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8 X) p; k! a" [! F4 P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。
5 y2 i; Y& r* I& s0 Y) ?4 [7 @- importPackage (java.lang);4 S: p4 X7 |, E) j0 Y" y
- importPackage (java.awt);$ `( u/ t: D1 Q
- ; [2 D9 N! {, o4 [
- include(Resources.id("mtrsteamloco:library/code/face.js"));0 `& { [8 }$ j2 n5 j
- + s' i. |* g5 q$ x Q8 j
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. I7 L8 F- n) [; z/ K' M; ^' Y
- 3 j5 H; b) l; T. _4 T1 H) {; s2 _
- function getW(str, font) {: n0 K" ~$ q6 Q! c3 H
- let frc = Resources.getFontRenderContext();* K3 j: e$ ? ^* E. D/ l2 @
- bounds = font.getStringBounds(str, frc);
: i' [7 w4 J! F4 R2 S: w2 I - return Math.ceil(bounds.getWidth());1 ^8 d4 W7 p: c- ^' Y: N
- }
% q+ R+ b6 w/ e+ v( Q. n
9 C" @4 O7 h5 j; H5 _6 ?' M9 I( ~4 ?- da = (g) => {//底图绘制
# F! _: _, x8 L, ~ - g.setColor(Color.BLACK);
+ V; Y* D: Z& K! _ - g.fillRect(0, 0, 400, 400);& P& J! d7 g' D6 w* D2 ~
- }
! }2 I* H# U, m0 F - 4 y; S) H2 G1 H2 P8 Q5 |
- db = (g) => {//上层绘制" e, z, ?$ s7 d
- g.setColor(Color.WHITE);" c! l- K" r# r* M O( x
- g.fillRect(0, 0, 400, 400);5 W% M( }' y- p1 e& a1 J
- g.setColor(Color.RED);* M. X, d& b" w. w
- g.setFont(font0);
4 h+ B; j& h3 N& |0 [( U# X - let str = "晴纱是男娘";; y' U3 B) m7 k0 j Y6 y; v1 l
- let ww = 400;
$ ]: S$ _. m- \4 R2 d% Z - let w = getW(str, font0);3 v+ d4 H$ {' D5 i1 ^! |; u
- g.drawString(str, ww / 2 - w / 2, 200);' U H4 \' [, r' Q: H0 S4 k- D
- }
+ W) g& A9 V; E3 g9 G' I - 2 v3 R- x. f5 M0 x1 v9 y1 _
- const mat = new Matrices();# \, A- ~( V# v* I) K6 [
- mat.translate(0, 0.5, 0);
' J" I5 {5 z# P2 `5 m
1 }% I$ o9 r* V r1 p) [% T) Q- function create(ctx, state, entity) {
" I8 L4 U, n0 M3 d% U - let info = {
1 S& c- n( q7 w" s7 ?) B - ctx: ctx,
7 `/ U0 E) Z. d R - isTrain: false,( R" f( |" K$ g" H: L
- matrices: [mat],; F0 T0 n; i# ^* B3 G7 j# W. U
- texture: [400, 400],
/ j# W/ v& V5 r0 J4 t' g - model: {! f `: g- X" E) e+ E9 y5 o
- renderType: "light",% o; X U, Y: B
- size: [1, 1],
3 y/ y; v( a! F; T# h - uvSize: [1, 1]% Q& D8 f, ^' t
- }
( C. S1 ]( O6 {. { - }
- p) S# D$ Q3 I4 K9 h - let f = new Face(info);
' f, L9 I# e# \2 ~* C2 N8 s, d - state.f = f;
! o6 S; R8 p4 C) } - : z( r$ g1 I) [, S
- let t = f.texture;
: u! `2 b5 K8 a# Z% `7 _: g - let g = t.graphics;3 n1 n) ]/ i. L
- state.running = true;
( j M( A ]; A2 k1 y9 j2 A1 ] R - let fps = 24;' x% m$ m, l# b/ b' }: z9 c
- da(g);//绘制底图
8 E- h/ I% l! h; c - t.upload();' R+ e3 \. Q2 ?7 z7 ]
- let k = 0;- x- m, `7 v& z8 d u" j
- let ti = Date.now();
) \. J- i/ S* Z6 \, }# ]% h. W5 h - let rt = 0;
. V C8 j" Y1 ~9 X/ f+ \& p$ Y - smooth = (k, v) => {// 平滑变化6 S' J7 r, p" [
- if (v > k) return k;
- D8 x: Z( L5 Y, V% H - if (k < 0) return 0;4 I8 d( o$ f; m& e9 w* q0 x
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 O0 V5 R+ A# q2 ?
