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4 Z& ]. k9 d8 V; E4 \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。4 j& [/ N i2 v$ L: \
- importPackage (java.lang);/ @" v& d, I$ C" C8 i5 b$ A Z ~
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 A" {) z! `) E/ y h- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" B) J* Z! Z- M9 ~9 _( y7 F, |
+ s; K3 K0 S, M' D& [- function getW(str, font) {
/ l- \# u$ _' j: R" b - let frc = Resources.getFontRenderContext();
3 I$ a# ^- G6 S. X1 ?( d( j - bounds = font.getStringBounds(str, frc);- S1 m% b1 s/ e# z0 m4 v' L
- return Math.ceil(bounds.getWidth());# \& U; c- D! }3 g# k) ]
- }
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7 ^0 h; x2 K; w- i7 p8 s! U q- da = (g) => {//底图绘制! U8 ~) [8 L; Z5 r
- g.setColor(Color.BLACK);
3 N. ]* `3 n4 d. m9 D6 t' }" u P - g.fillRect(0, 0, 400, 400);
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0 ]& A; x) O' M) t- db = (g) => {//上层绘制 p) a, C- U2 B# }" v3 G1 [" M+ b
- g.setColor(Color.WHITE);
( b) R9 |5 y1 `; L) I% r! d. G$ M - g.fillRect(0, 0, 400, 400);( n, ^/ W' U" w* ^5 F9 U+ {$ {( A
- g.setColor(Color.RED);
( R6 U) Q& x9 g, j$ Z# Y4 V) F - g.setFont(font0);
/ Z3 f( K8 a; |2 p4 ]6 I - let str = "晴纱是男娘";
' k6 |8 C: Q2 D0 z( { - let ww = 400;- e; i- Z0 `, I! x7 [8 v% c( q
- let w = getW(str, font0);
7 L. D# w0 F) k* _ | - g.drawString(str, ww / 2 - w / 2, 200);" E1 s- w$ O; {8 m: Z2 ]3 w
- }
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- const mat = new Matrices();
8 i& z \. y0 _7 L4 ? - mat.translate(0, 0.5, 0);
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r/ D q- L: O) M& L- function create(ctx, state, entity) {) V% O$ V7 B7 Z$ h! [& ~* [* a% \. k
- let info = {. ~6 \" k$ ?2 m# u) L
- ctx: ctx,
. o8 h0 l# C/ D9 z* _% U8 j* o - isTrain: false,
1 ^' Y! n, ]4 C: d6 x p$ ~( V) [ - matrices: [mat],
3 t' f4 I1 ?1 J- l' A d8 X - texture: [400, 400],# _4 R2 K' S; m
- model: {
. `- O$ T- h; }) E& \7 L' J - renderType: "light",
8 ?1 Y8 T8 `* n$ y, C - size: [1, 1],% A# y- l C; ]8 O8 s6 m
- uvSize: [1, 1]8 |9 J) ]2 G& V* Y3 i4 U
- }/ g* ?0 n2 ~# R8 {9 X- Y
- }1 x6 }7 o3 M( l6 u; Z X' y
- let f = new Face(info);- B0 f C( [& }. b v' }
- state.f = f;5 ~0 H1 F5 |9 ^6 k; ?7 J
- 7 w' Z3 ?) p7 B
- let t = f.texture;
' d# B6 }. }6 s, Y$ L. T - let g = t.graphics;: p- c/ N, u4 a
- state.running = true;
; @# U3 q3 N% Q; b- S* D - let fps = 24;
) _7 x; k4 H: W - da(g);//绘制底图
: N# [. c" U5 L, c. u - t.upload();
( ~7 F, S" O j7 B( s% d. F$ ~9 N - let k = 0;* C ]6 o, P- H( d
- let ti = Date.now();
: t1 ~5 ^1 @0 k" v3 i9 [ - let rt = 0;, ^, [+ \2 w! m! {6 z& v
- smooth = (k, v) => {// 平滑变化' y) R5 b5 K# R3 e4 v* O
- if (v > k) return k;6 l9 K: x0 ~7 R
- if (k < 0) return 0;- [/ w$ I0 {8 P7 y. l+ o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 }: N( r& w8 P) G5 F Z - }" N" l+ C0 \5 r! M
- run = () => {// 新线程
1 W6 J/ z3 H; d6 _ - let id = Thread.currentThread().getId();( \7 t# k; g `
- print("Thread start:" + id);
5 | [% g+ w6 q2 ~ - while (state.running) {
9 u6 V. w" p3 l, r" P - try {2 B% b5 o9 t6 P; ]4 F+ ^0 N* M! i
- k += (Date.now() - ti) / 1000 * 0.2;
1 N' A: L- P) z: U* X0 w. q$ S+ H) v - ti = Date.now();
; q8 P. F8 V. r+ R - if (k > 1.5) {
9 V4 y2 f) f. I; A6 ?) { - k = 0;4 k; I# K3 e/ _# p
- }
( C% O D) s. F# `. ?% { - setComp(g, 1);7 Q" G* l: r% w/ z( b
- da(g); O/ s* Y/ {8 H9 u y l6 X
- let kk = smooth(1, k);//平滑切换透明度
( t5 J0 o5 B( x - setComp(g, kk);
' Q8 K8 D9 R q' P: g7 N$ D - db(g);
t4 P0 \% o2 R& I1 J | - t.upload();
' N6 [/ Y2 v* s; Q* a' M4 z1 y4 k - ctx.setDebugInfo("rt" ,Date.now() - ti);7 u- |6 y7 s$ d/ r, F6 G& V1 x% Q
- ctx.setDebugInfo("k", k);
@4 ?8 C: h( Z. C$ _# I, ^* G8 s" y) c - ctx.setDebugInfo("sm", kk);4 X- W1 p w4 J2 t( ?6 ~: q3 \
- rt = Date.now() - ti;4 ]3 x7 W1 m$ j
- Thread.sleep(ck(rt - 1000 / fps));
* [; w/ u' d. y, D0 D - ctx.setDebugInfo("error", 0)
$ ^4 k- f" K8 @) B# S/ e7 e0 ? - } catch (e) {
( ?0 ~4 \8 @7 N; ?& ]$ q - ctx.setDebugInfo("error", e);
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- }
% j6 I" f4 {0 s0 }# s - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
8 i$ J/ `+ ?. O5 i- L - th.start();4 e/ `7 `9 R& y6 @
- }
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$ q$ [9 b1 T6 u/ t2 ~- function render(ctx, state, entity) {
7 J' T! `' P, p8 F - state.f.tick();6 @2 _7 ^# y5 d' n' k# v
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0 e# \) E7 m% w7 ^2 r0 f' M- function dispose(ctx, state, entity) {
: Z) h. h1 u. I& H - print("Dispose");
5 K ]; V8 G: ^9 G/ ] - state.running = false;! ^' M. s1 {: r' R, S; N% h5 b- ^
- state.f.close();
& T3 c- w% e7 N2 ]; N& }; s - }
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8 S6 _& n$ D1 D3 Z7 S$ X! T- function setComp(g, value) {
8 J, p6 c- |5 u: j" S( {& H( @8 H - g.setComposite(AlphaComposite.SrcOver.derive(value));
/ |5 a0 H2 _2 l; l6 W w6 \, P8 V7 x* S - }
复制代码 ' d, H3 i$ S8 W4 j4 q9 V1 u/ w5 V
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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5 H3 q" |1 n' y1 ?2 K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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