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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。
) [; ~, U* ]+ @1 j+ O# j' ]- importPackage (java.lang);4 \ g) B$ u& \
- importPackage (java.awt);
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! h' O( q7 M! [- include(Resources.id("mtrsteamloco:library/code/face.js"));1 |1 i& ^. ~6 [% o8 D. k0 \
0 o6 ~! E6 h/ N2 y/ }2 G" L- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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5 v9 o+ \6 z6 d' O8 [; g6 W. S- function getW(str, font) {5 w4 Z+ |( s* R% d5 h
- let frc = Resources.getFontRenderContext();
5 G' x3 p1 ^2 y. Q# Y9 | - bounds = font.getStringBounds(str, frc);$ g7 ?; S! [. W
- return Math.ceil(bounds.getWidth());* s' P) g" X5 ~/ }* v% }
- }
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9 i7 \6 p0 ~7 \: _ r- da = (g) => {//底图绘制
" k; ` N; H% d' [' t+ ] - g.setColor(Color.BLACK);' ?$ I4 k$ N# z5 K1 R1 @( P
- g.fillRect(0, 0, 400, 400);
6 U* W6 O8 q8 @) l - }
' Z/ O0 L+ w1 c' Y& n! n! ` - & o5 X2 v$ ]$ M& H
- db = (g) => {//上层绘制4 o+ T8 l T* K* S$ J
- g.setColor(Color.WHITE);
4 ~, H4 ^+ A+ J N% ?& ?6 F* a - g.fillRect(0, 0, 400, 400);/ t5 c) |7 [/ p7 G
- g.setColor(Color.RED);/ W. b* a) h; U8 R; }+ H, x
- g.setFont(font0);; t7 X) N" {% m' N1 V. v% Z% @1 y
- let str = "晴纱是男娘";' l( d' U- u4 @" E1 \. {4 n
- let ww = 400;, P2 g5 ?. U" w- Y n1 U! q2 s
- let w = getW(str, font0);
% W7 g8 M/ ^4 S7 b5 g9 i - g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();
$ D u2 W1 Z! A - mat.translate(0, 0.5, 0);1 _% a) i5 D$ v8 L7 \
- 3 V9 o# l& S4 L( Q3 `( i6 I
- function create(ctx, state, entity) {
% B' Y0 K9 A& e/ q+ R - let info = {
8 _3 n$ h$ ?4 J! U2 J3 f, v - ctx: ctx,7 f3 u& C1 T" m0 j B8 x/ d
- isTrain: false,# n$ |- q3 a0 i* Z! M0 d" D
- matrices: [mat],6 X8 a: C. |! k' {; N- P; B
- texture: [400, 400], B/ s9 w6 f! y5 w1 l
- model: {; O4 s' d2 f7 S: {" ~3 v5 u
- renderType: "light",
$ H" z7 Q5 M: {7 R; K - size: [1, 1],
% u5 i4 c1 ?2 h2 I3 |" _. p - uvSize: [1, 1]
- N: f3 L$ ^: ?8 ~: z8 M - }
) P$ q1 W1 j) \. _( ^& U F7 v - }
, I8 B/ `* N; X; H: a. M4 n - let f = new Face(info);
, e( V0 ?" \5 V/ @+ E, J - state.f = f;
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" D# H6 {/ k8 Z* Y0 a0 i9 K9 y- let t = f.texture;7 p: J, E1 @: s* n
- let g = t.graphics;4 m+ a2 R2 o. I% O
- state.running = true;/ [& `) B+ a- ?
- let fps = 24;
7 y& ?# b1 j5 Z; h - da(g);//绘制底图
% R6 b1 K o2 L, T9 A - t.upload();! \ r% c# Q _
- let k = 0;
# i: h1 b* m% _: k j9 v: f - let ti = Date.now();
* H/ I9 a; o! u% f+ g& G - let rt = 0;
& v: ` @9 u9 Q' N% x) r - smooth = (k, v) => {// 平滑变化, q, S: p* F$ F' D5 `- k# _
- if (v > k) return k;
& V+ }/ l. c& l* B - if (k < 0) return 0;
0 ^* B7 p; S( l7 T" }% p1 O6 } - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" Z4 [; A& G) F8 f1 U. B# \8 [ - }
; w- [5 ]! H8 g' O7 W - run = () => {// 新线程/ s2 y8 O* e+ @7 g6 B5 E4 H3 j
- let id = Thread.currentThread().getId();) |( Z3 n2 {0 C7 i
- print("Thread start:" + id);
2 j: ~8 `* S4 V N& a5 T2 e0 A" U: ~' z - while (state.running) {
( ^0 `' U, L# L" { - try {; d/ d+ n4 `! N& R
- k += (Date.now() - ti) / 1000 * 0.2;, @! e7 c5 l d; O% x1 d5 A; b
- ti = Date.now();# R* t( ^) ]$ A
- if (k > 1.5) {8 x7 P) g4 Q2 G4 f
- k = 0;
1 D# o+ v. Q6 g9 o! T7 N: ] - }
9 R" {0 p. D: h0 D; J - setComp(g, 1);6 [; O% _5 s8 B
- da(g);
* a4 J% o- J! | - let kk = smooth(1, k);//平滑切换透明度- w# t8 K4 _. _! m8 G& Z
- setComp(g, kk);1 {( M( X5 o- u3 D3 K
- db(g);! s/ g9 F3 Y- P7 I' d1 [/ b
- t.upload();3 d& T* a" Y# g0 N7 u
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 F7 Z4 P. B- R' A; V) z - ctx.setDebugInfo("k", k);
/ {6 q; ^. b7 i8 u) ^5 ~( C - ctx.setDebugInfo("sm", kk);" R& R p$ o/ h" f0 v* l/ i
- rt = Date.now() - ti;
- v" l3 e9 @# l" h# d - Thread.sleep(ck(rt - 1000 / fps));4 v/ F4 V/ _; ]/ m
- ctx.setDebugInfo("error", 0)* S, B) w& M8 K6 S0 K) s
- } catch (e) {- d5 }. N+ j+ z# O/ N% Z5 ^; H
- ctx.setDebugInfo("error", e);
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- }3 k9 D2 H" _ L' r' N: E2 M1 p
- print("Thread end:" + id);
9 v7 }0 r3 @5 A5 H: ?% Y A - }
* k& d- a' j+ h% S; N* Q6 G' H8 r - let th = new Thread(run, "qiehuan");
6 l& k6 T) L3 j3 j, n# G - th.start();
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7 a, d2 s8 A) @# z/ R- ~4 d- function render(ctx, state, entity) {
p w/ f# T& Y - state.f.tick();
6 a7 P% i h+ d9 z2 Q) { - }
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- function dispose(ctx, state, entity) {+ l K3 S; g$ w' H
- print("Dispose");
) i' Q# K4 c J; D Z - state.running = false;
# w) y; i3 Y& D/ I3 T8 W - state.f.close();
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- . d; R. c% `" s3 [/ V4 p% z _
- function setComp(g, value) {
; Z$ i$ ~( L' _% Z - g.setComposite(AlphaComposite.SrcOver.derive(value));
% c7 a, v4 s) S4 U$ V& h - }
复制代码 " U( e& _6 y7 P# L: G% m
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。2 {6 F% d$ \/ X
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- \1 \6 j) U0 C; U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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