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# H8 i) H9 ^& I$ s, S6 v
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。
# q( o& m0 R- c- D4 D- importPackage (java.lang);6 [0 [5 y/ p; Z$ h
- importPackage (java.awt);3 ]$ _7 _" L6 W, S5 x% E0 u8 O# @3 |& B
- ! l1 a) Z$ H' P/ B* B- i! z! A
- include(Resources.id("mtrsteamloco:library/code/face.js"));! F5 S) h; U6 [- E$ x" T
6 ?( N0 w4 f2 E! }, _ V) n7 E- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# e% J! u+ r4 ?$ R
x4 a! `% c; ^- function getW(str, font) {
$ B. Y5 |' |6 G( d, }- } - let frc = Resources.getFontRenderContext();
' f( Y/ P& A; e' Y1 T' D0 g; {% [* m - bounds = font.getStringBounds(str, frc);
& \0 t: e, A0 C& ?: h - return Math.ceil(bounds.getWidth());+ L; x R: W3 w" i. I2 s6 }
- } H8 n W+ a" b+ k. t' ?3 l
- * z2 t4 `6 `$ b, `$ j
- da = (g) => {//底图绘制
7 @6 ], ]- K: P) P: l" z - g.setColor(Color.BLACK);
9 G( T7 `" `( h2 F8 Z4 d& g9 e: T9 t+ Q - g.fillRect(0, 0, 400, 400);
1 i9 @, q; ^7 T# b& A$ x - }
/ T) p) ` l+ E) A# d1 K8 O - 0 s. {& _4 [( E
- db = (g) => {//上层绘制
% y; v5 y% p4 V$ [/ P - g.setColor(Color.WHITE);0 u/ Z1 s$ i3 v- p' C
- g.fillRect(0, 0, 400, 400);: F v+ O: M+ \, N1 h; h9 f1 e
- g.setColor(Color.RED);: j6 m4 g5 F8 w* G% ]/ W1 g
- g.setFont(font0);
. ]/ F6 w1 L+ x+ I/ |+ M8 c- ]3 j - let str = "晴纱是男娘";
- e. n* O2 p3 B% C" o& n% ] - let ww = 400;
2 _, V( C# a) p7 o - let w = getW(str, font0);
8 c/ c# k) i. b: _5 \; e* [ - g.drawString(str, ww / 2 - w / 2, 200);
3 n( P0 R( i' X, N - }, \4 G/ o4 d! s
. C3 ^/ M. I6 s: R- const mat = new Matrices();
7 X3 [: _+ }- t! @ - mat.translate(0, 0.5, 0);
4 T# ]3 n4 a3 s9 Q5 q. J; i' {5 s - " a9 j! [% F- m$ R& V9 Z
- function create(ctx, state, entity) {
$ s2 O1 o/ `0 K, F - let info = {7 o& _& ~- f! X
- ctx: ctx,
1 q* f- P4 V9 S - isTrain: false,3 V% E$ k" J8 d) L- j$ p% a" s
- matrices: [mat],, R/ A1 x ^2 z
- texture: [400, 400],
; k3 v8 ?! t0 o; v - model: {
- K8 X& Q# p( I1 e. {, P9 `5 r - renderType: "light",
4 L. z2 G; ?( q D8 t% X - size: [1, 1],5 B& s% c3 [0 E, V
- uvSize: [1, 1]# S5 n( N! ~4 |: ~4 M0 L, B
- }
: {+ T0 @# g+ \/ ~/ r. @ - }5 `8 [1 [, l5 H
- let f = new Face(info);
: b; w4 b2 U; |1 F1 D5 ?5 J% A( T; I( R4 M - state.f = f;
% X2 f/ _' A- G
, u. Q# [" Y' y- let t = f.texture;" U) h4 \' m% k( `* b
- let g = t.graphics;9 U* ~* H/ D; w, l
- state.running = true;+ ^ [- M' ^# c( f5 M8 @" @0 n2 K
- let fps = 24;6 K' ^8 X7 Q, x
- da(g);//绘制底图
: ^# u1 a0 U( y7 U9 M% m/ x2 A - t.upload();
]/ P* B& m O5 O9 p6 B - let k = 0;
