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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。" W0 ^2 r' Z, m4 t2 G
- importPackage (java.lang);5 T' K9 R! d$ L( i
- importPackage (java.awt);! }4 v9 _4 p5 Y2 H3 ]( `
- ! t; U3 \* U* y' _ S |
- 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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y7 {0 H/ h g: W/ }- function getW(str, font) {. D% i; Y6 U, Q X. i+ u
- let frc = Resources.getFontRenderContext();# s* X2 [# g" N1 g
- bounds = font.getStringBounds(str, frc);
. t% ~, [' Z2 X; ] f4 p - return Math.ceil(bounds.getWidth());
5 T1 ?+ M2 |% ~ - }
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! X% o" @4 F* U0 K7 e- da = (g) => {//底图绘制
: s* o" p3 S& x! k1 e, i - g.setColor(Color.BLACK);
' C1 _/ X/ f4 ?# n" }, f - g.fillRect(0, 0, 400, 400);
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+ U/ D' x/ D3 i4 s" ?' R- db = (g) => {//上层绘制
2 k( Z8 t8 \" _ w( Q. W' H - g.setColor(Color.WHITE);+ n8 I: R6 d1 A( {$ g+ w5 T
- g.fillRect(0, 0, 400, 400);
6 ?8 Z6 t8 a$ O; _9 g( p" [. ? - g.setColor(Color.RED);. f: \ A# _8 O6 V2 R+ ]' | m' n3 a: {
- g.setFont(font0);
0 U. X. |0 W( b5 V1 m - let str = "晴纱是男娘";
3 Q. ?* O6 z8 P( a3 _3 ? - let ww = 400;# l2 _1 e- M2 ~/ w( @2 p
- let w = getW(str, font0);( |& j3 n5 q9 D" v) G1 L; e& l
- g.drawString(str, ww / 2 - w / 2, 200);
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- . a. Y3 y0 E6 E. ~
- const mat = new Matrices();2 u- z% R: Q0 D' B1 R# x0 R
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
# L( `! M4 V; @% h& M- B - let info = {7 m0 O6 _' D R9 o# P( o
- ctx: ctx,0 p( w5 n, g3 |" \3 e" r
- isTrain: false,
5 O# l1 X8 k% y# m - matrices: [mat],0 r7 Q6 x6 x z' V/ L1 P
- texture: [400, 400],# d# [9 V- y7 }% @4 s0 C( g
- model: {5 y, f; g% }% q' Z+ F1 P
- renderType: "light",
3 N9 W' G3 @- y! n' d - size: [1, 1],
; h x, O r5 N$ R) V5 X1 \! ~2 r7 [, _- v - uvSize: [1, 1]7 f+ j# u* B4 r5 z: l, h" Y, O
- }
. I/ a* D3 U# f5 f6 P2 ]; N1 | - }
" R' T- o+ B/ Z8 G+ s3 K) H6 | - let f = new Face(info);
, _# T* w8 Y# ]( H - state.f = f;
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- let t = f.texture;+ C6 y7 _! E. o9 X8 ~: @; F
- let g = t.graphics; a, J: V6 S7 w) T" z0 X: K
- state.running = true;5 P+ h$ W$ c Q9 R! f
- let fps = 24;% }8 l- c: c" c" { F! H- t- o2 R# A* ?
- da(g);//绘制底图: ~- w. q" X( D2 y- j
- t.upload();
2 d9 P$ k( \, P$ s7 X - let k = 0;- c: {" s0 n. p, _1 c# E2 C
- let ti = Date.now();+ j* G9 B, G5 A8 `0 q: V0 R! m
- let rt = 0;
0 ], C0 T; g9 ^ - smooth = (k, v) => {// 平滑变化
9 H- ~% ]5 P8 W& u9 r - if (v > k) return k;) r0 K' @7 u& M, o! W3 P
- if (k < 0) return 0;
2 s$ P! I9 C/ h - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 w- d7 t7 n; P
- }
0 y5 f" K( K3 w - run = () => {// 新线程
0 u9 o0 {( M+ _) d4 z - let id = Thread.currentThread().getId();' O) S# F; K" g% p( `4 ]! T" T
- print("Thread start:" + id);! R( p1 [& S5 f- f
- while (state.running) {1 h( ]; C/ P, n) _
- try {
2 Y h. Z h! x - k += (Date.now() - ti) / 1000 * 0.2;
9 ]/ Q; q3 i: F9 G% ]" \1 a" x8 x7 } - ti = Date.now();
7 }9 `6 \& ^2 x; v - if (k > 1.5) {% V ]/ e+ j. i7 a; q( Q. x
- k = 0;
; h/ ~' N9 M& o - }
9 G. U) e" W; I, d- b+ [- u- p4 | - setComp(g, 1);
) X% K3 ^/ ?) V: @ - da(g);/ I2 ^% `! A3 X
- let kk = smooth(1, k);//平滑切换透明度$ P+ n) V c! b& F
- setComp(g, kk);
; c# D* C$ Y% U2 L - db(g);
n- a* D$ o: ^) N6 p$ V - t.upload();6 J5 E& a/ ]! p1 E( i) I. U: X
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 z. i6 V0 V- A9 m+ o1 X- \% |8 d0 U
- ctx.setDebugInfo("k", k);$ y4 p" B. H1 _: O) o! }) m
- ctx.setDebugInfo("sm", kk);
' y# A/ P+ t4 h, }) ~7 r - rt = Date.now() - ti;+ A8 C3 ` ~9 y- l
- Thread.sleep(ck(rt - 1000 / fps));& z B1 p) `) C) j+ N8 s
- ctx.setDebugInfo("error", 0)
# B' s8 a; S2 l% y - } catch (e) {; }$ t' ]9 D9 Z4 U' v
- ctx.setDebugInfo("error", e);6 ~( y- T- ]( g; z
- }# d7 ~5 a: O0 U
- }6 y3 M* C7 s! Q, g7 N/ n
- print("Thread end:" + id);9 G' o( |; {6 X
- }! b/ k1 Q7 j: o' ?) {
- let th = new Thread(run, "qiehuan");
7 D' T. T8 T2 G% x8 H - th.start();& y: U) \% p7 F( \4 @: a4 X
- }' A0 ~) f9 i0 r5 }6 h, J* Y; c
( ?% P/ V3 b! x1 y( R3 @( U- function render(ctx, state, entity) {
/ ~+ ~# o7 d2 [ \ - state.f.tick();7 t0 B7 u( ? s9 s# s* T
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. A6 w! W. C5 i& f5 w. U- function dispose(ctx, state, entity) {
# K5 O5 u2 N1 x2 c- ?0 b - print("Dispose");
' d, L% ]+ u, J- x e2 T" V$ K1 t* e* Y! R - state.running = false;) w, z, J4 l. l! \! W
- state.f.close();
7 }9 J3 L% @7 Q& k) d% m - }
) p& V+ t( O/ i8 r
9 K3 e3 v6 y0 y4 b V" O- function setComp(g, value) {3 o3 L( K! D; T% e2 n- V6 Q
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 z" ?& \6 |% [
- }
复制代码 ' {( T+ U, N. |9 b) D8 F
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) N8 c% P8 F) w( X+ \5 x6 }' p
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