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3 d- l9 M$ R; a4 B5 i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。; o. W' u5 g( X$ k% }
- importPackage (java.lang);3 p( p8 u! x! H& ?
- importPackage (java.awt);) W' E4 y6 y% ~& t" K% N, f/ G9 r
- ; H8 ]4 |- @6 p6 _9 B' @
- include(Resources.id("mtrsteamloco:library/code/face.js"));
/ v5 W- G; u- O# o6 C, N
. G( s4 O& M, J% h+ m- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 X# q/ C% A4 o3 J' E. W p, R
@. |. j" w1 x J2 V6 u% J- V3 k3 M- function getW(str, font) {" w `1 K/ [$ l/ M# f' [2 _
- let frc = Resources.getFontRenderContext();
+ u2 I- r m$ R) i" C6 j8 G - bounds = font.getStringBounds(str, frc);0 i! Q& H, d- x9 L
- return Math.ceil(bounds.getWidth());8 v8 c: d3 }. A* K8 ]
- }" K* D2 d0 f* m2 q
; y- u* P6 X* ~- da = (g) => {//底图绘制+ Y6 D5 g1 o9 @" n$ I3 Z
- g.setColor(Color.BLACK);
" X+ u2 U# H1 K3 e8 R& F1 n; Y& G7 v3 ^# b - g.fillRect(0, 0, 400, 400);; K$ T( i+ W2 Y' L+ b
- }1 p9 S- Y7 j+ _2 u1 L4 i
1 ^* t& b0 G$ V* p1 O3 o' E. s- db = (g) => {//上层绘制
3 h' G0 A" m& p - g.setColor(Color.WHITE);
7 {9 T# B' }4 s6 `) @! _1 P - g.fillRect(0, 0, 400, 400);
* |- I3 i% ~' { - g.setColor(Color.RED);' S6 I9 ? S7 [/ H& }: {
- g.setFont(font0);
. V: X$ m$ M8 a9 Q9 G& s* X - let str = "晴纱是男娘";
" \2 \" F9 `7 Q/ A; F - let ww = 400;7 ]+ m; Q+ G9 c# j
- let w = getW(str, font0);
/ r. j. P5 y: ~4 u - g.drawString(str, ww / 2 - w / 2, 200);% a: k! C9 x1 Y4 S2 V( q
- }0 ?0 {6 [4 Y" P0 s c& N
- B x0 G: A: C- b! F( N$ C
- const mat = new Matrices();
4 q+ K @ L# l" l; B* O' h3 h - mat.translate(0, 0.5, 0);" i2 m- ?# B& }6 s& x! K4 V, F
- + N E# A$ M9 J! H
- function create(ctx, state, entity) {
; |& c; A2 F* B8 I9 c5 ?$ c- B/ z - let info = {' f& z! ^! R" f) m! [- G. @, {
- ctx: ctx, Q: d3 r3 d1 a. P: T* o- e; T
- isTrain: false,
; @, `8 J; z \ - matrices: [mat],
& E- i2 b) L; Q! E: y1 @ - texture: [400, 400],% ]0 x. D3 g# F
- model: {7 e6 O! k3 U. E7 J4 j
- renderType: "light",8 P* |9 D1 ~7 V& G$ |4 K1 ^
- size: [1, 1],. L$ d; w. p" O+ w" E! B
- uvSize: [1, 1]
4 {. d3 H% p6 M9 C$ y* T$ I% D - }9 P3 n2 @/ P5 R' V+ q- K
- }
, _' f, L: J7 O: o/ @! N+ K) e - let f = new Face(info);
O2 t3 @7 S% D( i - state.f = f;: c# R6 B' _3 n& ~
- * {1 m2 w0 A5 g* a
- let t = f.texture;
0 @8 m7 _+ ]1 D% B9 d, b - let g = t.graphics;% j* g, B1 Q* N7 a( a5 h8 m1 y8 z. O
- state.running = true;
/ p+ J. Z3 |$ W+ c' A; M - let fps = 24;1 n" L& f2 F" P) {
- da(g);//绘制底图
. k3 a) z! b# `+ q6 m - t.upload();" B3 D7 T) T: v" u8 N8 C
- let k = 0;
5 I' Q5 T% @# |* {, G - let ti = Date.now(); @1 L7 @* `) }
