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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。
3 W C, t0 d. s x1 I. k- importPackage (java.lang);
. f0 a0 c) G5 I - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));# J6 h. w4 b" c: H
7 V$ X0 }: ]2 n6 O, Y7 r# S- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ x- r* h% J3 K& a+ X: K( k
- 7 S6 m4 y) L7 q. s. E$ x0 Q2 e
- function getW(str, font) {
' J. b5 C+ w; H% ?* q6 j& S, p - let frc = Resources.getFontRenderContext();" E1 x0 P+ `( l' C a' b
- bounds = font.getStringBounds(str, frc);. \; q+ W, V9 d
- return Math.ceil(bounds.getWidth());
& I7 |( f. \; E. o - }# z x) C: W9 k# a( ?! l5 k. \
' W: A8 w9 w' M3 a# z- da = (g) => {//底图绘制
) R, R, b7 C% r( x' b: s5 k6 q - g.setColor(Color.BLACK);2 G& W% |3 z: |0 F, W/ l
- g.fillRect(0, 0, 400, 400);
" _7 ~" n X( F1 Y - }
6 t9 y; P6 Z, w) C# d7 z: f
^- U4 y7 K b- db = (g) => {//上层绘制
4 x& p9 B5 G# s( Y - g.setColor(Color.WHITE);6 v; n4 J6 O% K: h8 p. y, i
- g.fillRect(0, 0, 400, 400);/ e/ j2 Q" u V2 v
- g.setColor(Color.RED);
9 c+ Q6 f: _) E; D/ I - g.setFont(font0);
& p$ [- l3 [! S4 [, I3 _2 | - let str = "晴纱是男娘";
: g* H& f# U- A7 x+ m* N - let ww = 400;
V5 _0 Z6 u3 d" { - let w = getW(str, font0);
# D" T- X+ r+ I$ M) @% ~0 {0 z* x! F - g.drawString(str, ww / 2 - w / 2, 200);
0 d7 R2 o. O7 E H. g, S - }
* s4 b% P/ {" t4 [
9 w( j# L. [: }4 F; ~8 r/ l- const mat = new Matrices();
+ G X9 t& M" ^" k% K) ^! b - mat.translate(0, 0.5, 0);1 O* D1 k4 ` N3 G
- 5 E) k# w/ f' P, W+ E
- function create(ctx, state, entity) {. g3 l# @) ^5 u& s
- let info = { W7 C/ y2 x+ C7 u. b
- ctx: ctx,
% f7 X+ z3 ~4 b( {9 H - isTrain: false,8 L3 _) M) D# }1 R: u7 H
- matrices: [mat],6 |& U; Z& A) ]/ |
- texture: [400, 400]," P+ d' y: U3 H7 b2 ~; g5 c
- model: {
9 J8 J* ?9 f( y& z' z7 b, V' N. ` - renderType: "light",
0 d2 I# m& G6 f) | - size: [1, 1],3 P3 v' \. ~) W+ ~ n
- uvSize: [1, 1]
% r5 u/ j! b9 u - }
) Q: ?; l7 m0 V8 V4 n3 u4 d - }
, _' C; m5 Z; u0 y1 ]+ Y" t6 R+ O - let f = new Face(info);
* f) ?: E) M6 J2 U% u7 z; I - state.f = f;1 U! A2 `4 c0 A8 z3 h( p- q' B$ }
' z' s/ G6 l' \. Z6 E0 q- let t = f.texture;3 U K/ @9 W7 j) M' |
- let g = t.graphics;
2 p2 y+ o b% x6 W) d* d - state.running = true;
' |7 [; b1 X% m5 z) ~' g - let fps = 24;& e; m/ b" P* [0 [' f' s' @) ^
- da(g);//绘制底图7 r0 u! z3 ^ ~1 t+ Z, X/ S$ C2 F
- t.upload();1 Y+ q; j/ f8 L! u1 Y6 O
- let k = 0;
5 w' L3 I% V* p - let ti = Date.now();
# D: H# R7 R M* o - let rt = 0;- Q ?/ c7 h$ a$ G
- smooth = (k, v) => {// 平滑变化
