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3 q( y6 b$ O; L( l- }. }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。
' m1 H, e* ~: ~ t/ b/ T- importPackage (java.lang);7 G0 ]% ^) \( p* b+ \- z* g% G
- importPackage (java.awt);4 e) V4 u3 J5 w$ [+ e
; }- h+ w. {" ^, R. R1 |- include(Resources.id("mtrsteamloco:library/code/face.js"));
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7 d3 O7 _& z; w1 J' t2 u) V- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 y! Z1 c4 I8 f4 g6 d
- * [/ ]+ n5 k* n( j+ S! w, q) ~
- function getW(str, font) {' I# I8 t2 S% y6 E+ U6 M- [5 Y
- let frc = Resources.getFontRenderContext();
4 ] p' V9 D R* z: ]+ [ - bounds = font.getStringBounds(str, frc);
! }0 V5 E6 Y5 Z4 `4 b7 r - return Math.ceil(bounds.getWidth());$ t9 v" Q7 H/ C$ ^+ P( [3 W
- }
! P$ X/ u1 i& [ \/ V8 s: Y; w F - % v# z8 J; F k4 ]
- da = (g) => {//底图绘制# J$ ?% T- R0 o5 I! s
- g.setColor(Color.BLACK);
/ K+ K* {) j7 w$ u1 A( U( p3 m5 b, n - g.fillRect(0, 0, 400, 400);
0 p' Q6 C* x. N" Q8 m3 w - }
[ _ a) ~! K/ x" s @
4 A1 A4 ]) {2 d+ y" T! L# C- db = (g) => {//上层绘制0 O0 G+ t2 g6 R, x* L
- g.setColor(Color.WHITE);& M8 h$ H( {1 r; {
- g.fillRect(0, 0, 400, 400);$ ^ D2 K; P" |! n, A, n0 q- t
- g.setColor(Color.RED);
# n+ ]8 w# q8 P6 `, C; ~/ J; _ - g.setFont(font0);- g; U0 ^& Q$ }1 N" w( w* I
- let str = "晴纱是男娘";; D$ @4 ^1 H9 _! n
- let ww = 400;
4 ^3 v4 E3 z; n b6 J' K - let w = getW(str, font0);8 z/ U* R) T! F6 z, t
- g.drawString(str, ww / 2 - w / 2, 200);
1 c, B% F8 r, ?, u1 l' V - }3 `- r2 R% ^/ |$ }# E$ r
+ J0 a* j( m! @- const mat = new Matrices();+ A1 N1 ?! B2 p# _% ?; G0 h' t
- mat.translate(0, 0.5, 0);( D: b* S- F) h+ `" s) ^& |3 \
- 6 ~" o" I7 R/ M$ ^6 o
- function create(ctx, state, entity) {7 T3 m" S9 c% f' a3 o' v
- let info = { W* }$ P8 v8 f& A: s
- ctx: ctx,
- c* K0 R* w/ G2 D/ E7 K - isTrain: false,3 T1 Y% w+ y+ _4 Y2 R) W
- matrices: [mat],
. e2 f! q$ w( F P: r - texture: [400, 400],1 o3 z+ i) v2 \3 }0 P( [' T
- model: {* l/ J' r/ ?' d- f
- renderType: "light",0 C( `/ ?+ H9 w$ I
- size: [1, 1],
, {# \" ]3 m; x7 i" q6 | - uvSize: [1, 1]! E5 g* D2 G1 _3 }$ t
- }
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- let f = new Face(info);0 Z" [) B# t" ~" f$ C: Y7 p
- state.f = f;
/ B6 R+ e- u& r3 E! A; f6 x - 1 N9 s1 X" `3 N+ H F/ E7 y' S8 O4 D
- let t = f.texture;; A" w/ u& H8 g0 j4 Z G
- let g = t.graphics;
. G' z6 }5 E/ b - state.running = true;9 I, V/ g. v4 x. c, j1 t
- let fps = 24;
4 M! l5 S- M1 @% }- N. ] - da(g);//绘制底图% J! x1 ]: K$ y- D4 T" Z( s7 j" W
- t.upload();1 `8 N1 U! r4 c8 O
- let k = 0;
/ ^- O0 n3 [4 F. M- [ - let ti = Date.now();0 b" z, `1 n. ~/ n: A8 I/ y
- let rt = 0;4 ~) ]1 M) l6 { v9 R
- smooth = (k, v) => {// 平滑变化& D* o, @7 p9 O2 [
- if (v > k) return k;
5 C6 _; v& B1 P1 {! j - if (k < 0) return 0;
* M. n3 |* i# Z+ y) o4 I4 r - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 X4 @9 J. w( r
- }
1 n8 F3 q% d2 [- S0 } u' D ] - run = () => {// 新线程
- n- v3 z+ x) F; @5 j" B# S2 E - let id = Thread.currentThread().getId();, n/ p+ y* P, y5 u# _4 Y" g) ]6 k) B
- print("Thread start:" + id);
" T, G0 o) M/ m4 Q% n: _ - while (state.running) {9 t6 E( W0 ?* q: \7 F7 C
- try {
* u/ o( ^3 Y9 ^7 r - k += (Date.now() - ti) / 1000 * 0.2;
: c0 a# U+ | }! R% K - ti = Date.now();- Q2 x; n s& l% w' k) [4 C0 ?
