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: l: V% x9 ~+ ?- o9 i1 M$ s2 o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。: D J8 I5 a0 Z5 Y$ R
- importPackage (java.lang);( p3 [1 I( z7 r. y3 }+ I; H/ [
- importPackage (java.awt);
: \# r) }, _0 [; F4 ?
2 d: d- l' m" P& j$ M9 ^- include(Resources.id("mtrsteamloco:library/code/face.js"));
6 i0 Q- F+ s+ N( o9 I - ; v3 f$ B* Q) a( T0 ]
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
t, ^% _8 A/ _2 z3 L' L# b& C
1 Q* N+ V; i5 d" B" n; l" L( B- function getW(str, font) {
* [2 c3 l& ?' `: z& c+ v8 x; ^" G0 I - let frc = Resources.getFontRenderContext();
8 `& S* J6 U5 K" _ - bounds = font.getStringBounds(str, frc);9 e. R. O9 p O% Y3 r
- return Math.ceil(bounds.getWidth());
8 a/ z7 r& i% f - }
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( Y S4 N% @* e. G- da = (g) => {//底图绘制
; N* w/ K* f, J& Z5 j( g! b - g.setColor(Color.BLACK);
9 e6 N; @5 q3 w' Z& ` - g.fillRect(0, 0, 400, 400);
5 _$ @8 e; K7 e. @9 s - }, D z7 f; S. Z8 m- F, G
7 {: }: J; T: E; h( n7 \- db = (g) => {//上层绘制
2 C" N1 }! o8 J* Q9 E - g.setColor(Color.WHITE);* P" L# {0 j8 H) U
- g.fillRect(0, 0, 400, 400);
# `+ n; T& \' n - g.setColor(Color.RED);
8 x4 a! N* K% b1 d - g.setFont(font0);
7 P; L( E6 L$ W, [$ @1 r/ M - let str = "晴纱是男娘";
0 c/ M2 z4 U9 V% j - let ww = 400;
+ S" J7 s% ~$ J% w - let w = getW(str, font0);3 g, f; c. r5 G& L4 A& s7 d
- g.drawString(str, ww / 2 - w / 2, 200);
) Q, |# N- A+ ] - }
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% E2 `% l u# H6 ^, N: t. }- const mat = new Matrices();3 G& X7 S d; S y
- mat.translate(0, 0.5, 0);! F% h& o* f+ d. M3 f: H
8 \$ U1 [& W( t! \" c% l+ F- function create(ctx, state, entity) {$ R& g2 H( g; V
- let info = {8 b0 F+ N3 w- `' O% `, Y% K
- ctx: ctx,2 o6 c# G& E: o8 Z( l
- isTrain: false,5 ]/ A* q- f: ?& `; ^' ]% Z
- matrices: [mat],
- F- h0 @5 q" Q - texture: [400, 400],
, x) x8 I0 E9 l, I8 _7 Z - model: {
3 A8 ^3 H# u5 H _' t- s/ G+ ~, ` - renderType: "light",2 S( t0 U& I8 C2 e7 l
- size: [1, 1],1 _3 O& P' N3 y! Z+ p: t9 M
- uvSize: [1, 1]* U! \ c) k1 y1 [) v- c" h
- }
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- let f = new Face(info);$ p" J. L6 w. j6 W, a
- state.f = f;- a. ?; [. F V; H$ c% i! [( q
- / v1 Z: u2 ]) l
- let t = f.texture;
~, F0 _8 h6 p2 [ - let g = t.graphics;* m( B% R, l8 D6 Q( w4 l: _1 s
- state.running = true;
8 |7 u! l# b& ?' R G" O - let fps = 24;5 y) {6 J2 {) L! Q0 C
- da(g);//绘制底图
" B* X; E( q3 j. L) M8 @0 r - t.upload();( \9 _1 m6 P; j6 M
- let k = 0;0 { M( f7 w L" v8 h) L* ^
- let ti = Date.now();& B: B$ f8 v6 G% H! \+ P
