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& ^# u4 [/ |/ C; _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 K& a9 I4 S- V: R8 K6 O- importPackage (java.lang);2 X5 m3 b: j) E5 r) v
- importPackage (java.awt);
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( I7 _; r$ F; N- include(Resources.id("mtrsteamloco:library/code/face.js")); W0 S3 C# ]8 ?5 t7 m
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
# w6 W' `" k0 c' B, C: z' ` - let frc = Resources.getFontRenderContext();
) q8 N* i6 A; e$ \1 [; X g; } - bounds = font.getStringBounds(str, frc);4 E8 |( }" R G, N/ S
- return Math.ceil(bounds.getWidth());9 H) S6 b: ^2 R. A
- }" s; \. }: s8 X& L% s
4 l3 a" |* ^& n% S5 @" |- da = (g) => {//底图绘制7 t: d% `. M6 V9 Y' c
- g.setColor(Color.BLACK);* n& {! E* h7 Q
- g.fillRect(0, 0, 400, 400);/ T8 u2 {; t5 V
- }. r; F* v- }. ~: |7 |( q
q. J# v1 \5 W- a- db = (g) => {//上层绘制
( x+ X' G5 c E6 v! J0 I. Q0 ~! I) d - g.setColor(Color.WHITE);; r6 ?4 ~1 ^/ `, t3 K. J
- g.fillRect(0, 0, 400, 400);
; k- J8 }" O2 c' t7 @: T6 |6 w - g.setColor(Color.RED);
' z; C) ?! Q# J# c# x' k - g.setFont(font0);
7 j* `" S. o: k' q5 [$ J9 |/ J - let str = "晴纱是男娘";
1 i4 S3 c) F P. w5 E8 Y# U7 Q8 e- f - let ww = 400;
?; ]) O! V! o6 ?5 X S$ l - let w = getW(str, font0);
2 S! R% e) z* [# {5 U - g.drawString(str, ww / 2 - w / 2, 200);
4 g) |2 S6 {' J/ b% A: f: p. v - }6 @4 N" e; V) Z1 M) z6 h! G$ L }
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- const mat = new Matrices();" q" U0 y8 I- L( ?: E1 e
- mat.translate(0, 0.5, 0);
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3 R% @; K1 Y9 _( k- function create(ctx, state, entity) {
" K. W) K3 a6 B0 L% q' | - let info = {
- d3 k$ j1 z, s0 H9 e - ctx: ctx,. h) X. t7 B7 o" n
- isTrain: false,
" c/ R: y; e7 T" ^( C" Q' o! ] - matrices: [mat],
/ n2 L: P; M+ y5 {7 x8 y+ Q9 J - texture: [400, 400],! h! _0 O& }' V- L3 Z
- model: {# V& [1 F5 @# h7 O
- renderType: "light",
( t+ f9 I1 K, d) a2 f X9 y - size: [1, 1],
# a$ [5 h* d, B) M/ w - uvSize: [1, 1], g+ u- y% c6 c$ n: b" }6 x
- }
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- let f = new Face(info);$ w; B; l) g; k
- state.f = f;
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- let t = f.texture;) f0 A9 H/ L5 _) J5 _
- let g = t.graphics;& M/ e* d4 f5 j' {% i5 O# c
- state.running = true;
8 X6 D3 p& r, u8 k% u+ c1 V - let fps = 24;
' r* f+ Q% l; d - da(g);//绘制底图
$ f, ]- O, h' V y' M- S - t.upload();
0 S2 u! R" B4 S6 q$ ^# w3 y. ]& a! d - let k = 0;1 |2 E4 {9 a) W( S! y
- let ti = Date.now();8 X# }, L5 w9 ~, f
- let rt = 0;! s, n ]) u: C0 t
- smooth = (k, v) => {// 平滑变化
# E: E1 v& n c( r0 V8 F0 d - if (v > k) return k;
* G* j0 W; c; {2 ^. @0 ]- q - if (k < 0) return 0;4 V8 [: P, h6 P- O' t
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! m- D( ]2 \6 W& [2 M( f' V
- }% L! V/ r3 F7 O+ Y0 b# L
- run = () => {// 新线程
: l' G. v9 Q! L; f( k0 C - let id = Thread.currentThread().getId();+ m/ H: D' o/ ?. q+ G5 }
- print("Thread start:" + id);5 @ V6 k J G, Z
- while (state.running) {
. N0 ]% G" N) X9 S - try {+ Q# {) l" ~/ e7 q/ N( c) D
- k += (Date.now() - ti) / 1000 * 0.2;
% ?; g. F/ C2 E0 A5 @# s - ti = Date.now();2 i' j8 w/ w3 q( S) N7 Y/ L4 M
- if (k > 1.5) {
" Q/ T: T2 O3 }0 c- d - k = 0;4 G m- M( w* B1 z: Q
- }
! b/ s4 r/ H- E7 V4 J5 M - setComp(g, 1);
7 f. ^( o. @# Y, v9 P+ ^ - da(g);2 x8 U8 Z, o# F* R- F9 G$ \
- let kk = smooth(1, k);//平滑切换透明度
9 z2 }( g% y# r0 G0 X( m3 t6 I - setComp(g, kk);
' o9 a, s) z$ q3 w" S; Q: T/ Q - db(g);" j) F2 p% e( [
- t.upload();/ F) c- x, Y8 S- ?: w9 C$ W
- ctx.setDebugInfo("rt" ,Date.now() - ti);# ~7 X0 s s6 k9 w$ R: r. e4 E8 A
- ctx.setDebugInfo("k", k);
* s4 O! u& r t! C o/ w+ N% _4 u {" U - ctx.setDebugInfo("sm", kk);3 V+ ]$ X5 ~5 K
- rt = Date.now() - ti;4 q; ]/ K" f9 L
- Thread.sleep(ck(rt - 1000 / fps));
$ S; b4 Z7 M6 h- n" K) M - ctx.setDebugInfo("error", 0)9 Y" K. e, @2 [5 E3 [' I0 z% Q
- } catch (e) {8 u' U6 S' M% p3 ?3 m
- ctx.setDebugInfo("error", e);
! l0 h1 s7 [* b! }6 \; Z - }
% J$ f# c) j2 S5 m0 U - }5 n& b4 ^# a1 `/ H' h. |: g
- print("Thread end:" + id);- q) |# F. [( ?. q; n
- }% }) n$ M* W, y8 T/ X+ T+ I$ m7 C
- let th = new Thread(run, "qiehuan");7 j* }' h9 d8 }" ^9 v0 \- M ~- p6 Q
- th.start();
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- , Y! E! Q9 p1 K5 l0 `
- function render(ctx, state, entity) {
$ r9 c" p$ s- ] D - state.f.tick();5 A$ O$ V. ^' m2 I: V
- }1 _5 \$ V& i; `/ D
7 r$ H V# y. L+ v* \- function dispose(ctx, state, entity) {
* v9 K- o# b2 Q& v - print("Dispose");
" T, q" q2 R# ~9 D F - state.running = false;5 ~6 i6 ]' |- W# J
- state.f.close();1 O+ X2 [$ P1 n. A$ d
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' d/ P# @, ]. r9 n6 o- function setComp(g, value) {
7 I$ q: K7 P+ ?2 b" x# A - g.setComposite(AlphaComposite.SrcOver.derive(value));# t* I0 z. e3 P
- }
复制代码 $ }) z3 d ~+ o! t4 @3 }
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。3 y* f" n7 B j' V6 ~5 j6 h I G0 e
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( j" T$ {! |3 Y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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