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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。
- b/ f! m) k ?6 D( B* z# u- importPackage (java.lang);
% ]$ Z) x @3 p3 f& t - importPackage (java.awt);3 e/ z' ]+ x7 R3 |! v# m: K& D( n2 \( D
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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H' n, {4 F' E+ k8 A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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2 e. O' [& w8 V' e. g- function getW(str, font) {
" E+ Q% ~2 J; R! K - let frc = Resources.getFontRenderContext();
. q9 Q6 y) T/ H% h - bounds = font.getStringBounds(str, frc);
6 C( E+ h" g" j3 w3 T4 @, E3 `" J y - return Math.ceil(bounds.getWidth());
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+ b6 q' E/ |% ?1 `$ F3 ]1 S+ Z- da = (g) => {//底图绘制
2 T' c1 H2 R! J) j& c/ f, D, M - g.setColor(Color.BLACK);1 M( y- h; m! f3 `
- g.fillRect(0, 0, 400, 400);
9 q) [( w" O4 {1 s) w - }4 C/ u/ }; p) n J6 a
' o' G \& M l" u+ [- db = (g) => {//上层绘制
) ^, v. J( ]* y- Q - g.setColor(Color.WHITE);0 m M7 F+ V$ w' ^" r: l8 Z
- g.fillRect(0, 0, 400, 400);
# c. T6 ^ V+ L `/ Z6 t - g.setColor(Color.RED);
' A" w4 p' }; L4 U - g.setFont(font0);% ~9 g. b( q; H6 g2 [1 C% t
- let str = "晴纱是男娘";; _( U4 o0 I+ s
- let ww = 400;
( {7 S U$ b9 f/ r w - let w = getW(str, font0);
8 G3 T* o7 {( {. K - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
) J0 W0 L! S; T& W( U4 o: C - mat.translate(0, 0.5, 0);: ?; e, L2 o& P& v: `( F
# [4 l7 a H# S8 v8 \+ e9 ^# I9 K- function create(ctx, state, entity) {' H# Q0 h% S( \" \
- let info = {2 M0 C& {: ~; j5 A% J
- ctx: ctx,- E7 g3 s" V S8 ?5 c
- isTrain: false,
+ @: I# q' @4 D: v s - matrices: [mat]," L$ |9 O" G0 U! s' ^
- texture: [400, 400],6 G) P" J% \7 K: ^# H7 r
- model: {) n; r- F% V; ~) t
- renderType: "light",3 i: H8 q7 V& V) U- J4 v, C7 J
- size: [1, 1],
: M$ I9 f: W& P a - uvSize: [1, 1]+ O+ W# |0 M1 U$ c
- }
7 G( h- V% D- ~9 T8 |6 T - }8 Q3 x$ l9 |& z' U9 J y- }
- let f = new Face(info);" Y' `8 S+ N4 _% _- t
- state.f = f;4 n" Y# Q" |! g, y
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- let t = f.texture;% f: G0 `! R( {3 C2 T6 a: h- r( q
- let g = t.graphics;' R \; {7 h9 Z1 d2 ~5 l& |
- state.running = true;0 ?6 ` b- r( S" M+ b
- let fps = 24;
/ r2 P( F6 Z! ` - da(g);//绘制底图
$ q3 e" ]8 Q4 Y: j - t.upload();
) D$ O* G t. n# |& m8 y5 S - let k = 0;+ T. f, M, E4 c2 M- U; @. {
- let ti = Date.now();3 d$ l7 T$ G( X0 Z7 S; `2 R q
- let rt = 0;& C, N/ P' f! o5 x* H
- smooth = (k, v) => {// 平滑变化
4 |3 ]8 M3 |. q' I1 ^$ x( g6 J1 d - if (v > k) return k;+ M$ A- A. P4 z3 g, Y4 {
- if (k < 0) return 0;
) W9 w+ C: P- c - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# i+ U2 t; G9 s5 B
- }
8 [$ A3 H3 J' i0 v% b - run = () => {// 新线程
( H, n, ~& n. H5 @. n - let id = Thread.currentThread().getId();! i: O) w0 g( x& Y; M" `. ~- v
- print("Thread start:" + id);
: ^$ C$ w O: {) T$ m - while (state.running) {/ M8 [" q S$ f8 N( W
- try {
" S# Y4 B" O l. X' V" _- s - k += (Date.now() - ti) / 1000 * 0.2;
3 ?! b/ x/ P, e! D0 r& c - ti = Date.now();5 K: r2 p& P( ^$ \5 M0 {
- if (k > 1.5) {
4 y, w' z3 ^) l9 M) }4 m: L - k = 0;
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- setComp(g, 1);
0 w4 q: a; U: M0 M4 q; I. O - da(g);# n' u9 Q* @3 m- s0 {1 u
- let kk = smooth(1, k);//平滑切换透明度
0 f8 ?3 F% b, a3 r z* i2 F; g - setComp(g, kk);
" f k2 H/ ]# ?& l4 C6 g, A* _ - db(g);
, J9 _% `" r; k2 a - t.upload();
& }% R/ K7 c. k - ctx.setDebugInfo("rt" ,Date.now() - ti);0 O9 ]# o( P. C3 P" ^
- ctx.setDebugInfo("k", k);! ]2 @ ]& ^5 Q' ` r
- ctx.setDebugInfo("sm", kk);' U9 N `, |) x' c! B
- rt = Date.now() - ti;: W, W5 g, O+ Q3 k
- Thread.sleep(ck(rt - 1000 / fps));. @) `, ?6 U% |4 M1 B6 F( C
- ctx.setDebugInfo("error", 0)5 F: `9 M' Z! D5 r4 A6 W" M# W W
- } catch (e) {
& z2 ?- O* J0 u1 X+ G - ctx.setDebugInfo("error", e);
4 e) v" ?4 h: [ - }
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- print("Thread end:" + id);
; }# `& H' {5 v2 f# T; e - }
* L1 c7 o7 D R* E4 D$ W - let th = new Thread(run, "qiehuan");+ N$ S( Q o6 c
- th.start();
5 E; f! K# U& |5 U - }
- Y0 ^+ S8 o* ^3 [* _" J! } - + w2 t# M* A; x+ B6 {, j2 N
- function render(ctx, state, entity) {
! g5 D v" Q# w2 }8 [6 R' M - state.f.tick();) ?8 a0 B \+ A, ?# H1 ^
- }
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, K! u* ^8 O# a3 |- function dispose(ctx, state, entity) {
+ h5 f6 Y& U2 c/ A - print("Dispose");' t% v# k- _% U2 }' n2 \: n
- state.running = false;5 [# C4 H& c, v$ H. p7 v0 F4 X
- state.f.close();
/ n" T6 F' ?1 C0 _/ k6 b# v+ a) O0 n - }
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1 v7 t. Q8 B" \. T) F0 S8 \- function setComp(g, value) {# f) w, J; P3 p" D$ ^3 v9 F0 w
- g.setComposite(AlphaComposite.SrcOver.derive(value));
$ b) y8 i- j s5 S7 J - }
复制代码 ( j" }+ _3 |* p% ?( D4 b
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。
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+ {. z# ?2 Y. n3 r# u K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 ~( a5 r( L2 Q6 U9 f" p
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