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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。5 q3 |9 D4 T2 u) X% P% s
- importPackage (java.lang);
2 ?( P6 o- q4 v0 b5 B% V$ z0 M - importPackage (java.awt);) J2 W/ V! ~8 W; M# L% `% B- M- |
: v$ C; {# B: e3 Y' G- include(Resources.id("mtrsteamloco:library/code/face.js"));) r- g/ Z: d% |; s; c
/ W( X+ X1 D3 h4 Q% N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 z( K8 L. D1 O
- 8 E; O" x% |& ^. T, L" s1 |
- function getW(str, font) {
# f' J- w" u9 z4 u4 T; _* U$ } - let frc = Resources.getFontRenderContext();8 V* a) S& O% ^( b/ I
- bounds = font.getStringBounds(str, frc);
* l: v! s! s* J) h' K z - return Math.ceil(bounds.getWidth());
$ I4 b* q w8 d/ |/ r' { - }
% z* v7 {& H0 L# N - 4 L5 T$ O8 y' U! A8 K* F; Q
- da = (g) => {//底图绘制
( p! p5 Q" m1 r* q1 b$ {! i - g.setColor(Color.BLACK);
+ X: P# S# o. H" }! s- p, g - g.fillRect(0, 0, 400, 400);
2 g1 X6 N' y- ~/ j" Q2 n - }
; P8 X4 Z- E* z
7 H- I5 o" w8 {, m- db = (g) => {//上层绘制
2 W9 T4 N/ h( T) u7 g3 D* U - g.setColor(Color.WHITE); Y# q( I3 j" m
- g.fillRect(0, 0, 400, 400);
$ o: k7 N& N4 J' t( V8 g - g.setColor(Color.RED);" g) {* J) |0 h! y
- g.setFont(font0);
. }( \) P( m! T: R - let str = "晴纱是男娘";
( c- i1 N. Y$ d - let ww = 400;* Y" y. Z8 {+ A1 ^
- let w = getW(str, font0);
9 v; x, z9 k0 e0 s% P - g.drawString(str, ww / 2 - w / 2, 200);' G T" o- K5 k* s
- }8 N0 D2 d$ K+ y- c7 v% s" L, [
- & A) M' S* q/ _5 T2 B
- const mat = new Matrices();
( u+ k+ w* i& V. s { - mat.translate(0, 0.5, 0);7 n1 ^$ d, D: k. a9 b* \: {
- 9 L9 d, J3 R$ z* O" n2 I, e, R0 R
- function create(ctx, state, entity) {3 W( I" y/ B7 e* P
- let info = {
' e4 W. R% R9 T1 x - ctx: ctx,
. c5 O: g% s5 E! i - isTrain: false,/ r) w5 R4 \& Y
- matrices: [mat],, d0 O9 U& O8 U3 N
- texture: [400, 400],
9 m* V0 d# v# S% z5 v2 a - model: {" Z/ m% w" m& f
- renderType: "light",
: Z8 _9 l- |2 H - size: [1, 1],
9 N5 j6 x1 F; T - uvSize: [1, 1]) v7 m! U, z0 ~
- }
* ?1 Z& ^9 ?# x# u6 [0 B5 S) ] - }. o! J- }' ], `: O/ _4 y$ }' `% q
- let f = new Face(info);. }" E5 x# L6 V( c) Z/ B5 n w
- state.f = f;
* I, C3 C7 ]9 [3 R3 B5 [& C
7 t8 k5 P' R6 k: c- let t = f.texture;5 A% S2 G2 x$ N) b
- let g = t.graphics;
" ?$ O: Q- |% j( G& g - state.running = true;( ]) D( E0 d6 R Z
- let fps = 24;6 D3 } `( l* H) l$ b% W% o
- da(g);//绘制底图
, ?7 i4 ^7 B: C0 R( u& |! l. H' T - t.upload();
c8 a) O7 }# Y' Y8 v R - let k = 0;6 E! y3 Y! E6 ?
