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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。 _2 o" i6 t2 v
- importPackage (java.lang);# v- h3 J/ _7 W; B1 T1 {5 `
- importPackage (java.awt);8 X# z( d* ~1 u% @# x! y
- 9 @& V, T" ]. b+ t# f5 r7 U
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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3 t3 a6 x& Q0 _+ }: a6 n! G- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {! {- D7 j. w/ z5 f
- let frc = Resources.getFontRenderContext();
4 S# ~# ]- f( ^- v$ U* T - bounds = font.getStringBounds(str, frc);. n5 S7 U% h& Q/ m' r8 A
- return Math.ceil(bounds.getWidth());$ V9 E& Q/ D# B3 J& Q4 }1 q
- }7 ^" _" S7 I: Z- ^
- 5 \5 ]4 ~9 F& ~' G* l
- da = (g) => {//底图绘制
; s( q8 { e) z3 _, a( R1 x - g.setColor(Color.BLACK);0 b( o7 C" S2 S& h3 a, {
- g.fillRect(0, 0, 400, 400);
" C; S$ W$ F7 B: `7 E& L, H5 X% x - }
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- db = (g) => {//上层绘制
9 l7 h+ v1 j2 S" M' t/ @ - g.setColor(Color.WHITE);8 R& T9 i" Q8 F
- g.fillRect(0, 0, 400, 400);9 m' d( ^" H$ h- e
- g.setColor(Color.RED);3 P, @6 }/ p8 Y1 I
- g.setFont(font0);
0 {0 @5 C' I {/ N - let str = "晴纱是男娘"; C( D: q3 R0 L+ X6 y5 L4 Q
- let ww = 400;1 ^2 C2 c# A2 ^1 T, p* j
- let w = getW(str, font0);
$ L3 x1 h3 ^% T& f' G# E - g.drawString(str, ww / 2 - w / 2, 200);5 {) N4 w7 w0 X- ~" g' a! O. h' Y7 d
- }3 F- A: H; d" s- {; E+ }
. d% e8 B) }5 p; e3 m/ P- B$ ~8 J- const mat = new Matrices();
& x( p Q% H, V% p. q8 {/ Y" m - mat.translate(0, 0.5, 0);& I. y; g( C6 {: ^$ C8 q) s1 q$ B
- / i, H. q$ t2 y& } ^: Z
- function create(ctx, state, entity) {
2 k% T/ N+ Z- x, X$ H5 U - let info = {# Q. c8 m. o, b2 J: o
- ctx: ctx,8 [3 t) P$ M8 B! r
- isTrain: false," q ?3 t/ o$ Y" ~
- matrices: [mat],
4 B1 S6 L/ u1 C2 @% P/ u - texture: [400, 400],
) A( q9 T- B2 t+ ~' W9 M* o - model: {+ X1 N: w# H" T/ Q
- renderType: "light",& }% \# ~- ]- e; J. m7 N9 m
- size: [1, 1],; M% T. L ^! x6 w/ V
- uvSize: [1, 1]! n6 b# O9 x1 N
- }
% T; e) n; M4 Y - }
/ s- e& r$ ]- w( b& ^6 O V - let f = new Face(info);
6 B, a. D5 n% p: s8 M4 ?3 y7 Y - state.f = f;
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- J0 ~3 u$ w2 l! v* u( r- let t = f.texture;/ R% Y3 p5 `8 ]3 r8 [
- let g = t.graphics;) w7 t8 W$ j: P4 x7 s- h9 a
- state.running = true;
/ R' N: C9 J% x k. C - let fps = 24;: x: F( [/ Q3 u& i) U4 ?+ T8 @
- da(g);//绘制底图
. i( _! ?/ P5 v3 x s# v2 D& } - t.upload();7 r! N; n0 s* k" Q, D' H5 z0 [( s
- let k = 0;4 R* h6 T' ^' |8 {
- let ti = Date.now();
. H6 |* C2 q6 x; i7 N6 M1 p - let rt = 0;% r) ]* c- q: K+ o+ L
- smooth = (k, v) => {// 平滑变化* d5 W' t$ R) n1 u) c
- if (v > k) return k;3 M( p% I7 D+ @
- if (k < 0) return 0;
/ K' O# j, m. w1 w - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% I& ]4 a; H4 w$ d& E: o% g; |
- }3 r. b1 d$ x2 k/ [& i$ U7 X, |* C( M
- run = () => {// 新线程0 {: Z, g1 b" H8 c: w+ z I% ?