- let rt = 0;
2 `! y$ t# [ a- ~/ N. s' |3 m - smooth = (k, v) => {// 平滑变化
3 O( S; g# z1 Y' R. E" u - if (v > k) return k;: C6 l5 J0 G5 ?9 T
- if (k < 0) return 0;
) b9 C) A: L' P$ z! z# ^ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 D( ~; p& H2 L, `' ?6 B - }
7 C. M' m, H) Q. Y& |0 q - run = () => {// 新线程3 p' E$ z' W5 e
- let id = Thread.currentThread().getId();: q O# G$ l- N9 g# K
- print("Thread start:" + id);1 R! M" ~4 m! e( c1 @
- while (state.running) {
# H1 q! v3 D& r3 P5 m - try {2 j5 u# G3 U% v Q% h& I E* q
- k += (Date.now() - ti) / 1000 * 0.2;3 w% g4 F/ Q& }
- ti = Date.now();% C# H) M4 m/ G& r/ V9 O7 ] j
- if (k > 1.5) {$ s7 j6 L. f' f# k, v
- k = 0;4 [1 H5 C: ~7 ]9 F
- }) U6 j$ P$ M5 v$ s& }, G& C+ P
- setComp(g, 1);
8 @4 {' L7 y( M( C$ Y! S, V1 b - da(g);4 M3 c' M, g9 E( e
- let kk = smooth(1, k);//平滑切换透明度; N4 E+ A+ m' w6 |+ f) T2 ?5 P
- setComp(g, kk);5 ]2 R, D. |% n8 B. g N
- db(g);# n. M3 W0 X+ p
- t.upload();0 W3 ~* M3 B4 }% Z+ C9 N
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& z! E" ~; A) b5 i. |5 X - ctx.setDebugInfo("k", k);& R; q& M1 w1 u! @. U
- ctx.setDebugInfo("sm", kk);
8 L: k" I3 x5 }0 D$ o5 c - rt = Date.now() - ti;1 R3 D1 }' P- c; y5 P9 C
- Thread.sleep(ck(rt - 1000 / fps));; D) _; O5 N& C" Y1 M
- ctx.setDebugInfo("error", 0)
& ^& C1 P* {1 F3 H4 \" Y% o& W - } catch (e) {
/ ^7 s! u4 G3 S; U+ J6 g - ctx.setDebugInfo("error", e);
) f6 c* |$ _# l5 T: e) x4 }1 k - }
0 F5 A- ]8 P& m3 C& v0 e - }
7 v! Z/ g% L8 @# M! I. E - print("Thread end:" + id);
0 u& B: l8 j& M+ C4 Z) E( y" t. u - }
7 W- s( A; g: g - let th = new Thread(run, "qiehuan");7 d3 X! C' b, a' b6 ?5 M( a1 I {6 g+ l: ]
- th.start();5 _, a5 P! C' `" o
- }
- W3 Y5 t) \0 N7 } - + ]/ ~7 h5 L: T
- function render(ctx, state, entity) {- E# s9 v W2 ?1 V9 L8 B! Q
- state.f.tick();1 W& R. ?! j& e( _ m3 H. `- ~
- }
* ?# s9 P+ u& C, h+ |- D3 a! H - ) P) n% G3 b; z5 a
- function dispose(ctx, state, entity) {
: L+ g) P' `% Z& S( h5 U O" b - print("Dispose");
! z) z3 v8 i& _ - state.running = false;
: Z2 g5 t# s- e! Y - state.f.close();+ K# b! U! d) }2 F" ?4 Q! X
- }; n5 ]5 w' m' A1 X4 \- A
- 7 B, B2 h- o* y2 V, [- p
- function setComp(g, value) {
& k5 y' ^; A5 R0 O L - g.setComposite(AlphaComposite.SrcOver.derive(value));
( F4 G9 m( D/ |4 [' k/ R - }
复制代码 / m: b7 B2 ^, q. r
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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- W1 {! i9 b" i2 M' k, E% B顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% v; P4 w) w* |6 u3 L6 ^
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