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+ t1 b: H3 r, s! U" p8 A8 O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。$ n6 d$ H( z; C! k: ?" B, W
- importPackage (java.lang);
' m8 b& J: I- e - importPackage (java.awt);
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/ P& q. H j* ]2 C) M2 Q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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p7 e, D( A! ?& F1 o- ^$ ]- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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: N' ^; k( p" ?- function getW(str, font) {8 x! Y$ C& O+ e* V5 ?7 s
- let frc = Resources.getFontRenderContext();. |# Y9 _% m0 `" X: u) Q
- bounds = font.getStringBounds(str, frc);9 W, Z: p1 B2 `+ h* z* }; ]
- return Math.ceil(bounds.getWidth());
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- + H) [7 G" b* d2 H% l p, W
- da = (g) => {//底图绘制( E( a' w4 P0 D8 ?9 m, m4 z) J4 X
- g.setColor(Color.BLACK);; `; d: j% r! U7 ]! O3 R
- g.fillRect(0, 0, 400, 400);
/ V3 Y. Z( `$ d* r, z& u - }0 V4 d5 k1 K* u, ~
- , A& P8 T& Z6 H, M5 S
- db = (g) => {//上层绘制
K/ [5 U9 e% \4 W- o& a% S - g.setColor(Color.WHITE);
* I. ^5 t0 L* D# H; h, k - g.fillRect(0, 0, 400, 400);
1 r3 R* B Q- G+ a - g.setColor(Color.RED);
0 Q A: P) K* p1 r) k. V - g.setFont(font0);
# h" W, B. l9 W8 r: y) I1 Y - let str = "晴纱是男娘";
$ i" { c. C. U$ |& w6 @ - let ww = 400;- G5 y* M- T. l7 ^& q. V$ u1 j0 Y
- let w = getW(str, font0);# ~; Q4 {* k# K$ U
- g.drawString(str, ww / 2 - w / 2, 200);6 b& y; `. Q; ^8 i% d
- }
+ p& O# r# T/ r- Z% k- R+ M' s - ( S1 v5 ?3 F$ m0 }# O
- const mat = new Matrices();
% g: X" E, G; I; e) G- i9 H" p - mat.translate(0, 0.5, 0);
4 h X) q! _0 M
3 y, w+ D! T: M0 N$ a- s' U, F- function create(ctx, state, entity) {3 j5 |# U: n5 j. {2 D Z
- let info = {0 H. y+ Q Y# Q H3 d0 W$ t( z
- ctx: ctx,4 b3 u( H) x3 [3 j' `. n
- isTrain: false,
$ l7 Z V6 U- H- | - matrices: [mat],) h/ ^0 n) `% K) y3 r% J2 ]
- texture: [400, 400],! V, a, c/ V3 T% Y0 c
- model: {
2 `0 _) d+ v3 E - renderType: "light",
. {" v6 ^' n0 J; h2 j3 w - size: [1, 1],
9 l N! G" F! f0 w# t [% [2 f( M - uvSize: [1, 1]
8 N7 ^% {' S' U o4 i) |- O - }0 I5 U) s& s) @: ~2 r( e/ t
- }1 s0 f5 {; I0 F. F3 e. \4 {
- let f = new Face(info);
; [7 l1 R' ?: H' V9 G4 @1 } - state.f = f;% ?4 g: {) r# q' ^3 I
- ' R) P9 w/ T4 c7 K2 k
- let t = f.texture;7 ]) Y: R' t) C5 v0 r
- let g = t.graphics;: B& G+ p B- k' w
- state.running = true;' i- g7 V" f' x# t6 Q5 b
- let fps = 24;) |# D4 K! M0 u5 D n" T: b/ t( y
- da(g);//绘制底图
* c8 W# q( x" F7 B - t.upload();7 u. y$ r: z* |! g- Z! T; M
