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' E" ~* j0 N A6 o+ a2 Q! f" Z5 G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。
# O2 ?8 d3 `& a, _5 j' N- importPackage (java.lang);! X/ [% C! R3 |0 V; ~
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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9 H# i2 _, q# X- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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f# I3 t# {! m) a* t! N" p- function getW(str, font) {
! D! ?# |# E0 K+ N P# e - let frc = Resources.getFontRenderContext();, q. e* E" I5 P. R" m
- bounds = font.getStringBounds(str, frc);
8 I x2 ?" X" w, { - return Math.ceil(bounds.getWidth());2 z% {. W- `! Z2 I; U0 ?8 ^- E
- }
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+ Z% Z& p7 O2 i9 l3 A- da = (g) => {//底图绘制! {2 ~3 @9 ]' {* E% G
- g.setColor(Color.BLACK);
; k$ ^4 U+ D$ X% Y( `* K3 ? _- _ - g.fillRect(0, 0, 400, 400);5 F/ J+ k M9 S, b" ?0 E
- }
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- db = (g) => {//上层绘制6 U4 B7 e) n/ j0 t1 x/ M
- g.setColor(Color.WHITE);
, I5 f1 N" S. ?3 O, A - g.fillRect(0, 0, 400, 400);
/ I( p/ O1 V1 V \+ E2 a - g.setColor(Color.RED);
7 y& T% T4 S' } - g.setFont(font0);
$ W: U& Z) b+ R9 [* h, k9 H - let str = "晴纱是男娘";4 F# ]: h. t! p7 `
- let ww = 400;
# K4 d' c) t* Y, {# A" x - let w = getW(str, font0);: y2 p: Y* J; s7 k8 G
- g.drawString(str, ww / 2 - w / 2, 200);. n0 w9 O2 b/ w$ q) d( F
- }
/ t- W8 Y# P1 T: @4 E+ g
7 j7 J U8 W# |7 g$ x- const mat = new Matrices();/ {* v& Y# X6 c/ I
- mat.translate(0, 0.5, 0);
% w" m8 W3 [! U6 w( Z% p - , M5 I4 I# P/ S4 j- ?- }
- function create(ctx, state, entity) {9 d' D9 n! O5 d7 N" o
- let info = {& n( n; `4 r. H0 E2 I* c4 i
- ctx: ctx,
4 j. Z3 `1 U* x7 R, n; D# O0 m3 M - isTrain: false,
+ X* S: z; d8 b - matrices: [mat],
" J4 }( ~5 o+ q6 c, S - texture: [400, 400],5 M9 _" E% ^2 I- r7 s, T
- model: {4 m: z% A' m) K- E
- renderType: "light",
7 b$ g3 E3 s# k r% ] - size: [1, 1],( Y; Q( @0 f8 ^' k( j
- uvSize: [1, 1]' Z) [% N8 m- C1 Q. M
- }
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- let f = new Face(info);, }- j) t- _6 o5 f
- state.f = f;
1 v3 s3 o* R5 m; {) {# R. p1 ^; R
( m M( i' x% |* o' D: z- let t = f.texture;
8 a8 d, r: x# [; w2 n5 T/ n - let g = t.graphics;
) U( P% j4 z# m9 p2 k) f3 a' M9 U - state.running = true;
' b# R0 M6 V* {4 s3 M0 e0 g# L# s - let fps = 24;9 F# y4 M. C- Q" h7 E0 s4 o: f; N$ X
- da(g);//绘制底图
: d! n; {$ Y3 {$ n: } - t.upload();
3 F" j; Q7 |/ H9 K! {1 v7 x - let k = 0;
: h& }) X! O( w6 f3 P: R2 f - let ti = Date.now();: y$ M$ L! @# w8 o6 p, S4 r
- let rt = 0;
3 }. o6 P( x, k3 H2 d, [4 O/ r - smooth = (k, v) => {// 平滑变化6 g! I/ C# e! ]6 a2 ?
- if (v > k) return k;
& Q7 v f5 C9 Y3 J6 ? - if (k < 0) return 0;
" M9 y" B# O- i( O; i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 ~0 F2 w! U: \( H8 A# r8 r, i; F
- }+ u0 A2 `' Y0 V$ H) n
- run = () => {// 新线程
5 q3 ~1 n$ c) j' _* J3 L - let id = Thread.currentThread().getId();
8 R# O. g% q. ?0 o* _5 J0 o' r8 u& m - print("Thread start:" + id);
8 u0 I' D: _: [$ Q1 d/ @& b - while (state.running) {% }+ p: n$ e# j4 Y0 L# a$ k
- try {1 [& i! C# g+ Z
- k += (Date.now() - ti) / 1000 * 0.2;5 f2 E9 W7 \1 s% ~$ w' D( v! f' ?; n
- ti = Date.now();, w6 Z+ T# O3 {& P$ D! w7 J
- if (k > 1.5) {6 p) P! {: [7 A2 e; k/ ]
- k = 0;: y8 U, y: R F* f* c
- }# x. X% p! I5 j' V
- setComp(g, 1);
4 p/ j: L, A0 O9 S- S* Q& [6 f1 h - da(g);5 U$ t7 S' d$ Y! @
- let kk = smooth(1, k);//平滑切换透明度: ~+ \- ?& o0 W/ _2 p. n1 N7 P
- setComp(g, kk);
. r: k3 I7 e7 N9 x2 k0 W - db(g);
( j/ P% f9 P) J4 | - t.upload();4 l( _& y$ }; V9 A
- ctx.setDebugInfo("rt" ,Date.now() - ti);
* i; l! U3 s3 C& p) X% F6 | q - ctx.setDebugInfo("k", k);& y2 ], [8 _+ a/ }, ~
- ctx.setDebugInfo("sm", kk);7 U8 [6 D/ b, F9 `" F
- rt = Date.now() - ti;
) O; S' N7 x! N3 |# j4 }0 J/ }( z - Thread.sleep(ck(rt - 1000 / fps));/ H& T) c) Y1 C# S+ P
- ctx.setDebugInfo("error", 0)
. t4 z( g0 c; A. s& Z+ x. T - } catch (e) {
* l' B3 @1 o8 X1 }' N5 r; q - ctx.setDebugInfo("error", e);9 F$ s6 m( i j" Q
- }# q3 e d! U2 _; H- F% F+ M
- }, ^2 e/ l/ [: d9 @
- print("Thread end:" + id);
* X% V) w% F4 ` - }
- e# T+ e* W/ F0 h - let th = new Thread(run, "qiehuan");' N+ x. i& x0 Q( H. K( \) @
- th.start();( }0 x8 b7 e4 X2 ~6 h6 L
- }
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- function render(ctx, state, entity) {. c0 a8 }; S |9 X: j
- state.f.tick(); @1 j! f+ L% I( l
- }
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+ H$ |6 r! b' Q, P2 `+ f! \: }- function dispose(ctx, state, entity) {
: ^& |! u' C5 C* n9 @ - print("Dispose");# M. k& ?& h7 O. T6 o5 j
- state.running = false;
9 R- ?/ v7 d0 r/ _8 S U2 q* J - state.f.close();6 f6 D3 M4 }1 N3 b+ W
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- 3 q0 ]* b. s$ U: f; q
- function setComp(g, value) {# n V1 k' d: |, Z
- g.setComposite(AlphaComposite.SrcOver.derive(value));
( s/ U& D* n, _- {7 J1 u. c - }
复制代码
0 S# w! k, l# 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。
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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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