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2 K. t8 r2 J* V, O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。1 k% E) V+ h5 n
- importPackage (java.lang);0 d+ G- W# D7 B3 R/ `5 }% {3 j
- importPackage (java.awt);3 n4 K$ s+ @7 z6 @4 F
5 |/ ]3 W# K9 I) I! t- include(Resources.id("mtrsteamloco:library/code/face.js"));1 u$ P4 G6 b6 K |# T+ c
- . H, A9 B7 e& M7 D8 }
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: i* H7 `. }2 J1 I }
, `" `4 @4 C* L- t% s$ v; w- function getW(str, font) {+ V' J0 `, ?3 `: P% k
- let frc = Resources.getFontRenderContext();
2 t G8 k" g1 Z' e* e - bounds = font.getStringBounds(str, frc);' v) r7 h7 X! ?3 Q
- return Math.ceil(bounds.getWidth());
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. I8 W2 t0 H/ m- da = (g) => {//底图绘制7 b7 l% `9 m3 m) g
- g.setColor(Color.BLACK);
, I( w8 v! N% o4 N2 R* q - g.fillRect(0, 0, 400, 400);5 @3 X* _4 d" w+ _2 T& O( {8 f
- }
1 i6 {* j+ Q+ l& R- L
0 Z4 D v) g4 I# |" W `* o- db = (g) => {//上层绘制
5 F3 }$ {6 n* ~7 Z - g.setColor(Color.WHITE);
% v& f) r: r, i - g.fillRect(0, 0, 400, 400);! b. _, Y/ E# g
- g.setColor(Color.RED);/ L/ @" Q. t3 W9 z/ G/ _
- g.setFont(font0);% p m- V) J' e7 \/ }
- let str = "晴纱是男娘";" ^( m- K+ R; `" O8 R' r/ P+ N& x
- let ww = 400;
B, q# p ~: H; V! u/ p - let w = getW(str, font0);
+ v- C/ o! N' J - g.drawString(str, ww / 2 - w / 2, 200);& J! H' g; N' _7 _
- }
) p' {- A8 o/ O* Z4 I/ M
+ d1 d+ j9 Q. R: G; }+ D( Q- const mat = new Matrices();
" p1 m% i3 g# f0 o9 A9 L/ d) f8 R - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {- W. r$ G% p# v
- let info = {
4 n4 B8 d: ^6 r" F; Y+ ` - ctx: ctx,
# B* ^. J3 {) Z, n1 m2 @ - isTrain: false,
w8 J1 }- ?! C3 o - matrices: [mat],
1 U/ v' m9 z' o. K" m/ V0 k - texture: [400, 400],
& _, p8 T: V8 b- y - model: {% o' L3 ~0 f4 ]9 Y% [+ D
- renderType: "light",
8 o& X$ X% S O3 J+ l - size: [1, 1],5 W! v: R" m5 D
- uvSize: [1, 1]
. c* p3 Y1 ]7 l: _1 w b - }, P# c$ d5 X ]$ P( q9 u
- }4 Z9 }% P, V" C5 c0 J
- let f = new Face(info);
7 a- c( r& k& Z6 J( p8 b; y; D& N# r - state.f = f;
; B5 A* G' @9 o - $ t* ^& D% E7 [- _
- let t = f.texture;
6 U% {' g1 O# A3 [2 R# I" [ - let g = t.graphics;
0 ], e* G( }+ c+ j" r& C( w" u/ H - state.running = true;. l7 H6 m( m% `: m" i5 w
- let fps = 24;! V- c1 n1 C% Y7 X0 s1 l
- da(g);//绘制底图
; B% Q4 H6 ?$ i! M$ Q; T - t.upload();
. U% u" @: v) Y6 s/ F - let k = 0;
& T' p2 H% K7 {& \2 }9 ~3 U - let ti = Date.now();
8 n+ i# S) Q! \% S( K - let rt = 0;, r' u: o7 Q3 f+ P+ o9 W
