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" Z/ E! P6 f( ~7 L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。+ w+ F4 B7 n9 _2 Q( j# h* t5 M" h) q
- importPackage (java.lang);/ x2 y" ]) S, o- M, a
- importPackage (java.awt);
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% C# ^7 j% T; c5 a- H; }- include(Resources.id("mtrsteamloco:library/code/face.js"));9 @* W# R4 [- O/ L' @
- " b" S/ O: |1 \ U( H8 q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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9 @+ ^/ O& K3 {6 S0 Z- function getW(str, font) {+ t$ [7 p7 w% ^ ]
- let frc = Resources.getFontRenderContext();
9 y. T: }$ }1 [( k - bounds = font.getStringBounds(str, frc);3 O' p1 t+ [: `% m3 G1 O4 V) l% Q
- return Math.ceil(bounds.getWidth());- P5 L: @# O+ S+ p/ |/ r" `+ |. m
- }. \4 C/ {& F. g9 X5 a5 i
- ' \' S# }% N% J. N8 N
- da = (g) => {//底图绘制
' v5 G& `8 v. x% e: d+ j( b - g.setColor(Color.BLACK);
# V% w" i1 a, \& J - g.fillRect(0, 0, 400, 400);' V4 Y, U. f0 t8 D4 a
- }- y! u5 \! q3 b& |4 C
- 7 i1 x6 n/ C+ v3 L/ L8 v9 y
- db = (g) => {//上层绘制( P: ]' w+ z* S, y5 e3 B) [9 [
- g.setColor(Color.WHITE);
z6 {4 E0 }$ `. c - g.fillRect(0, 0, 400, 400);
. ^4 P' a* {& N - g.setColor(Color.RED);1 r: W0 @2 Q. H9 T
- g.setFont(font0);' _: O4 Y# Q9 h6 I
- let str = "晴纱是男娘";
( t. S2 A! i6 c1 z - let ww = 400;$ b; N* o$ C$ p
- let w = getW(str, font0);% @( H+ n0 ?0 Z
- g.drawString(str, ww / 2 - w / 2, 200);
! c+ o2 S" t$ M3 ]. R( D - }
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! V7 o1 f4 |& {" Q, S9 n- const mat = new Matrices();
9 O P" T7 s: |) [" r - mat.translate(0, 0.5, 0);
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3 P& Z7 `: O8 s9 r* R2 K- function create(ctx, state, entity) {
2 S/ [) f3 r, Y - let info = {
& P/ V* K0 A$ w6 X, f. J - ctx: ctx,
; f( ] C& [, L6 R: k - isTrain: false,# K2 r7 ~. }( |8 c: X7 m" ?
- matrices: [mat],
6 `6 e1 m, L8 H0 w7 H$ R - texture: [400, 400],; {) C, C; t% T) ] o9 v, t4 \
- model: {
* \# K& a5 d: Z$ y9 J - renderType: "light",
+ z. C- p9 H5 C9 ~4 s6 i - size: [1, 1],6 g* G9 N* _! |" g
- uvSize: [1, 1]$ Y! J3 d) N+ H: z V" h
- }
* @( J" a- b" q5 u - }
! S8 \5 [5 n4 w, \: d - let f = new Face(info);1 u8 ~4 l0 a1 L: N7 Y
- state.f = f;# D5 D" E" o# p, ?, I9 ~8 V
4 u% |5 `2 I4 ]* U- let t = f.texture;+ W% S% w3 j2 v! A/ V
- let g = t.graphics;
! L6 l% ?: i' i( e! p - state.running = true;
- ?; O/ \+ p& [( s6 W3 D - let fps = 24;
. M/ a1 _. z6 K3 M; V - da(g);//绘制底图$ R+ {; Z( l5 }% Y
