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3 x, [, Q- |9 F3 I, i; j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。1 U% {8 I$ U7 u6 @1 ]3 y" u
- importPackage (java.lang);
1 N0 X8 t7 _# L. S6 ] - importPackage (java.awt);! N, G4 r/ P, n
- 1 } G; B, F$ Z+ t9 A) k% X
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 u/ k- l1 p7 d' l' U" D; o
. p% U: E2 D; \' v/ `6 x$ S, h- function getW(str, font) {9 J; v9 o+ f! c+ h5 G; Z! k
- let frc = Resources.getFontRenderContext(); V$ b# F& V0 s* p+ s
- bounds = font.getStringBounds(str, frc);9 M8 @# m7 _7 a" r6 _7 l
- return Math.ceil(bounds.getWidth());
+ q- ~9 Z r8 y! H! A* ?$ c9 Z - }
( e# K1 ~% Z2 Z$ O% X
: y0 g0 h# i" e" Y! {- da = (g) => {//底图绘制" M8 \& X) o: _ ]' a& P
- g.setColor(Color.BLACK);
; R8 \' o4 D F. ?3 p' p$ K! k/ {7 N5 z - g.fillRect(0, 0, 400, 400);
& C C7 t# Z- ]0 F+ [- N - }
+ L, A' ]5 O; S! q# P& n1 O8 C
7 G6 N* z' J2 L. C* p1 k/ e- db = (g) => {//上层绘制
! O' B+ X" W8 D* Z* F2 C: I - g.setColor(Color.WHITE);
& u/ N* w0 ^7 Z p! [: j% n - g.fillRect(0, 0, 400, 400);
) A% g. F1 O& k0 r$ H0 W& e - g.setColor(Color.RED);6 e* _/ C5 X1 u. v3 r" t$ O; _& i
- g.setFont(font0);) S! U$ l1 |& F+ I# k
- let str = "晴纱是男娘";9 n, R3 F) t7 z5 B' j: Q* E, e3 U) z1 a
- let ww = 400;
! P) `& I6 y7 m! S - let w = getW(str, font0);2 O4 K S" X$ Q
- g.drawString(str, ww / 2 - w / 2, 200);
- F- Z M! |8 U1 T1 ^" C! A - }& ~) m; E. P% e. `: T+ w7 Y! k7 |
?2 Z0 w( ~1 y- const mat = new Matrices();
# K+ H2 `2 [4 O7 K) j - mat.translate(0, 0.5, 0);
. g! f+ c& [% N4 E6 Z - % ?' I) i" L& D7 p
- function create(ctx, state, entity) {
% `- ^2 W: n& y9 ^) A- Q - let info = {# c3 v/ `6 p% s X
- ctx: ctx,/ x3 N* k* H: ^. Y% ~
- isTrain: false,- v8 {9 D: j: T! W! }0 }
- matrices: [mat],
# @8 P+ q6 h( ^+ v - texture: [400, 400],
8 d5 e$ X0 a! d$ |7 F$ N. U - model: {7 i. Z9 j( E# H3 j) O* p
- renderType: "light",
* S) I: {& q+ X - size: [1, 1],4 l0 Q; \( B; W3 k3 ~! P4 ]
- uvSize: [1, 1]
s W7 g0 B% A! T7 f% Q- P - }
) |/ ?' _! x& x. m9 a$ O" @! e - }
7 t7 p- j+ R, C7 D. |! { - let f = new Face(info);- U! E; t5 W; x
- state.f = f;
2 x P# d' k. t5 v1 p
0 q; S% x. \+ [ j/ u) i; c1 Q- let t = f.texture;4 |# q6 I# E: \4 p/ F
- let g = t.graphics;8 H+ e+ Z* K i( Z' O
- state.running = true;. z/ A3 B0 H& u5 l
- let fps = 24;
6 n9 d6 K! d2 M/ f) E( E1 p! q - da(g);//绘制底图$ W. J/ y/ B8 ]- J
- t.upload();' C# ^/ y5 i5 o. V
- let k = 0;. ^( W u @" N9 Z7 A% _
- let ti = Date.now();+ ?. S# y) f5 Y( K/ z6 I
- let rt = 0;
$ z! `1 ~6 y, v; ]0 h) V5 O. L - smooth = (k, v) => {// 平滑变化
