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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。
& C2 Q9 J* e* U. B. T. _- importPackage (java.lang);# P- U8 O4 ?" A% t
- importPackage (java.awt);' A! ~9 Y2 O6 O7 O, N- |( Q
% U% ^) u) i# b$ N- include(Resources.id("mtrsteamloco:library/code/face.js"));( ~& L4 H( X; M% z D ]2 Q
- % H0 K& ]5 z7 ^/ l
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& G8 x; K$ {( j/ [
2 y$ g p) E a* Y" E4 W- function getW(str, font) {
2 o% J/ n) s' x4 p& N - let frc = Resources.getFontRenderContext();
6 p, V, ^* W1 { - bounds = font.getStringBounds(str, frc);
' ?! _9 g! M3 A% U: a4 T - return Math.ceil(bounds.getWidth()); a% n! N+ `# w2 W5 }. Z
- }8 g" P8 @0 s5 Q: J; o4 h* ~: u
& E% K2 C3 K9 Y) x1 c- da = (g) => {//底图绘制
" w' X2 _+ p( q5 i9 |) p - g.setColor(Color.BLACK);, {3 C7 `* J) o( f
- g.fillRect(0, 0, 400, 400);
' U1 d" j, U$ b6 E - }
# }& H [5 {$ p4 _0 _4 a( `: ?7 F
) c0 L a. v7 [' F- db = (g) => {//上层绘制
5 }, u# [3 D: x# `# D; F - g.setColor(Color.WHITE);; M4 R6 ^/ i3 m4 x
- g.fillRect(0, 0, 400, 400);" P7 c! ~- G4 x0 `- f
- g.setColor(Color.RED);
! J2 o) z+ z) M8 x9 _7 X - g.setFont(font0);' e+ H" Y5 J1 m6 I6 }9 y, J
- let str = "晴纱是男娘";6 W8 Q, F) r: M; J
- let ww = 400;
! t. a+ n: z* b! g( L$ [ - let w = getW(str, font0);, Q( ~+ z0 x; r% f% `
- g.drawString(str, ww / 2 - w / 2, 200);
2 f+ F& Q" h% w& l+ A; t - }
- D3 Q3 X6 }; D# C1 i$ a - ! A/ k- B- {, Y" {! I4 y
- const mat = new Matrices();
: m6 V5 U9 o/ s- ~% W4 F+ ~/ [ - mat.translate(0, 0.5, 0);
2 ~" N9 e' J: ^; G
& e% B+ L: H5 ^0 }4 u2 `1 g' B- function create(ctx, state, entity) {1 {6 C2 p$ r- |
- let info = {/ \, m& X6 v6 ~
- ctx: ctx,
; T( R8 s( |# Z$ J w - isTrain: false,$ V9 c8 | a9 U( I* @+ j9 |6 r
- matrices: [mat],' L. v+ l5 _8 [& H
- texture: [400, 400],
% X, B5 f! k# L: W - model: {
: J, H5 ^' \# u3 X7 h- F4 } - renderType: "light",
( u! O9 B) p) N N, k* T$ x7 X4 o6 F - size: [1, 1],8 y* X& t- C0 |; Z& i
- uvSize: [1, 1]% h, q2 z) D5 `+ X, y* [
- }9 e2 W0 `0 L8 v' S
- }
9 f2 s& r- u" F3 A$ T - let f = new Face(info);) B1 }0 W k/ L: L
- state.f = f;
! n) G! l7 L! ~( D - d; {/ j4 r% v8 C) o
- let t = f.texture;
5 \, I" `/ t' X' g - let g = t.graphics;4 X0 ^; `( ?+ Q" e
- state.running = true;) H. @/ ~9 J- a* {3 F
- let fps = 24;
" }6 D# M, A) l - da(g);//绘制底图
1 a5 V5 O. I0 d6 j- M$ H3 P - t.upload();
U% T, w" H! f - let k = 0;
* V6 e+ d" n" Z: Y: E5 @ - let ti = Date.now();
) V- H3 E, d" ~ - let rt = 0;
3 J5 E( p$ r/ b, }, n' c: b9 R - smooth = (k, v) => {// 平滑变化
