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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。8 C' i# O3 `; g0 d7 J+ I: y
- importPackage (java.lang);
9 j! x, `! b; p& O+ A: A4 c' x( i - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. N V8 E) t3 N; [4 ]2 u# ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) M" f& |# z8 f7 F K: P
- & A/ c0 Q6 I, ]/ |- Y. v
- function getW(str, font) {
2 l- [' v& m) l. M3 `9 h) Q, S - let frc = Resources.getFontRenderContext();
, w$ Z) J; |6 p* e- N - bounds = font.getStringBounds(str, frc);5 d) ~: x' ?8 ~1 W" w
- return Math.ceil(bounds.getWidth());
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- : R! |5 y2 _( Z
- da = (g) => {//底图绘制- z1 K3 v5 K a* l3 z2 E
- g.setColor(Color.BLACK);
( j& c7 Z7 E, L; m - g.fillRect(0, 0, 400, 400);
8 `8 T0 S2 O8 d1 v* M3 B: O! W - }. z5 e- ^8 W) t6 ?4 M7 {4 o& Y! _( y
7 v% X$ @' c6 d, @- db = (g) => {//上层绘制
# l5 I/ @8 B* g6 p: d - g.setColor(Color.WHITE); i" _+ }5 K( c' O: H& V7 j
- g.fillRect(0, 0, 400, 400);
. ]6 N; o; v- P V9 N - g.setColor(Color.RED);
0 u4 _; u9 F4 n# Y( |0 A5 E: E - g.setFont(font0);
% f) l2 @4 R, M! m% N' C' y - let str = "晴纱是男娘";8 R% r* U( V8 ~. w* s) f6 s
- let ww = 400;
8 k; F6 Y. _7 X& d" ?9 F( K+ ] - let w = getW(str, font0);
, J; t) B! x8 @+ ^ - g.drawString(str, ww / 2 - w / 2, 200);/ U; e( i E5 Z
- }; I" l( k2 l' n7 F4 f
. d9 C" C H& f8 T$ H( I4 ?- const mat = new Matrices();: e( S: C% U# u! V0 X5 D9 `
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
7 I" {. E2 U) ?) e - let info = {
% M$ q5 M e' j - ctx: ctx,
& R# t; b* C ?; d! s6 \ - isTrain: false,3 e; z! b" G/ w7 p4 o% `
- matrices: [mat],
% Z" Q0 N' r1 g( x - texture: [400, 400],0 R# w4 Q' s2 ^- z! z- ]# a
- model: {
/ O3 y" M* U' G& n - renderType: "light",3 }8 e0 w5 @2 S$ I" b; t& h! z
- size: [1, 1],
' Y6 e. I5 P% ~5 c7 ]/ j - uvSize: [1, 1]! f4 E' `! J) n6 K3 i }& k. a
- }
J2 ^9 L) r$ a& Q7 ~+ i - }
* P6 G. J0 \4 _ - let f = new Face(info);6 V* b i0 P+ q& G
- state.f = f;/ Q K5 L, C+ F, `6 t1 A9 A: h
- # S+ L" Y. [0 n3 X$ e8 [% c
- let t = f.texture;
! q) d: z# H8 N" X, W @ - let g = t.graphics;. S8 c5 N( p6 G. A, N
- state.running = true;
" v) W- M Y; H$ U8 z/ j- g, w8 m - let fps = 24;3 Q' f; Q! |# {, Q( z& R
- da(g);//绘制底图# V) N( z$ _, D# ? R( U1 {- t
- t.upload();
, Y1 C8 ?; V* q: _9 ~ - let k = 0;
8 [" m+ M& q7 j - let ti = Date.now();3 i3 c4 I! R' [' y ^) h
- let rt = 0;
. k& j* `- y2 z" S' ^; Q - smooth = (k, v) => {// 平滑变化
+ k1 U& t# g$ l+ Q - if (v > k) return k;
1 o; c5 x/ Q7 n* E# Z& b - if (k < 0) return 0;7 Z, ]; s/ M3 l
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 x0 K( F+ u+ }. Y
- }
; m0 P; m$ u1 N! G; b+ Q8 N$ ] - run = () => {// 新线程/ F0 s, M& G3 J& u7 a& k% ?; [" Z
- let id = Thread.currentThread().getId();# c3 Y8 j0 b' ~
- print("Thread start:" + id);' H% t; ]" k0 x
- while (state.running) {3 d- {0 R, D2 u- A0 R! ^* N
- try {/ ` m, s5 u$ F" N* N. p
- k += (Date.now() - ti) / 1000 * 0.2;
: b' `4 h. v6 a8 i" ] - ti = Date.now();# \( u1 a1 R2 X, w+ `; B$ X& x
- if (k > 1.5) {
4 J2 t& N: J: g - k = 0;
- F: |+ F p P7 m2 D - }" R& @* q, U2 w
- setComp(g, 1);
$ T, o$ L+ P/ Y W - da(g);
S5 O0 N: |: q% U, M - let kk = smooth(1, k);//平滑切换透明度
+ G) B! V: w3 L: s3 k; m+ Z1 I - setComp(g, kk);$ x3 r- Q' Z8 S; J
- db(g);7 j2 X* m% \$ `6 l# f
- t.upload();6 H' q* ?0 A5 |1 y1 t: G
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& r4 G p& U# }$ Z - ctx.setDebugInfo("k", k);
5 z" X" x0 F8 W' o - ctx.setDebugInfo("sm", kk);* \& @0 o- m# K- x: o2 M$ P; N
- rt = Date.now() - ti;
( V& w9 q9 R( n9 H) |/ s1 K1 E7 P, _ - Thread.sleep(ck(rt - 1000 / fps));9 s5 P2 A! n; a: j
- ctx.setDebugInfo("error", 0)
, q4 G' A% q2 w2 t7 w d3 ~ - } catch (e) {7 M, |5 ^4 l0 o' K
- ctx.setDebugInfo("error", e);7 [ L' P0 `; V( b) X+ O
- }
& v E' V2 @* U! C - }
, C0 x0 ^2 `9 r# H ~ - print("Thread end:" + id);; b6 |* g$ ]+ d) o% C1 t( a
- }) F& v: i3 h* o8 S! b
- let th = new Thread(run, "qiehuan");
1 l j, q4 a" o5 K8 R6 B' A - th.start();# R' s- [; n8 ?& T$ W' O: _
- }
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3 b! p# F, D" {6 D! ~, Z8 V# b- function render(ctx, state, entity) {- S# w5 i. `; a; t: t9 K9 S
- state.f.tick();# D7 n, J% @' W' t7 H8 }
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$ H& r' V ~8 U1 T- function dispose(ctx, state, entity) {
/ ?$ }" o: ?, I+ J% Z% P - print("Dispose");
/ L6 i9 Q) Z5 c/ ]! z - state.running = false;) O8 j3 {' u# s- G C5 b6 @% S
- state.f.close();+ R) F) Q$ Y; h: X" C P& h
- }( I- ]2 R; b A: s. G2 S* O
2 W9 d+ Q T N0 e) m, l9 Z- function setComp(g, value) {6 H/ L* Q/ ^. f* S9 V1 r
- g.setComposite(AlphaComposite.SrcOver.derive(value));
0 Q+ T& y0 a" y4 s5 n& B% e0 e' |/ c - }
复制代码 c; g; e2 d& p& d3 t" z! i- P
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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# ~6 ~( N" C0 p7 x @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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