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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。
; A( y* c1 h: w4 |, ]8 l- importPackage (java.lang);& K' M; @" w) e+ B8 b+ M
- importPackage (java.awt);
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6 j. @# c& f6 y1 w6 C- include(Resources.id("mtrsteamloco:library/code/face.js"));' O# V9 Z8 U( c/ B- J/ I) [& G
# I% f( O" D2 G. H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 F+ ^/ A1 C8 K( h, e
- , B9 F1 z$ q6 l# a1 D5 k
- function getW(str, font) {
( w6 \8 x$ N9 E6 R/ {% I - let frc = Resources.getFontRenderContext();
) [/ P$ Z# V# B$ H+ o$ r" t' {, n - bounds = font.getStringBounds(str, frc);
M0 d# s) u4 j5 h* e: I! k" T - return Math.ceil(bounds.getWidth());/ F4 ?/ J4 b: w) N# g! u, K
- }
- @ w G# H4 p$ I& b& U
- e! I# o, i6 b- da = (g) => {//底图绘制( h$ H" W/ P; Q1 c; {/ i( ]; `
- g.setColor(Color.BLACK);# t: d6 B2 z) e. o
- g.fillRect(0, 0, 400, 400);3 U/ p% }$ o+ [$ q Y4 @
- }
8 q+ L. H+ k8 I+ ]& ]
# q, U) `0 n- ], j6 G/ F' |1 F- db = (g) => {//上层绘制9 F1 j/ t5 s( n4 v( Z% @
- g.setColor(Color.WHITE);: D2 U4 r5 h' o- d8 w4 h
- g.fillRect(0, 0, 400, 400);
: i# w1 o" {* r6 |8 ^+ L - g.setColor(Color.RED);8 n+ Z$ N. l5 G |! \0 U
- g.setFont(font0);
1 P( O' t+ E9 ~ - let str = "晴纱是男娘";
% F: W* C! L4 K! l& G; g6 T - let ww = 400;# F! v+ U% t) j) H# k3 E
- let w = getW(str, font0);
( |; m1 G# u2 O - g.drawString(str, ww / 2 - w / 2, 200);7 Q% L5 ^8 K) D* p, \; G
- }
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# g- J6 K7 v% B# O x* s2 W9 ]- const mat = new Matrices();
: u M: c( d1 a* ]% b$ I4 {) e - mat.translate(0, 0.5, 0);; ?. { l1 P6 Z1 u
- ' x: _5 R* T- \6 J# d6 g
- function create(ctx, state, entity) {
: j) q) \ P/ }6 F% M9 D2 p0 [ - let info = {
+ {: P( h! h. R$ Y5 b5 m - ctx: ctx,
* N" |% n0 {; Z* K - isTrain: false,
% q3 ?8 T. Y0 ]% j8 G - matrices: [mat],( X4 k/ t0 _, f% X8 `1 v5 H+ X
- texture: [400, 400],
) i+ d% M7 `) g( P1 H9 P b3 @7 h+ q - model: {- f; T/ u+ B% v- C
- renderType: "light",
+ ~& i6 x3 L2 t5 @- S9 J% y - size: [1, 1],3 X: r5 X9 @; w2 K+ p
- uvSize: [1, 1]# b( f# s- y3 F2 _* A' h
- }6 F: ? f# Q; A* u& @1 a3 H# k
- }
: F: p- W2 ~! X. W& V - let f = new Face(info);7 v0 i4 C8 M8 r r+ B& _- s9 a* S
- state.f = f;
# q2 S) z% r. i5 w$ M
8 L1 X# @- s( s9 O0 T9 I, w6 S- j) P- let t = f.texture;
8 ~# U+ P6 i3 B. a- f8 g0 g - let g = t.graphics;
& _7 a/ [$ R5 w7 \1 b) F8 |/ J - state.running = true;
, }; E& i; @/ F, P, c: d7 l - let fps = 24;& Q4 o0 F* M4 L
- da(g);//绘制底图9 T; B4 k: H3 m9 s
- t.upload();
7 }! S/ F. w+ F! U9 F2 C$ j - let k = 0;
