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' W) ~) X P0 E9 C& a7 C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。. C ?9 G3 q; a+ @9 v
- importPackage (java.lang);5 A3 b9 e1 C( ^5 E+ J4 _
- importPackage (java.awt);- M- I" f- j7 W- L+ r3 V# Y$ E
1 Y8 \4 m0 h3 m- W' \- include(Resources.id("mtrsteamloco:library/code/face.js"));
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. \3 O( w7 d7 }* U7 S3 g" o4 |- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 l% T! y! j) @# Z4 ~7 L( {
- 7 [* r; S$ R0 Q" U! r& R5 V8 C
- function getW(str, font) {
+ ]. C/ `) K: a1 I! c - let frc = Resources.getFontRenderContext();
; c" \& B* \; D7 O0 j2 `! {9 y - bounds = font.getStringBounds(str, frc);5 ]( \: a" m4 C
- return Math.ceil(bounds.getWidth());' V; D6 f: x5 p7 b
- }
6 _( r$ S7 R& }5 \ - 2 t8 w/ e3 X1 B
- da = (g) => {//底图绘制
4 d/ `" k. y# C! s5 @% ] - g.setColor(Color.BLACK);
g. e% M' z) U H9 u$ w$ Z - g.fillRect(0, 0, 400, 400);
* M" C/ |' M7 v' w* f8 w - }2 z9 p& I. N% R. _# J
3 I, ?7 z9 S. z- db = (g) => {//上层绘制
% f+ z) w! x7 r5 x6 u" R; \ - g.setColor(Color.WHITE);
! y+ G. a3 v" ?0 [ - g.fillRect(0, 0, 400, 400);& T$ u/ t2 s3 M1 i
- g.setColor(Color.RED);
( d, G2 R( ~) _" y$ L4 Q) J - g.setFont(font0);% u7 ~; M) Y1 ]
- let str = "晴纱是男娘";7 S6 k$ C z* _
- let ww = 400;
. X# f3 ]6 D+ e% {( c - let w = getW(str, font0);
) m w' {3 p$ L* m' W" h - g.drawString(str, ww / 2 - w / 2, 200);
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+ \4 s( b& h8 t6 S1 f0 y1 _- L& t- const mat = new Matrices();0 m0 G+ l' l# L T3 {2 S9 }4 X* u
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {! f' T1 H# I; c- u8 r3 _
- let info = {
. b( J1 a. ~8 U- X - ctx: ctx,
: X0 s( B+ ]/ ?( T4 e: a - isTrain: false,
% h X+ d9 q* Z" h R" n6 R7 } - matrices: [mat],. X# g J: r: [' S
- texture: [400, 400],/ z) A* ~8 h# k
- model: {+ [& h, e( N8 ?4 g
- renderType: "light",8 z' s( E8 u) w9 h# _- ~7 z
- size: [1, 1],
% v* d- _" o& ?. n& E0 b' l. w% a' d - uvSize: [1, 1]
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- }
; d" Z' D1 j8 @ - let f = new Face(info);
2 b& ^( h6 p: t7 m; V/ z - state.f = f;; j+ i7 I o% i) ]
- q+ b1 `* w i8 |# U
- let t = f.texture;: U8 p2 O3 Z7 d
- let g = t.graphics;0 ? S" }. G8 B. y$ W. a5 \
- state.running = true;( s' D& g1 `) u3 u0 Q
- let fps = 24;! t& h2 x. B6 p) p+ [5 N
- da(g);//绘制底图1 P( Y1 }8 ^ H* k$ v/ e1 a
- t.upload();
, }1 E. D* r+ T" k! M - let k = 0;
2 r) b* k! ~; V+ c# Y9 Y - let ti = Date.now();
