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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。
6 x" V( _1 g( c( l/ j( @" k/ @3 ?- importPackage (java.lang);
: _3 s! V6 c+ p0 [+ J) a - importPackage (java.awt);6 ^1 H- K u& J$ q' ~, | A6 H d# R
- $ d! h1 @) E$ Z6 y
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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( V a! F/ p% ~- ]0 h1 A. T- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 F: ]/ p/ Q# h$ ~
- 9 h* v( q/ F- H! i
- function getW(str, font) {
, ]( Y9 m, `4 m( f2 l8 u8 p - let frc = Resources.getFontRenderContext();. D) J/ J/ s5 P2 r! N' i) F3 D2 V" N
- bounds = font.getStringBounds(str, frc);! b5 s7 k! H( C5 Q
- return Math.ceil(bounds.getWidth());
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& f# I. H4 N! V- da = (g) => {//底图绘制
/ V; ]% i2 N. W4 q ?/ f5 x" m - g.setColor(Color.BLACK); ?! ^" O/ g! L8 j. Q
- g.fillRect(0, 0, 400, 400);; e% V X7 y! y
- }, \4 [- h# u' |/ Q
- : U4 [ U! H p, ~
- db = (g) => {//上层绘制
* K' q& B' p1 h9 U" e$ \% O& Y - g.setColor(Color.WHITE);. n3 s6 m6 x0 h1 \1 E
- g.fillRect(0, 0, 400, 400);' f1 N4 @+ M# q
- g.setColor(Color.RED);
5 z) E1 i- I% P. H V - g.setFont(font0);# S3 @: U* [8 B: Z+ G
- let str = "晴纱是男娘"; T8 Z2 g; E% e' K
- let ww = 400;" e% ]& Q: z6 |
- let w = getW(str, font0);
3 V/ u) Y' @4 I: q - g.drawString(str, ww / 2 - w / 2, 200);
5 s" j0 \' o5 N2 O - }
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- const mat = new Matrices();/ Z7 k8 H1 ]. c. X2 {, m
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
$ y% [6 g3 B2 ~5 h% W - let info = {6 ]( S" y( m, D6 `
- ctx: ctx,6 K# N/ j+ U1 @9 ~$ E; F+ d: l
- isTrain: false,
5 |+ k8 X6 a8 |. }5 z4 x: L - matrices: [mat]," {: @( Q, H& p0 h- y: d: t! q
- texture: [400, 400],
, @( ^3 m3 n( v/ C - model: {
1 l$ O/ l/ J; Q) s, r/ a - renderType: "light",, ]- a$ b3 p5 p2 z1 A& O
- size: [1, 1],, h7 [& B% a5 K1 ]0 v
- uvSize: [1, 1]
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- }% I" Y2 d4 u1 J1 y, L
- let f = new Face(info);8 g# H1 Z% T9 D+ b
- state.f = f;
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, d' ]! g6 N# n% l$ X( F' }6 [9 F- let t = f.texture;& Q- m5 _- R/ c( T# D
- let g = t.graphics;
6 _) j5 V% i& ?7 }: F - state.running = true;, T8 _8 @; n# \% Y
- let fps = 24;
3 ] l# z& ]9 t* t& [ - da(g);//绘制底图
' t! N9 z5 U+ s - t.upload();
! z6 Y9 u! |; R! Y3 v( Z2 r9 o - let k = 0;) ]+ R( K3 q4 Z" l& `
- let ti = Date.now();
* p) a- R6 v( ^: M! y - let rt = 0;
0 C M5 g& x% V7 m) s - smooth = (k, v) => {// 平滑变化3 f% L/ S: Q" m* A
- if (v > k) return k;
- Q# m& R! k8 `0 `- P - if (k < 0) return 0;
U8 G9 R! r& @$ m. s! r - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程8 {- v$ l9 O/ \& @) g
- let id = Thread.currentThread().getId();5 n0 e6 H7 H" L7 {) B( b0 D
- print("Thread start:" + id);! l1 B& x0 n2 @+ D, F; E( _
- while (state.running) {
- o; n- R0 `+ I; o- |1 q - try {
: B7 u& ^: n/ X- {$ e1 b - k += (Date.now() - ti) / 1000 * 0.2;" y% G" R7 ^4 k6 g5 w2 d
- ti = Date.now();& L) Z ^4 U+ A2 ]% Y* _
- if (k > 1.5) {
( M* q+ @5 n5 z" R - k = 0;6 ]4 [$ z; Z4 w: r# e6 v% |
- }
( h) ^; K$ U* v3 P( N - setComp(g, 1);8 k; f" v. L ~
- da(g);4 B$ Q' S4 p# e
- let kk = smooth(1, k);//平滑切换透明度5 P% h6 u9 J/ [! W0 i) S
- setComp(g, kk);% ^* w: p+ |. `) R, ~! ]8 V
- db(g);) @. G# s6 V& S$ T4 K# i
- t.upload();
! O% C( Y; T2 z - ctx.setDebugInfo("rt" ,Date.now() - ti);
& t/ t5 T% x! M/ b8 k. @ - ctx.setDebugInfo("k", k);1 Z9 g M! C: f1 n3 f
- ctx.setDebugInfo("sm", kk);
2 o3 p% a* o+ B2 x& X+ @ - rt = Date.now() - ti;3 I+ M1 ~" C# @1 D6 j5 Y- ~$ w
- Thread.sleep(ck(rt - 1000 / fps));% N5 t2 t0 O* H. ?( E; F K
- ctx.setDebugInfo("error", 0)
* u3 r4 P' V% ]( F - } catch (e) {
1 J v* @6 @5 e. J - ctx.setDebugInfo("error", e);
* \/ B8 W$ R; ?) s% K. C - }3 ^. n7 O2 G7 ?- U ]
- }; E% t6 {! l) z4 i, I
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
. `% g [0 A \4 F - th.start();
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- Y9 T% V" T6 i( {$ J \; ]
- function render(ctx, state, entity) {/ a! z) p9 D$ W
- state.f.tick();
- Z. u5 G( ]& w1 A; B) q - }
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- function dispose(ctx, state, entity) {' W$ ?6 ^/ V y# `. @+ F/ B% Q* P
- print("Dispose");
& U+ J3 F4 g* @* v" C' x4 O - state.running = false;" L: L6 o& |. q& n
- state.f.close();7 ~0 k7 N! ?; I* j0 Y
- }0 t. Y8 Y2 }; n2 ]& A8 ?
?: j7 Z* l2 V: F, t4 P3 X- function setComp(g, value) {$ x0 D3 \ E3 i1 `! G
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 P( L u( A$ I- o( |
- }
复制代码
$ ]" O: @: T1 c7 U5 U j- e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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% A4 h+ F, @/ W: q! t. k, S顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! G) L- v- M( C3 F! b
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