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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。2 }# k S; [1 G* [+ R
- importPackage (java.lang);
: h' O: [ A8 H% B1 G5 N t+ ]4 d - importPackage (java.awt);
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9 C" Z* X7 R8 h! F- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 C" L, M) T7 [1 E# a
- ; x7 q( i* v" Z1 b' ^% J
- function getW(str, font) {
# I H9 m) q3 {4 O- ` - let frc = Resources.getFontRenderContext();
8 J; H- D6 P* k3 \0 q: b& ~, t - bounds = font.getStringBounds(str, frc);9 n6 t4 Y7 o" f) k' u
- return Math.ceil(bounds.getWidth());# Q& W1 z5 ]7 x5 ?
- }+ ]2 {2 P0 J( y4 {2 f
E, @) b- F1 L- da = (g) => {//底图绘制; F: m3 ^3 V. {) \+ |+ i8 L
- g.setColor(Color.BLACK);! E' r, Q9 B. A# U
- g.fillRect(0, 0, 400, 400);+ _3 H( R& n6 ^" ]& s8 ~/ _$ \: {
- }* P, p" b4 F* g* a* |9 m$ K
9 j+ u1 @8 X9 Y) S- db = (g) => {//上层绘制
) o( w b: m( x: _ - g.setColor(Color.WHITE);' U* c& }- r# G& k4 h' {% ^0 p
- g.fillRect(0, 0, 400, 400);
1 t9 @9 l S$ {. k* k Q - g.setColor(Color.RED); @3 G4 c# L% w/ M
- g.setFont(font0);& x) s. P; }$ r1 \ A# {/ I! o- p' i
- let str = "晴纱是男娘";
2 J9 Q' [: u( E6 N0 T - let ww = 400;
4 Z( o; Q! ~- d% m: v1 k - let w = getW(str, font0);
$ P$ P7 U; D5 ]2 V, G) H8 M# d - g.drawString(str, ww / 2 - w / 2, 200);, F2 }7 w0 u" _& c
- }
$ d( H9 N' _7 s& s9 T1 ]/ D - 3 A( v4 X0 p0 B" X# C& ?. \, E
- const mat = new Matrices();
$ T4 d6 x, {4 w6 S' J# L5 V& b - mat.translate(0, 0.5, 0);
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. C6 |. s6 t: ^% o z( U/ V- function create(ctx, state, entity) {
8 X( _& ]9 u0 q# ]* J7 g; D - let info = {
: S5 U; @2 b% | - ctx: ctx,
/ T( {% _$ r M: o - isTrain: false,
% M# }3 j& [1 c8 ^% m9 D - matrices: [mat],. S. v( l& h, t4 Z# T
- texture: [400, 400],
5 w1 G Y1 a- K# W! T - model: {
: `! }7 R/ R5 O! O$ g6 a - renderType: "light",$ d' {3 Z- r$ c: w& {6 w
- size: [1, 1],& `& |. ^; A* g/ U
- uvSize: [1, 1]; R) O- u1 |2 Z; i/ l
- }# z) X* u' `& ^) O& @7 f
- }* e6 }6 i' @8 A$ d% F
- let f = new Face(info);
- y6 N! O1 ?$ F z - state.f = f;
2 F# t: I% V5 D- ~3 }
( b& G# N! }5 E! C. t1 W6 m- let t = f.texture;
; n% O1 y2 r5 J" v - let g = t.graphics;3 t/ k$ V1 ?6 z9 ]- C& @
- state.running = true;
- H" Y0 @: ~8 q5 k/ J1 y& t/ B - let fps = 24;
* x5 |6 Z x! |/ J: @ - da(g);//绘制底图, F& y r/ `/ i$ K9 m# L( @( i0 v$ R
- t.upload();/ \+ m/ l' m* a! Y( X
- let k = 0;
) m Z. K( a" { - let ti = Date.now();
' I( F8 d% h5 W8 B8 P5 v. \ - let rt = 0;
P( q# G# V5 X/ Q0 N9 ? - smooth = (k, v) => {// 平滑变化
; W0 v, g, u" }0 k1 P - if (v > k) return k;+ k3 _ J/ H% N, ?" R7 X7 U
- if (k < 0) return 0;* g( b$ t( O5 I- f5 Y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 S" ~2 ]! o& s2 j7 n+ d
- } D9 V/ @1 p, Z( z" K4 q
- run = () => {// 新线程
# D) m c% `- H$ J- B - let id = Thread.currentThread().getId();
) u8 ^2 P) i- ?8 m0 Z* E - print("Thread start:" + id);
! O8 H3 W2 m! H - while (state.running) {$ D. ]% c! E! [
- try {
: ]# C: b! e, [8 k/ H r6 s A - k += (Date.now() - ti) / 1000 * 0.2;8 f/ H3 Q. P" ^- }' J
- ti = Date.now();# |6 m) b6 P% D4 O/ E' W& K1 t
- if (k > 1.5) {
9 g8 n: h4 F1 M/ p - k = 0;
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- setComp(g, 1);
9 Y* u; Q0 j7 W& u - da(g);
[' l; C* v% w - let kk = smooth(1, k);//平滑切换透明度2 {+ D3 }0 N e" I
- setComp(g, kk);
9 U3 c5 ?7 R2 j. N7 T% V" t - db(g);
1 }) m9 d( }; E1 j( J. W - t.upload();3 g, `& K; [. r- v0 }% ]
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 {( _+ ?! X" z& T$ ]5 |+ Q - ctx.setDebugInfo("k", k);* f- P! n5 Q; Y4 s' i% e
- ctx.setDebugInfo("sm", kk);# ~ }% k" G8 d5 Q4 t u) \
- rt = Date.now() - ti;
- H- Y( k; o* R# F/ h - Thread.sleep(ck(rt - 1000 / fps));0 x7 l) M, ^( ]2 B; D
- ctx.setDebugInfo("error", 0)/ T8 U8 s8 h) N7 D& r0 E
- } catch (e) {7 o) B$ A1 V; {
- ctx.setDebugInfo("error", e);
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- }
( u( X3 {% u. ^& H) T& i1 M1 i - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
3 @! D3 _$ z0 E$ T - th.start();& X7 x) I% o7 e0 d
- }
9 E0 w' a7 a2 r# B0 E - 9 R' I9 W4 E5 a b& a0 D! w5 w ]
- function render(ctx, state, entity) {/ u0 u4 P1 g/ \. D3 U9 g
- state.f.tick();
, I3 _( n: H/ [( G8 u - }& I# [1 G, f) B% V! v5 Y2 @9 Z. ^
- & ?! L4 Q1 q: F/ y4 `
- function dispose(ctx, state, entity) {
- w* k, I' ` d) J' z5 G - print("Dispose");
% o1 V. z+ I* \7 | - state.running = false;
% k; m# w& W0 s; l0 t @ - state.f.close();5 O: i8 U0 ^0 v- K& o4 w: N
- }
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, U8 A! T0 o! k! R a) q( A- function setComp(g, value) {! q; {3 h6 W$ C! O. p6 d
- g.setComposite(AlphaComposite.SrcOver.derive(value));# `* [; U$ w. n* H) {0 x* v
- }
复制代码 + I) ~7 ?$ l: } ~9 T U7 g. H' U
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。
: d5 \$ Q- G' q: n# T1 v* G: \& D, z. C; n6 C
$ x8 h7 w9 y( }& b* i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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