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: E9 j% b! r3 j8 u# C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。( |" D' b V2 }( z- j
- importPackage (java.lang);6 @% i2 h6 i6 ^9 ]+ z4 h. L
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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# N' r9 W2 K0 v& v: D1 F0 B. b- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 d3 ]( b" H6 l |# R5 X
. h# h2 {* o, x. u- function getW(str, font) {
@" ?7 j1 M$ g3 s9 p - let frc = Resources.getFontRenderContext();
$ _8 ]- p/ j" J, ]% ?* C6 d G - bounds = font.getStringBounds(str, frc);
7 H: a8 C% l7 v6 k5 e. s1 j* ^* z - return Math.ceil(bounds.getWidth());
8 g" Z9 Q1 N3 p1 i' r. `/ I4 N - }
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: l4 s: b- u! C5 q* @( m- w7 p- da = (g) => {//底图绘制
" _' V; [& {: T* z- U - g.setColor(Color.BLACK);
7 j- v2 q8 W* H) }/ F: A - g.fillRect(0, 0, 400, 400);
- b) F! v" K4 N* b, y6 h - }. v" P9 l! n' U0 H" L) x' X
- + p0 w) M9 ]% {( g
- db = (g) => {//上层绘制/ n; l" m* J8 M& H& B
- g.setColor(Color.WHITE);
* V i( r! `9 u# n% v: ` - g.fillRect(0, 0, 400, 400);; U3 U9 J7 w3 J1 i' u
- g.setColor(Color.RED);
1 H! }. I& y3 w$ P1 D. k2 A - g.setFont(font0);& `7 i- P* b9 s0 z3 L# K+ @, c
- let str = "晴纱是男娘";: h) ~; L" x. V- o5 x1 O
- let ww = 400;
8 S$ o: U; s- p; M4 v) l) ~ - let w = getW(str, font0);
7 v+ ?! U" D/ B8 w, @, f- ] - g.drawString(str, ww / 2 - w / 2, 200);
/ V; g/ c- w: i6 N - }
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9 i, @* K, ?' z$ F* |. @- const mat = new Matrices();$ K/ o4 M; h" n7 f9 @/ C% A8 ?) y
- mat.translate(0, 0.5, 0);7 v4 t/ w/ c* Z$ d4 @! Q* K" g4 j
; X: N2 R6 P- b2 x5 g- function create(ctx, state, entity) {* n; ]& v7 J5 y' o
- let info = {
7 T- {* s8 S+ M! k! }- @ - ctx: ctx,! N' P' F: R# R# s' D( a
- isTrain: false,4 s% e k4 W5 x: b, v. H. w
- matrices: [mat], J$ L6 u2 }" J: j; r
- texture: [400, 400]," f$ [. m# }& y/ y* x4 J) S; v' [
- model: {, u7 p+ T. l, t9 ^; ?( I" U& T2 R
- renderType: "light",
( k h; Z$ B- G2 _5 L - size: [1, 1],% q0 I1 a6 B) n) y) m& x6 A+ y
- uvSize: [1, 1]4 Q8 R, r: H8 [5 c" }- h
- }
, ]2 J& D6 @( G" T - }
/ o9 U5 L3 s; a0 n l: ^ - let f = new Face(info);
. }7 X% y1 ?& z2 Q5 e# g4 n& o* k - state.f = f;
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- let t = f.texture;
, D: e' N: H. K }; V2 O7 n - let g = t.graphics;
$ p* U) Q' g3 f1 u8 E7 _* X - state.running = true;
9 |( \, Y9 Q- V( _4 l2 y) x - let fps = 24;
0 |" L9 M1 p0 U4 l7 O - da(g);//绘制底图
. v* m5 x% T/ H' `! V9 B5 L7 ^# |2 y - t.upload();
& L! S+ o* j( |# `% C - let k = 0;
1 O2 e( A9 }: f- X4 B - let ti = Date.now();
! X9 ]. q. Y, v* m - let rt = 0;! G3 v. m9 j2 U+ |7 _: o
- smooth = (k, v) => {// 平滑变化% [ r) h+ q3 ]* \; y
- if (v > k) return k;
1 h/ B/ q" A& D0 g1 ` - if (k < 0) return 0;
- @: N% L. {1 j. Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: k+ p0 K% s0 C) B8 p
- }
) b6 R0 c- h% X6 l& Y& @- Z - run = () => {// 新线程
8 W' @3 P+ V1 l: Y' i" O1 f0 ] - let id = Thread.currentThread().getId();2 C$ E" @0 A+ ?
- print("Thread start:" + id); E3 R( s, W8 ~4 G
- while (state.running) {# L! n0 r( y0 f5 P+ n
- try {
3 \% B2 e1 w0 L& V3 t- A* n: X - k += (Date.now() - ti) / 1000 * 0.2;2 t0 z1 O* ~' _- u& x( n2 ]' i
- ti = Date.now();
+ c; X7 h8 s. G& j8 V) K. { - if (k > 1.5) {
$ A/ h/ i- z0 G% d2 j. n" { y - k = 0;
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- setComp(g, 1);
4 U$ Y4 ~# f F* l- G+ n - da(g);
* @3 H- G0 R) ?' D/ o! Z - let kk = smooth(1, k);//平滑切换透明度$ _/ z \; R$ R0 ?
- setComp(g, kk);
8 l0 l. u7 E3 m' R% g, v - db(g);3 `' t9 Z) F8 R; }
- t.upload();+ n' X) ]: y, B1 {. i6 S
- ctx.setDebugInfo("rt" ,Date.now() - ti);- ?: I5 F7 |( m& @% H1 {
- ctx.setDebugInfo("k", k);
5 p* r8 G; m" ^9 U$ r - ctx.setDebugInfo("sm", kk);
" X& l* l# a+ n- h/ B - rt = Date.now() - ti;/ l$ N9 M, N# S2 D+ l
- Thread.sleep(ck(rt - 1000 / fps));
5 e9 z0 b- a7 U! D& m: m - ctx.setDebugInfo("error", 0)' Y( u% }- f: R
- } catch (e) {
2 u+ I Z, C2 f# l6 T) U8 j - ctx.setDebugInfo("error", e);
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- }
* _- Q' j& Z k3 m- X- ` - print("Thread end:" + id);% J7 \: l" @ q2 K4 M/ [, [
- }' T" B- g5 U7 e6 A$ L3 [9 x/ o+ l
- let th = new Thread(run, "qiehuan");6 h( ^/ D% [6 ?3 }
- th.start();
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- + o: w* o" ~ ?, ?
- function render(ctx, state, entity) {- Z/ u6 x5 p. v J n
- state.f.tick();
8 T: v* \& j" P% s - }
8 Q, {" ?; p. n- y+ d - / C3 q. i7 r4 W. U8 E- }
- function dispose(ctx, state, entity) {
1 M9 M! N9 X0 L5 J - print("Dispose");
; \; q/ I4 v# i8 k. z/ e - state.running = false;
" m( b [9 h8 r: k8 w* `2 L: { - state.f.close();
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; C0 B$ C$ {# x4 p/ Z- function setComp(g, value) {
: ^& a2 _, b8 j5 P% h3 o - g.setComposite(AlphaComposite.SrcOver.derive(value));
* H' C$ P. A& N* `. U- F - }
复制代码 " ?" c$ [! f8 A4 h: X0 {" X
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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! C7 @( b a" m5 l f顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)4 c# w9 S$ v/ c
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