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! ?. ]! T: i7 V4 s+ R* c5 Q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。
" m" d& [& Z; Z- importPackage (java.lang);
' P* w6 ]2 K9 _- o* b8 I - importPackage (java.awt);9 t* i# [: p+ u$ j' J7 \
- ! W" f8 j( }* m X) {
- include(Resources.id("mtrsteamloco:library/code/face.js"));( E" @ @+ m' N! J0 e* R m
4 R, _* R" H' L+ s% d- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 o; t" o4 i ?; y1 _+ ]/ v2 U I
4 x6 w% t1 N+ g ?4 W+ n2 N- function getW(str, font) {8 |7 r* `* ?# E0 |' D, x$ L" {
- let frc = Resources.getFontRenderContext();/ z# [" ^4 I2 T% V9 @
- bounds = font.getStringBounds(str, frc);! c l2 X# m% j$ v9 @8 e
- return Math.ceil(bounds.getWidth());0 C' d' U8 c$ L* ^; l* r
- }+ G8 ~+ t' M& G* M" | p2 i! P
- 5 y/ k4 a2 t; ?* Z4 o7 u4 x
- da = (g) => {//底图绘制
9 Q/ u5 K- Q1 }5 _8 J* n: m - g.setColor(Color.BLACK);" o* q9 g3 A; h& q0 Y% x6 d
- g.fillRect(0, 0, 400, 400);8 h' d4 g( r& h( j/ F; t
- }5 q: x0 T0 K: i. G5 b
/ D* A" |6 {& ?$ Q: D. d$ {- db = (g) => {//上层绘制
$ |9 {9 j. F; |& w$ W9 v' { - g.setColor(Color.WHITE);& T' P2 X, o) K
- g.fillRect(0, 0, 400, 400);0 v I5 j- K1 G9 V% G
- g.setColor(Color.RED);
0 J* p+ P2 W y% F - g.setFont(font0);
0 l ]' r$ s' f# c/ S. i6 f - let str = "晴纱是男娘";; r8 }% I! ]$ s; t: j0 H9 X% ^
- let ww = 400;+ n! j+ k+ r7 n& y: H
- let w = getW(str, font0);
. G, j/ y9 ~( S& ]$ x% o - g.drawString(str, ww / 2 - w / 2, 200);1 c& e) Z; R: W& e2 \( x
- }0 p! S/ T. Z3 R
- ) I% u: w; ]7 l" L4 \) E
- const mat = new Matrices();
9 d3 x4 J* R- U* `0 c% R+ L; \ - mat.translate(0, 0.5, 0);$ x0 r* ^. F& W
- ; e6 C) D* g" N- E1 U6 Q3 d
- function create(ctx, state, entity) {
9 m9 {3 w1 n; B U) d3 V* v - let info = {
# y$ b9 r# {7 o% U: ^. m% b& K6 j" S# V - ctx: ctx,% k4 L* [# _7 |" Q! w
- isTrain: false,
7 v. | i0 c# `: B7 L) e5 p - matrices: [mat],
/ {+ i) v7 i! f5 C1 X: d - texture: [400, 400],
5 u: ~! K# \# n4 \, I% A - model: {
0 s$ a) S. B( Z - renderType: "light",
2 @+ \, {, H) U2 {; d - size: [1, 1],) X9 g& L( }# P0 @# k \
- uvSize: [1, 1]7 }2 G; T* u; C5 [/ U% ~5 W; Z+ A" T
- }
, O+ D+ W8 x, o) q5 L0 I+ Z - }' n: x! p+ K$ I$ n. |# j
- let f = new Face(info);
5 v. h& x$ R, a9 K5 u# s: A1 J. F - state.f = f;7 [8 A, O) G9 b2 R+ s$ V
- ) |& o' H: C& w
- let t = f.texture;1 [4 X2 h3 |% B- B: D
- let g = t.graphics;
1 E' \0 T1 Z" V$ e/ I - state.running = true;9 |& ?" ` U5 O9 b
- let fps = 24;
' f4 c) ]# {; l+ |' l2 U - da(g);//绘制底图0 _# n$ }/ ?" \
- t.upload();- D8 Y4 S/ h# S* m
- let k = 0;1 n/ Q5 E& G r8 G- `. l; |
- let ti = Date.now();' k8 l7 g* c% ^ X
- let rt = 0;" c! U! T% i+ |/ H$ q! s
- smooth = (k, v) => {// 平滑变化, c7 S) @. X' h; S5 E1 y# L% B
- if (v > k) return k;
; g ^. ^( X: z3 F2 R$ U( g - if (k < 0) return 0;
! m' ` A& f7 j - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
`# k: K1 I: V( j: z - }
; [% m4 A$ P; d - run = () => {// 新线程
( w v- U3 |9 u* }& L - let id = Thread.currentThread().getId();2 q4 r2 m& a( x" m0 ?2 Q
- print("Thread start:" + id);
: g5 f' b" n2 \9 O0 B - while (state.running) {
4 s$ ~, Y5 C5 }7 T/ K% B - try {9 r; T; g- f) t- v' s
- k += (Date.now() - ti) / 1000 * 0.2;
. |0 }2 f7 X K$ S @+ b f - ti = Date.now();7 p! @2 a% d. N, M7 K9 V) ?
