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$ |, ?/ `% d% @1 Z2 X- \& t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。; S1 ]; F1 C. ?9 T$ E$ R* h3 o$ d! N
- importPackage (java.lang);
8 u) J$ |0 J4 ?. z - importPackage (java.awt);
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6 s! f& G% C) a) M" [ N- include(Resources.id("mtrsteamloco:library/code/face.js")); b- ^& v! C& Z7 ^
- 6 O8 Z3 Z& M, i: d. M2 v
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ W# r( T4 S T0 ~4 F3 ?* o
- K E8 ^# p$ i9 _/ f( p- function getW(str, font) {
7 T" S7 S B. f) n, D5 ]% U - let frc = Resources.getFontRenderContext();
# S! [% B& n5 T# d - bounds = font.getStringBounds(str, frc);5 \% z9 f/ c% U8 R
- return Math.ceil(bounds.getWidth());
$ z7 Q6 `7 U7 R1 ?* R t - }: |+ R. [# ]0 o. x; c: g
% X# E" l+ [4 n- da = (g) => {//底图绘制, m B& f& H6 n) E( k- G
- g.setColor(Color.BLACK);
* D* ?8 a% Y9 Q s) H - g.fillRect(0, 0, 400, 400);% F d/ e/ k1 I: K1 ^& U
- }3 O1 \+ }/ o; ^7 v4 V1 H& F9 D+ Q
- * L: M4 f1 ]' F$ R( d
- db = (g) => {//上层绘制
5 ]5 Z6 J, E$ ~! o( J$ w& i - g.setColor(Color.WHITE);% w( V9 F9 `% q* ^7 M( {& _
- g.fillRect(0, 0, 400, 400);6 F, f1 v$ H6 p% l6 N
- g.setColor(Color.RED);
. ^2 \! E" e! @8 P! P$ v: z' ^; i - g.setFont(font0);4 P0 p4 Q& N( N- j% s
- let str = "晴纱是男娘";- J t$ E; N" D b9 L, l, J
- let ww = 400;
+ z) e, ]' @; H% P6 U4 f - let w = getW(str, font0);
9 M) h7 b+ x. b& Z - g.drawString(str, ww / 2 - w / 2, 200);! Q5 T" ?/ I& y
- }' f& U6 i% ]9 \, W' |
/ g% `& E# R0 o! m( V0 H \- const mat = new Matrices();; ?8 F5 {% L" n6 \% u
- mat.translate(0, 0.5, 0);
3 E2 T/ ^) T# j6 d1 [
% p0 c: W/ f' `3 i( E4 |3 W- function create(ctx, state, entity) {
& T' b2 ~& U2 p# ^' F3 b, c/ J - let info = {& J! M# D5 y: K7 d
- ctx: ctx,
L* N" K" F9 j7 O1 q - isTrain: false,
2 c0 l* Q7 d' ^5 l - matrices: [mat],
! t( X. ~; j" _ Q# } - texture: [400, 400],0 f$ r5 ?" P3 i1 J! K5 x" r
- model: {
; g0 x3 v& R! e, [. S4 y& n( {" @ - renderType: "light",
7 h7 L2 ]' P0 Y0 i* O g, m - size: [1, 1],
8 y3 K4 g; q# |' R3 h- ^# E - uvSize: [1, 1]
0 P _4 v: c5 e4 ~. ]2 L - }
" K/ q7 D5 U3 G$ n( V6 l N - }
9 l1 |/ d# Q/ L) }- K& V - let f = new Face(info);- \1 [+ w M/ |3 z( y$ Q
- state.f = f;
S, ] R: a; J9 _& Y% x - & ?4 I% ?$ c( ]' b& D1 \ z" O
- let t = f.texture;
& l: d6 Q/ A6 ^# m+ p" Z - let g = t.graphics;) c: ?& C+ t' [
- state.running = true;
2 ]+ `- c2 V9 y) Z5 Z% q - let fps = 24;
5 A% `! k) r" q' c# B - da(g);//绘制底图
, R P5 |, x" F3 G/ w% `/ ~ - t.upload();, \# A; O' N: e) {) W
- let k = 0;
9 _) B; N6 e4 V @ - let ti = Date.now();) Z% L8 f P. @& O
- let rt = 0;1 k3 ~3 O1 B9 {' X4 N
