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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 J# Q/ W, t6 _$ c8 Q. H( \+ D7 G1 e- importPackage (java.lang);
, \/ s8 q# Y1 L+ \7 O, K$ I - importPackage (java.awt);
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1 M/ w7 y5 ~9 w h# H- include(Resources.id("mtrsteamloco:library/code/face.js"));) I0 m* H2 j0 z
- . ~* O- G9 U. V9 ^" @1 d6 g
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) j0 ^$ Y+ q; q! z4 x
- + U1 K% x! m/ P+ Q4 X9 q
- function getW(str, font) {
7 _3 ^( J5 x$ y' o4 w! n! { - let frc = Resources.getFontRenderContext();9 A( n }+ z3 j, c; p& _
- bounds = font.getStringBounds(str, frc);
& O, R$ |! Y# v, O% u* K - return Math.ceil(bounds.getWidth());' b, s7 K4 o% K2 I- _' `' S0 t
- }
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- da = (g) => {//底图绘制+ G( d. s" V% w
- g.setColor(Color.BLACK);8 W5 f& c! z% Q- Y( N1 D0 G
- g.fillRect(0, 0, 400, 400);
& m8 z$ x( v3 U, c - }3 a) w2 C# z$ _ N, j" K
/ y$ ]; n0 l& W. T, S- db = (g) => {//上层绘制
# w2 P% L k/ {+ j; H" } - g.setColor(Color.WHITE);
; v1 o; H+ c; ^$ R1 ?0 U: i - g.fillRect(0, 0, 400, 400);
5 E+ p' \! V& E7 c% y4 F7 P) @ - g.setColor(Color.RED);
" V* \1 `% M- L7 y: r! O - g.setFont(font0);
4 T% {" R% {9 F$ _3 c& J - let str = "晴纱是男娘";
& m3 {$ W, v0 T) P5 w5 V9 E - let ww = 400;
. E# ]' |9 G. ~ - let w = getW(str, font0);
6 `& ~' v* U5 ~1 y- ]; Y - g.drawString(str, ww / 2 - w / 2, 200);5 s/ X B5 M. O5 \. _. Y: Q' G' V/ |
- }
; ?/ R" K ^" u! C4 Q
8 o& E" H5 d/ S3 Z% X& k3 V. D- const mat = new Matrices();) S3 H. o# W4 M) ]# l
- mat.translate(0, 0.5, 0);; c3 \3 O! _8 }" L5 z4 m
- 5 n4 r$ E% w; g" A
- function create(ctx, state, entity) {
8 X) ]4 n" f( ~5 Y/ q t' R5 S/ b - let info = {% a5 C ?( @: N N$ E; ~
- ctx: ctx,
: F. O* @' k7 G- O# ]7 b/ c3 x - isTrain: false,6 Y' @* z, X) H4 k/ b
- matrices: [mat],
6 ~4 G! [" m. ` - texture: [400, 400],
: p9 E/ s8 b- K: l/ q9 { - model: {0 s( \. P4 T- B! J
- renderType: "light",
: w6 I- o3 s. { j# V8 Y - size: [1, 1],: g2 d9 e2 ~' P
- uvSize: [1, 1]
: s' g0 ]% x" D0 E, p. S* a - }' `: I8 O z5 u+ g/ f( p% a+ p/ K7 u
- }
$ Q8 I# i" \; ]' O5 X: U' H0 T - let f = new Face(info);/ e! W) Z: d8 J7 i- y
- state.f = f;
5 K" F1 E$ |3 [; d8 {8 \+ ?; P
& `6 d N: v: _* p- let t = f.texture;
5 n; ^& T% n$ y8 o& a! D - let g = t.graphics;
$ A8 U0 i& Z% }; f/ t4 B8 W O - state.running = true;" ?" n8 p3 v$ L0 U' ~! f
- let fps = 24;
I/ N& O# k5 I - da(g);//绘制底图1 M. @( f( }3 H: n/ w0 V: A% z
- t.upload();
, _4 u8 }1 z6 N - let k = 0;( K% b2 e% e9 B d7 `
