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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。0 _3 O4 |9 n" U3 H
- importPackage (java.lang);: L1 |$ \6 S; V) k
- importPackage (java.awt);
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# D( g) }7 O I/ c# v# O$ y! t- include(Resources.id("mtrsteamloco:library/code/face.js"));! F2 m" |2 o. ~6 W; F* A3 i
- + K# ^- W! C$ Q* C; R$ G* K3 C& k8 g
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);- M: [% q: N" \3 b' J
- 4 V r* j, m% I4 v) d ~
- function getW(str, font) {+ W: D ]$ B$ Q; q1 q6 C
- let frc = Resources.getFontRenderContext();
f# x8 Y4 y) n - bounds = font.getStringBounds(str, frc);
4 j+ c4 ~4 @. q4 G2 [3 U - return Math.ceil(bounds.getWidth());
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- : S; c2 ?5 R) W5 K1 u" a) |: E
- da = (g) => {//底图绘制
* O& }1 { w+ C( ^# c - g.setColor(Color.BLACK);( P: u) T9 T0 G+ s7 N- J, Y. ~7 \
- g.fillRect(0, 0, 400, 400);
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- 1 s# N, u! Q0 d
- db = (g) => {//上层绘制
0 q& O! K( }* l - g.setColor(Color.WHITE);; q q: j. v: E" X5 X$ _% w
- g.fillRect(0, 0, 400, 400);
/ B. ?. `+ V4 `( q( Y3 h" D: D' f- z" ^ - g.setColor(Color.RED);- ?+ ^ {0 F5 r9 R! w& R$ g
- g.setFont(font0);8 u! \# V z3 {) c* g1 @" k+ h
- let str = "晴纱是男娘";
# I! T; L5 G4 P7 ^9 i - let ww = 400;
' N, A; B" q* ~8 w - let w = getW(str, font0);
0 n- N8 a3 H" \6 F# m, v2 K) d7 R - g.drawString(str, ww / 2 - w / 2, 200);
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, B, V& d& \3 j7 l0 ~- const mat = new Matrices();
- s* w2 _; d& F! E9 b8 K0 Z - mat.translate(0, 0.5, 0);
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t5 P V; w5 v' q: l' c7 M- function create(ctx, state, entity) {
8 c0 p" M8 a+ F6 m. ?" c - let info = {
2 X7 s" V! B/ l; l! z* K k - ctx: ctx,
/ V6 i" H! t1 X - isTrain: false,
+ F7 ?6 x5 A. W9 Z8 q - matrices: [mat],9 G) j0 p* J9 k C c4 W
- texture: [400, 400],
6 |! n6 G! p9 u+ y | - model: {
% C! B5 r2 {9 f& M" Y1 D - renderType: "light",
) x+ O% \; K8 u - size: [1, 1],! [" l: b- }) m) D
- uvSize: [1, 1], ^2 @: a$ Y4 E3 ?* p* `
- }
9 L. J" b+ l' Z( q% b) L - }
3 u2 Y; n2 o& P3 A. a# B, Y1 M - let f = new Face(info);4 H) v; I; m j+ U3 y
- state.f = f;
! `! n6 c/ l3 A' I1 Y- B! d - u$ \6 Y: u# g/ x
- let t = f.texture;
$ T) n Q, M5 g8 \- a" [* g N' _ - let g = t.graphics;
; P9 R) _" k. e# B9 @ - state.running = true;) z1 h! l- J( B; S
- let fps = 24;
0 U& A+ {& p0 U! A7 D) o& F0 y - da(g);//绘制底图
* _3 ] O6 }/ f' a* X+ d, ^+ _" L - t.upload();( C' w1 y! e+ }& Q( a# T
- let k = 0;
7 u# h, E, V: H" K% o1 Q( M - let ti = Date.now();$ u3 g! j2 x: T, o, ^3 B$ f
- let rt = 0;
) b; y& c, b* P. H8 ] - smooth = (k, v) => {// 平滑变化
" K% h8 z! V, z0 G* L - if (v > k) return k;
v4 B* q) K% ^) U% _' e - if (k < 0) return 0;# X- ~+ M. {* J+ V
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 d. {& T! r `: r ?5 u- V, H5 B - }
! p" ~ `# d5 t; i/ f8 X - run = () => {// 新线程7 V7 W6 ~/ l9 K+ I9 } u
- let id = Thread.currentThread().getId();' u" L4 d% ]+ M- J, q; c& N
- print("Thread start:" + id);
! W0 v. _# p' h; y& Y* \; f9 E - while (state.running) {
/ h* U- ~' N' w0 \8 ]* |5 a - try {
% R T' j! K, B. e% Y9 } ~ - k += (Date.now() - ti) / 1000 * 0.2;
9 B- }( X' s! J- i8 D - ti = Date.now();, \1 S; D# F {" L5 W) p" t
- if (k > 1.5) {6 w) D1 D5 K. L+ ?
- k = 0;, q8 g$ A q. }1 e
- }
5 j0 Y; a; D) s7 o: \) e - setComp(g, 1);
9 ~+ O& w0 B2 T/ [ - da(g);
) [, P' A" J9 ~% N( Y - let kk = smooth(1, k);//平滑切换透明度
1 W2 T8 j [! X6 g3 S# L* Z - setComp(g, kk);2 g* }- g _; m# F7 W
- db(g);
& S4 q/ h1 K% L5 I7 b, D - t.upload();; ]5 t0 t0 X' b; \$ B3 V" Z5 C
- ctx.setDebugInfo("rt" ,Date.now() - ti); f0 l' T7 p9 L D' o9 f+ {) u
- ctx.setDebugInfo("k", k);9 d2 A& m. P* z# x, ]/ R2 \* X3 W' j$ {1 h
- ctx.setDebugInfo("sm", kk);6 C' k7 k# c- {/ H
- rt = Date.now() - ti;
6 r2 L5 {! c8 w; E. G - Thread.sleep(ck(rt - 1000 / fps));
8 x0 m$ |! @0 n: P3 _1 }* ?4 X" ^ - ctx.setDebugInfo("error", 0)2 q& o: e0 A! m+ b! I
- } catch (e) {, N, j1 b" m9 N( ]
- ctx.setDebugInfo("error", e);
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- }
( |; f. \3 f$ T/ a: T4 ?) M - print("Thread end:" + id);# |' ]( F/ V, ]! N; E8 e% c+ D
- }
+ L8 G5 b) c. C9 Q$ Z i$ W2 [ - let th = new Thread(run, "qiehuan");+ ?2 {9 ~0 J3 w: G/ N( }
- th.start();, m% T) G S% @, M7 s
- }
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" {) `/ N1 y. @' o5 u- function render(ctx, state, entity) {. v+ L; K$ O# H
- state.f.tick();$ ], ^" ^6 G/ M
- }6 I2 s7 H( U3 J
, u& v% q2 j8 H3 F% I# E9 X4 a3 B) d2 D- function dispose(ctx, state, entity) {
. @! V/ f+ a0 ? - print("Dispose"); g7 O# k1 S7 j- b3 G
- state.running = false;
: k! w. Q5 U; i - state.f.close();
* b9 T/ y5 V" B. m - }
" v! B% |9 w' V0 B% g. ]6 } - $ b. K4 F) k; }9 G
- function setComp(g, value) {+ d M6 W" K2 } t+ f
- g.setComposite(AlphaComposite.SrcOver.derive(value));
8 G) ^4 d/ N6 G9 X& Y3 H% z9 J. Q - }
复制代码
( Y3 k- y4 i( f) 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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 f2 \4 ]8 U1 Y2 o; W8 d( r. D
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