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& l& W* }7 @2 V% B% ^! p5 L; U" ?- m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。
6 O/ |5 {4 A- f- K i ?, O- s, U- importPackage (java.lang);+ `. q9 A+ b, Y3 Q8 C
- importPackage (java.awt);" [; H: u7 \ c$ i/ h& z
8 X7 e G* D0 _7 v& I5 r* _ q- include(Resources.id("mtrsteamloco:library/code/face.js"));8 J% {1 o6 i z1 S: n: ?+ v
; v7 ~9 P& s9 g: A' q6 K- J; b% l) v- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& |! H, l* e) y9 ]
- 2 H; V4 F* M& b" R
- function getW(str, font) {1 a3 V- Q! j* i0 L4 @3 C2 g9 ~
- let frc = Resources.getFontRenderContext();
6 I& U( T6 p: S! u, k0 [ - bounds = font.getStringBounds(str, frc);; V/ z0 a" @& a1 @
- return Math.ceil(bounds.getWidth());
5 L A( v2 m1 V/ \% W" ~ - }
9 J ^0 ], o( Z+ F% C. n+ V - 8 o9 P5 C( J4 L: l0 |
- da = (g) => {//底图绘制% r6 q& Q, L! q( }" o( }' u! q
- g.setColor(Color.BLACK);
2 I9 u4 s6 |, h" O& f& x - g.fillRect(0, 0, 400, 400);
5 L$ ~$ J; i: J9 H ] - }
4 h! |1 U; V' |" J/ q( R3 x - ' a4 ?0 b7 Y0 N& N% |2 F
- db = (g) => {//上层绘制2 m' u+ T3 [9 Y9 F4 Y8 Q& Z( |, ]
- g.setColor(Color.WHITE);3 T9 P0 O3 T+ @2 Z! V' q7 @4 w
- g.fillRect(0, 0, 400, 400);- ^ ^% |" q; Q0 x. `
- g.setColor(Color.RED);
# R4 A& P& S6 B( F3 g6 ?$ _ - g.setFont(font0);) S4 \7 u+ R/ M C, _9 q
- let str = "晴纱是男娘";$ P0 ~8 p" a; w+ e# H/ n1 L0 l9 L
- let ww = 400;) k0 l- c2 q5 R& ~" }" I
- let w = getW(str, font0);
/ j4 t6 k) \/ X1 i3 v6 C( C - g.drawString(str, ww / 2 - w / 2, 200);- W/ J% Y& A4 J4 B9 T6 k$ l
- }
5 z* g' f9 R- x0 f" ?8 D - + |. h% s; t' I, y; m
- const mat = new Matrices();
5 p( S5 ~2 n W. u& H, v7 v6 I" u - mat.translate(0, 0.5, 0);: Z; w' \( ^1 s- Y9 B
; }/ v( F& k' K! l$ y% G4 Z& ~' w- function create(ctx, state, entity) {; q" Q3 i0 w! T
- let info = {0 \9 r- D# _* B3 E$ Q2 B6 w# c
- ctx: ctx,
c' k; k& {7 E' q3 a) ?2 R% G! B - isTrain: false,+ m5 T) Q/ j9 Q6 i. p+ ?
