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( R3 ~4 e4 v, R$ k, `7 E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。; ?- t) [- I: e( d
- importPackage (java.lang);: A$ L1 M$ l! ]0 O7 C
- importPackage (java.awt);, V8 q6 ~9 O3 E i$ s! O0 l
8 h+ m1 [, Y- G ~# w4 O5 n- include(Resources.id("mtrsteamloco:library/code/face.js"));( E5 D- V. C+ S. u) Q9 m
! c$ N$ c# b+ t. b% y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
$ Q6 h5 a1 g. U: h4 L
/ ] F; Y0 v6 x9 J3 ~" H- function getW(str, font) { L/ u9 h* }3 z6 J
- let frc = Resources.getFontRenderContext();& ~0 ^% D" V4 M. u
- bounds = font.getStringBounds(str, frc);
: ^ [; c3 U p1 @( r8 R7 K0 B2 ^ - return Math.ceil(bounds.getWidth());' ~! I% E1 A( k8 ~! N" ]
- }, J- w/ v$ U5 |2 U( n E5 k
- t( g+ u/ w5 n' ?- }2 a o- da = (g) => {//底图绘制# j: G3 Z @, r1 k
- g.setColor(Color.BLACK);
; p m9 T1 f: G- n. c- L - g.fillRect(0, 0, 400, 400);# ~7 E! H* _ k' R3 @
- }8 Z- ? w3 v$ X( u$ x' J% h
- 6 p4 B4 }: g; V) @9 M, m, \. g9 d
- db = (g) => {//上层绘制2 J# f5 Y; Y0 t# T3 N% a
- g.setColor(Color.WHITE);
$ f$ W+ S5 w; w d D: r: M - g.fillRect(0, 0, 400, 400);
$ i3 X" D; t/ X3 j/ ] - g.setColor(Color.RED);' ]5 T9 Y, _' ?1 S
- g.setFont(font0);
8 V9 ]8 ?( O9 s/ @ X/ ]0 b - let str = "晴纱是男娘"; o, X3 @0 x4 c0 H
- let ww = 400;
# g* F+ G: V: { - let w = getW(str, font0);2 n" W/ t/ N* f* W V2 e% C# _$ Q
- g.drawString(str, ww / 2 - w / 2, 200);1 A* e# U i5 B4 Q* b
- }, H/ F3 ]' X# Z! s/ c
- . d x; U! }$ y% ]7 [
- const mat = new Matrices();
7 }/ ~) D0 N1 |" t- t6 S - mat.translate(0, 0.5, 0);
( y) Z4 Q1 b3 n
4 ?' J2 l1 b. W7 i$ W* ~5 C- function create(ctx, state, entity) {
2 K6 `% L b, Y1 I4 w4 J6 ~/ A8 ? - let info = {
, e! A/ u2 h0 j2 Q( L - ctx: ctx,
t8 b8 h( h$ E1 B - isTrain: false, f( w, p! s& \& D# ^
- matrices: [mat],* B/ e' L, y- L6 q. {
- texture: [400, 400],$ E, j3 e- z* K% e2 A2 P0 Q
- model: {
' K7 q- j; |/ ]" `% Z9 ] - renderType: "light",5 v+ V" y; i, R5 h
- size: [1, 1],
8 w c( Z0 o7 w$ |9 M# H - uvSize: [1, 1]6 z. Q) N# \% A4 {( v
- }
8 }9 _! {4 i) k- k$ i$ z U - }
% Y4 ?% W$ l& \+ |9 ` - let f = new Face(info);% k7 _6 |0 L" k2 \$ H
- state.f = f;
5 B4 B7 v' L$ A+ Y - , n6 S1 o D/ G# `
- let t = f.texture;
3 s, w0 C) x; f - let g = t.graphics;# U y$ m. P) s! m
- state.running = true;# B6 n' d( S1 L1 G
- let fps = 24;
) A/ r t; N9 I7 T - da(g);//绘制底图4 B; k) u' `+ K
- t.upload(); c, o& S$ O+ U
- let k = 0;
7 G3 ^! M! L9 q+ w3 c - let ti = Date.now();. e- ~! R& |; h
- let rt = 0;# X: {- \: _3 ?! p: F b
- smooth = (k, v) => {// 平滑变化
