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3 T: P# _0 l. I! W- m% J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。, {& _/ d: Q# {' q0 N
- importPackage (java.lang);
- y4 ^1 V6 M# E( T - importPackage (java.awt);
+ q! x. Y0 T* r! h7 t - 4 p* l) H% y6 f; n( K* m4 I4 ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));
" T5 S* ]0 L; x F/ C - & ~/ z# j. d6 `5 z. X! M
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 o8 E" m. s+ D$ C
- 8 L7 y5 w9 o4 G# w8 q+ J& D+ i( n
- function getW(str, font) {2 _! f& ]: k. r2 R5 y
- let frc = Resources.getFontRenderContext();
! \% z* m1 |9 p* V. X% g5 }7 N" ` - bounds = font.getStringBounds(str, frc);
, {* E' K' R( I; R - return Math.ceil(bounds.getWidth());
! C$ [$ E3 J+ N4 R7 L - }
* _% Q5 H5 Y8 Z3 Y/ G- l; G0 F
D3 ~/ l3 L- M- da = (g) => {//底图绘制5 w M! @! G9 p3 E; b
- g.setColor(Color.BLACK);
) T& a) x% M; D8 q' ` - g.fillRect(0, 0, 400, 400);
2 R8 k0 X. q1 ?+ { - }( j6 [! u, k4 U/ f' X# ]
- ; M d6 ^7 j7 O& p
- db = (g) => {//上层绘制
8 [0 X1 S, l J8 D4 v7 \4 v @ - g.setColor(Color.WHITE);
{5 l9 j4 \0 w1 j, `, [* b - g.fillRect(0, 0, 400, 400);
5 J* g( H) v5 L6 ~& b - g.setColor(Color.RED);
# E6 O! G& n, g6 U5 ]# N - g.setFont(font0);% H8 C7 |- h7 B u# c
- let str = "晴纱是男娘";
# g# E$ L& W$ _# f8 u% q - let ww = 400;- `6 |/ G& z- a' V5 @6 V
- let w = getW(str, font0);. @3 I* c& p R& y" G/ H, K
- g.drawString(str, ww / 2 - w / 2, 200);
/ ], C9 E% {+ R5 o# J - }
, F( C+ C, }+ N, w
! ?; ^) e0 Q4 C9 d! z- const mat = new Matrices();1 O% f# G0 o! S' t2 u1 Z; t0 O
- mat.translate(0, 0.5, 0);3 V: f# k- z3 s
; P! f; P. U5 |4 d5 J% m- function create(ctx, state, entity) {
- R% [. M" t( @6 ]) ] - let info = {% Y6 \& k4 G" M! j
- ctx: ctx,7 E4 ^. K, c: V# c9 o& C, G
- isTrain: false,
5 N6 |" q* f" c# J) z - matrices: [mat],
3 {" h6 _+ V" K$ Z: ^% u; N - texture: [400, 400],
& r2 j: N. `' {5 b- [8 k - model: {- b4 _. m3 ?: |; o/ Q
- renderType: "light",
' C: K* w. t2 g - size: [1, 1],
( a2 Q' ]# \5 C7 Q8 c - uvSize: [1, 1]' |/ a" a" S1 \' G7 O4 O
- }
6 Z8 i9 }* `8 z7 d - }" K3 c1 e# t1 d& v4 r
- let f = new Face(info);
2 u( L; W/ ~ @ - state.f = f;
! {( j/ S: C. \2 g( i. H k - 8 B' H1 ]$ m3 K7 e' A7 o( U
- let t = f.texture;
2 X; E: B8 b3 `+ A1 N9 }& U6 u c - let g = t.graphics;
; |( e7 d O0 ^9 J - state.running = true;
; ]2 A. E! L7 ]' S" D7 N# O1 c - let fps = 24;
" \ n8 ?0 s6 I9 C$ D2 `9 K - da(g);//绘制底图
$ d4 \' {6 }7 t& T9 Y& b5 ~4 \ - t.upload();
: P7 Z8 h' [1 M# C; x - let k = 0;1 n7 d( z* @. A$ j9 U
- let ti = Date.now();$ N2 e; q8 r6 ~4 c+ b; e5 N6 ]
- let rt = 0;
