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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。
+ B1 v# U3 h8 L S. m; ]0 u y) B- importPackage (java.lang);3 ?8 I1 k1 x) |3 X$ Y! n
- importPackage (java.awt);1 s: n6 E7 s. r* K }5 N0 g
2 v) K9 p* ` P* E" Q, P- include(Resources.id("mtrsteamloco:library/code/face.js"));
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1 m4 @# b5 ~; n7 a1 ~* f- Z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# Y: i- z6 | i j
- ], \1 A* {3 S! W9 `# N+ c* }/ t- function getW(str, font) {
! r9 k8 ?# w( C/ T - let frc = Resources.getFontRenderContext();
' T" J$ }5 _& e2 }. n: A- p - bounds = font.getStringBounds(str, frc);" b/ E3 B( T4 E* [+ _1 A; `
- return Math.ceil(bounds.getWidth());
- h4 J" r- G8 I# v( l; @4 r( r - }9 C& w; y2 u7 h( x( x* N9 ^
- }2 K" g S4 l- E2 V# A( |: ]
- da = (g) => {//底图绘制
+ e2 m1 M5 m- l) q; n4 N; i& P' N - g.setColor(Color.BLACK);( s5 r( L, A) I( s5 C' [: ^
- g.fillRect(0, 0, 400, 400);; l0 I) x, u) s( ^
- }
3 r# ?0 l' K6 | k1 c5 u% I6 X, S I - 1 O3 n2 k* U$ Z0 w% ^, w
- db = (g) => {//上层绘制- s; y5 a9 s# ~5 J9 B! q0 b* Y
- g.setColor(Color.WHITE);
: h& Z, D' n0 w4 M2 q4 K2 N - g.fillRect(0, 0, 400, 400);( L( s* X5 k. Z! X7 F- A2 {! p
- g.setColor(Color.RED);* Z- j2 h2 y: |. e* K# ^: v
- g.setFont(font0);
) m4 f: E6 ?6 t5 F - let str = "晴纱是男娘";
. Z9 w3 _5 }' N1 k2 n - let ww = 400;, X. j/ x1 v5 ?) Z
- let w = getW(str, font0);8 @; q1 P0 Y9 ]# @) i0 d
- g.drawString(str, ww / 2 - w / 2, 200);4 n0 p" u2 Z0 u" l* j/ u
- } K' C" L) m w! d0 t* [( Q* H; c
- ! ~2 X7 L! w# p# P3 ^
- const mat = new Matrices();
6 n" }' d ]% x' y. n - mat.translate(0, 0.5, 0);
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, n9 K' F, \% @9 S P3 [( Y$ d- function create(ctx, state, entity) {4 g7 A: {# S0 n5 R( n- B
- let info = {, j! b$ _$ m( t- V
- ctx: ctx,5 c: J+ b) t: D, R# [
- isTrain: false,% S! _7 d1 ~2 N/ Y+ [
- matrices: [mat],
+ Y9 h+ E9 C& G - texture: [400, 400]," Z! ^" G- Y# Q9 @# w
- model: {3 z& d+ T, d3 `( b9 s+ d8 o; o
- renderType: "light",
, E3 F7 W4 O% { - size: [1, 1], m' ^" g1 @8 e- x
- uvSize: [1, 1]6 F% {, U1 V. P+ { X# U
- }
9 g" I) d2 o) [ @2 w - }
/ F9 Q: o4 h5 f+ \ - let f = new Face(info);
0 \- {6 S8 D8 M' K- U4 I) |6 v - state.f = f;
/ s" F3 p8 O- E6 z! O7 y. w) T - 6 @$ H1 B; ?' U* j
- let t = f.texture;
* O v& T m: J6 T7 @+ R - let g = t.graphics;
, i! J- _. j8 @# ~( u) {& T - state.running = true;
$ F4 {3 Y9 E7 @* x, G9 g4 n* h - let fps = 24;. q0 l* z& c9 r- W N2 j& x N1 B7 n
- da(g);//绘制底图
( ~& K3 Q' m& y; X - t.upload(); E4 D# \/ B6 l* t* j
- let k = 0;
: S" w. m3 b" `1 ] b - let ti = Date.now();