* U$ ^ i4 C( @/ d( [$ J. X# e9 y - if (v > k) return k;8 z- `/ I. U2 a; t6 b
- if (k < 0) return 0;
9 P. ^) G9 A* F; T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! ~, |! K4 p6 b7 _4 p2 R; d - }2 m2 E9 ~9 u& |% @
- run = () => {// 新线程
3 z" `- n( G1 {$ W- m - let id = Thread.currentThread().getId(); z! y: Q f5 h# \
- print("Thread start:" + id);' _2 U6 X& k% N/ y- r( I6 U
- while (state.running) {, }/ p: Y, J' b% b
- try {
9 y9 q8 Z: s. P1 c6 b4 i - k += (Date.now() - ti) / 1000 * 0.2;! \0 r' B+ V4 ~7 [: @5 S
- ti = Date.now();, q6 q' [6 {; U) y) Q% v, U$ W
- if (k > 1.5) {
0 z) ?0 ^/ d, {* Q - k = 0;
$ Z8 p! Y, ]- a0 a; l# M - }
1 W4 O( Y' Q- P6 f3 U - setComp(g, 1);( `5 B3 M4 I, p/ s
- da(g);
/ t1 Y, L9 H$ O9 H( F2 U0 R% F - let kk = smooth(1, k);//平滑切换透明度
. n R2 a1 h4 N0 E- X2 D+ X - setComp(g, kk);
/ h8 v0 h; b ^) t; v - db(g);
3 U2 e$ o! P: e, C& ` - t.upload();6 s2 U* a* ^3 |; T1 y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! ~. b' q+ M4 b: {0 y/ k7 g. ` - ctx.setDebugInfo("k", k);
/ Q8 q0 R9 V7 w9 R L e - ctx.setDebugInfo("sm", kk);
( _/ u. Z L3 H M$ j - rt = Date.now() - ti;( U5 ^; r2 E/ E& d
- Thread.sleep(ck(rt - 1000 / fps));
/ b% [( a" \1 ~4 a; B. I1 `2 u, z - ctx.setDebugInfo("error", 0)( U* k& {) O: K3 q% K1 i
- } catch (e) {
r2 ]0 z* s _+ ^1 b - ctx.setDebugInfo("error", e);0 ~$ O" M- m1 O7 k( q( s2 u
- }( W) t+ f# T( u2 Q# d" B
- }
6 C( f% f, N$ |2 l) H: z+ T9 M: B - print("Thread end:" + id);
& D) n4 O6 ^, h( c2 g$ d4 C - }$ G5 S, G' b5 B- n
- let th = new Thread(run, "qiehuan");! t8 R0 x) q, u: ]4 }3 a# q" d
- th.start();
% f1 ?6 [$ @& f. } - }5 r' N8 z. h7 z5 z! l4 r0 D
- 3 Q) u. |/ b7 M8 t
- function render(ctx, state, entity) {6 ^9 n9 A2 n# F% U
- state.f.tick();, q0 H! f) c3 S4 {. ]
- }& N& o5 i, a+ ]; F# d5 S/ B
1 O% W( n( O) t0 O; c2 I- function dispose(ctx, state, entity) {0 p( z' k! U, r) c
- print("Dispose");5 _ ]# ` k6 M s4 z
- state.running = false;8 I: x" s' z6 _5 i q! |. h
- state.f.close();
1 m- \; n6 E9 p0 f+ j5 q - }. B2 r5 i0 |: L; v" ?4 ]7 I
- 2 L5 o# i& q y* \& E, z1 r2 L
- function setComp(g, value) {+ H" C7 J: C. p- \6 R1 G
- g.setComposite(AlphaComposite.SrcOver.derive(value));
' G: M: k) e) U/ @ - }
复制代码
: i, b b0 a# x1 w$ M. ~/ 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。( E! q- \9 o) s# t
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; b" p) t/ o- M顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ {2 R3 X" z8 i9 F# |
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