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" U0 v" Q6 I! {- ]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。
' y) s9 c6 X# O: X! R, j% o0 M4 c- importPackage (java.lang);5 z! Z2 W0 o* k( Z x, a
- importPackage (java.awt);
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8 A9 y6 d: D. g- A3 T; o1 y- include(Resources.id("mtrsteamloco:library/code/face.js"));
3 K' _& V |! t9 V% x - 4 [+ Q0 G2 `/ D# K' t# f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 ]8 y: |1 b# a
7 q, A5 c2 a+ a7 L- function getW(str, font) {
3 V2 J$ ?8 k! k6 Z) F5 v - let frc = Resources.getFontRenderContext();
6 q4 y1 B- b5 ~' m( |" ^8 ?5 ^) H - bounds = font.getStringBounds(str, frc);
' N5 C- A4 p) N$ n2 n4 q - return Math.ceil(bounds.getWidth());" y, s, }, N3 K- p7 s7 m: X* B
- }
' W# f3 j }$ g) ~
/ @/ K. G9 ~% n [9 I% K; ~" L- da = (g) => {//底图绘制 ~( ~9 o, a3 L
- g.setColor(Color.BLACK);& J1 d+ C0 P5 {& ^ N6 ]. b
- g.fillRect(0, 0, 400, 400);
, b' \# n. r, A& @ h) N* C - }
* A* _" A* Y7 t1 u - 4 H% ^ ?, Z+ `8 w6 _
- db = (g) => {//上层绘制
% i) _, c; D C0 Q8 @+ W - g.setColor(Color.WHITE);
' K$ t4 q, S- ~ - g.fillRect(0, 0, 400, 400);
/ l* c g% p6 m% l - g.setColor(Color.RED); {% e: q6 B- v+ m& S+ H9 g
- g.setFont(font0);
- A: \7 v+ A* [# [- H# K+ o6 A - let str = "晴纱是男娘";
! t$ `! R! B, y+ i0 g - let ww = 400;9 S$ `' i8 T# i" p2 i7 ~5 k
- let w = getW(str, font0);
3 @. [/ o0 t, s* N$ p( r3 c3 a - g.drawString(str, ww / 2 - w / 2, 200);; _$ g0 ]3 o: v
- }
6 ]3 o$ _& L0 E9 a
- A# c5 ^) D2 k" Y# j% m- const mat = new Matrices();2 W8 W. m9 h& J; i" u
- mat.translate(0, 0.5, 0);
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9 P. Y1 P Y* J5 f- function create(ctx, state, entity) {
B+ k, D6 V. w% @4 y$ ^( G - let info = {. j+ b# \, \; s: f8 d
- ctx: ctx,
& R+ S) C, ^* M: Z! f+ } - isTrain: false,4 s1 g5 {- m, u6 ]" ]+ ^
- matrices: [mat],
' i' p% Z* |% V) ] - texture: [400, 400],
: e. C4 M: X0 W4 H - model: {
1 N- ]: _; Q1 j+ `3 Y+ Q - renderType: "light",
6 @, {: V- o. k2 x- D' B - size: [1, 1],( j6 K* D- D( ~7 z/ b V, P0 r
- uvSize: [1, 1]8 ^& o6 L( G w/ L4 F) e; a( D3 h' Z
- }
6 c. A& c, v1 Z0 | - }
( Y1 d9 w& Z$ ^4 w4 w h - let f = new Face(info);
" u/ P: C F$ I: n - state.f = f;
/ p3 m9 @+ d, r) }2 {
# Z# `+ G, D }- let t = f.texture;6 ^8 |5 t! y. f; X8 p$ Q9 z4 I
- let g = t.graphics;8 p8 R. |6 i# l: ?, j
- state.running = true;. T5 R9 b# ?! b' ]9 v$ d1 W
- let fps = 24;
4 Y2 I: X* r- a& c - da(g);//绘制底图 {/ ^5 P8 M6 L1 }0 c; h/ n
- t.upload();
1 N; q) v+ w8 z - let k = 0;
/ A$ ?6 W6 g; Y" Z0 E9 B1 c j - let ti = Date.now();
) O7 [2 k' A9 f# l- W0 V5 h- Q ` - let rt = 0;5 X3 W. J+ z( b3 Y' v6 R, J