5 S0 v L# p! C( Z/ C; T- D$ X - let rt = 0;
6 J* L1 q) f$ ]. D9 W - smooth = (k, v) => {// 平滑变化3 v6 X6 r, @$ a( t
- if (v > k) return k;
( ^1 E% e8 k7 M! u. Q& u5 G - if (k < 0) return 0;4 p S$ m2 z& I, W( Z7 I
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 e e. W9 W. f2 @$ G3 s$ E
- }5 Z6 O+ v, }7 h# s2 c
- run = () => {// 新线程! f: n7 Z% p" J/ [0 Z
- let id = Thread.currentThread().getId();
0 f2 [4 d% |* q3 z7 ^% n3 d - print("Thread start:" + id);
/ |% J, D: L; }1 l5 F& O% V* z$ n - while (state.running) {
+ m9 j+ I3 `* O4 }6 u - try { G( L# [. `7 i* l- C! a* J g/ }
- k += (Date.now() - ti) / 1000 * 0.2;
/ l- Q* O1 ]" h( s' u - ti = Date.now();( l6 r* k) m0 \& r' N2 `
- if (k > 1.5) {
9 ]! U A$ W4 y* ?. T* n - k = 0;
/ J$ d- S o6 T, G% Z" \7 @* C' z# ? - }
* }4 c( e8 L0 I- b0 c - setComp(g, 1);' d. Y: t) W6 o" R
- da(g);
& D3 A( E0 N8 y0 J% { - let kk = smooth(1, k);//平滑切换透明度
1 [2 v7 t" K5 K) Q( I" t - setComp(g, kk);9 X3 P; {% }" w0 j& _' H9 T
- db(g);4 z& h- \8 j9 K3 W- Y" }# u3 Z! h% w
- t.upload();
' g# Z) F2 \3 S: W0 d, ^9 t - ctx.setDebugInfo("rt" ,Date.now() - ti);, ]( d6 Z' \' @- L* p
- ctx.setDebugInfo("k", k);
3 O) T0 o! K( l" }; r# X7 X( b - ctx.setDebugInfo("sm", kk);
( H/ ?5 v6 q( f/ I' @ - rt = Date.now() - ti;
# G4 g. Q% ?: f: [1 g) l: ~5 k2 _ - Thread.sleep(ck(rt - 1000 / fps));
* T3 Q$ U" A# z# G - ctx.setDebugInfo("error", 0)8 I- L. B$ C! k8 ?9 A
- } catch (e) {
4 s3 \# c& a& y3 }5 q$ f5 p5 v z - ctx.setDebugInfo("error", e);, ~+ B( U# J) K4 i# h0 s
- }
5 T+ J9 _" V, } - }$ Y _" p e5 ^0 o6 h
- print("Thread end:" + id);
) k! x$ J8 O% D! r- W - }
4 L3 ~4 H7 |$ n5 | - let th = new Thread(run, "qiehuan");
( I2 ~* U) C5 O2 q - th.start();$ Z% ]- e) m4 k' z# P
- }5 {' ]2 v3 u5 F; Q+ u7 D8 i1 x( [
- ! c8 F' j2 C$ n. @! i9 Z Z9 z
- function render(ctx, state, entity) {( k7 {4 I" ~% c6 V2 h6 F7 Z9 n
- state.f.tick();$ l7 W( M- A7 h, j4 l5 u
- }7 |; z0 L& H. T( Y
2 y0 c2 f% A3 ?4 g8 S# z- function dispose(ctx, state, entity) {
' X, W' [7 {; R8 N/ m" S6 y6 m4 T - print("Dispose");
, e+ b' a1 ^# n: a- q: A0 {$ |* F - state.running = false;
/ c8 z5 l/ x& } - state.f.close();
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- & X1 Y- ~. T3 v- A4 a/ Y3 Z( W+ ]( G, Y
- function setComp(g, value) {( w$ X& E) f( N/ w' q. k
- g.setComposite(AlphaComposite.SrcOver.derive(value));
& M2 X: u* m! A3 i8 I - }
复制代码 4 o( ?! T1 H6 o5 i
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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: y8 f2 E3 b" ~* W$ B+ }顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): \# g) ~- Q, y
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