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! }- E7 i: [; L3 X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。
- d. i" S- K9 X: D5 M9 |: I- importPackage (java.lang);
+ m" X6 c9 t+ f1 B8 g: u - importPackage (java.awt);
: M' S# D: k6 H, `# r* ~6 h
C3 I a( ^/ E( T; M' ^9 H- include(Resources.id("mtrsteamloco:library/code/face.js"));1 e! A+ B+ }7 V* M, w+ l
- * X3 p. M! `+ d. X, ?% |) c' i- D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
9 [) H5 l& r% O. Y z* \. n) o - let frc = Resources.getFontRenderContext();/ t+ h4 i4 [# G0 m
- bounds = font.getStringBounds(str, frc);
* V) {0 X3 s1 ] - return Math.ceil(bounds.getWidth());! A4 I7 _4 ^3 ^3 @& X: B2 f
- }
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( j. E) p8 f' L# E; @ }7 w, ^- da = (g) => {//底图绘制$ ^# P. w0 k( M6 w" d1 U
- g.setColor(Color.BLACK);
x/ s1 }5 k* ]. F7 K# N8 v - g.fillRect(0, 0, 400, 400);
) S3 Q$ b# j1 k7 s9 O2 f - }
6 y9 `" h; D8 ~0 t - & d6 o' h+ S$ d8 {3 S
- db = (g) => {//上层绘制
, ^0 ^2 j! O: C1 I- W - g.setColor(Color.WHITE);4 [- I/ Z& G# ]( z. m1 T
- g.fillRect(0, 0, 400, 400);# {! Q2 `; d8 j3 d% }; _
- g.setColor(Color.RED);& ^9 q3 n% P' @& C
- g.setFont(font0);
. J( R7 v1 R5 o& O8 |# ~ - let str = "晴纱是男娘";
! U+ E5 Y! ]- T/ `4 K2 Y, ^ c( I7 \ - let ww = 400;
