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& j! A/ w/ y+ I4 j) 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。3 a/ c$ K. K! K) J6 |- z
- importPackage (java.lang);
2 c9 {0 y/ q; f - importPackage (java.awt);& I1 r3 N8 G% I: J- g
, [6 t0 e# n: u4 U" |* W- include(Resources.id("mtrsteamloco:library/code/face.js"));5 O% c# i2 B, v6 d7 P& K7 A
- 7 l- i5 \1 N* t% u: X5 E1 p9 F
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 L, I# j& k4 |! O. {6 {
- y) i; Y8 \$ S, c: S% \! \- function getW(str, font) {
# Q6 Y* ?! @9 \ - let frc = Resources.getFontRenderContext();
; o6 E2 B4 f, C* `+ |7 w - bounds = font.getStringBounds(str, frc);( t. }/ D# [; F# y. { c8 v, L
- return Math.ceil(bounds.getWidth());* e# E1 w) A6 J2 e# l
- }% U U# b, |1 | b
) s, v- L; O8 c- da = (g) => {//底图绘制, `& w5 g$ a5 h5 o2 |, J9 d
- g.setColor(Color.BLACK);$ W4 _& w% i6 ]# g# r7 x
- g.fillRect(0, 0, 400, 400);- h8 q$ J5 O4 F. ?- Q
- }3 F* F( J3 ?- M/ U# t
) [3 P& R0 j% S* z: x3 ]- db = (g) => {//上层绘制
! C0 N$ t+ u' ^ `. I - g.setColor(Color.WHITE);
5 P$ ^! C0 Y' a7 g# U+ D - g.fillRect(0, 0, 400, 400);9 ]7 f3 ]$ [4 m8 n! }4 x6 b$ A
- g.setColor(Color.RED);7 V4 L+ z: w" ]6 x$ d* z6 s
- g.setFont(font0);
5 O& W5 o3 E5 b7 p# b A* R/ S7 K2 L2 L - let str = "晴纱是男娘";0 O5 d. U/ z* Q. b5 u6 J
- let ww = 400;* }! E, x9 q7 y3 T4 r
- let w = getW(str, font0);8 ~4 {: U$ T0 g4 L" a$ ]
- g.drawString(str, ww / 2 - w / 2, 200);
2 b6 G h5 z8 z8 R - }
6 Q0 B' k7 D& g+ x
% ~# w5 |! t! z7 j- const mat = new Matrices();
X; F* t6 P- \$ s7 L$ e- Y& X - mat.translate(0, 0.5, 0);$ P9 {- n: _; y3 V
" }" r$ d; [2 z0 l- function create(ctx, state, entity) {
: ]0 T+ z3 ^) w. W6 \& [ - let info = {
. L j$ ]; W' P* O4 j) B4 z - ctx: ctx,- G* y7 h: X9 \
- isTrain: false,
9 r3 [( q: f5 w$ Q! m - matrices: [mat],
0 @0 ^* o0 R- E. ~ - texture: [400, 400],
, e* y; E" F$ D! |5 q% X - model: {( K# @$ V9 B/ E% o
- renderType: "light",( m) q# i' i; n4 Y
- size: [1, 1],4 q7 @4 H `, l5 ]2 l
- uvSize: [1, 1]
% D% G. U8 l! z# H. p - }
& @# G" a, Z v$ b- G& W+ p7 u - }
) B& D; q( ]* z' i) H - let f = new Face(info);3 W* j9 V$ [3 }, k7 T
- state.f = f;
U: F: o5 _3 P8 w
. t1 k1 V. W( x3 j2 h9 ~. A+ O( r- let t = f.texture;; o: J: d; P* C. N6 F" S$ M0 c
- let g = t.graphics;6 K; t& n% T9 ^% q7 |. t) i
- state.running = true;
9 H: @' t6 @" k* d0 W! ? E2 M - let fps = 24;. n- X5 Z* z( O8 x) t& s
- da(g);//绘制底图* e" X8 d, @! [
- t.upload();- T8 F9 a6 x7 T# ^2 ], l
- let k = 0;
+ f' c! _, T. @2 {8 j - let ti = Date.now();
- T! K. }$ n+ Y8 {( Q - let rt = 0;
