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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。
" V% b: ^; X; _9 ~2 p* ?- importPackage (java.lang);
& a& K- [1 v) i3 z& l7 o: { - importPackage (java.awt);( Q( @0 z5 i3 D$ x2 a
- 9 G# W s% B* N
- include(Resources.id("mtrsteamloco:library/code/face.js"));% e, i! O) R- z, \% M' E, [
' W8 _" V. M' O' e* l" ~- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
4 o; K5 T4 L0 } w - ! H/ I/ z2 U: B! I5 ?# w: r& Q5 d+ l
- function getW(str, font) {
( H ?; ~. [) l" p0 D8 q6 |; r5 V - let frc = Resources.getFontRenderContext();
( n# D+ f4 I/ B$ x9 s. C - bounds = font.getStringBounds(str, frc);+ M( \) t/ s4 H* C2 ^
- return Math.ceil(bounds.getWidth());
6 a b+ ?& g* A# q0 f8 H - }
# L3 G3 k. k6 u0 @1 n
- y/ M5 ?3 y3 c* u9 U' P, H- da = (g) => {//底图绘制
* w9 q9 q3 \7 I+ {) S - g.setColor(Color.BLACK);
( T8 z' V: K% }( ^& ?' ^8 k- K - g.fillRect(0, 0, 400, 400);4 _ S* T' Q% H
- }9 }6 q$ {6 v% v" f4 t6 `! |
( i( ?& |: c, z# e% e- W- db = (g) => {//上层绘制# T" S" u! `2 E6 M0 K: d" R- ]
- g.setColor(Color.WHITE);
* O# n5 `) T! |8 D5 M% j* Q3 x( W$ y( F - g.fillRect(0, 0, 400, 400);
3 A e1 e/ ~9 O2 p - g.setColor(Color.RED);
% k% O- H5 C: k+ c - g.setFont(font0);- G. r6 S, Z9 j2 c2 V! L+ @
- let str = "晴纱是男娘";1 Q8 j& m8 Q9 @! ~- q6 ~
- let ww = 400;
. E' N' Q* m. |9 f7 ?5 o+ |+ a - let w = getW(str, font0);0 j I3 t4 i3 r A: L
- g.drawString(str, ww / 2 - w / 2, 200);5 x$ ~- ^# p" @
- }
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9 u7 Y" I: K' [- const mat = new Matrices();" C1 H) p( u7 P* h8 G3 v
- mat.translate(0, 0.5, 0);
* ~7 Z H w' K: \
0 T& p( r5 ]0 E& H( H- function create(ctx, state, entity) {
6 D7 U2 T y+ y c* w' R - let info = {
( e7 t7 k+ f9 |7 g q# _ - ctx: ctx,9 D3 G2 u5 I) G* p- O
- isTrain: false,$ E& g+ U4 k- j0 j c* M+ J
- matrices: [mat],
$ p2 s/ |( a8 X$ d9 z - texture: [400, 400],
. H% W( F [5 m - model: {
( m g$ F$ ~3 A3 f$ r8 D - renderType: "light",0 N: E8 R) [+ U" ]1 `5 C
- size: [1, 1],
1 `* j' v j. t - uvSize: [1, 1]: h) e7 g6 |8 ?0 e' O
- }
; A% h: Q7 ]' {' C) Q4 O; i - }
/ Y8 K+ k6 [8 _2 l3 A - let f = new Face(info);8 c3 k$ H; v9 }
- state.f = f; H0 W6 K" l+ Z7 y
5 g* z$ x/ D; u. s2 ]$ [# }- let t = f.texture; }. v% W2 {# b$ |/ l* d7 x
- let g = t.graphics;
8 x) V7 O' H# R' s$ J5 F - state.running = true;9 d: l( \* Z6 t- ^
- let fps = 24;: z' N' `4 k. D( T, u' D/ o; f
- da(g);//绘制底图
/ I+ H; J7 U* p$ }& k - t.upload();3 M/ j3 Q: W2 P) U" @# O
- let k = 0;