; @. X$ s+ |' X7 v" \ - let ti = Date.now();
1 m, o9 l& ^+ a( Q( i - let rt = 0;* @- w) u4 X: S* q9 k
- smooth = (k, v) => {// 平滑变化
% d" m" ], t$ B/ m7 [1 F, o - if (v > k) return k;
. b9 H! y( h b4 H% }1 T/ v - if (k < 0) return 0;
4 s+ {( Q% k3 X$ `( w% ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; r& h; m ^/ v, U5 T5 G9 P
- }2 D/ _5 b! i& D% f, O
- run = () => {// 新线程
& F4 J1 I0 G- c( D6 ^: x6 c1 ] - let id = Thread.currentThread().getId();
8 F; P6 s: g5 k/ A& P2 x - print("Thread start:" + id);' L1 ]4 D1 ?( q; k, S z4 u/ P4 d
- while (state.running) {0 Z* ?8 E% @0 w3 h- F
- try {
+ K3 Q' ?, d* P8 h - k += (Date.now() - ti) / 1000 * 0.2;
# `- M& j/ W! ~$ v - ti = Date.now();- A: R0 G" r% t y
- if (k > 1.5) {' k) J- D1 p% M( @2 |& A3 R
- k = 0;" M! W9 X. k- c. h+ _* v& l1 U6 Q9 u
- }
, A, Z/ X. I4 |7 i3 c - setComp(g, 1);8 J& c. g- l8 ?' {) w6 A
- da(g);: X) M* i( ?$ G I+ d1 {4 C
- let kk = smooth(1, k);//平滑切换透明度
1 I0 g7 j3 u7 e - setComp(g, kk);" _, n6 D, X4 G0 O+ i J: f
- db(g);
2 D8 I# [# e1 t4 |8 @4 m% `$ _* t$ l - t.upload();
% u4 }5 J1 V3 U2 ?# o5 {6 _8 [ - ctx.setDebugInfo("rt" ,Date.now() - ti);% L8 w. E2 S* z, z6 n' t
- ctx.setDebugInfo("k", k);
0 [3 Y0 c2 k' d0 z X - ctx.setDebugInfo("sm", kk);$ O" K) k7 b) O2 r' F
- rt = Date.now() - ti;
4 F* l4 |1 d& K. Q" j0 ~+ r* n - Thread.sleep(ck(rt - 1000 / fps));. H9 D* n$ c8 x" g# p% B- A
- ctx.setDebugInfo("error", 0)$ L8 g) p4 R) p) }/ _
- } catch (e) {
. p+ b5 {# d) L7 u1 c - ctx.setDebugInfo("error", e);: X5 E5 t+ W$ ?" W0 u
- }- z# h9 q3 q/ v) n* c$ R% i5 v
- }- {! R' k& U- H; |
- print("Thread end:" + id);1 x: B V, P& V4 K% z
- }: n, V: u: K4 k
- let th = new Thread(run, "qiehuan");% h& M5 w: {& l, Q
- th.start();
3 D% g) e( s4 G G+ z% W - }
: {8 f6 }" e! `( U - 8 S1 {5 Y' e7 l9 R
- function render(ctx, state, entity) {. M8 v- f9 T V; q( s9 I% g+ s
- state.f.tick();) `9 p6 K& L- R: k& w4 X( b
- }
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- function dispose(ctx, state, entity) {3 |' a! L0 t/ [! u" P% f
- print("Dispose");
$ ^1 n& s1 y6 ]# \3 O - state.running = false;, |) j2 {0 P5 c) W" s' Y8 @7 }4 `
- state.f.close();! l- C6 ?; m6 e9 W I/ t
- }9 Y- o1 U* b$ J
- : G# o; {" J6 ]2 J& K3 O
- function setComp(g, value) {
/ c% V. n+ ]6 V - g.setComposite(AlphaComposite.SrcOver.derive(value));/ h5 V5 T7 R' F
- }
复制代码
, Z7 u# l* m. D' _& K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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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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