- smooth = (k, v) => {// 平滑变化' H z% a/ ~ m7 i; W3 J0 I5 e
- if (v > k) return k;
" O2 \! F2 B9 O' n0 k1 { - if (k < 0) return 0;
4 g% y9 g+ \( g X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
. [9 x7 r! ~, D" P2 b; \' e - let id = Thread.currentThread().getId();6 O' q. h% U' w, [6 g# \2 ^ b
- print("Thread start:" + id);
; m' h {3 J8 r: b* I4 C& Y' h' s - while (state.running) {
$ Z' Q" f9 Y. ^2 R* k - try {
4 r/ S/ w- x6 F, j. e% ] - k += (Date.now() - ti) / 1000 * 0.2;' y2 T: J( X1 s2 s; C& C1 `6 C
- ti = Date.now();
$ f. s( X# Z \! _+ M3 Q1 K - if (k > 1.5) {
; ~$ M, b3 }: A, M- f* z - k = 0;
4 b5 R" S6 K6 r; e( M - }4 d, H) i- c) j% B4 o; {, u; d$ Q6 E; D
- setComp(g, 1);2 s9 }% y5 x0 s4 E! K% D
- da(g);. v5 o4 ?% l0 o* P: ?6 x: f/ N
- let kk = smooth(1, k);//平滑切换透明度
+ ~3 d/ k6 ?* ^) P - setComp(g, kk);6 M( u8 o5 A A$ C
- db(g);+ i- T8 W" R) i9 j# d
- t.upload();2 w$ O9 X& t# U! s3 Q
- ctx.setDebugInfo("rt" ,Date.now() - ti);, W% K8 w" g. i* e( N8 f+ K9 W
- ctx.setDebugInfo("k", k);
3 W. K) K. x1 i# ]: S9 [ - ctx.setDebugInfo("sm", kk);
7 U7 p8 g& H& @4 ^# V6 a! u P - rt = Date.now() - ti;) }0 X1 f7 q9 n; v6 y& [3 ^8 G. K
- Thread.sleep(ck(rt - 1000 / fps));" } N- _9 N3 n6 x, O0 I2 X' _
- ctx.setDebugInfo("error", 0)/ S- T( L, s6 ^! q- m; z. [) h5 \) d( ?
- } catch (e) {
, t: G/ }" }! f6 \- H - ctx.setDebugInfo("error", e);, Q3 _8 T0 A' q2 [0 C+ @. ]6 S& U
- }
- \- y% M2 [/ B Q) k% F) f! v0 u, m - }
- }! f" ]+ F; p' W( P% i0 ] - print("Thread end:" + id);
7 S# G* e! |( o/ k1 Q - }
2 Q0 P" I% x1 x, R2 s! ? - let th = new Thread(run, "qiehuan");& K7 G; | T' ^8 K" H0 y: e- ?
- th.start();7 [& f+ F! F0 Z. G5 c9 ^( P
- }
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! F( M+ q7 K- x- i4 }% p3 x# ^- function render(ctx, state, entity) {
" y% B; }* J) [* _# M' M+ q+ f - state.f.tick();
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- , R6 |" V( ^8 F5 f
- function dispose(ctx, state, entity) {
- z; y7 y3 X# e* B - print("Dispose");
; X* ?2 }! l. g1 i. F) q* C0 [9 c - state.running = false;
! E: l8 } [1 W2 O - state.f.close();6 }( w0 G( `9 `. X+ R5 @0 A
- }
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3 j" f. h& H5 O4 B- function setComp(g, value) {. S: d4 y- T1 Y) z6 M
- g.setComposite(AlphaComposite.SrcOver.derive(value));
; q; U# F- J. `3 ] - }
复制代码 ! A- k2 C2 w3 S# K* k7 @
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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' }. R: l* q; U5 J% @( L- H( H: H
$ W" Q1 X% U2 c2 f6 W) } h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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