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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。2 |. l' r( N5 C$ Z" T% x
- importPackage (java.lang);) G |1 G" Y9 Z+ f0 V J+ s
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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% G! a0 p* G/ S$ J" ^: K. h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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/ F" h: X) W3 l: _& H* {* n: Y: h; f- function getW(str, font) {: T3 i# _# \5 M" S+ b& c
- let frc = Resources.getFontRenderContext();
! I8 b l# d: Y& b8 i, k - bounds = font.getStringBounds(str, frc);
) X2 V8 h( {. s3 G3 {/ p - return Math.ceil(bounds.getWidth());% e3 X$ N& L+ k4 ]' p
- }
/ e: [ P0 S4 r: E0 e( ] - # Z' z5 W$ A+ u: W- T+ g
- da = (g) => {//底图绘制
+ M# U' w5 {5 }, ^ - g.setColor(Color.BLACK);
3 f q5 m$ b% T' o6 M: A - g.fillRect(0, 0, 400, 400);9 k! R: G. r/ Q% q5 w9 j6 a
- }
6 K! w' ^) F r- e+ o: _, j' a2 B8 }
5 }( i' M7 F3 |3 l) g! z- db = (g) => {//上层绘制
- t* f! D( k5 D2 F) G! h - g.setColor(Color.WHITE);
" _5 z1 o& T; g4 w% g2 K - g.fillRect(0, 0, 400, 400);
7 b- P6 B8 E( m0 p% C; Q - g.setColor(Color.RED);; O2 W% B# Y2 h: S& m
- g.setFont(font0);3 a+ e- B. T9 g( T& E f
- let str = "晴纱是男娘";
$ Y3 M* j1 [! X - let ww = 400;0 D3 C5 I4 w) O) w+ `
- let w = getW(str, font0);
7 }; O& ^# Q8 w! Q2 | - g.drawString(str, ww / 2 - w / 2, 200);0 @* M0 Q1 ^. d% q8 a8 N$ i9 w! O' v& i
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- const mat = new Matrices();
+ X6 Y& d1 @% b( x( ^4 Q% | - mat.translate(0, 0.5, 0);6 L# o* _2 C9 @
' I5 |/ l6 W; ^" K% K- function create(ctx, state, entity) {
/ l- R9 x8 Q# M) _. ]/ i8 w* Y! p - let info = {9 g- Q$ L, c2 w/ J. H$ C; S H
- ctx: ctx,
; K. @& U% ?) m P! L - isTrain: false,
5 @, m f9 r/ b/ w - matrices: [mat],. X/ J. S) E2 Z/ w
- texture: [400, 400],0 V. {( F' k1 F# p- @9 [% M
- model: {
" Q2 }: g. s6 K6 e5 q7 |; l - renderType: "light",! ?! ~1 W# H. r3 D6 v* I. N" u9 t
- size: [1, 1],
' i7 C. V. J% R) d - uvSize: [1, 1]
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- }
' ~4 g* B, F8 _3 ~: z - let f = new Face(info);. ?3 D3 a/ c! n, O$ }" O. l- E
- state.f = f;
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- let t = f.texture; s) w, E$ ]7 a, O9 a3 D
- let g = t.graphics;7 `- c$ d& f1 i, D) `
- state.running = true;& O5 k0 ]/ e5 J8 R
- let fps = 24;4 w9 T- X. A3 M; V1 j% v
- da(g);//绘制底图
: Y }6 T( \; r" m' Y! v" s( O - t.upload();
% d7 `0 R+ h" }: g: R: K6 P, h - let k = 0;; c' [8 _: S$ z Y
- let ti = Date.now();
$ l; g/ E2 s. d0 M$ {0 M0 | - let rt = 0;