2 O: g. n) [$ |/ p3 w! T - smooth = (k, v) => {// 平滑变化
2 `5 b- l" ~; z; s) k - if (v > k) return k;1 {* Q! m% |: ^" C0 N) x5 X
- if (k < 0) return 0;
! T3 c* M2 r D9 ]" ^1 F, p - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
9 u/ A# g2 @" _9 L# r - }
7 o7 v7 q+ y6 W% Z! j - run = () => {// 新线程: a9 \2 K6 N1 L/ a2 w* r$ M$ ~
- let id = Thread.currentThread().getId();
' U7 G- k4 x1 L4 k# C - print("Thread start:" + id);
! R( H/ m B q9 _! b! i/ J - while (state.running) {# m! h, \5 G$ O" C" m" k# F
- try {
9 [: @5 X& C2 Y4 N5 i - k += (Date.now() - ti) / 1000 * 0.2;- C& X! R& m9 H; C/ b
- ti = Date.now();
! w R& [, }0 ^" u6 j+ p. y - if (k > 1.5) {
9 u/ [( |) S; k' g - k = 0;
, j e9 K ]6 [1 U: n3 G/ j; S7 L5 s - }7 S4 @4 t# F/ J* X- _$ x# v
- setComp(g, 1);
6 z! I, Q3 ^* X/ C7 U - da(g);! [* N7 `4 P/ H/ m I
- let kk = smooth(1, k);//平滑切换透明度' d6 `- X' V# H4 K
- setComp(g, kk);2 X& f0 a$ q$ { e& x) z
- db(g);9 Q4 K$ C& W+ E/ r2 [ I' O
- t.upload();4 l; k$ _& b7 v: d/ }; Q
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- O* E) d1 K7 X% F; @/ d - ctx.setDebugInfo("k", k);+ k. B/ s$ W7 u- j8 ]
- ctx.setDebugInfo("sm", kk);
' k$ }' E9 k3 o - rt = Date.now() - ti;
* g" k2 M! j4 h+ m% h - Thread.sleep(ck(rt - 1000 / fps));
# j# j& {5 o, q' r2 u - ctx.setDebugInfo("error", 0)8 j% |4 Y5 y* d6 J- m& H9 \
- } catch (e) {: `* G$ @% h. S5 g3 x
- ctx.setDebugInfo("error", e);
C) e# u* z5 E3 f - }
& i- B" o( `" U: |: | - }
6 H9 l, M: N% e% ]$ c - print("Thread end:" + id);
: w" \- K* O- Z* p! w. A. c - }
+ }2 ~- S/ O$ e. o: n4 V7 d/ [ - let th = new Thread(run, "qiehuan");' y6 u( h; u4 v" J
- th.start();
* c% W1 s! G6 `& L {0 @ - }/ h3 |6 j# S7 l) s
- Q, O; E& D7 B( D; N" {0 p
- function render(ctx, state, entity) {; X+ W" D2 O% B2 ^ P. Y: y2 g
- state.f.tick();8 `, i7 @" R4 R' P9 t7 O0 k/ f
- }2 @) x6 r( p1 F9 K& O0 k. u
- $ ]- Q6 q! C$ _' @7 {. h; t
- function dispose(ctx, state, entity) {; [* p, q. C0 h. f. M' Z' h N
- print("Dispose");% _' Y0 L) t( o- j1 Y/ V
- state.running = false;
6 W& F& m4 \3 R: P" Q% s5 P - state.f.close();
) l3 {6 k) X9 I2 | - }
' U$ r3 k g2 m2 V: \ r# l( H - # } D+ z; z. ~+ N
- function setComp(g, value) {
0 w1 U( Z4 q- p# O$ y3 @7 U/ g; v6 d( h - g.setComposite(AlphaComposite.SrcOver.derive(value));3 S! {$ j N$ Z
- }
复制代码
5 l% _3 g) h9 e0 g3 s& }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。# l: O) K( D6 u/ W3 Q! f k! x- }
6 g5 K8 t7 e( Z! K) r1 O3 S* i+ x
; L8 {6 h. d& i* X+ v- `( 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)8 q) @1 W* R' h
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