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( s$ W1 G- @: U o) D4 ^" P# P N9 D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。
* D9 t) ?- ]$ E0 G4 X1 e" K& e- importPackage (java.lang);
1 R8 g6 O' V$ o' u - importPackage (java.awt);, Q) Q9 T$ `( `6 C; L! s. j3 p" p2 d
- 5 N1 ?1 e% D, l1 a+ Q, t; ^6 |
- include(Resources.id("mtrsteamloco:library/code/face.js"));
4 H9 _8 M9 } H! n! i
) p% c( v( _2 D: { H# m7 f/ e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 f$ H) X1 i. x9 B; L# c
, K2 a: O: D" W1 ]: b& P- function getW(str, font) {" G; o7 C. B* V- t% F& j
- let frc = Resources.getFontRenderContext();7 }# k9 J7 c& Z; U
- bounds = font.getStringBounds(str, frc);
2 a7 v# M9 I3 a, @% x% i$ \- c - return Math.ceil(bounds.getWidth());$ B) k3 C* j5 c
- }
1 X4 @4 _. A5 W( `: x; H - 9 X3 @2 @5 m6 ?
- da = (g) => {//底图绘制
" |/ S; {6 @( j2 _ - g.setColor(Color.BLACK);' V" H& ]( i5 S/ N* f
- g.fillRect(0, 0, 400, 400); y. C' \5 M% c7 k
- }, V7 D$ E8 Y3 T. M, }# y* e1 D- p
- - |4 i6 m' M- k$ Q
- db = (g) => {//上层绘制
# ]- Y4 m- u* d2 }- y - g.setColor(Color.WHITE);
9 {3 |) T" O' ~' W' u - g.fillRect(0, 0, 400, 400);
0 J! D9 Z' [$ ^$ \9 p - g.setColor(Color.RED);5 e* P1 p9 v* N, G0 E7 n) Y) m m* M
- g.setFont(font0);
; z$ {1 B r/ S - let str = "晴纱是男娘";+ Q1 w5 q2 v, z+ T* e, M/ c9 ~4 h
- let ww = 400;
" }) j; X, |5 S9 e/ X& W1 N* B2 u - let w = getW(str, font0);2 a: ~' {/ n7 u$ N2 {; n9 [4 V
- g.drawString(str, ww / 2 - w / 2, 200);/ M1 W* i, \2 b* C
- }
' ?' _0 r p- j, a$ }
4 a9 G2 p* U( W) K, i0 L- const mat = new Matrices();$ t* T% p* E, z3 f0 w
- mat.translate(0, 0.5, 0);
# c5 B$ G% K. R3 J3 F% P! q/ T
! S+ N( k; L; u) h/ h% ~+ I( Z- function create(ctx, state, entity) {
, V* g: m1 U5 J$ u' ~ - let info = {
+ S' `, O/ i5 r6 v* z: X - ctx: ctx,
0 \' L# V2 U! b" K" i6 I% y - isTrain: false,- O* N7 p2 r( f
- matrices: [mat],4 m# M# K' p) k% D# ?+ g& x8 K
- texture: [400, 400],& k/ f" q- K# B# J
- model: {5 y( b l" ~) i/ v5 u) n
- renderType: "light",& P7 I1 R: P) x! f5 q# K( r) M
- size: [1, 1],
- V, y' y/ I6 Q2 o4 g( d+ n. ?: m" y - uvSize: [1, 1]
' F. u9 j4 S$ k, y' Z - }
1 X& U/ ?4 W. P2 [ - }
: Z. m, G/ A+ ^: F' w; | - let f = new Face(info);
3 H0 K$ h# z- \, @8 ]3 J" s" W - state.f = f;+ _: \4 U1 E# a% I7 `
9 ^( o+ c$ A: X8 f5 {$ _- let t = f.texture;8 H) v( f0 H" S! Y8 {
- let g = t.graphics;
0 u2 n8 _1 C8 M% a) c" p r0 Z - state.running = true;
: U- ^" o& g+ _+ X1 H; e$ D% X. X4 C+ T - let fps = 24;: M+ A$ w3 Q6 o. W) L1 L! ~
- da(g);//绘制底图
* [ c% [3 Q0 E5 I! ~* } - t.upload();2 e1 S/ ] L* X1 K+ X+ \/ \
- let k = 0;
" M8 ]$ W7 b2 P* k: j6 Z# Z( R - let ti = Date.now();
* s' F( W( S' {8 f: ` - let rt = 0;
$ r- \$ S& a/ H1 f - smooth = (k, v) => {// 平滑变化 c2 O( ~4 a$ B% ]# ~4 h
- if (v > k) return k;9 C2 K- W- ^& H- Y) ]4 k2 ?
