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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。
7 q D/ p3 F, l2 n- importPackage (java.lang);
/ @ F0 |' M0 D0 q) v7 i - importPackage (java.awt);1 k) a/ J M9 R" q) ]7 G, `& z' u
- ) [ T' |* V2 E+ Q& x
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 {8 Y, R" S; x( u' |% h5 _0 s
- 9 n0 E2 ]7 g) D- D- L. {5 P; c
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 i1 k. h2 E1 b6 d
- + R0 h5 f9 [& d' j* C7 g1 |
- function getW(str, font) {
3 F2 g2 F+ l0 t0 b! K - let frc = Resources.getFontRenderContext();
" \) T8 Y- p# [0 D - bounds = font.getStringBounds(str, frc);, D6 R+ P7 _/ }) }# N# R8 @
- return Math.ceil(bounds.getWidth());( l" x$ y1 L9 q* Z
- }
* Q3 G& Y W! T
. F/ M4 D1 h7 r3 {- da = (g) => {//底图绘制
. l8 B7 G5 i# Y" b6 | - g.setColor(Color.BLACK);
, {' i9 o+ y a4 W$ u% `# s, C - g.fillRect(0, 0, 400, 400);
0 _( |9 r" c) s. _! ^ - }
, Z$ V$ u, J+ k* n' t- ]* f - E% }9 {% L: F5 {5 H2 B; H2 V+ `1 j
- db = (g) => {//上层绘制
( S8 w! C; [) Y p" O5 j - g.setColor(Color.WHITE);/ `3 l" }# J9 u( D# d. ]$ n* C3 Z
- g.fillRect(0, 0, 400, 400);
; ?0 y* o, m+ z5 G1 b* a, U( i+ D - g.setColor(Color.RED);
* {6 L% q& ~, B- C, b& z5 |9 N - g.setFont(font0);
9 ~; t8 b( P, j0 {9 ?* d u& s - let str = "晴纱是男娘";/ r* G& v0 ?: x9 T8 t( \; J
- let ww = 400;+ z- ` w5 g- `* M4 V1 T+ }! ?
- let w = getW(str, font0);& _- C6 h! K1 i/ H- G
- g.drawString(str, ww / 2 - w / 2, 200);( A) }- U# M- T
- }
! B6 \( P- |$ h& U) k1 a! w
0 N: ^2 ]2 Q& r, ~1 ` q- const mat = new Matrices();0 N! N/ Y3 i' Z9 j/ r
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {( g5 x( J& F! u6 ~
- let info = {" X4 @7 _( N+ [, x4 l1 \
- ctx: ctx,$ v. t4 ?' ]( D I
- isTrain: false,/ K1 u( U V' C3 g! ]
- matrices: [mat],1 d5 V2 F F/ V9 }7 |
- texture: [400, 400],
g7 i/ E6 \. L7 {2 f1 Y) z: S! f3 E - model: {
6 ^( f: A& ^ ?$ G+ I0 f- _7 { - renderType: "light",
! l, N) ?- k) i6 X$ z | - size: [1, 1],
8 x% T3 V4 ]/ d3 i9 d5 A - uvSize: [1, 1]
2 Z% F( l, p4 _( d- c8 k5 {& p3 U - }8 U f4 [4 M" b: W! u" s' ] x
- }
" ]1 J( e2 T: a% G/ ? w% ] - let f = new Face(info);/ u9 r1 u6 Q5 E
- state.f = f;' k" d- l- O5 L) ?/ o* g1 ~" D- y
- ; L4 p( L( {- V% X, w3 E, }; A
- let t = f.texture;% w4 ], o" J1 }: {
- let g = t.graphics;
/ x0 P1 ]# P. c& p* n3 x - state.running = true;9 {8 X% b2 l7 C& D9 d
- let fps = 24;1 {# D; {) M& ]2 @- k
- da(g);//绘制底图
6 j) x* V) [: ] w3 N - t.upload();5 i1 o+ \) @4 f4 \ T/ D# P
