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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。
1 E3 E1 S5 A2 Y$ V7 _7 a" H A ]% N- importPackage (java.lang);$ i) f8 ^4 ]3 z. B+ h( r
- importPackage (java.awt);
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, a! G9 x; ]" c, R- include(Resources.id("mtrsteamloco:library/code/face.js"));
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( R$ C; |/ S+ j: z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ h# Z, d( e6 E7 I! @ {! T8 F
" E% d; v5 Q. I8 T- function getW(str, font) {# `, |9 x. [: H0 D K0 w; M7 L
- let frc = Resources.getFontRenderContext();0 h/ C7 X: f/ }7 ?
- bounds = font.getStringBounds(str, frc);
4 F/ E1 ~6 ~6 s" ~4 l" t% e% A - return Math.ceil(bounds.getWidth());$ J& _! E8 H4 ~
- }
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- da = (g) => {//底图绘制
! s# O9 }( U& w7 G - g.setColor(Color.BLACK);9 _( U( n! k+ o9 g+ F/ b* m
- g.fillRect(0, 0, 400, 400);
* s Z+ u4 K; c0 P7 g - }
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5 {& m+ l( j- v9 K; ~( I& q9 x- db = (g) => {//上层绘制" p0 Y! k0 E! {7 ]
- g.setColor(Color.WHITE);; _& C4 I$ r! c- {' r
- g.fillRect(0, 0, 400, 400);& X$ z/ W6 T$ M( A& \. u
- g.setColor(Color.RED);
- q$ J, a- ^9 B - g.setFont(font0);
; u6 g b% T( ?1 V5 l) _/ b - let str = "晴纱是男娘";
! X7 }( b# q# O) s' E! h - let ww = 400;
8 C* i) ]5 _3 @0 P: G( g+ h - let w = getW(str, font0); Q0 a* y! i" k3 _- S5 F) J7 U
- g.drawString(str, ww / 2 - w / 2, 200);
: E% m! N' X. Q* I/ i - }
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- const mat = new Matrices();
: U7 |- F9 _2 Z9 q9 H5 X1 n - mat.translate(0, 0.5, 0);; c; L, h! w7 p4 g
- : P5 B1 `- x# v' X
- function create(ctx, state, entity) {1 S: `1 ^3 J' C2 j
- let info = {+ t0 S" S$ A; S3 H. p$ W5 ?
- ctx: ctx,
6 W# I+ g& v" l, u - isTrain: false,
# w1 q: B! B- P0 B# g2 A& u5 U0 f; d - matrices: [mat],
+ d2 G3 _' i0 y/ g7 @. j - texture: [400, 400],. d8 d/ ]$ z7 v
- model: {: }! X/ T& o. {, T
- renderType: "light",% |, {3 `- x9 i
- size: [1, 1],. J+ w% q* L8 W; B) x& w
- uvSize: [1, 1]
- A6 y/ I& S& _* d4 t' U - }: I% @% w) c& ^' s
- }
9 r. F( M& I* n, ^' t - let f = new Face(info);) N; @: v( m5 y3 @
- state.f = f;
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- let t = f.texture;
1 W0 Y n4 B1 G; ]: x+ ]: \' g - let g = t.graphics;& Y/ x. P. m+ O
- state.running = true; r# a4 {! }* F) t4 \: {7 r8 L
- let fps = 24;. m( N3 B& t& u( n0 `" \
- da(g);//绘制底图
N# g+ P1 N$ J; Q) v5 V, j/ k) \4 A - t.upload();4 |4 L5 s. p. w
- let k = 0;9 M( ^5 } K: t: M5 G
- let ti = Date.now();
4 h @# u2 ]. @* n* I6 J( A1 V - let rt = 0;& k7 r- K6 n; u' G' j9 f5 ?
- smooth = (k, v) => {// 平滑变化; B. s2 }: {+ z8 P9 K5 K
- if (v > k) return k;) D6 Y4 J# C S$ G, Q
- if (k < 0) return 0;+ \2 n j3 g( |( g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 z- h6 a9 `* t2 c
- }5 v( C8 I0 I0 s) q/ {" m: p
- run = () => {// 新线程) s' A4 j% b% v! H% Y
- let id = Thread.currentThread().getId();
! u0 s) ~( { I% C% v' c; F4 z# e - print("Thread start:" + id);7 f# w/ j4 _7 B. F
- while (state.running) {
) X) Z" T4 p' |: O - try {- W0 J8 @$ o' F6 |
- k += (Date.now() - ti) / 1000 * 0.2;
' K0 p' h4 c, P: s! g - ti = Date.now(); V2 _5 J" C. g( l3 V7 g
- if (k > 1.5) {
( _$ g; ]3 M( p - k = 0;
' p C% u4 m% `% Q1 l0 l - }
1 r# x) R5 Q d# c3 H4 R - setComp(g, 1);9 j# }' B& p( `2 `3 p- B
- da(g);
, [. G" s/ c1 R# P$ { - let kk = smooth(1, k);//平滑切换透明度
! V; A! b$ v* w4 O8 D/ D+ V - setComp(g, kk);5 B8 e1 Z% S* }: K- R
- db(g);
, O2 S1 d5 F+ P+ {- ~ - t.upload();2 a8 _9 d* W2 ~3 E! k: `' G2 r
- ctx.setDebugInfo("rt" ,Date.now() - ti);
' f T' C9 H2 w6 q* } - ctx.setDebugInfo("k", k);5 z; R+ p2 X6 z) T7 m1 [
- ctx.setDebugInfo("sm", kk);
8 x4 V {* h( z* f0 i) p9 { - rt = Date.now() - ti;
% ?5 c- F5 G Q - Thread.sleep(ck(rt - 1000 / fps));! |* h/ I0 y# W( D) Q, B0 M
- ctx.setDebugInfo("error", 0)
5 j! P$ R3 Y- D6 C/ N( ? - } catch (e) {0 d9 }( G" \! R2 T% b$ K; I
- ctx.setDebugInfo("error", e);) B; q p' _ x
- }
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- print("Thread end:" + id);0 H1 {* r' H. S% k
- }# G+ u0 e) |$ R" v: X- x. p
- let th = new Thread(run, "qiehuan");
9 u5 U, y e, R, Q, m6 K) \) d& B1 f0 B - th.start();3 U: [- i! ?$ H* i, j" f" T
- }' Q2 c8 @8 w7 e: i
- ; J0 C/ }& y9 G& c
- function render(ctx, state, entity) {
; a( [# W2 D0 J* Z9 P - state.f.tick();
' K9 ?3 K. b3 }. [' g4 H( B# K - }
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- function dispose(ctx, state, entity) {
8 M/ N+ c. g5 W! k3 J$ C q* c - print("Dispose");8 \# G. O& M3 v+ i/ v
- state.running = false;
3 P8 b, Q9 @( {# @$ |# C: b - state.f.close();4 k$ A7 \1 n9 _ {5 {" j0 v
- }
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8 a* V% R" m3 N& o' ^+ Y! B- function setComp(g, value) {
6 H4 O5 p$ d# }# ]# P9 x; G - g.setComposite(AlphaComposite.SrcOver.derive(value));7 O% S: ~8 S- e- q; y
- }
复制代码 $ d4 s4 }: m& j6 k' 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。
: ]2 b3 ?3 k5 l/ ]9 _& L0 C# l) L3 [. H" J# Q$ v$ z) P$ Q6 n
/ m0 y( h$ D! T. I5 c. x* K# j; `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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