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4 H* y5 R% J s a/ ?2 I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。
: f" @7 y3 L" f0 ^3 k- importPackage (java.lang);4 M, `5 u8 w6 M1 _, r R6 ~
- importPackage (java.awt);" z7 M$ G ]" ?
5 T0 @- m. _6 \* L, Y- include(Resources.id("mtrsteamloco:library/code/face.js"));: c" K% W8 T. V/ n6 e; V. L& U7 O
- $ P2 T9 l( u/ c! i0 T; W
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ N3 l3 z; z9 Z. j4 }- C
% R" I7 J% h8 C$ i7 x- function getW(str, font) {) _; K4 @, P- H, M: F: w
- let frc = Resources.getFontRenderContext();
N9 V {' A: K" P$ x6 c7 n1 t3 z* d - bounds = font.getStringBounds(str, frc);
2 Q: [* P3 [9 y, z - return Math.ceil(bounds.getWidth());- m9 n! }% o) b' u7 Y6 {0 \
- }
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- da = (g) => {//底图绘制" k! K# y% c0 h0 V: Q1 Z5 W0 J1 `9 c2 L
- g.setColor(Color.BLACK);
; o- k' m: i7 N4 ? - g.fillRect(0, 0, 400, 400);) l7 O$ i& G2 |% U E
- }6 @: A4 {( ]9 H# R
- ; a9 J7 C! L2 q" j3 Q# P A+ q8 Z
- db = (g) => {//上层绘制
3 w. Q5 K7 M# k3 ^ - g.setColor(Color.WHITE);
5 x$ m. u- l% b! ]$ l) z, S - g.fillRect(0, 0, 400, 400);) b# R4 `+ c V/ W) D- T; q
- g.setColor(Color.RED);
" ]! ~- D8 F4 ? - g.setFont(font0);
3 R/ W6 S2 s# s. M: Z# ` - let str = "晴纱是男娘";
9 @: R" Q$ F8 J) \ - let ww = 400;
- L4 f2 _: H9 `$ [2 ]- Q- y - let w = getW(str, font0);4 [- a, ]! m! @' N% t+ f
- g.drawString(str, ww / 2 - w / 2, 200);! W+ C! d3 ~3 _/ ?0 j T; E$ \
- }
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- const mat = new Matrices();! t3 B# E( V, T- E2 B
- mat.translate(0, 0.5, 0); R$ I8 ?5 T. C
- y5 F# ~* \6 g- function create(ctx, state, entity) {
c& B/ c: C! V# d3 r' `/ | - let info = {/ j7 ^8 S& w3 G# v; `
- ctx: ctx,2 ?" v. A3 {8 M) U% ?
- isTrain: false,
6 R2 }0 J$ W/ w9 x0 E - matrices: [mat],
( k& v6 f* m( t3 J2 X3 [ - texture: [400, 400],5 W# p) Y: @: N7 M3 m: q F. \9 s
- model: {5 P1 |: A5 @: ?6 o- C% a( a5 [
- renderType: "light",& `' A5 T" \1 H2 J
- size: [1, 1],
- t/ c" z, E- @/ A; N4 Y. M - uvSize: [1, 1]- a) Z; Q( ~- _* O5 j; d
- }: S* h" V4 {; t
- }
1 f1 n$ ^( y8 }; Q( m5 y - let f = new Face(info);
- h9 y3 Q- m6 x. ` - state.f = f;4 ?: {2 n8 X: K4 X% [
- 4 U& f7 |/ M8 x4 D# s5 p' n0 D- a: [
- let t = f.texture;0 U" ]8 u: ^. V$ |) B: r
- let g = t.graphics;% s# R3 _% y! K
- state.running = true;$ p& D$ c5 A3 ]. l
- let fps = 24;
3 G* D* y$ x3 I# i. d6 v - da(g);//绘制底图3 m* h( _& \! ?" ]1 g4 V, h
- t.upload();# D9 K# b5 _8 \; E5 o2 t
- let k = 0;
: {! {! [+ c5 H3 x - let ti = Date.now();