2 \5 \) p [# T" v3 `8 J; Y - if (v > k) return k;: R3 B5 c& L3 ]0 p: q
- if (k < 0) return 0;
! Z: `# m. ~4 o( | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' _$ u) V A: y4 J& K/ Y n - }
2 r+ W" u( q( x1 K - run = () => {// 新线程
% K; ~$ E1 R1 P2 \3 w _ - let id = Thread.currentThread().getId();
; I1 Y W( G3 A4 y8 S - print("Thread start:" + id);) N6 u P/ }: {
- while (state.running) {! G$ [& F- r, }# p
- try {( K; `! _8 E2 j( R5 k' F0 b
- k += (Date.now() - ti) / 1000 * 0.2;% g" p9 A% S G: [# h
- ti = Date.now();
% U. h5 E0 U: T( X7 b3 r3 i - if (k > 1.5) {
' H4 P5 C W/ U - k = 0;
: K/ ~5 y) V3 a8 g; E; Y - }8 w1 E" M8 m& Q6 k/ X& j; W3 y; e
- setComp(g, 1);
* D# e5 a2 l9 r# u( y6 ` - da(g);0 [- y8 @. o/ j+ `# W4 y
- let kk = smooth(1, k);//平滑切换透明度% @ B% `: l8 q+ z' R& J, a
- setComp(g, kk);
# M3 I# N: }3 P+ H) L( A) \0 w1 d - db(g);. |2 I N% m- T# e, b- r
- t.upload();
& U4 @' V% U/ L, k - ctx.setDebugInfo("rt" ,Date.now() - ti);; Y/ n8 j7 Y& e/ n: R2 k" p9 `
- ctx.setDebugInfo("k", k);
; V0 t5 x! o2 E* L- ~/ i! x% ] - ctx.setDebugInfo("sm", kk);
( x e; T+ r. t. t - rt = Date.now() - ti;. M8 f m" m# G% C8 F
- Thread.sleep(ck(rt - 1000 / fps));
, o4 E9 L9 l6 v) [- y7 m - ctx.setDebugInfo("error", 0)
. e% [% C# G5 f0 C, Y0 A) `% w2 D - } catch (e) {
3 E( E# V2 V& x0 Y3 \- b/ B a' o - ctx.setDebugInfo("error", e);3 }$ K/ G5 n! i( ^8 i8 A. U" v
- }
7 A4 e V3 ^5 t% ~8 k5 |% S) b% z* @3 w X - }4 [- Z: y7 \$ d7 f4 N
- print("Thread end:" + id);( o/ s; N u# A9 b( t. W
- }
! e% @' Z" {3 P; I. M - let th = new Thread(run, "qiehuan");
9 E( u( R" @( w- r3 C* M - th.start();5 e' o6 X% S4 Y; z& I
- }
2 T9 H6 R4 d# U! A4 R" z1 ?" Z
1 I6 K; c" k0 Q- function render(ctx, state, entity) {$ H5 H$ ]4 V k9 m
- state.f.tick();
0 }4 x: s1 x, N - }2 X( ?; ~; A0 w9 t+ k0 w+ N
; E0 T: P0 b1 g3 d6 z2 R- function dispose(ctx, state, entity) {
1 u( J. e3 i3 r: o% a. B# p- x, h - print("Dispose");
# u0 |7 K0 C/ F& s - state.running = false;4 r* [, s7 e X$ D/ ^
- state.f.close();
0 N% @" M7 A7 y6 y- M. ]( v: f* X; D - }. b; V7 M$ F: p0 b9 F- ~9 i
9 h7 _+ @' P* z8 D2 Z% l9 u- function setComp(g, value) {
4 m' J& t) S, Y1 `. p. ] - g.setComposite(AlphaComposite.SrcOver.derive(value));& o& S' a6 y+ B2 M( `
- }
复制代码 Z( M7 K+ U7 w9 V1 b! U# V
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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) Y6 a9 x. h4 J Q$ W) v' N3 T3 \) d7 p; b2 w! e8 o
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), D9 ]7 c, D5 v+ B
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