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( @" T% e- I, U3 f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。' u3 k* d7 i, A& G, p3 E% e
- importPackage (java.lang);6 G4 h" {, D8 f; J
- importPackage (java.awt);
4 F [$ }+ y) Y2 c+ h H" c0 a
3 M& d* e' @2 z/ F& j: D @- include(Resources.id("mtrsteamloco:library/code/face.js"));4 L8 o7 s6 v+ Q8 h& ]' X! Z
: ~, p. k7 v; M, u- o+ u: q- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 }8 c# U& m5 _
' R2 Z e2 q% ~: n3 g/ Q: V) }- function getW(str, font) {# @. v. J J, k
- let frc = Resources.getFontRenderContext();
P# o/ J2 E2 j5 C5 H! x - bounds = font.getStringBounds(str, frc);
' M# l* E. E7 ~% r& o/ v - return Math.ceil(bounds.getWidth());( b: B! J, A; m `: c- v
- }+ [) a& ^( s: j v: S# d9 ?3 n
8 Q2 g; h8 d- `2 ~3 b2 ] }$ f- da = (g) => {//底图绘制! \) I9 e, y$ h- Y9 p
- g.setColor(Color.BLACK);
" O( U! X( m# J& \* `9 d - g.fillRect(0, 0, 400, 400);
F4 n! B1 U0 s# x - }
& k K% s5 Q0 e, R% T8 d. F1 } - % F; p4 k4 D: I3 K$ T9 _
- db = (g) => {//上层绘制
- ]% A0 S0 u, X - g.setColor(Color.WHITE);
! A) D2 r# p- b k* m" a - g.fillRect(0, 0, 400, 400);
8 l; k0 Y" E* T* w7 c' [ - g.setColor(Color.RED);7 b! }2 u% Y" y9 p g& N
- g.setFont(font0);& w: X$ F+ r1 A0 Q
- let str = "晴纱是男娘";7 U0 H, r7 n. }! v! u5 _2 v; u
- let ww = 400;
5 w. e5 F* s; j1 L5 H! v% k - let w = getW(str, font0);. D5 A& ~6 A$ U# M$ F0 z/ \! X! \2 ?5 B
- g.drawString(str, ww / 2 - w / 2, 200);. }! F5 H# Y4 ^" Z% y' Z
- }
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* g/ s, j9 |. }2 S) @- const mat = new Matrices();
p' G& H; A! [* U6 d% ]' n! Z - mat.translate(0, 0.5, 0);0 R7 Y, c, |7 m
- - R! K0 l9 ` T8 t& e& c5 V
- function create(ctx, state, entity) {
( G0 y! g( B) I - let info = {5 G* V- C1 b. ], b
- ctx: ctx,
j% c& A5 H% n. \+ U# G - isTrain: false,
- f) q% C( {+ u K' G - matrices: [mat],5 b! y5 q J0 d
- texture: [400, 400],
3 @6 j/ | c! Y( h - model: {
$ T0 w' Y4 E1 A g - renderType: "light",
, _4 V0 j7 e, @* k - size: [1, 1],( E' h% b2 J" s/ L& r! }
- uvSize: [1, 1]
- C6 l) P7 {, l. U, @ - }; U- `/ r; c& f, K! l
- }1 `- w2 Q9 E8 v0 E/ ~/ B; M
- let f = new Face(info);% ^" i. |5 _/ p% \+ c
- state.f = f;
: d# e2 I# j: d i
1 t, Y u. V+ _- let t = f.texture;
8 c. k) s: U! l' e- d7 Y% J" N - let g = t.graphics;% [/ t; A+ P2 f
- state.running = true;
/ j2 y$ u) }" b6 L/ y - let fps = 24;
6 f1 @( D+ h- r9 w; b7 b - da(g);//绘制底图- ~- D+ W/ M1 V r8 ?) X
- t.upload();/ j# h) V9 {3 T4 e/ e
- let k = 0;
, Y, v7 R) G: _ k, m9 K" J1 u - let ti = Date.now();% l8 m8 l6 W2 k) K) g; O8 T- I
