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: h1 ?! y. {3 @1 m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。: {( o5 q- `: U8 j, ]6 p4 G8 N+ U
- importPackage (java.lang);( i1 }- N0 k, {- |
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
* ?% ?. h9 A3 M+ C$ J6 `+ S. U4 U2 ^- ? - : A2 M0 G/ l% k, d) Q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ ~8 B8 m) \6 U
2 q: A4 s/ ]( S0 C7 o- function getW(str, font) {" q0 Q5 t( `) D8 C8 v
- let frc = Resources.getFontRenderContext();; \; G. P3 M2 D3 \9 S
- bounds = font.getStringBounds(str, frc);
# D1 d! V: k" u2 _ - return Math.ceil(bounds.getWidth());0 C* S7 W# } b, [; c% ]6 `4 n) l
- }' _ x& f! ~/ s# Y. {
- 1 v& J2 c' v0 C, r- N: y
- da = (g) => {//底图绘制
) c% O* u) i9 U1 m$ i7 J" f - g.setColor(Color.BLACK);) u# p7 A- @5 G6 @( A
- g.fillRect(0, 0, 400, 400);
* X( `, y2 I+ i# D - }
7 o8 z; S- z# }& G
4 n! L, _& q3 |4 a- db = (g) => {//上层绘制
# o4 w" c* v' ^ - g.setColor(Color.WHITE);
% J" c( }: V# T0 `+ i% g - g.fillRect(0, 0, 400, 400);
5 F& J) l W# J7 P - g.setColor(Color.RED);
$ z. \% S0 d# E% j) L0 [) T2 i - g.setFont(font0);" n" c' M: o+ f; ]/ p
- let str = "晴纱是男娘";# m9 Y# i0 ]3 p1 p
- let ww = 400; U0 y3 M3 _# I- ]
- let w = getW(str, font0);" v9 I, z0 }/ v% j9 I
- g.drawString(str, ww / 2 - w / 2, 200);2 l7 n' x; m$ M1 q
- }9 j1 _) @8 g3 k) E" G
! L% @& N6 Y. J/ t- const mat = new Matrices();! ]6 N1 `, j. B' c
- mat.translate(0, 0.5, 0);
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- v' E3 S: J1 ^; S6 O; V3 i- function create(ctx, state, entity) {7 M) I h- i+ E; |- U/ u
- let info = {4 r* e9 ~3 A E* i( U9 Y& z5 E
- ctx: ctx,
3 W* ]7 g( A1 d, q4 I5 u' o - isTrain: false,
3 q$ ?. F1 V* y/ w+ Q0 s# L7 F - matrices: [mat],
/ P" c/ o. v* x5 t5 `1 O7 D6 b - texture: [400, 400],4 d5 w- d% Y( @1 h
- model: {
) y1 M. H8 |! P. m - renderType: "light",
5 y. N1 S; x. A4 p( p - size: [1, 1],9 d( l( N- m$ K/ n* s) h$ a
- uvSize: [1, 1]
! L. t" O; ^0 a: ^* z& l - }! u; O4 s! a5 [! ~3 j R! h! U
- }# ]9 O: {' ^( V: P0 T3 Q, L I
- let f = new Face(info);
" C" `, l) C9 I6 X! t4 u - state.f = f;, Y, ?8 _& o8 |8 m6 P& B
- 0 j; k5 ]" ^3 V0 m% n( _
- let t = f.texture;
6 {4 q# {3 @& g7 {4 e; p9 D/ [ - let g = t.graphics;5 K0 b" [' S( q% M
- state.running = true;1 [$ L8 m, P$ y
- let fps = 24;
. t7 a8 o6 P) O2 d) m# J: j$ w - da(g);//绘制底图5 x* _1 u% ^& N2 ]' i, H; l- ~% J
- t.upload();* _3 v4 i% S3 Z* _. k7 o. O
- let k = 0;
7 n8 i j! r) v% r: M - let ti = Date.now();/ W0 r: B; E8 z7 s; C
