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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。
4 q4 n) I6 ~$ \* V+ p- importPackage (java.lang);
9 @- n% e6 J' u; ^& t- _ - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( c }, Y4 V0 q* L% p% e0 X- T* ?+ c# p# h
; [" B! y/ T) J5 @# V3 { K( S5 _" I- function getW(str, font) {; P, Z0 ~9 {4 i
- let frc = Resources.getFontRenderContext();
* D0 q- v( R( l/ n1 u - bounds = font.getStringBounds(str, frc);
- x& M- o% Q, k, k' G - return Math.ceil(bounds.getWidth());+ Z' L |3 E/ K# j/ }" `* }
- }) i7 V# W/ ^ Q# P0 V" s* L
# ^9 S3 P& F6 N7 [$ Z4 T2 P: t- da = (g) => {//底图绘制
' n9 F a4 b/ f1 M% s. x) C - g.setColor(Color.BLACK);
?0 e) ~7 w7 H1 R2 |5 P. a+ L- D - g.fillRect(0, 0, 400, 400);
4 T7 n8 h$ O: s - }1 m! B) P1 P9 l) l
- ! k6 k0 ?$ ~% v+ r% m
- db = (g) => {//上层绘制
+ u8 c+ O* v1 \* `- I" v+ [) B w+ V - g.setColor(Color.WHITE); l! Z$ I# Z6 L7 P y
- g.fillRect(0, 0, 400, 400);$ V5 }4 U! L. B" J3 v' t- k
- g.setColor(Color.RED);
; A$ b0 r1 u# M# M. R% Q* ?5 g - g.setFont(font0);) C( p/ l5 g/ s1 {- W, m
- let str = "晴纱是男娘";* C0 k# h# u/ u
- let ww = 400;" Z6 j. ~. _" O8 A
- let w = getW(str, font0);" d$ |$ S6 s; C- y
- g.drawString(str, ww / 2 - w / 2, 200);; W+ P$ K, N# t+ C1 M4 D
- }7 M2 p2 S; I0 N
- - ^7 ~- ~; [( a. u* L' g& L! B
- const mat = new Matrices();( F1 B% U" W x2 n+ O* V
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {0 A' t$ Q$ I. b! d
- let info = {8 _$ S8 v! T8 E
- ctx: ctx,
0 z/ B9 Y& n/ n" c7 k% O, T! T - isTrain: false,5 _ W, w6 Y/ o9 ^9 q: P
- matrices: [mat],
; h; B3 e* ] O6 a- m2 o9 N( H/ R6 Y - texture: [400, 400],
8 b0 i' {; A$ I8 M& l - model: {
0 g: C& F- x+ J# O- ? - renderType: "light",6 D( r1 p8 d/ @8 f6 @& r1 t- p
- size: [1, 1],$ f! J4 x; G6 x; j. l8 Y5 T2 {8 v
- uvSize: [1, 1]
7 S, B" d& U- C X/ n2 Q+ ?& O. F4 @7 Q - }
6 ?- r# g9 o, ^9 K$ p - }
$ N" |& e" E8 O2 [ - let f = new Face(info);% {2 ^' o6 U1 z o* x- x9 i
- state.f = f;
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- let t = f.texture;: i0 ^$ t' Y& U6 b+ @' d
- let g = t.graphics;
# |- D- w# |6 {: D" B8 j - state.running = true;: q" q3 ^. L! Z C
- let fps = 24;, H7 R5 S: X$ a4 J# J6 F$ `7 `
- da(g);//绘制底图) h' l) S2 ?4 [+ R
- t.upload();
2 C0 M' C1 l. p/ K - let k = 0;
, O7 N4 l! }% i# O8 z3 K8 { - let ti = Date.now();
{" F% m1 \" _0 B* M - let rt = 0;
8 M b# q9 u8 S* u+ P4 b+ ]/ y - smooth = (k, v) => {// 平滑变化6 {2 `) x7 ^' i j1 @. U: a
- if (v > k) return k;