; s" ~" [; f" {& {8 `* F: T - if (v > k) return k;
4 Y0 H6 N6 U6 i$ _% B - if (k < 0) return 0;% L5 y9 }4 \; ?! K7 \' P" ^
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! ^( g+ w( e8 W. k0 j) [' U2 o - }
' b. S; P) a- r4 X c - run = () => {// 新线程
. h' v+ ~4 K) d - let id = Thread.currentThread().getId();
9 |+ a$ a& j% {! G& N4 e - print("Thread start:" + id);! E Y6 n& T' {; k% h2 P
- while (state.running) {( L: {9 ~& m# w$ D' _5 P
- try {
, d/ ?+ {# J' w& Y# h+ c I - k += (Date.now() - ti) / 1000 * 0.2;+ |1 u% J0 D( |2 b
- ti = Date.now();; W3 A* |+ M; |" i5 ~, e3 R
- if (k > 1.5) {7 ^7 z: G/ c9 D9 S/ k
- k = 0;
# s1 r3 h( t2 E! p( p2 s - }
. x+ J7 }# K+ Y5 w3 x% n0 j% g# E - setComp(g, 1);
) ?' a4 _. j+ j6 z - da(g);
1 b! k9 d! i6 i" g, c7 W - let kk = smooth(1, k);//平滑切换透明度$ q& e5 ~" W6 u+ F8 ~% l @- o
- setComp(g, kk);
$ g( N7 p3 ^+ c- N8 G! }9 z: ~+ |3 [2 C - db(g);
# T! X' s( }& G; G - t.upload();
: _$ b' B8 B4 V: }6 l+ E0 F& H - ctx.setDebugInfo("rt" ,Date.now() - ti);
5 p' d) G" A) L( b) f - ctx.setDebugInfo("k", k);
% b; h e. h, D4 c, ^' {" l - ctx.setDebugInfo("sm", kk);
% U* m* O4 l3 f - rt = Date.now() - ti;. p6 [2 k- H6 i. R: P# r# M
- Thread.sleep(ck(rt - 1000 / fps));
% g* ~( d: w. S; H! b4 h - ctx.setDebugInfo("error", 0)
& f: O4 Y( F5 z/ R - } catch (e) {
+ V% G& @! w4 e& f - ctx.setDebugInfo("error", e);" k+ K6 H0 r0 X, p! U4 b
- }
% P* J( J& A: |9 |& ?) i - }
" K; L# m0 I$ m% {6 w! X- S - print("Thread end:" + id); r9 c+ |7 ]' g+ X6 l( p8 j
- }2 }4 h) H8 {4 R; ?! _
- let th = new Thread(run, "qiehuan");: N+ Y; a+ L9 I7 v8 _1 N% Z
- th.start();
) K" g7 M$ r- a6 j - }
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- function render(ctx, state, entity) {' ?; [0 D0 i6 n6 H" z4 ?6 f" E# d" R
- state.f.tick();
+ z9 v5 Q! v, _* z+ _. H - }9 k- {" h& E1 k/ e" B5 u
- ! F! ?$ l* y& T" A$ V- G
- function dispose(ctx, state, entity) {
# a W# E3 s% E5 b+ M9 B& x - print("Dispose");
' O( U9 ?. u A4 T6 y% E% ~: {5 h - state.running = false;
, P2 _/ V+ i6 A$ B- d E/ B3 r8 f - state.f.close();& J" H6 T; d. H: o. |) u
- }7 }4 M. |5 k; ?+ E6 C
- % j% w7 h2 S% n0 N' p; o, ~
- function setComp(g, value) {% q( l% \ S1 [. K9 S, x
- g.setComposite(AlphaComposite.SrcOver.derive(value));
4 ]" m3 o: `+ L5 r - }
复制代码
; C& g" j/ R7 \& y# j5 W L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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( l, u: b9 t4 \4 Y% j, a3 _顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)) S9 _; |8 o- a" U1 e9 b: Z
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