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' ^% K5 r5 O& ]" a) K3 O7 X1 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。
: p- q1 ?4 H# H0 @. k8 ]- importPackage (java.lang);
; N3 Q& Z# M& v4 `' {9 S. ~+ F - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
4 ]. R* y% C5 A R0 w" {
! V3 }6 B. h; o9 F6 R- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ t- W! o2 j( Z$ M( ~4 {/ V
8 H4 T# _; K) \6 D. C- function getW(str, font) {2 J( t0 n) N: N# d
- let frc = Resources.getFontRenderContext();2 ?- ~" C! k6 i* v( I
- bounds = font.getStringBounds(str, frc);" V I- U+ q5 G+ r: a
- return Math.ceil(bounds.getWidth());9 }% q6 f9 y% ~4 i5 w
- }
& v: y; q. K0 @2 K, C - : D% S- c$ U2 |2 i& Q
- da = (g) => {//底图绘制
& Z( l; h1 i2 q, M! y7 L! D - g.setColor(Color.BLACK);# @) Z! D) `; e" N
- g.fillRect(0, 0, 400, 400);
) Q6 |& I" G7 r* a+ h2 V - }. @0 q. ~" r5 P# t
4 P6 g& w0 g! H2 T# `. F& h- db = (g) => {//上层绘制9 V4 P2 _5 \/ R6 h
- g.setColor(Color.WHITE);
4 k$ k4 c5 ^/ x. P! L - g.fillRect(0, 0, 400, 400);
! n( x$ n# q' T7 g - g.setColor(Color.RED);4 R$ ~5 ^" F2 C& D9 |
- g.setFont(font0);
* r" o* F: P$ a' D: Z, }( q) D; { - let str = "晴纱是男娘";
3 j0 W# A' u; |! w - let ww = 400;) _) p5 \% j G2 P1 N: O0 W5 L7 C: C
- let w = getW(str, font0);
; m6 B5 N+ f5 ^" _ - g.drawString(str, ww / 2 - w / 2, 200);& P. i1 I* z+ W
- }
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6 D, _9 z1 }# T! c) m7 l- const mat = new Matrices();
/ e, P5 _6 F8 Y$ _ - mat.translate(0, 0.5, 0);
/ w$ z$ ~( k) [( W0 n$ _! {
2 f; h$ w/ U% L9 r! i- function create(ctx, state, entity) {' ?% B4 Y! i6 T9 V
- let info = {
5 L+ N3 i' i4 D' ~5 D, |* y - ctx: ctx,
9 v/ @1 h3 J5 V/ w2 z( d5 U$ n - isTrain: false,
% B4 X' e2 y, O - matrices: [mat],
# z3 o L7 n: j8 C5 k0 q - texture: [400, 400],# G$ A# Y. J- d9 F0 B
- model: {3 `7 }1 U4 l; x9 G1 G% ~1 h0 o
- renderType: "light",
/ ]2 z* N6 j G$ F a# E6 E - size: [1, 1],. o" ]4 v' ~5 X" @1 y; W$ `
- uvSize: [1, 1]: Y4 T$ |, n) Q! V
- }) S* A0 H2 a* j0 {
- }' x/ `) F% t8 V0 V
- let f = new Face(info);- u4 l* t, c2 f: a) a6 B) `
- state.f = f;3 Q6 w1 c7 h* R
- 2 L* h, R$ I5 m3 C L
- let t = f.texture;
7 v! M8 G% A5 U" g, k - let g = t.graphics;
! @1 z# v$ e) |& ]" r( n - state.running = true;
# R- h# L) [2 g - let fps = 24;
3 e) `+ i# v0 F' h5 b - da(g);//绘制底图
+ y' g& j$ B" E+ ?+ Z1 e6 u4 G- ` - t.upload();
^7 f& s) B& k2 g G - let k = 0;9 y7 r r3 Q) h' ]$ I# o4 g
