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6 k! F0 ^8 p, {/ T" X7 }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。
% y6 h) u$ V# y/ l7 @) \- importPackage (java.lang);
* U+ w$ ]! N' B& H7 ` - importPackage (java.awt);& a( \& e4 R) h! P7 m9 f3 Y
- ! \, g7 e/ I3 ]; i
- include(Resources.id("mtrsteamloco:library/code/face.js"));4 d/ f" P8 k& Y0 K4 ^+ s( L: `
. W" M/ A% J* U+ p3 \, y0 a- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {8 |, u) l% w$ _% _% m7 t8 q
- let frc = Resources.getFontRenderContext();
z% w0 f* V. o - bounds = font.getStringBounds(str, frc);: D9 E+ S- O1 U
- return Math.ceil(bounds.getWidth());
9 G- Q: \, B" \- y/ Y1 b$ T - }
2 w% u4 y& Q' _+ G. v - P& ~$ S# k4 y- F5 n" S# O4 l& j6 e: m \
- da = (g) => {//底图绘制
+ V( @( v; ]) P2 B - g.setColor(Color.BLACK);
* M$ U! V c# K, n# F7 ^ - g.fillRect(0, 0, 400, 400);
1 R# O2 p4 T4 {3 J9 h - }6 N! X' c6 Q# x9 I
- - O; O: k! ~$ Y% ~5 N
- db = (g) => {//上层绘制. h1 e. W& B# r5 I. b
- g.setColor(Color.WHITE);
* Z. T3 S$ C; T' R8 I6 g - g.fillRect(0, 0, 400, 400);2 Q6 e* L& L- n! ]; |# }
- g.setColor(Color.RED);
b: z* T0 {& f/ b( \) z - g.setFont(font0);- ?' {6 T$ J4 ^3 E4 F" \
- let str = "晴纱是男娘";
' B3 i1 J6 i7 c: E, j - let ww = 400;3 ^) W1 L6 Y8 e: q6 x' F; j( |7 Q
- let w = getW(str, font0);5 o$ u, b# i/ _7 }
- g.drawString(str, ww / 2 - w / 2, 200);7 C0 H1 }: G; [
- }& N: V. u( W* f0 P' t- {
- & J; e1 l9 N, c3 B' Z$ ?7 S
- const mat = new Matrices();
, Y: U) {3 i% o: H$ B' \ - mat.translate(0, 0.5, 0);9 R0 G# N6 o/ a- ^7 ?
- $ L" N" C! S1 u4 O
- function create(ctx, state, entity) {) Q- ~* z( L' F; Z1 C
- let info = { P5 A S! c s5 X) e9 w: _# s
- ctx: ctx,+ z$ }1 B4 Z; {; g5 I9 f8 g
- isTrain: false,
, O9 T3 ^& }, l; Y( f3 _ - matrices: [mat],# K5 |* C5 o8 ]1 h4 F
- texture: [400, 400],
8 X U4 G6 P l, a- a* G: q3 u - model: {
3 y+ ]9 M: b: f - renderType: "light",! P: }) c* K/ g8 x& }( U S
- size: [1, 1],4 c7 N1 S# q! I
- uvSize: [1, 1]
2 `, Q$ X9 ?" i. B1 n3 w7 t$ } - }
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- let f = new Face(info);
* [8 }! Z9 d4 D9 N/ M - state.f = f;
0 |( ]2 Q/ V, ], N' D - 7 U2 k. B, ~4 y3 v }
- let t = f.texture;& ^3 T: x3 M- D U4 d8 ]
- let g = t.graphics;
' g) S7 P9 |9 O7 [! t - state.running = true;
$ U1 [2 a9 j) s- L; K: m - let fps = 24;2 l, r% I, {3 ~6 l. k
- da(g);//绘制底图8 R. O9 E' l3 F% O. A w# `
- t.upload();
# H+ m/ r1 w$ a! `; P - let k = 0;
* b4 \- |4 e, _4 ] - let ti = Date.now();
6 W7 j' R( x) Q - let rt = 0;
( \5 w; T, D7 W& s - smooth = (k, v) => {// 平滑变化
