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1 i0 o# J$ g$ z( H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。
1 m8 `8 z. v# a) V0 K2 R- importPackage (java.lang);/ {. L- b; \7 P1 e6 C
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( J: |% I" q3 s: h$ F, I
) l! o9 u# m" Z- function getW(str, font) {
. A# u. w7 o9 \" R$ H- K - let frc = Resources.getFontRenderContext();
1 a9 S1 \6 e; x- @9 T - bounds = font.getStringBounds(str, frc);2 H0 w( x' g. J4 Q" O( {, n
- return Math.ceil(bounds.getWidth());# A) X* N: h% A/ D' D' C8 G& M* e
- }
3 b2 m" v. [9 C4 {' n4 A - : `: \% X L3 Z3 S; _4 n
- da = (g) => {//底图绘制4 \& v B6 R3 \6 h8 r9 c
- g.setColor(Color.BLACK);7 Q9 ~5 }, b" p. p
- g.fillRect(0, 0, 400, 400);
6 J& u' Q2 X" ]4 Q/ ?1 [. q5 p - }( a h& `) n8 s3 \$ X+ J
7 ~6 y' y8 h3 W+ w# C- db = (g) => {//上层绘制
% a" E2 n0 ?+ k( S3 e; p - g.setColor(Color.WHITE);
: H( h+ b8 `6 O0 X, e- b, { - g.fillRect(0, 0, 400, 400);
0 K) s9 s% T$ \$ }" G% m2 W - g.setColor(Color.RED);
9 c s; b2 v: H. n6 W; S1 z! m - g.setFont(font0);
- D2 |1 u. i' P j' ?' V" P1 Z - let str = "晴纱是男娘";
+ Q. a. X0 b7 ~+ a- `$ l0 v! F - let ww = 400;8 a4 |5 g' ^. k# u1 ]
- let w = getW(str, font0);; @$ D. ^# @9 n$ g/ w3 |
- g.drawString(str, ww / 2 - w / 2, 200);3 l* w5 x/ j+ [
- }
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- const mat = new Matrices();+ Y$ N( s& D A! w- c# H( X
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
: T, D! r# v* p5 c - let info = {
1 G& J* W7 W3 R3 q% g - ctx: ctx,9 J* r. M* D3 e; p9 e) W
- isTrain: false,$ c; o- w% L. ?3 j2 ?/ X
- matrices: [mat],1 Z- w% g# _1 g3 `. c- {
- texture: [400, 400],. c' y8 d: M$ w) f& i) y0 y& i, J
- model: {
8 c/ t4 z( y% d6 r - renderType: "light",. Y7 [& M/ e) ?, r5 M2 b4 p- Z+ |4 W
- size: [1, 1],: W0 Y& F1 Z9 Y" Q( F% q
- uvSize: [1, 1]
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- }
8 Z( h" ]/ u) t( N3 ^ - let f = new Face(info);
9 V2 M4 j# ^0 ^+ {& ] - state.f = f;
: o8 M4 E3 c' |- I' T3 _ - 5 ^! z1 Q6 ^8 D' e
- let t = f.texture;
1 l* D( w8 V5 F( [ - let g = t.graphics;
9 X! O- {( Z! Z. Y3 F - state.running = true;
" b) ?% A/ G# f9 {/ {1 M ` - let fps = 24;( [+ x2 T% z5 ^. S# C
- da(g);//绘制底图7 n" K# E1 d2 s
- t.upload();
( I1 y. k' V0 e- J5 X- W - let k = 0;( T9 t' e, U, h' ] `
- let ti = Date.now();4 w# I, S7 ^* w8 G4 ~* x: ]. Q
- let rt = 0;
; W5 o" U* v. Z6 |9 t; [3 S - smooth = (k, v) => {// 平滑变化
" X9 H1 i# h/ V3 Q/ @ - if (v > k) return k;# h# ^2 j$ g. l2 q
- if (k < 0) return 0;, f) q" Y! g+ p/ ?( ?8 y* g& j
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 h! y$ m1 S. ]. }
- }
a( Z. U0 O( o, i - run = () => {// 新线程
4 c; h) z a0 y; S - let id = Thread.currentThread().getId();8 s+ I4 c+ Y" V& K
- print("Thread start:" + id);4 z2 ?4 b' A. z U6 x
- while (state.running) {
$ b/ I" j5 c+ ?8 ^$ l - try {
* O- [# k# ?4 R: P& d - k += (Date.now() - ti) / 1000 * 0.2;
$ k+ }; m& m* B7 p0 S9 P5 {. e# r- f - ti = Date.now();' s1 x9 E$ }2 a
- if (k > 1.5) {
% ?) B2 a! y5 \" _ - k = 0;; E: A" \/ e9 m3 C
- }. g- A3 D0 V# b( }# X8 V
- setComp(g, 1);0 f+ B& z I: e! w( ~% _
- da(g);
" Y& R! ^) h: _ - let kk = smooth(1, k);//平滑切换透明度# [# Q' `+ F- C. ]
- setComp(g, kk);& Q+ a. w9 ]" n
- db(g);. d9 F- T( {1 q
- t.upload();( q# S" k% X, e; ^% {8 J
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ l$ ?) {6 E- x* O. a8 c a/ l - ctx.setDebugInfo("k", k);
2 m; X+ s7 o- Z* a3 g& o' l - ctx.setDebugInfo("sm", kk);
' ]$ n2 ]2 ?& X7 J; V y - rt = Date.now() - ti;4 [- d% R" U: s- I0 J
- Thread.sleep(ck(rt - 1000 / fps));/ M: E u: h" c* g3 q/ F
- ctx.setDebugInfo("error", 0)
% z: |' n, R+ N4 j - } catch (e) {
$ L2 @% S$ g+ H - ctx.setDebugInfo("error", e); e7 _3 {5 P6 f7 q1 v6 s# E
- }
* b. U9 n( E, k; a# h - }
# z8 }/ b3 D. I' _6 K1 _8 _2 E - print("Thread end:" + id);" k# X6 P5 E- G1 B* J
- }
- F0 A: W' w3 N0 ^- D4 n - let th = new Thread(run, "qiehuan");2 J& I; D# @& U- h
- th.start();" A$ N) d/ J7 Q" ?( W$ S; f
- }
* A3 ~( q1 Q; b% I7 T+ S& t
2 |3 H' M& Q- w9 o* e' A- function render(ctx, state, entity) {, [3 q6 y, M8 x, y8 Z$ H
- state.f.tick();0 T: d( s! o1 P$ N
- }( S$ }2 b- z) @% T* |0 y
% T6 v5 v, r! p2 I, J/ j- function dispose(ctx, state, entity) {6 J! {6 `. X4 g3 S0 D
- print("Dispose");
2 ~8 b$ V0 m) f& J# B& \0 m1 d - state.running = false;, [( t; c2 ]7 H, s. S& I9 i
- state.f.close();
' B/ o0 R4 q2 m8 k6 O" k& E, p$ M! A - }8 k5 X7 Y8 B5 x# I7 ]6 W) {
6 n! a, q% x+ K7 z% ?7 Q- S# P- function setComp(g, value) {
. V4 R4 Q2 b x; N- Z - g.setComposite(AlphaComposite.SrcOver.derive(value));; `5 c4 }2 w! I
- }
复制代码 ) ?$ m$ t) N, c' Q
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。) X+ F0 z- H+ v( Y2 [5 u% D* U+ W
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: X' N! N/ y' ]9 Z. t6 V顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! x0 e* i9 C& [! f
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