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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。
" }/ w& S( L9 A4 y; A2 e, z( }- importPackage (java.lang);- e$ Z- Q" _; {5 t; N- M
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
/ B' `' x4 ~& b( ^8 u9 w - let frc = Resources.getFontRenderContext();5 c+ C i% F ^, k9 P& j
- bounds = font.getStringBounds(str, frc); N! g) v7 s/ x1 k1 J& M
- return Math.ceil(bounds.getWidth());
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- da = (g) => {//底图绘制* ?8 l7 n4 J8 L
- g.setColor(Color.BLACK);
. J4 H! w/ ?3 @0 t0 K0 P2 d' w# S - g.fillRect(0, 0, 400, 400);1 T c( ~+ ?) Y4 K' M+ ~) `& w+ u
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- ( L* a- W; P" T: S% S
- db = (g) => {//上层绘制. g/ e$ @0 ~& w& N, p) w+ V& q/ k" v
- g.setColor(Color.WHITE);
' Q2 y) e* \- [7 s - g.fillRect(0, 0, 400, 400);
" z7 F- ?" c/ x$ H! ? - g.setColor(Color.RED);6 `2 s, Z+ w5 n" C& ~
- g.setFont(font0);
4 E2 Q6 v. g3 ]' t4 x/ N7 X5 ]0 p - let str = "晴纱是男娘";
" w+ w. z0 A- J* K( A& W - let ww = 400;
. j7 @5 D: K% _" ^, j - let w = getW(str, font0);9 M1 M2 W' b! H4 n
- g.drawString(str, ww / 2 - w / 2, 200);7 p7 {# h/ B+ J6 L) d1 U, f( z
- }
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- const mat = new Matrices();& C* p- X! n2 N V- c: Y5 S) T
- mat.translate(0, 0.5, 0);! i) ~' i A& g9 O
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- function create(ctx, state, entity) {
3 i$ e$ u% {+ Z - let info = {
& ~8 }) o1 U7 o: c8 ` - ctx: ctx,
$ i/ C8 x' x; {+ ^: r - isTrain: false,
% }$ U) I+ y* Q; z, V+ c; r0 D2 G - matrices: [mat],
( w! z" ?# L+ V: O! B$ l/ t - texture: [400, 400],' [' A6 ]# B" {) R$ D7 L
- model: {; U. x" |9 y6 i% i
- renderType: "light",
& a/ ] _1 \9 f' M3 C1 o, x4 g - size: [1, 1],
9 c: {) l, S- I2 G; O1 [ - uvSize: [1, 1]
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, \; t: S z/ S" |# C1 f - }& t: z+ ?; ]# M. f" {
- let f = new Face(info);+ L) h+ a$ W+ ~. I. b h
- state.f = f;
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* d4 G& Y4 }4 s6 b- let t = f.texture;
, q0 A4 d2 t$ z- C- w" E - let g = t.graphics;& a4 j2 B% H' B) I7 E" I
- state.running = true;
$ ?" \& A; D" m; N. k7 s$ e - let fps = 24;5 B$ j0 ?6 e" _9 A' ~+ f
- da(g);//绘制底图5 _' g* s0 s" _, I3 D7 x7 \9 x" ]
- t.upload();
! w/ _ {) W, M; b6 _# U) U- | - let k = 0;
+ K+ |5 e. h% `# O - let ti = Date.now();
' Q* K* ]2 R; z4 F( b! w; o - let rt = 0;- b5 h! d" a; @" W7 z: V* A) a, r- F
- smooth = (k, v) => {// 平滑变化" |9 d a4 d3 @$ F+ p2 G6 Q
- if (v > k) return k;* S! |- p% @' q+ D* ^6 y. ^* t! X
- if (k < 0) return 0;
5 w2 Q' Y% e; H! U1 e0 [; | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( p" B5 Z* U! P$ l4 k
- }# q# z# U1 k* y1 V" j. D
- run = () => {// 新线程
+ ~( \ z# y! o6 D* C - let id = Thread.currentThread().getId();
' s/ F; T. G* {) o, x) ?7 g: K - print("Thread start:" + id);; W' f+ N' S( h0 b# d/ g
- while (state.running) {
5 U' K7 y9 E9 b" I' d1 y$ t* j7 B4 Y - try {
4 F3 X9 G! a! p# @ - k += (Date.now() - ti) / 1000 * 0.2;
; M: W, n$ @+ V/ _& t# ?4 v - ti = Date.now();
7 _) g8 x3 B6 d4 O - if (k > 1.5) {
: B+ A# d9 z# g - k = 0;$ I! u6 V6 ?/ G, p
- }
* x4 b! G4 G9 D: a# J! [$ _. a - setComp(g, 1);1 I$ k, j0 K X
- da(g);6 l8 c1 V# w3 v* R% b- }
- let kk = smooth(1, k);//平滑切换透明度
* F( x- B7 w2 k2 q - setComp(g, kk);
4 t# d) t9 j) S - db(g);. I- P1 F2 _) {
- t.upload();
2 [" U7 m1 t9 N7 t h - ctx.setDebugInfo("rt" ,Date.now() - ti);
+ ? z, J h3 Z - ctx.setDebugInfo("k", k);
! S! B% D/ A7 }( ?5 ` - ctx.setDebugInfo("sm", kk);
& R1 `' j% ]( S- @1 g - rt = Date.now() - ti;& n+ I& j% q1 ?0 v' C$ Z3 G; i
- Thread.sleep(ck(rt - 1000 / fps));
$ ?, `& M! ^1 g" U9 E2 j3 A4 W - ctx.setDebugInfo("error", 0)
! M" n2 w8 I3 q& G, G' u2 k - } catch (e) {
o* j2 J4 [ d' R; E; w - ctx.setDebugInfo("error", e);* T0 }6 H0 B4 v! [0 M5 U
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- }. [3 x. U2 K8 @! Y4 _
- print("Thread end:" + id);
4 x, [- K' W* D8 Z - }
$ J) F8 y' L ]+ d - let th = new Thread(run, "qiehuan");
5 a# o" B9 L: ] - th.start();
) D3 | o( f. N4 ~7 E6 n | - }
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- function render(ctx, state, entity) {; K! P' ~4 Q* y
- state.f.tick();
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- % M8 @% y5 ~3 H
- function dispose(ctx, state, entity) {) p1 M: W2 a8 G$ n# J \- @
- print("Dispose");; \: a! b- S) o1 S2 _1 `
- state.running = false;1 a+ X1 s, G$ ^( u- R- r
- state.f.close();
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- function setComp(g, value) {
: O! M$ J8 W: O h! h3 V - g.setComposite(AlphaComposite.SrcOver.derive(value));
5 U) y. e' I7 a6 _ - }
复制代码 ! B! |; i8 M) k/ z+ q* l" 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。
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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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