- matrices: [mat],
3 N4 J0 Z6 M: K( O2 d5 _- M - texture: [400, 400],: }" T9 v; }. _, q% F6 D
- model: {
2 N( y/ o5 h6 R, }# X7 B. C+ O - renderType: "light",
0 z: j) Z. H4 J+ \2 H - size: [1, 1],2 H- a" ~9 g6 X1 }
- uvSize: [1, 1]1 H: B q$ Q. H
- } U) Q0 @/ g! l1 t. S2 D
- }
& V* |6 c: H- G0 Y, f - let f = new Face(info);
9 C0 S, ^; X% t6 _ - state.f = f;: g. L' t3 C5 p! N4 \0 A
1 o6 a6 Q, q" z. Z9 B4 P* b- let t = f.texture;5 Q0 S0 \' M% F M) g& d/ g
- let g = t.graphics;
! E! d4 x/ b7 b ]; p - state.running = true;
9 Q9 g! K0 O, C" J# @ - let fps = 24;
/ n/ d1 f; j! [' y' W4 | e - da(g);//绘制底图
9 o ~) V* D, V) o* D3 o$ k5 K1 { - t.upload();
# p& l4 W* g0 i4 K* q - let k = 0;
$ u0 m* u' k. D1 v. H, a* j; V0 N - let ti = Date.now();
. C6 l# ?3 C2 K! V- ?4 C - let rt = 0;
# `7 t9 V; H- W( y. W - smooth = (k, v) => {// 平滑变化& v% Q$ o/ v/ l# J) p% d
- if (v > k) return k;5 ]0 t, w7 I4 g( a" E, t& ~
- if (k < 0) return 0;
7 g1 L) W/ L# m" e! b) X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 _/ u0 ^, P2 ?: q; p - }& |. U- W, ~3 G }- d
- run = () => {// 新线程
' G5 m& Y5 I U/ N4 @2 _1 R - let id = Thread.currentThread().getId();
" V+ v7 K5 D2 w; C Z - print("Thread start:" + id);5 Z7 D; C& H- l+ p! k3 u8 T
- while (state.running) {8 w3 @) [% }5 W4 a$ r! }0 u
- try {
# v- l& G# h. W9 i2 g - k += (Date.now() - ti) / 1000 * 0.2;6 ^! z' p8 Y5 y; z/ t# J
- ti = Date.now();
# J- T) A+ u, |6 l+ m% E" } - if (k > 1.5) {
( R$ o0 f. d+ S8 | A - k = 0;
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- setComp(g, 1);
2 M0 O( z$ s6 w& j - da(g);* v3 U D8 e% {! L% Q
- let kk = smooth(1, k);//平滑切换透明度
6 @$ x( L3 h2 ?" T- ` - setComp(g, kk);+ R- Y n- o8 c
- db(g);# n% l. S. D) C. b. l
- t.upload();
% @5 `- B# u5 W& D/ o - ctx.setDebugInfo("rt" ,Date.now() - ti);
. O5 {. y- ]0 y. J. Z - ctx.setDebugInfo("k", k);
" o% y0 M% ?0 c! N8 a, S' | - ctx.setDebugInfo("sm", kk);
2 K4 m3 `3 H3 g, ]9 v5 { - rt = Date.now() - ti; d3 ?$ @! j5 V5 G3 X D
- Thread.sleep(ck(rt - 1000 / fps));
$ M4 b" `5 C3 }# t, Q* U& I& n - ctx.setDebugInfo("error", 0)# J2 y7 m) P7 g7 s3 e: \8 n
- } catch (e) {8 J1 B$ d* @6 @/ ]( O$ M! F3 T
- ctx.setDebugInfo("error", e);
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- }2 t6 a" r) q+ \. |* c* G/ b
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
1 J3 o% L3 l2 V9 Y" |. Q - th.start();0 W. S" m8 U- |; b4 J) ]) o
- }( f) D/ a& U* o
- _1 R% S; f" {! |1 W- function render(ctx, state, entity) {
& n( H0 J2 ?+ E( l9 |% U8 K - state.f.tick();
: C, t# u+ {5 N, {" V# E6 p' s - }
0 M1 e: h- r$ e1 \
* v3 F4 Y" ]/ b, P* x6 F4 y- function dispose(ctx, state, entity) {5 C, t# i1 H0 G
- print("Dispose");
( S9 ]- X/ x I) M% I: J& o& | - state.running = false;
/ G2 C5 m/ z2 k- P - state.f.close();
- C* {9 e, V9 ]0 A7 K - }8 }* H: i! w; Y
: B: o% N( }" G3 ]) _* `1 E- function setComp(g, value) {
, a h4 z2 f* z1 b4 c% q* J z - g.setComposite(AlphaComposite.SrcOver.derive(value));8 p h/ _ \: I3 u4 j; z: p1 v
- }
复制代码 + C. C8 Y# ]3 L5 C
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。
5 U9 m7 J7 X# e8 N! K" y% O; i
8 E2 P. ~$ ~4 ] 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)
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