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5 Y3 [. a3 q4 a7 Z2 _' M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。! \3 ]) M( h$ Z4 d b
- importPackage (java.lang);
/ a) E5 s/ b1 A! s% ] k - importPackage (java.awt);
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; K3 v* C; p! r: U2 E1 h- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 \% w$ n* S" w( ?$ u% ?& e- X% X- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" K$ v5 u5 \0 B; T% s1 s9 z% T
) K L8 t r/ d, o+ `1 Z2 e# B- function getW(str, font) {
$ u" L1 J0 T# b+ L# d2 j8 ^, t - let frc = Resources.getFontRenderContext();3 z! g# d% u1 T0 Y+ K
- bounds = font.getStringBounds(str, frc);
$ n) q) o5 V, D1 x - return Math.ceil(bounds.getWidth());
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- 6 R4 |, v4 h5 R) b' r; \1 k
- da = (g) => {//底图绘制
: O7 ^* y6 t. O/ j - g.setColor(Color.BLACK);
8 c( _# g/ `, O& j4 y1 S - g.fillRect(0, 0, 400, 400);1 o/ C9 Z' m! {9 C
- }
5 B0 b- o. U" x
# T. J! s6 B C- |- db = (g) => {//上层绘制
) [- X* S% l4 B4 d' @1 c" n - g.setColor(Color.WHITE);% L- E0 D- ]' z6 H5 @
- g.fillRect(0, 0, 400, 400);
5 S! i3 ~; m* b7 `. U - g.setColor(Color.RED);
( ?' `# F7 H. E# R5 p v7 t - g.setFont(font0);9 m/ m! n* ]$ Z8 g# h2 }6 v
- let str = "晴纱是男娘";. I) X; K# p$ Z8 ]' a1 n
- let ww = 400;
8 y% n/ \0 F9 \; v, W8 z - let w = getW(str, font0);9 `# z7 A& ~# s7 v+ C
- g.drawString(str, ww / 2 - w / 2, 200);1 Z" X8 J- w$ q3 W2 y3 D
- }
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- const mat = new Matrices();4 ]$ a* w. F/ n4 q
- mat.translate(0, 0.5, 0);3 U' Q- D6 ~- `* V3 m, a2 v
/ L$ r7 s* ~: Z& Q8 x% I7 I- function create(ctx, state, entity) {
0 M$ J- @. k) `2 E% u - let info = {3 @( b; d( L' l2 W! B0 I7 L' N
- ctx: ctx,
" Q! e: i: |% L( i - isTrain: false,; q6 `) _4 d0 z$ k
- matrices: [mat],
2 @1 G, V: z: Q( S - texture: [400, 400],# a9 F5 R9 n1 }
- model: {
2 L5 U$ T9 L% [% H' E" q3 r$ L0 N - renderType: "light",1 Y% v% V# i$ v0 ]
- size: [1, 1],
6 z, `, S. R; p1 m5 S - uvSize: [1, 1]0 x2 o2 G3 } b: n6 I) t
- }! v6 H4 B; D, i
- }
. G; I. j4 Z- h1 K0 g - let f = new Face(info);
( v" w) M, o$ c/ ]0 A, `+ S7 r - state.f = f;
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" T. I+ F2 ^' S3 g; o; ~, y+ G- let t = f.texture;# M0 C+ H, N* s; w5 a, V
- let g = t.graphics;
% V- e5 m- K, K; a2 x3 c/ R( a - state.running = true;
7 _+ P) j' w+ N) p( I8 W# x - let fps = 24;
; j# ?. ?9 m1 o1 r - da(g);//绘制底图
$ p5 o E. {* R1 G7 l3 q, R - t.upload();
6 G# b8 k! A9 E; Z! U2 [; t - let k = 0;
' d0 }9 D1 j n6 ^' p - let ti = Date.now();0 ?9 h4 Z8 u2 Y5 M4 z, h