- if (k > 1.5) {3 _% |9 |& m# ~1 k( a6 ^' e( i7 l
- k = 0;
( z' s3 r7 H$ m - }
9 e% Q; h: i! t+ Y- ?* V8 F, C - setComp(g, 1);$ C. \# N! e; I% _7 R
- da(g);
2 C: x1 S" Z( x2 u; P1 b5 A+ D - let kk = smooth(1, k);//平滑切换透明度' c5 Q5 k6 C% `% i8 \
- setComp(g, kk);
( N& O% Z- A8 ^" t2 @' W$ R' ~ - db(g);, C" ?& G& n% h, f: b6 a
- t.upload();5 b( X' p! m; H m
- ctx.setDebugInfo("rt" ,Date.now() - ti);" q E- [) J: I# u5 _: ~9 L
- ctx.setDebugInfo("k", k);
4 E' h2 Y: U3 n5 B9 ~! M. u9 G: q7 { - ctx.setDebugInfo("sm", kk);
3 P8 L N4 l2 R8 f6 H; }4 {( f/ n, c - rt = Date.now() - ti;/ R# t( `$ @/ ^8 T7 W% F4 C
- Thread.sleep(ck(rt - 1000 / fps));9 n2 z' o* s/ N5 l
- ctx.setDebugInfo("error", 0), @$ d* o; c# i$ l* t0 @
- } catch (e) {
( r$ [# c& w, Z [* |7 s) a - ctx.setDebugInfo("error", e);0 Z7 {6 z$ B8 J+ P) g( O
- }) |3 U0 U; F+ L- o
- }8 x% e+ F( @3 c0 u# e6 x5 D
- print("Thread end:" + id);8 K. w/ u( Z# s5 |: u: [3 V
- }: f/ _6 ~' Y p$ K
- let th = new Thread(run, "qiehuan");
# M. @' L8 @; t, K+ E5 r0 N - th.start();
$ U2 }* ~2 B6 q- R3 y0 Y - }' Z ?0 k. l" A3 ^* S2 y
* U1 b$ C+ ]' E$ r% i1 `$ u- function render(ctx, state, entity) {
! g* f4 _8 `% q& u& K; V' i7 m - state.f.tick();
( g2 u) b% ~! _( H$ j& q/ n - }
$ R; W2 k; M" D5 Y
* d$ r+ ?% e, |* l+ e- function dispose(ctx, state, entity) {- ?. p: d8 ?2 f$ B4 v O! I) Y
- print("Dispose");6 w, y! p& k1 C2 Y& U
- state.running = false;
- z* T2 H0 J7 E1 v( {8 u& e - state.f.close();4 @% T: E P0 _5 ~, U! n* c
- }: {' t9 @- f- v, w! u/ D
- , V6 f8 X% u: F. ~4 q W* D
- function setComp(g, value) {
7 Y( |$ q9 \9 w - g.setComposite(AlphaComposite.SrcOver.derive(value));) L0 P" C; A( p& p% ]
- }
复制代码
3 u, b# i/ r' a) S# o9 x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)+ u! @" H$ V( U" b
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