! F7 z+ V* \. D2 ?5 H5 o7 G - if (v > k) return k;8 n2 \9 I1 g5 s1 ?; b
- if (k < 0) return 0;+ X6 f1 L! L/ K1 i l n4 m
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% N' f/ h! m% r- J5 ~, w. g6 N
- }
5 h% i3 X; U& i; L% R6 e - run = () => {// 新线程# y O7 f$ z2 q6 M
- let id = Thread.currentThread().getId();
( V/ P0 n" e8 H2 o. t+ M$ U - print("Thread start:" + id);/ B! ?) \0 ?( y& p
- while (state.running) {
1 m! Y0 k# U, l! @% g8 q& r, Y9 M - try {8 e" k C# M& s& t, C
- k += (Date.now() - ti) / 1000 * 0.2;
* p" Z4 w% z) h$ z! f5 X5 j6 D - ti = Date.now();
: H7 I7 e+ k0 I9 j# K9 |( P - if (k > 1.5) {6 j* T {* R8 \3 a7 ~+ E t
- k = 0;* `3 F) Q- B4 @- M
- }
3 t# U4 P5 H. o4 Z( S - setComp(g, 1);
* }$ [. Q( T+ c, ~. Z i - da(g);: v0 L; C; _2 j6 A' E$ e
- let kk = smooth(1, k);//平滑切换透明度
- r# w2 c. {' y- Q, D* A/ P* u - setComp(g, kk);) x9 m d; Q; u, w* x C6 |
- db(g);
5 G% ~1 ?) b. v5 y! c3 ] - t.upload();
3 u# t+ j# D n2 o: s+ m - ctx.setDebugInfo("rt" ,Date.now() - ti);
! z5 a1 c8 p+ Q' Z; I - ctx.setDebugInfo("k", k);
- u& k6 O! ~- ^& `# }- X) Z - ctx.setDebugInfo("sm", kk);
$ ]# Z& {6 B; }, c& S$ e - rt = Date.now() - ti;; g* M Z! u" B; c- t7 |
- Thread.sleep(ck(rt - 1000 / fps));
; G. l" c, \( @5 B# j: | - ctx.setDebugInfo("error", 0)
. g( y, o/ Y# V& ~, v& W - } catch (e) {
' b t! X+ Y; q - ctx.setDebugInfo("error", e);
+ ~$ Y8 u1 ]3 k/ r$ j( S6 ] - }
s, ]2 M3 Q1 x$ W# }1 V - }
* D; i* ~, k* h4 i/ H$ r; A2 d - print("Thread end:" + id);- B, q) q c7 Y. c
- }
- l y* l% w' G5 p - let th = new Thread(run, "qiehuan");
8 Z( ]/ r4 C& E' c$ S. I - th.start();
0 b' v" X! N2 O; X( z+ ^7 A - }6 l( F3 [3 i4 K9 \+ N2 e
- , I4 Z5 T, i. A- @$ [! Z
- function render(ctx, state, entity) {
5 d2 q$ L5 U A' K5 _! ] - state.f.tick();
- }5 d2 O1 x9 f& { - }
( B9 h; I- V/ k
% P" N6 r9 i& @6 j+ ~" D8 C9 A3 R- function dispose(ctx, state, entity) {
& g8 y* H; R" `+ f2 d - print("Dispose");& v0 o4 _4 ] a$ g6 X
- state.running = false;* k8 H6 I" P( C4 f; ]
- state.f.close();
/ t+ W( a3 X# P3 ~0 ^' g - }( R$ ?3 Q/ Y2 z* X8 l8 `. H, f
) G2 c' H8 r/ z0 H' R- H- function setComp(g, value) {; d& r `# ]" d" o
- g.setComposite(AlphaComposite.SrcOver.derive(value));
2 V* B" ]7 J1 J9 \: R9 x5 q, ]$ ~ - }
复制代码 * \( L! s* t) ^8 W
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。, k7 u7 V4 X) L. h
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; E& l% Q/ U0 a: k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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