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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。
! Q: ?* B2 [* @8 s) d0 O: \- importPackage (java.lang);* M, _+ c, T5 C9 J) Y$ g& H
- importPackage (java.awt);; o) G' A% s+ h/ q6 s- |" e7 R
- 1 Q! b$ \. _' w3 W
- include(Resources.id("mtrsteamloco:library/code/face.js")); F, w# Q3 ~; v* b. L! A
- - j: Y* Q$ e* u& K0 R% L
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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) R" x) E) T: y) s8 g- function getW(str, font) {! {) d _2 o+ A# v8 m6 G# d/ d: u
- let frc = Resources.getFontRenderContext();
' A: Z7 B. ?9 d8 ^" r# u4 @ - bounds = font.getStringBounds(str, frc);
4 s6 I0 V( Q" e* ?/ B - return Math.ceil(bounds.getWidth());
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1 `: `8 o: d) G' O" j- da = (g) => {//底图绘制7 n( A$ d* g7 h3 P- ]9 f
- g.setColor(Color.BLACK);& x8 Q6 b# B4 I( o2 P: H& m9 @
- g.fillRect(0, 0, 400, 400);
2 \4 \2 a# d- s+ h( z - }, q: d d8 Y; d" j1 f; J
4 ^4 R( I: Z8 s% S9 W9 B9 M- db = (g) => {//上层绘制' o- t2 ~; y; a! w2 O. N4 n, d
- g.setColor(Color.WHITE);! p1 p* S6 k5 h% p" Y1 g
- g.fillRect(0, 0, 400, 400);' h5 Z+ s" g$ z' b( d
- g.setColor(Color.RED);
: t0 y W9 b$ |) P% S: b. o; { - g.setFont(font0);7 u7 p% R m, ^+ A Z
- let str = "晴纱是男娘";* j. ^, T) m. I* u+ w* d3 F- z
- let ww = 400;8 @9 w6 y, U F
- let w = getW(str, font0);3 q: k! h0 H+ @4 b& X
- g.drawString(str, ww / 2 - w / 2, 200);0 C/ J$ q1 C- B; U2 X" x; v+ _
- }+ Q" W# J6 D% Q& Z9 r' z
' n/ i; Z" q# G2 q4 ^5 C- const mat = new Matrices();
! k* R& ?, Z6 O - mat.translate(0, 0.5, 0);& _* D% Y. A. g2 m: L' I+ l- N
n8 F! G' n$ e. |' L- function create(ctx, state, entity) {2 p& D& V8 M8 X0 k5 [7 l
- let info = {
. ^# l+ K: P3 @+ u - ctx: ctx,, {* r' T* b2 p+ g! X- d* R" u# y
- isTrain: false,6 J" l$ }0 A! D' L
- matrices: [mat],- k$ [/ s+ u: B
- texture: [400, 400],% }! A, j; L9 d" R
- model: {
( m" V' O U1 m! `! b3 ?" R - renderType: "light",; x, m6 `2 J# r5 {& {
- size: [1, 1],
/ y4 e/ E: j! O0 H - uvSize: [1, 1]& f$ S- [1 ? |* [4 p
- }
+ @. N8 [2 X. o. \, r1 P - }
8 K" F3 \- f4 |/ `% S/ Y1 A - let f = new Face(info);
1 Z' ^( h M9 `" c. ~9 n - state.f = f;* x2 v8 ^0 b; u( j9 g& ^3 E
- 6 f& [5 ]$ V1 j7 A& u6 H5 ^# g3 a+ E
- let t = f.texture;
' W5 W7 |; R$ |2 p - let g = t.graphics;1 ~8 x, E, k0 s1 [
- state.running = true;2 h1 h( F# c, f( ~- p# K' ]- W; v
- let fps = 24;3 `' Z/ g+ S! m0 P2 \
- da(g);//绘制底图' |8 `& e. c- p1 D# M
- t.upload();8 y- R: m/ @# L+ y8 j
- let k = 0;( [; C$ _. i, I% k: A2 K
