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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。' ?9 Z7 ~# T4 x1 n
- importPackage (java.lang);* g- [+ v1 a& L% G& r
- importPackage (java.awt);
1 R7 r ~/ e5 J9 V - 8 P, |) p; a. {" _' m/ w# O" O# @$ {
- include(Resources.id("mtrsteamloco:library/code/face.js"));" |1 X# v9 N! E: v1 k( |* X
) E1 o/ t; C* t" t% o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
' x5 j! |. q8 c* o4 t
+ B& {7 P7 b1 B0 _- function getW(str, font) {
1 I% m8 ~) Y) i5 p/ l# H& @$ ~9 l - let frc = Resources.getFontRenderContext();
, l; u* v. S8 z Z6 M2 ?4 x - bounds = font.getStringBounds(str, frc);7 g% m+ D) l+ X- h( i) p
- return Math.ceil(bounds.getWidth());; X# |# u; ~4 y8 ]
- }* i2 p+ g3 Q" L5 _9 u0 ~, G
( Z [0 F+ s! E, ~. {- da = (g) => {//底图绘制1 p( o8 T( U! |/ V; C S
- g.setColor(Color.BLACK);& u5 G2 g: Y O; J M
- g.fillRect(0, 0, 400, 400);' l& ]1 l4 g/ p# E6 [9 H6 W
- }
' Q' E$ _( B6 G+ l$ F& g
! a4 t! ?0 Q! p% L A% U! H- db = (g) => {//上层绘制% C- B% ], }; J; F, G5 L) X
- g.setColor(Color.WHITE);& |0 V5 h/ s& q2 C) ]: {5 `
- g.fillRect(0, 0, 400, 400);# y# q0 M$ Q! o2 g' d
- g.setColor(Color.RED);7 @' f: [* L. \4 o
- g.setFont(font0);& i/ [" q0 `2 `9 }7 u" G& Y1 K, ~
- let str = "晴纱是男娘";
5 E- P! X6 I6 S$ W7 {3 f L3 t - let ww = 400;9 o) J( |6 A! _
- let w = getW(str, font0);% o. T& M( c" C% P: Q( l" b
- g.drawString(str, ww / 2 - w / 2, 200);' H5 v" Z P. |2 G
- }
1 X n% ~% Q& C& }( h% j - $ V6 o3 M$ |* y+ ]8 }
- const mat = new Matrices();" {% K' `: h: U
- mat.translate(0, 0.5, 0);
* ^, e2 z! q1 t/ e, _8 `# G - % U" D, K% f: v& z/ V- P
- function create(ctx, state, entity) {& p3 _; I4 W7 T# v, H2 g) \( z
- let info = {
( w/ r0 y: S+ b0 ?+ X4 {" ? - ctx: ctx,
5 R. L5 K& J# R% a0 [$ D4 Y8 ? - isTrain: false,
# u% x; f& D& K# e4 u - matrices: [mat],
) W! c! K' R4 j9 V& U0 b& U: R - texture: [400, 400],
- x o0 R) U4 |: p& r/ A - model: {
& z3 X) ?) e( f - renderType: "light",
2 G9 m X2 m X* `% I+ @/ @+ m. H: ? - size: [1, 1],3 D9 p8 A. [( W* [5 K5 ]
- uvSize: [1, 1], v$ K1 ^8 `1 e& _4 [2 R
- }
- S1 ^9 V2 e1 [' a6 M( R - }
4 i- ?/ [6 K+ V4 { - let f = new Face(info);$ i% y' U! c3 Q
- state.f = f;1 }3 b7 g* E% W% e
- T. c1 e/ y' F' t; c' ?