# `0 o! E, e# I) [ - let ti = Date.now();
/ V* v( j" o4 k7 f - let rt = 0;
. Z' Z6 N5 D& P$ g' x9 Q - smooth = (k, v) => {// 平滑变化- |( e( ]8 d/ k( F; y6 l5 [
- if (v > k) return k;9 x/ q0 k) @* G) {9 F
- if (k < 0) return 0;
$ r) M4 E, K) g8 F6 W8 g/ v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 U0 Z1 `/ q' l8 B0 M$ ^3 e - }# E0 S: r. Z2 [* y4 @7 @; h& z
- run = () => {// 新线程6 A' v+ S* A0 O, r
- let id = Thread.currentThread().getId();
; w' A! m8 E# u' I2 o - print("Thread start:" + id);5 X3 K" I5 [, k, z+ `" V1 ~
- while (state.running) {
" p7 h+ P u5 Y1 Y - try {) f% ?! @% d% A1 z* B
- k += (Date.now() - ti) / 1000 * 0.2;
& C! m7 d1 |5 n7 h# u$ C8 y - ti = Date.now();
! g3 `- u# ^! ] - if (k > 1.5) {
" i# N& g7 R4 {! b8 P - k = 0; \8 O: B0 w) p2 p* Q/ N
- }
7 H9 ~ L2 k. e6 J, z w. P - setComp(g, 1);
, _$ y4 k) c" N" N1 M - da(g);8 `; R6 y3 V' A
- let kk = smooth(1, k);//平滑切换透明度+ m1 ^/ |% @- ^4 l) i8 @
- setComp(g, kk);3 e& ]6 @* {1 _6 E2 v
- db(g);! W: \9 g% P0 U: M+ W0 H( A6 m) l
- t.upload();
8 G+ n7 e+ S$ Q- Y4 {3 k - ctx.setDebugInfo("rt" ,Date.now() - ti);5 f8 }" ?: Z- C9 A+ G* [+ H
- ctx.setDebugInfo("k", k);
* ?8 ?8 }6 s0 S% f; Y - ctx.setDebugInfo("sm", kk);
' ?# S4 }) I8 y! D - rt = Date.now() - ti;
' _5 _4 W4 y8 o. A2 S! r3 H* e - Thread.sleep(ck(rt - 1000 / fps));; I9 L1 Z4 _- {& C
- ctx.setDebugInfo("error", 0)1 P9 c) @! g' ?7 y: j
- } catch (e) {* a) S( ^" o# P$ `1 y- J4 q6 X& B
- ctx.setDebugInfo("error", e); |4 N4 u' Z/ o5 ]$ B5 [
- }
& E3 _& M8 y/ y1 b - }
8 R% y6 s9 a# q P; M; n c9 o- a - print("Thread end:" + id);1 d3 d: h) a8 P4 H1 y
- }
8 _1 {% Y" @3 V% S3 [. k - let th = new Thread(run, "qiehuan");
: i1 ]) b; e( B: M. O# L( v% u - th.start();5 D5 V3 \6 ]& P& n
- }8 v9 A7 ~% e, j$ |
- : @( l0 a! w' Z7 y" D
- function render(ctx, state, entity) {
: U" I3 A5 w: l - state.f.tick(); G$ b# @5 K- P1 G4 y: ^
- }9 B5 L. K: C1 e9 j, ^
1 D4 [" H/ Z* P- g- function dispose(ctx, state, entity) {
# F: g9 Y, J# E `5 ` - print("Dispose");0 ?; T' S8 G" K* ^! F* O! f- J" `: h
- state.running = false;
% r" V1 }1 x. P' ?5 \! g- I& i - state.f.close();/ o3 U' V2 V, a/ C j9 V
- }- T3 I/ x3 v I/ K C5 i! k' O
k) y) `/ h' \- function setComp(g, value) {
7 t) H' |" {5 V% C2 E( F - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 z: O/ y) y. j - }
复制代码 1 }: ^/ p, r' w; 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。4 E2 k- \: d% x" q* | d
! A3 ^. v& C! ^
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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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