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4 B/ Z* h- N( ^& L6 E" M% D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 s* S3 d; A; {; w+ u; R! l2 e
- importPackage (java.lang);7 {$ ]# F9 \7 F, \4 K9 P" c5 h
- importPackage (java.awt);/ j q% k7 d+ K c4 I
- : P( |# X2 R5 o' r2 e# L
- include(Resources.id("mtrsteamloco:library/code/face.js"));* i5 i2 J" {# F6 a/ O, Z+ Q! V
) @+ Z* x. L3 z9 C0 @) n- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
/ I: \3 u, o3 K - & S3 y$ ~& `: i: _
- function getW(str, font) {1 i. i/ [" w% Z, j0 G0 ]% O: |' p
- let frc = Resources.getFontRenderContext();
! {( `( f) b- z9 ~ V3 i) ?: X& ` - bounds = font.getStringBounds(str, frc);
+ O% v# I: E# w! M5 ]3 y* \ - return Math.ceil(bounds.getWidth());( A3 E& A5 v9 q: g# w$ C
- }; j1 l1 g$ x: I) [$ f7 p
- 2 ]8 Q$ c8 ~' U+ v* P7 D
- da = (g) => {//底图绘制: O z; m( G3 s; a/ a9 J5 [8 _8 u
- g.setColor(Color.BLACK);! I z- f- r- P: g
- g.fillRect(0, 0, 400, 400);
( n" p6 L$ l% J% D) F - } X0 B& D2 y& u5 Z6 o! G; A
4 Y& I# P( M- H4 s$ @4 ^) L- db = (g) => {//上层绘制
, k* j, s' r8 L/ T- k6 t* u - g.setColor(Color.WHITE);; }! H0 o: X% c8 k$ _+ o
- g.fillRect(0, 0, 400, 400);' Y% I% o/ ~+ I% m
- g.setColor(Color.RED); }, z6 e7 R: m+ h1 B
- g.setFont(font0);) e$ \4 q$ O' S3 T- ?
- let str = "晴纱是男娘";
2 Y L) y4 W: j, P! F - let ww = 400;; K/ ^/ G. v3 }# z/ m
- let w = getW(str, font0);" E! B0 v6 k) j+ U1 D' K) r
- g.drawString(str, ww / 2 - w / 2, 200);$ d% u1 X2 P, K0 u
- }
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2 M, I2 R# g) W. q1 h( |2 W- const mat = new Matrices();# }! _% t& z/ D" u' u! w
- mat.translate(0, 0.5, 0);! M. T0 ~# N2 d) Q
- 9 C1 q/ X( P9 g: @& R: s0 U
- function create(ctx, state, entity) {
7 J" c6 y1 [: S! T8 o& h8 ?4 N" _ - let info = {
- ^* |7 r ~5 n& o - ctx: ctx,
8 b- o1 m' s$ g4 Y - isTrain: false,
' L- F9 i- |1 B4 r3 H! K - matrices: [mat],
1 e* Q- k5 }0 w6 P2 F - texture: [400, 400],
- P( y1 @) ^4 P - model: {
- y# \ J# |# o% B+ \, M$ k - renderType: "light",
0 o! Y) M& k- h6 c: \& z - size: [1, 1],
+ U9 p; @6 k& K* u) K - uvSize: [1, 1]
' `$ |, e7 m' F/ h - }
5 x3 z7 N2 ~6 r ]: Y - }' n! d7 X# j- m/ b
- let f = new Face(info);9 ^/ f* R0 e& z' H
- state.f = f;
' r3 u- d# H6 J7 }4 d* b X
! |' b. P3 k. s" O1 O- let t = f.texture;0 u* H+ m2 N# f4 R0 y" h8 x
- let g = t.graphics;
3 i5 a' B6 Y, K5 l% M* j# m - state.running = true;1 m( s7 y$ u4 W) h8 j4 w: j8 [
- let fps = 24;' P4 s& N) Z! Y
- da(g);//绘制底图
, A) g; \2 d; ~ - t.upload();
3 P7 O$ x/ K8 r- `! t) y% x! a - let k = 0;% R) [2 K- e9 ~2 |/ }* H n
