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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。- ]8 |2 _6 W! s& X+ W7 f' M
- importPackage (java.lang);& j5 B" K/ H8 d5 i* s2 ]0 o. r
- importPackage (java.awt);
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: h# B# j; O* K! O0 Z" A- include(Resources.id("mtrsteamloco:library/code/face.js"));
& \% L+ E0 T X$ d
& G% _$ h: t/ l" B$ A0 G& D- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( m$ s- d* I; e. z
- . {& [9 O/ P7 `
- function getW(str, font) {3 d! D. O% k0 B
- let frc = Resources.getFontRenderContext();8 a9 y( |0 ~. c* ?
- bounds = font.getStringBounds(str, frc);8 x) P: k! M4 L: Q0 C
- return Math.ceil(bounds.getWidth());7 ?4 T! W) S. i; e: o1 q1 M
- }
, V: n% y3 Z5 I" O3 ] - " Q% L; j* J U0 b0 l3 Q
- da = (g) => {//底图绘制2 Q* Q0 _+ p- S4 i/ }* @. Z
- g.setColor(Color.BLACK);
R/ P' x9 f+ Q: W9 u9 [ - g.fillRect(0, 0, 400, 400);" a, K% d0 y2 f
- }/ J. i. E7 A. F5 e4 r5 k: S7 T. V" ~
- 1 a A1 m, C2 R/ ~7 c
- db = (g) => {//上层绘制, v$ J8 |% u- d5 `9 o7 X/ r. w" x
- g.setColor(Color.WHITE);
8 y+ S' i2 `0 O% q - g.fillRect(0, 0, 400, 400);
5 x8 r/ U9 W, K) P$ r7 h1 k - g.setColor(Color.RED);# Y0 X, p% Q% a3 U! _- g7 o
- g.setFont(font0);
) ]. [; b# q5 k- X, Q - let str = "晴纱是男娘";
4 m1 x2 g g0 O( j3 Q - let ww = 400;2 s- s% Y+ g# h% E$ `
- let w = getW(str, font0);
( s6 d1 x" _) v. Q. H. ]& i+ w u - g.drawString(str, ww / 2 - w / 2, 200);
% x) i) U+ c3 G3 T$ } - }
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& U5 p% @6 A" j- const mat = new Matrices();2 h: Z$ C3 V+ W$ D+ ` `4 O8 n
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {: h. w, |9 e0 r0 C
- let info = {
6 h# K5 V$ p6 l/ E* J - ctx: ctx,& b5 ~% q6 W) ?; f! W
- isTrain: false,; X% Y6 ]0 r( G+ Z9 R
- matrices: [mat],
* n/ L: l; |" R - texture: [400, 400],
) ~: M; h9 H9 r4 j3 r: q - model: {
) d; l1 o% r1 T - renderType: "light",
4 r5 i+ t; N' v+ N" m. y) Z( k+ o - size: [1, 1],
" L% @% e9 p( Y! l: \" F" ] - uvSize: [1, 1]
+ s P% A& d. D* X8 x - }
/ [9 W3 L, K8 d7 Y - }$ l4 y- W! W1 `% |
- let f = new Face(info);' A9 E; k2 c1 e4 f2 w/ a6 M
- state.f = f;
. N* }) S# I- g8 V `6 C* }# c6 }
+ s; j3 Y: h& b5 X/ T- let t = f.texture;' D0 X2 m/ Y. @; A+ D- U
- let g = t.graphics;
% C3 Q( E; n/ q5 X8 Q- Q [ - state.running = true;
3 B# F1 ~5 P8 [8 X" x2 n - let fps = 24;
2 z. K# H* u2 r. c$ _ - da(g);//绘制底图- k) t6 S u* M' D5 X- U: H4 v
- t.upload();7 m+ a- ^& x; c8 |6 v e
- let k = 0;
" e% ~ f! P" W/ ]; S7 z - let ti = Date.now();, J8 `8 V6 R& b Q# Z
