9 s0 K. j9 X
- } catch (e) {/ j, p) f! H2 O" w3 _' Y* U8 E
- ctx.setDebugInfo("error", e);4 @: R+ i' u6 _8 ^4 w2 O$ A
- }
$ h# i: W7 M1 K2 [& w - }
; d. a) J( l1 n/ \/ M- Y ? - print("Thread end:" + id);
" d3 a- o# K' | - }
1 `" u5 \4 |$ M' r" G0 S! u - let th = new Thread(run, "qiehuan");: `. _; s% B; N
- th.start();
/ [" B4 R9 X: y - }6 M8 T/ A- y# R5 U
- ; H- ^ |' l$ c( G& f+ v
- function render(ctx, state, entity) {+ `2 X4 n( U4 |7 ^ X5 K" `( V3 W- p) G
- state.f.tick();
; f/ N1 s$ L3 \- p! b - }! K9 t( k* g: J9 v$ F8 t9 s
1 A& _$ l! F& \* o Z- function dispose(ctx, state, entity) {
, k6 c0 E% y- D0 x - print("Dispose");: k, F w, P* q: H1 X
- state.running = false;3 H- ]- ]& G U) z. L
- state.f.close();
$ u$ [ ^- z& d7 D - }
; N! w+ l S8 a& c - 2 ?0 i2 ~ z! [, E
- function setComp(g, value) {
2 _! d, Z6 S( `) T- D r+ o+ c$ M - g.setComposite(AlphaComposite.SrcOver.derive(value));3 w" T+ C/ y8 t# i( [% D8 K0 k
- }
复制代码 ' @. l) h& I: _& y7 P6 {; @
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。, d9 ^8 }6 \3 a" r$ L3 e3 v, j
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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)3 `2 _. W3 N N/ i7 V2 c g% v
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