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/ [6 D9 Z% G @8 n$ u7 \% V% Y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。
% H& R4 L1 R9 `, ?; ?8 W! D- importPackage (java.lang);! E% x4 {, U& v5 V; z0 J4 Q2 T( M
- importPackage (java.awt);+ @# R1 ?" s$ ?% P5 |( ^& {5 i
$ Q2 U! \6 Y/ c: s4 K. T- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& e) H& Q6 W; { S" a K [9 R$ { - + ~( }7 B( V0 d, x; ~
- function getW(str, font) {
$ x% N9 L/ v. @* Q! f+ \% y- b - let frc = Resources.getFontRenderContext();% Q# j* j8 c9 a$ v
- bounds = font.getStringBounds(str, frc);$ r% x( H3 X' Z9 {% i. x
- return Math.ceil(bounds.getWidth());
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- ( Y, T" r& p a6 [1 U3 p8 P; t- k8 r
- da = (g) => {//底图绘制- e1 _3 n) D+ J) H5 l9 Q$ H4 Q
- g.setColor(Color.BLACK);
u: Q* k2 k1 Q5 Q% h - g.fillRect(0, 0, 400, 400);
5 `% S" N& `/ h% r! {* q - }7 F: W4 {! y: B Q# l8 G) ]
- 7 [6 |+ i- @3 u! D2 V9 s
- db = (g) => {//上层绘制6 w+ R0 t8 T' o. m2 ]
- g.setColor(Color.WHITE);
+ s* H7 _( s+ y5 v - g.fillRect(0, 0, 400, 400);5 I$ ]% Q7 |: a- L
- g.setColor(Color.RED);& k/ K, q7 u" j( t7 `( y
- g.setFont(font0);3 k8 J1 K q# j5 I9 c5 K7 W8 M
- let str = "晴纱是男娘";
* c" X+ U* y9 t4 x; _0 p& Y/ M - let ww = 400;* S% P ~5 D8 X( L {4 W
- let w = getW(str, font0);
8 p& U1 W7 C& ^2 H% d - g.drawString(str, ww / 2 - w / 2, 200);
* ^. b. c: g, d - }
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- const mat = new Matrices();! T1 u0 Z/ s, k- V
- mat.translate(0, 0.5, 0);" q" v. w! @2 t/ z
# D6 C; x4 B# a9 \/ ]& w$ a% l+ }" i" o- function create(ctx, state, entity) {
6 f- Y' `% D% k2 J - let info = {1 \$ F' } t/ @
- ctx: ctx,0 o7 L# A) H H) k
- isTrain: false,
* X' ?7 V8 O3 {6 v* X% X Y - matrices: [mat],
* H4 i9 F3 L# g8 T - texture: [400, 400],: ^5 P' |7 V( r& ]/ z& G' X
- model: {3 p! J6 { {$ d: z5 R: V' B& F
- renderType: "light",& T2 R4 H/ i" {! x. b0 [
- size: [1, 1],
5 y' ~/ d4 l5 ~" ^ - uvSize: [1, 1]
- r# O( ^3 Z+ o3 B! }0 u - }6 r: Y* r2 l( e
- }
. Q# {6 s/ ?. r q+ p' ?; \# u o, Y - let f = new Face(info);$ Q. p Q( B9 V4 S
- state.f = f;; i( r0 M. ^. p, [
& h9 {! r4 ]4 ~" Z/ p* X. T- let t = f.texture;, H- D$ P: x4 D
- let g = t.graphics;
. p$ S. M' E+ k8 g$ Z* }0 ] - state.running = true;+ B0 W$ s$ K. e4 r
- let fps = 24;8 O' B) D8 Q# \5 a* x% Z" z5 ~, G l
- da(g);//绘制底图* n1 ?# L) I" U4 n1 s4 f
- t.upload();
$ k( J1 ` h+ v& O2 [& |/ t - let k = 0;
; ^3 Y2 l4 I$ Q. Z4 L - let ti = Date.now();. {; l4 a2 i4 }1 w! Q
- let rt = 0;# ?% d8 R7 h, F& |