- }3 ~9 L: L R' X/ ^3 E; Z. D
- run = () => {// 新线程
7 V* K$ x; G; C( K J( K7 V) | M - let id = Thread.currentThread().getId();, n; h& ^$ }2 S) s+ J2 _
- print("Thread start:" + id);3 f9 D, n) c+ ]+ R+ v, _1 ]0 I
- while (state.running) {
) R- D; ]; D' j8 |5 ~ - try {; n& a+ l5 y( ` b2 K2 Y
- k += (Date.now() - ti) / 1000 * 0.2;
; M, H2 I& ^! G- K5 { - ti = Date.now();
' M) q6 N' \5 h$ |- g: c1 D( X, j - if (k > 1.5) {4 S( @: f+ L) Z" z! p# l& C+ d
- k = 0;+ @ E1 q. ]9 ?5 A
- }
! D6 t: t* s; h - setComp(g, 1);
( d4 T; y- q# v5 A - da(g);, K" n0 l/ B, j# i5 l
- let kk = smooth(1, k);//平滑切换透明度& P2 d8 e" a4 I1 X# ^
- setComp(g, kk);
9 X9 B5 ]+ B+ p1 Z* }' r3 ~ - db(g);$ t7 ?* i1 n1 u
- t.upload();' I# X+ ]; X n' w; [
- ctx.setDebugInfo("rt" ,Date.now() - ti);; h3 V# a$ l! X' D* {. n$ l" J( D
- ctx.setDebugInfo("k", k);
* A Z9 y# g6 ]' e - ctx.setDebugInfo("sm", kk);" {! J6 T; |. J5 P
- rt = Date.now() - ti;
" y8 p0 A/ F3 y$ h3 S5 h& t: W - Thread.sleep(ck(rt - 1000 / fps));' [. s. I5 n4 c$ p7 D2 j% j. s# D3 s
- ctx.setDebugInfo("error", 0)4 ?2 @, F' }' l/ [& f
- } catch (e) {, B- U: v; q! J, ?. n# J$ k5 L8 [
- ctx.setDebugInfo("error", e);
1 w- }' O5 k* f1 c8 ` - }! L H3 g2 O2 I" v* E
- }6 ^4 z p- q" v. u) p
- print("Thread end:" + id);' d# R' m& I" _0 V3 o
- }' j2 y- w. `# A' p/ R
- let th = new Thread(run, "qiehuan");+ S3 b$ }2 p( k- x
- th.start();
9 ]5 p. E: x1 R M, Z! y1 E3 C - }
! R7 K. y: ~4 J) [4 ?8 }. ] - : R( j+ l% c/ }% j8 i" i
- function render(ctx, state, entity) {
3 j; Z k8 p- r' F$ x - state.f.tick();
, k# g A& t4 {; a" H$ T9 O - }: T e& A' o. N3 }7 _9 D
- + i$ _$ Q4 ^3 o/ Y) F: s' G4 a$ _& M
- function dispose(ctx, state, entity) {
, a* O0 L; O) L5 l; p; x# d - print("Dispose");
$ x, C* }7 ~/ D3 { - state.running = false;
! D; p) l/ ^& d- Z8 g - state.f.close();$ @/ G( Y+ l$ S; {9 M) u
- }
- Z* f7 |0 t. A0 H( |3 z
% f) |* [ ?; y: P/ o" d- function setComp(g, value) {' g z5 Q: k, Y5 ~7 D
- g.setComposite(AlphaComposite.SrcOver.derive(value));( g% a8 m! D% i
- }
复制代码
* P% V) `3 s" p, B2 \4 G2 x& h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。7 i# [! v3 u9 S/ G
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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)$ \) x+ t# W; z* S' \/ n/ E: E) c( a/ I
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