- let rt = 0;
, b) a# M( T% ?' j - smooth = (k, v) => {// 平滑变化6 `4 D) v; v/ h" ?6 A& y6 w' ^- d
- if (v > k) return k;4 H/ ~0 E9 N4 x& [$ `
- if (k < 0) return 0;
) u4 h; D8 c9 i$ f! ]/ W - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 j1 W" j7 u8 J
- }
' g3 v, a' K" P# ` - run = () => {// 新线程3 S2 ^* J8 P3 v) N
- let id = Thread.currentThread().getId();2 H7 }' C' J, r; y0 @ }3 y
- print("Thread start:" + id);: H3 B7 [) O+ r$ ?2 g9 t0 m* [
- while (state.running) {' z# c* Y8 W; D5 e
- try {
2 ~+ r* f- S- b) j3 z - k += (Date.now() - ti) / 1000 * 0.2;; K2 U5 ?" e! ]. ^3 [1 ]) f
- ti = Date.now();
1 F2 T* V' G4 U0 @: d - if (k > 1.5) {: c% ?7 u6 v7 w( Q
- k = 0;( a: Z M8 e* `7 ]+ O
- }
0 Y7 a/ G3 E0 d6 a( z. b - setComp(g, 1);
9 Q, w9 M5 u! y, l, j, [ - da(g);
, B9 }) ]4 Q1 j0 t% e8 y) k - let kk = smooth(1, k);//平滑切换透明度, z: b$ f z' r7 F( [
- setComp(g, kk);9 E3 |8 ~ A1 n1 k ?$ u# ?
- db(g);
+ \8 G! |- d7 H - t.upload();
! q j( G. R( m. ]# x% B - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 `2 H- ~$ H" w - ctx.setDebugInfo("k", k);2 N1 Q1 P% `! X0 `0 {+ Y" G
- ctx.setDebugInfo("sm", kk);
- S2 H) r6 X8 v: N% @' m - rt = Date.now() - ti;
) c0 N/ Z( B0 z7 p - Thread.sleep(ck(rt - 1000 / fps));9 C# J; X! d$ w' x0 E& j% z. c
- ctx.setDebugInfo("error", 0)
& q$ `0 L( F# L' M - } catch (e) {
9 I% `; n+ H0 F - ctx.setDebugInfo("error", e);7 _! R7 |1 B4 q5 y1 [- l T
- }
$ G) ^ v( z8 S3 t/ U: P - }/ q% I% f3 P5 ] {( e: v
- print("Thread end:" + id);
. X6 m4 S, E. c! O' b3 M - }& A) `! Q( X3 Y+ x$ X
- let th = new Thread(run, "qiehuan");
# r' T4 ^: U2 f9 S - th.start();0 D) O3 x7 G r- |
- }9 t3 ^" I. @) p( S4 J6 x" H1 ]; Z( t
$ f$ W; W* o3 K2 i- function render(ctx, state, entity) {# |; a+ @5 k* U5 J% M
- state.f.tick();( ^. y/ U; u3 v4 ~% ?0 B
- }3 J$ { v! _& f. a$ j/ Q
- : V$ p% k3 e( v) G
- function dispose(ctx, state, entity) {
t) }% x; w+ G# ]0 f6 p1 W$ q7 h - print("Dispose");
1 t, h/ o# p1 b: y2 b - state.running = false; \* T0 N9 w& Q* a& |& h f
- state.f.close();# p8 L7 a% L/ m! r
- }: D" R4 w+ [4 q4 ]5 X& d
- Z& p1 ^/ y- ` h" r- m+ x) }
- function setComp(g, value) {1 ]; B4 t Y% U s F. w" \3 N
- g.setComposite(AlphaComposite.SrcOver.derive(value));7 M) }; j$ S! K' ^" X6 w' R
- }
复制代码
9 N! [6 p6 m$ L r. b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。' s4 F$ W: c& D, d$ E+ W0 b
) |9 a" \5 C2 d$ \6 b; G: i' o0 `2 H4 m1 K' }
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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