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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。
- i1 d J+ m1 ]4 ?. C5 R7 l2 r% N- importPackage (java.lang);5 H% f9 E# t; f* [6 N) G
- importPackage (java.awt);. k5 O. W j; b: W" S& Y% q) n
+ Z$ y. s' |$ V9 ^# r4 ` o- include(Resources.id("mtrsteamloco:library/code/face.js"));; B K9 N3 r/ E) B- C6 r4 p' w( u
- 2 @. [6 w6 H7 ~9 j/ G& w- C+ ]% V, f
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" _+ J% V- t$ y" W
: T: r+ Y" y& w" n. x' e- function getW(str, font) {/ Z3 l1 N7 m; R+ [
- let frc = Resources.getFontRenderContext();
8 P- y' i& a4 j, A* b8 x' H2 i - bounds = font.getStringBounds(str, frc);7 A1 l& L; I6 }4 P
- return Math.ceil(bounds.getWidth());
+ p5 ^ {' B9 _ - }
# C; D. m; t# w, H1 ?2 T/ s* @ - % y. ^! k1 y: M' B
- da = (g) => {//底图绘制
9 V+ m, r: g- d- {% R9 H9 y - g.setColor(Color.BLACK);9 A; {+ K' J4 E1 |' T$ n; G. p( C4 S
- g.fillRect(0, 0, 400, 400);- U$ |7 S3 ^+ f8 `( w: z
- }
# f4 X( g: u8 b* b# }9 X
$ V( o) D) s% Q- db = (g) => {//上层绘制
% Y1 a5 A+ ?3 {" X: p7 A1 N! i# j( I - g.setColor(Color.WHITE);
8 o1 t4 w0 ]: J' X: W; J; d. O - g.fillRect(0, 0, 400, 400);
5 Y8 N# a- I& I) X5 G* `) x - g.setColor(Color.RED);# C+ f% F# Z [+ r
- g.setFont(font0);, r8 X2 ]: u r: j) r' E D! j5 T
- let str = "晴纱是男娘";
, Q3 ]! r' @4 J3 d3 J - let ww = 400;/ i V- p( e2 J9 Y5 c
- let w = getW(str, font0);
" a! Y1 g5 ^8 Z: b - g.drawString(str, ww / 2 - w / 2, 200);
6 N+ ~. ^. b* b, w& r0 D" I - }
: r: D! }& \+ _) q' O7 E; _6 M, T
3 [# H5 y, }1 E1 W8 k. u' L- const mat = new Matrices();1 |: }/ T" X1 @
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {. u6 s ^( y- D1 K0 Q$ G% C6 N; L
- let info = {- m7 j7 `6 I* Q1 `7 f% K! K) x
- ctx: ctx,
% a' V2 Z# T! q+ `; w9 b- y( `, Q - isTrain: false,. z4 m/ {. e. i# f* Q! T
- matrices: [mat],; j5 g% K" C' S& X# ~
- texture: [400, 400],
* I8 u! I# N' a# A* U - model: {. v4 e1 H1 B) a7 C
- renderType: "light",
0 U' e$ s; H5 b" C4 ^: v: S g - size: [1, 1],
' x2 ]9 \3 P* ]7 |8 z: q5 O: u& r2 h - uvSize: [1, 1]
* @( V I& x5 M/ X4 c+ m - }
9 z3 x, n1 t/ c - }
5 Q/ n/ `. g4 g. p" X S' ^. H - let f = new Face(info);- K# }0 `, N6 N
- state.f = f;! L+ Y o6 `, {8 }& n
- 7 F- m6 ?6 {( [+ x# ?/ }! F* J9 i
- let t = f.texture;
& r/ [+ l% _9 {; C( J - let g = t.graphics;+ q1 T% g5 k6 [, x2 i6 D) ~
- state.running = true;+ C, l( B2 z( ]
- let fps = 24;2 |; l3 A; @3 n3 p
- da(g);//绘制底图7 ]6 i8 k8 t5 v
- t.upload();9 P# z7 \% M6 [9 m
- let k = 0;+ a$ C1 X. v, L