- let k = 0;# S3 p, R, E Q, f6 t$ j7 b% S5 e! |
- let ti = Date.now();: A9 [1 u7 T' Y- d, h
- let rt = 0;7 M G: `( r1 V8 F' ^5 P* Z
- smooth = (k, v) => {// 平滑变化
( l7 @ `* x; O6 ^ - if (v > k) return k;, m. Q. \8 F( w, s! {, F
- if (k < 0) return 0;
! E# w! ^$ o/ }: S, F) o" f$ v - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;$ k- D4 Z/ S8 v" h c" P, E
- }% \6 `7 z, U' k: Y
- run = () => {// 新线程
0 o, R' b, _" n+ X0 K. Y - let id = Thread.currentThread().getId();7 T6 H) s8 j' W" H7 G
- print("Thread start:" + id);4 Z% r# x6 S& M; ?) q# n( c( D
- while (state.running) {) D+ x. e. O" P- [1 b
- try {
9 o) T7 T9 m( i" `1 e - k += (Date.now() - ti) / 1000 * 0.2;
% R8 ]/ t: z8 Z - ti = Date.now();% T, c$ ]) P! U# ^: L6 L2 A
- if (k > 1.5) {
9 ?- D# V" ^1 j4 Q6 R" X% N3 a - k = 0;9 V2 G7 o6 s; X1 h
- }: o) b7 t6 a! u# x
- setComp(g, 1);4 H( m$ w" |7 }" i( v
- da(g);* x1 c9 w1 H& ]
- let kk = smooth(1, k);//平滑切换透明度
" L4 Z' }, J- S - setComp(g, kk);. K1 n+ P, v/ r$ e% m
- db(g);
8 e% u: h1 `! ~# S7 H - t.upload();
4 Z+ T, R3 h8 e- b; D0 G) K - ctx.setDebugInfo("rt" ,Date.now() - ti);- \$ X& ~: X! P5 e8 @8 I2 f# [7 y$ F
- ctx.setDebugInfo("k", k);
% W8 T- r& u0 Q* j - ctx.setDebugInfo("sm", kk);' G6 P& @, A( C+ J9 \* {; ^
- rt = Date.now() - ti;; Z# {% R- T. f5 L& u c9 H( w: u
- Thread.sleep(ck(rt - 1000 / fps));
8 [ B* y' o* d+ L: ]& L7 a! h - ctx.setDebugInfo("error", 0)
2 y# }/ R4 ^/ @; t) I - } catch (e) {
# }* v8 [2 C6 y2 Q4 D8 | - ctx.setDebugInfo("error", e);! t% T) X, I% P/ P, q
- }
3 i. l/ z! U% J9 O0 U - }
0 X2 o# o0 B- V - print("Thread end:" + id);
3 C- h% N( d. L - }
7 M0 |8 }3 o: Z7 c q9 K9 j1 f - let th = new Thread(run, "qiehuan");
7 A1 Q- {) N1 h4 R" O' H - th.start();0 n: y: Q9 ?: `: C% J
- }
! `5 i( T# j- `' u( e
; k6 P4 Y q* K2 g. V8 J5 F |- function render(ctx, state, entity) {
& E, ?( M! ~4 l( \ - state.f.tick();
1 s4 I- v" K D8 h5 m# K% f - }- R) X J7 L% U$ L3 h# E
- 1 S6 v$ w7 f# g& H# S2 E6 {0 K
- function dispose(ctx, state, entity) {
) m; V5 B) W7 y- j) R - print("Dispose");
+ E- m( O ` R. u$ T4 ~ - state.running = false;' `6 G& Z, e6 ?
- state.f.close();
- U( a _3 t1 J& \ - }8 E; U9 T9 _2 x5 X. p3 i
- + Q3 p5 x8 R# Z
- function setComp(g, value) {
0 U! A Z& s k" E9 [ - g.setComposite(AlphaComposite.SrcOver.derive(value));( [( D; f# G' f; V! g
- }
复制代码 / |) ^# ^, b" C6 d3 l
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)- @2 x9 Q& F; F- ^
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