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! w, T/ v9 f' j0 F; z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。9 B8 a& E% O! R3 i8 o
- importPackage (java.lang);
I" Q# T, s7 f, ` - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));$ P( e1 l1 I, }& z% z4 }% q" G
* \8 T* {9 C: }- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {; X& j7 f' o1 d! v
- let frc = Resources.getFontRenderContext();- p1 B& o. S6 V2 {) h- r) U
- bounds = font.getStringBounds(str, frc);
1 T4 Z% S: e$ f4 O - return Math.ceil(bounds.getWidth());2 a* d3 N3 H; A ?( j8 g
- }, e7 R5 z- t" F
+ x& Z0 W+ _2 D: s" `. W0 k8 t- da = (g) => {//底图绘制 w$ b- Q3 I" {3 y# I
- g.setColor(Color.BLACK);
( y0 H; ]1 q; T$ u - g.fillRect(0, 0, 400, 400);
6 _" B# S* I4 H" L& r - }, R( A' [4 T" I% R% L* a- {
- & ?1 l! T E& X0 g
- db = (g) => {//上层绘制
5 w* |7 z* J1 _, T: g! @6 W - g.setColor(Color.WHITE);9 W- ~5 L1 T3 W
- g.fillRect(0, 0, 400, 400);
/ d4 a) X7 e. o4 U - g.setColor(Color.RED);) n2 n5 f+ R3 b! r
- g.setFont(font0);8 l: ?/ D+ g% Z* q* @
- let str = "晴纱是男娘";; o4 [$ t, j. @ m# b+ ?2 U
- let ww = 400;, D/ J2 ?4 i8 k( _
- let w = getW(str, font0);: P2 P3 b' z! w9 u$ L
- g.drawString(str, ww / 2 - w / 2, 200);: o$ D( _( o. J4 |9 T; F
- }
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2 x* c, p! J( ^$ Y1 V, z% V9 v; \" s- const mat = new Matrices();6 o2 _( x; C% H; a( _2 A
- mat.translate(0, 0.5, 0);
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" h$ p W, C7 `- function create(ctx, state, entity) {; F7 z" n- @1 h7 x8 g8 t! m
- let info = {
* i5 V/ o( h7 F& X7 X - ctx: ctx,
6 X7 N1 k& k3 b& i - isTrain: false,. u+ @+ X/ B- b4 R
- matrices: [mat],
7 z( e& ?2 m; J) o - texture: [400, 400],; A% p5 a# H" S5 v( I7 G) \
- model: {
/ J4 @! ~7 r) U( v! `1 D4 \ - renderType: "light",4 U6 `2 P6 r& q5 r9 O
- size: [1, 1],
1 g% [2 J8 m# H& b* [8 ? - uvSize: [1, 1]8 c# y3 D& @' { f+ F" Z
- }
! Q: `, w+ |- S1 s0 k - }
" f. t) M7 ?% d - let f = new Face(info);
' Y1 T0 |* s2 I - state.f = f;
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! p, _+ C- W {6 z4 K! p- let t = f.texture;
& Z- |& r) `; c" D' i4 V - let g = t.graphics;
: C" @, J- D! {4 f7 L7 O - state.running = true;
( W7 p# U, Z" ?4 q8 ` - let fps = 24;
0 ? u+ Q) ?9 ]7 ~) k8 v; K9 X - da(g);//绘制底图 P g8 u6 C/ u, p a9 M
- t.upload();
, V3 P* r7 R! K# |7 x: L7 ?2 T - let k = 0;- R- O3 z2 L3 U- N* k; P0 X
- let ti = Date.now();4 ~( y5 }* y% `" a
- let rt = 0;
6 {' Z5 K* {$ M3 [1 n! T - smooth = (k, v) => {// 平滑变化
, H6 k: H1 f, Y+ ^ - if (v > k) return k;+ f" b& o% ?" \8 ~+ t
- if (k < 0) return 0;
! `0 E4 ^6 X& x5 _ n* p - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& C* Y% o! ]7 X$ @; E% k
- }1 C/ O3 N5 W4 d5 w& ?4 [
- run = () => {// 新线程
# W+ U& t- `8 ?7 a! J8 E - let id = Thread.currentThread().getId();
0 m8 v0 L; f/ |4 D/ T - print("Thread start:" + id);
2 d! c& U+ |" V) B% o; H$ f - while (state.running) {
2 r6 V% e, p% D7 `6 @, Y6 Q - try {
3 r0 ~% v" y4 }1 L - k += (Date.now() - ti) / 1000 * 0.2;
4 t4 @4 T0 s. g1 j( Z* \ - ti = Date.now();
0 {- l( \4 y: X. t: z - if (k > 1.5) {
4 X% u- }# [9 f7 m' w - k = 0;
* _4 @% _7 A) o! P; B - }
# z9 T5 ~! ^; j+ i! i$ R - setComp(g, 1);
9 v$ d0 V7 d$ G0 E9 G2 u s - da(g);
3 d% N" n- h5 g" h% ~5 `; F. a: Y - let kk = smooth(1, k);//平滑切换透明度
9 w5 H$ k; R! X; p6 u - setComp(g, kk);1 m' ~; ?' r! j
- db(g);
3 k; g- d9 B6 G8 S% U4 v0 b9 A1 V - t.upload();" c# G% ` U4 [ F) ?! i
- ctx.setDebugInfo("rt" ,Date.now() - ti);) ]) B( {: U' M4 }7 { q! I
- ctx.setDebugInfo("k", k);
* X. n, P3 l) v( t - ctx.setDebugInfo("sm", kk);
% Z/ e0 E2 d+ R/ {+ G7 c7 C+ i - rt = Date.now() - ti;: l8 v* H# s, o" D' M6 O
- Thread.sleep(ck(rt - 1000 / fps));
" j8 S' ~7 v6 l' W5 U- I v - ctx.setDebugInfo("error", 0)8 D0 l% [+ a) |8 t3 X
- } catch (e) {
' ]: M! U v6 w. j - ctx.setDebugInfo("error", e);8 K' W# i4 E/ j! n: g0 i; N
- }. E, ?+ a% ~+ H; _2 S( C
- }
8 U0 v( H( D1 B9 d Q - print("Thread end:" + id);9 L( E' x9 A( E+ Y4 o/ I, Z) ^$ Q) M
- }
, f" g* G: k! g% J: Q f - let th = new Thread(run, "qiehuan");. C) e2 ]0 Q3 U( X- h
- th.start();& _$ I1 o) M& |! d+ O8 M2 k0 s
- }
; d" q w: V, s% d) i
. ~4 `& w" K6 _6 N: i0 |- function render(ctx, state, entity) {( P9 c+ E9 Q% w2 K
- state.f.tick();
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- 6 C2 ]9 h0 k! S! o" Y5 H% d! Q3 @
- function dispose(ctx, state, entity) {( z' e# V5 Z1 F6 J) V& F& ?! a
- print("Dispose");0 s8 F$ r, S, B& C. b4 z9 W' H
- state.running = false;
, {/ {9 B6 \4 v9 x - state.f.close();' Q7 W# _& x7 {
- }
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- function setComp(g, value) {
* {) @# h( C7 J k/ e - g.setComposite(AlphaComposite.SrcOver.derive(value));
' I9 p4 T8 K4 v* s& E8 U - }
复制代码 & V1 V9 O; m7 g$ p' `7 Y
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。3 b% F; V! s9 V2 |% f2 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)
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