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4 r" Z; x) Y. X. w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。7 e! Y# y/ I6 j" V- p
- importPackage (java.lang);, B1 V2 ]6 w1 ^% i7 c+ Y
- importPackage (java.awt);+ H+ V+ P# X& q
[, l& i2 P! Z7 w0 b: n* Y# Z- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
% x: F7 u; i4 X
, }5 e3 k, e1 Q# I2 E U! G- function getW(str, font) {
/ E5 ^- t% ~) G - let frc = Resources.getFontRenderContext();
* d9 [% j3 F0 } - bounds = font.getStringBounds(str, frc);1 o1 C) z( |2 V1 E
- return Math.ceil(bounds.getWidth());4 Z# z# q) p' Y5 Z9 r0 ^
- }+ a* o! S0 Q) ?) I2 w
! Q' z* U7 ~0 E( ^- da = (g) => {//底图绘制
8 r5 e% o* q6 p* E/ r) r7 l1 p - g.setColor(Color.BLACK);6 @" Y& c# ^6 A6 O- s3 G
- g.fillRect(0, 0, 400, 400);
" _; d# D( u0 G - }
5 O: y! o- O% u {- Q: X/ I - 9 z4 V& U9 r, J
- db = (g) => {//上层绘制
$ Z8 ^0 F' W' p8 p9 L. S7 [4 G - g.setColor(Color.WHITE);* A4 Q4 S d1 |1 C+ H& H0 N
- g.fillRect(0, 0, 400, 400);/ Q* e+ L7 l$ a
- g.setColor(Color.RED);; Y" }$ T i1 G: j- i" |# y* A
- g.setFont(font0);
, ?1 s2 V! x2 s- Q' q$ K - let str = "晴纱是男娘";3 _7 S+ {# c" o" W+ d9 \) ~
- let ww = 400;
) b/ V* k* ~5 M3 t- U5 L! R: ` - let w = getW(str, font0);
* C" @) l! C8 i7 s - g.drawString(str, ww / 2 - w / 2, 200);
' m2 j3 G7 V- m - }
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& x/ x( b. ~1 ?. ~; {0 L7 f- const mat = new Matrices();9 n# K; T. f* t& m$ o) P
- mat.translate(0, 0.5, 0);8 d3 Z& U* \1 Y: j
- J0 |2 ` W, O4 p/ m- function create(ctx, state, entity) {
& E( Y' s+ Y: u- `3 {+ w4 V' d* S - let info = {
# b% u1 t( ]( D) v2 k - ctx: ctx,
# T9 N7 l2 e8 X; _2 g - isTrain: false,
, x4 K" F: q- d5 P9 J+ S - matrices: [mat],7 t7 p7 W* W' N
- texture: [400, 400],& a' C. l7 \- Z3 ^# S; i
- model: {( G% z8 r) _. A
- renderType: "light",
5 e5 {8 ?6 t' H: H$ k - size: [1, 1],! p9 v7 L- r; i O' ^ k" H
- uvSize: [1, 1]
3 Z5 N( s2 @- s: } - }
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- let f = new Face(info);
5 l, z B9 }6 x) S5 ] - state.f = f;$ \9 Z% {" ^7 u1 Q% |
- * |, M& u! L/ a( W% m! A" C9 V0 i# D
- let t = f.texture;
% L5 S) ]5 A, M7 _0 X) ~9 I0 I' { - let g = t.graphics;) `9 t. V" W9 o8 l0 _
- state.running = true; v% @( j: z( q) M/ F+ k
- let fps = 24;/ v0 t1 R6 O8 T, W. b M
- da(g);//绘制底图' `7 B D8 s/ k4 q
- t.upload();0 a9 k9 s& c, o+ v* f
- let k = 0;' t+ H* b: L6 o% w) D* R: _
- let ti = Date.now();
* r, W9 O7 w* _8 F' [ - let rt = 0;3 Q5 {: Z/ w/ D
- smooth = (k, v) => {// 平滑变化9 R; _; V, d2 g0 g8 G8 }/ [: v
- if (v > k) return k;
h" [+ s) q, h1 G7 P - if (k < 0) return 0;# x9 u3 ` A4 R2 w, _; P" _
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- j% Q) n3 g7 p; n- h - }2 g% @, D/ J/ @" x7 @+ f2 v# f
- run = () => {// 新线程! X4 _/ u- q6 z; c1 F$ m& n
- let id = Thread.currentThread().getId();
2 a8 `2 n& M( o - print("Thread start:" + id);
1 T. s) j4 N: j" P8 B - while (state.running) {
- E4 `4 j7 C- m1 [ R8 g. ? - try {
( t3 @6 M- D, [5 y/ t( [ - k += (Date.now() - ti) / 1000 * 0.2; `. ^# g& Q* Z
- ti = Date.now();' V- T( N7 X" ]' L4 y
- if (k > 1.5) {. A2 z& W$ E4 X" L- {, I j/ V
- k = 0;# r2 D& {! }0 ~; t
- }
% B0 E3 p( o( L# R; r2 z - setComp(g, 1);
9 a/ a" _" n7 H& K, r3 _+ P9 E - da(g);- U/ C. l" I" f5 R, R. ` I# p, Y
- let kk = smooth(1, k);//平滑切换透明度+ d$ k. D$ G- y8 l- t0 g5 a
- setComp(g, kk);& F9 I- A) x( N1 b4 R. n/ P
- db(g);
- [$ ^* f3 x R% l - t.upload();3 q3 I. ~: s( Q d; z
- ctx.setDebugInfo("rt" ,Date.now() - ti);3 C$ U C, \' B7 m. }
- ctx.setDebugInfo("k", k); q4 z) E/ C, l' o2 Q( m0 |
- ctx.setDebugInfo("sm", kk);
( x! B' e! a$ t( V& O3 m& U - rt = Date.now() - ti;
' X0 P" `! B. U8 q - Thread.sleep(ck(rt - 1000 / fps));( i' V3 U% L7 V4 N. r8 o% V
- ctx.setDebugInfo("error", 0)% C. f \6 k1 U$ w7 w
- } catch (e) {
- C5 t: _( H( y+ ^- c - ctx.setDebugInfo("error", e);+ P3 j( _) h% l5 ~9 B
- }7 I0 @* {; {) t$ M
- }4 g& K# n5 u: q w! o
- print("Thread end:" + id);# b p( X8 ^( [& K+ n
- }
8 r+ C& k, A0 c- h! N0 G - let th = new Thread(run, "qiehuan");
' h+ ~: b8 L6 _/ u( _1 x - th.start();
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- ( B% b1 L& m( q
- function render(ctx, state, entity) {
0 j: C; @0 ^! R0 B - state.f.tick();
3 }4 ~6 i4 G/ ~/ j - }
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- function dispose(ctx, state, entity) {
3 _! k, N- i, E& H6 o - print("Dispose");+ l% A5 B/ A" b( Z# o5 O/ Q: e
- state.running = false;; ~$ l9 a1 D3 p7 D7 G+ [7 Y0 T
- state.f.close();
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7 U7 N; t, g S( u- function setComp(g, value) {' M7 A- O" j" |# v0 J7 \6 Z1 |( n8 h
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 z, ~# C$ i3 q - }
复制代码
. K. _' d4 F: K$ E) f: J$ v9 \9 j3 Y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)- A$ H0 C+ D! Z: H* q1 ?" ?
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