- let id = Thread.currentThread().getId();
3 N6 w7 v' P) R2 F - print("Thread start:" + id);8 u3 W& X; j5 S2 E) K5 K
- while (state.running) {
5 O# s# ^5 f+ D: a: ~" B - try {
N" q6 Q& G' Y" w - k += (Date.now() - ti) / 1000 * 0.2;
! C- y% {6 j, N7 W" ^ - ti = Date.now();
6 i; X6 z! g! ]4 s$ V& k - if (k > 1.5) {
6 D( A( b' a n8 M" h - k = 0;$ K" }% Z% `0 i9 h! L
- }
+ x5 Y9 m% A+ m; F0 V; X8 C - setComp(g, 1);
$ |' }" V1 x/ z: Z - da(g);) C! e$ P: J' f7 H" L6 l9 E0 p
- let kk = smooth(1, k);//平滑切换透明度
( |4 P+ ~7 W6 y! ?4 ]2 ~5 V - setComp(g, kk);
6 l, O# h1 e0 @1 }8 U$ L2 F! V) \ - db(g);
9 L9 ~' h; e' D( t/ o - t.upload();3 `# J$ b! \ W
- ctx.setDebugInfo("rt" ,Date.now() - ti);
2 r+ V5 R& j! w- a# H. V - ctx.setDebugInfo("k", k);+ Z) U- r0 U5 m6 d6 o
- ctx.setDebugInfo("sm", kk);
& S" j- \4 P" c: o7 i) o - rt = Date.now() - ti;% g I& @0 X: p0 [3 M& ~4 S8 K9 B
- Thread.sleep(ck(rt - 1000 / fps));
) E+ c4 O" p% Q - ctx.setDebugInfo("error", 0). j& e+ b. S% f* ~) D! c. `4 W
- } catch (e) {& I0 h) V, l+ o# G0 ^5 \; r
- ctx.setDebugInfo("error", e);1 {' H/ P" @: O2 p! ], D3 n- e- m
- }
8 `, ~; C4 N( o% h - }3 h# p8 u2 d, r. L8 ]
- print("Thread end:" + id);
. z4 i! I2 ?3 P) I2 u. p" ]& Z! R - }
# }2 Y9 B- W+ [& o" G - let th = new Thread(run, "qiehuan");+ J, M' o# j2 p- ^6 `' u
- th.start();3 l( d/ j! [' W& ^% W
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# A% @2 j: n: g/ O& V! Y2 W# e- function render(ctx, state, entity) {! B( h# w2 ?; i, S
- state.f.tick();! C+ L9 B1 E& M$ ]# r
- }1 C. z e T3 x! Q& Y: ?' _& Q
/ n4 {, W$ P" p5 ~2 v- function dispose(ctx, state, entity) {% r: v T$ t3 u, n7 G; n8 F
- print("Dispose");: N% g: u/ c7 B- M7 m: O# v! B$ [% D
- state.running = false;
8 |. v) c# e1 T+ P+ M* W - state.f.close();
3 M1 w0 m5 p' [, Z1 r( U' D - }
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- function setComp(g, value) {
, V; q" v8 {6 ?3 X& ~& p - g.setComposite(AlphaComposite.SrcOver.derive(value));! i$ x" z9 M& p( _9 J# j
- }
复制代码 / h; p! w( x9 D$ k0 q8 d2 X
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。 [- N$ H. X5 h1 e$ ~. X+ D
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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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