- let t = f.texture;' H8 c- R8 [* w9 [5 }
- let g = t.graphics;
0 ^3 |9 b1 @. r4 D - state.running = true;
# Z5 f S# d' L6 E9 H8 R- h8 [ - let fps = 24;
( }3 H% w, {) Q/ z8 f- N - da(g);//绘制底图
, D R7 M# d* u+ y" b - t.upload();& W* s) S$ d' o
- let k = 0;- r" |" _5 h6 ~9 Y7 q& g# }
- let ti = Date.now();
" t3 l5 d4 f/ o - let rt = 0;
' l7 o* n/ ?8 C7 I- c - smooth = (k, v) => {// 平滑变化
! y, n5 b1 g* m- i) R - if (v > k) return k;
: a& M7 D$ E/ l - if (k < 0) return 0;
! {* }( K% G2 p9 E5 l - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! I% @0 `+ F& K: b - }
* U r0 p: |. k, X$ _ - run = () => {// 新线程' N6 e) y5 s( ^1 ?" Z
- let id = Thread.currentThread().getId();
2 S0 p4 O6 B3 p6 j$ @/ `& K8 Q - print("Thread start:" + id);. ^) N2 c* v% ^ z
- while (state.running) {
( C9 Z& i, G1 B; w: I4 i8 q5 P) v - try {3 c+ D6 c, H1 ~/ D
- k += (Date.now() - ti) / 1000 * 0.2;' c0 s7 P. q; N' Y$ J; q M
- ti = Date.now();7 |8 W$ A7 R& `) o& y4 n
- if (k > 1.5) {6 E. a# n% D, l% f& m+ q3 q& ?# C
- k = 0;) I4 g E8 I% j9 B' f
- }. j9 \' ?5 f% y' E$ C" D2 H
- setComp(g, 1);6 A0 h& u- H$ X2 N0 ~
- da(g);; r3 y S6 f/ J
- let kk = smooth(1, k);//平滑切换透明度( y/ ~5 W l: q2 p9 I. M8 \
- setComp(g, kk);
4 M: n9 P$ Z$ H; L3 M - db(g);: b C7 p& G) B/ Q* ~ {
- t.upload();
4 Q0 \% k4 W. \, i4 b# L) n) Q - ctx.setDebugInfo("rt" ,Date.now() - ti);/ }2 ?" g& s/ k* x8 H' S M7 Q
- ctx.setDebugInfo("k", k);/ ^9 I g1 _1 p% @$ O1 D& \
- ctx.setDebugInfo("sm", kk);
. h: F, u6 c+ Q7 ^ - rt = Date.now() - ti;+ `( T5 J4 e/ `1 d. w+ l
- Thread.sleep(ck(rt - 1000 / fps));+ `+ j E6 k$ Q. U7 ]
- ctx.setDebugInfo("error", 0)$ K; U9 v3 _5 A& N1 [9 \' |0 U8 k
- } catch (e) {
4 ~$ Q2 o1 g7 E# V" a# y; Y- O - ctx.setDebugInfo("error", e);) L% M' W# ~, s6 Q: w0 v) c4 H/ q
- }$ c. H$ m4 [' k3 \% x. z
- }( v$ F% [' T; m X2 Z
- print("Thread end:" + id);6 ] k; \; l$ P& |
- }
' E- R) Z+ o M4 T1 a - let th = new Thread(run, "qiehuan");
5 ^* Y+ ^- c9 K - th.start();
7 ^7 ^2 w; W6 b3 y" r& l$ R - }
6 Q& q/ H5 e5 L* H - $ P, p& B+ e" B* u* \# |
- function render(ctx, state, entity) {& {: Z2 y0 v) I1 H
- state.f.tick();7 `2 d$ S9 R- r4 z$ G( G
- }
4 }' N3 C7 ]& Y5 ^2 t
5 W, I: A4 }9 t/ c1 d8 F9 m- function dispose(ctx, state, entity) {( d6 N. V. W3 {' M6 h/ w# o! J6 Q
- print("Dispose");
' I# z; f) h6 W5 e* @' { - state.running = false;
- ^! I) |4 r1 u/ C' N& Q - state.f.close();/ i) [! s0 X. ^! x
- }
* n3 b0 y7 h- ]. L - - G+ g( x/ x! N% F( u& n: y
- function setComp(g, value) {
; F3 L0 m0 s, m. R7 { - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 Z5 n: m1 u ^7 n y - }
复制代码
& I' P. k( M4 g8 D4 i6 D. w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。( W( Z( f9 M0 W; p" u( v$ D, l
3 Y7 Z8 }% E4 [& G3 g& f4 v8 Y9 R
5 O' j' v6 f' O B顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 M* o1 g. O4 K, H! j4 k
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