- let k = 0;5 W8 Y# r, [5 ] ?4 ~6 A5 `
- let ti = Date.now();1 Y: {2 Q# D$ b& f- p Q, c
- let rt = 0;/ p$ h2 p J- ]& r
- smooth = (k, v) => {// 平滑变化. k: ^( L& l: z1 w1 h; {+ M% y9 M
- if (v > k) return k;
1 I3 \0 e F5 G) n& t( I - if (k < 0) return 0;( A& T( e8 [( S* ^: i
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 L* m* }# K* }) {" T5 _ - }
* w$ `2 V1 e8 d5 r, T6 B& s - run = () => {// 新线程
: [3 }7 r& h- h9 w# L) a8 w - let id = Thread.currentThread().getId();
]9 ?' \/ G4 ~+ J% W* q6 d - print("Thread start:" + id);
6 M; N2 ` O2 y - while (state.running) {
! g. h# x' k9 a4 s - try {# e5 f7 P: ?! [5 N1 t l
- k += (Date.now() - ti) / 1000 * 0.2;( R) E8 @. n, @7 k# \
- ti = Date.now();
: D' u8 U9 |/ p. }$ Q5 |' H - if (k > 1.5) {2 E, N" o/ ] z0 P5 N. T2 K
- k = 0;
* a0 o4 G; B% y2 ?# ~% z - }
7 }' i6 l& O6 [+ H - setComp(g, 1);
Q) X( y9 h) n! K0 t& G$ ` - da(g);
3 S. U0 S5 c0 o - let kk = smooth(1, k);//平滑切换透明度( c9 @, ?/ f% ]* M; m O4 ?
- setComp(g, kk);0 l( ^8 ?) c- f+ o" i; r `
- db(g);
9 t8 W8 @* a2 P; ` - t.upload(); }! t% z! S7 u% T; }% K
- ctx.setDebugInfo("rt" ,Date.now() - ti);
, h3 R) r- W G& j0 y Q- j; g1 a - ctx.setDebugInfo("k", k);
* e. Y' ]- L% f4 v, B+ b0 j* E - ctx.setDebugInfo("sm", kk);
2 F+ `" q# m3 y/ q - rt = Date.now() - ti;
4 W- a4 Z; _% b; u* Z; u - Thread.sleep(ck(rt - 1000 / fps));
) l- e8 |8 p: b4 Q) d, c* b - ctx.setDebugInfo("error", 0)
, |" q+ a' r3 O5 }5 x* | - } catch (e) {
( o9 z# }/ U2 G( v3 q" z: U - ctx.setDebugInfo("error", e);3 O4 ?" u8 O5 [( s% Q
- }5 X1 x7 @4 h1 i f
- }
& Z7 b* N; p1 a: t% K, l: T& M; r - print("Thread end:" + id);
- m$ G5 j' G+ P. P' C7 s - }5 T: E7 x' @( m G
- let th = new Thread(run, "qiehuan");. ]% M8 O4 B: J @" ^9 c
- th.start();- X+ I- D2 I* k+ m; M" [
- }
! ~& O- y' `$ L& { - 6 C; f0 v, t2 k* q! P
- function render(ctx, state, entity) {
% r1 j! |2 c- g - state.f.tick();0 E0 n( m* o/ r/ s( N' p; v
- }
: O$ Y2 w0 w* l - ' W* }' x+ t/ |3 w# I: r4 Y( t% u
- function dispose(ctx, state, entity) {% {1 G2 ~4 H4 S1 o
- print("Dispose");
; Q* c9 F1 \( A& k - state.running = false;& \, I+ d) d: |/ p$ x! a
- state.f.close();9 |5 k6 w7 L: f) j: p
- }2 q; a. J# {8 L( n2 Y+ l/ z5 V
- 6 A! P$ n# e( x
- function setComp(g, value) { q8 \. e- d8 _6 f/ P
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 I7 L# P) C5 l+ N3 q/ c( D - }
复制代码
6 R$ t, Z4 g! u4 R* M6 t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。9 H, b, H; i9 c. D9 u
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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)8 `2 ^. J+ M4 H N! p) k
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