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3 G9 ?. f( N8 b3 E& k+ M+ I- ]8 w! `' T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。
8 e. @+ v+ [) _2 F- H- importPackage (java.lang);
" K s; e- s) a& X4 B: n - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
; }8 u6 Y% a2 x; l7 @ - ! u! u$ ]- }: A' N- c
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* u6 D7 H" L% o. A9 G$ G - - T$ w" F& S6 {) R% S5 W+ B
- function getW(str, font) {# T4 H9 P% P& e/ f: E8 v# f
- let frc = Resources.getFontRenderContext(); \; y2 }3 g- y- A/ r' {
- bounds = font.getStringBounds(str, frc);- r/ _3 }8 p0 p$ }6 m# R
- return Math.ceil(bounds.getWidth());
: c" P: m5 Z* T - }
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6 v |1 Z; a* \3 h, |- da = (g) => {//底图绘制, s, i! P5 |) M/ G( l5 k* {7 q
- g.setColor(Color.BLACK);
9 }4 G( }. i: g - g.fillRect(0, 0, 400, 400);
1 r0 E3 ]5 W. O/ [) S. t - }
1 U8 y2 n6 u0 @; F1 ]" a
_1 {( P7 ~& D- db = (g) => {//上层绘制
" Z* b- {4 Z# x, x' z! G$ \( J - g.setColor(Color.WHITE);
6 r7 a# X+ ~$ ~( f+ c* I1 i - g.fillRect(0, 0, 400, 400);
6 {- H C; N) a8 V, R- E8 p1 y - g.setColor(Color.RED);, ?' q+ K, y$ s, L* V# \
- g.setFont(font0);/ y! p: o) u. ~: r* {
- let str = "晴纱是男娘";! e6 d- M1 n; k% v3 M- Y
- let ww = 400;
' h o1 n# m- _& v - let w = getW(str, font0);0 e7 g ] v; X7 W6 y0 X
- g.drawString(str, ww / 2 - w / 2, 200);2 d1 A. i9 T7 y3 {9 i4 k( r3 h
- }3 _# F6 |2 ~+ @) i
6 X8 X) K! ]! g7 ~; J) Z8 n- const mat = new Matrices();
) d: X% M% V0 p9 ?% S, m' _ b5 y - mat.translate(0, 0.5, 0); M4 D9 R7 E0 t6 ^9 R
f% s0 c" }) a# A/ |- function create(ctx, state, entity) {
: ]4 f+ Y% I* J8 {/ y3 h" h9 | - let info = {* w1 G, @0 {: v$ z. p" ]) }" B0 H
- ctx: ctx,
) E! R$ C) O& B, ]6 K6 ` - isTrain: false,! r7 k) @5 }7 n& C
- matrices: [mat],
9 {8 I* _8 b W/ i3 q - texture: [400, 400],
# o# J* `* ~2 ^2 v- C - model: {* ` i2 E) n( D9 b( a
- renderType: "light",6 R: }) t& |+ ], b1 \) X" I
- size: [1, 1],
, T2 T7 M' K( v1 H# T% t7 b8 D - uvSize: [1, 1]$ q, ]( X/ ], M$ l# s, O
- }
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- let f = new Face(info);
0 u5 f5 @ x7 _0 I8 T* |& n - state.f = f;8 @, R7 e. I" e7 n3 w4 B
- % c' `: J, D$ B! g
- let t = f.texture;9 q+ w( d) T; }: M9 R5 [
- let g = t.graphics;
/ U! o/ B5 @% }0 [ - state.running = true;' O- F" T7 F" Q2 y4 D+ L& j
- let fps = 24;5 I5 m, g6 Z0 S
- da(g);//绘制底图
: i x" g: A6 S' }- G - t.upload();
) f# |0 r' \1 u% k2 r; S - let k = 0;
( y: \2 ^) d0 U( y# f" v* G; f - let ti = Date.now();4 ~% y" I- k x! n0 W( I! @ V% u