: N! e8 M: X7 ], a# `! B - smooth = (k, v) => {// 平滑变化( Y% N6 Y) A, u" y* ?) q# j
- if (v > k) return k;6 R# r2 \0 F! v' z0 w; Y
- if (k < 0) return 0;
# `4 D! y1 L/ G" v4 L2 I - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: G: Q& F7 R6 e8 m8 a
- }5 w1 E% Y8 Y4 }2 i
- run = () => {// 新线程
2 @! W3 y7 c0 ~ - let id = Thread.currentThread().getId();8 g5 a* c4 Q# B- L
- print("Thread start:" + id);! u7 j) N8 U" ?7 I+ ] C8 r
- while (state.running) {7 s9 A; [* ?" [& h3 O) s
- try {
6 N5 e# m3 t4 {. l - k += (Date.now() - ti) / 1000 * 0.2;
' t+ B& o, F/ ~" t6 M - ti = Date.now();: y; u1 s# z& ^1 T% E# o/ |6 k
- if (k > 1.5) {/ o Z/ `$ q" E
- k = 0;
- ?% M/ B, ^7 F - }
6 U6 T4 U1 V& s- U* ` - setComp(g, 1);; ^" ?4 A( m7 |7 ^' p
- da(g);
+ g( L% p) r3 r7 r: C/ p* {0 q; D6 A - let kk = smooth(1, k);//平滑切换透明度/ W$ d* H" D7 T+ j2 R: `
- setComp(g, kk);
9 D8 K& i2 e5 h! X) D3 @ - db(g);
* f/ k& @, H5 c& E2 t G - t.upload();
& D. R+ H8 n6 V# ?* A - ctx.setDebugInfo("rt" ,Date.now() - ti);
) a( w) T8 g5 k5 @1 m/ k - ctx.setDebugInfo("k", k);7 F3 |' h) b4 q7 `4 u
- ctx.setDebugInfo("sm", kk);, ~ Q0 x2 _. j5 Y$ b* a4 P
- rt = Date.now() - ti;
1 s4 \5 w: f2 D9 n* s& H - Thread.sleep(ck(rt - 1000 / fps));
g E3 z: V/ j9 x$ f9 j6 v - ctx.setDebugInfo("error", 0); h: G7 n) `" x; V, a
- } catch (e) {. D% Z& q# M9 i* b- Y! [# o
- ctx.setDebugInfo("error", e);4 a6 E: f0 ~; m: K( q# M+ v! ^; S" s
- }
: A' ~ o5 d0 s( Q0 z- Y - }
8 Y4 {2 @1 A9 ?. i8 ^/ F( y& ` - print("Thread end:" + id);
0 F7 L8 b4 D) Q: F - }
7 K! L/ }4 D1 {" F& e3 v - let th = new Thread(run, "qiehuan");
/ C8 }# I! g% @. T7 |: w - th.start();$ F% ^# U1 V z3 G# f
- }5 l& b7 n' O: m
9 c* e" j( |/ `" h/ f# |- function render(ctx, state, entity) {
) A4 @; C7 `- d* C1 s& y ~ - state.f.tick();5 q, k+ t% `1 {, e& `0 y) o* a
- }7 i9 l5 J K# J) ~. a4 k
. A7 b) l! X% ~: j/ t) ]- function dispose(ctx, state, entity) {3 p+ I* d0 l2 o/ m1 v
- print("Dispose");% x/ c m7 d' H1 K) c, J7 I
- state.running = false;
; V8 d m1 ~5 w - state.f.close();
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2 I1 ?* g5 `7 L L. g/ v7 D: B- function setComp(g, value) {7 a$ p1 o5 T# N' x9 o. o }) b0 O
- g.setComposite(AlphaComposite.SrcOver.derive(value));& u7 ]0 }$ K" i- @1 l/ X; Q
- }
复制代码 % M8 t3 Y$ e8 t* T3 _4 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。5 c8 j& N3 a7 ]5 L0 {
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$ p4 N; e) h8 g0 |0 G顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), J% o2 E% K2 k% W* R! j
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