- let rt = 0;2 j1 r/ e& L; [- o
- smooth = (k, v) => {// 平滑变化; @, a; \$ C" Y8 S
- if (v > k) return k;
1 k+ @" e/ j: f( M( h - if (k < 0) return 0;- A7 i8 N" }6 c0 {& f/ o, E" f
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. Y- W7 s5 t8 a; a/ S | - }
( y _ v5 c$ v. M! ?( d - run = () => {// 新线程
- Q. h5 P. K* r2 P# u; \$ Y! A+ l - let id = Thread.currentThread().getId();% n( C, @, L3 e2 E
- print("Thread start:" + id);5 S* s9 r0 e+ i, f2 P
- while (state.running) {0 x( v7 V# Z$ |% G2 Z" H$ S2 k0 J3 i
- try {
0 u& B2 D3 k2 O( i/ P - k += (Date.now() - ti) / 1000 * 0.2;) |* n8 f6 g* A) g
- ti = Date.now();/ {3 H5 n2 [$ f& p' X
- if (k > 1.5) { \( j& }' x5 F t% o: \
- k = 0;
6 ^# Q3 v$ m* q7 u - }
% y! {$ M" F2 I5 ?/ S9 v - setComp(g, 1);
5 ^1 ?) z8 w$ H6 j; A5 N - da(g);# o( M6 P7 s5 U' j8 D9 u
- let kk = smooth(1, k);//平滑切换透明度+ N+ o' X1 K% |2 G: z1 {
- setComp(g, kk);6 \5 U1 S, N1 I" u/ ]6 m d& w
- db(g);
1 h' U* ^# J2 N! u8 j - t.upload();
' g* S; b" s) E( z" E - ctx.setDebugInfo("rt" ,Date.now() - ti); v+ C8 {/ G# Q3 k6 N* \. j
- ctx.setDebugInfo("k", k);; l1 \5 \. p. R) A
- ctx.setDebugInfo("sm", kk);
/ ?2 v' Q/ R/ [4 q8 `0 N7 Q7 b5 ] - rt = Date.now() - ti;
; \! y! L' s$ [" y - Thread.sleep(ck(rt - 1000 / fps));1 K2 f4 ^2 n1 U+ M) J
- ctx.setDebugInfo("error", 0), q, ~8 |; d: w1 w
- } catch (e) {2 T) |( a5 ?$ `* @' {! K
- ctx.setDebugInfo("error", e);
3 Z! A4 c3 w0 L) v& R! q* n: s - }6 |$ \: M" [* f3 i2 l) B" A
- }
( ]# ^! `! n2 {8 ^) G - print("Thread end:" + id);3 z* q. x$ r$ k" w* l0 S9 \
- }* ?9 O8 ^( S2 T7 J
- let th = new Thread(run, "qiehuan");
7 ~* i, u- Z- ~% c - th.start();
& r1 U& F9 Q; }, Q$ r$ C - }& [) n- k- S1 G4 j
- ; P" N% o. g1 @, I
- function render(ctx, state, entity) { D: Q. U9 \$ p
- state.f.tick();% ?' E$ f# }. C, X
- }
+ J% \( T! T- Q6 W0 j& J
0 V; F3 r) e4 U- function dispose(ctx, state, entity) {5 }) Z& D, u7 H; ?' r% |2 ]# f+ M# X
- print("Dispose");) [+ J0 N- P9 ?) g) N. U
- state.running = false;/ e2 O3 c5 R4 _' o/ m
- state.f.close();* ~- l7 R _ t, V( @" M: S
- }7 y& ~* s( h% t% R% B$ t
: j$ N3 z- u+ h. X- function setComp(g, value) {& d" x" _/ D" i0 D( x& e1 C+ B( c
- g.setComposite(AlphaComposite.SrcOver.derive(value));7 L4 e- O" C! G6 f
- }
复制代码 : d+ p8 Q; C- k& K) l# f* u
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。$ E7 [# f) v, n: [( U; a% W; m5 o
7 {1 g5 h" T* x* A8 y# m A; r, @: u# f1 D+ i8 p$ C! S! a
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), v, z4 Y; b" I, o k2 }
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