- if (k < 0) return 0;9 b5 }7 y3 I# r3 ?! c. P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 N+ {2 d8 D6 w [+ E! n" c% c2 _ - }
+ m8 u. V8 V4 z* d/ f - run = () => {// 新线程
# z. Q) w, G6 C* K1 j - let id = Thread.currentThread().getId();" X+ P& i& _, Z
- print("Thread start:" + id);
. P* {$ a0 u. F- a. {. f - while (state.running) {
) D* o, L3 k! x0 k3 ~' z& e - try {/ y) |* ~+ E7 x
- k += (Date.now() - ti) / 1000 * 0.2;& j! p7 W! r* l3 T
- ti = Date.now();
$ L) {' `1 S9 J$ @0 } - if (k > 1.5) {
% B( O) s/ n$ }( @ - k = 0;0 x7 X" b- g$ {2 W+ r! o: S
- }
Y+ L5 e$ i; l4 x/ j: i( _5 x - setComp(g, 1);
% i- i4 v0 I! w - da(g);
9 u) v: n: _, o/ R - let kk = smooth(1, k);//平滑切换透明度
; b( I& C9 U6 b - setComp(g, kk);4 s2 Y } [- }# I
- db(g);2 l! [' P# U3 y* u k: }
- t.upload();
: \$ P# w' V9 k! X - ctx.setDebugInfo("rt" ,Date.now() - ti);0 _3 r- o6 J* u% v
- ctx.setDebugInfo("k", k);1 X9 X* k2 i7 {% l3 R/ l
- ctx.setDebugInfo("sm", kk);
* X) Q! G( I' Y& i* u+ \ - rt = Date.now() - ti;
/ u/ I. m- }4 r. q+ _! u2 r+ ]4 ? - Thread.sleep(ck(rt - 1000 / fps));" J7 X, ?2 @8 j" H. Y7 d) W
- ctx.setDebugInfo("error", 0)
. w* Q5 G% Z7 y& O) y - } catch (e) {
+ r6 \9 s; M6 P4 V3 a, [! N4 U5 x - ctx.setDebugInfo("error", e);
% X3 F+ h- h0 {6 ^7 ? - }% ~; t& G, l$ u
- }
; P! h) t4 z$ P X K# U0 J - print("Thread end:" + id);2 j9 X5 E+ C- g+ g( r0 }% q0 H6 M
- }
. d l6 Q: `6 w( D - let th = new Thread(run, "qiehuan");) T0 W; M) N8 H! `; j" b
- th.start();
0 N! k, b" `7 D+ Z0 Q) m9 l - }- \- I2 \- Y7 S! T2 d3 n
- 8 o& g" [" V. Y6 o. E7 B! C; I
- function render(ctx, state, entity) {
0 {* {" L: O L! Y; { - state.f.tick();
' D4 w1 w' Q4 N& T8 [9 @: m - }- I/ v7 m! e9 h* R/ V7 q
/ i3 p& \8 T- H$ z/ I* l7 R& z- D- function dispose(ctx, state, entity) {8 ]# T& y& r' K# Z% o
- print("Dispose");
! j/ j# g g+ `" e/ W" Q( j, \7 _4 B - state.running = false;
( _2 ]! ?) [" i1 ~ - state.f.close();
$ y1 D! g: \+ L7 |/ l9 ^ - }: k% |+ a. W9 @
) u4 S5 T7 l4 q2 f4 u' w" v' r' x- function setComp(g, value) {
& x& V' M, c9 ^: t - g.setComposite(AlphaComposite.SrcOver.derive(value));
( U$ g. N, S m+ [! Q - }
复制代码
0 a1 k4 }1 m2 f' P# C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。
$ {5 h. {# ~, m1 v8 y0 x9 ^- k+ y# f7 s) |* a4 G* s
6 k3 t. N5 A: Y5 u4 D N& K: l$ x
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)2 d! m8 a; ^# f N d' B5 G
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