# I" L0 W0 J3 M. }% t! u - let ti = Date.now();; r4 q9 s: Z4 Y3 l& @6 F0 }
- let rt = 0;
6 x$ C3 k8 c7 ]) J. i- f3 z7 w - smooth = (k, v) => {// 平滑变化3 s3 s6 m) l0 Z& ? \+ H7 O
- if (v > k) return k;3 |* j& x' J& L- p2 D) v3 e- E; Z
- if (k < 0) return 0;* n; g) }: \; `( M& s3 G, w0 n d% y: G
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: x5 x8 V) B t# `2 k: z - }
9 M$ v, O1 u" R! l) N - run = () => {// 新线程
6 N3 A+ i" d. }5 `1 _7 f - let id = Thread.currentThread().getId();3 o- ~1 M" ]2 Y5 A8 j2 q: X( v
- print("Thread start:" + id);9 _5 X; a# j: t0 O. |/ y! f4 g
- while (state.running) {
, L* T4 V! q9 c/ g6 u( Y% L X+ C7 C- n - try {/ P. l, p6 H* U6 H9 V/ B3 P
- k += (Date.now() - ti) / 1000 * 0.2;+ |; |1 j; ~$ A9 K% W7 v# U1 I
- ti = Date.now();+ Q& p1 p2 ?& {2 O6 E. q: H' |5 P1 A
- if (k > 1.5) {
' t: h/ l6 Z5 x! ] - k = 0;5 o0 k- z$ z+ `
- }0 a$ z" m8 y J3 E2 \ @6 h
- setComp(g, 1);
/ l! s w3 p7 [ - da(g);
7 y3 ^1 u# W" m6 K" _ - let kk = smooth(1, k);//平滑切换透明度
1 v7 ~$ z* p/ c6 l - setComp(g, kk);+ p, h; c, ^2 [) `5 D
- db(g);
+ _2 | {- f' t% g* J( l' n- D! S- G - t.upload();
1 m+ ]7 S. V, c8 ]4 K0 s. } - ctx.setDebugInfo("rt" ,Date.now() - ti);
( {+ A# B1 W9 ~; C1 p0 c& O) e - ctx.setDebugInfo("k", k);
0 ], A) ]/ k6 g( T6 Z' h8 Y5 W - ctx.setDebugInfo("sm", kk);
$ Z; v; ~2 k* U: S - rt = Date.now() - ti;
( P2 x2 i4 e; y5 E- | - Thread.sleep(ck(rt - 1000 / fps));* D- h- P K) T9 u6 M5 }
- ctx.setDebugInfo("error", 0)
m1 n. Q2 A/ v" }. d, C! ^ - } catch (e) {
4 `2 M& h4 [- V& Q0 A' ~# h - ctx.setDebugInfo("error", e);
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- }* p% H; f3 G: }& \: L* v! \- ^
- print("Thread end:" + id);
4 E# b: x; c1 l - }
, D# s7 F9 [5 R6 x - let th = new Thread(run, "qiehuan");
5 r" ^$ r2 t2 D& {+ S; Y. @& n' N - th.start();
2 k4 h0 | T4 P8 x2 a* V6 c1 C - }
+ K% Q) d+ G7 K; ^4 O; G3 @ - ( j3 M% L4 c% e# Q. A5 r8 G2 m
- function render(ctx, state, entity) {
& C8 v, l3 U' ~ - state.f.tick();( j$ _! R, R* {; K. E* V3 w
- }# p% C$ q2 P# P, V$ Q0 b' b
, G$ A' e1 o, {! J- function dispose(ctx, state, entity) {! G- g0 V; t: M6 z' f6 j* h+ [
- print("Dispose");4 t J3 Z& S$ S5 m* p
- state.running = false;
F/ _$ ]$ [) w' o - state.f.close();% G& o. x6 m- v1 T6 l( G$ ?
- }0 L$ X) H1 j" S
0 e" }, m2 E! c/ b: k- function setComp(g, value) {
! Q) l% @+ D& C$ o! } - g.setComposite(AlphaComposite.SrcOver.derive(value));# x0 P- o1 M+ \
- }
复制代码 & B8 U2 m# ^6 w$ Q2 h
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)
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