- if (k > 1.5) {. t) i, O/ \, ]8 W
- k = 0;( T& {7 w2 `3 `. B
- }
d$ g% Y' Z |- K" _( a - setComp(g, 1);
5 Y. H- r. d3 C3 E1 ]7 z( w' v - da(g);
+ s( Z3 v: c9 H0 z* D# @ - let kk = smooth(1, k);//平滑切换透明度# U# N- h9 Z1 s0 q" }! z$ N
- setComp(g, kk);; q7 S& u6 j' v! G# X
- db(g);
+ v3 ]. n& e. U# U/ U4 d% M0 G: T" } - t.upload();
8 W* j% v9 B8 i - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 S! p5 ~. A9 q1 p' L9 {* b s - ctx.setDebugInfo("k", k);
7 \. u$ x' `1 o* I n7 R - ctx.setDebugInfo("sm", kk);
9 X0 \4 H6 ~( J; F5 Z" \; K - rt = Date.now() - ti;+ H, e9 Y% H, ` e* s+ G& q$ O
- Thread.sleep(ck(rt - 1000 / fps));& U9 r6 u( v% C- |, ?! _$ [: q- l
- ctx.setDebugInfo("error", 0)6 r# h/ ]1 \' E$ I- _$ L# i9 t' i
- } catch (e) {9 ?( l& A7 N7 r( C' P
- ctx.setDebugInfo("error", e);! r) d; Y1 [5 E% q! Y/ A/ t( u
- }) w8 E& f: l8 I/ N9 `9 X6 Y
- }
& } |' M0 O) q - print("Thread end:" + id);* \, p# z. H+ v
- }2 \( g) \2 o4 Z% `$ U
- let th = new Thread(run, "qiehuan");
1 T w) ^) U% {5 J* X; V$ s - th.start();+ G6 D, t4 B8 A$ _- [# P1 i5 N
- }6 B0 }* I) E+ A. H6 |; |) T
; n. t5 X. r3 s3 _! F1 H- M- function render(ctx, state, entity) {5 d4 h2 N V9 w
- state.f.tick();
6 _2 e8 P7 v/ a1 x7 ~) \ - }( O+ E& w$ g' Q6 h
- " C$ i# g' E T' p1 R7 W) ^
- function dispose(ctx, state, entity) {
5 Q+ t1 P0 X6 Z" j4 h# ~ - print("Dispose");# d2 K3 n9 N0 D) p/ E5 D5 I" K
- state.running = false;( n& R. J7 V" \
- state.f.close();
7 W' @ @" l7 K+ Z. g - }6 @5 p( S! p$ ]/ N
9 z' b; V' |8 u! J' E/ U& Q- function setComp(g, value) {
: l4 V1 o6 K. |, z$ } - g.setComposite(AlphaComposite.SrcOver.derive(value));
+ E) s. l( U, e% }) R+ d - }
复制代码
, I8 ^, c) y/ t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。* t# S1 J0 P2 T
+ l# X: b, t) k) u: |0 h+ f
- G8 w$ h& ~9 o1 O9 t- z: O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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