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7 A2 K. g7 Y- @4 |% I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。
( u' K0 I% W, O. }# o/ y8 _% @- importPackage (java.lang);5 @$ A# j# N4 K7 N0 e0 X/ E
- importPackage (java.awt);: B) F3 |* a$ S& x' U
3 ~. z! i6 r6 s* E- include(Resources.id("mtrsteamloco:library/code/face.js"));' a$ A% p V* O
- ! r8 q1 [- N: ~) }# `
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( Q( c6 [* {* _6 y- T7 |( \' |( k- function getW(str, font) {
5 f; j6 Z% K U+ A8 ?7 m - let frc = Resources.getFontRenderContext();1 q& A) i" l) l9 q
- bounds = font.getStringBounds(str, frc);8 W9 [4 L' b4 s8 p6 t: o9 J/ k" A7 P c
- return Math.ceil(bounds.getWidth()); q& q6 Y7 y) g4 ^6 r' G4 Z, @ g _
- }
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- da = (g) => {//底图绘制
# |% B" @% e! U, w! ~3 } - g.setColor(Color.BLACK);
* {8 I$ `$ h, E* z9 H - g.fillRect(0, 0, 400, 400);: p& f! ]3 p0 `$ S* W D5 T; H
- }) H2 I f8 Z$ i2 z, e
& f7 W1 ]( H. ]" |( G+ {- db = (g) => {//上层绘制% I2 F3 k* h ~) k
- g.setColor(Color.WHITE);# Z, U3 A0 N+ l8 t0 C1 j
- g.fillRect(0, 0, 400, 400);
! a! D' \8 \# P" R- }2 o( B+ @2 k - g.setColor(Color.RED);
% h! P7 `! L2 y8 w1 H' d/ \ - g.setFont(font0);7 B: |1 F4 l- G6 j% ~/ P G" n6 ?
- let str = "晴纱是男娘";
% k2 X( B9 l' R1 a - let ww = 400;- ~1 Q/ q( i# O& S/ e8 U" ]
- let w = getW(str, font0);
3 N; C& R& v" L! H3 G; | B9 L - g.drawString(str, ww / 2 - w / 2, 200);( R" Z2 x' `+ ~) j# |9 J. Q
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; k2 Y2 n, d5 m- const mat = new Matrices();
: ^6 ^$ `, N. a+ r) T9 j - mat.translate(0, 0.5, 0);# ~, _+ L7 O2 Y' E0 r; M$ M; Z
- . i5 G2 \7 i' L* h: F1 G% x, _
- function create(ctx, state, entity) {
" ]* N' n' x- B - let info = {) L2 j. n/ W9 M. ?% _0 y- H) Q7 }
- ctx: ctx,8 A1 X7 J/ n( g, ?2 G
- isTrain: false,( z0 l _$ I( R0 G, N5 t. H
- matrices: [mat],% L. F' I6 @0 s5 Y" ~
- texture: [400, 400],* {! g. k( }8 j; b- w4 z
- model: {' l1 [6 A9 M8 s2 \4 G! W( d" X- c
- renderType: "light",$ Q2 J# J* V1 b9 R) H/ r6 E
- size: [1, 1],$ W) l* g( n; ]8 A7 W
- uvSize: [1, 1]
( [: b0 e& I1 u1 N; }7 ? - }
2 _' c! B3 ^" z6 k. N! T3 L$ g - }
+ I5 V9 o2 w5 r" N( B- y/ {8 O' | - let f = new Face(info);
1 v+ u! c+ K/ r0 T8 N - state.f = f;
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- let t = f.texture;
# I1 G0 }5 {3 M) { R) a - let g = t.graphics;
' G* A( t) K- H - state.running = true;: E% F! v! E6 e, x3 n) _6 t5 T
- let fps = 24;
+ X& o* X" |. `: U7 R - da(g);//绘制底图
$ w9 ?* |3 B4 X m - t.upload(); c* |* a, F) J# f! O) a