8 h6 j8 {, l( n3 V2 j* V N+ b3 Q - smooth = (k, v) => {// 平滑变化
# N" w7 |5 T/ ` - if (v > k) return k;+ Y4 u, N! h3 {0 R' J! T% i1 v, N
- if (k < 0) return 0;
' Z. B1 c- S1 B' R0 j5 B - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 }# ~0 d4 J! a# u: q
- }$ `5 L' p2 [; z0 R' Y2 p% Q4 u5 v
- run = () => {// 新线程
7 L# _) D1 E' B - let id = Thread.currentThread().getId();* X/ ~4 n% V3 N" c( x. w
- print("Thread start:" + id);
9 o% V" n4 ^7 c2 M7 g: V, f - while (state.running) {
% J; T* R" G3 p% X: a2 | - try {( |3 }/ P3 {7 ~! l4 f& S: V
- k += (Date.now() - ti) / 1000 * 0.2;6 G# C# U& @! }# W" c
- ti = Date.now();
4 Y2 ]/ d6 Y: y. p! p$ i - if (k > 1.5) {, {6 }- [5 f1 e3 w1 t
- k = 0;
. i* k% u& O! b! t3 s D3 d4 ? - }8 b5 _8 ^" b3 s: x
- setComp(g, 1);
# \4 y$ x' L- h' r) {5 O6 ]3 u- D - da(g);
1 I# f" n& z$ P4 I( s7 S) K1 D - let kk = smooth(1, k);//平滑切换透明度1 ~: j, y! Q+ s1 E5 `2 f9 J9 G4 P+ S1 }
- setComp(g, kk);0 R1 e$ S2 k! c. x) R
- db(g);4 G! ^) e- G% p: t0 |
- t.upload();2 h! C4 o, y x% y7 n! t
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 E% M! q" k. c$ [6 s! a - ctx.setDebugInfo("k", k);) ]1 s# C, s1 Q4 [, {
- ctx.setDebugInfo("sm", kk);9 _0 _! f5 }2 \4 E* F- K1 ~8 ?
- rt = Date.now() - ti;2 T1 n: u) T4 M& O1 o6 B' v
- Thread.sleep(ck(rt - 1000 / fps));4 U; W8 u3 u* t4 a" Y( C8 m% [
- ctx.setDebugInfo("error", 0)
- X, N) s R; z- u. ?/ C - } catch (e) {
% I) Z6 i1 ^/ I3 X - ctx.setDebugInfo("error", e);
- V [! H) k9 Z: w5 F: \6 @ - }$ V) t# y t$ r+ r
- }
0 H& @( Z" s! W W - print("Thread end:" + id);5 H* ^/ K" H* A
- }& W9 {: L8 x6 Z- l
- let th = new Thread(run, "qiehuan");( Q) E0 R% P {
- th.start();
6 [ R2 w( L& `7 s- x: B - }2 f* f" W0 M3 [3 d
" A9 h- }. S' F! t; A% N m- function render(ctx, state, entity) {
9 O9 \4 u6 Z5 r) v - state.f.tick();
; q- U/ @; x4 ?+ ?# V ~+ _ - }! G( Y" P$ y8 K: i
- e3 o5 x) | L+ ]
- function dispose(ctx, state, entity) {
3 e+ h! a/ k$ N! K - print("Dispose");
, v9 v( k& g$ N1 m( l+ b5 Q4 L) @) ?# V - state.running = false;- z% U( ]) E. \3 p0 g* [
- state.f.close();4 C8 i: S$ s; z5 R9 `* u
- }
# T; T3 X% o K/ Q& I p' J. W - 7 o$ s$ ~/ R9 N( W
- function setComp(g, value) {' h' o% _" w: d8 v' e0 R: J3 p
- g.setComposite(AlphaComposite.SrcOver.derive(value));$ z0 G6 w- p& H Y7 f1 t
- }
复制代码
- N% `8 k4 _" _9 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。, Z! |6 s# \+ n- |
8 D& Z& E1 T, ~ _2 Z
' ~9 U7 [$ ^2 }5 F. q$ l, X顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下); L; t% o! \* @8 J, k& W. g
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