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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。
( l) w: F- q3 K" X) z0 e- importPackage (java.lang);" [0 Q" W. G# c# f' R
- importPackage (java.awt);
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+ A, ]9 V# N L- include(Resources.id("mtrsteamloco:library/code/face.js"));9 n2 ^& T7 t/ c- s/ A0 N u
- 7 J. T5 G6 [6 n6 q q M
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- D1 {: o9 q+ W. L
+ K( u4 e& e, I- function getW(str, font) {4 A F+ z4 o3 C( O, P. E
- let frc = Resources.getFontRenderContext();; l/ D9 [8 K7 X8 `4 [0 Z- w
- bounds = font.getStringBounds(str, frc);5 a4 U; B6 _2 M& e+ z6 E; [
- return Math.ceil(bounds.getWidth());6 S5 H5 x8 O. {. o) E
- }- n, \6 b' h, `8 J+ }7 ~
: s) \2 ~6 n$ n5 T8 _+ T7 i- da = (g) => {//底图绘制
/ i" Z9 {, L# H8 T/ k - g.setColor(Color.BLACK);
3 ~5 k2 A7 b2 r/ f - g.fillRect(0, 0, 400, 400);
8 ^* P9 g) d7 H( w - }
/ G* A9 B- x6 { - P# L0 v+ h/ e
- db = (g) => {//上层绘制* L; `& x& ^! p' B3 A
- g.setColor(Color.WHITE);$ E8 X9 K- d, T& Z& o
- g.fillRect(0, 0, 400, 400);
0 f6 |1 Q9 } M, J - g.setColor(Color.RED);/ r/ p1 F3 d2 G2 {7 T j
- g.setFont(font0);
5 H% K3 o: Y! x% x- y - let str = "晴纱是男娘";
2 @* Z* `$ A1 v7 n. j - let ww = 400;
! Q0 @5 X% T0 e: G# f - let w = getW(str, font0);) C' G4 w8 r4 f8 a' k4 u
- g.drawString(str, ww / 2 - w / 2, 200);* W Y1 r" P7 s) M: Q4 |, Y5 B' z
- }* _& J- y3 ^! G% `
- & K$ L& l9 K! f) E
- const mat = new Matrices();/ K% _% U* H! n- r h$ c6 h
- mat.translate(0, 0.5, 0);& f6 y$ \2 K4 q8 ?3 S0 |
- 0 q. f3 O- i! ]7 E8 I. V8 d0 M( w
- function create(ctx, state, entity) {
7 j$ v( \. I7 P) D" F8 ]7 l - let info = {. X" I" Y: _& E* H' V- d
- ctx: ctx,
3 N+ v' W; E! t - isTrain: false,
/ C$ Q& Y9 S* y: ~4 X - matrices: [mat],/ e* N. Q1 c- w7 h6 O% x
- texture: [400, 400],) F! X, C( ~7 T5 T1 f
- model: {
, Y1 \/ S/ [( t7 V. S* n - renderType: "light"," O) J$ d7 c& q3 k0 L0 J: b
- size: [1, 1],& e5 p8 G4 u: o8 N
- uvSize: [1, 1]
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- }
" p# z9 Y" P8 }" m5 G - let f = new Face(info);! T7 m. L" R! A% U6 |
- state.f = f;
% J3 P; s* _: ]' b, T' X8 e
; d8 `' E4 w# h( `! ~9 `7 x- let t = f.texture;
# x5 o3 S; g, j( g+ H - let g = t.graphics;0 w4 t0 ~# X! S3 W% \: v* d
- state.running = true;
% l7 |, ~- H/ U7 D - let fps = 24;
; L& b- A) i0 [1 J! s7 |$ D - da(g);//绘制底图
& c# z) c) v2 A5 B/ {2 C) ? - t.upload();
8 H7 o2 Z) W2 D/ h - let k = 0;7 w4 l, e( E8 X* d0 C& {
- let ti = Date.now();
) m( `* A/ a. s' Q6 e% W* v; D& t - let rt = 0;
7 K+ L3 F: I- T; y - smooth = (k, v) => {// 平滑变化7 S9 x/ w" D. R& h) U( U
- if (v > k) return k;3 T2 O/ ^- \# q6 }, R, r2 \9 R3 H
- if (k < 0) return 0;
, n5 |, `# f- p# N% O - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( K8 U/ x- G, e4 v
- }
" Y Y7 J) b- _1 i" ^+ u# N - run = () => {// 新线程- r( ^* Q9 M1 E3 _. N0 y: M* [: f
- let id = Thread.currentThread().getId();% n/ v' m% H3 C$ z5 N
- print("Thread start:" + id);
, M- b. F2 G+ |" r- A- K$ P - while (state.running) {/ \# d a6 l I3 @: f+ ]* ^( {
- try {
: r( N& i; @! r& S; Z. G6 I0 T: b - k += (Date.now() - ti) / 1000 * 0.2;
, u A+ ~6 n2 I- O. `& q, Y - ti = Date.now();
# ]! Q; J; `- [- s0 N0 ` - if (k > 1.5) {% {8 F* C; w. Y9 f7 T4 ^
- k = 0;
9 [& F$ B: N) ]7 E0 [ - }; E1 b8 p) w5 n0 l. E8 M5 U
- setComp(g, 1);
. H) Z' Y4 A% e, B }' D/ q8 K a - da(g);
, _6 N8 U. F( A" Y% l& w - let kk = smooth(1, k);//平滑切换透明度- Q, o6 J/ u y$ {4 ^
- setComp(g, kk);
, |- b+ Z0 U3 R% \# f. V: e - db(g);
. n+ j2 |/ x2 F - t.upload();5 A, \3 b5 H1 K, c: F/ N* f- |/ y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ K- J" q5 E) S9 Q' c. Y - ctx.setDebugInfo("k", k);8 w/ @$ S- Q4 M' i; x9 J1 u! m: p
- ctx.setDebugInfo("sm", kk);8 ]; O8 X8 F0 u( M# y
- rt = Date.now() - ti;2 V2 _0 ^+ c1 g, o
- Thread.sleep(ck(rt - 1000 / fps));
/ r8 Q! E$ I6 Z D% V- O - ctx.setDebugInfo("error", 0), Y" p/ K% }8 _# ^& I+ J: Z
- } catch (e) {+ b$ o( u2 F; t8 g1 \9 k% O
- ctx.setDebugInfo("error", e);' Y& v y) n$ t
- }
- g* n/ r8 B$ `$ c# i$ ?" [ - }
5 L5 G$ ?+ n4 d6 q+ J - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
1 ?# V& r4 z) V9 Q u: Z' N - th.start();9 ]( A5 v9 }2 \* T
- }' D# a1 p. c; w4 Y) b
- $ r9 n3 C3 |" N |0 }
- function render(ctx, state, entity) {( Y( C9 H! ]6 f" u2 N7 ^
- state.f.tick();
& t! h0 ^. E6 ?; e - }; |. k7 i- F4 @0 R0 X+ ]
- 2 F9 D, J% M5 E# P9 C
- function dispose(ctx, state, entity) {
+ e; |; I4 R# e t' d' } - print("Dispose");
( i1 q/ Y& X( c" N - state.running = false;, g8 i3 i% A9 v2 u/ M5 {
- state.f.close();1 A6 {5 s/ v/ }& ?
- }
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- function setComp(g, value) {+ O! b/ e8 X/ Z0 @$ r& ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% J8 a2 F+ r, H# r" S$ K# F - }
复制代码
! _3 s( C/ ^/ ] 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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& N8 d h: z& _) n3 I( {
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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