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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。
, k* P% h. K7 g4 h- importPackage (java.lang);
) c( w2 B8 Q! Z% n! A' T/ Y& q - importPackage (java.awt);: L9 s5 A. W* E p0 F. g- [+ K
- " r& f7 R* Q l% K$ l
- include(Resources.id("mtrsteamloco:library/code/face.js"));8 t: p1 H& d0 [ M7 S1 v
- ! r9 N- x, q5 p2 ]
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
/ w! }9 l" w/ T- }/ z
' S4 r3 c4 |8 s6 W- function getW(str, font) {! R4 r# p2 C! }9 |1 n: J
- let frc = Resources.getFontRenderContext();" c T* n0 w" e# o: a0 c$ L
- bounds = font.getStringBounds(str, frc);
6 N7 Z1 I6 w; D- X% d* U, B# Q& ] - return Math.ceil(bounds.getWidth());+ I9 D$ u0 H4 A2 U
- }# N# J7 B) X+ \, d$ W
- & ~! p2 S: M" E
- da = (g) => {//底图绘制
+ ` b( Q; B8 }6 K3 D - g.setColor(Color.BLACK);
0 V, g( A- e/ H6 I* H1 f - g.fillRect(0, 0, 400, 400);
% k; o' G! U) ^8 X. t0 Z - }' a2 l! z, m! V( ~( [
3 R8 _. F+ b! ^/ X0 l5 B5 E6 A) ?- db = (g) => {//上层绘制- n* b3 P9 n* [! @ v; f
- g.setColor(Color.WHITE);
$ ^6 P# x7 L( b - g.fillRect(0, 0, 400, 400);
% J$ g2 X9 H; m, `" m - g.setColor(Color.RED);7 e6 o! X2 Z" E4 B6 T
- g.setFont(font0);- F9 L `5 Z+ G7 Y. L$ t2 T0 j2 S
- let str = "晴纱是男娘";
. N( b2 Y8 j) S6 N - let ww = 400;6 Y8 O k- g# c" X
- let w = getW(str, font0);+ z7 r9 r. |* s5 c- G
- g.drawString(str, ww / 2 - w / 2, 200);$ ]3 G; u3 A2 q
- }
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8 v( q# o; B2 V- const mat = new Matrices();) M+ ]) E/ @* C" b' L6 F0 e/ k$ f/ z
- mat.translate(0, 0.5, 0);
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. j: D4 z. q' z- function create(ctx, state, entity) {
7 \# M9 t" w, [* I; h# N - let info = {# L( V( X% @% q, Q! x. E
- ctx: ctx,& q0 @- Q# w% d$ c9 F! Z: t
- isTrain: false,; W7 n. [9 G+ m5 |
- matrices: [mat],
) P/ ~! _3 j2 e* x6 Z - texture: [400, 400],
, u: K- I- F7 L9 p# d2 U - model: {9 Q' c9 E; ?) x
- renderType: "light",0 v% o/ j9 v8 ?: q/ N% w: F
- size: [1, 1],0 }# o4 m. | j6 R( u5 X6 r8 d
- uvSize: [1, 1]/ T$ O t5 a/ s h2 K5 b
- }' g7 D. n2 C8 K# {% G" M% H# ~
- }
* M" [/ a7 g) u: c: E+ g - let f = new Face(info);
- H2 Y) N- y( {9 n1 S - state.f = f;
2 G7 \9 Z+ R, d) s) b6 I - : f. c( ^( y3 s. n7 A. h2 ^; S( b5 S
- let t = f.texture;
7 d7 r) j8 S! P1 D8 } - let g = t.graphics;
P) `$ ~* {. s# o - state.running = true;* P3 C$ P# j | Z) E% G0 _$ u
- let fps = 24;) b3 a) v: @; I2 R! \5 F
- da(g);//绘制底图
1 O; B' \9 c6 v1 q6 r - t.upload();. A n5 B8 k1 v( z, x4 @
- let k = 0;- L% n2 Q3 u7 w* ?5 _: g1 F