/ R) y2 P" x2 x3 l5 x3 E8 | - if (k < 0) return 0;
' Q5 F+ \3 d% M N0 d - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: H. @- j# h v
- }/ L$ V% Q# [* {
- run = () => {// 新线程
4 p3 f0 Y% R5 Q/ t7 m+ k - let id = Thread.currentThread().getId();. v, R0 {3 _/ K! r' ~$ Q0 ?* R9 D/ U
- print("Thread start:" + id);2 h5 L8 Z+ q, A1 D
- while (state.running) {- ]& J2 H9 G+ E4 @6 l3 l( X
- try {
. B5 A3 I6 Z4 i/ D - k += (Date.now() - ti) / 1000 * 0.2;2 h) C" l# c, R1 }; M$ B0 L* ~# O
- ti = Date.now();
# p8 O3 B8 s* H5 Q - if (k > 1.5) {. ?. i4 `) V s) H+ O. p( \
- k = 0;- }0 t" f2 n& O5 W5 L
- }1 b/ m, s2 I( X: D) d @
- setComp(g, 1);7 L' {: J+ q* ]$ l9 W
- da(g);
3 j: D0 W, c" v6 l - let kk = smooth(1, k);//平滑切换透明度& s p5 s; v0 F+ K
- setComp(g, kk);2 Y/ R- Q3 U# a! J6 j6 e
- db(g);4 ?" P2 t5 @ l/ z0 e
- t.upload();1 d' V: ?7 u0 Z4 `
- ctx.setDebugInfo("rt" ,Date.now() - ti);
* W9 \. i$ {* A N2 e - ctx.setDebugInfo("k", k);3 e3 x# I3 M. X( _0 k# U3 P6 q
- ctx.setDebugInfo("sm", kk);
" W% o$ Q: Y+ U% u0 z8 T% _ - rt = Date.now() - ti;% V b. }5 W- d+ Z3 U/ p) R
- Thread.sleep(ck(rt - 1000 / fps));
. M- h; ^7 D% c6 D$ L - ctx.setDebugInfo("error", 0)
# w3 R8 C$ N' l& V, R - } catch (e) {
1 m8 n, D% v, }6 ]4 N: W - ctx.setDebugInfo("error", e);' ]4 L' F9 w4 W/ H! J
- }" c: b$ V% ~- {+ }1 |! A1 e9 Z4 |' [
- }
$ I8 ^ R0 C# M x9 o7 h. ~ - print("Thread end:" + id);# L5 M6 i* ]; @( q0 X5 r( Q r
- }" g# I+ ]0 e% _8 O$ {. \
- let th = new Thread(run, "qiehuan");) O9 y" f: `5 F0 D
- th.start();4 y* R8 z& H! ]
- }0 O1 m8 Q( A/ i$ ~, v: F; B* h& t
2 ]9 }7 \1 n% {! z- function render(ctx, state, entity) {
* M+ R" |" o3 _, L - state.f.tick();
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- * p3 t9 w+ W; M; b5 V; L @+ @
- function dispose(ctx, state, entity) {
* `* ]4 R/ V$ Q' |* F* y# c - print("Dispose");0 x1 i) g, a# g6 \% e
- state.running = false;% e' ~% n- q' c" Q/ x! J
- state.f.close();, W* K k3 k, b, y- @! E
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- , m) H" C6 R$ J2 O! j% E
- function setComp(g, value) {
# e$ d% p- T3 N! U6 c! B" v+ t - g.setComposite(AlphaComposite.SrcOver.derive(value));
9 w$ P3 Z4 l2 ~* b1 f) j - }
复制代码 & v/ ` K5 O9 d5 p% D. W 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。' p* k! O( O2 E, M8 V: P
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5 }1 a; h3 |5 `6 ^4 J- ?. 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)
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