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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。
6 d r' x1 U0 n$ v& j- importPackage (java.lang);' n& f) f8 m0 y r5 s( l: ?
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));: i6 U! r ]7 u; Q/ D# D \
1 [2 P2 N# B2 j0 [& ]. r: U- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {4 F4 @6 y2 H, S4 }/ |
- let frc = Resources.getFontRenderContext();% o* M; i0 I, c9 t
- bounds = font.getStringBounds(str, frc);
" ~1 }% s0 K. O6 N - return Math.ceil(bounds.getWidth());- i8 m6 n1 m' w* Q1 u5 G
- }
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9 L: Y. n5 g. m- da = (g) => {//底图绘制- b3 s' o0 G. s
- g.setColor(Color.BLACK);4 Y1 j' B3 n W9 o
- g.fillRect(0, 0, 400, 400);
% R1 p& l; g7 w1 }4 _8 i4 s7 b - }. o$ ^' U( ?# J
- & T6 g2 D. w( C) m
- db = (g) => {//上层绘制4 O3 y7 N$ P3 j# E- y
- g.setColor(Color.WHITE);' G, f" p6 t- H; Y6 |9 F* I4 g
- g.fillRect(0, 0, 400, 400);7 r9 X1 Z! B+ L1 ` I2 B/ l4 u
- g.setColor(Color.RED);& D5 _4 e) g9 o; e1 `' ~6 F
- g.setFont(font0);
# b0 ^2 _& u" l4 c" F - let str = "晴纱是男娘";# I" v% S+ J+ d _5 ~6 l
- let ww = 400;
% Y. p% V1 R% B" f/ F) s+ ^ - let w = getW(str, font0);7 ^7 {. H; K d2 f- U2 W
- g.drawString(str, ww / 2 - w / 2, 200);
4 b- j4 C* a, { - }
4 [4 m# N8 C+ _/ h9 D4 B* f* u; d3 O
! G @5 P1 o0 f+ f% L# c, f( Y- const mat = new Matrices();! o9 }4 c7 J$ }( U
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {& d/ c" Y/ n7 ^- c; I0 l& A
- let info = {
( |9 [) q# o8 ^4 j; J7 z: z4 W - ctx: ctx,% z7 @2 e! D# B0 X. ^8 M
- isTrain: false,
& L' u; r& t$ V$ n t$ s- j9 M - matrices: [mat],' Z+ {' K3 Z2 h
- texture: [400, 400],2 H& Q& k- b' Y/ n+ O
- model: {3 t% E) o2 S% C4 N
- renderType: "light",
/ i8 _, `0 i- T' t# E4 i# G& v - size: [1, 1],# F; z9 Z8 i' b# k( b( j9 Y" |4 C
- uvSize: [1, 1]
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- }; b- F% N8 t8 D, j t+ n( E
- let f = new Face(info);
: p, M0 w% s( L5 h - state.f = f;% _: x4 }' n% S p1 z
- 2 u* Y% s3 ?7 H* d
- let t = f.texture;2 [$ b; M! a, R5 K
- let g = t.graphics;
0 t K3 J f: i5 L- g& R - state.running = true;0 _) u( I9 u& t9 s6 k
- let fps = 24;8 M) m2 U) @5 ^: f/ C
- da(g);//绘制底图
, F" E5 f5 s! [9 n - t.upload();
( n) P& l/ ^- |" c& U) G - let k = 0;
4 [ U9 M- A0 D! v1 E. N - let ti = Date.now();5 F- Y# e9 G p* Y
- let rt = 0;
0 u& L J1 z1 g- N! b5 Y: n - smooth = (k, v) => {// 平滑变化3 I' u/ F) P/ K$ t" r! I0 {
- if (v > k) return k;, k2 b0 P4 s! P' l
- if (k < 0) return 0;: s3 `. ?; V$ x
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
, x" \% B/ |7 p! _5 _ - }
3 z+ n8 t" G' e4 e" d - run = () => {// 新线程6 t2 w" ^: C" |+ X5 ^$ k# @
- let id = Thread.currentThread().getId(); L. R! w, p" r: N- T- ^
- print("Thread start:" + id);. J* v a0 H! r2 W4 u& X7 k, _
- while (state.running) {9 L. G9 M3 g9 c* t; r/ p8 m; f9 y, f" X
- try {
& ~5 j% y h2 I( j, P1 [! _ - k += (Date.now() - ti) / 1000 * 0.2;
6 X, ?, o+ Z9 z) } - ti = Date.now();& O% Z# B0 D" `, I( z
- if (k > 1.5) {
7 \; b5 k" W9 o# l+ c- |! | - k = 0;
4 A3 A9 x4 ?6 [2 e5 S, ] - }# L$ `6 n; p1 w) K+ w5 b& r2 t$ C) L
- setComp(g, 1);
7 Q8 w+ g3 Z2 W/ o, V - da(g); y% B5 V, ]( u2 I' _2 b) y) T6 @
- let kk = smooth(1, k);//平滑切换透明度# @4 f6 z4 T% d
- setComp(g, kk);
5 u9 m8 V. M, X2 F* N, B - db(g);
, `5 W7 Q5 d) g$ h' e+ q - t.upload();. @; a5 ~! r' S8 B6 q3 g! Y/ u. n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 r+ _; {9 O1 G - ctx.setDebugInfo("k", k);
5 n- G+ k5 X" X8 _! y! @6 s - ctx.setDebugInfo("sm", kk);+ _6 O9 K7 U2 @2 l( D9 p
- rt = Date.now() - ti;
0 T; b: h" D4 `" c - Thread.sleep(ck(rt - 1000 / fps));0 s& X: l5 Y5 z7 A( g% |6 j1 d
- ctx.setDebugInfo("error", 0)5 J* l% G$ d( v( h* y
- } catch (e) {
! _, }9 f) g* j+ i+ Q - ctx.setDebugInfo("error", e); S' J {" y# @7 ?1 u/ R# y
- }
; |/ d' f: J# _! H5 ~1 P/ w! ? - }
9 n: a+ |6 E. x% l+ ^5 J - print("Thread end:" + id);% e7 ~: o G. ?9 x
- }
8 O9 K; g1 q8 b. W# G; ` - let th = new Thread(run, "qiehuan");0 q( l" R. E4 \7 {9 c
- th.start();! B' L4 i( u5 |% o
- }
: v/ i$ }* P+ \; z
+ t# S( d' o0 x1 p8 e- function render(ctx, state, entity) {
) D) `+ Z$ V3 A. n4 Q( G9 Q - state.f.tick();
, @7 ~3 g+ w7 |* v2 [% u) Q( K# S% I - }* `5 ~2 a" s: s; b* ]
- 4 u" q( y4 |& ~. n \
- function dispose(ctx, state, entity) {
3 b' m+ `; D/ I9 m5 V; t1 ? - print("Dispose");
, x8 o8 {& I" t4 \" ]6 D - state.running = false;
. W+ a" Q6 M/ _6 C: _ - state.f.close();( o, g) q8 X" Z- h4 u6 L
- }# Q6 D* \; ]; X7 c6 V/ r" Q. W
- 9 n9 S+ h+ \$ a& S
- function setComp(g, value) {
/ D8 v8 M! K1 ]8 }: B - g.setComposite(AlphaComposite.SrcOver.derive(value));
$ d9 c. k" g. W - }
复制代码 6 ~ L& Y7 ]. a2 A) M4 i
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。$ _+ X2 c) @/ F( _4 f/ n
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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)9 d' T. P5 F, U. ?6 ^; P1 R
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