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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。 r' A M- I1 e, w9 q
- importPackage (java.lang);/ R: R) l( P5 Q
- importPackage (java.awt);: Z) k0 i7 z9 |7 b* ?; R+ i
- " Q4 b2 G; y' o" ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 ~. _% Y4 X- V* _, s
- ) W* ~3 \. B) D) K u2 y2 p! v' ^5 k
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& _% A8 O$ Y4 _* f% w
" S4 }/ ?) n! ~. N8 E4 [! Q- function getW(str, font) {
- p& l/ R# _& z U - let frc = Resources.getFontRenderContext();
6 |1 }6 [- ? {6 H+ ]- z - bounds = font.getStringBounds(str, frc);5 p1 b3 E* b4 }/ ^1 N- p+ k
- return Math.ceil(bounds.getWidth());
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- 4 t5 [; L+ U' a* @
- da = (g) => {//底图绘制 @/ B' r1 ]5 u" I
- g.setColor(Color.BLACK);4 v5 x9 N& N# Q* e3 P, w6 X
- g.fillRect(0, 0, 400, 400);" |2 L- |' N) F8 X& M
- }
5 K, v4 L$ J7 H% r& w - 8 f' Y, G, ~8 ~7 f S9 g5 _5 U
- db = (g) => {//上层绘制
- K# p( u2 `) R% l" k W - g.setColor(Color.WHITE);& O5 a4 N$ N3 p/ B2 ?
- g.fillRect(0, 0, 400, 400);
2 N0 R# C9 N1 x1 Q' L - g.setColor(Color.RED);5 G3 \0 S( z; r$ Y4 z
- g.setFont(font0);
9 g: ^1 ?9 U' g5 K" [; @: x - let str = "晴纱是男娘";
0 i: c- ^( j$ i1 z - let ww = 400;1 }+ e% g; ]% o% D+ L6 `5 e
- let w = getW(str, font0);
1 L8 ]5 m% N& ~* `2 r - g.drawString(str, ww / 2 - w / 2, 200);. f* D7 |. Q( _
- }
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- const mat = new Matrices();& j/ A, I, C6 {) v
- mat.translate(0, 0.5, 0);- k+ z8 f' C+ L/ y& d
- $ e, m( o0 a7 _. ]" W
- function create(ctx, state, entity) {
/ K+ @' p8 f1 H. X, {2 n! n. r - let info = {
0 X4 n6 Z0 p$ d' X - ctx: ctx,
0 Z( y- } T" Z. g) ?* p - isTrain: false,/ r* D7 F1 [! a
- matrices: [mat],
: n( \( \8 O8 ^8 _ - texture: [400, 400],/ x# |1 l6 w) Q
- model: {
% U/ Y8 X- x+ @4 | - renderType: "light",8 b, ^! U% C& u2 W9 X" c* K
- size: [1, 1],
' ?2 v9 }# ^' D3 H, Y4 ] - uvSize: [1, 1]. ?2 U. D0 m' V2 @
- }% m3 R7 R' V" L
- }
9 H0 d* S" a( S& J# z" E/ Q! K - let f = new Face(info);
% T" x0 `6 v! K$ V - state.f = f;
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& _0 }$ \: @8 N5 S( r1 l. V D7 T- let t = f.texture;
2 V1 }2 `, E! f - let g = t.graphics;2 A8 t! N& x- X$ r
- state.running = true;
$ _3 |* h) s6 I - let fps = 24;
% w7 N7 s4 p+ J1 W3 Y - da(g);//绘制底图 e5 D2 Q i( n& F( A( a
- t.upload();, J) N& z8 Z% i8 p. V+ L, Q
- let k = 0;
1 r9 d6 ~2 W4 I3 x$ u - let ti = Date.now();
+ N V8 x6 K v( J9 U/ r# L" A, S' o - let rt = 0;