- let rt = 0;* P+ x* T0 j3 k9 K
- smooth = (k, v) => {// 平滑变化& v; t" ^4 r3 w1 f3 i& N
- if (v > k) return k;4 Z2 J B, L* n( _+ S
- if (k < 0) return 0;+ V8 x: y. t" d9 x" q; u# M& S- \+ v/ O
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, d# [+ {6 \4 I9 y0 e# H
- }
P% r' i# W9 ^( [2 W2 s/ M - run = () => {// 新线程
; ^% z2 z. e/ Y4 I - let id = Thread.currentThread().getId();
( L4 r8 Z! x& \9 P+ ` - print("Thread start:" + id);
# V- M) G. d/ ? - while (state.running) {" Q) H" F5 J* V* c2 r/ L
- try {
* ], ~8 w! {9 X$ u' I9 R$ R- H - k += (Date.now() - ti) / 1000 * 0.2;
& a. e( t! C$ Z7 v$ P - ti = Date.now(); O ^* G' O& m+ p3 o. k
- if (k > 1.5) {% a8 E' N2 T. [& F3 C
- k = 0;2 G3 k$ w) X0 `8 F% p
- }* |1 G U. {1 w S, `
- setComp(g, 1); T; K8 R6 M$ q6 p
- da(g);. `0 C+ J/ n, y
- let kk = smooth(1, k);//平滑切换透明度; @$ R8 F. h [: F. w
- setComp(g, kk);
. |" f/ T% j" S: _# K - db(g);' L1 J/ x3 o* [% B3 E) t4 s
- t.upload();
/ Y7 l$ D5 }$ \% W# ? - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 ?5 C' I9 c3 ^8 z - ctx.setDebugInfo("k", k);/ n+ f% u1 ~3 u/ M; ?$ f) A
- ctx.setDebugInfo("sm", kk);
* M- I/ _3 R$ t9 O6 ? - rt = Date.now() - ti;8 {5 ?. d! {7 |; j! I8 ?3 [3 N
- Thread.sleep(ck(rt - 1000 / fps));/ k# m1 D4 ]- n( v1 u1 F
- ctx.setDebugInfo("error", 0)
# {# e0 {3 k4 b, V - } catch (e) {
$ `0 P! r3 y9 N! h4 o0 [1 y - ctx.setDebugInfo("error", e);; i& M- Q& U7 f9 Q
- }
' D& p( k0 L* c+ ?* M. n2 a6 ~$ N - }
& D) e9 |0 A; B! x1 } - print("Thread end:" + id);
8 L3 M/ x, t3 A% ?9 Y - }8 \8 w+ K4 O6 G6 o# ?
- let th = new Thread(run, "qiehuan");/ k) r* a4 A) X; N3 @+ s6 W. h% b
- th.start();. Y7 O% ^+ I9 @8 c, I. _
- }
1 U G4 }; J" O - : V8 I, M6 W4 k0 }
- function render(ctx, state, entity) {0 J7 X7 `0 V! C0 U u% U. I3 [6 M& O
- state.f.tick();
$ m3 Q, w2 J! t9 E2 y$ |3 L9 N - }
, H; i, t% i2 `% }, M: e8 [ - 4 _% @( y& a6 A) q) x
- function dispose(ctx, state, entity) {
* M7 W2 s) c5 g0 K! \, q R - print("Dispose");, j7 j$ \5 e' n( O& P. Y1 P& G
- state.running = false;
# }4 U$ C! a+ n8 j0 r - state.f.close();
9 K2 K5 c0 y g" x& l - }9 J, U' c2 S" J2 H5 M* o/ q0 Z+ x7 {: ]
9 f$ @5 w' B. D. L- function setComp(g, value) {' z0 `4 L8 w# G R$ o) G
- g.setComposite(AlphaComposite.SrcOver.derive(value));
- r: }% E Q- Y J X! ~ - }
复制代码
' G5 S, J5 i% i/ A# K; v3 A! 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)9 f6 _( X9 L) S* N K/ h" d
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