- let ti = Date.now();
, q1 L+ n8 o. L! c) |2 e - let rt = 0;
# `- d g; M" V ^ - smooth = (k, v) => {// 平滑变化
6 B" {; C0 u6 b& [& S - if (v > k) return k;( ?, X$ L/ P& m
- if (k < 0) return 0;
/ w4 q. \$ g( M/ q( G4 R4 m - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ Z; I7 f+ _. V" J - }! g* Z: [& d# |: v) H3 i, [6 h
- run = () => {// 新线程
0 ^: H" k+ J" e8 L! g - let id = Thread.currentThread().getId();" c- Q e3 y# r
- print("Thread start:" + id);
) I3 d8 z% ]3 C1 B, t# s7 C l - while (state.running) {! n6 M6 Y- N# @: s
- try {
: u" _* J9 K$ Y+ H3 {& w! ] - k += (Date.now() - ti) / 1000 * 0.2;7 f+ Z" }5 }8 d- S1 b5 w( N3 F, a
- ti = Date.now();7 n @& P6 b5 _7 {
- if (k > 1.5) {: s; q; M9 a; `6 J
- k = 0;
7 K5 @* W$ ^ s" u - }7 R! R& e, l5 C
- setComp(g, 1);" U6 \) {; ]5 w2 G7 i
- da(g);
% f+ W5 t; u6 S+ M - let kk = smooth(1, k);//平滑切换透明度& R! d$ x% C/ w- \7 l6 D
- setComp(g, kk);2 O8 ~/ w1 Z! N
- db(g);0 z$ u2 ?. e( X, X+ A& k0 Z4 C
- t.upload();& ?7 a/ K, C' p1 L3 _
- ctx.setDebugInfo("rt" ,Date.now() - ti);7 \# d/ U, a& `& o
- ctx.setDebugInfo("k", k);
' u7 D: A0 `! s2 C% ]8 T& T - ctx.setDebugInfo("sm", kk);
: Y5 Y3 B9 |) O5 O0 m1 L; c2 k - rt = Date.now() - ti;
) b5 G+ T* [- T/ x ] - Thread.sleep(ck(rt - 1000 / fps));. B9 Z+ i; y# Q* j* d- |4 s
- ctx.setDebugInfo("error", 0)& D+ J' g% Z R! ~7 p& E
- } catch (e) {1 e$ T! q4 p4 L+ V
- ctx.setDebugInfo("error", e);
+ P1 i+ \, [/ K' Q: c - }" O' H# n1 J1 Z+ Q I7 n& G) R+ `
- }
& G- i, [) G9 w' I6 ~" e - print("Thread end:" + id);4 O; F# F1 K9 H0 C0 p& Z, V
- }
; I" ?+ E# ?" E' c6 k: L - let th = new Thread(run, "qiehuan");
! |" z; E: B- q* y7 ] - th.start();; r% _* U0 x! O& q# T6 U
- }: }8 `6 l" ]+ S5 q( S0 T0 u
' b6 Y' t4 d. U. d- function render(ctx, state, entity) {
. {4 `! r3 ?. b1 h7 q. S - state.f.tick();
9 N* R# X) j- g- d- d, y6 Q - }
: I/ `6 m& s9 f - 9 ]% v. B2 ^4 c2 _) ]$ k0 Q
- function dispose(ctx, state, entity) {
. G6 l! j2 _2 }; x* Q - print("Dispose");
* a+ H& Z6 o0 k) g - state.running = false;
; t* _0 }* G" G; [; I - state.f.close();
9 D1 x0 B) l* ~. b i - }
7 d! ?1 }% D3 o5 C6 a; n( u* X - ( |" E2 t6 w) _8 {
- function setComp(g, value) {
4 S8 O0 D. K R# ^% w$ I: f) o! r - g.setComposite(AlphaComposite.SrcOver.derive(value));
6 @" a# x; Q8 H! H! H4 g - }
复制代码 8 r0 v7 l- e: E; U8 x5 R$ z; k
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。$ R. i" P' W8 @, C7 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)+ d% R% C+ b# [' Q
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