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$ r/ b4 I2 u w1 F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。( K( W& f$ V6 D2 k
- importPackage (java.lang);; E& D2 U; X* W% M! g: `5 z
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));& O& p2 B1 w1 g( |: U) P
- 6 }0 Z2 f: x8 B/ v
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
4 _( Y9 I+ k# C3 E4 p8 { - let frc = Resources.getFontRenderContext();9 l: o) ~! M6 a, u4 F
- bounds = font.getStringBounds(str, frc);, A2 X+ a3 I: V: Y+ b0 `; T; |
- return Math.ceil(bounds.getWidth());0 O& S9 W, |: T' r/ j
- }* h" ], A5 D) L
- 0 i6 t$ a9 h2 Q8 L7 q
- da = (g) => {//底图绘制, B2 g4 p# k8 v: a. _
- g.setColor(Color.BLACK);0 l. a* h5 Z4 N- i
- g.fillRect(0, 0, 400, 400);& y- k- L0 D7 L+ W9 p, y
- }
: \) ]+ J# {1 [
4 R% \$ A$ Y. @+ O3 B- db = (g) => {//上层绘制8 _0 n$ d. \* o) L: x3 a
- g.setColor(Color.WHITE);4 r! t7 h0 F+ s- H3 I9 [
- g.fillRect(0, 0, 400, 400);
2 _1 x) T, @8 {: A3 e - g.setColor(Color.RED); Y/ V' T9 e1 F, Y" _2 e
- g.setFont(font0);
2 T8 m! d5 I0 { - let str = "晴纱是男娘";8 I* j7 g0 f/ _, V
- let ww = 400; q" J% u' H% U8 {* ]
- let w = getW(str, font0);
7 C& b: x+ s* T2 U* Q) r( t - g.drawString(str, ww / 2 - w / 2, 200);6 a# a4 s- ]" {! A# b3 l
- }" D# V4 ]4 s# n& N8 U
. Z, A" K9 t5 x* J+ |- const mat = new Matrices();
. E" ~4 f# z$ d' N* m7 U7 i* v - mat.translate(0, 0.5, 0);$ d6 E( O- S, ^. l. \
- / x0 j' m5 I2 O" d0 R$ v/ V
- function create(ctx, state, entity) {
& K5 K7 l3 z7 G6 j* [/ F - let info = {9 J! h# @7 T8 b& A% n8 ]
- ctx: ctx,& @' R- h6 J- r S3 t9 N9 R
- isTrain: false,
; Z8 v2 Q! i; [( ~' I5 A6 q - matrices: [mat],
. o; Q- k+ K4 d* j# ~! Q2 X - texture: [400, 400],
% f* w$ Q2 ^( T% B$ B) R N# x - model: {* I- Y2 ]' b) P8 ~$ J" |9 `
- renderType: "light",/ W+ g1 v% }4 O. l J+ ?/ }
- size: [1, 1],
4 y$ a3 f, k! w" r - uvSize: [1, 1]
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- }; C0 j4 I+ D$ v* y( z ^# t
- let f = new Face(info);
7 ~% S3 r7 l$ Z4 x/ `& L- H - state.f = f;
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- let t = f.texture;
! w2 d1 Y& I5 V# y - let g = t.graphics;
3 J5 a( d2 R* b - state.running = true;) v$ J9 v* h+ K1 J6 O, x. P1 q, `$ e
- let fps = 24;8 _0 S9 z* Z0 X/ v
- da(g);//绘制底图
& x; T! F: o/ E7 G- v - t.upload();
3 d+ N# X- {1 h6 ?+ l" N - let k = 0;
9 D% K4 j' k1 f, f" w# ~ - let ti = Date.now();
% A# k! s$ e& P8 R# F+ S* U+ @ - let rt = 0;
* n+ @+ P( f+ S( u" d2 `1 i - smooth = (k, v) => {// 平滑变化
8 p. ]8 t2 G2 [4 `. R - if (v > k) return k;
( @+ u5 I. N- T# m3 m# j$ _ - if (k < 0) return 0;3 }3 {$ f" w5 A0 ^2 y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' W1 ~, l7 [+ C' w
- }
) C$ m8 ^9 v2 S S% p0 Q5 ^ - run = () => {// 新线程2 M' n6 J& N0 t0 d
- let id = Thread.currentThread().getId();+ t+ {, D' n' V3 O6 _% ^
- print("Thread start:" + id);) i4 d$ Q$ R2 p
- while (state.running) {: q4 I" y% x. p; k0 f ]+ K, Y- P
- try {1 X5 U' c c) o1 {2 R, D5 Y% n; |- Y
- k += (Date.now() - ti) / 1000 * 0.2;/ N! x; Q2 V) _$ Y: {% o. W, g
- ti = Date.now();, \+ e" C- n% A4 _4 t8 T1 c
- if (k > 1.5) {# h7 p/ f- c6 D, S$ c
- k = 0;
}% x2 W$ F! V- n( n! W - }
% T, \% l( o/ g1 m+ \& z - setComp(g, 1);) j6 G: ]. o* a6 S& f
- da(g);# s z) n0 c% L0 [
- let kk = smooth(1, k);//平滑切换透明度
9 b h) x& U/ C - setComp(g, kk);
& U' G4 C5 ]: W - db(g);. e" l# [% Y4 V! x4 r. a
- t.upload();. m7 ]; h/ k; I% s& {8 h
- ctx.setDebugInfo("rt" ,Date.now() - ti);
4 h$ ~ ~4 I' w C$ _4 K" D - ctx.setDebugInfo("k", k);
% S& _3 ^1 z: F7 s% J7 c3 \ - ctx.setDebugInfo("sm", kk);
# s8 y8 m- V- w& t - rt = Date.now() - ti;
9 ~5 r4 c3 ^. a! ?& f( _2 B - Thread.sleep(ck(rt - 1000 / fps));5 H; Y0 v; d& { b! D$ s
- ctx.setDebugInfo("error", 0)# U6 I' O: j; a2 } U2 d- ?+ J
- } catch (e) {
8 i: ?# d6 q1 \+ G+ x - ctx.setDebugInfo("error", e);
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- }& G! J1 o! Y k \5 I. _
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");; n0 \1 L" s: K# u
- th.start();' D/ d5 u) ^5 v& F8 v1 m
- }
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- function render(ctx, state, entity) {
) V. X4 D, M M7 J, N! I% B - state.f.tick();
. a" d8 h5 P5 M! h! x - }
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- S& J; h/ Z D5 m: E, ~9 k- function dispose(ctx, state, entity) {# }3 b) ^6 N: d# W9 K( ?3 P2 K
- print("Dispose");0 z' M) b' t9 Q7 g
- state.running = false;
7 A& Z7 n2 _& U+ w! l) t - state.f.close();1 H1 O1 e3 F' a$ }8 {( ^7 j! i
- }
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; C4 l/ i( B% {6 P& |8 g- function setComp(g, value) {/ X" |7 m# u. `6 [
- g.setComposite(AlphaComposite.SrcOver.derive(value));; j0 h/ h- u' g, A
- }
复制代码 0 Q( h, Z8 a7 G2 S: a+ J& |8 n
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。( f0 D2 w* ~; O
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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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