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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。! W: ]& X$ r3 O; M f2 P( Y6 A+ L6 K, p
- importPackage (java.lang);) Q: \" X4 W% r6 Y
- importPackage (java.awt);7 Z9 N. P9 t. E$ F
6 f! N) J, Q+ ?# ]8 b5 {- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* B1 r, a9 E6 a% z, e* t, K
. j" ?" x+ p0 {2 W. F1 d- function getW(str, font) {
" D v* m2 m' ]1 P, x) y - let frc = Resources.getFontRenderContext();
+ D" q1 q0 D* G& ?- i. v - bounds = font.getStringBounds(str, frc);5 e; q' Z& o, N6 A
- return Math.ceil(bounds.getWidth());% H2 C3 Q% }9 r' [6 S3 ^: ^
- }$ n- r _+ Q8 D
3 S: o' M* G P: p1 K- da = (g) => {//底图绘制3 `' A; X9 A$ {4 Z7 Q4 j
- g.setColor(Color.BLACK);
2 e0 q* Z' M- x L( `& ~0 S - g.fillRect(0, 0, 400, 400);
" k' Y i* }9 ^9 B J+ r3 i - }
$ X0 E9 y4 x _1 h
* s% _% s% B( x4 |- db = (g) => {//上层绘制
. t3 r1 D% j% u$ | - g.setColor(Color.WHITE);
. j" \# S/ \* W c - g.fillRect(0, 0, 400, 400);( N6 d! e) ~9 h x! c- K7 T
- g.setColor(Color.RED);: n+ u' s5 U3 @0 U) G: v
- g.setFont(font0);. l- f2 ~& e( J+ m5 p5 Y! V" [
- let str = "晴纱是男娘";
/ g# }! u! D/ B, ] - let ww = 400;
4 A9 S9 ^# b- O9 H - let w = getW(str, font0);
( M/ n( o8 B) `; k. U7 O* q4 O - g.drawString(str, ww / 2 - w / 2, 200);
; B( R" [# m% i0 }$ j1 b/ e. G - }
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G% d; Z) Y5 k5 p4 Y" _5 }9 B- const mat = new Matrices();& R0 a/ s2 F y% z/ G
- mat.translate(0, 0.5, 0);
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% |% }" l% A; f; z0 Q$ ^- function create(ctx, state, entity) {' R& S M$ y+ z0 M2 o, Q
- let info = {
% O2 w5 [0 N4 n% A& h. U( j - ctx: ctx,
- q3 }+ Y4 b1 p/ S: }0 z5 [ - isTrain: false,
" t# {9 e; x3 Z7 {# ` `) y# B' B8 ? - matrices: [mat],
2 o) e% L, Y' I& F - texture: [400, 400],. H4 Q a- Y2 d# i4 a8 T
- model: {
' X: ~% M- k3 z' U - renderType: "light",' H6 x0 k' E+ l. Q3 i
- size: [1, 1],- r- M" T/ ^( \
- uvSize: [1, 1]
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- }/ d* h6 h9 ^. L. |2 O7 k& m
- let f = new Face(info);4 v7 r* T6 C. P4 E+ z4 O$ e3 S
- state.f = f;
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7 W& e! a1 q3 E8 D5 ^% g8 A- let t = f.texture;
! X7 s1 {4 x$ {* o3 q0 y& H; X - let g = t.graphics;
) K5 d: \( X1 W* }2 V* q - state.running = true;
* }$ Q: y4 d2 s- ]3 s. H) G: `1 w, ~ - let fps = 24;
4 |$ d. q, S% r3 I% U - da(g);//绘制底图- g0 P! Q: H% W7 U! Y9 y/ R- O
- t.upload();
# w$ {9 |: C- r/ Y& P% i( d9 o& C - let k = 0;) o8 `1 w& i4 l( V1 r: e4 y c/ e
- let ti = Date.now();
7 d3 n/ C1 m! O J- F5 x - let rt = 0;
