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, }2 |' V6 X: y. B' ~) i( ]: J) b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。" F( R' x0 Y' Z. K
- importPackage (java.lang);' K0 G# M/ {. a/ _
- importPackage (java.awt);. x3 h7 m+ i. W& ]8 X% z
- 5 }/ F ?: W. N) z/ u( y9 L6 J
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! B" }- Z4 f! R- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);$ Z1 g& K8 u9 y
- v( y( a7 `, s+ }( G- function getW(str, font) {7 t" @- ^+ g; k, u' L" u5 H
- let frc = Resources.getFontRenderContext();5 W* R- r4 ]7 ]8 ^& V6 i- a4 V- {
- bounds = font.getStringBounds(str, frc);1 @8 a8 q" b2 [4 w
- return Math.ceil(bounds.getWidth());
7 v/ v) P* M2 h3 }: V% ^; J' ^ - }
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, |# l1 D) b0 C8 S6 i- j* x' I- da = (g) => {//底图绘制
- { {$ _- @2 W$ d- y9 t7 f4 W - g.setColor(Color.BLACK);8 N( J$ o6 v7 X4 C p
- g.fillRect(0, 0, 400, 400);
/ E6 o& J7 [% M: w- h e9 i& p - }, D% j& ]! r3 h3 K' y
6 \) f& _$ K3 f' g: m1 Y9 V- db = (g) => {//上层绘制
9 R2 @& L+ S9 h! u - g.setColor(Color.WHITE);/ N4 W/ F4 I. d7 `8 V6 e8 j
- g.fillRect(0, 0, 400, 400);- D6 p) x3 b- x& N. c/ n/ O2 _
- g.setColor(Color.RED);5 A! }, P0 N& Q# N3 Y4 C
- g.setFont(font0);% z2 d/ |: Y3 w6 n, c+ O
- let str = "晴纱是男娘";* o6 e9 H( M2 f/ b v# K/ r+ E" C' z/ g
- let ww = 400;4 g0 ]$ Z" [1 d: E& n$ G( v
- let w = getW(str, font0);# v# { Z! d. i: g/ ~) ^% z
- g.drawString(str, ww / 2 - w / 2, 200);" O0 y0 D4 T8 |/ R$ n
- }
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) c8 N5 ^; W2 m0 O0 B: @* Q- const mat = new Matrices();: O9 o& e* g x
- mat.translate(0, 0.5, 0);, r' m- o7 o. X, r
- h% B$ U5 g# h+ i+ x; H4 q% Z
- function create(ctx, state, entity) {9 N% S3 [& U: U. Q/ ^
- let info = {
6 s% m3 Z) h. ~6 z; J: x9 _5 E - ctx: ctx,
0 z1 j1 P& [) {; A( o" X5 W& N5 w - isTrain: false,
* G- Y) ]" f8 K( y, s5 K - matrices: [mat],
( R* ]3 o/ E& f; v- k - texture: [400, 400],
% x$ Y8 ^& w3 L" {' }$ ` - model: {
4 Y2 |, G8 L) Y+ A4 f5 P - renderType: "light",
6 O: G% _& ]- n3 k( b" G& } - size: [1, 1],
" b* l+ N, e9 \3 r1 i7 H - uvSize: [1, 1]
5 z' @7 X5 I+ H1 h - }
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- let f = new Face(info);
9 u/ _1 w# u! \5 h7 r& x - state.f = f;6 R% l9 | k p, R8 E5 Q W
- s1 J% Q7 S( b$ Q: H( g
- let t = f.texture;3 Q9 g) E7 V8 @2 u$ Y
- let g = t.graphics;% v3 ?& F6 t/ q' x6 v% Y) s j- N6 [
- state.running = true;# m( x* A7 r: x
- let fps = 24; H$ a G' O' M+ W; D% g
- da(g);//绘制底图