- let ti = Date.now();8 p1 P n$ S. `- Y O9 ^
- let rt = 0;
7 K9 e+ S4 K7 s7 _ Q0 b: N5 `. P. g - smooth = (k, v) => {// 平滑变化 @( l1 x8 y" i2 _1 D
- if (v > k) return k;
! ~3 o6 e' D( P4 q/ |9 } - if (k < 0) return 0;/ b& d) V g+ i2 t7 \! M$ ]: H3 _
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ [$ b0 k( _' R! h& G6 \9 B
- }+ _) a' x: t. i6 R
- run = () => {// 新线程/ e, N: o' g. a! R" `
- let id = Thread.currentThread().getId();
( l' l* h6 |. i/ w' b# D/ O# y$ k0 q - print("Thread start:" + id);
% B6 F8 i* O$ g. ] - while (state.running) {! C' J; Q9 w* @
- try { B3 h/ G8 i3 Q3 V
- k += (Date.now() - ti) / 1000 * 0.2;! Z R9 _2 w0 }" [! ?+ b0 _$ _$ w
- ti = Date.now();8 O, x _3 w3 I8 z
- if (k > 1.5) {
' `6 F% `: d Q+ _" t. h - k = 0;
; E* W$ z6 {" Z' H& n - }
. _9 v ]2 Y P3 E) ]* H. C - setComp(g, 1);
+ c K8 r9 P& A9 j3 g7 {) l - da(g);
8 ?: e% P9 Y: k1 t* ` - let kk = smooth(1, k);//平滑切换透明度
. y! y! X% `1 g, g& i - setComp(g, kk);5 }0 W% [2 U) }; N. X+ ~
- db(g);
0 g. N, z/ H% Q# l: [ - t.upload();8 x+ H5 E6 S9 ?9 [" m' @
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 _0 S5 C7 t; V/ r4 V: l( _' ? - ctx.setDebugInfo("k", k);6 j# e R# `/ t7 [& t* k9 L
- ctx.setDebugInfo("sm", kk);
+ z. g* |, S1 m5 |+ B2 @" L - rt = Date.now() - ti;5 w3 c X2 p! ~: r3 y8 m( ^* [
- Thread.sleep(ck(rt - 1000 / fps));
% D* {1 o& \" A - ctx.setDebugInfo("error", 0)! M1 M$ j1 ?. z8 @* k% j, E
- } catch (e) {! w+ O' q% T. p4 E9 g
- ctx.setDebugInfo("error", e);# J! F1 T+ O; ^1 \
- }
$ L; v5 ]* ^' E3 }9 R. U4 T - }
; R/ Z7 }8 k U& i) E2 O - print("Thread end:" + id);
7 ^& d, g3 }0 ^8 E2 l0 A) d. { - }
& A# |+ Q! x! E4 j; Z$ F - let th = new Thread(run, "qiehuan");( ?) s5 H; S- c' U) H( g+ v
- th.start();" Z- E$ F6 k1 x* K
- }
0 U& P3 O% C$ I F* J - 4 ~, I0 K+ q) j$ [7 B; _" Q
- function render(ctx, state, entity) {
0 M! Y) C* u, B! X - state.f.tick();
8 D9 e/ I9 o5 G* i - }
1 _. F) l' Q% p
Q) L" i( N: I' w- function dispose(ctx, state, entity) {9 O4 V s0 _( ^, M3 q
- print("Dispose");: }6 D/ n$ b: o8 `3 o/ R, o) W8 T! `
- state.running = false;- Q& O- J% M3 W
- state.f.close();
4 q) M4 i- E. n( U$ m$ w - }# K% u+ q4 e3 W v$ @; h/ V2 M6 O
- 3 t& x8 W9 l# @ H; a
- function setComp(g, value) {( }( O9 q( v) W0 S: \! P+ z8 C5 B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
5 H: A# d" ` Q4 k8 Z% Y3 n - }
复制代码 " u: k: \1 h' F( 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。
1 c0 f K# i( u. T4 Z# @/ B* E6 o: \6 n ?6 ^$ U
% g2 H8 E$ y$ X! f9 g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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