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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。* ^4 | d% f1 ~& R
- importPackage (java.lang);
/ e; V8 w+ Z/ z7 r; j A - 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);
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- function getW(str, font) {3 \9 I3 m* Q$ k; V. f% t6 z& ^
- let frc = Resources.getFontRenderContext();
& A) |. K6 C+ K3 y4 } - bounds = font.getStringBounds(str, frc);+ L: ]- b$ Q2 D& A. g1 r
- return Math.ceil(bounds.getWidth());# R4 l% z8 f) O+ i; g! R9 R$ X
- }" c0 J+ \' T* a4 Z, N
- # a6 h: e/ E0 ?! q: t+ B; Y
- da = (g) => {//底图绘制
" u7 B" r* O1 w: G5 ]9 A - g.setColor(Color.BLACK);
+ x W- a6 Z( W9 r# e - g.fillRect(0, 0, 400, 400);
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7 R: Q0 Y' X% u6 w& d7 b- db = (g) => {//上层绘制: [; G: S2 S( }' s+ i; U& M
- g.setColor(Color.WHITE);
: B7 ^" W* t- w0 u9 x - g.fillRect(0, 0, 400, 400);7 Y6 N* s2 o- O7 j+ y% K* L9 f+ B
- g.setColor(Color.RED);
, ?4 H5 _2 S4 u- _ - g.setFont(font0);+ I- b+ X( w1 R8 F8 a8 @2 G
- let str = "晴纱是男娘";
" f9 o2 y) e0 u: l' y$ y- [/ b - let ww = 400;
: z3 Z7 R7 B8 p4 e) g8 ? S - let w = getW(str, font0);
. d6 `, q/ [' h. O* v$ [5 Y - g.drawString(str, ww / 2 - w / 2, 200);8 b0 d, z$ y8 O W
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' b" i7 @' ~/ z) ?" }- const mat = new Matrices();3 d1 @$ v2 e+ R
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
1 z9 V+ o$ M* V W9 S* k* @- R - let info = {0 U# F$ r* m* j$ y
- ctx: ctx,
" f& X6 O1 @. H; T( o! M: v - isTrain: false,6 X' l9 A% R3 @8 O7 r
- matrices: [mat],
9 p9 W0 j" p8 s9 `2 `$ ]* h1 V - texture: [400, 400],
" y/ [5 {! G2 g: Z - model: {- Q4 l4 p8 D. E, F* L
- renderType: "light",
; Z( S7 T0 r6 u - size: [1, 1],
$ ]& H- V0 A! M5 T5 K: e9 M - uvSize: [1, 1]
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- }
; ?, e' e' s0 k( B% `+ A7 h, e3 m4 Z+ q - let f = new Face(info);+ j: g i& k4 h
- state.f = f;
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- let t = f.texture;! {* n/ E, O6 z0 i
- let g = t.graphics;
6 t1 B* D9 M& L; E - state.running = true;
# d, F, j5 \$ z% t6 j - let fps = 24;- }2 N9 l6 ]8 k, Q$ W/ B3 v: Y- D( K
- da(g);//绘制底图
# [6 G$ G0 n4 z. m7 o |$ H4 E1 G - t.upload();* E: u! {% L/ [1 q* ?" u
- let k = 0;, o6 j! m- ?$ M" M. @) X& I
- let ti = Date.now();- O; ]4 \ k; D
- let rt = 0;
& w" \& ?/ [: c( g, W - smooth = (k, v) => {// 平滑变化" M. M7 \# w3 L$ a+ s9 d
- if (v > k) return k;6 w) e# B) B. r& g" @- o/ @1 _
- if (k < 0) return 0;# T# }3 Q5 N8 J" u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 P* B7 U+ j; L4 |: m6 o& l
- }5 s2 z0 n; h1 [1 Q
- run = () => {// 新线程
. z! y8 [- F/ ]& [- C - let id = Thread.currentThread().getId();/ I! `5 m' S5 C
- print("Thread start:" + id);8 r9 m6 t- r0 r. z1 r2 m& u
- while (state.running) {
6 s4 {( j& C2 M2 k l0 \ - try {2 r; J5 D* B2 \ w
- k += (Date.now() - ti) / 1000 * 0.2;% z E1 |8 z8 _
- ti = Date.now();
# N2 |8 c8 ?' ^! ^9 K$ n - if (k > 1.5) {) `! p4 r6 M8 j# U) n& O, m
- k = 0;
4 P$ T& p5 K9 x9 E - }
" D( I8 p4 e5 J! z - setComp(g, 1);& p5 s& f, f) _' a# Y" a
- da(g);' c7 v% V6 S+ N
- let kk = smooth(1, k);//平滑切换透明度- n# P# w& c: w1 X) {
- setComp(g, kk);* q$ E+ s5 e$ D
- db(g);
1 {4 Y2 R( X0 g; m - t.upload();
1 Y! q. l% B0 E8 M9 x: A8 z - ctx.setDebugInfo("rt" ,Date.now() - ti);- G" \' N5 ^- c# D/ f1 O
- ctx.setDebugInfo("k", k);( N9 ]& i' U6 Q2 a2 g
- ctx.setDebugInfo("sm", kk);
* [/ w; J0 u% t$ N2 |. t& m# h - rt = Date.now() - ti;
5 Y* X. w. E( S5 H) ? - Thread.sleep(ck(rt - 1000 / fps));
" ~4 w# d/ | \' n3 ?6 I - ctx.setDebugInfo("error", 0)) S$ W- U% y+ u; N
- } catch (e) {2 Z& _6 E/ W7 O+ \# d7 h" ?
- ctx.setDebugInfo("error", e);
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- }/ u5 Y e7 e* g+ I1 g4 |2 b
- print("Thread end:" + id);3 i4 W/ ^9 `5 d/ l; R- c% Y# M
- }; \; a' h3 A: ?, f
- let th = new Thread(run, "qiehuan");3 J5 Q& }5 s% s) Q% e: l" N: n# f& E
- th.start();
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- function render(ctx, state, entity) {
8 ]# Y) e3 P+ {- w- r O - state.f.tick();
7 j; F. ] ~$ B" I1 _8 K: P3 g$ v - }
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7 _' N6 Z& k L n6 g- function dispose(ctx, state, entity) {
6 W" T" }7 o) X! E2 l6 y - print("Dispose");
% V! ^) X* V' v1 y# V2 g - state.running = false;4 } f* l! D: U, }# H0 L6 h" c
- state.f.close();
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3 c; s( @' F. C* {" x8 f2 i! m: \+ I- function setComp(g, value) {
, P0 A5 r3 z$ [. N9 ?, a - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 O5 N F1 c! j2 o" G - }
复制代码
' F/ m. O6 |, `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! T$ O5 Z" T9 A0 d7 T% [* N
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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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