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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。3 d& n+ E' R: Q1 A9 p |( @
- importPackage (java.lang);8 U' x( v( t: q/ B$ m
- importPackage (java.awt); u+ b. I$ B d6 H+ ~
j V" @4 I" j6 a. C* c W- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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* x8 l% U) a# o/ E* e5 t1 I- function getW(str, font) {8 r1 l6 X2 S% o* y1 r( \9 K: A0 D
- let frc = Resources.getFontRenderContext();8 |( r" O9 C& w( F3 N( r. {5 I
- bounds = font.getStringBounds(str, frc);" h8 R1 ?5 Q& n5 p8 z" {
- return Math.ceil(bounds.getWidth());
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- - c' l4 [7 }8 Z9 R
- da = (g) => {//底图绘制
3 K1 d+ [6 K1 U: N3 { - g.setColor(Color.BLACK);. S& ^; n7 [/ e# q: z! M! D. N
- g.fillRect(0, 0, 400, 400);) \7 s, V9 n" d! R' g0 I$ `
- }% [5 z# d2 i5 H! T( Q( H Q1 H, O
9 [; d E- B# Y! t1 p- db = (g) => {//上层绘制3 ]1 w! b& D# {( m
- g.setColor(Color.WHITE);) V2 x' \: R' I- o) Y0 m$ u
- g.fillRect(0, 0, 400, 400);
6 k1 O/ B: V" F. K$ S2 |; L$ X# C - g.setColor(Color.RED);
. H/ j- ?2 w, O1 v3 H - g.setFont(font0);( I" d: ?0 O p5 Q
- let str = "晴纱是男娘";
5 ?3 |1 t: H: U! O - let ww = 400;/ @+ |' ~1 p' {7 j4 |8 ~3 C
- let w = getW(str, font0);
4 O" j. F/ ?. P* f2 R - g.drawString(str, ww / 2 - w / 2, 200);: K# y \. p6 J- e# [
- }) Q1 U. ^5 C8 }0 H8 j% N# S
( h3 m/ o1 N! k& R z8 p- const mat = new Matrices();& w$ |# a2 X1 r# t4 T
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
9 p) ]/ `2 s- v" W* B - let info = {4 M! z" E5 l- S5 P, G8 |- K6 H) v$ D
- ctx: ctx,6 B' z* n9 C0 P" r" V: Y L8 r
- isTrain: false,3 C; d2 Q( y- Q( y
- matrices: [mat],: ]/ |& h9 j( S+ |; A3 {& j
- texture: [400, 400],
$ y4 h& p5 S9 ~) Y7 i, t( I$ a - model: {, B* ]/ K" o9 z+ c9 w Y4 n
- renderType: "light",
$ M$ }' j; F8 g% T! R1 c - size: [1, 1],
% F) h: c$ T Z - uvSize: [1, 1]
% k9 e9 h8 c1 R - }
; l: \- J& \* r' Z1 L - }
. y0 {* Q& ]0 V ]+ \1 ~7 L- \9 |& T - let f = new Face(info);1 r* ?' \, D. y$ F8 s" ^
- state.f = f;
. N" V$ [- k* x( J1 q - / z' `+ I. H z9 ~9 o
- let t = f.texture;% h- r% Y- m: ? z1 M
- let g = t.graphics;, S' J$ w- J& h( R
- state.running = true;# N9 V7 \% `! e) M0 ]5 W$ D
- let fps = 24;
# p \3 R! K2 r' Y - da(g);//绘制底图
3 v1 m, Q s9 M$ K - t.upload();
7 C/ x, G- x/ A1 K7 ? - let k = 0;
* t; d( k2 T+ a5 u/ ~ - let ti = Date.now();
+ u" I8 C6 `) J) v4 [; C - let rt = 0;
X; X) S* H3 F+ G$ ?( a - smooth = (k, v) => {// 平滑变化4 I7 U& \1 d% k4 l( m( l2 Z, f
- if (v > k) return k;9 i. e+ C, {" D# s" m8 h
- if (k < 0) return 0;
: i+ f+ V" v1 X, X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; @ c B& ?- W+ B! f; u/ ?
- }( [( N7 u. s) a! j
- run = () => {// 新线程
6 c5 I+ R" G9 n( T& k - let id = Thread.currentThread().getId();& u, }! {$ P+ H
- print("Thread start:" + id);. A) p R2 K7 p& B5 u
- while (state.running) {+ C) g M! r/ r4 i' q @
- try {
9 S- J: Y5 n a8 O) Z1 z - k += (Date.now() - ti) / 1000 * 0.2;" H8 I; w" P0 v9 [
- ti = Date.now();* G' t+ z- ] a. G& E* e z6 z3 ?
- if (k > 1.5) {
3 `: E9 {1 Q8 R" K2 L, ` - k = 0;
" G! I$ Q! Q/ V2 O - }
; _4 h5 @& E7 y$ t1 l6 } - setComp(g, 1);$ \4 Y: D: C4 V8 y7 W' H
- da(g);6 l+ h& K1 Z3 E
- let kk = smooth(1, k);//平滑切换透明度
2 w0 A! C/ A4 U; `4 X3 ^- K - setComp(g, kk);
' q4 Y# b; T; J* S* c - db(g);
& ^! F9 X, N6 u5 a9 i. h' J - t.upload();
. n2 Z* ^1 ~* B4 M, s - ctx.setDebugInfo("rt" ,Date.now() - ti);
( @* x# K5 l- D+ d* a$ h, ^ - ctx.setDebugInfo("k", k);
4 E5 ]- `, w" Q0 K2 C1 x - ctx.setDebugInfo("sm", kk);
7 F" t3 ^" [: k$ h9 E - rt = Date.now() - ti;; f8 n; N5 T$ v# w# l q% j5 s: L# T
- Thread.sleep(ck(rt - 1000 / fps));
2 I1 ^, b z. T- d6 Z7 z$ H - ctx.setDebugInfo("error", 0)
! f0 l) x2 ?9 u& ^$ @- D& U - } catch (e) {
( K |& ? s. s - ctx.setDebugInfo("error", e);
$ y9 n6 Q" M& O" f - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");/ v1 T# K) D# A6 a3 e/ \8 K
- th.start();
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- ; x, l) }& `3 D @* x
- function render(ctx, state, entity) {5 \4 x6 o. c4 J: I8 M
- state.f.tick(); h; L: X4 Z" Y5 L5 a; `! X \
- }9 k0 |8 M2 R$ W% ?4 H
$ r8 Y n1 G9 A D) P' O: O- function dispose(ctx, state, entity) {
% H* V, v/ G+ v5 y5 ` - print("Dispose");
]. m1 K9 L4 V7 c, C$ {# I3 |: H - state.running = false;3 b! Y8 g+ ]2 F9 H
- state.f.close();
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- * k# R' t2 \3 G, O, o
- function setComp(g, value) {
: _4 R7 Y0 e: `8 O( v6 h" F8 R - g.setComposite(AlphaComposite.SrcOver.derive(value));
: m- |8 j3 ?6 F) c - }
复制代码 " W8 z. A1 W5 y" u# 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。. Y: }* [3 ^8 k! J
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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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