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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。
* b9 l3 O4 N; ?2 F- importPackage (java.lang);+ N [, S4 v: C# a* g' B
- importPackage (java.awt);$ n6 C* S, X0 A/ d' ?1 O) H0 y
- 4 J# K4 e% W3 m- _+ U7 |3 [
- include(Resources.id("mtrsteamloco:library/code/face.js"));' S: Q8 ]3 ?- ]- |6 j! V
- # s+ D: L$ z: H1 l: P. p* ]" | N. k( G
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# `) X( U8 `- X
* R; t/ ]2 n/ F' W7 G6 h1 E- function getW(str, font) {& I: ]+ o3 R' l7 k7 S& x* v
- let frc = Resources.getFontRenderContext();
E6 X/ q* d$ q8 ]( `& j: T7 U8 J - bounds = font.getStringBounds(str, frc);0 U; R. W1 A" j
- return Math.ceil(bounds.getWidth());
0 ~( T" p$ Y. p& O: t8 A - }
. a& c# q2 |) t7 Q) f+ ^: a - 8 O- a; E% c' U
- da = (g) => {//底图绘制
( b- U8 m- w Y* F# C - g.setColor(Color.BLACK);
" R( y, g1 ~: E! u, E, a7 K; {+ Q, m$ K - g.fillRect(0, 0, 400, 400);
. P2 A0 W# u7 b& ?/ g - }5 q" G H4 N" `
- . d( W4 u7 E# q! ~. m: v* ~: b7 W
- db = (g) => {//上层绘制
: P6 q1 J1 z6 x% q5 J2 I" ^: ] - g.setColor(Color.WHITE);# t* j! |. ~" k- |
- g.fillRect(0, 0, 400, 400);6 @3 i' \% H$ q' O V" g% p; f1 b0 \3 y
- g.setColor(Color.RED);
5 x3 O6 y$ p' D - g.setFont(font0);4 N- L$ l: e. W! z8 I
- let str = "晴纱是男娘";
0 u% Y3 e3 Y0 V( t( }# f' O - let ww = 400;
' M9 I O. V, N - let w = getW(str, font0);; e' z: z) E* ]6 G8 Z
- g.drawString(str, ww / 2 - w / 2, 200);
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- ! l' V4 a% w4 D0 Y% P2 X
- const mat = new Matrices();
# Q/ i( A3 E1 ]1 w0 R, ] - mat.translate(0, 0.5, 0);/ V+ H& G+ Y! u
$ Z( l+ i7 p; z+ b, @* I, y- function create(ctx, state, entity) {
2 s7 f9 R( I, ?8 [6 _! z/ D - let info = {) a0 T0 X, S9 E6 Z1 \6 W, h
- ctx: ctx,; \& r1 @% A3 s+ \6 h/ v. ~
- isTrain: false,4 k% F. r4 Q& M1 f
- matrices: [mat],0 e. q4 O3 M) m. ^7 @! j5 ~
- texture: [400, 400],7 D3 G2 ~ j) A# V5 M, o% ?- o
- model: {$ L. q3 n- d: v' _9 Y
- renderType: "light",
( u0 @+ w0 s; |! P Y - size: [1, 1],
# @4 {7 M6 Q1 B/ p - uvSize: [1, 1]' q9 m' F! s6 a* Y
- }
- T# ~# c, s1 T7 S+ U5 T4 O - }8 g( w. W1 g& Q
- let f = new Face(info);
" w) D' B) m) {) {. }( @4 c9 e - state.f = f;
5 g7 y8 q9 w3 t7 p
4 g. Z) ^; a, q; ?7 z- let t = f.texture;
! e! ]2 D& R9 M - let g = t.graphics;
/ A2 p: E( T) B5 T2 o2 B5 a+ \0 X7 | - state.running = true;
$ i7 _5 Q2 H$ R! S7 ?/ l - let fps = 24;
$ I& ?1 V9 D! s - da(g);//绘制底图
0 Z3 @8 c: j& x - t.upload();
1 D/ K/ m# C- ^$ L - let k = 0;
' F7 x5 r6 A: h) B `" m; f - let ti = Date.now();
