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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。% b% q0 o" I, Z
- importPackage (java.lang);1 f' g/ a5 a2 q% C& ~. |) L/ {2 I1 v
- importPackage (java.awt);
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& [) n3 q# V/ f) r# `3 m8 T7 k2 M: h: G- include(Resources.id("mtrsteamloco:library/code/face.js"));8 r8 U7 y4 X+ P- m
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& f1 ?1 F: ~6 ]* U. _
- % |# D( Q+ I$ D, v0 Q7 w
- function getW(str, font) {( G# |- _" g: ^1 f' i2 A* u$ r7 ~
- let frc = Resources.getFontRenderContext();# O$ `) Y% `# a- S
- bounds = font.getStringBounds(str, frc);- x! ^; O# a/ J& T8 s* U0 v
- return Math.ceil(bounds.getWidth());
( s ^- ]& v8 z( o; l+ J - }
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" ~6 ]; Z1 b3 o* R/ v! o, F) g4 }- da = (g) => {//底图绘制
, v4 I4 M% I) u# x! @: X - g.setColor(Color.BLACK);
8 b! y* i! ?1 H3 s0 P0 W6 a - g.fillRect(0, 0, 400, 400);
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; I# [$ x7 g7 a- db = (g) => {//上层绘制* Y3 [; U. \3 J$ j2 C9 @, E/ k+ M' p
- g.setColor(Color.WHITE);
( A' W1 N0 C. V - g.fillRect(0, 0, 400, 400);. v5 q2 \5 h$ }7 c2 Q$ Z9 U
- g.setColor(Color.RED);2 f5 |* J- m d- B* d
- g.setFont(font0);- F. A' V. O! k8 S1 O* L' O
- let str = "晴纱是男娘";* p w1 i+ R! C' l2 w, v8 ^
- let ww = 400;! g: E7 _- Q7 v1 o- Q
- let w = getW(str, font0);
1 y8 Q1 f3 Q- s$ w+ ?' @ - g.drawString(str, ww / 2 - w / 2, 200);5 M+ E9 a i" d: m
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- const mat = new Matrices();, h) s$ h+ G8 G+ n( j
- mat.translate(0, 0.5, 0);
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0 X6 C/ t( r- l9 i/ e9 H1 I% M/ |- function create(ctx, state, entity) {
+ a5 b3 T. x+ {3 r; r - let info = {
; o& t$ f( \6 i3 H! X1 d - ctx: ctx,
* P9 b; @+ J2 l N9 ~6 W - isTrain: false,* ?2 O2 x; e& k0 h; f4 M1 b
- matrices: [mat],2 h" R+ T, F; n( d
- texture: [400, 400],
; V# l% ~0 o5 V) r9 g. G - model: {
& q6 a: l; r k4 R2 w( K, ]; |$ S - renderType: "light",( B8 b. t, a( H/ y% f
- size: [1, 1], u! j1 c" R( r% C# s
- uvSize: [1, 1]0 c2 }% K; `" }$ \4 P
- }
) c8 H$ j0 d2 @4 u e* t% ^0 ` - }
' ~$ o* x) L" J5 g/ i% {; o - let f = new Face(info);
! J+ w* b) I; b* j - state.f = f;) c' O- Q: y3 l) Q2 E# s
3 h1 o, `( ^, p! B4 ~0 W) j9 B- let t = f.texture;& o/ K7 }% D' E9 \
- let g = t.graphics;0 q$ o" g$ o; w5 ` w" G: b' \
- state.running = true;
! m D V. Q( M, N# k3 a$ T - let fps = 24;3 T4 r, S- F1 t. C4 F
- da(g);//绘制底图7 Q" V& m! s1 } _& ?# m
- t.upload();
7 m$ O# Z9 L3 c- w& ^" F9 E - let k = 0;' H3 h1 z$ g% x. `0 I. F
- let ti = Date.now();
4 s+ g9 G2 K S d1 L - let rt = 0;2 b7 x& C+ D: E; g0 G; A4 V
- smooth = (k, v) => {// 平滑变化+ N, l1 v Q4 Q+ t# Q- i: Z3 {
- if (v > k) return k;
7 |1 w* t% G, [3 U9 }& {1 j) ? - if (k < 0) return 0;
' ~: R3 P" |1 h, O5 |3 Q a - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" z( }: n5 X; S1 P" W3 ^
- }
0 X' ~; Y/ ?% c a& I - run = () => {// 新线程8 _ o: W O* Z
- let id = Thread.currentThread().getId();0 H( j( U' X) Q; ~3 L6 F& C
- print("Thread start:" + id);
6 f* U6 V; c5 \- f - while (state.running) {( D; P' w! x8 X- ^
- try {3 l4 O* d+ L! q$ k0 j6 j- l
- k += (Date.now() - ti) / 1000 * 0.2;
( c1 ?, I# ^. I" M - ti = Date.now();3 M2 w) S. M- g+ i, ~2 y
- if (k > 1.5) {
( r Z" L: G7 Z7 W - k = 0;1 \* V+ A, E1 r& j8 U
- }( ^8 A0 p3 V8 X, e9 B( a# ^
- setComp(g, 1);
8 Y& t0 ]# U7 q1 F' }( p2 c7 i - da(g);
6 F: k7 N, S% H/ \9 b - let kk = smooth(1, k);//平滑切换透明度/ S) s: n8 C$ S- b+ n
- setComp(g, kk);
+ H- L# |" L9 b* z( q' j - db(g);# _( K7 ^ r2 H; B- l
- t.upload();
1 B b6 V6 \+ G7 {$ W6 N3 B - ctx.setDebugInfo("rt" ,Date.now() - ti);
* B a$ x& }, Y - ctx.setDebugInfo("k", k);
' ^- n6 w7 q) \2 w6 q - ctx.setDebugInfo("sm", kk);# Q5 S5 }- ~( E, u/ ?
- rt = Date.now() - ti;
! d& g2 y) _5 v# M8 | - Thread.sleep(ck(rt - 1000 / fps));
2 M8 W2 z6 ?* E9 C1 s T8 Q - ctx.setDebugInfo("error", 0)0 `9 E7 v1 C, [$ g% p1 C' u2 d
- } catch (e) {2 x& `+ F) W- R7 n+ W
- ctx.setDebugInfo("error", e);) ~ a# R9 T( o. I
- }
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- print("Thread end:" + id);' M1 l* P: W1 H; T) J4 L
- }
0 c7 H2 L3 G4 ]0 [% O/ U. q - let th = new Thread(run, "qiehuan");, O! }1 O4 l) j1 s
- th.start();
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0 W* X2 i2 T8 p3 n7 S0 p. t" C- function render(ctx, state, entity) {$ F( ^" y b" |) f- \ j
- state.f.tick();6 }6 z/ o3 ~% b! h& @+ W; p
- }1 ]6 y! y3 f1 `9 f; ]- z
- . I, ?+ J" c7 Z, ~
- function dispose(ctx, state, entity) {
1 H1 A5 i/ J0 v$ } - print("Dispose");
- m1 D, V' Q# b$ o* P6 P% j @ - state.running = false;
4 g$ V8 I0 u( m, B7 r! m ^: u - state.f.close();
. }# W* S0 \% o/ j. }) n( o - }
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- function setComp(g, value) {
4 k2 L" u7 q$ v; [* ?& | Q" Z - g.setComposite(AlphaComposite.SrcOver.derive(value));
% f- \ u7 r( v. L" p - }
复制代码 3 A6 }# t2 \9 u8 @4 U! L7 r
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。
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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); y3 T" L8 `$ i+ @7 j) y/ s' }
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