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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。+ }. i/ O7 O2 }& @# J
- importPackage (java.lang);. L' }9 Q; O( f) w% a
- importPackage (java.awt);
+ R' P( E; j8 Q d - : E+ p& c3 }) t3 {- R+ Q* B
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# k$ ?1 q$ e# c3 l7 J9 v5 f* D/ h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
$ i9 p8 ~: y+ q+ @% ^
5 ~, k' \5 e4 D& S( }3 S m- function getW(str, font) {% b; ~- r1 ] R" g: }" t2 z
- let frc = Resources.getFontRenderContext();
/ i+ e9 d1 W6 Q# }- E* K2 i - bounds = font.getStringBounds(str, frc);
" C9 m9 B8 n& B7 L0 ~9 w$ J) h - return Math.ceil(bounds.getWidth());
* U- l. l& o: J. |. W - }& v) S2 ~ f9 _4 B+ i
" A0 f- [2 ^ B- |& r D9 h) a+ n- da = (g) => {//底图绘制# J1 O4 Y- z1 W- f
- g.setColor(Color.BLACK);
^6 q3 e: x% l W - g.fillRect(0, 0, 400, 400);
) Q1 O: B1 G" D- a& Q6 s g - }
& ~) r" E) o: Y6 i9 ^
3 E. Z7 n% L+ ? \9 r c( C, L0 G- db = (g) => {//上层绘制/ K- K' C Q$ Y
- g.setColor(Color.WHITE);
% i) @8 r1 C* X2 P- u - g.fillRect(0, 0, 400, 400);% R1 G+ l T0 v+ Y3 m3 w4 |
- g.setColor(Color.RED);
3 H' j, b$ A w6 {1 C" u& ?* U - g.setFont(font0);
, l# d$ J1 S% ?- i2 ^; u - let str = "晴纱是男娘";
) }9 q2 P; s) d9 D- a t - let ww = 400;
9 B% v1 O6 r3 ^7 t$ _+ \7 `" B - let w = getW(str, font0);
* \. a: K" M( H# | - g.drawString(str, ww / 2 - w / 2, 200);
9 m; j: d# [# d' [ - }
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2 L: T" s; X! P, A- const mat = new Matrices();" K5 w3 p" @4 I* d
- mat.translate(0, 0.5, 0);5 |' R7 \! I& R. u* x- C
' f0 a5 s/ [/ R; ]9 c# m5 u- function create(ctx, state, entity) {
" ^7 J. v" D6 O) o - let info = {
- T% ~7 V" x5 f y! R) A2 C+ m - ctx: ctx,
) D- U$ |4 I4 O% \ - isTrain: false,- H @- s. R6 c) A2 [6 k( z
- matrices: [mat],
3 F( I( U2 f7 }$ Y* ~ - texture: [400, 400],, I2 C) [0 {/ u1 F
- model: {
: B3 o$ C( m, A/ x: D, X - renderType: "light",
$ u. {# Z. v3 A9 u - size: [1, 1],
- G) w$ a) F. Q5 i- N/ }9 o6 v - uvSize: [1, 1]
, ^' p. g8 q& Q - }
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- let f = new Face(info);& C8 t9 }3 A S
- state.f = f;
% J# E" h, g' ^ - ; y5 G9 `2 U7 g' e* S! O$ y1 j! b
- let t = f.texture;& U$ u5 R# ^; G8 G5 J8 C
- let g = t.graphics;
$ ?3 X/ ^: `" p- v( T - state.running = true;; U# [" L: r1 D
- let fps = 24;
. n: S% r% C& _ g I/ z - da(g);//绘制底图
8 S( I1 y5 }6 M0 U - t.upload();
, @ N+ M( q' J3 L4 [- I. M - let k = 0;, L6 k+ c( f3 S: v
- let ti = Date.now();' Z$ j; @% B( U: b
- let rt = 0;
. C3 e5 A6 T! I$ T. X4 d) \" W - smooth = (k, v) => {// 平滑变化