- let rt = 0;& j, F' `" m3 `# r# X/ V
- smooth = (k, v) => {// 平滑变化, E/ m& q. |, [9 M& F
- if (v > k) return k;
, t. w5 p' q" |- n* t6 _4 C ` - if (k < 0) return 0;
8 V; y* D* z7 Q$ W2 ~ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( z: W- C; } N
- }
9 a- H# p9 K+ C$ J - run = () => {// 新线程
% J: D5 {( ` Q0 ^ - let id = Thread.currentThread().getId();1 V1 n' s7 n% k: {+ C( Z9 V
- print("Thread start:" + id);/ l; Q& P5 t# N' `: q* W" u
- while (state.running) {
( N i4 g7 ^. K: F/ N" S! z ^ - try {/ s* f; J% o) y! N: y* Z
- k += (Date.now() - ti) / 1000 * 0.2;( @ V' q' B* k+ |8 Q$ V
- ti = Date.now();
2 U/ `4 u! D! a$ M3 I, l% y7 r2 } - if (k > 1.5) {
8 v( o2 X0 C- i& x0 s! R5 c3 W - k = 0;
% T; ^7 T$ S$ I% L, E& U, F - }
$ L" r8 F8 x0 f1 K. ^ - setComp(g, 1);& a; {2 u9 Z5 Z4 P' L. \) `
- da(g);
( F! P$ m* }! X - let kk = smooth(1, k);//平滑切换透明度
* r# _5 b- p6 {. n% N( B3 ? - setComp(g, kk);
7 Y# u% c+ x/ { N - db(g);2 g7 x1 ~' _9 V1 Q' ^7 [
- t.upload();
* Q5 g+ T3 L1 `# V! ?$ t ]% X7 A) I - ctx.setDebugInfo("rt" ,Date.now() - ti);( A& s" B! W0 [' P& L
- ctx.setDebugInfo("k", k);
f& A7 w9 v' ~/ k, U6 |8 O I - ctx.setDebugInfo("sm", kk);
& D% n r8 F& [; T - rt = Date.now() - ti;! G s7 t2 T% B2 M! s7 d f" F
- Thread.sleep(ck(rt - 1000 / fps));
" v/ `) T/ |! X- [! J3 H% C - ctx.setDebugInfo("error", 0)# g: e6 b3 p. A
- } catch (e) {0 W- q3 J% |+ Q2 \% p6 ^8 a: G
- ctx.setDebugInfo("error", e);+ L5 G* e4 T8 n2 R$ q! h
- }' O% `! v* O T0 F. f
- }
; h- \. w6 k, A1 H- |' D( G - print("Thread end:" + id);, `: A }- M& i9 p F& R. s
- }
& @& R9 k" o: R5 S R" X% O: P - let th = new Thread(run, "qiehuan");
# {: U% f/ o" Z - th.start();0 I6 }5 X2 Y! z8 }3 c3 O
- }; }' s! @/ i; w% q
- 3 s$ ]; ], m: i$ p6 E" c/ j/ \
- function render(ctx, state, entity) {
) }8 {- {# p( O# F% l2 K" @ - state.f.tick();
' Y/ a) y* @+ j! E8 R - }
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- function dispose(ctx, state, entity) {. N! ]! E( t! ?) s1 ]
- print("Dispose");
" @8 [1 @1 |3 A3 i0 q E3 ? - state.running = false;7 q% ^0 X2 [) A: i% P. R/ @
- state.f.close();% E* T. A0 n0 T( x$ b' v# S
- }
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- function setComp(g, value) {; a B: {7 a f
- g.setComposite(AlphaComposite.SrcOver.derive(value));
2 c' _% F% C% D+ s* |: R - }
复制代码 / F5 O0 b5 w2 _: y8 Q
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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% o( @) K- ~1 r. T( n# |5 G顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). O u. l3 j2 H- ]! k1 k4 c
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