- let ti = Date.now();
" g% R! R& c2 `4 B! u: s( { - let rt = 0;8 @( N8 O5 g+ l, ], w
- smooth = (k, v) => {// 平滑变化
; c; v. \- E: @( m! V - if (v > k) return k;
: X( K }0 F2 X5 E. }" ` I/ N - if (k < 0) return 0;! S3 M3 d* G6 t+ c- R) q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 p& A; A' O% q c2 J. x1 B k - }
3 z# ]2 A4 u( B( g- T! V - run = () => {// 新线程
* D S$ d, r8 B$ Q - let id = Thread.currentThread().getId();
% y6 B5 j* }- H. [. h- n5 n - print("Thread start:" + id);, o& R0 y! ^2 N. ?0 j) d+ F
- while (state.running) {
7 w6 p( J/ h5 X) [ - try {% s$ {) C8 _3 C
- k += (Date.now() - ti) / 1000 * 0.2;3 u( u8 b" Y# k
- ti = Date.now();
* n( d: [* Y' F* X( a8 T - if (k > 1.5) {% x, [- l6 ?9 @* ~0 Y$ G- c
- k = 0;
6 Y) z% D) Q0 ^$ u- H$ M" C - }- _% M- {6 ] d0 E7 n! w, n5 N" F
- setComp(g, 1);
, s/ L2 _! V O7 U3 t4 Q' u) Q - da(g);9 \$ W; y6 i* C: f
- let kk = smooth(1, k);//平滑切换透明度
' R/ I: f7 _3 K+ W8 S - setComp(g, kk);
% x! P; t3 Z3 A- C - db(g);& P: F+ e$ d0 h; H
- t.upload();
4 Q0 K% @$ p9 e! f" w - ctx.setDebugInfo("rt" ,Date.now() - ti);
- W" p. S5 J. b! E* O - ctx.setDebugInfo("k", k);
6 m5 {! }8 |2 R2 h; p0 R8 r) R8 k3 W - ctx.setDebugInfo("sm", kk);
7 B- \5 c9 R4 g7 Q/ \ - rt = Date.now() - ti;1 e( R: G( {' g% [5 p# H
- Thread.sleep(ck(rt - 1000 / fps));& G" l0 h7 z2 I$ B: l* B1 n. h& H% K
- ctx.setDebugInfo("error", 0)
: Y. _" f" P. V5 G7 {$ N8 F0 N - } catch (e) {
' L2 U% \9 K' B* B3 J - ctx.setDebugInfo("error", e);$ Y/ k7 z5 g2 U& a$ m8 j
- }
6 z( o2 O4 ]; n+ H - }: x5 H9 `1 K' X
- print("Thread end:" + id);1 }/ C; M* C9 e1 d1 E
- }3 m& e9 d% W3 v) T$ w. R5 C% _$ e
- let th = new Thread(run, "qiehuan");
3 [( H, j% x/ k3 g$ V( | }2 _; Y - th.start();
( a$ ^2 B4 o, j" j( J0 U - }
) o( b2 K+ V" s* `1 r4 O: r7 o
# o7 `7 T" ^& w! ]* x* A- function render(ctx, state, entity) {
8 u, G3 Y5 {8 a8 C - state.f.tick();2 O* q$ _# t7 o* ]
- }
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- function dispose(ctx, state, entity) {/ I7 H( K: `$ k- \9 A3 t9 [
- print("Dispose");# Z. j2 G( U7 P' L
- state.running = false;
, y$ ^8 Z7 N8 V, k) Z6 { - state.f.close();: s9 E1 x2 E& {6 r. p, T+ s- L
- }
- u3 Y# n/ ?( W \0 p$ \
- c9 s# M. G6 x' f a% b6 b- function setComp(g, value) {
/ |) w- B( i/ b; B' w! s# i* x - g.setComposite(AlphaComposite.SrcOver.derive(value));
1 y' j4 W1 {9 ^* Z9 @# P - }
复制代码 4 V: P6 G' j2 ?
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。& D8 E# j! z' u- L2 S* y
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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)9 Z$ x. X$ y8 b
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