$ V0 V6 t# M0 x% a. ?; ` ^ c - let rt = 0;( L2 e% S/ R8 e3 [% N4 w3 f! w% B
- smooth = (k, v) => {// 平滑变化
) H5 L- ]; }3 S - if (v > k) return k;4 z* F5 Y2 F1 @$ g; a: f/ o
- if (k < 0) return 0;
9 K; @0 O9 ]3 V2 J7 x. w - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) V/ W* V2 p: b0 w' B, P
- }+ t; e6 D! e# j" f+ Z
- run = () => {// 新线程
0 s6 d& c, g4 k1 ?3 c - let id = Thread.currentThread().getId(); L) Y2 q7 A. N, {7 y! W
- print("Thread start:" + id);( I: r0 Q) Y# {
- while (state.running) {6 ]5 x$ b5 Z* s" u) _
- try {
+ K5 m( D7 B5 O9 m - k += (Date.now() - ti) / 1000 * 0.2;
. ?$ p# s" ?* g" |. ^8 q ] - ti = Date.now();
7 [: B& ?9 Q0 g( S6 e+ b - if (k > 1.5) {
' \ F! Y# l5 g - k = 0;
- L& _! }; e5 ?) l& D9 v - }; _ @; L& Z4 ~4 X7 e* E
- setComp(g, 1);8 @) u4 w- o- n) ^
- da(g);, X( W" l O) s# Y/ ^
- let kk = smooth(1, k);//平滑切换透明度
! C5 y. R' M- {' l8 L/ N5 X - setComp(g, kk);" r' L4 w% A6 ~
- db(g);; _# h5 X' n2 a4 D5 n7 i1 d
- t.upload();
7 I1 ]) ?7 r+ w" v: c" D - ctx.setDebugInfo("rt" ,Date.now() - ti);( O d: x9 O3 _ J+ y) q
- ctx.setDebugInfo("k", k);
v1 `" M8 b( w& u - ctx.setDebugInfo("sm", kk);" U* M& G' D$ `1 A g9 @0 a8 `, d
- rt = Date.now() - ti;# Q, p+ {0 s2 u/ D) k4 q
- Thread.sleep(ck(rt - 1000 / fps));6 h# j. ?" Z" F$ I$ ]
- ctx.setDebugInfo("error", 0)5 _' c' f$ x5 a% W6 x
- } catch (e) {
$ F7 r2 T6 G2 T4 h4 R - ctx.setDebugInfo("error", e);
0 u: M% [6 o+ b* V' H2 i* ~ - }
9 G0 t% C0 t; q$ h - }$ ^4 J2 {, H ~0 [2 J0 [
- print("Thread end:" + id);5 D* `; ?+ p+ c
- } W4 r' |2 U/ m1 Q
- let th = new Thread(run, "qiehuan");0 h9 ], Y0 ~/ p5 h* }
- th.start();
% g: j t2 W' O1 ~9 I6 H2 D - }
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' Y. n' _" v! G# ]% t2 q- function render(ctx, state, entity) {# @: x$ P) s5 ~' l
- state.f.tick();
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- # }7 v- L1 j. Q' |2 z6 `4 i A7 x$ C0 _
- function dispose(ctx, state, entity) {
/ o9 _0 i8 A/ g - print("Dispose");
. t; Y; a, p1 A& o3 g - state.running = false;
6 M1 Y# [& X$ N; W9 q# q# T - state.f.close();
: |$ a/ }5 B1 `8 J+ u - }
W& {3 J6 Y* q$ e6 c - 0 W: k- _' C5 d7 H% i. c
- function setComp(g, value) {% ?, M$ O2 k( w, l
- g.setComposite(AlphaComposite.SrcOver.derive(value));# r% W- @* Y! c0 A4 @1 |6 \
- }
复制代码
' d: G0 H2 z. ]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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& {; S; \; L% r' D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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