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) [" N2 g, v. I6 n- L( w/ B( G8 h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。2 Y* @8 [* O$ }. a; \# d
- importPackage (java.lang);
: t6 R1 ~% z8 G) n2 U- z1 ? - importPackage (java.awt);
: |/ ?9 b- W) I% |! A5 O" w+ _
# w: K5 x7 t1 ~: z- include(Resources.id("mtrsteamloco:library/code/face.js"));7 j" d! c( w" x" }
" _# H0 f: G& G' l- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
Q2 @4 E r- {# T
0 u! X2 v0 f& R, ] s" Z5 i: _- function getW(str, font) {9 O: M' o# `: Q) c
- let frc = Resources.getFontRenderContext();
* o; A$ D5 a) x- I4 ? - bounds = font.getStringBounds(str, frc);
8 W! ?5 I- N, C9 j; w9 H" @ - return Math.ceil(bounds.getWidth());" B, R9 v( A' t; e) l; v
- }
( ?- s. a2 ~# M) L2 c
`0 @, m/ @/ _7 ~- da = (g) => {//底图绘制
" P( w9 [) v' Z) o; T% S/ ~ - g.setColor(Color.BLACK);
# x" ?" i$ F6 k. T - g.fillRect(0, 0, 400, 400);* v% o8 G9 V' N% N( H( q% Q
- }
5 H, y3 a: k% j: c3 b
; N! [8 c. U y; Q$ J- db = (g) => {//上层绘制
- B; p% Y. `1 i* ^/ m - g.setColor(Color.WHITE);
. ^: u" o- _7 \5 o( ~! M - g.fillRect(0, 0, 400, 400);
4 a* m! a$ Y& z( i$ v- F: f: s2 ^ - g.setColor(Color.RED);
: z' I0 @6 ]. X: i! V" `* Q+ X - g.setFont(font0);6 a) p) G/ C* q) O* D
- let str = "晴纱是男娘";
* d9 G* `8 J$ ^/ E6 i - let ww = 400;- U! d0 x$ W1 B6 t6 k
- let w = getW(str, font0);/ B; l: b1 f! w) S9 n
- g.drawString(str, ww / 2 - w / 2, 200);( n2 H0 Q1 d2 @5 H& V
- }! ?4 V6 d t a4 z' N8 C4 b/ t
- % Q( F" _ _7 F% f, N- u
- const mat = new Matrices();
( z- g# s' d- {5 }$ \ - mat.translate(0, 0.5, 0);, S, ]6 c, D1 C# ?6 W
4 z0 i4 @8 v) H$ C: P/ Z- function create(ctx, state, entity) {
' J1 A6 M1 i& x7 X - let info = {
+ c7 M. I7 K$ o3 v - ctx: ctx,
. s9 u8 q; H) v7 n! l" }- S# o9 F - isTrain: false,, |9 L2 S+ P) i7 R
- matrices: [mat],
- T' V# v! F9 V. l9 ]+ N - texture: [400, 400],0 p! `! l% Z% M
- model: {- F* C0 t7 W7 X6 p8 X3 T
- renderType: "light",
7 X# i/ Y, Z v4 ]6 u0 l/ q - size: [1, 1],
1 B% f( R0 `6 U% T - uvSize: [1, 1]+ B" R+ f3 _6 M- q( O7 B6 y: @3 \
- }* E! U- L/ \! i8 ~
- }3 G& f" E5 t- k9 B
- let f = new Face(info);
; s& N) }, q: j* z - state.f = f;
' e6 J; M) T. f" o
5 V9 z! n! h5 F7 V, l. e& d- let t = f.texture;
8 ~$ ?1 f/ J, ^6 |/ ` - let g = t.graphics;; N6 h5 P6 V4 c; r
- state.running = true;
+ m4 E Q& B* k6 L' o. }, g - let fps = 24;; [5 b2 R* ~7 w4 x
- da(g);//绘制底图: B9 [6 ` }0 _" S" e
- t.upload();
8 P( c0 j) [( i% ]- G - let k = 0;
: K$ c/ G: j9 y+ m - let ti = Date.now();+ _- e6 X5 G9 N. j; h
- let rt = 0;
