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( O3 ^4 Q2 J$ ^$ a2 j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。' ~$ S" U8 p/ t$ v2 }1 F/ q! U
- importPackage (java.lang);
9 W9 L$ m( H _; O/ V9 }+ \ - importPackage (java.awt);2 ?( A8 q2 Q5 b' M. q8 A0 i/ ~
5 x) X& @/ [1 J% T, C) J- include(Resources.id("mtrsteamloco:library/code/face.js"));
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* e9 L+ [7 @; ], ?& Y a8 o% J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 n; w2 w- f- x
- J7 P! Y2 P9 d( v
- function getW(str, font) {
3 Z* M9 F# Z4 g - let frc = Resources.getFontRenderContext();- E, w! p3 Z _2 ]1 ?
- bounds = font.getStringBounds(str, frc);5 P! X. @# V) i7 S
- return Math.ceil(bounds.getWidth());
/ _$ {0 O3 b( J2 x - }
1 G6 c! B% n6 l2 G1 @, E
3 z5 R1 u7 m4 J% l' t9 F# Z& ?! z% G- da = (g) => {//底图绘制 D" j$ Q) r& \6 s& ?5 M. L
- g.setColor(Color.BLACK);
h& U- `8 X1 h( k7 D8 U - g.fillRect(0, 0, 400, 400);1 u, Y% |1 a: q2 B- q
- }
! V# s6 K, ]. w, D) I
0 d2 x; s% g0 S2 ^7 a9 g- db = (g) => {//上层绘制
M+ |6 t. E/ G - g.setColor(Color.WHITE);6 }: L! _8 n* ~! _
- g.fillRect(0, 0, 400, 400);0 J( b1 A+ v$ p0 a: n# l. w/ [
- g.setColor(Color.RED);' A! n8 `, A! D0 ^) d
- g.setFont(font0);
4 k1 S- z7 X' e+ u - let str = "晴纱是男娘";
! B! H4 x7 U& D S - let ww = 400;" t4 x2 M. F9 H
- let w = getW(str, font0);
5 N2 W0 a3 A& z7 U- N - g.drawString(str, ww / 2 - w / 2, 200);
1 S* F1 _, C4 F+ P+ w( y - }
% e: R c2 S, f- i) I- E' l - . ]/ Q6 z# ]' n; i. r/ V
- const mat = new Matrices();
/ _$ w P q, p7 a( q; m' K - mat.translate(0, 0.5, 0);
. X9 h/ s3 _3 X( ? - 5 z" G! X- j& s0 q7 h' |" E
- function create(ctx, state, entity) {2 ]) L. Y4 j& e/ q/ V0 _( ]' s( t, b
- let info = {9 |0 p# F) _/ \! f3 S
- ctx: ctx,
/ D. r0 z1 x3 ]$ h) B7 K - isTrain: false,# p9 c7 l( Z( t4 ] Y7 X" |
- matrices: [mat],1 m! o1 h7 d5 {
- texture: [400, 400],
/ ^+ e; s4 \: g: J( U - model: {
# r7 Z& \+ |; l( @ - renderType: "light",2 `! T: B4 P7 _ P/ S7 B
- size: [1, 1],* }& r0 j7 B; w: S' d, f8 \, j) U
- uvSize: [1, 1]
* [8 E0 `+ J( [6 B- p1 d% ^ - }. t2 K M, @* H' E; I: j
- }
0 k5 F: k) k* _" ^6 E - let f = new Face(info);
4 u4 {" c+ V; ?+ M8 S - state.f = f;
5 ~( l8 @. M8 F - 9 e$ e1 p+ }# V4 G0 [- s
- let t = f.texture;2 e; N. e% ~; U. a# s
- let g = t.graphics;4 ?* H: G) o* y' L/ ^4 j9 z
- state.running = true;1 R6 R5 Y0 ?: M' Y
- let fps = 24;7 {; F5 [4 d! p+ P9 }
- da(g);//绘制底图; q4 b& }4 Y M# z. K) _
- t.upload();
. h- _0 `; c$ G0 ]. B; e$ ? - let k = 0;
3 @; z+ A# x+ w* H( V/ ^+ g - let ti = Date.now();, X7 y0 j% Q) A- v F$ s8 L( n
- let rt = 0;
