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2 {0 _* [& x0 ?4 f5 k- F& l5 ]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。
' J( _& U* {! [$ P) _- importPackage (java.lang);# }; ]; [7 t# G) X
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));. U+ x/ c. ^& s: G9 q2 V
- & Y7 t* P& k* g7 _( I3 }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. F' w' N' C1 m& n- |% Y/ a- function getW(str, font) {8 ~ t: s9 ^" s8 g# H) d# M8 K( F
- let frc = Resources.getFontRenderContext();4 [8 ^% \1 k/ D* m2 ]9 b; }! L
- bounds = font.getStringBounds(str, frc); c& j" v/ S" z5 p) h
- return Math.ceil(bounds.getWidth());
2 G) Y! L9 Q- W# G+ Q - }
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- da = (g) => {//底图绘制
" R/ F5 U2 Q5 X# [ - g.setColor(Color.BLACK);
" I9 K2 j; U1 J& | - g.fillRect(0, 0, 400, 400);
# \+ b( p8 D; t) a - }
2 ~5 G4 k# d+ W0 m - ! C2 r$ X( |6 r* H
- db = (g) => {//上层绘制8 S$ `/ n3 u* y; n$ N4 u4 Z2 R
- g.setColor(Color.WHITE);
9 M. q% W Z- m1 d: m* m5 p! g - g.fillRect(0, 0, 400, 400);& a# U& b8 i% _- S. P
- g.setColor(Color.RED);
( x( ?2 y* P; f; c8 [6 Y - g.setFont(font0);
3 b8 f' I- ?% k1 a2 a% ? - let str = "晴纱是男娘";
0 d' `" b7 a$ k( i' G. b& c - let ww = 400;; Z5 X1 n' v' D8 \
- let w = getW(str, font0);/ _7 N# Z' X* R, ]. M; j
- g.drawString(str, ww / 2 - w / 2, 200);
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5 g0 e/ p* P+ @+ }1 Y- const mat = new Matrices();- I ?% s D& s* u4 j
- mat.translate(0, 0.5, 0);* P6 x* }* i Z" G2 Z
" j2 e: Z2 m, Z% n7 I; ?: B- function create(ctx, state, entity) {! w0 c" t5 a) T `9 s
- let info = {
' _+ D# g* q- b' U - ctx: ctx,
, _7 d# d2 S- H4 C - isTrain: false,
9 h$ |4 h7 T6 w+ @1 A8 z& S; V - matrices: [mat], Y1 r( y! S9 X1 y( C2 V% j2 ^
- texture: [400, 400],
2 x. H2 k. H! P \8 K" W! j - model: {
, P% L2 d8 b8 S& w$ ` - renderType: "light",
% t- m# x$ [3 j( i0 a - size: [1, 1],2 c5 _; n6 y* r3 h- l" s% h5 d4 t
- uvSize: [1, 1]
V0 c. m% f( A5 S4 O& v - }
* B; s% p+ J6 q - }
) l$ b% }9 {6 x( Z& Y! ] - let f = new Face(info);
$ p" F$ a) E$ [0 e - state.f = f;: z: A' \9 F, C4 S' L" M, L/ v
+ }) X2 X6 U$ P+ {' Y- let t = f.texture;
, U# a" l+ v$ H5 H R( u/ |+ R# D" c - let g = t.graphics;
# C% \) f& w3 G( {# m: y2 G( P - state.running = true; Y) g9 K1 A: [# i
- let fps = 24;
* B# @3 Z7 z( @" n2 o+ s - da(g);//绘制底图
3 a" B! w" ?+ @6 B - t.upload();
5 a, Z4 X- J. }; k1 d - let k = 0;9 i% Y5 }0 n; A# l3 X9 G0 m
- let ti = Date.now();
$ [$ e* ?; W c - let rt = 0;
$ ?- I8 K; o4 v* E& I0 Y - smooth = (k, v) => {// 平滑变化
; T8 O6 I) p+ C. L: m e. a7 @ - if (v > k) return k;/ T6 t$ _ d; e: s$ ^1 w+ J1 c
- if (k < 0) return 0;
7 h+ b: S* t q$ q$ s - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, x6 ~2 ^5 W2 H0 x! _ - }
) h5 W, m" ?5 Y7 z - run = () => {// 新线程! p' ]( }3 _" A8 f
- let id = Thread.currentThread().getId();
2 E1 P( w# s; ~& r8 C; O0 N - print("Thread start:" + id);
, E, h7 |0 v( e' d8 i. J - while (state.running) {9 _* j6 X/ K* `! A
- try {
% l9 |3 `: t. J - k += (Date.now() - ti) / 1000 * 0.2;
' v! E* o, ~/ ^ - ti = Date.now();6 ^9 D( V W/ @+ W
- if (k > 1.5) {3 _5 {3 J2 r8 l
- k = 0;
8 Y0 j9 b( B: r - }
% d: h/ G5 W* ^% H - setComp(g, 1);; e* N4 H* t) U& P2 z
- da(g);
7 V) q, Y; q8 d# h9 W( w - let kk = smooth(1, k);//平滑切换透明度- `6 |% c* G9 o
- setComp(g, kk);
) t; `# f3 W) y: [0 ` - db(g);
; ]! {1 h9 ^( r - t.upload();' ?( r) i, a( Q. t) [
- ctx.setDebugInfo("rt" ,Date.now() - ti);' M! o+ {* a7 V+ E0 v, F
- ctx.setDebugInfo("k", k);
1 s& Y3 U- F7 G- ^" n - ctx.setDebugInfo("sm", kk);
; L0 s: y3 ^* h7 p& p4 q - rt = Date.now() - ti;
! c: _. l8 v% D$ A( W$ d, _ - Thread.sleep(ck(rt - 1000 / fps));( w4 d) e) L6 a8 H g
- ctx.setDebugInfo("error", 0)4 P, j! U% k4 U+ c
- } catch (e) {* P9 ^$ D9 u0 C- s6 r
- ctx.setDebugInfo("error", e);
3 v& M) q6 a& ` - }
0 C5 ]# i I5 P. d9 Y% P - }
: E# o5 T% \- ~, E P3 f. C - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");) ^; j* e1 ~+ s' U! w# j
- th.start();
7 ^2 {- }" A2 N+ \: S2 S - }
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- function render(ctx, state, entity) {' `/ K+ N3 o9 ]5 e4 k
- state.f.tick();
1 V" J# f* v0 S* R4 z2 r- m6 A - }
1 h2 h J& l; I! J - ; u \/ m2 I) X2 {
- function dispose(ctx, state, entity) {
5 o- B5 d2 K, G- p - print("Dispose");
4 z! \5 o# R7 `2 t0 J - state.running = false;5 g$ {. L: N8 [9 y' W { C9 J$ z
- state.f.close();
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, Q. x" M T3 i* u% ~6 k, T; s3 R- function setComp(g, value) {
1 [% R# y: L( y3 ?6 w5 U! A - g.setComposite(AlphaComposite.SrcOver.derive(value));8 Q- d7 S! h/ z% ]& l3 A" D$ J
- }
复制代码
/ g* Q$ ~! x9 E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 ?! [+ X! y$ N) I
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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)
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