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% x/ U% t' I# S9 `. O* e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。, P8 M8 K- y9 ^/ @; z
- importPackage (java.lang);7 ^- h% V: B9 }
- importPackage (java.awt);8 O0 P6 V5 B5 i5 [; M
- 0 n9 f: w/ n4 Q/ ^' I) A
- include(Resources.id("mtrsteamloco:library/code/face.js"));' S% }$ v$ w4 Z6 T6 n3 S6 a
- 3 ~; U/ P3 c2 F) X) @" _
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
+ ~9 r d8 o4 A. O7 o0 }: F - ! I$ n5 {8 p% p; ?. l/ ~ i. p
- function getW(str, font) {( W+ s s1 }1 d" q$ d
- let frc = Resources.getFontRenderContext();
: x/ ?4 T9 Q) d! P - bounds = font.getStringBounds(str, frc);
+ N d. _; H9 L1 c/ o - return Math.ceil(bounds.getWidth());
" D- {; w) \$ g. L, x# X - }! M" F! X) K* x! x$ o
* L, U$ j! t; `6 [- da = (g) => {//底图绘制# j; `" }8 E& E
- g.setColor(Color.BLACK);! g q# [* B/ K3 n1 ?
- g.fillRect(0, 0, 400, 400);1 }2 v4 l+ R$ \5 f
- }4 U7 |1 `( O3 T3 s* `
- ( `5 U+ w, k/ j% @
- db = (g) => {//上层绘制
6 k& w! D4 E" j5 W - g.setColor(Color.WHITE);
}9 r* J; }6 B; G% H/ S! g6 K - g.fillRect(0, 0, 400, 400);, Z. b3 J N: z [" Y
- g.setColor(Color.RED);
+ S( A. C3 N6 M9 H6 E - g.setFont(font0);
( q4 f$ p6 |( h( ?* v7 r - let str = "晴纱是男娘";: m& C+ J$ J7 X c3 q8 n$ N# F
- let ww = 400;
4 e) ^1 V& l% V - let w = getW(str, font0);
9 x% o, B* p/ q9 o. h+ v6 W b - g.drawString(str, ww / 2 - w / 2, 200);
1 E8 y9 U& X1 {2 e3 y - }& |+ ]+ t) e3 Y8 h
- ' W; n4 P! Z( }, H# q9 J j& R4 `
- const mat = new Matrices();
& i9 X! c6 N0 S4 w) j - mat.translate(0, 0.5, 0); D C- _" c$ e( J8 e, K y* Y
6 ~, w$ v! Z6 w2 K5 a& o( j- function create(ctx, state, entity) {" x8 C& o# @! f( C
- let info = {
# D0 A, \2 V6 Q# O \ - ctx: ctx,! d5 w, l% Z$ t& U- C
- isTrain: false,
, t a/ |7 N& k9 T( {- a$ F; U - matrices: [mat],
# W$ j0 n* }6 n' ?3 E$ x' S - texture: [400, 400],- S* I1 Y: S& X+ D" j; O! Y/ Q
- model: {3 r2 A. Q+ N) q5 B2 e9 @% {
- renderType: "light",
" U/ Z9 V9 B' r - size: [1, 1],
: Y( x x9 Q, x' x$ H- ` - uvSize: [1, 1]
0 d o* ]3 p, k0 y, Q3 b - }
9 U/ B M1 h4 j3 U$ o) r - }
) N5 ^+ j8 r$ x: P3 Q* {0 p) V - let f = new Face(info);
: E& o/ H6 T0 D - state.f = f;
j; u$ H; ?8 O. U$ s+ B3 h! [8 C
T0 w( U0 T* E; X! w- let t = f.texture;. b+ |; v+ b, s# Z* L
- let g = t.graphics; G! S: _% z4 G) ], e" `% g1 f$ J
- state.running = true;( H% J/ j3 w. c% @5 L& M( \# q6 b
- let fps = 24;9 D1 E& J4 i! p$ n2 s# a
- da(g);//绘制底图
* U# X6 Z+ G6 T+ n3 O; Z - t.upload();- K' @5 l- h8 s% m8 H5 G
- let k = 0;+ O& u7 p* C" _& R/ k
- let ti = Date.now();