- let rt = 0;: o. |4 P. L, U7 u; p# J
- smooth = (k, v) => {// 平滑变化
9 @$ p2 z4 s1 v" ?& o - if (v > k) return k;
9 Y. x2 C( c4 u6 A7 I& a - if (k < 0) return 0;
5 P5 I) b) L# g) d5 K+ y- K$ j - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ c+ A: \' J; j - }) d8 j8 l# u4 n6 u
- run = () => {// 新线程3 z/ `$ P- ?. P2 I& E3 ^' h9 v5 `; G, x
- let id = Thread.currentThread().getId();) `% W9 z. j5 v5 r- h
- print("Thread start:" + id);! [5 t: J( s" E- I7 o p& H
- while (state.running) {$ ]( j# q- l; w4 U
- try {
" @1 I& x! r% q - k += (Date.now() - ti) / 1000 * 0.2;
; Y) S9 Q; P2 q! q$ [, N/ u; w9 C - ti = Date.now();- X7 \/ d& j3 b. L+ D: z
- if (k > 1.5) {2 ?' \) k* G6 o; Y3 j
- k = 0;/ l `% {8 s; V
- }
6 I9 F6 r( k( _/ i$ u - setComp(g, 1);
$ I& s! M' O- T$ L+ | - da(g);/ C8 x9 [% Q4 S5 j3 i
- let kk = smooth(1, k);//平滑切换透明度
9 k5 J; E% ]5 |7 A9 z) R - setComp(g, kk);
; I- o4 q/ R! Q+ n# s9 j# y+ g - db(g);
j3 J! G, w: ]* p! p( Q - t.upload();
9 v$ X+ u- F& F - ctx.setDebugInfo("rt" ,Date.now() - ti);' U9 h2 ]* n/ j: Q
- ctx.setDebugInfo("k", k);% f# B4 q, ^1 S, C
- ctx.setDebugInfo("sm", kk);2 B4 f5 M" Z! `( v
- rt = Date.now() - ti;0 C0 g/ p) f9 [- q
- Thread.sleep(ck(rt - 1000 / fps));$ {- h7 {9 c5 ~" m5 U
- ctx.setDebugInfo("error", 0)) V6 U) W1 U* T, A: ~% S" L
- } catch (e) {5 G8 k* x! _6 i3 U; D
- ctx.setDebugInfo("error", e);
1 q Q( F8 y, x - }
" K" B# m7 f0 J4 Y$ u - }! C" _5 |0 ^. x8 \$ B* C* D# L
- print("Thread end:" + id);* \6 p5 f' |% L1 H
- }7 K: G3 l. o0 v1 d
- let th = new Thread(run, "qiehuan");
4 g* d) P( B8 f [- }1 Z7 e! \) O - th.start();* Z+ g! D& g( v2 J% Z
- }
+ ^! @) [+ H9 Q$ t - 9 ^4 Q# Y4 v; [1 _
- function render(ctx, state, entity) {
& v$ T; W# V/ D5 v# _ - state.f.tick();9 J: Y4 s& G- M
- }
! k- E. b/ Q/ i6 L- t" ?' R7 A, _ - % D0 f, Q o: ~
- function dispose(ctx, state, entity) {
5 z( J# y$ d) ~) \ - print("Dispose");5 k7 I) t; A. p" m3 }7 o9 `& k# K
- state.running = false;" P) r" w9 X/ m
- state.f.close();
( [- `3 H3 B( i5 {0 C4 r( Y - }
/ c/ g2 }6 i$ S a3 @3 h
5 w6 J. P$ j1 \( p7 Z ]- function setComp(g, value) {
$ C* B9 ]5 X* o# v, ^) E - g.setComposite(AlphaComposite.SrcOver.derive(value));" @/ n8 u1 V0 x& @ j, i* m0 i- Q
- }
复制代码
! k' W. M( i% c( W7 I5 D. E: w# 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。' \& _8 d) z! `+ Z [
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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). I: X- ^' p9 n% K8 L6 a
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