- t.upload();5 X/ A* e8 C! n0 q2 {
- let k = 0;3 r. U* ~5 K) b) R( C
- let ti = Date.now();" A) ?7 L0 f: _4 u5 x& k2 ~+ b7 o
- let rt = 0;, W' u" c! u( Q6 Z+ R5 F* m
- smooth = (k, v) => {// 平滑变化, t, `4 U7 u: z8 w% R' Y
- if (v > k) return k;
3 G9 O5 b5 m1 [9 s0 R1 n f! a! H - if (k < 0) return 0;
' `: v* z! N# N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! D+ b K: ]0 G; L$ [* }3 a
- }$ S8 x x, |* W, ?& }- C2 r0 Z
- run = () => {// 新线程
; h! U& u0 q+ F4 l - let id = Thread.currentThread().getId();
0 e( l8 `3 d2 q6 A/ a9 e - print("Thread start:" + id);
( a# R! {! ~# K8 Z: g* F - while (state.running) {- ^& z, C$ ^5 t5 y
- try {
0 t' W, A* y4 B- Y" H( U( y" l - k += (Date.now() - ti) / 1000 * 0.2;' Z# M, r4 U$ T0 {( @) p7 k
- ti = Date.now();
- |. j2 B x1 H4 J2 m; D - if (k > 1.5) {
. N# }- O- Y+ N - k = 0;8 F: b1 k5 p$ |* f
- }
N" l' W9 o0 K+ R - setComp(g, 1);
. |2 @# H6 p5 i3 u - da(g);
( }+ P1 w1 h, q# T - let kk = smooth(1, k);//平滑切换透明度3 {. c! u2 l% \
- setComp(g, kk);
( i5 n2 q: }+ u- {4 n - db(g);/ R5 I, d6 N# F, Q! I- H3 \6 Q
- t.upload();
( |) z( n9 W1 o7 | - ctx.setDebugInfo("rt" ,Date.now() - ti);; g" B4 {4 n4 T2 d m
- ctx.setDebugInfo("k", k);
9 `. B/ {) i# H- l% o' S! g - ctx.setDebugInfo("sm", kk);! k) @7 y: n( o
- rt = Date.now() - ti;- h$ J$ x. F/ R" Y; J( O7 w/ p4 ~
- Thread.sleep(ck(rt - 1000 / fps));/ x8 W: ?8 A3 u
- ctx.setDebugInfo("error", 0)
8 {! t+ F( m6 N- k' ?% n) b; { - } catch (e) {+ A0 N: u3 w; a% b( e5 H4 x! |
- ctx.setDebugInfo("error", e);
, q3 }, J0 A# ? - }
% g% B& i5 v u9 Y3 X - }
- C; T. G- e! u9 c: O - print("Thread end:" + id);2 c0 a6 C8 H4 o# H- ^3 Y
- }
6 {" W- {) w5 a T" _1 M9 Z - let th = new Thread(run, "qiehuan");
D$ B G, O% V. _ c% w8 x - th.start();
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- ( p# o; B' x+ H) V. Y* p
- function render(ctx, state, entity) {9 \; j6 A/ _6 t; i9 }
- state.f.tick();, @8 R7 j! J z- _, l6 f' T1 j
- }; T! G- |1 f& b6 r9 q3 Z% K; H% r6 A
- ) w, O+ q X9 V% i( G4 J e
- function dispose(ctx, state, entity) {! e6 {2 @5 T+ K3 v0 y2 ]
- print("Dispose");
7 r# G3 T0 b5 |% B8 I7 H/ u: n - state.running = false;
, t" o2 I) ]8 `1 c% H r - state.f.close();
& }8 o/ P" s8 Y - }( a1 _6 }9 ~" W# g8 L3 E) r! |
4 P/ H/ I8 l& A M& o. K- function setComp(g, value) {
t5 P6 g6 E2 K - g.setComposite(AlphaComposite.SrcOver.derive(value));
( K y. |+ J( h3 c - }
复制代码 / x" M: k0 o' R% _& ]
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)
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