0 Y, q$ V3 `0 t- ?: ^ - let rt = 0;0 r+ G" _% }! B9 x( U" M4 v
- smooth = (k, v) => {// 平滑变化/ q* f! @, k* g' k8 ~/ B+ w% S* Q% `
- if (v > k) return k;, j- A- Y$ N1 m/ h' c" L' v
- if (k < 0) return 0;7 P8 Q$ u1 O/ n: v) g, c) b/ b
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% j @1 i' b' ~5 {# e
- }
$ Z% S5 r7 }! U) }4 y0 ? - run = () => {// 新线程
, C/ J6 ]( a. C2 Y - let id = Thread.currentThread().getId();
1 x( F: d- t& f$ a/ F - print("Thread start:" + id);; @3 M% J) `: X1 `
- while (state.running) {. D, z4 B7 H! b E# I! g: d) r1 C
- try {/ _3 @! ~" X. Y- u, e I ^5 |
- k += (Date.now() - ti) / 1000 * 0.2;( d( \+ g# n7 \2 R! p
- ti = Date.now();
8 w& g, p! `5 K; P) A- L - if (k > 1.5) {0 R& Q8 j0 I: h9 }# w S, I0 E
- k = 0;
% B# l1 O R) u* d7 V( r1 Y - }
0 i/ \; b' j8 k1 `* @, ` - setComp(g, 1);6 o! H' e1 M* q; j
- da(g);8 u) y) `. `) ?4 _# l; z+ S
- let kk = smooth(1, k);//平滑切换透明度& x0 ]& W `# _( D4 G# D! T
- setComp(g, kk);
) b8 n% o- e/ _: N3 ]$ x& `) m3 C - db(g);+ a7 r7 a; r7 @% t. m
- t.upload();
8 ?, ^2 P, }2 c- m# J; s0 c: { - ctx.setDebugInfo("rt" ,Date.now() - ti);" i: v* D1 l, \2 h q2 q
- ctx.setDebugInfo("k", k);
. n; Q( }) w" m: s - ctx.setDebugInfo("sm", kk);
/ Z" B6 X2 Y% U# ?% ?: J0 x* H - rt = Date.now() - ti;& n; C# r+ p( T! r1 Q. w! |
- Thread.sleep(ck(rt - 1000 / fps));" Z* S9 S4 Q, j
- ctx.setDebugInfo("error", 0)
" A# \% [- s, j. e2 ~" J; [( S - } catch (e) { d, i& F6 c7 f/ @
- ctx.setDebugInfo("error", e);! Y N& t; `& \' t6 ?. G
- }
0 {% E; o, ~8 _ - }+ [, Q" P7 `6 q: _. c# n' ^
- print("Thread end:" + id);) u, f; D0 n X6 ?( u6 s1 ~5 B5 t
- }
: R" g; n( ]' ^/ b. N$ |6 x - let th = new Thread(run, "qiehuan");
2 y7 ^; v, U) ]5 T4 d* u# o - th.start();
; R% K5 a& j$ F6 E - }4 V+ {9 u# n- S% S
7 A' a* U& b/ i) L$ V0 b+ D- function render(ctx, state, entity) {' s& J( l5 T8 ^% A6 E, T7 E* b! O
- state.f.tick();' y* l- T: J7 O* i; k' J% s
- }
0 y* E2 a& l5 a6 y" t4 o6 N - 5 H! [1 f$ ^7 D6 }
- function dispose(ctx, state, entity) { H; r+ ^& v8 P$ \/ U
- print("Dispose");
6 s1 ~% I2 I" x& y j" L- [ - state.running = false;
, v5 a! F6 c% q0 A - state.f.close();, @% L, N! ]; B
- }# D; k7 a1 h2 f' h
4 x& E9 h4 z6 T: L5 h% W) L- function setComp(g, value) {9 ]; `8 t, X, X# j
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 i ~. |- l% V( e
- }
复制代码
: j, R# E% M6 ?" R/ I! N+ 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。
2 K/ R7 e3 O6 t# E4 c( w5 F: Z) e" v6 Z! ]
6 w% A3 h( J8 i% f顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* _. q( E% \( {, _8 X0 ~
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