8 S8 Y# b' B3 {! \' q - if (v > k) return k;1 w( V2 C/ ~ I# l, N' S. O
- if (k < 0) return 0;! Y h' b4 e( M+ c) P$ [
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 b R" k' H8 p6 Z, Y9 p2 ^
- }
( S( w% e. p4 ?% j8 g) g/ ~) ] - run = () => {// 新线程
5 d- y6 h, w$ Y* H8 V8 Z2 N - let id = Thread.currentThread().getId();
+ a( A) D2 Z( w- T - print("Thread start:" + id);
3 N/ R! x# B( k6 y - while (state.running) {) q+ K) n! ]. K7 w( h9 w" A
- try {
% Q" o0 e! c, n8 g& p - k += (Date.now() - ti) / 1000 * 0.2;5 R/ d ~3 i2 J G9 C$ m8 f; t
- ti = Date.now();- ?# z( k% A, f+ }, d3 j; v" a+ }2 z
- if (k > 1.5) {
* F: [9 S$ v0 j" z: V5 I - k = 0;
I) d: S- @4 z) G - }
* Y2 _; ?! w0 I - setComp(g, 1);! R- W, L8 A0 ]& h% y0 U
- da(g);
! V1 O% w z/ E. t+ @ - let kk = smooth(1, k);//平滑切换透明度
' @6 ]. X5 s+ W* I: |$ c - setComp(g, kk);
o+ ]6 X' u1 z. ?9 ~ - db(g);* c1 P9 S4 h5 v5 Q$ M! @4 O
- t.upload();
9 B+ A4 N! \, B8 f! M$ O0 c# Y - ctx.setDebugInfo("rt" ,Date.now() - ti);) e) ^& W+ m+ w
- ctx.setDebugInfo("k", k);
' ^+ x3 @. h' p) J5 ]% \0 S9 [' T - ctx.setDebugInfo("sm", kk);$ ]& L. B' j# }
- rt = Date.now() - ti;( b& A+ p4 v' `& S. ~/ e/ W
- Thread.sleep(ck(rt - 1000 / fps));1 d3 w* e# @. d7 L3 P
- ctx.setDebugInfo("error", 0)
1 H9 K+ a! c: m4 _ - } catch (e) {
1 z- @6 T9 V! v" V4 ~ - ctx.setDebugInfo("error", e);' `5 k0 Q/ G' I! N% R r6 l7 k
- }
, V- H) n% w. |8 v; l+ e( y- [ P, h - }
8 S! M2 B1 D; P9 x! _0 i - print("Thread end:" + id);! v1 g% g( O( z& i; m* e( s
- }
& m* |$ o- b9 H- f8 a( g9 y2 C' U) P - let th = new Thread(run, "qiehuan");6 ~0 I: N5 N$ X. I9 D
- th.start();
4 N+ h( w3 a) Y, j0 p& `7 P - }7 F, N+ W; m6 x9 q) b7 I1 n
- & d- e- L& ~. J% `+ h8 F' Z
- function render(ctx, state, entity) {6 K. s; b* B# Z% l% R1 `, Y
- state.f.tick();9 ^; i) R. g( ~- i3 c; q+ i
- }
& t9 r4 w* W1 _3 ]2 j8 Z9 O$ b
! ], Z/ v. z* w$ ]/ S0 Z- x- function dispose(ctx, state, entity) {
) }" r: Y& n: a' d! i2 z ^" _ - print("Dispose");6 {1 w" C) X, `' m8 @3 I, t
- state.running = false;. H! C% ~, \ x( B: T1 ]
- state.f.close();
" [) e7 ^" u. h) k& R1 L - }
) _! r6 ~; A7 e: s - 4 m. Y$ ]( N; S2 D! g. n/ }
- function setComp(g, value) {
3 y J9 c5 M- w% U# N* O! \+ `. { - g.setComposite(AlphaComposite.SrcOver.derive(value));' r, h5 s m1 D& z
- }
复制代码
% _' E9 W8 ]4 r9 r# }4 t x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 m5 u0 [ a: d4 M& Y5 j( t9 c; V
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+ z: S" O5 @ p; y顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)7 |" S/ Q' j4 H0 M4 n7 u- }' [
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