7 I& v0 G6 U i2 C7 I) @! X - let rt = 0; h8 v) l- l# o& W- x* S6 Y. L
- smooth = (k, v) => {// 平滑变化
* A+ d1 u: ~7 p0 ? - if (v > k) return k;
4 }) r( w4 p7 m+ Q - if (k < 0) return 0;
* L0 T/ t4 z9 E0 x# [ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. s" E0 _5 ]% s4 k: _ x - }
1 H x U2 @: l; J, W- y - run = () => {// 新线程
# a( n. u) L$ r8 X/ P- ]7 T i7 g - let id = Thread.currentThread().getId();) E1 n4 M9 u0 q! G6 U
- print("Thread start:" + id);
& l2 S! b5 T1 _ - while (state.running) {. {6 b* b5 b* m, V
- try {+ b7 |2 a" ?5 g
- k += (Date.now() - ti) / 1000 * 0.2;: j/ h& J. o6 U' L
- ti = Date.now();
/ F& z: Y( o9 M$ b% X/ F3 a3 a) K - if (k > 1.5) {* Z, Y. q) Q. H6 ]3 Y! x
- k = 0; J t9 H5 j8 ~0 O# P, U( G
- }
% c* X4 d4 X$ |3 w - setComp(g, 1);+ [ ]& m: j# i8 O4 r3 o% `7 j
- da(g);
; ?# q! l0 l& {) J8 ^% t$ r - let kk = smooth(1, k);//平滑切换透明度; L! Z# t0 Z3 S& x6 i. ~3 @
- setComp(g, kk);
& v2 T4 T# f7 Q8 C - db(g); j: v9 B5 l" R+ R$ p8 K* ]
- t.upload();
3 }, l% @% t" c1 i! c8 U" v: B - ctx.setDebugInfo("rt" ,Date.now() - ti);
. }* P2 E0 o' P, e' R) a) n& S0 h% C - ctx.setDebugInfo("k", k);
6 A7 O2 i5 V% h3 X9 O2 y8 [ - ctx.setDebugInfo("sm", kk);
- I$ A! @ A: @) p: e4 g$ B. E - rt = Date.now() - ti;
7 t6 `8 Q2 G$ Y( v; Q* ` - Thread.sleep(ck(rt - 1000 / fps));
. h2 O" s5 O) i7 v5 q* ~$ Q4 h% S - ctx.setDebugInfo("error", 0)3 e$ [" S/ p& M1 R4 G
- } catch (e) {
& T1 p/ `. R7 _' M% A - ctx.setDebugInfo("error", e);" B8 m2 B6 E: C7 Z
- }; }6 q! N8 G3 K* u4 \. `
- } C! u1 E2 ^9 C/ |8 Q
- print("Thread end:" + id);
9 G, [; {" V6 [5 d4 T0 E2 A8 { - }0 B2 `4 Q( G: E0 U1 j; E7 I* Q6 \
- let th = new Thread(run, "qiehuan");/ s4 J i# [, O6 x
- th.start();$ r7 j- n% R* |2 A$ @+ ?' ~" |# L
- }, z. N+ A L5 E# Z% v' T$ R
# S9 O: q* ~) L) E0 f- function render(ctx, state, entity) {
$ L. T/ ~2 f3 Y: a& v- m - state.f.tick();4 e ^7 Q6 E! u, ]1 S
- }
0 ] e: N1 L+ C Q# z - , V+ z" ~1 o* X2 i* t
- function dispose(ctx, state, entity) {
! X0 O" b0 W) G' }3 s' R - print("Dispose");( G( [$ c; Z! B8 U2 K7 ~
- state.running = false;- [! K m- B( E" f
- state.f.close();5 J' {1 }$ M3 b' i; W: H1 T
- }
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, _( h! T3 \4 V- function setComp(g, value) {
8 I1 w' Q' h {# o2 [. M - g.setComposite(AlphaComposite.SrcOver.derive(value));
% W8 A8 Z( S) T' w" u i& G - }
复制代码
/ Y, y) ?% f1 I. O" e9 a) a G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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