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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。 W: ]" |# I8 ]7 E# ?
- importPackage (java.lang);
8 T, F. W$ j2 s+ S: C - importPackage (java.awt);3 A2 G/ e2 G& X1 d$ S# A) x7 }
- * n1 h5 v: v3 z) @
- include(Resources.id("mtrsteamloco:library/code/face.js"));# e1 ]+ f, |) m& G
- ) v5 O _- A/ g$ y8 w4 E
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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M9 w3 \* B% v7 Q3 r- function getW(str, font) {* t5 y' A/ ?2 N
- let frc = Resources.getFontRenderContext();4 t7 Q+ N7 G- ]# h
- bounds = font.getStringBounds(str, frc);! }1 g# |8 E+ ?1 X; ]9 C
- return Math.ceil(bounds.getWidth());) l, n$ }0 r* ^/ C
- }
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7 l0 w" i# U6 z, C' Y Q- da = (g) => {//底图绘制
$ ], h6 a3 N% }. ` - g.setColor(Color.BLACK);1 a8 r S; c% G0 _
- g.fillRect(0, 0, 400, 400);
& M) W. K! d4 Z+ D! |1 v$ S+ F - }' ]( u& t4 K2 e: x$ }6 }
- ( G( k5 m1 Z( N! p1 ?
- db = (g) => {//上层绘制6 y8 `1 m: e: x+ J+ ^5 U$ w& f
- g.setColor(Color.WHITE);
# h! r$ N1 g+ ]7 B - g.fillRect(0, 0, 400, 400);: g: s5 U3 y( o8 @3 Q& l3 p
- g.setColor(Color.RED);2 ~5 x: B! O8 d5 ^# I& G; U* f
- g.setFont(font0);( t$ S9 z. N' R5 N! J! X
- let str = "晴纱是男娘";/ s# u6 Q, a z
- let ww = 400;
! r7 a7 A, b# i7 G3 p6 K& i - let w = getW(str, font0);
7 j6 }. x& x$ m I% X# g' l* F - g.drawString(str, ww / 2 - w / 2, 200);
' G) v Q% n& r3 ]% {( [* W. [ - }* @; k' Z% O8 Y: s9 C1 g5 k) F
- 5 B) M7 O- L7 s' v( |9 i# W; M7 ? q
- const mat = new Matrices();+ A5 i. A" w% o: @
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {! y; k+ m' Y" g7 U* C
- let info = {) g2 H: T) {3 n* P* @2 j
- ctx: ctx,
: N* r- Q( t- B- x% i - isTrain: false,0 Z* S/ p$ O. `- l# u% \
- matrices: [mat],+ x8 \: L' K: i/ V6 F
- texture: [400, 400],
$ c# w* F9 }6 L* z+ M - model: {
8 d& |& ^4 m) k* ~: l$ Z7 J( C - renderType: "light",5 C g# s) C$ H; M9 F
- size: [1, 1],
: R d! i v% {: S* A7 Z# X: C - uvSize: [1, 1]
* f1 W$ Q4 ~& B( t/ I* M - }
! Y) d8 L3 Y' w6 S - }
+ P% F7 ]5 M+ W% [+ g - let f = new Face(info);
U" B/ T" m5 ~1 Y( p - state.f = f;5 p! V/ J& d0 f1 G
- , Y& y" s: P1 e& [
- let t = f.texture;
# j- V8 T3 n" M1 g3 o% I& j0 p - let g = t.graphics;
2 `( {: p) K! v+ i+ @: L" s - state.running = true;
3 g3 I9 b$ S0 T6 q- _ - let fps = 24;8 i( u: Y9 W5 f- n: C7 G
- da(g);//绘制底图# y1 O, a1 @. J
- t.upload();
( x$ S* Q5 d8 k$ M9 H- X - let k = 0;
: _" r R F9 J' N- E( a1 G - let ti = Date.now();
; p: m& s% |" P$ T9 p* _ - let rt = 0;" x3 H, j6 D0 ?6 m0 g6 h
- smooth = (k, v) => {// 平滑变化
2 `5 o) E. ?1 i8 ~+ f9 d% @1 v( {) I. I - if (v > k) return k;9 T! j2 [% c5 i
- if (k < 0) return 0;( [* [/ Q; F* B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 B6 t- c' O5 F. V
- }( |3 h9 ~1 r# a
- run = () => {// 新线程1 D0 R# R$ j ?
- let id = Thread.currentThread().getId();
0 D! p) d6 v& ]3 |8 I2 u - print("Thread start:" + id);$ @. {- q" {- K; j# j. U$ e9 D
- while (state.running) {% w- @2 j4 M7 w G$ {* }, d- i
- try {
* Y, W) ^3 i" D% E0 b - k += (Date.now() - ti) / 1000 * 0.2;
+ m" O) B, R0 [ - ti = Date.now();5 p" {$ b' F& I* U+ i9 L% h
- if (k > 1.5) {
. N. s3 b m; H2 m0 f: O) s - k = 0;
' z) q7 b8 @- D* j) N2 q& M - }
# ~! {) H F" [" }. b. R - setComp(g, 1);$ i' [5 H! X8 k4 h% ?0 A
- da(g);
0 W% @: a: V9 u# _* _1 H& t - let kk = smooth(1, k);//平滑切换透明度5 a9 y4 U+ [$ V) }) o
- setComp(g, kk);% R3 O. p* w8 R( {) p9 G
- db(g);! x% v9 q% S: n6 a
- t.upload();$ _4 _4 F: f) Y3 U2 ?
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 t8 z/ x3 m' y: n( Z+ ? - ctx.setDebugInfo("k", k);
Y/ I7 {. W6 E! d; R+ u - ctx.setDebugInfo("sm", kk);! D' B" r4 ]: \! Z3 o% o
- rt = Date.now() - ti;
- h% V* ~1 ?3 ]$ `9 ^( t - Thread.sleep(ck(rt - 1000 / fps));
! |4 {' A* A9 K3 j8 w E7 G5 f - ctx.setDebugInfo("error", 0)
: s+ v8 |! d, G: ~( {1 ] - } catch (e) {2 O6 b8 ^0 Q3 f( T; }
- ctx.setDebugInfo("error", e);; A% b/ p- e3 i1 G
- }& E) j& N& u: _1 |* L7 ]. F
- }$ Z% Z+ I$ R ^. i, A. C
- print("Thread end:" + id);. n2 z& y) {+ ?
- }& B" O" r. a" ]! T8 M
- let th = new Thread(run, "qiehuan");" I1 r7 Z7 K+ q& x# M3 G: `
- th.start();
: {- I) e* a8 O; x - }/ H* {: i( v. r! G2 ~8 ]
- . N8 v0 J6 j0 L6 i
- function render(ctx, state, entity) {
4 _" y8 O& `. `! X - state.f.tick();
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- # D/ f4 Q' e: j( y) o
- function dispose(ctx, state, entity) {( _0 A: x- \" @2 ^
- print("Dispose");
# ]3 F0 u5 a( r - state.running = false;" @4 d$ S# {7 S9 h" E
- state.f.close();
9 f x/ r p& H: a( A: _ - }; U' Y2 s# v' |- ?6 F% g2 `
* p) b3 F) w W3 T( M' g- function setComp(g, value) {
l1 w, |$ V6 U5 b - g.setComposite(AlphaComposite.SrcOver.derive(value));; y) _+ l4 ]2 c, y/ f% f
- }
复制代码
! o; r: G/ `. }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). R8 g Z. ^2 T; A4 ~0 g4 v7 C( W
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