- let k = 0;. Q! }0 Q2 S" ]" [5 z$ p* r% A o+ R
- let ti = Date.now();8 M' }% R$ M: q* |. F
- let rt = 0;
! q0 I8 i1 u5 B! }- {% |8 A - smooth = (k, v) => {// 平滑变化
+ O. Z. p* A' v) `) c/ h - if (v > k) return k;" x/ m. m2 A$ Y1 S, B) P
- if (k < 0) return 0;
0 N- l5 b5 G# c" C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 b+ @" ^& Y9 |9 {1 i% z9 j% Z5 g
- }* Y, Z# ^3 O: C1 Y" c
- run = () => {// 新线程
/ c# ~$ Z& ^2 k' `6 A( ^) s - let id = Thread.currentThread().getId();2 |7 F) ]6 Z, n' p; w" e
- print("Thread start:" + id);- m$ T( _" Z. B) J
- while (state.running) {
! C$ v; c7 q" ~ - try {
9 Z* V% c" I: h C: z - k += (Date.now() - ti) / 1000 * 0.2;
! ~# J e) ~2 L& O+ |( I - ti = Date.now();
" g4 Z( G# r1 q/ |5 C' U# y - if (k > 1.5) {' }* W" L) z, f6 G
- k = 0;; j* c7 _3 g8 Z. c
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- setComp(g, 1);
5 [9 n' q' }; ?' c" T9 c% t - da(g);
6 z0 t% v# T l+ R) p3 @& a - let kk = smooth(1, k);//平滑切换透明度6 E4 o" F e# Y/ [1 ?
- setComp(g, kk);
% g: U# X1 }; r% F+ Y - db(g);8 d! t3 a- }. V1 h
- t.upload();
* d3 r. C: y% d8 F' j2 H - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 w% S9 ?' w# ^2 f l1 G/ X - ctx.setDebugInfo("k", k);
" c9 B* A- ~( f$ _, y - ctx.setDebugInfo("sm", kk);9 U1 c6 Q6 Q% @7 M2 _7 Z( i
- rt = Date.now() - ti;
/ [6 m9 U% d5 D6 E$ i9 J! e7 q/ Q - Thread.sleep(ck(rt - 1000 / fps)); `; Z9 H/ _- s4 R* I6 _* [
- ctx.setDebugInfo("error", 0)& z. C& x( N6 _4 D6 D' \
- } catch (e) {& p: ^" X" b& r, Q
- ctx.setDebugInfo("error", e);
9 Y& U6 r8 U( F+ G6 t$ p, @& | - }
8 I# d' g( J6 i - }8 ^6 p- J9 s7 b; q
- print("Thread end:" + id);4 O; v) X( F# Q$ q0 l
- }
# e1 `3 l5 _3 F3 d0 k( |8 M - let th = new Thread(run, "qiehuan");
' w9 f( X% i9 r$ L - th.start();
1 `) y* H0 K% j - }
; \9 P0 D. K, q
) t3 U f: R0 W/ [* p2 b/ t- function render(ctx, state, entity) {
. V- y3 y( S+ z. Z. G* R! ? - state.f.tick();
7 Z) w: [) K9 W# u; f - }3 a. |" j* g! e3 |. q% m% \
- ( k. N) ?' J$ N, c1 f
- function dispose(ctx, state, entity) {7 Y* Y; {' }) D# `6 u6 ^; `5 p0 n
- print("Dispose");
0 c1 `6 l5 g1 {1 p - state.running = false;- s6 V. p% E+ w' \1 [
- state.f.close();4 I: `$ S; D _3 O" x* s7 o2 X: a
- }6 b* R$ T7 ]1 L% I% F8 D
+ A, b2 ~1 e2 E$ f! X- function setComp(g, value) { K4 q- b7 o0 t
- g.setComposite(AlphaComposite.SrcOver.derive(value));
/ K( n3 T- W; N% Y7 B - }
复制代码 0 Y6 q5 `" e# r8 b2 a; F4 H# }3 _
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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