- smooth = (k, v) => {// 平滑变化: l6 k) A. g- k4 f! |8 i
- if (v > k) return k;
9 p% t1 n5 {$ Z1 W" [- z- P1 M% j5 f - if (k < 0) return 0;1 S2 N) J' I! r; I* m9 |( V Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# V4 F) Z7 x( y/ u
- }
% K% j+ {7 J$ U& F6 f K" W4 ` - run = () => {// 新线程
- }6 Q5 Q2 @- j: i& _7 K7 c+ a - let id = Thread.currentThread().getId();
4 l2 V& ^% ]5 a: u1 f2 } - print("Thread start:" + id);; X8 `2 h! T1 G6 s+ k
- while (state.running) {' o) L9 z: X, C3 s& q2 }/ e
- try {
8 A* i- m. w7 L5 n# e" _$ B9 u - k += (Date.now() - ti) / 1000 * 0.2;
% s( ]/ @$ U, M$ l2 Y1 c - ti = Date.now();
1 n1 P2 ?) |1 x1 c - if (k > 1.5) {
2 j% H# P' G$ |# e# o0 g - k = 0;
6 s. t- S% y9 u) @1 ^( a& }* ]( Z - }
7 N: n# ?& k& A2 K4 h1 h! d( k - setComp(g, 1);
- ~: m& G h- A1 h - da(g);) N! D1 f( B4 S' k
- let kk = smooth(1, k);//平滑切换透明度- L8 R8 s3 N0 X8 v A
- setComp(g, kk);
/ v; i3 w5 X( [# P5 l1 _ - db(g);
7 v& {, E w* m9 v8 w - t.upload();3 j* c& ~* `% J* a
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& b& F0 l6 I8 W# D- t2 C - ctx.setDebugInfo("k", k);% @ s* J" f& X- g7 p
- ctx.setDebugInfo("sm", kk);& k( c+ |8 l/ S( D
- rt = Date.now() - ti;9 d( \& Z- Q# k/ Y" ~8 E9 w r
- Thread.sleep(ck(rt - 1000 / fps));/ s' g# q d' r
- ctx.setDebugInfo("error", 0)2 W I, }# i0 i" D' s6 e# H% T/ c) X5 I
- } catch (e) {! U* x* i1 d7 A" H
- ctx.setDebugInfo("error", e);( k, g$ U. t0 v8 p& r' `
- }) j0 ]4 ?8 A5 A; ?( `4 Q
- }- W% C( l* c6 P C8 Q8 S1 {. h
- print("Thread end:" + id);" j0 `4 `" b1 @1 Z8 @8 l- i! a
- }2 |6 |8 B/ T* R/ n0 }
- let th = new Thread(run, "qiehuan");
% i2 [3 o; F: s. W% Y - th.start(); k2 _$ @# F0 n3 t% O
- }7 b% O' k' {6 ]+ y7 ?/ v. ^
- ) ]" s+ N9 A2 T; [1 l( ~& S' n
- function render(ctx, state, entity) {: J0 a/ j- K% {% Z4 j, S! c
- state.f.tick();: z$ @1 d! M& O# W9 l+ D b. m
- }
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4 G/ l' F1 {6 Q; V- h- function dispose(ctx, state, entity) {
# a0 m4 {: p' \. i5 u" ^ - print("Dispose");6 Y! t. F7 k# g! U' K( ~7 D5 @
- state.running = false;. _" _5 q; z. o% z0 _+ d7 V6 t& ^2 ?6 }; A
- state.f.close();9 `: ?9 y. M3 c a
- }
3 g6 ~ v; O) F( e# e$ v( t' O, V
' @: M, k7 S* s# O, W* l i8 ~5 {+ N- function setComp(g, value) {
; ^, t: `; O7 x% y - g.setComposite(AlphaComposite.SrcOver.derive(value));" L8 R( y- W$ T3 o2 Q& A6 ~
- }
复制代码 - K- k! I& v2 t- X& `& O. u+ ^
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。9 T$ D1 [0 ^2 C e- V2 U
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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)2 L0 R8 D d! Q) ~; x8 x3 i
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