. U' s% W V1 s F- o) C - smooth = (k, v) => {// 平滑变化& l G* F! s D% R2 g: {5 n
- if (v > k) return k;$ T% d! Z) y2 R, k# b0 r0 s, Z. V
- if (k < 0) return 0;- \$ ]) v% {, [4 `& a+ K
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 D4 ^5 }$ R: w$ x, \0 B, Z5 | - }4 Z0 j$ e9 F8 R# J3 r* i
- run = () => {// 新线程
- J% u/ T9 N- e4 ^6 ]; k - let id = Thread.currentThread().getId();4 b, D* G& ^+ k) k! n0 {* C
- print("Thread start:" + id);
7 G8 n6 Y( T4 H - while (state.running) {
' F; r% e/ Q; t. G - try {
2 M7 _8 s/ t8 ~7 i: i8 z+ ` - k += (Date.now() - ti) / 1000 * 0.2;+ |: w1 D8 h" j+ c+ J
- ti = Date.now();
$ r9 \0 U6 }- M% z4 N - if (k > 1.5) {
$ r; s: h. t. ]+ R+ R) X: r* _ - k = 0;
1 b+ g! p0 { D5 q - }& H, t" A5 h" ]1 C( }$ t) J _% n4 [' V
- setComp(g, 1);7 H: E( C4 c# C' N8 d% c2 m B0 ]
- da(g);
5 l- ^5 u* S1 G6 K - let kk = smooth(1, k);//平滑切换透明度
6 e1 u- `& _4 w/ ?' u& ] - setComp(g, kk);
, c8 ?" W9 E7 d# q [ - db(g);2 J) D0 d! R5 A, P! |
- t.upload();
5 W# J/ N" [ p9 ?( k - ctx.setDebugInfo("rt" ,Date.now() - ti);
8 z( M8 D8 [2 a% l0 u2 n- E - ctx.setDebugInfo("k", k);
, t. a# C; y& s* _8 O! Q: B7 G7 ~ - ctx.setDebugInfo("sm", kk);) q( O8 S- x) E9 {! W
- rt = Date.now() - ti;
* B( r; h2 E/ { - Thread.sleep(ck(rt - 1000 / fps));
* S7 }# p- K* y% t* f9 k1 Q) D - ctx.setDebugInfo("error", 0), D$ v; S+ M2 Z3 f
- } catch (e) {
0 f3 v$ _7 \) h9 Q; C - ctx.setDebugInfo("error", e);
! |; [9 ^3 P: Z& X5 @8 r - }
- r- D6 f2 J2 P' h: ]2 o$ l - }* R0 y# P+ H" Z
- print("Thread end:" + id);
0 a8 S8 r4 k3 E8 Y - }
- U2 j% t" Z" w; |, X - let th = new Thread(run, "qiehuan");+ o, N& f: k4 z: o* ]# g
- th.start();9 D& w. o, w0 X
- }
* l4 {5 @# l3 h8 W( b: ]/ [& N( b) f
2 V* f4 Y5 o* C! ?- function render(ctx, state, entity) {
4 l Y7 O% z$ j' a8 q2 c - state.f.tick();# e0 T' T5 L- p
- }
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- function dispose(ctx, state, entity) {
' d# G" S( Q A% C4 c - print("Dispose");
/ D! j! }2 e0 G4 ~/ ^; Q6 J - state.running = false;4 b' \3 I& b% Q
- state.f.close();, G* d5 c/ @& k# R2 N
- }* O' T8 |' |- M4 v: @2 `
- 9 q0 G0 X! H( X E) J) a
- function setComp(g, value) {# b' x" V; \& D+ R& U3 _* a
- g.setComposite(AlphaComposite.SrcOver.derive(value));
* u! R* Y6 _* M, n+ D - }
复制代码 ; |" C+ {/ J: A) j2 ^
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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( f9 C- C: L& {/ q3 K顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)! A' V2 H% r; E( {$ f" ~
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