% N/ x" K8 s* A# Z0 D - if (v > k) return k;
. @0 _5 U6 B4 E% K4 i. v: I( i - if (k < 0) return 0;2 f, V; i8 L$ V$ D: } K' t0 W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& k* S- k7 j& i- E# c% ~: s - }
5 w8 Z% Q/ m/ X+ o, g - run = () => {// 新线程
9 p) ?' q6 v5 K5 h% Z* a - let id = Thread.currentThread().getId();5 \( n* Y# O6 U2 ]# J
- print("Thread start:" + id);( s2 ]* t! o' z7 z, r
- while (state.running) {
' m- _7 X/ K1 Q% Q3 E: E- e( ? - try {% U) O, L( t# L1 K" m) c: w( I
- k += (Date.now() - ti) / 1000 * 0.2;
: j! Y$ U3 J5 T0 @1 d- }6 f - ti = Date.now();: Y: x `; M9 `( _% H6 }) Y7 o
- if (k > 1.5) {
& j2 {" L$ y! C9 w% x - k = 0;
4 j- { M& i& {- I - }* Y1 c/ g" r9 W; ]* ?8 B8 v! U
- setComp(g, 1);
2 @2 k4 x, Z) W5 @9 l& r M5 } F! m* f - da(g);
4 g% H% a" u& b c - let kk = smooth(1, k);//平滑切换透明度1 x5 v3 G0 g. `
- setComp(g, kk);5 T. L2 p1 y/ o+ m; w# Y% @* X
- db(g);( C3 e0 z( Y/ N
- t.upload();1 e8 X4 d" C9 J. u2 [ D
- ctx.setDebugInfo("rt" ,Date.now() - ti);; K# M$ i4 r% }0 G0 e7 Q
- ctx.setDebugInfo("k", k);( b( S4 q9 j0 a
- ctx.setDebugInfo("sm", kk);
7 O& Q1 \" k' G1 i, E9 l - rt = Date.now() - ti;
% s; c* y. u* j: a$ J& }3 G0 a: a - Thread.sleep(ck(rt - 1000 / fps));
) w- U, E: C$ D( I - ctx.setDebugInfo("error", 0)' A( F2 m/ U! i; @+ F
- } catch (e) {
3 l$ i+ X' ?5 Y - ctx.setDebugInfo("error", e);
3 b3 a: e& [4 U: W( k4 }" G - }. i( X: y3 T+ v( y
- }6 z' d# S7 K/ d9 v1 ]* i
- print("Thread end:" + id);1 V, j5 V9 ?3 q7 U
- }" }& n& j% `, \& k8 p" n
- let th = new Thread(run, "qiehuan");3 p2 B4 m3 r$ k* M5 H2 u
- th.start();
w; N. T0 X( s7 G% V0 O7 E1 m# i& m - }
" k; p. h! F2 c* F& }2 N! u& T - ) u, C+ l5 O7 T; @+ `
- function render(ctx, state, entity) {
( x1 h; X/ W# w, K - state.f.tick();! r/ [/ T: p& W; }
- }+ e) C. ^/ b) I5 C( H: A
& r: m f, V9 O( H i4 P+ U: F* `- function dispose(ctx, state, entity) {
" a3 S( p' E0 {+ Y8 s. [ - print("Dispose");4 X) ]: j. X; b6 i/ l: Q" }9 }! q
- state.running = false;5 E4 n$ k% S5 ~2 I2 D
- state.f.close();6 T, ~7 d9 I$ d t* ]& M& p9 N) {8 z
- }
, B8 k. f+ o! m5 d y
+ D3 H8 O* w4 }: |& P6 x' x- function setComp(g, value) {
8 e5 P; {) w- } - g.setComposite(AlphaComposite.SrcOver.derive(value));
! s& q$ \8 @; f - }
复制代码 * r% u# K/ {2 Y, r' V9 @ d+ \% G
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。
+ g3 b* z5 N4 i
! [7 x) U9 Z1 W: C% q h% k2 d6 W* K
9 A; }* u K; e0 f) o/ [顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)$ e ^2 y2 F! O; y' s7 U" ]
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