4 v1 u2 R) F0 v$ m+ s, I - smooth = (k, v) => {// 平滑变化
0 `$ k) `- H8 x* }. L# z - if (v > k) return k;
) Y" g& c& l/ X0 b- E, c9 `% P - if (k < 0) return 0;
! n' W- U( |: ^& w- z2 L - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
; }5 G4 L1 c; Q4 e3 C: ? {% R/ W - }9 \ Q1 T/ U9 w( ]6 B |- b W
- run = () => {// 新线程
. F1 M2 b' ?4 w8 c" m( S - let id = Thread.currentThread().getId();6 R( i4 J/ V# z
- print("Thread start:" + id);
2 |8 a( T* n. [; a3 G - while (state.running) {
" g) e# M) a/ i4 S M/ ^2 R - try {5 ~$ h* g8 A' d4 ]- e4 N$ ~
- k += (Date.now() - ti) / 1000 * 0.2;
8 c* Z# z9 [: s4 l% y/ H* j) Z0 T. Z - ti = Date.now();; ?2 }0 O% ?" K7 c
- if (k > 1.5) {. U; H9 G+ r0 V% Q$ T- x
- k = 0;/ L5 A7 x; z) ^) n
- }
: W( O* T2 |& s: _1 z# U - setComp(g, 1);
2 A( L8 P- J# }1 f% k - da(g);
7 A0 x8 M4 p8 k$ h6 [9 R/ V - let kk = smooth(1, k);//平滑切换透明度5 V# {" ]1 w( I3 u" P! u4 W( t
- setComp(g, kk);
5 V) G& u& A0 u% a: h - db(g);
2 c( h# j" x5 b0 I& P4 j - t.upload();: J1 k' j2 R) |! D# f# v
- ctx.setDebugInfo("rt" ,Date.now() - ti);
; _# n& k: K7 j8 n$ I - ctx.setDebugInfo("k", k);
8 P) ?6 T3 M# \3 W7 F" E - ctx.setDebugInfo("sm", kk);9 g+ W1 A A4 }$ o: f+ N
- rt = Date.now() - ti;4 o. c* q# Z: @0 U5 s( r- {+ K2 B
- Thread.sleep(ck(rt - 1000 / fps));
6 U+ ^; q' j* G P! v5 J - ctx.setDebugInfo("error", 0): ?: M. n' Y$ B! z) g T6 j: L
- } catch (e) {1 i& ~" P, C& j5 v5 o1 \
- ctx.setDebugInfo("error", e);
. O% ?* L( V* W8 k6 l5 z1 f$ H - }
* t: I# s; Q8 \ - }
. f$ V! @$ }: N6 x - print("Thread end:" + id);
9 u, |+ ]0 s4 a) t( X - }
! C2 w c4 O% H - let th = new Thread(run, "qiehuan"); Y4 I* w% _) N6 [3 N
- th.start();
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' q& ~3 p7 I c. e& w4 x: W- function render(ctx, state, entity) {3 V( B- ^' S7 }% A9 ^
- state.f.tick();* ~4 W& A+ B/ ~+ ~ W
- }
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6 F3 _' `0 K9 m6 k( ]. \! a- W- function dispose(ctx, state, entity) {$ {% a8 n" f5 F" K0 a, b4 l
- print("Dispose");
7 p, _0 q+ h2 S* y! e - state.running = false;0 o( R/ L! w% D( o% `
- state.f.close();
$ a% |1 K7 b z3 N% u - }
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- function setComp(g, value) {3 a# x0 \! M1 F8 ^
- g.setComposite(AlphaComposite.SrcOver.derive(value));
$ U9 w" Q- X; j7 C& G7 I: z) a$ p - }
复制代码 + e) J2 d7 [+ R& f
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。7 [$ c0 N7 p6 |2 {
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( x" Z& B1 s+ R7 ^顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). u8 L- T V3 y8 r g
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