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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。
5 L9 L$ {; @3 Y+ f! A2 b+ J/ ]; s9 z- importPackage (java.lang);
7 V; P4 x' o* j* {9 J. p - importPackage (java.awt);
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( {: a6 ~3 P) u- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); A4 z9 Q: Y2 i
6 P( |* M6 K# Q2 Q! R+ Y0 x- function getW(str, font) {5 `" p4 j# M6 e
- let frc = Resources.getFontRenderContext();6 T4 c7 U7 {- E% [" c
- bounds = font.getStringBounds(str, frc);
% D h: x% M4 J q6 R% ?- y - return Math.ceil(bounds.getWidth());6 q- |* x$ Z) ^
- }
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9 w# }9 c9 S g x# ~7 M0 L- da = (g) => {//底图绘制9 |/ m% |" I3 P$ l
- g.setColor(Color.BLACK);2 ?9 h; e/ x# l7 E
- g.fillRect(0, 0, 400, 400);2 X+ E. u% [5 z' v
- }
5 ^4 M: L" p# ]2 S - * |4 B+ H" g! ^1 x, S. ~) A
- db = (g) => {//上层绘制
; R. w. E D: g+ O; i - g.setColor(Color.WHITE);% M5 y% c0 m6 l2 V
- g.fillRect(0, 0, 400, 400);5 G0 J( c/ B( n" c# H
- g.setColor(Color.RED);
# }( k! n' A7 [! S - g.setFont(font0);
# v/ J7 n6 H7 J G; m6 E! F( _ - let str = "晴纱是男娘";
2 @8 ~# n! z2 ^9 S3 X - let ww = 400;
9 B: f6 S6 c$ X9 n - let w = getW(str, font0);, I7 f$ p. W. M3 a* R o- J
- g.drawString(str, ww / 2 - w / 2, 200);" W/ F. J6 r# N4 v
- }( i4 j2 x# J: Q) z/ O# O+ l
' N; K* b8 w% P- const mat = new Matrices();
$ V! n! p- D0 D - mat.translate(0, 0.5, 0);$ |0 D% W! w3 Z$ `
3 ^2 z w2 p9 G4 V( O! z/ `- function create(ctx, state, entity) {
$ t7 ^1 ~# v+ x7 b& f' d3 G' s$ X- U3 u - let info = {4 P* ?. o V% M; W% w
- ctx: ctx,, C) l8 \0 m1 s- I
- isTrain: false,9 l$ ^- L4 o2 V& \: R3 ?
- matrices: [mat],: X% P1 s( L O5 d+ I
- texture: [400, 400],
* J: {* ^# V5 P1 A* x) @, U9 Q9 [ - model: {
# U7 }+ \) [$ x1 L% f - renderType: "light",3 D4 B8 q0 f8 G
- size: [1, 1],
( s' d M5 A! _: A - uvSize: [1, 1]+ _8 g( N8 j% ?. ^6 n! @% m: N
- }( { L$ w$ G7 m9 u, g9 o) [
- }% \# h4 V! E8 C" A6 P' M1 b
- let f = new Face(info);
% |6 N5 }; q# v$ B - state.f = f;
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6 x8 m7 e! k8 o: N+ U2 w- let t = f.texture;
8 M3 s( o D* e: @0 l - let g = t.graphics;# C: b" V2 C0 D; `: a6 \8 b- F
- state.running = true;
! [; y& B- e% F( K - let fps = 24;' H3 |# N- x- Q, z
- da(g);//绘制底图
; C( i9 {$ C0 q$ @ - t.upload();1 Q& {: D; X' B" U) G- d% g
- let k = 0;) o5 a0 y3 ? [" x& A
- let ti = Date.now();# | Q1 {% e* {
- let rt = 0;
* L. Q1 {2 N" T' \7 f0 K! c/ B& M9 R - smooth = (k, v) => {// 平滑变化
7 x) A* u& U* y6 v0 Q - if (v > k) return k;& \# H! ?7 b' b' f) s% \5 N! _2 [
- if (k < 0) return 0;4 J" i* Z" @+ I7 H' ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程5 s6 N0 s) L( @
- let id = Thread.currentThread().getId();, H7 \% m2 \$ V
- print("Thread start:" + id);6 v! k. r9 I) i
- while (state.running) {
v0 e- c# p+ } - try {2 J2 M1 u3 S$ W
- k += (Date.now() - ti) / 1000 * 0.2;
0 l9 A+ K, g% e, U - ti = Date.now();
$ D9 Q* p2 c" P- D& n+ u - if (k > 1.5) {! t/ ?% {* I3 g8 n- f" Z
- k = 0;
2 A. Y2 X* c6 E0 J - }
9 e2 E: N: Z. E$ S1 D# o - setComp(g, 1);
& C C2 k' ]7 b$ t ?! h; G" h - da(g);
" s" V' p/ C2 c: q - let kk = smooth(1, k);//平滑切换透明度
: g: m# t" ^1 o$ N/ l5 H: q - setComp(g, kk);/ ]7 K, R7 I. R3 B$ X- ]0 H: U
- db(g);
& H. _6 J1 J/ { - t.upload();" A9 \( J+ h& ~/ ~
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 c2 S, f/ I* D% D
- ctx.setDebugInfo("k", k);- i7 A: `. Y4 M& d, V$ }+ m( Z
- ctx.setDebugInfo("sm", kk);2 c- p, P* [* m8 n! W$ k" T
- rt = Date.now() - ti;
{, [; ~6 o9 Q - Thread.sleep(ck(rt - 1000 / fps));
2 F4 s& N, y6 n; C - ctx.setDebugInfo("error", 0)* O. N K" S: v+ U4 T" s
- } catch (e) {
& v# u7 f3 v1 c& ~0 i - ctx.setDebugInfo("error", e);' I1 R/ l2 v* [( Q/ }% i4 S3 M
- }
5 L. `; K( n" u$ S: q - }
* z* [: ~! _: o5 \! h - print("Thread end:" + id);6 e/ Q( I# h# E7 ^
- }5 [0 u4 ]" W7 |1 u7 ]1 y9 Q0 _
- let th = new Thread(run, "qiehuan");
/ x& P1 T' ?* N6 F1 g( R - th.start();4 M1 U) b# j4 k4 S
- }4 K2 R, Q- j; a1 v( A) F1 }3 o
) X. p- m2 D$ ~8 A ]3 Y7 A0 }- function render(ctx, state, entity) {$ }% a5 @ Z) p. u( c1 J
- state.f.tick();2 E- d4 w; @1 a8 I
- }
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- function dispose(ctx, state, entity) {7 Z- Y% ~3 k8 A3 E9 g1 y! z
- print("Dispose");3 Z- r% f5 T3 }' J- p7 P' Y
- state.running = false;
2 J$ ^6 S/ l" U3 z2 T6 \ |; H - state.f.close();2 U& _2 [: [9 ^; | z6 Z8 {
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- " y2 a1 _" F& G: W3 `2 y
- function setComp(g, value) {
! C$ C, f& K+ h6 h( E - g.setComposite(AlphaComposite.SrcOver.derive(value));
( k1 N! ]% a/ J5 S. t) g3 V6 u8 _ - }
复制代码 : f- ~- v2 X6 n+ `$ 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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$ J2 a2 V4 U5 F, I& g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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