* G9 j4 r2 L2 y' Q, R* f - let rt = 0;
X& u- ~; ?0 J1 M( ^4 f - smooth = (k, v) => {// 平滑变化& U# i/ |) B+ m( s3 `( i
- if (v > k) return k;
" P6 o8 y+ {: x, I3 w# L3 {" z - if (k < 0) return 0;
9 _$ X# ?, o1 B+ ^+ v3 K - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: L. n* u3 O* u
- }
* C5 P* g* c% D0 h \2 v1 b5 O3 ? - run = () => {// 新线程. L' K Z2 L) w j" C" `1 m
- let id = Thread.currentThread().getId();
^6 j8 ?! `( a' I* x - print("Thread start:" + id);' F8 n; [$ Z j/ \. m
- while (state.running) {
, P" q" Z+ Q7 K5 G - try {
% O* i+ d; _, n, \ I' o. O5 A - k += (Date.now() - ti) / 1000 * 0.2;% {1 o- z" @; n4 R+ y+ {$ G. }
- ti = Date.now();
, q, E4 C* S: X* H z$ T# M, s - if (k > 1.5) {
- f6 c; k4 t7 y; n - k = 0;
* U9 q+ l3 M1 C! A0 _8 [8 y - }
( D6 H5 y- }/ [% n3 \) b3 q- _ - setComp(g, 1);5 d# P. o; h: h) S5 J0 d
- da(g);
, E2 ?* q3 R6 p5 {" R2 S0 H - let kk = smooth(1, k);//平滑切换透明度0 B& i2 b& Y) F8 z
- setComp(g, kk);. F+ E! ^- z0 g% G) v
- db(g);
) o B0 m P1 W* Z1 F6 a: g' p - t.upload();
h2 A g0 K, D- Z) o* Y - ctx.setDebugInfo("rt" ,Date.now() - ti);4 e0 X5 b* B" f* E! G
- ctx.setDebugInfo("k", k);$ \( V1 Z& a! J& I
- ctx.setDebugInfo("sm", kk);1 p+ q% E. t' q/ n9 k
- rt = Date.now() - ti;
/ \+ R& Y0 x% k M! F - Thread.sleep(ck(rt - 1000 / fps));
- g3 i6 ]$ [9 W - ctx.setDebugInfo("error", 0)
$ B, _$ a2 m6 Y1 b - } catch (e) {; i+ B1 N7 q7 |) T
- ctx.setDebugInfo("error", e);
' X) M& _8 W0 B9 I0 E& f$ J* B! Y - } w5 `% _6 n& B* A+ l! M% r
- }/ W+ [8 o3 S. L% v5 e
- print("Thread end:" + id);+ c) e5 a" ^9 |% S0 A
- }
( n$ }) \' v1 D8 N) V1 H: Y - let th = new Thread(run, "qiehuan");7 C+ c3 r+ j+ j/ }" S1 ~) j
- th.start();* ?. k3 ^. A- T3 P- b
- }: c! ]) p. A5 c3 S3 |
* F! ~2 s+ Y5 }/ q8 p( }# F$ `% \- function render(ctx, state, entity) {3 E2 A% a7 a) x. T) l) R
- state.f.tick();
, p. {( @7 [8 a& Z& G - }
4 B' S) t w! d; G$ W - " v; z# f# X9 F7 J+ m5 O
- function dispose(ctx, state, entity) {
( }( k9 ]% Z/ b: L - print("Dispose");
- n% x1 W; x/ v' R5 S - state.running = false;
$ ?" J: r7 h; z: y; o - state.f.close();' k2 {) X9 Z/ W
- }
0 e* N1 _. @) P8 ~ L - 2 c% F6 {- [: k2 Y# _% T" q0 k
- function setComp(g, value) {
# ?+ [, f5 A3 L, ^; z+ Y - g.setComposite(AlphaComposite.SrcOver.derive(value));
|4 n, F4 y, g8 K8 u# [0 @ - }
复制代码
* C1 q4 L* a& v4 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。
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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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