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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。
* `4 l1 V- h* m' _- m- J- importPackage (java.lang);
; \& g9 W2 U* K% y - importPackage (java.awt);
! M3 E9 [* d. N% C! z
" d4 z. [2 e+ E& \3 C* `- Y I- include(Resources.id("mtrsteamloco:library/code/face.js"));6 \$ Y, {4 ]" D" r' n; V
- , K7 l) v3 J% c9 J* d; Y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- ~6 j8 Y+ A& |5 z& c' ~ - 9 C7 `4 F7 C4 z( i
- function getW(str, font) {1 q- {0 k; z J5 ^1 _7 N
- let frc = Resources.getFontRenderContext();. W/ L+ r7 |* U8 b3 \' N
- bounds = font.getStringBounds(str, frc);( f2 F$ [/ i0 v, G4 M
- return Math.ceil(bounds.getWidth());! ?8 `- ~1 k/ e# f
- }
' b) `" w1 `7 `2 a4 K4 ?+ ? - 3 u$ E( u7 y3 d. c. k/ A+ A% c( v
- da = (g) => {//底图绘制% Y) w0 _$ o2 _. Z; s! J
- g.setColor(Color.BLACK);
( N# M. J6 U; y- r" c8 s4 e1 p - g.fillRect(0, 0, 400, 400);
, V" [7 V. \" a - }
4 k$ U J+ M9 r2 g3 {2 c
% o- N9 ?$ Y! Q/ s, w- db = (g) => {//上层绘制: L, E3 @1 j# O" x1 T. h2 `& i
- g.setColor(Color.WHITE);- N2 j* C8 ^7 A
- g.fillRect(0, 0, 400, 400);, ]) d8 S2 H3 [9 d, x! A+ n
- g.setColor(Color.RED);
6 s) f- Q0 j3 ?4 e. Z! y7 m t7 ] - g.setFont(font0);1 L# }1 C# @# I8 s% P
- let str = "晴纱是男娘";( x3 f8 ?- ~+ A8 \
- let ww = 400;3 _9 x! w) I1 ~& {, J1 U4 D, }! u
- let w = getW(str, font0);
/ b" @5 s' l- a( X1 W - g.drawString(str, ww / 2 - w / 2, 200);. y# U' E2 {4 w: s
- }7 w3 c7 K# N8 h d C/ a) u
- 9 h& A& T( H) Y) Y" b2 _
- const mat = new Matrices();6 N/ r0 C5 ^+ k a3 a3 P7 W% V/ N( K1 F
- mat.translate(0, 0.5, 0);/ `5 t" W+ K. V, Z* h
, I* T- Z0 W) ^; |1 T* h6 _2 O$ Y- function create(ctx, state, entity) {& G {" n! j8 K3 ?4 B* s. z
- let info = {+ e' C* t) [ x' p# \: ]
- ctx: ctx,7 a1 ~* v- X& a, S' R
- isTrain: false,
$ Y z) `' e+ {6 _8 ^, W! d/ _. q+ ~ - matrices: [mat],. m1 g" b- x, R$ j" a% b4 r
- texture: [400, 400],& y3 Q$ } D+ ~; @. ~
- model: {
# P( o9 H4 ?1 C7 ?6 l - renderType: "light",
( }) [$ \0 U' a- v0 l - size: [1, 1],
/ z4 n d# ]* v8 S - uvSize: [1, 1]
% s" n. ]% ~! `# o% t1 I9 f C - }$ X& ?7 H" f3 g6 n4 }& V7 G
- }
3 `$ X0 Q3 t+ Z! [! [& x - let f = new Face(info);
" ?- r# b8 n( n# S8 ? - state.f = f;
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7 a% y4 C7 z; A( X N! A2 F- let t = f.texture;
$ s7 [8 X. ?: T$ j! { - let g = t.graphics;4 R: f- [, l/ E9 ?