- let ti = Date.now();' W# _* S9 O% s( T" ^
- let rt = 0;
: E: x7 K% ` a2 K+ {8 K0 D - smooth = (k, v) => {// 平滑变化
7 b8 e9 E# e9 m6 z - if (v > k) return k;5 M0 [* T( \9 k. `3 a
- if (k < 0) return 0;0 k5 h# Q% A8 b0 _. T
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( e/ {) ~* S! h
- }
' O3 W# X& b' C! t, _( S r - run = () => {// 新线程 N% b: ^& e# E
- let id = Thread.currentThread().getId();8 b3 h3 B" K2 k4 R" {4 ^
- print("Thread start:" + id);
5 m4 B4 `+ J' c; O1 F7 Z$ S - while (state.running) {/ x6 W l8 [% o- l$ p6 v9 n" X
- try {
7 i4 F( J$ L8 W5 o - k += (Date.now() - ti) / 1000 * 0.2;, @0 b) i' g/ F/ l( S# @% B0 T
- ti = Date.now();
3 n5 {. g( N+ u! v - if (k > 1.5) {' E4 T7 @* ?( }& s# F% Z" u
- k = 0;
0 X/ b7 e5 R& r% u8 \ - }0 o' O. Q# Y+ s+ x$ h3 _
- setComp(g, 1);6 Q% b- P' y' d% @) U
- da(g);
1 a' [7 T/ i! t' n9 h& \8 T - let kk = smooth(1, k);//平滑切换透明度
9 n1 A, l) {- l1 k - setComp(g, kk);. X0 R) }: J- b. l4 d
- db(g);
6 s9 f$ g8 \! Z x) R$ D2 d4 J - t.upload();
0 t/ {' M8 e8 P) U: X - ctx.setDebugInfo("rt" ,Date.now() - ti);
* C2 I8 R7 w# @ - ctx.setDebugInfo("k", k);
& _9 |2 Y) \; r8 x; }9 r' l; B - ctx.setDebugInfo("sm", kk);
8 Z0 }" T! g2 f% ?4 u - rt = Date.now() - ti;3 q: V$ i% j( P. u
- Thread.sleep(ck(rt - 1000 / fps));
5 c9 q( X! X" W8 q) X - ctx.setDebugInfo("error", 0)5 l* r! ]' A( i; `/ C
- } catch (e) {
S7 F& V# L2 y" X - ctx.setDebugInfo("error", e);
% P- _/ Q' o8 Z - }4 l) m! e- N4 s2 W2 v
- }0 W: w3 ]7 c$ X5 x( o" o
- print("Thread end:" + id);
{, P0 n ]$ B, X( k - }. L( Z8 C, O" a2 i1 P( s2 _) p7 D
- let th = new Thread(run, "qiehuan");1 t+ p! W' r' {; Z+ O' l4 h; Y# x4 l
- th.start();+ r! |3 e) E/ _3 M
- }
7 N( n9 }+ C( ^+ L4 z( |9 R
7 X" y; Y' N- S$ t2 |3 i8 E) i- function render(ctx, state, entity) {3 ~- N" d2 g# h" i$ U6 ]% g
- state.f.tick();
' d7 W3 i+ n" E: C4 _. e - }! Z" Q F) ^+ Y" d2 b" @) _
! O5 b7 [, z" f B! A( O- function dispose(ctx, state, entity) {
/ v. @6 J) B' x7 r - print("Dispose");3 [, i# B( q3 s: N% \* p
- state.running = false;
: A* N1 t* n- j3 `- Y - state.f.close();$ Z5 F' _5 q, c7 }% L. @. t
- }5 F3 M" ]6 u; d& [. U
- ' l0 b. Z- J0 X' J5 j
- function setComp(g, value) {. D+ Z; ?6 n: I7 x- t* m! v% _0 j
- g.setComposite(AlphaComposite.SrcOver.derive(value));! ^5 x( s0 Q* Y1 h( V
- }
复制代码
, l0 V' t+ _$ C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。( E: a D6 D6 D8 [" r
4 k8 ]% W" H; v
$ d8 T* z/ H' l y" \) E( p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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