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/ H8 w4 }3 V! F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。
* |6 |# K( T' h. p4 R- importPackage (java.lang);
2 d: f' |! s" [1 d3 } - 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);+ l# ]) b$ q- H R
- : G. G. @" R1 |2 a" D
- function getW(str, font) {
6 ]2 r+ H+ d2 p/ i) c - let frc = Resources.getFontRenderContext();8 b3 r' M' h% y
- bounds = font.getStringBounds(str, frc);
% L2 p1 e- n% v5 b6 x1 F' L - return Math.ceil(bounds.getWidth());
8 J; u+ J; j/ y0 @, P$ N' e - }
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- da = (g) => {//底图绘制9 C }+ a" j6 m4 _. h
- g.setColor(Color.BLACK);
2 K$ E. F# \) s( w$ S' u7 i4 F - g.fillRect(0, 0, 400, 400);+ e1 ?! S. Y( \/ Y
- }9 |7 o& i3 E: [% v! p$ P+ w4 O1 V
- 2 j; y t# l: F) o8 u
- db = (g) => {//上层绘制
; Y7 x. |2 A0 _# f% Y) C - g.setColor(Color.WHITE);
; L7 H) |$ m; O - g.fillRect(0, 0, 400, 400);
6 ^' ` X; m9 s& Y0 } - g.setColor(Color.RED);& G2 b, ]7 W" f; ]9 @0 N' _# T
- g.setFont(font0);( B8 s5 D; @! D- n
- let str = "晴纱是男娘";
m4 x* U0 z) _7 l- X8 G9 ]' U4 b6 q - let ww = 400;5 C1 k" P% P/ C, I8 ]- [2 g @" V
- let w = getW(str, font0);
o# K1 Z- O2 ?0 y t$ u9 g4 x - g.drawString(str, ww / 2 - w / 2, 200);/ y/ q0 Y' O' f, t
- }
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. l, k0 D# T* v- const mat = new Matrices();
) k: ?+ \. N" u - mat.translate(0, 0.5, 0);
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& b) u& w7 f( S! j- function create(ctx, state, entity) {
" T6 L8 [, {- F. E+ D& T8 S - let info = {) W: V$ \, r! X& D
- ctx: ctx,$ R! F( i5 j$ Q/ t# c" P! u f: g3 h
- isTrain: false,: d' P9 y5 h4 O7 T8 \
- matrices: [mat],
. Y* K; O9 q- l6 D - texture: [400, 400],
) G2 E! G2 T) I5 U- e4 u - model: {
% i3 A L9 s- } - renderType: "light",
9 D9 f' G0 T- x4 @$ w1 Z8 v1 _ - size: [1, 1],
- s: s& E! N/ P, o2 c* b& Z( p - uvSize: [1, 1]& A/ r/ g1 P$ z) _* u) A# S
- }) D; g, p1 \: W
- }4 W! g& g, ^' g2 q& C
- let f = new Face(info);$ g$ R* _/ a2 C$ d" s
- state.f = f;
$ v' C! Y+ d( S5 [* T
4 n3 f) e& q6 i- let t = f.texture;
- k& w- U9 B9 I, N) y5 B - let g = t.graphics; T7 Y" o* H6 _9 T. a
- state.running = true;8 ~/ G, g/ w, F3 `
- let fps = 24;& @: L8 }2 r; t: {- V2 \1 B( }) @
- da(g);//绘制底图
7 h* c) H* j. }2 | - t.upload();
* m+ j3 n/ g. J9 R' _) `$ [ - let k = 0;4 d, p- p4 M9 C- p5 {
- let ti = Date.now();
4 \ n+ a9 k p9 }: y! R - let rt = 0;
6 Q: F8 W; ?( s$ |) U - smooth = (k, v) => {// 平滑变化, ]2 W* f8 P( f0 C$ T6 i& Z. r. ^
- if (v > k) return k;; W0 F3 U: [, V6 b6 }1 D4 J# U7 v
- if (k < 0) return 0;3 U/ }) W* A5 m) g9 C+ p
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程' S% x. ?/ k& g% v; _2 Z9 W
- let id = Thread.currentThread().getId(); y0 K6 \) O/ a0 f7 G
- print("Thread start:" + id);
( e/ t! @3 S1 c$ z+ N+ J# O. ]6 S - while (state.running) {9 A/ P9 y2 w. @: H
- try {2 n# O' ]& o' I' ^
- k += (Date.now() - ti) / 1000 * 0.2;( H% {- r: _& c( ]- h' ~
- ti = Date.now();& s* [3 _ ~8 @$ m
- if (k > 1.5) {. u0 t' o0 @ i3 X
- k = 0;
! V$ G/ c0 n N - }
0 W. G$ }9 b" X" R/ ? - setComp(g, 1);
0 d+ \, Y3 z) L$ o {5 S - da(g);. _8 u6 _. P1 {& _; ~& f# n$ ?
- let kk = smooth(1, k);//平滑切换透明度8 J& ^) a! W" v, j! Z+ i4 l4 x
- setComp(g, kk);
G D7 X+ T7 ?3 b; D - db(g);# s! \* B7 |7 c: B6 W! ^
- t.upload();( v# O: j @- d! V8 k
- ctx.setDebugInfo("rt" ,Date.now() - ti);3 K6 _$ }6 S1 O' m
- ctx.setDebugInfo("k", k);6 a7 Z. I1 c4 K- P5 s& d1 M
- ctx.setDebugInfo("sm", kk);
5 l, B* M7 g1 c l. _. v - rt = Date.now() - ti;
) \& A, f7 D/ r& g - Thread.sleep(ck(rt - 1000 / fps));
- J3 z5 W4 a. i- y- W" E - ctx.setDebugInfo("error", 0)
9 ~8 G5 D* I& Q" t - } catch (e) {+ z5 h7 }. u4 I, f( f) w
- ctx.setDebugInfo("error", e);. b0 H! P8 K% R, y6 Y
- }
; d/ {; s7 d5 y5 Z- [ - }+ q+ O) q1 F0 k
- print("Thread end:" + id);2 B4 E' G5 D/ A! [
- }
2 q! F- {+ }' |! _6 G - let th = new Thread(run, "qiehuan");
6 B- x- g" @/ D. s - th.start();" ^) T, ]) V6 X) B1 F, U
- }
- v. F( n7 `3 A) [5 n5 J2 |* ?9 R - * u4 e/ E6 Z3 B( W' P
- function render(ctx, state, entity) {% ?! A) R, W8 n9 b2 g
- state.f.tick();6 f+ |: y, Q* S
- }
# }$ h5 l- Y+ N, C! n - R$ [- T( a" n6 N7 W/ C! }
- function dispose(ctx, state, entity) {& {( f# w9 j/ Z/ P4 n9 @
- print("Dispose");* M% G# v" U8 ]) Q* Q
- state.running = false;
6 N8 j4 i4 j P$ o3 Y" u5 o - state.f.close();
8 I9 e$ l4 _- f3 z2 {" a8 B - }
% D: v9 p+ }9 y+ |- R5 P9 z
, ?" e1 \* q2 F I1 E/ J0 l, v- function setComp(g, value) {
# l( e' e; e& Q" }! y& Q2 q - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 p' g0 F7 `% y9 H1 g t+ p - }
复制代码
) k; R; }5 f8 x. u/ f5 n$ [1 p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。
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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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