- let ti = Date.now();5 g# Q" f/ j: M0 T4 j
- let rt = 0;. V* j3 _) s! u4 Q' T$ d
- smooth = (k, v) => {// 平滑变化
: b, W( L8 f9 e( J' R, { - if (v > k) return k;
4 }# w. T9 ^, [, Q! J - if (k < 0) return 0;6 E) V, d. |5 Z9 F% D3 T
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 d+ Q; z/ B" _. w; H - }
9 Y5 T+ ~ G& q8 d2 {( w$ D# v0 ~ - run = () => {// 新线程
* k8 G. e: Y# {3 a8 v( H1 m! o/ F - let id = Thread.currentThread().getId();, v; D( _1 }7 O) }
- print("Thread start:" + id);
) c* c3 D. E( H) Y6 J - while (state.running) {
0 F0 y% C0 j( ^! D' b, } - try {0 P. S0 L; ^3 `% T' g X
- k += (Date.now() - ti) / 1000 * 0.2;+ }7 O& I% L2 w: h( J
- ti = Date.now();
. _) k1 a$ D' b- ~5 v/ U9 {- i: e - if (k > 1.5) {
8 ~2 h6 w& a3 g8 S - k = 0;! M6 }* R d$ p5 x
- }; O3 s; v# W4 |8 N+ m+ j% r
- setComp(g, 1);$ Q1 J4 { o7 k# c6 E) i
- da(g);# y& ^; p, D4 e$ H! N4 I8 B
- let kk = smooth(1, k);//平滑切换透明度, v% [, g& |. _# J. t/ f, I
- setComp(g, kk);0 Q9 Y) t" [7 a# ^" N
- db(g); d+ R$ e2 a9 G( @
- t.upload();
& a( h' U) `6 m/ l4 b( h4 G - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ s( q. [3 M3 l! N - ctx.setDebugInfo("k", k);
& p2 a! m6 {8 o. R) ?" { - ctx.setDebugInfo("sm", kk);
8 B; V. m# l* F8 i2 w, H - rt = Date.now() - ti;
6 J: O- O( U: u# F( L! Z, l - Thread.sleep(ck(rt - 1000 / fps));
9 v. o. o+ L3 v% ^5 X5 k- _ - ctx.setDebugInfo("error", 0)
2 c+ I# {3 ]" t: O7 n - } catch (e) {
( j4 s: D3 U8 |0 B3 [ - ctx.setDebugInfo("error", e);
' c. @4 G4 z, @ - }2 O' M! G% j, }* l; I N
- }. m9 X' N, T. H+ ^8 V
- print("Thread end:" + id);* B: D4 p3 A5 G% S/ J3 X
- }2 T( }4 b. H% `; ?1 c2 P) a, r
- let th = new Thread(run, "qiehuan"); u; ~+ Z' e E/ }4 W5 {, V' |
- th.start();6 }% ~% M; C; C7 }6 u' q4 Z
- }; H6 n9 Z7 ~* P+ B$ E' K
- ) F1 u/ u) v" i8 {) i: r B" g
- function render(ctx, state, entity) {
6 q% T- c& W2 N; W) v% r( ~ - state.f.tick();
7 {3 R8 G" L% k - }
+ J0 L8 X+ u7 u, u4 r1 c- @
8 _/ t# o# ~* {% I6 `. f2 I4 d- \, z- function dispose(ctx, state, entity) {
" C5 G7 V8 F- g) w; B( \ - print("Dispose");
9 a+ k. d. |0 y4 p - state.running = false;
3 o" o% _* y' `/ k - state.f.close();
: @: l5 X1 s; s$ M! A) S - }
' H: h: T: \+ P+ R
8 D# G" o/ h+ X- F$ f: z- function setComp(g, value) {
+ }, V% e9 A q; N: g2 e& I - g.setComposite(AlphaComposite.SrcOver.derive(value));
! I; R: B( ~$ e0 ?2 }( O( z - }
复制代码
3 n& N3 |0 N4 ?/ C, ?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。3 W" m7 [/ E/ h
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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)
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