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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。4 x5 O' M0 h, t, f/ e( ?
- importPackage (java.lang);& l. m- T) \7 S5 P! M6 B7 S
- importPackage (java.awt);) ~; {* E8 }1 v- L, E1 V+ f
- z( h; t( k' `/ l) f
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 P, \/ e. e8 ~0 {9 l
- 5 ^% k6 n, O: M
- function getW(str, font) {
6 b- r$ w5 t6 N" R4 w/ w - let frc = Resources.getFontRenderContext();/ ]* Q, V& ^; I9 C" z
- bounds = font.getStringBounds(str, frc);
' ?& ^7 C8 d1 F/ F - return Math.ceil(bounds.getWidth());
4 K1 [! m4 M/ A8 l - }
2 P- \9 L+ N3 l3 ]/ P5 I
8 d1 h) I( i" Z$ f- da = (g) => {//底图绘制
. q: U: ` P0 J1 g8 u5 J0 y3 a - g.setColor(Color.BLACK);7 _% {6 w9 D0 ]) b1 E% F
- g.fillRect(0, 0, 400, 400);) |/ R' H; W/ f" X n+ t% @1 R
- }; _1 t1 @. t6 q+ l4 }; h
+ i0 C: Q! i( b. [ G$ e. J- db = (g) => {//上层绘制5 x+ b+ m$ u* t6 ?9 e; g7 ~
- g.setColor(Color.WHITE);
% W3 v# y0 {6 C5 s7 X( i - g.fillRect(0, 0, 400, 400);
2 f4 S/ n2 G( T; R3 f8 J3 c - g.setColor(Color.RED);6 l; T U1 c6 P2 @( [9 L. V% L1 m7 g3 S
- g.setFont(font0);6 W) }) X, M2 [/ d5 b1 {0 b
- let str = "晴纱是男娘";3 M+ E: f# d6 \9 k
- let ww = 400;
& g* G% I. r+ v8 P/ a p - let w = getW(str, font0);
; g! d; \: R7 ]/ Z - g.drawString(str, ww / 2 - w / 2, 200);$ m; K/ p" a- u' _
- }
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- const mat = new Matrices();
8 e7 r/ e% D! ]" \; s - mat.translate(0, 0.5, 0);3 n h* ^% M4 a3 h, x
; J( x- |. q" g/ K; i- function create(ctx, state, entity) {
# a1 h" O0 W! X3 f) Y2 F - let info = {' u1 j. L) V4 @. x5 t
- ctx: ctx,! c h! [1 ]& Y1 j* M; p
- isTrain: false,
) s& q2 [. V+ P) ^8 ?* ?4 m9 ` - matrices: [mat],
( q% u: g0 A4 x0 x! d - texture: [400, 400],* W) k7 w5 N7 q+ Q5 m' J
- model: {% Y9 J4 C; |7 ]1 P! X, g* O
- renderType: "light",6 e1 K7 E' f% d
- size: [1, 1],
# {6 S% X8 A9 N: Y2 _5 o - uvSize: [1, 1]
8 K8 {( X! o5 i. \- ^: ~9 e" |$ S - }
: g( m& R7 P) R" G7 k' \, T: ^ - }
& T9 J: }! e& O3 u - let f = new Face(info);/ H0 G! }; f7 e
- state.f = f;
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- H: @, @, [7 `9 w$ J6 r I; K- let t = f.texture;
* F( m2 n, `9 G5 U/ z6 \% ? m( w - let g = t.graphics;
1 |% y+ `4 R: G+ X - state.running = true;1 M) Z7 _2 h1 ^6 A( `0 Y
- let fps = 24;
) n( U3 [, O' C, E' F g, i - da(g);//绘制底图
% _9 G: x3 F/ ]% x" M - t.upload();
3 ^3 |! X) f" z& R/ M - let k = 0;) e7 j4 E1 {" Q2 s T* w5 |/ w
- let ti = Date.now();
* A' Q8 X& q# E* R - let rt = 0;
. ~6 H4 ?: l' E$ G% B5 O - smooth = (k, v) => {// 平滑变化
N6 n. l' j' h7 n - if (v > k) return k;2 B) D& M( g) {% B5 W4 r5 [
- if (k < 0) return 0;- ^# ?7 l5 @% m. [
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 }9 K4 O* e8 |& }& n3 G$ X4 f5 W+ P
- }
3 T! E( U/ K' h) e - run = () => {// 新线程+ F1 w/ z" g5 O7 l3 ?1 i/ i
- let id = Thread.currentThread().getId();
- |% d- q6 [. Y: W - print("Thread start:" + id);
" c% w7 ?) l, }6 i& i1 ~ - while (state.running) {4 `! I# a/ D7 i# ?) k/ T* P
- try {
5 i7 A% L, o8 @; L0 t; I - k += (Date.now() - ti) / 1000 * 0.2;7 a* _8 n) L8 o$ R5 [5 e
- ti = Date.now();
9 p/ Y% ?2 X' o - if (k > 1.5) {3 h) M, n6 {; Q& e; L
- k = 0;
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- setComp(g, 1);
) Y$ E- d5 `6 _0 G F5 g - da(g);
# S6 F) C0 H) U9 s1 O: D6 q6 w - let kk = smooth(1, k);//平滑切换透明度% s5 a/ j1 r+ v0 ^$ c6 w) V
- setComp(g, kk);( K3 L0 G1 d2 _% {
- db(g);
0 z5 `* Z! }0 @( l# f" c! j! Z. a. H - t.upload();
1 b; @& a- a* r q0 U - ctx.setDebugInfo("rt" ,Date.now() - ti);
! [/ m% ~: U( V# x* i6 Y4 b4 p - ctx.setDebugInfo("k", k);1 J) O. j& T8 R
- ctx.setDebugInfo("sm", kk);
& B# f' n) f, \' V- L+ ^ - rt = Date.now() - ti;. }! C* m i7 D4 S
- Thread.sleep(ck(rt - 1000 / fps));
# H& ?# S* f( M B' ^( K7 ` m, ~* s" L - ctx.setDebugInfo("error", 0)( w8 j3 J, t9 @0 R% g
- } catch (e) {* f8 O' T$ Q6 u
- ctx.setDebugInfo("error", e);# k# d9 r) B! g6 Q0 O2 Y6 z
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");8 y! T% X& c$ Z& f
- th.start();
& y: m; y0 @( d5 v8 y1 K - }1 B6 i) W7 q7 }
t- W3 E* e' Y* G- function render(ctx, state, entity) {" i x: e) D/ a2 Y* e
- state.f.tick();# Z7 D% k$ R* U4 u; z
- }7 N( m! `: S. u. J
" P5 W8 e8 ~1 y2 D" ?, m- function dispose(ctx, state, entity) { N1 T2 t) ?* v7 y1 ?- c; [+ |/ s% b
- print("Dispose");
) u) _" f; p# m- J - state.running = false;
5 o/ g% O/ T" i) [/ ^ - state.f.close();1 `0 W& C9 o, n2 x6 a% N9 w
- }
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- function setComp(g, value) {3 O* E) e2 d& x4 J
- g.setComposite(AlphaComposite.SrcOver.derive(value));
& {( D: i6 Z% r: n2 R: i7 j& c - }
复制代码 " ]2 P' L7 a0 \! ^* J
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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