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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。+ U5 N2 e8 O' b. U- ^$ u, E
- importPackage (java.lang);
6 K" q. }0 t1 I: }; k9 P7 `& i; K - 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);# T- j2 Z7 y( B# O6 z
& a( D# B* ~+ H9 E# U/ R( t, C- function getW(str, font) {
% n$ _8 R9 B. ~! O - let frc = Resources.getFontRenderContext();4 G9 D. E5 N3 ^
- bounds = font.getStringBounds(str, frc);1 V) _8 l* B5 C. c, ?- s
- return Math.ceil(bounds.getWidth());
* c( v6 g( Z6 h7 N! I - }
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7 ? E3 @, |' q5 Y7 l- da = (g) => {//底图绘制& k- `7 \/ R; ~2 }5 M5 D
- g.setColor(Color.BLACK);
) V& S) v$ |4 s1 P" {0 o2 E - g.fillRect(0, 0, 400, 400);1 x8 U. X. ?! F0 M: W L( t
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/ j4 D5 a9 R8 A1 |5 x5 I- db = (g) => {//上层绘制4 |, J3 Q$ d! @: m- f+ g: v, ?
- g.setColor(Color.WHITE);% ?' c( O: C3 T* [# n1 s; Q/ Z! q7 N* \! @
- g.fillRect(0, 0, 400, 400);) i/ V, ~$ s4 ^8 P& _* y
- g.setColor(Color.RED);" z' [: e9 ?7 _. E$ H
- g.setFont(font0);
8 \8 i; N$ U7 p1 B) O# Z& c - let str = "晴纱是男娘";
" O3 s+ M4 j% o8 |2 s& { - let ww = 400;
& |$ N- { p! K% F7 ~ ]- R - let w = getW(str, font0);
+ a+ S" R; o6 V( U- ?# { - g.drawString(str, ww / 2 - w / 2, 200);
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+ K& t& ^ |* M, d, B, I. d0 J- const mat = new Matrices();
; v i" ^2 z+ H - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {( ~2 t) a! L8 D
- let info = {. |+ }1 y$ r- H4 |
- ctx: ctx,
! a- z7 r9 `4 X - isTrain: false,0 U) E5 b! N! @3 x0 r8 }
- matrices: [mat],0 {, R' A# }1 [2 l3 W% {" k
- texture: [400, 400],
* M0 P( }+ e( T [$ q T9 C( e) m% E - model: {
; X5 R+ [, a% t0 y! }7 V8 i - renderType: "light",
' Z2 ^1 Q% {; S+ h - size: [1, 1],
" f; D2 q! \1 u$ _1 W/ B0 a5 _ - uvSize: [1, 1]
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- }
4 G1 X H) Q- V! T1 C+ ] - let f = new Face(info);
! n" J3 {2 [& F5 Z4 V$ a. i5 E - state.f = f;
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- let t = f.texture;6 m" l& i% K! t0 g
- let g = t.graphics;
! L% i% J$ W# W1 R/ G - state.running = true;1 Q) b* t' f% [5 a; d
- let fps = 24;
, r/ S: ]# G8 U, H/ G5 l4 x0 E - da(g);//绘制底图9 P7 h2 K W( ~% ?: F. U2 i
- t.upload();
: Y9 h2 K0 S; n - let k = 0;
8 D9 b* _. I0 p/ Y+ }; E/ a0 f# y - let ti = Date.now(); D' h" W9 ?- ?) ~) b; s
- let rt = 0;
: G2 [; g$ S0 x B - smooth = (k, v) => {// 平滑变化
, |+ c f* z0 Q, p( [ - if (v > k) return k;. u9 M6 i+ Q! P& h1 i- V. p
- if (k < 0) return 0;
( g; N, u4 x O8 v2 d - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 P: N' H8 i! L+ p
- }0 ~/ X: k5 s, n: l7 @& o: E
- run = () => {// 新线程3 J; K8 ?: T3 `" i r
- let id = Thread.currentThread().getId();
/ L9 q. c$ H+ j9 V4 d* R. j* j6 m- S - print("Thread start:" + id);( o ?# _4 P1 `
- while (state.running) {
" M j/ q- V3 }; i - try {$ ?' ` E/ X1 l6 ]
- k += (Date.now() - ti) / 1000 * 0.2;
& c& o& E |+ Y: |2 H% s - ti = Date.now();
6 _, ~( G6 F6 t/ u - if (k > 1.5) {
$ i | Z8 \8 Z/ r* g6 T: l - k = 0;
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- setComp(g, 1);
0 \/ H0 X4 V9 J# d9 O) s" E - da(g);
# C- s% ~+ ?( J - let kk = smooth(1, k);//平滑切换透明度$ s0 v4 z2 E% [/ B% _
- setComp(g, kk);
- Z- ~* J2 E) g0 ?6 ^# R5 {' D - db(g);/ ^" r; Z' f5 i; t" D
- t.upload();
8 @2 C" {8 x7 A2 o0 Z: u7 B - ctx.setDebugInfo("rt" ,Date.now() - ti);" l' ^& \- }$ d5 g3 P
- ctx.setDebugInfo("k", k);
) Q0 `% e7 T3 b: t8 | - ctx.setDebugInfo("sm", kk);( h3 x @$ \: v, s, V/ O6 L& U
- rt = Date.now() - ti;7 ]) N3 F n* b9 _
- Thread.sleep(ck(rt - 1000 / fps));
7 }" w8 n% N2 ?7 ` Z1 {- j: p7 @ |% F - ctx.setDebugInfo("error", 0)" O& ]! s* V, C! u
- } catch (e) {, u- ^; f- j* i1 y+ l. @
- ctx.setDebugInfo("error", e);" e5 x2 c2 ^8 ]9 S+ N5 Y
- }; I9 k. n% L6 D% j, v/ t4 E! T
- }
& }! [3 \' K B: r$ b2 t - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
* Q0 k9 l, L% E+ n e - th.start();
% A$ y& R0 d* K5 H8 F6 e - }
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' t6 D1 c a4 f# X4 w- function render(ctx, state, entity) {
6 u A0 o* b9 {; B v: D U# X1 \ - state.f.tick();2 S/ }! K n0 Q) d6 J
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4 z8 b) v6 F: Z& g- function dispose(ctx, state, entity) {) k5 v" k F- k3 [* C5 D) F
- print("Dispose");/ e7 k+ y/ w. i
- state.running = false;0 P$ T$ E0 F/ N" G6 |" Y$ w1 w
- state.f.close();
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( }1 c b9 f9 i* s3 y% j. L- function setComp(g, value) {' q7 b6 j. }& I
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 N% P0 t& A2 i ?- u9 q - }
复制代码
. h Y% K, m+ J; 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。% z! `3 @, u' y4 s' Q+ C5 o
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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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