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& J; c* Y. V$ u5 I% J: h# e( B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。
: i$ J% @8 L! l6 U- importPackage (java.lang);3 s! z$ D: M2 G1 W* x- x6 c
- importPackage (java.awt);
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( h/ ?# P# B6 Q* Y; @8 y- include(Resources.id("mtrsteamloco:library/code/face.js"));. ?2 r8 u' Y( k2 L4 D2 E1 H
/ B0 r; _( r) t j- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. b% b- G$ x3 z( }% {# C d; O* d
4 @& @9 m- O8 i- function getW(str, font) {2 o, i% G1 z1 }8 B- U! d" f+ c
- let frc = Resources.getFontRenderContext();
* T8 T* o, n5 v0 M; j - bounds = font.getStringBounds(str, frc);
4 H& f9 Z& e3 P0 X; B& M - return Math.ceil(bounds.getWidth());
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0 ^' j7 z5 M2 q, t! b j- da = (g) => {//底图绘制6 x1 @! T1 }2 w* t! t" z g
- g.setColor(Color.BLACK);
9 u7 S8 {/ v- A( n: \6 K. g - g.fillRect(0, 0, 400, 400);
( b1 K! H5 \2 k( u - }
* B4 n9 x: D; q4 ?7 F: ^+ s - 3 y4 @/ L- Y+ U' V# D- s, @/ ?
- db = (g) => {//上层绘制
, r0 o8 P& r! B- o5 m S - g.setColor(Color.WHITE);
1 U; I& d5 S5 E- m - g.fillRect(0, 0, 400, 400);
) t; F+ W z- h0 {6 D$ C: l: H6 E - g.setColor(Color.RED);* r# y- a' r& ~$ Q
- g.setFont(font0);
- V3 y/ y' u) c5 }* ?# I6 d - let str = "晴纱是男娘";
" v. ]- n% w$ L" ]7 O5 _ - let ww = 400;
$ i! P" T0 l, l - let w = getW(str, font0);
) r2 w4 T6 n7 L - g.drawString(str, ww / 2 - w / 2, 200);
0 R) l. L5 g+ o B - }
5 J; J9 n2 s! M+ O1 C/ q/ X
% r3 ?, I& f8 u5 u5 f- const mat = new Matrices();
/ B) a: w5 D5 ]4 c* D5 G% d - mat.translate(0, 0.5, 0);
- s1 u `; m& V4 u4 b( T - ! R% `! C9 j8 x0 s, u F
- function create(ctx, state, entity) {
4 z! z8 Y9 i2 Y3 B. f1 O" u' k - let info = {! w0 @3 m5 U7 s% G; ]1 d7 C+ j
- ctx: ctx,
) ?7 B; g* T/ v1 D& t) o) A+ x - isTrain: false,5 ^! }9 D6 p5 m" f
- matrices: [mat], p5 ~3 f3 A8 D9 E7 k0 Q$ r
- texture: [400, 400],
2 Z* p8 ? o( [5 l0 y) R4 } - model: {, I3 o: o7 U) r
- renderType: "light",9 J( U+ W' M* S: ?0 c& f* M
- size: [1, 1],) m2 c' H- [ O: \3 }6 w! i6 |
- uvSize: [1, 1]
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- }, X* C8 E8 ^8 D
- let f = new Face(info);
7 K" }% c: P% b4 Q# }7 }0 e: _ - state.f = f;
2 P( L5 {8 @8 t/ m2 Y
0 X0 p( O8 \1 e3 F- let t = f.texture;0 v: T$ P+ o7 r* O: U1 \
- let g = t.graphics;* s6 w# a! j( _! H j
- state.running = true;
2 i0 I0 C' K. D; t, |' E4 g - let fps = 24;
) e1 `0 _9 `$ a - da(g);//绘制底图
: w. d+ F3 L) D/ t" E - t.upload();
8 ]/ W W% g) m9 t" U - let k = 0;
/ }& [" l8 L2 ] - let ti = Date.now();$ Z. l/ ^7 P, O0 Q% P8 u2 G
- let rt = 0;
2 [" {, N: f e - smooth = (k, v) => {// 平滑变化
0 ^$ |) F- R6 P' L( F - if (v > k) return k;0 w ?) v9 x: A9 x# B9 D4 }/ z
- if (k < 0) return 0;0 [" Z% d1 M; T u( c) T& `
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' V6 Q2 N: M% D9 t: J
- }
& s: u; a" f* [: u2 L# \ - run = () => {// 新线程3 E6 g* h1 g2 _3 d0 z
- let id = Thread.currentThread().getId();( m, A2 _1 }8 x% c$ L! Z
- print("Thread start:" + id);
4 b' U( M% R4 j" f6 y7 Z* g0 b - while (state.running) {
A. z# I1 I- v4 T# y - try {
! E- J0 V! _) o5 B6 u1 w - k += (Date.now() - ti) / 1000 * 0.2;" e, Q1 `5 j0 ~9 C; j
- ti = Date.now();
: P6 _. x; `; A/ H/ P) R4 d - if (k > 1.5) {$ K9 N/ t3 O! B8 Z
- k = 0;0 y& K/ \* g: W
- }+ e( c* n# c) O/ \% [) n
- setComp(g, 1);
, ?/ l! j5 L; d: Q - da(g);5 R+ _* Y7 o7 O3 G; z2 k
- let kk = smooth(1, k);//平滑切换透明度, @4 t2 [9 h; h3 @% m
- setComp(g, kk);
6 U" Y2 x6 r+ J# Y3 b, Y7 s+ p5 C8 ? - db(g);1 E8 j. N4 B" z$ G
- t.upload();" D3 [2 e, H, X* n
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 x2 g/ M) r7 h& W
- ctx.setDebugInfo("k", k);9 x3 b0 _# A& k
- ctx.setDebugInfo("sm", kk);
( c5 K% s' [! n Z8 c. C# ]. O - rt = Date.now() - ti;
1 h2 \2 \# F; l' ? - Thread.sleep(ck(rt - 1000 / fps));- M) x9 M/ t6 A+ K% v6 X' C8 l& y
- ctx.setDebugInfo("error", 0)
) G! {: m+ C; `2 E- F8 m; G - } catch (e) {( ~7 J+ m3 o% X% F. }$ N; T( D- T
- ctx.setDebugInfo("error", e);' x S9 s$ |9 U4 P) v
- }
: a4 w5 M) I9 j) f# U3 n, E - }% _( g! b2 }; x F4 g; ^
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");8 Y* o& h( P/ P& E) ]2 Z& e* d
- th.start();# W5 f5 t5 F# F/ {
- }
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/ H' T# L+ h: c! w) D( P- function render(ctx, state, entity) {4 f) R/ i, l. @8 c+ L
- state.f.tick();
$ u0 V5 _8 _, c, N' z - }
, t; t! K- v9 Z" e' c - % N! E6 i: k& E2 A& u" D
- function dispose(ctx, state, entity) {
8 k4 r! i+ G6 k( v! d) R. o3 n - print("Dispose");
+ n$ Z. R2 ^. W) Y' W - state.running = false;: F! Z4 |6 u) W# p0 t# z* @- Y
- state.f.close();6 w' T, D! Q7 Z* O
- }
* N; x0 J S5 c& T* s7 g
& t& M. Q0 K* o- Z- function setComp(g, value) {
3 M" Q( \& a, t7 F3 O( ]5 m' M - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 l0 v1 S3 I4 T/ F9 N4 ] - }
复制代码 . f6 l- w2 d$ S8 v+ N2 p
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。) t. [0 e G A/ k! [8 s3 E) B& a
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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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