- let ti = Date.now();
" m) c C4 U' }- F( @! D5 _ @ - let rt = 0;5 b, A5 W' `$ `! ^* \* L) W {
- smooth = (k, v) => {// 平滑变化6 J- e6 u- G' w0 {( H
- if (v > k) return k;# {* l6 K) {. {' V% G
- if (k < 0) return 0;
# v+ ~& @/ Q# ?" p# Z r - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! Y0 g ^* G @+ Q - }
& m0 X, I8 }% ~+ L+ r+ Y6 j - run = () => {// 新线程
' j+ F9 w0 a8 L) G1 B - let id = Thread.currentThread().getId();
$ p# g* U ?9 Y1 _+ D - print("Thread start:" + id);: }% @) ]: E, a' L) X+ N
- while (state.running) {
" P+ j7 I9 f# M/ M& d# o0 w - try {* D3 V! o6 l9 H" M3 {
- k += (Date.now() - ti) / 1000 * 0.2;
7 R$ B* v- s: Q - ti = Date.now();
$ S* C9 j# P1 D% C1 ^; ]& U+ e: V: ]9 L - if (k > 1.5) {
) C. \3 l! t2 F7 C0 e - k = 0;
) ^! O- C" j ?9 L& \- |; W - }
( V$ s( ]% H) `1 s - setComp(g, 1);% ^; }2 a4 D. T: k/ I: S
- da(g);
. h5 o7 K. O3 h# Q - let kk = smooth(1, k);//平滑切换透明度
! {" s1 V% Q0 T- u8 \" Y# M - setComp(g, kk);
2 q! f7 h8 g7 z) H* a% Y - db(g);) F0 d* a3 `& W( \/ r2 v: r/ h0 l
- t.upload();
3 \4 q0 M& d4 q1 ]0 z- t' g$ ] - ctx.setDebugInfo("rt" ,Date.now() - ti);2 M9 `. r' r. T3 j6 Z+ G) _
- ctx.setDebugInfo("k", k);
0 v \" a9 Z& }" m - ctx.setDebugInfo("sm", kk);" D: K% w6 q- o- `
- rt = Date.now() - ti;$ u1 u0 \% g5 J) V/ \ e3 E: g
- Thread.sleep(ck(rt - 1000 / fps));
8 v) a) u: h3 T3 S* _2 h5 J. d - ctx.setDebugInfo("error", 0)' h2 ]; \: V- T! C9 U& M, v
- } catch (e) {& V6 b, n2 U7 d7 [
- ctx.setDebugInfo("error", e);2 j" ]# |/ k9 {: ~& C. d
- }( v$ x9 J/ B7 \0 ?9 _
- }
$ b- L% P0 V/ f8 z - print("Thread end:" + id);
* V( Z5 V; S, D, X/ Q) P# y - }. I2 ~' N' e7 V: f1 {
- let th = new Thread(run, "qiehuan");
" T. T3 z( M/ a* W0 X8 Q! F - th.start();8 l/ |4 o ?2 D. W8 c2 K; v3 x
- }
" p" c$ r" ^. Z2 d4 [) D
5 [0 A2 X" n1 _9 b, U( O7 A2 N- function render(ctx, state, entity) {5 V- m9 c- x; O9 J
- state.f.tick();: m R4 ]$ Y) F) k, |; [3 R5 S
- }2 o6 V6 @ D. \
- . d+ t( D. K) b' y: ]2 g
- function dispose(ctx, state, entity) {
9 I0 C) Q8 ]+ [- _) Y - print("Dispose");& O/ I& | g6 X" a
- state.running = false;9 q, U5 V6 T- j D7 E1 z
- state.f.close();" T! N7 P% H! j5 o# |
- }; G7 f8 ^6 ]) r7 l, R" a2 \% u
! h! X; @8 ^2 x3 M, Y: [4 {: N- function setComp(g, value) {' L% q$ H2 P9 l
- g.setComposite(AlphaComposite.SrcOver.derive(value)); z A1 P5 _ U: v+ i5 ]& I
- }
复制代码
, s1 i! T: j, m8 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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" o0 v/ v( d/ D/ A: w+ x& K
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