5 _: m/ p2 B5 X+ j5 Y - smooth = (k, v) => {// 平滑变化* e4 A. m0 v4 R: O
- if (v > k) return k;
1 E r9 N1 l5 V) X: |- S! V" g0 M# k - if (k < 0) return 0;8 h4 ~( \2 G Y7 y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" p( N& b' k' b0 U% a9 r8 J( e+ G - }% o2 R: q5 p/ B8 Q8 O
- run = () => {// 新线程: Z) R' S# A- N
- let id = Thread.currentThread().getId();
; a5 F7 a8 B9 V% V) ] - print("Thread start:" + id);
1 D+ e4 h. p5 P# `# C z" k - while (state.running) {
3 B& | p( R9 H' | h1 B X - try {
" ^* y5 Z0 H6 {) Y: U2 b# l, z - k += (Date.now() - ti) / 1000 * 0.2;2 G3 ~; m+ B- q4 A: {
- ti = Date.now();5 }* w9 R9 O9 ?5 y$ R: t8 Q' b
- if (k > 1.5) {
* l, y7 H! Z1 h+ `" p - k = 0;: d% P7 d& O' ?$ v( n" Q/ I
- }, I* a* O$ d2 k9 R7 N( b
- setComp(g, 1);9 E3 Q2 z0 j0 R6 b! v
- da(g);3 m+ }4 _- c9 u' `" l# Q
- let kk = smooth(1, k);//平滑切换透明度% n! L' m: K# K- K5 G+ J; P
- setComp(g, kk);
0 A7 l/ k: R. p. r - db(g);5 r, @5 p0 d# ?" p% l; y
- t.upload();' ~" W( Y I$ ^. ^2 i! x9 i9 J; A
- ctx.setDebugInfo("rt" ,Date.now() - ti);
' c! m! y f% O - ctx.setDebugInfo("k", k);
4 t+ r/ j: r* C J# A - ctx.setDebugInfo("sm", kk);& ]5 l4 H2 h3 s! O6 Q$ Z
- rt = Date.now() - ti;
8 t1 E2 F- P8 N3 C% n - Thread.sleep(ck(rt - 1000 / fps));/ I1 D% K& W" v2 Y" N. O) A
- ctx.setDebugInfo("error", 0)
. T6 i% m" F& j8 X o4 f' ^" D - } catch (e) {; }) q, Z" v8 u9 ]% k' N! ?- ?
- ctx.setDebugInfo("error", e);
" A# J) Y8 A4 R6 C& P/ C5 y( @ - }
$ ]' i- f" Y& F9 @ - }
! a6 Q! d9 B6 H! }, C( t$ f( Q: \ - print("Thread end:" + id);3 o, y0 A$ w0 `. u( G, L& ]
- }
% W: y! }/ K" p. L: `% H: ?1 B - let th = new Thread(run, "qiehuan");7 w" t( a+ h( C7 n
- th.start();+ f$ Q. S' N: I
- }1 l7 E4 k$ [5 o3 z/ m; M
- 7 N7 ~. ^+ t1 v1 L8 n* x- r8 d& U
- function render(ctx, state, entity) {8 T( @# b" r5 M# o
- state.f.tick();& H, w( y0 q1 O) X% \. i' S9 C
- }% B0 ~, n% ~5 J( [& W& U2 E0 c. F+ ?
9 w3 v8 L* i8 g) A7 |7 n3 S- f- function dispose(ctx, state, entity) {% u5 N6 N3 u/ q7 ~; q
- print("Dispose");+ ?' U/ W1 X: J. Z$ T0 J! V
- state.running = false;* z- X& ~& S+ x1 h0 }) J0 l# N6 H
- state.f.close();( I& N% h. b3 \, \4 |; ~
- }
4 g% O( b' f% o9 v3 |7 d) ~' r - ' [3 Q! k; {+ }; ^
- function setComp(g, value) {$ v; h$ y5 E$ }9 y3 o
- g.setComposite(AlphaComposite.SrcOver.derive(value));2 |. Q2 p5 J3 j/ _" J, Y) Q) |
- }
复制代码
2 D5 A6 x! `5 z; X. t9 E% e1 _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。! ^9 ^6 S7 H/ e3 K
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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); n9 \) }' Y% w8 y% Q X
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