; _5 D: B% E4 e; z; |$ t - t.upload();" D) l$ D W0 v2 _6 Z1 J. R
- let k = 0;
) C. m ~. {/ ^% Z: m/ [ - let ti = Date.now();
5 i5 v+ n1 z1 v% |9 G" r' r - let rt = 0;1 ^: I3 k. l: k3 P9 T
- smooth = (k, v) => {// 平滑变化 J9 }- @0 s$ y# p# f
- if (v > k) return k;
( p% A/ a) Q3 B' H - if (k < 0) return 0;
, {" a2 W$ ~) k; `, X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* _4 ]) l# I6 K1 r: g A
- }- p2 ~+ f5 b/ y! V
- run = () => {// 新线程3 J( S+ h: Q( Y0 v6 w6 ~" ^
- let id = Thread.currentThread().getId();; Q5 t6 Y" A( w4 t# _
- print("Thread start:" + id);
+ b/ e# c8 b; j3 L* [4 m - while (state.running) {6 Q1 R# @, [0 n# ^" A
- try {7 W& W- G% Y5 M
- k += (Date.now() - ti) / 1000 * 0.2;9 G" }$ }1 `4 b8 m2 Z
- ti = Date.now();! x- Z8 I) ]5 J: Y- r9 J" t$ @
- if (k > 1.5) {. C$ }6 y3 _2 k: `2 U7 |
- k = 0;6 _/ h0 o! V; B+ B2 @8 }
- }* v1 L) a5 E0 U# I& M* m
- setComp(g, 1);2 O1 ] m/ i/ p
- da(g);
0 [5 C2 @) @- M( r2 v6 s - let kk = smooth(1, k);//平滑切换透明度
% l6 ]5 o3 G5 @& [, F. O- I) c - setComp(g, kk);
/ Y9 b) V& ?1 P" O$ I - db(g);
* E' |) W1 C' h1 q) z! j - t.upload();
0 P' l, ~3 b$ g; d - ctx.setDebugInfo("rt" ,Date.now() - ti);
! i1 y! m% G* p, k - ctx.setDebugInfo("k", k); Z) _/ L" K/ t+ d& a9 F
- ctx.setDebugInfo("sm", kk);
# b& h4 S* _" @4 A1 [ - rt = Date.now() - ti;3 R9 Z- C& J7 {$ i, J; \) |5 d
- Thread.sleep(ck(rt - 1000 / fps));4 s# H: D# a |
- ctx.setDebugInfo("error", 0)1 e& e1 \1 x8 s5 `, U I# P
- } catch (e) {7 j( W% b+ v8 j6 W2 k; O" @
- ctx.setDebugInfo("error", e);' `: L, z# L/ o
- }) I v( j% n4 X. r$ _2 J# V Z
- }4 w! p+ a" s/ d5 i- w
- print("Thread end:" + id);; c! b1 b# N" w( H" D
- }: P. R( q4 c. g2 r
- let th = new Thread(run, "qiehuan");
3 d" p3 ~ f9 r+ ~& |4 i0 w - th.start();# ?$ r, N5 |* b
- }
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- function render(ctx, state, entity) {
2 e# K+ P \! I* J' C - state.f.tick();; r5 O, g8 [5 S) B: P6 P" ?
- }5 X0 [1 l: O; t5 u7 ]: I
5 q6 _$ }/ K- T+ M( ^/ x5 S- function dispose(ctx, state, entity) {1 x5 w9 g( u2 M5 Y. ^$ e
- print("Dispose");) [6 s: t W$ l4 n0 o r* u
- state.running = false;( V. p! Y; [" V2 f' R j; n& ?
- state.f.close();& I# b2 \, z* H
- }# i+ N- s c" y
& I, U F6 V3 a8 e9 P- function setComp(g, value) {6 E! V0 C0 p/ B2 D
- g.setComposite(AlphaComposite.SrcOver.derive(value));% N) X+ ^( k1 n* m1 w: h$ m7 O
- }
复制代码 0 R4 H2 p- _6 s: {5 C' 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)' ? R7 q) _# p0 R& ^
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