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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。
1 x: O0 p: @3 t! x# y1 ~0 _- importPackage (java.lang); Z8 s8 p0 n/ T8 }$ M ^
- importPackage (java.awt);; |# v4 `0 L$ ]9 D
) \3 }5 W& ?) r9 O- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) { ?. _, V% X! g: I5 V
- let frc = Resources.getFontRenderContext();, J1 t( a4 @7 h& A( I
- bounds = font.getStringBounds(str, frc);
3 d& C' @* X( @! w$ E - return Math.ceil(bounds.getWidth());9 t5 F. {4 g) M6 s, z/ [
- }
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- da = (g) => {//底图绘制
N8 p9 Y( f# A5 } J* |$ j - g.setColor(Color.BLACK);
+ k) A4 J* z! k - g.fillRect(0, 0, 400, 400);
. e+ K; t/ o0 _, m - }
4 z+ S7 Q& C# E! v8 Y$ y$ v( n1 m - % ?* ~. p' a( ]$ y
- db = (g) => {//上层绘制; C4 y" l4 v8 n# L4 x2 q
- g.setColor(Color.WHITE);
6 Y8 @9 R, K/ y - g.fillRect(0, 0, 400, 400);9 @& F3 ?8 l, a6 N
- g.setColor(Color.RED); h: k! f$ y- W7 S% C' r( V6 X
- g.setFont(font0);' x( f4 i& S! G
- let str = "晴纱是男娘";$ S/ G2 I( S7 c: M; _
- let ww = 400;, p, _* M# h0 b7 C% m( |1 p
- let w = getW(str, font0);3 u$ C- u4 b; J8 F5 X' i
- g.drawString(str, ww / 2 - w / 2, 200);5 [5 w2 }6 K% W) x* h
- }! ^2 ^# i: Y. v7 l7 X
- ) k$ i* m2 x4 {+ N& c
- const mat = new Matrices();
" Q+ _8 O; l; n' _% W5 v - mat.translate(0, 0.5, 0);
- K6 t7 z* Q/ c" y
! D1 |( T8 P) o! [1 m- function create(ctx, state, entity) {9 j. X- [) l- d' D
- let info = {
" E1 y9 A% ^* ]- f8 O+ Q4 }% C - ctx: ctx,
% E; G. U S3 ^+ j" R4 e - isTrain: false,3 v" {/ ?2 D4 T$ w
- matrices: [mat],7 V' l- R$ j1 ]; c- L* H, U2 p9 q- a
- texture: [400, 400],3 ~ t. z) `! [& _& J$ y5 W
- model: {& Y' M& R; J6 g$ U) A V6 x) `
- renderType: "light",
, K1 ]+ z( w9 T" ^8 v$ H - size: [1, 1],: B H+ t1 E* V1 C
- uvSize: [1, 1]( T; {! c7 l/ O
- }2 l" B c1 L' R9 P8 i* u# b3 k
- }
. R! \" s" P: `: k: C - let f = new Face(info);; _5 ~3 [; O/ k
- state.f = f;& p, @2 P- O; i
7 N' O9 p9 ~+ a6 E! `8 @5 E- let t = f.texture;: ]6 Z% z5 ]* W% u2 h% y: M" M4 t
- let g = t.graphics;0 v! A3 x G( z, Y8 I
- state.running = true;/ P, ?4 r& \' T+ L& R$ v6 U% x7 Y
- let fps = 24;& ]# `& i" _* t( |' P& o
- da(g);//绘制底图
; |. U! I4 p4 a1 e# l* v7 J0 @5 S - t.upload();; t( M5 t' p- u5 G" j4 }
- let k = 0;
1 D# [4 O- Y. ^% I; v - let ti = Date.now();
6 y6 d) b' W6 k5 }% B - let rt = 0;
/ J4 G U, _& B2 H# y - smooth = (k, v) => {// 平滑变化6 j: j" g p- _& U' h# _% ]
- if (v > k) return k;' u3 |- r3 O2 h& a& n) j; O" J* j
- if (k < 0) return 0;. c+ }9 d" |1 ?+ Q/ ?
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 }& d( J8 f+ O. h, S# Z% c! } - }
7 a/ u, h$ A! X- P* v; }( O - run = () => {// 新线程
, h# z2 ?6 u( a! t4 |' j - let id = Thread.currentThread().getId();
( U* X- n3 U2 ?5 J6 d6 `4 B - print("Thread start:" + id);7 W( z7 |8 @) B6 j# {" G
- while (state.running) {" A' ]7 x$ {3 R; h5 @
- try {& ^; W# y R& a/ F
- k += (Date.now() - ti) / 1000 * 0.2;- i! O6 b0 P) U( F
- ti = Date.now();
& c, J1 P. [) F' l2 [- e& U3 b - if (k > 1.5) {
3 o) Q# D0 E: n5 i - k = 0;0 H/ q: }3 ?; S
- }
3 O' P: S! V' ?/ o+ u7 S% v, Q - setComp(g, 1);
/ n. o2 Q! ~" h8 ?2 q$ g) T - da(g);) J9 S2 L+ T/ \' x' T' o0 K
- let kk = smooth(1, k);//平滑切换透明度
: _$ j$ ]) r+ O) T$ ] - setComp(g, kk);" Q. e7 f0 x2 c' W$ H5 d4 K" v. Q4 U
- db(g);
8 {! r' u) H2 u* f. u - t.upload();9 h& r1 C/ R6 {( b# ~
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 [$ {0 y; x& W8 T4 m" N, l, j- c - ctx.setDebugInfo("k", k);
: T6 N; d* N8 \+ ^ - ctx.setDebugInfo("sm", kk); A1 i1 w0 B' q( R1 S7 s4 w
- rt = Date.now() - ti;# y( l% R* c* o. s+ |0 G: O
- Thread.sleep(ck(rt - 1000 / fps));
$ h, k9 B. \( r# }8 M5 c - ctx.setDebugInfo("error", 0)+ u% { E+ I& m% |
- } catch (e) {
, T$ a( Q( {+ _0 Z - ctx.setDebugInfo("error", e);) W5 @- D) Q6 H% O/ a
- }/ Z9 r3 r; p) w ^. c
- }* e" j4 W% D( M1 X4 L
- print("Thread end:" + id);
; P# W( c8 Z, C0 G% A6 J - }
& ]' C U& X. u - let th = new Thread(run, "qiehuan");
8 n5 ^: }7 r2 s9 c ? - th.start();
5 [( E7 a) _2 I6 r) R8 p7 s! Y - }
- i/ h/ d. w* q
+ |% D- k* p, P+ z0 r+ ^4 Z2 D- function render(ctx, state, entity) {
9 p8 C w. ~' v3 A- q - state.f.tick();; Y1 O* }! e7 X4 L* P: g+ h5 |
- }* u2 u+ k, n! I% \
4 P% J* b6 x6 U+ H- function dispose(ctx, state, entity) {6 }9 |5 q0 ]/ |8 Y6 k+ G; N
- print("Dispose");
$ i( c# ^. u X - state.running = false;4 |3 l4 [, |. V8 x( @/ w
- state.f.close();
" a! i( i+ f8 w! ?7 }+ Q - }
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h. {5 R, m( i9 U' ?- function setComp(g, value) {
, _: D' ?3 l% g - g.setComposite(AlphaComposite.SrcOver.derive(value));* L8 O! I. N6 I9 J& `4 I
- }
复制代码
p# a% j* |# K" b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。6 U2 H% Q. c7 n/ Q. e
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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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