% R+ l' G) B) Q* Z9 ^, g: X - smooth = (k, v) => {// 平滑变化. c. o0 T% D, L3 B W
- if (v > k) return k;
9 I4 w8 F( A; C$ ^' U2 \ - if (k < 0) return 0;- i. B0 E) H! z0 f& d0 r
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' }" G% E! J6 K! d! X
- }
3 |. P+ c6 w! }6 } - run = () => {// 新线程
& c4 C, y1 C/ o - let id = Thread.currentThread().getId();2 j! \0 A' T! M- z" M
- print("Thread start:" + id);
0 d- i( Q: q, w- o8 ~7 c - while (state.running) {
* W6 e$ A$ [2 ^& X( Z6 {; K# F - try {) `8 M+ G: `# n+ K8 z+ p: X( d3 f1 p
- k += (Date.now() - ti) / 1000 * 0.2;
8 k" Q0 x! S# Q+ J; f0 j+ w - ti = Date.now();
( ~$ I4 ?) {) T* [ D - if (k > 1.5) {
9 g- g1 m$ o7 x! [$ c- X) X% _ - k = 0;
/ i6 `4 B1 z2 B - }0 x5 B; S5 g5 h9 K
- setComp(g, 1);8 C% V: _4 f' y/ n! u) s
- da(g);
g! Y- ?: ]# S& G. g - let kk = smooth(1, k);//平滑切换透明度1 P: r5 h3 I- u' ~$ h. X
- setComp(g, kk);
' }* N. f7 |! s W1 x$ _$ ~: M8 s - db(g);8 l0 P; H m+ m' s9 I7 ^
- t.upload();, d5 ]5 C2 }# M( ^5 d8 h
- ctx.setDebugInfo("rt" ,Date.now() - ti);
5 s* w/ U$ d4 ]9 c$ Y) ?4 q( r9 D - ctx.setDebugInfo("k", k);
! v, p; a0 B/ N3 w1 V" f' w - ctx.setDebugInfo("sm", kk);8 u0 H ^& b4 }: U( p
- rt = Date.now() - ti;
! |7 _, h W( w - Thread.sleep(ck(rt - 1000 / fps));% }) R) ?' w/ a; I
- ctx.setDebugInfo("error", 0), c+ S2 f/ p) Y; i6 Q% @' B
- } catch (e) {! g& [+ ?, i& a
- ctx.setDebugInfo("error", e);
( C+ y4 V, L, I8 @' e { - }6 g* c# h$ c# k5 }1 M2 l3 z$ J$ m1 j
- }5 `5 j# O* Z, I
- print("Thread end:" + id);
. A% Q* d; Y9 f( _) f9 C - }
+ _/ ^* ?; z, \9 }% N - let th = new Thread(run, "qiehuan");
; L# s2 _ D4 M2 H. B, k Y" X - th.start();7 O! _; b5 g: {. x( ]# Q1 z6 F
- }# X7 ?6 J; [; d8 `0 o
$ v" |, V9 L& c5 Z- function render(ctx, state, entity) {; ?! o* i; A, |# [9 Z% F6 K h& h8 G5 }
- state.f.tick();
7 q, H. L* @) V- F1 K - }
0 ^) ^" Q, D, @" m0 @9 h6 {: Q: G
# W, m: M3 y S- function dispose(ctx, state, entity) {
2 c8 q# G& h7 T% |" w6 f1 k) w - print("Dispose");
8 b+ Q$ _+ M" ^) \; z - state.running = false;$ t8 r- v; q* f' B g# N \
- state.f.close();% o& U' b4 n9 N- `# `6 n3 b: [' u% }& s
- }
+ R2 B7 Y$ W0 D* P - $ `, v5 I4 E; p! T
- function setComp(g, value) {* E% h9 I4 `/ X# k. Z }
- g.setComposite(AlphaComposite.SrcOver.derive(value));
, ~ w- s; U* A. R - }
复制代码
( s8 x2 R) k8 O) J% M. b" Z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 q( ?4 E$ t! Z
, K( j: r3 p3 z7 B( d, n* C6 _
; r' y% ]! J! Y6 [2 {3 |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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