- let ti = Date.now();" _" `9 m; C3 W7 G* d0 a
- let rt = 0;* @/ b" p+ B/ s7 X
- smooth = (k, v) => {// 平滑变化
& y6 ~& M5 E5 E0 N6 R$ Q d - if (v > k) return k;
* u- I) k* V* f4 R: ?6 } - if (k < 0) return 0;
, o. W' i. d# @; f7 F/ L/ T. S - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; k5 P2 \3 Q7 D
- }2 p" n: a) W6 b* Q' [, g, r
- run = () => {// 新线程
2 C, P! h/ v, t- R" Y: k# c' E - let id = Thread.currentThread().getId();' i3 ?& y" o: ?( j) B% n
- print("Thread start:" + id);- H3 p4 A) U6 a+ L5 W. R
- while (state.running) {: I0 P* Y/ m4 Z) ]
- try {7 X! ?- d5 W; {$ _6 J: N
- k += (Date.now() - ti) / 1000 * 0.2;: W1 a) ]% t3 g: Q
- ti = Date.now();1 x) I, ?( E1 J
- if (k > 1.5) {
6 R" R$ Y2 F/ R) o4 w - k = 0;7 T1 @" U; P# N& T M4 a7 a# D, o
- }
4 [3 C5 A7 a3 W7 B3 d2 f! V# G$ i' D - setComp(g, 1);
) Z2 g% V7 G8 j6 `8 I - da(g); B% _$ C; a' ]' ^2 M
- let kk = smooth(1, k);//平滑切换透明度
* ?0 Q: K2 K* [5 { - setComp(g, kk);& ]& y. h! M% e: z
- db(g);- M6 e$ B+ o( g! u- j. O. N
- t.upload();* x9 q, r2 C8 v$ U
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 F' ]2 r' \& r; J! G
- ctx.setDebugInfo("k", k);; M" U/ V* L% ^& F! C, W
- ctx.setDebugInfo("sm", kk);( i( `" Z- Z# \
- rt = Date.now() - ti;: @) A2 t2 L% u. L4 |# d
- Thread.sleep(ck(rt - 1000 / fps));
' ]+ F6 x+ D4 C( o - ctx.setDebugInfo("error", 0)9 ?& i9 F' c( A' S( f/ f% _
- } catch (e) {1 j1 u2 h- A8 K8 Y, u
- ctx.setDebugInfo("error", e);! R4 S2 Z2 X7 M3 k! p$ ]% p& Z
- }
' i% m3 Q) ]7 J0 x7 v9 t7 [ - }6 p0 o$ e; J, @; F+ m9 Y' r
- print("Thread end:" + id);, b/ w4 J) m3 S6 O; t
- }
+ y1 ]* a3 k3 x, H - let th = new Thread(run, "qiehuan");
, h$ J7 g2 |) T9 L" X4 C+ z - th.start();
1 p/ K7 I% L1 [1 G( t. f+ P - }
* P' T" u8 i u) `
# Y" X8 _: v. A, c! L+ c) I+ G- function render(ctx, state, entity) {
) Q/ G( e) J1 c5 a' b" h - state.f.tick();
) s# P F% A/ [& Z - }
% m* T: E: x! S* m% P - $ S8 B+ T: O9 p+ p4 e% P. z
- function dispose(ctx, state, entity) {. i3 Y' ?& s& e
- print("Dispose");* b$ i0 `+ H" I# x, f
- state.running = false;% e- n0 R& t3 ]1 Q% \* Z! x2 L( `
- state.f.close();
* M# s9 {2 c' |3 k5 y - }
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- function setComp(g, value) {; a$ {3 F. q5 G1 G5 j. t0 R
- g.setComposite(AlphaComposite.SrcOver.derive(value));% y/ p4 ^; @7 A. l
- }
复制代码 X& a& {5 |9 J" n! D0 z" S6 m$ Z& `' 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)
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