- smooth = (k, v) => {// 平滑变化
, K! j4 P/ Z3 q& D: U - if (v > k) return k;
2 C2 [, ?& T' @2 q. Y$ h; y) P - if (k < 0) return 0;# ^6 J$ `; e" l* }( P" E
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! U9 e8 l* k9 j, T9 \ - }
8 \" B. ^6 N3 O7 n2 N* s - run = () => {// 新线程
7 t5 G2 y. c( D4 ` - let id = Thread.currentThread().getId();
3 m2 z4 U( Y, R5 I" ^! \ - print("Thread start:" + id);
9 ?1 ], ^2 z* m( I - while (state.running) {8 w* ?/ c4 t3 e; D$ c
- try {$ N9 p/ ^: V, g9 F' e7 c
- k += (Date.now() - ti) / 1000 * 0.2;( U8 o/ _6 H G3 C2 t& ]4 J
- ti = Date.now();
8 ]+ L; T0 A) J! W - if (k > 1.5) {
3 x& X8 D9 g. N - k = 0;
$ p- Q2 X& C- ]$ o C - } w1 f( M# \5 O& l; K' d- a" L
- setComp(g, 1); ^- G: h4 Z Y. }" p0 g
- da(g);
5 @5 J; K8 x% n3 [6 f - let kk = smooth(1, k);//平滑切换透明度+ p9 s& _+ O( i3 g1 j9 M7 X' V
- setComp(g, kk);2 c4 F$ l6 h0 g4 y8 f7 Q1 ^
- db(g);0 T' e! \4 J6 e8 E* h' @
- t.upload();5 l- Z7 v* E8 p$ k; u
- ctx.setDebugInfo("rt" ,Date.now() - ti);
" X+ N( {/ v8 j2 J2 @( x - ctx.setDebugInfo("k", k); n" Z& C/ U- h9 G1 K
- ctx.setDebugInfo("sm", kk);
& c; w8 W A* I( { - rt = Date.now() - ti;
2 Q9 I! W9 G. E0 D' z - Thread.sleep(ck(rt - 1000 / fps));2 O" x. e% ~4 L: u
- ctx.setDebugInfo("error", 0)
) i3 B( d2 K; P9 J! s- P3 _ - } catch (e) {
( V: \8 \& _; C$ ^1 F% J - ctx.setDebugInfo("error", e);# k& @9 H7 L! u* v& R) {
- }
- j4 ] Y! d+ `/ i/ [( f - }
9 u$ [ j! p* }6 ^( C" M - print("Thread end:" + id);1 h6 E3 V7 J; P; j1 [, W7 g+ K
- }1 M$ w% [7 y R6 B; `
- let th = new Thread(run, "qiehuan");
$ W8 Q) F! ^ ` - th.start();
8 A) w6 }& q4 Q: e/ m9 _, g - }
& s3 a; X2 y: h+ l' `1 K - 9 i, F+ B, P- C9 \
- function render(ctx, state, entity) {6 R/ j' L! `! f4 R& i3 u
- state.f.tick();: C) A+ [+ b7 M$ L, {2 h7 P6 u/ s
- }
# w' D5 K4 j; p: h. {9 m, D - : l _0 n5 _! Y
- function dispose(ctx, state, entity) {
% g( T. Q a0 t- d - print("Dispose");
5 [2 {* G' b3 G U2 l( c' w - state.running = false;6 d X, o. s+ S) [& U' }6 q8 f7 i
- state.f.close(); h; [3 g9 G+ A! h9 V' @7 H$ x
- }' M- J$ S6 v' f& R
- # D6 @8 s4 c9 r
- function setComp(g, value) {& j+ \0 s9 w3 s4 e: r0 w N a
- g.setComposite(AlphaComposite.SrcOver.derive(value));
( x2 {( G) H% h( u/ i, l/ L) O. ^ - }
复制代码 ! F* c. d3 n& 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。7 D( M! d; X" K! z
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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)
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