- smooth = (k, v) => {// 平滑变化
$ ^7 ]9 U! T1 h( |3 Y - if (v > k) return k;
1 I- g" U; d8 T; o0 N) g2 P, T. J - if (k < 0) return 0;5 \+ K- K* P6 W8 L! l/ w$ n* w
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 f" m, T+ t/ f7 q# o6 V! U6 P
- }) |2 Y+ d4 S6 \
- run = () => {// 新线程: ^ `, B+ v$ g
- let id = Thread.currentThread().getId();3 `3 _1 [ a$ Q0 \
- print("Thread start:" + id);
; V' V4 G# m9 s+ s) L2 t- y - while (state.running) {( W* } {5 A+ A0 G! ]! B
- try {. u$ b/ |# j8 c0 W
- k += (Date.now() - ti) / 1000 * 0.2;: F0 ]% C7 n3 m# b
- ti = Date.now();9 Q1 @# [% L$ y" @( L) `
- if (k > 1.5) {5 n$ x7 j" W; J( ^
- k = 0;- j; }& S& c! W, t+ W
- }# T7 z; t; q' J7 ^$ r
- setComp(g, 1);) b; q$ z' q5 X7 b. b" Y
- da(g);
: ~; A- |# d! F" c5 A) \4 A - let kk = smooth(1, k);//平滑切换透明度
, a8 m; l/ g) @- w: k+ g - setComp(g, kk);
z! | `$ o; M3 d/ u5 h - db(g);/ N4 s+ @2 u: g3 [0 i) B' x, t$ S
- t.upload();7 o' i9 }+ j, b; l' u4 y( ~
- ctx.setDebugInfo("rt" ,Date.now() - ti);" O3 Q# h1 e4 @: d$ Q: w7 _1 T' `% C
- ctx.setDebugInfo("k", k);
3 f0 v& h* Y# O9 F+ g - ctx.setDebugInfo("sm", kk);
% I2 h2 Y1 q& g) j3 t$ v - rt = Date.now() - ti;' n. ?. z: x+ n7 L& J3 ]
- Thread.sleep(ck(rt - 1000 / fps));
6 ?6 G3 p8 O: D - ctx.setDebugInfo("error", 0)0 G' O* n. t! z; @/ `
- } catch (e) {& X) s6 f3 O: j( x
- ctx.setDebugInfo("error", e);4 R& T$ f+ d+ g* z! t4 Y) v7 P- y
- }
+ s" |9 { C! \" |! z" w6 D - }
; Q: {" x8 O# e2 ? - print("Thread end:" + id);
( I) [1 f% x5 u* z - }
' ^' u4 @5 W9 J - let th = new Thread(run, "qiehuan");
, A2 v' D; A5 W8 ~0 k3 M6 Q - th.start();( c5 _+ j6 S2 W: p0 G
- }
5 S% ~7 C" f1 N7 z( U, j2 p, K - - {1 M9 Z2 {" j4 y
- function render(ctx, state, entity) {1 D! W/ _* f( L5 N
- state.f.tick();2 i# B7 ?" ?# ]7 ]3 n4 N5 P
- }
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7 }" h6 ?8 Y1 t! z- D- function dispose(ctx, state, entity) {
2 v: i/ d9 e" k - print("Dispose");( V, y# h/ Y4 ]0 L+ z8 b
- state.running = false;9 @! w) ^& e; K1 p* F. n8 d
- state.f.close();
$ C$ ~3 R- X, |8 Y" V0 P! ` - }5 X: H8 N; g, Q3 f4 b- m" R
- & Z2 M7 t# r# a% B' Q& p8 d5 @$ \
- function setComp(g, value) {8 t' ~4 V. n9 S* F# Z/ Y T1 l0 i
- g.setComposite(AlphaComposite.SrcOver.derive(value));
0 z/ z$ W* [# V( } - }
复制代码
* O9 V( B8 |3 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。: o- D! e4 S3 r3 E& I
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5 R+ A2 c# J3 W( U; p# n6 q* m' I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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