- let rt = 0;5 e# x( F8 I4 a2 L. B3 l% I2 o
- smooth = (k, v) => {// 平滑变化, F9 h2 m6 I: v% M2 e+ ]
- if (v > k) return k;( r% [' z, s: O' M4 X% A) u
- if (k < 0) return 0;- G# ?: M& f0 @6 S( q: T, X, C! T
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# @* ^% c% Y1 V( j" b0 R. q - }
6 B) D3 ^+ a6 [) i - run = () => {// 新线程
0 y+ v$ ~3 ^) L9 n - let id = Thread.currentThread().getId();$ u5 e: x& I+ R( ]9 [# ~( h
- print("Thread start:" + id);; |% @: d0 j$ o6 P, n9 w& E
- while (state.running) {
+ H1 E4 g5 f; O6 k& H" @ - try {1 ]6 U; Z2 x- J+ S; [6 t
- k += (Date.now() - ti) / 1000 * 0.2;
2 i7 V6 A d- O+ ] ^3 J' r - ti = Date.now();
: }1 ^1 [. `4 F4 i {5 @+ u - if (k > 1.5) {# ^4 d6 K- N+ w. R# ^
- k = 0;1 v$ E" k# o& }
- }! R7 v; Y7 x, l# c6 q, f8 }; m+ T
- setComp(g, 1);
. J3 n G7 J4 l! b/ P# S - da(g);
2 H" ~0 |/ D4 }& w) i% h4 ]: ~7 B - let kk = smooth(1, k);//平滑切换透明度
/ m& o( c1 z& @ - setComp(g, kk);
0 n Q; l, \, Q Z. M - db(g);
' Q5 E) f4 J( z - t.upload();
4 N9 [- X2 ` G( c+ A% p - ctx.setDebugInfo("rt" ,Date.now() - ti);* _: Q$ v3 Y2 J$ b3 V7 v! k) W+ X" Q
- ctx.setDebugInfo("k", k);
$ y& z" Y* r% T2 l9 |' t - ctx.setDebugInfo("sm", kk);6 X0 ~. x, Z6 h4 Z9 f
- rt = Date.now() - ti; L) k5 t ?4 F# L4 x+ T6 f* k4 S
- Thread.sleep(ck(rt - 1000 / fps));
j4 I' x& c2 ~! {' D; J- o - ctx.setDebugInfo("error", 0)
! R6 A% N+ j3 n. [ - } catch (e) {
0 Z: b6 R( c* o+ a9 l9 l - ctx.setDebugInfo("error", e);0 F" {2 N' D) f5 |+ h3 k
- }* W, E. ?) D/ w- z* h% w1 C( ?
- } I* G. b* w8 y- r6 Q
- print("Thread end:" + id);3 I. L9 L( z, e; e
- }& h1 E. r! P+ V! H) a
- let th = new Thread(run, "qiehuan");
( x# O, N' w$ F" r* q$ r - th.start();
0 i6 ~& A0 C! _3 w6 u - }5 Q! P' O# U9 g, p6 s
2 a+ W( }. W$ q) l9 a* h% ^) ^/ F- function render(ctx, state, entity) {7 p7 u; U- H# X6 l0 X+ p
- state.f.tick();
" _4 H O7 X: b. C n - }1 n& l/ Q# t% w3 ~% I
- ! X6 \+ p. d: B5 e
- function dispose(ctx, state, entity) {4 t }9 m; x9 @
- print("Dispose");
2 Y5 B3 [& N/ m. [& \ q( ^ - state.running = false;7 B& I' n) _4 J7 C
- state.f.close();
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6 V& [- ]! _ `6 p- function setComp(g, value) {
- b/ \# I3 T v* a5 `/ ~1 J4 c; p4 f - g.setComposite(AlphaComposite.SrcOver.derive(value));& B" f" M+ l ^$ B& m5 L% x/ ]
- }
复制代码
* W( L' f' r. F( i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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3 p* B- [3 g4 K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 X7 O9 t' W" b
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