; H7 I, b% Z/ t9 Z$ Y* y' j+ s - let w = getW(str, font0);1 e" ]- I2 t. q
- g.drawString(str, ww / 2 - w / 2, 200);5 L$ o( J; p/ U
- }
# }; |0 j4 h& l2 w - ; l% g7 v7 G: x5 l7 }
- const mat = new Matrices();: p% R+ _# P) Z! g- e" H
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {9 b+ ^6 E# t+ \2 S, z; w
- let info = {. E# ]" n7 R P' @ N. [3 d# d
- ctx: ctx,7 |1 p$ L: C" P. [9 E l/ J
- isTrain: false,
+ I( ?, f7 M4 ]+ Q9 m - matrices: [mat],8 V9 r# Z: M- |/ q- Q# G6 ]. L9 B
- texture: [400, 400],
6 \$ x, m3 G, @' F e n$ [: d. K - model: {
5 T8 _( M( R5 v - renderType: "light",4 |' d' ^$ r* v9 i
- size: [1, 1],
5 S/ M6 T: h w9 W4 J) I+ c - uvSize: [1, 1]' e) s% {1 \/ o3 Q: C+ m9 o( ?
- }
& w& j5 t' f& Y) H1 s - }
6 A& j5 m2 W2 P T) B# L) ^ - let f = new Face(info);
* s9 i- @! g! n2 T) b - state.f = f;
* Y! g- }. s& H5 q) Y# c, E0 n
2 P. b0 z9 ?- t- b+ o- let t = f.texture;
5 o) }0 x( q9 p - let g = t.graphics;
6 H. C q' U) B/ w - state.running = true;$ b) q% @; N7 z; Y1 p9 c
- let fps = 24;
6 Q# j! B; Z$ d& F6 P - da(g);//绘制底图) V6 N8 X' A/ l9 N1 M; j1 M4 j9 z
- t.upload();
) }! ~: H: r ^* \, Q2 i, R9 ^: X - let k = 0;) `: [4 D; Z5 ^9 A' N: _$ {
- let ti = Date.now();/ {2 ?# U- s$ N9 A' t1 v
- let rt = 0;
- g: `% j( p0 z | - smooth = (k, v) => {// 平滑变化6 m8 r$ ?! n: r1 H4 }3 ?8 F! _# U
- if (v > k) return k;( I& n: B+ \7 R7 q4 Z! c( j2 T
- if (k < 0) return 0;' V9 Z3 z( @5 | I% v" ~% K
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" ]: j4 u# o/ M0 K4 p
- }, Q G0 R' j! f- Z8 U" J
- run = () => {// 新线程
2 S3 l$ `$ t2 P+ p0 k# ` - let id = Thread.currentThread().getId();
: {" I B% G9 j/ X, s - print("Thread start:" + id);% D8 A. p8 ?2 ?7 |9 I3 e3 O% E2 B
- while (state.running) {: A* V; v; e! d- P
- try {% j/ a+ K5 l0 x
- k += (Date.now() - ti) / 1000 * 0.2;
. K7 [. [4 K& g( c$ U; u) L - ti = Date.now();
% G( Y+ M3 T5 n$ c* e+ { - if (k > 1.5) {9 L6 k+ D* ~/ [8 A4 |
- k = 0;) Z0 z6 x/ h# Z: T
- }
- H# p/ q( y$ {6 e1 N. f. ~ - setComp(g, 1);1 Z1 ]% v& P+ C' v W
- da(g);9 t5 m) y1 f* H) z
- let kk = smooth(1, k);//平滑切换透明度
7 {: U9 W; n2 ]8 t5 ~4 o - setComp(g, kk);( j- S- a6 R- l1 [8 K5 q6 I1 |
- db(g);
/ ]; d, Q/ H# ^% e, [+ }9 F7 l - t.upload();
# {. ~* x0 c5 j3 S9 t - ctx.setDebugInfo("rt" ,Date.now() - ti);, K+ H2 T6 Y- D8 O; Q
- ctx.setDebugInfo("k", k);" I/ }* j& A4 U
- ctx.setDebugInfo("sm", kk);+ v. e" m" U& W9 p3 j8 B
- rt = Date.now() - ti;
; T; l0 }7 m$ A N - Thread.sleep(ck(rt - 1000 / fps));) M4 z# T. R! z6 {% B. \/ M6 t7 S
- ctx.setDebugInfo("error", 0)
2 {7 z0 K' \2 w0 ] j( x - } catch (e) {' X' B" o7 L8 q2 J& E1 b3 v- I
- ctx.setDebugInfo("error", e);
0 H5 v2 _! f. w* k1 T3 D - }
; S7 n. }3 a0 I- | - }
4 v6 w% J( l6 `$ x* ]2 h* c8 X, ~ - print("Thread end:" + id);
( P$ n+ ~. r7 K G4 X$ l/ U - }+ a. f5 Q& e" ?- t. C
- let th = new Thread(run, "qiehuan");- }' l5 R( D0 C0 U' x8 K
- th.start();: A( C3 D L( J" K- u$ W f
- }0 Q" _' ^( A j2 T$ a4 }! k: r3 `
6 y* Q7 F* `6 }- function render(ctx, state, entity) {
0 Q. v* F! m: W2 B - state.f.tick();; F+ w: Q! n+ `3 a9 \# M0 A0 S0 D
- }% G1 @6 n+ \8 l1 j& R
- 8 A' F0 b3 ~- M+ z2 {
- function dispose(ctx, state, entity) {
1 [( Z' O6 C6 Y7 ]6 m) b [$ K - print("Dispose");3 N; }1 Y, m/ [8 b8 Y5 [
- state.running = false;
( N" P& W8 m; K* j' l* E6 V - state.f.close();. X, w7 _# z/ y
- }# }4 N! z A$ u) t4 S" A
, {& A i3 C2 W0 R; I" k: I- function setComp(g, value) {
1 K8 c. P9 F4 a - g.setComposite(AlphaComposite.SrcOver.derive(value));
" Z2 k; M9 J1 @0 o2 S. k* Z1 I - }
复制代码 9 L+ H" N" \* E: \( i5 V2 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。
3 y& R$ q3 K& g, `0 n( j; E; U9 K3 s* S8 @1 L
4 B+ u1 Z, E) I/ S/ t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) I$ Y }7 O( E$ S% [- H
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