- state.running = true;
1 N- j: w% O2 \: h, w- C: I3 ~6 O; f - let fps = 24;% T3 m9 o0 y! k& {4 e* |& L
- da(g);//绘制底图7 @6 q1 U. T- J6 {. l" f0 L
- t.upload();: j6 m2 ^2 J; w- E
- let k = 0;. d: x3 Y o' J3 `& y( n3 A7 s
- let ti = Date.now();- _: ^2 g# q/ y! ^4 H5 C- R" J
- let rt = 0;
. T* K1 @, b9 _% ~' F - smooth = (k, v) => {// 平滑变化5 ^5 e0 s/ \! P6 P7 t
- if (v > k) return k;6 p: G6 \: `" P
- if (k < 0) return 0;
: A9 H- i( l- ?1 C8 C8 Y5 g! r - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! E" V; X% k5 u- u6 b3 X6 |% N5 w - }
% c- i9 X$ u( M, Y - run = () => {// 新线程7 t4 Z# ~; e3 x' e
- let id = Thread.currentThread().getId();( `, H: J( k7 G$ h) u; x0 n; R
- print("Thread start:" + id);
6 W: @) {( l, ^) {* ?3 b: i - while (state.running) {0 Q6 k8 F" V) w/ `% X( l6 Q
- try {3 X. f; Y( t6 d8 P+ k) z; `$ W
- k += (Date.now() - ti) / 1000 * 0.2;1 P7 W0 Z( \" R$ w2 J
- ti = Date.now();+ t4 P, {0 }! X$ z' U# l
- if (k > 1.5) {
- ~* R: g# \ S' C( n - k = 0;7 W4 s4 e# _5 S1 Z( d
- }
5 d* Z5 j! K. b2 ?; S; F/ @ - setComp(g, 1);5 c- Y6 {$ y4 R2 ^. G! r% ~4 I
- da(g);
7 j5 j3 T4 _$ v3 u# s7 S$ C - let kk = smooth(1, k);//平滑切换透明度
5 f* \- c0 H2 R2 [ - setComp(g, kk);
9 d' r- s' L2 h/ v' k - db(g);
6 i' c2 A3 Y* m: c - t.upload();
' a) e' ]& b6 @& l7 o& q2 K. I - ctx.setDebugInfo("rt" ,Date.now() - ti);' u2 ?# Z& z& p
- ctx.setDebugInfo("k", k);
! z9 l* f, C% v4 W8 t9 [ - ctx.setDebugInfo("sm", kk);
2 w6 p% n$ e( P( B4 \ - rt = Date.now() - ti;3 m. c/ @& A% K$ J0 F3 i
- Thread.sleep(ck(rt - 1000 / fps));
* P" H8 c/ p% q6 [ - ctx.setDebugInfo("error", 0)8 }! p% Z3 C, f- E
- } catch (e) {
) x7 N; D8 N) C" O - ctx.setDebugInfo("error", e);4 f- X2 ]. V7 u) r- E9 P) D9 {$ {
- }0 @8 ?* \8 d% d+ s+ l
- }8 R; x; Z; H% b. ~
- print("Thread end:" + id);
+ d; ]% X& P8 M2 z7 i - } M$ c8 M5 F" \9 J7 {# }0 @
- let th = new Thread(run, "qiehuan");
5 ^) c9 }1 R3 n0 i. }& K; E - th.start();
/ g) c. d* ]( g! P - }6 W& |/ _8 }, y
- * A+ z+ s$ B" X& e
- function render(ctx, state, entity) {8 N* B! p) e: ^
- state.f.tick();
; j, [3 s( g+ I$ j: h, E' s - }
) }+ Q% c9 F( Z9 h; T# K K# T
$ S1 s; ~4 X1 l0 F- function dispose(ctx, state, entity) {/ z" u1 ^: T. ^3 y. W
- print("Dispose");
5 j: M3 _2 R5 a G - state.running = false;! S& Q) U# C+ W, M* B
- state.f.close();
; ~8 \" x# g1 I' Y - }
: U" L" [; e" h. o) p
, m9 k* B# J3 M2 I0 p- function setComp(g, value) {2 A: X* E+ W3 W) V
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 ]" |/ z3 A' I# g+ a& P
- }
复制代码 + K( h1 `9 o! M" d1 @6 X( T
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。
# S5 n) H3 g5 w+ N. x; y x1 \1 M9 ^- y. j0 L" e
9 E1 t/ N9 M+ V1 u9 F8 I顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), O7 d8 w9 `5 p
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