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$ P: m# W$ a+ @5 W& X+ `, d N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 X9 b, s1 o. f; B g' x$ f' W, [- importPackage (java.lang);! \( v+ I6 R8 B* ~2 d& N
- importPackage (java.awt);0 d% s1 F% D1 C2 d( P0 u+ z& A
- $ K/ z" |+ w9 b( P! X, L% c
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 ^1 q: G; n; u1 G: S/ |
4 ]% N& C2 ]& a. x" _" r- function getW(str, font) {% y( K, K5 i1 _" c: @/ R c
- let frc = Resources.getFontRenderContext();0 `; j/ o# C( V- }$ I, a
- bounds = font.getStringBounds(str, frc);
0 q% f. O" @! F1 }: W' { - return Math.ceil(bounds.getWidth());3 ?& V4 S4 D5 J/ L% ^
- }
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; K8 ]* A& ^ v" o+ m- da = (g) => {//底图绘制% b* @. d) \8 ]
- g.setColor(Color.BLACK);% d; X) i( }$ h- j2 l
- g.fillRect(0, 0, 400, 400);4 _6 g2 D4 q0 _ c0 a- p' o& _
- }
+ p1 @- W7 d; j G# O
5 x5 d" H3 J) `# o- db = (g) => {//上层绘制
) {6 g* r: ^' q, D( ?$ R9 Q+ D4 w5 R - g.setColor(Color.WHITE);3 ^, [% {$ n2 ^1 @; e @2 s2 e
- g.fillRect(0, 0, 400, 400);! U' Q3 x1 y# x* s* H7 i
- g.setColor(Color.RED);/ }: K) V. J" w, T- G
- g.setFont(font0);
+ i( d8 `2 @8 b( l9 v$ X; g - let str = "晴纱是男娘";6 T) I& i& |: @- j
- let ww = 400;9 c. n6 }: Q( c# Z
- let w = getW(str, font0);
+ f6 u& ^1 `. P, e9 ^; I; w - g.drawString(str, ww / 2 - w / 2, 200);
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6 R. f" c( s0 k7 U9 W' ~7 n* \- const mat = new Matrices();
1 r3 u% c; L- N/ }. q% I0 _ - mat.translate(0, 0.5, 0);* s' J( q% O o
- 7 d' A8 A& K k! ]3 b( H" h: X
- function create(ctx, state, entity) {
: r2 Y- E5 w. R" r9 x - let info = {
+ Y# b; ^0 s0 v$ J! W+ k2 I w - ctx: ctx,, z9 Q. ?& E5 B; O, ^
- isTrain: false,
. x0 P: n/ X% [4 D( b - matrices: [mat],5 n& U/ ~/ X$ \/ N
- texture: [400, 400],3 t# h1 s5 Q' B) y# W
- model: {& d, Y4 L" n& |( M; U. W
- renderType: "light",3 N% |/ [3 G) D8 V0 w
- size: [1, 1],
+ ~; ~' z9 W7 V - uvSize: [1, 1]* E2 b- f7 J( R6 b' r
- }
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- let f = new Face(info); M) j" `/ X& L% V. b
- state.f = f;, `0 R7 {1 T! q; Q6 G T3 v$ k
- + z$ D! b+ ]$ R x1 U2 O2 J: I0 G5 f
- let t = f.texture;
. W% @& h1 u! X, ?8 B - let g = t.graphics;
8 P. }; @: z/ I1 }, N% e5 @ - state.running = true;0 o5 w. {& w$ `( J0 s/ t8 j$ M
- let fps = 24;3 V' C9 ?/ B3 G
- da(g);//绘制底图% h4 H. r* A7 L7 I; w
- t.upload();
" p! z8 R( D! H- [" x2 [# _0 P - let k = 0;& M( h5 [8 n: i. g& d3 z! x
- let ti = Date.now();5 B# X4 g- G& A* |
- let rt = 0;
) k4 X. f1 x1 G' X$ u' f* o - smooth = (k, v) => {// 平滑变化. ~+ c8 X+ z: q
- if (v > k) return k;
, B N7 G0 [% Q5 T2 y - if (k < 0) return 0;- E1 t% r$ D0 j; F, L) Q! @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 x0 m: n1 I: u* e: B - }
8 i" f/ M' g9 ?8 ]0 e! i( Q - run = () => {// 新线程% D* i: h) c( @3 Q; p
- let id = Thread.currentThread().getId();% ]8 T5 i& o% @0 @- o F1 f2 |
- print("Thread start:" + id);3 G8 K, `. \% O9 `( I: ?" Q+ l
- while (state.running) { X8 O- Q/ |1 _8 L5 A4 O2 D+ [$ a
- try {) G$ ^1 ^$ N9 ^8 I' r
- k += (Date.now() - ti) / 1000 * 0.2;
o, ^- R2 `, T; W4 z( X9 }3 P - ti = Date.now();, J# Y* V/ J- V3 k0 @# l( l
- if (k > 1.5) {
& \5 n- m1 \) y4 e - k = 0;6 M: }$ I" n) V; M
- }, r# r! h2 d4 l% j$ W7 ^
- setComp(g, 1);
1 ]+ g. y( _; d! i' @ - da(g);
2 c1 v" y; c& \% [9 S - let kk = smooth(1, k);//平滑切换透明度
1 `4 W& b* g) t6 V - setComp(g, kk);+ r& D" L( V6 S/ v, f
- db(g);
4 H5 z6 F' M& a" Y; ] - t.upload();
: v7 g7 _3 X) B7 t# I - ctx.setDebugInfo("rt" ,Date.now() - ti);
. _; S4 r6 s" E/ C( Y | - ctx.setDebugInfo("k", k);+ x- l. l s5 H: G; j, O$ q
- ctx.setDebugInfo("sm", kk);9 _5 n/ W+ M3 x1 f
- rt = Date.now() - ti;
" b' `9 h) ?, p2 H - Thread.sleep(ck(rt - 1000 / fps));4 J% s h4 x, D" ~6 M) \
- ctx.setDebugInfo("error", 0)
L8 u( g: r% o3 {. C9 K - } catch (e) {
1 }2 y, D" y l N& u' G+ f0 S - ctx.setDebugInfo("error", e);
1 U2 A4 v3 u9 ?( } E9 W7 j - }
/ A; u" W; }' } - }2 Y( q) s! U, g
- print("Thread end:" + id);
2 e6 K' y) S& _ - }
1 h4 j6 X! R8 h - let th = new Thread(run, "qiehuan");* \; s+ z; P4 d- w$ y
- th.start();
1 S4 V; s. V; O% o" G& s& }* P M9 d - }
9 ]( K! j* U1 ]9 R; l! c
& M! b, N2 U) A* P: A- function render(ctx, state, entity) {
! C5 ]; \5 b# q- ~3 Z% F9 P - state.f.tick();
7 Y' a- r7 q+ F. o S$ K6 J- E - }
* n3 v& S1 u5 W2 {) a. M! X
! {( r+ [! _) j# n- E4 Y" x- function dispose(ctx, state, entity) {
6 c2 Q( W5 ~, F' b* K2 m6 E - print("Dispose");
: p4 A+ Q5 P( M$ m - state.running = false;
( n, k$ \$ m8 n# ]! A: q - state.f.close();
" ?4 t2 x0 t" K) u' s - }& O- n1 V6 |( k( H5 g- f& K
- ! R G& h( C6 z( V
- function setComp(g, value) {; g r/ o+ h, s% N8 y
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ A1 F1 a' k% L! X" Z- P
- }
复制代码 / j+ {+ n# X+ m! 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。
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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). z! g- \* H6 I1 S9 X
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