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; @ j3 W) M `6 ?' ?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。% {+ M0 ?, a4 `6 y
- importPackage (java.lang);
( f9 V U/ l; w+ B2 I - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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$ Z# ?+ M7 h4 H. y, ], L" J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- z+ B7 c; }! V6 K4 {$ V. I) ]$ W+ I- [ - $ d4 G1 o; ?8 G/ t4 P9 ]/ _
- function getW(str, font) { C1 i5 c( C D
- let frc = Resources.getFontRenderContext();* J$ \+ t8 d( ]) q* a7 _0 h& x
- bounds = font.getStringBounds(str, frc);2 @4 Q4 O: L3 @5 i
- return Math.ceil(bounds.getWidth());. G" D4 t: b7 i( {# e9 E: j
- }
. i+ l! C6 F2 K: ^ - , A/ n, [% S5 d8 j+ b3 T2 V
- da = (g) => {//底图绘制
" w7 `3 D5 P4 q5 [+ W" S; q5 y - g.setColor(Color.BLACK);. G( X8 c! q# L Y0 w1 S4 |
- g.fillRect(0, 0, 400, 400);
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- : j- t: b* R9 [/ }! s; I% G
- db = (g) => {//上层绘制1 |$ t# z9 Y$ }7 [( A n
- g.setColor(Color.WHITE);! U) W0 I- {; f; C7 o
- g.fillRect(0, 0, 400, 400);
9 ~2 j" {, c. g+ v. ?2 r* X - g.setColor(Color.RED);; _6 H" I' i! j1 j7 _' a
- g.setFont(font0);7 U9 o( F' _9 m# U; T
- let str = "晴纱是男娘";9 ^0 V8 E9 \- Q, x2 Z0 |, c
- let ww = 400;* i, X2 Y! Y$ D1 ~" `
- let w = getW(str, font0);3 W: X4 l2 a f8 M
- g.drawString(str, ww / 2 - w / 2, 200);
5 c9 R' U; v$ A& y l7 x - }
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F+ r5 b# l! T* w/ B- V W- const mat = new Matrices();
( @! w9 [8 g c2 F! { - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {5 U5 Y3 c% m ]. D; ^* q9 F& m- a
- let info = {% S0 G$ W6 P0 ~# u$ f B4 l
- ctx: ctx,
9 q8 T" @5 z& S1 w4 t - isTrain: false,; T+ F) N6 F9 S
- matrices: [mat], a! N8 `1 t0 i
- texture: [400, 400],
2 U G8 T' |' w4 U- B - model: {. a/ `- n) J% R+ B" b# p
- renderType: "light", {4 v. B0 W# u3 [. a5 e- i% g
- size: [1, 1],, P' Z% V( Q( D, m1 I3 }& ?5 r
- uvSize: [1, 1]
# ^& E. y9 z: y - }
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- let f = new Face(info);' t5 q2 A7 w/ z: U
- state.f = f;- K$ L# E0 }; d& A8 |8 o
' I& j. i3 {& j6 c7 }- let t = f.texture;
9 z3 }( W1 i6 `; P' N - let g = t.graphics;' [" P5 C) r' i/ {
- state.running = true;
9 u/ e: i7 \* o- L: n' S - let fps = 24;7 F- P9 v# l- J0 S
- da(g);//绘制底图$ h/ D2 I- j* y( X5 a9 }2 ^6 ?
- t.upload();
0 v1 c7 E6 ~9 }8 g& A. O7 i - let k = 0;
' f# U3 e% h# ^3 O+ A% V: Y - let ti = Date.now();6 O! t2 g' g$ D# b
- let rt = 0;
8 v) @$ R2 @: G% A" K# X: ]% ]* m - smooth = (k, v) => {// 平滑变化
8 S2 q- a1 F: r: c. s; P - if (v > k) return k;: e. z! a! I( J" K3 m p( G
- if (k < 0) return 0;
# ^0 H4 C9 X" e, n3 h - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
9 W+ y3 D8 o; [5 d* E2 O8 M: N5 x0 U - }
( c9 E8 b8 n( X# |" U! G% ^ - run = () => {// 新线程% q; h% B* l) O' J
- let id = Thread.currentThread().getId();
$ W% R4 ~, n2 l4 G! ~, s+ | - print("Thread start:" + id);
- |3 |. F. {* ?* s" s0 E' A - while (state.running) {
" j8 ]& i6 n9 V& N - try {
0 _% }* X/ x, P8 U' k0 t" x - k += (Date.now() - ti) / 1000 * 0.2;- S. w* ^$ N4 @% y0 h2 H7 @* C
- ti = Date.now();# D! v, y/ l- w
- if (k > 1.5) {, @! H% b! H+ i6 b$ D, i2 O% r' [
- k = 0;
3 o% ^# u2 n+ v6 A9 }. D* F/ s: j - }
9 h4 l- u, H+ l5 L% m - setComp(g, 1);
% m. x; l `0 S" Z - da(g);9 c3 G+ l+ P8 L) Y8 ~
- let kk = smooth(1, k);//平滑切换透明度' G% z4 P* p _( K: m* j4 @+ ~9 x
- setComp(g, kk);
; z5 t5 }/ l# |3 F0 L' { - db(g);, H1 K3 ~5 K! q
- t.upload();% s0 q/ ~9 g+ e5 K
- ctx.setDebugInfo("rt" ,Date.now() - ti);3 H7 ~4 V W. X- [
- ctx.setDebugInfo("k", k);
" {) E; j z- L7 J4 S; v - ctx.setDebugInfo("sm", kk);6 U S- q( d& ]3 X4 {2 t7 t- W7 J
- rt = Date.now() - ti;# ~5 j- y6 W: F9 W) R
- Thread.sleep(ck(rt - 1000 / fps));
) |& G9 z f2 Q+ T1 G- e - ctx.setDebugInfo("error", 0)
& z# Z! ? D( P! x7 S+ Q% P6 H - } catch (e) {3 ~$ {7 Z% G( j" w) p+ B0 S; v& B
- ctx.setDebugInfo("error", e);
, \' _* E2 L; e, W; t, N - }. o$ |5 ^# B" S2 H, S6 {
- }
7 |4 Y) j/ M# l. w; }' u! [ - print("Thread end:" + id);- G( a+ ^2 B \9 ?) [
- }
& l- R: Z1 }7 M! S4 h( j" n - let th = new Thread(run, "qiehuan");
7 A3 a/ P6 m3 y H" A( N - th.start();. ~# f( }+ Z+ [
- }
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- function render(ctx, state, entity) {3 U* e; c5 U4 T. j7 s- F
- state.f.tick();' {& b) t. A8 Z9 ~0 j) G
- }
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- function dispose(ctx, state, entity) {' Y$ F+ G5 |3 D; F/ |' h
- print("Dispose");
' A( d9 I) R% ]1 z) r6 [6 m/ [ - state.running = false;
! O" `3 q5 A0 f7 t' j9 } Y0 ^2 j - state.f.close();
+ ?, V: C' g/ N- @5 w) Y0 q - }6 Q, @% |* }6 F" N3 U1 O' Z
6 R- H: u! z1 ~, @1 u- function setComp(g, value) {# B8 b' K$ D# k& \, t* N$ j8 l
- g.setComposite(AlphaComposite.SrcOver.derive(value));8 @2 J5 C8 R# @
- }
复制代码 ) K$ K5 t8 n) |# {' r D
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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( _+ w, b; B( ]. p7 q顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! Y: p9 d \6 v
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