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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。
1 C$ h1 y1 Q L. w/ U- importPackage (java.lang);
( w8 W7 G; R6 @) J2 I - importPackage (java.awt);. J) e# C! o5 A$ t1 P
& F; d3 k7 w5 ~ X- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ W# O" m- B, \* w9 I2 y+ e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 A' R) b% w# a
- 0 v7 ?. H/ x- [8 x0 c# [, h6 }
- function getW(str, font) {
9 ~7 g6 u# g! `' Z - let frc = Resources.getFontRenderContext();
& M7 K) l8 T9 a+ x1 f& H - bounds = font.getStringBounds(str, frc);
* m5 x" y' H s+ B8 A0 A9 D - return Math.ceil(bounds.getWidth());
1 n; N! n( n' {% ^1 ?+ `) } - }
- T0 k" ~: F$ Y. g$ Q* O/ C
3 k8 P6 j' x- S1 \- da = (g) => {//底图绘制) ?6 F( c. [' O4 e. Q+ z
- g.setColor(Color.BLACK);. M* ]7 F f) O/ X" [
- g.fillRect(0, 0, 400, 400);
3 s- ~9 ?5 Q, x0 s1 | - }
* f1 [* M8 o1 B+ v& t
. D! K8 E2 X, h- db = (g) => {//上层绘制% L7 p! [: l/ v" N. r
- g.setColor(Color.WHITE);
0 X0 V) {7 }9 M7 k+ w" Z2 \ - g.fillRect(0, 0, 400, 400);5 [) w. g+ u- s: r- i
- g.setColor(Color.RED);* c$ M5 d/ w* B! }7 P0 O, M
- g.setFont(font0);1 `1 g/ Z3 j: K) k! _6 G! U
- let str = "晴纱是男娘";0 v9 D) e" t/ `
- let ww = 400;6 X2 J7 Y$ x/ V4 j6 J
- let w = getW(str, font0);' c, }& ^: z. |+ D3 G6 {* e
- g.drawString(str, ww / 2 - w / 2, 200);
a/ ?4 z# X( Z* | - }
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- const mat = new Matrices();( y* G7 F1 O! y( T$ {5 i& m3 j
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
, T7 L6 F/ H. O( x* M7 [, B9 B - let info = {6 F0 `& w( a* ~' `0 W) X
- ctx: ctx,! J2 r" S5 \) \! M4 |8 h0 H
- isTrain: false,
) A& { `! r8 A3 q! B9 M3 r - matrices: [mat],
' _& E5 D$ Z( O. n - texture: [400, 400],
% s+ w6 d+ l/ { - model: {
6 Y$ m2 {8 e4 ^ K% A - renderType: "light",8 b% c+ e. J ^2 v" n
- size: [1, 1],: W# U, C2 p. y& ]8 R6 y
- uvSize: [1, 1]
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- }/ p* ]6 j) _2 N/ H$ ~8 _/ b/ Z& h
- let f = new Face(info);& @. o% F$ n6 S% t c; a
- state.f = f;
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+ N( Y i! u% j! Z' L: P' [: H) b8 S- let t = f.texture;
1 R. {8 m7 u& }6 K; A - let g = t.graphics;
: d/ B$ Q9 T( |( { - state.running = true;/ v5 y# k- ^( \% _& }- \/ w3 ^9 h
- let fps = 24;
3 P3 q6 M1 _+ m4 Y- g, t - da(g);//绘制底图
& p' |0 }1 b* n5 u/ e: j% q8 _( w - t.upload();$ `: h; F; U$ U1 R% C' L) o% |
- let k = 0;
5 u% Q8 }. l' Q+ U: J6 V! K8 U' K - let ti = Date.now();. H2 g& f8 o9 U8 D( j: b3 L
- let rt = 0;
# L" S+ ?) ^3 f' C4 Q. { - smooth = (k, v) => {// 平滑变化
% T' b* D" e- w5 D - if (v > k) return k;9 d( \7 d o ^4 f
- if (k < 0) return 0;
; Y/ K* I: r8 [, [, [ a3 X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ x; _! c# j$ N% V5 O+ `
- }1 X0 C$ z8 l7 R% P( X% V
- run = () => {// 新线程# z# }- w/ G( |) w( T+ M" {
- let id = Thread.currentThread().getId();# c1 I( j, D( k% J
- print("Thread start:" + id);% [0 K4 ]( t: s% S& e
- while (state.running) {3 p" B( O8 x8 k/ L
- try {- ^: L1 Z0 _' w$ }& ]
- k += (Date.now() - ti) / 1000 * 0.2;6 @* P$ v4 q7 k
- ti = Date.now();: m0 U9 r H+ x* m: @) p
- if (k > 1.5) {
Z' d( C: w" D |( Z9 V - k = 0;
5 l, {* e$ T* a - }
. V T+ m2 j) X2 K# a/ A - setComp(g, 1);
* R5 f0 l; H& k" g+ `: C3 ~- J - da(g);* K; D4 n$ b6 M
- let kk = smooth(1, k);//平滑切换透明度2 t& x" E% N+ N- B o
- setComp(g, kk);
. J2 Y) [$ X, T& v/ ] - db(g);
@. y" t/ Z! E - t.upload();
5 G* B+ `/ ^* x4 h. H5 x: E - ctx.setDebugInfo("rt" ,Date.now() - ti);
. Z- f+ E: E4 y w - ctx.setDebugInfo("k", k);/ W3 A3 f1 J/ G
- ctx.setDebugInfo("sm", kk);: l" H0 L3 W: C9 E' u8 ^
- rt = Date.now() - ti;: @! L# K! {, l, v( u6 M. W
- Thread.sleep(ck(rt - 1000 / fps));
3 L) a' S5 D7 w2 g3 K8 p - ctx.setDebugInfo("error", 0)
/ |9 s$ Q2 A6 d. k" L( t; A - } catch (e) {& m# b. }$ u+ O+ T+ ]6 ^1 a
- ctx.setDebugInfo("error", e);* `8 f* }5 L7 V
- }
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- print("Thread end:" + id);' n. ^; V! {: s0 |
- }
& D" S& O2 v) a, f - let th = new Thread(run, "qiehuan");" n) m: n8 q9 _* ?! m
- th.start();0 X. ]7 S1 X# B2 n5 f4 Q
- }
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- function render(ctx, state, entity) {
. u+ F5 N* E! [3 W% u* s: Y - state.f.tick();' Q) s- a9 w5 }' {5 X
- }1 {) F& h& Y* T* |4 i
% C+ c0 y) W2 M- c+ m% V- function dispose(ctx, state, entity) {/ }5 a4 `( O. K. o1 E9 ]
- print("Dispose");% T) i( O" n9 k
- state.running = false;
P( p9 s1 Y- u1 N* N - state.f.close();( f1 P1 X; X& i7 _- Y8 a
- }
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# c2 q" E: g0 q$ L8 V- function setComp(g, value) {. Z, {, n. D1 r( b7 E2 o
- g.setComposite(AlphaComposite.SrcOver.derive(value));2 s2 H' b ]8 T
- }
复制代码
/ w* v& P9 u1 g8 ?: ]: Z7 K% y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 I5 A \% x4 `0 O' B
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1 E$ w( w) S6 m$ u8 Z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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