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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。
$ l |$ E K! w' o7 H5 D' e- importPackage (java.lang);9 U; d5 d* U, [# a1 ]' M# H
- importPackage (java.awt);: p1 c8 S# f0 ?$ P- S- d
- " q) O7 y2 f2 Z% s) r" l- g
- include(Resources.id("mtrsteamloco:library/code/face.js"));
: P- `, {' {: B6 ~3 h$ d( g. k
) }+ Y! k5 C2 r1 K0 x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
' V1 B) _8 l& o9 G) `3 C5 n
" O- N! {+ F4 M* i o- function getW(str, font) {
6 e3 \' M3 s& K4 `) U$ m - let frc = Resources.getFontRenderContext();% Q- ?9 _ p" f$ G: V1 [
- bounds = font.getStringBounds(str, frc);
9 O9 e. a& n6 k: }# l- E/ f - return Math.ceil(bounds.getWidth());
9 O5 `. o: t; o3 x$ \ - }9 O8 m- H( A S' `
% d2 f, w% w# {, b* @- da = (g) => {//底图绘制
. b: Y1 W- p0 G7 g - g.setColor(Color.BLACK);4 Z- l, n, N1 f8 x2 j
- g.fillRect(0, 0, 400, 400);
4 ]& @ o4 T& I) N/ B& E% v - }8 a0 r6 M, W2 F- W
. W: v! Y9 ^4 x- db = (g) => {//上层绘制
8 P0 g4 a+ T7 `/ u - g.setColor(Color.WHITE);
* m' V+ E: f: P! q5 v$ w. `& g - g.fillRect(0, 0, 400, 400);
# P, _# e8 A8 A& q! j6 @* o - g.setColor(Color.RED);8 Z2 l d/ K+ N+ E3 j* {
- g.setFont(font0);
+ D- w( b2 p) }0 b; V0 l - let str = "晴纱是男娘";
% T7 H$ P/ \% h! _' E - let ww = 400;+ D3 x) f" k1 o4 q$ e- m, z" J
- let w = getW(str, font0);
( @5 a0 Z( x* T, {' P - g.drawString(str, ww / 2 - w / 2, 200);3 B% l$ v F: q# C; x% F7 o
- }
) j+ b& u- J! S; Y - - g b$ l. K- L; Z( P
- const mat = new Matrices();
& _, j5 [% G1 B# ?$ N1 ]7 b - mat.translate(0, 0.5, 0);
% [5 W, L# a0 U& W' I - . m7 a# t' f& S( b$ k- _
- function create(ctx, state, entity) {
/ A3 V0 @0 i: t, `" X - let info = {
% r# |6 A: w; J+ M, g7 H4 \ - ctx: ctx,! V5 Q- b; F7 G1 N. A
- isTrain: false,; s" f5 d, I' k( t
- matrices: [mat],
7 i5 j: j) |: X; I; w: d - texture: [400, 400],
* V* b2 ]( L4 s& W) X5 T- x - model: {
$ \5 W- |7 m7 g - renderType: "light"," q3 I) y& p+ Q0 P
- size: [1, 1],3 ^$ Z2 |/ _% _ Z4 C2 a1 b0 k( p
- uvSize: [1, 1]
6 H: g) `0 s2 @. v# N1 y3 a - }
, s' |7 M2 {/ T( f1 R" ]* y - }$ e! t' K N2 l" T0 P; T8 L
- let f = new Face(info);
' z, f0 \9 w2 F - state.f = f;, b; D; u8 T* n0 |- B
- . U4 N( Z" q, q6 K0 w: R' e3 Q* x
- let t = f.texture;: c2 r! t9 \0 ]2 ?2 |
- let g = t.graphics;9 q0 p7 j7 u, x( G- S
- state.running = true;
: B5 _% {( L# m& H - let fps = 24;# Z% R. }4 B6 A2 G" h+ F3 k( |1 o4 h
- da(g);//绘制底图
9 u/ X8 U) c p+ x) G - t.upload();- Y% u: L1 n; o1 [/ q* u
- let k = 0;# B! D' {% Z& L
- let ti = Date.now();$ D" F% l8 L! @. a+ |: y q
- let rt = 0;" s2 f; `& D3 b$ [6 r5 U) H
- smooth = (k, v) => {// 平滑变化
: M* z3 _* ]& e3 v* e( r - if (v > k) return k;
0 C2 d5 R( x1 z1 d) {0 e/ S9 B2 d - if (k < 0) return 0;4 X( [6 `4 u" S) h7 u
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. w* g& b& u1 {' z/ m5 @
- }
" g* n9 M7 F+ o: c - run = () => {// 新线程
- z) a9 N b' a - let id = Thread.currentThread().getId();
: j" \1 T: j4 e, h9 x# [ - print("Thread start:" + id);
7 P" ^7 T$ a7 c- M - while (state.running) {4 f2 D$ |0 T& G/ [- i4 x$ y9 u: D
- try {
4 A6 j4 H- c( Y% h0 a - k += (Date.now() - ti) / 1000 * 0.2;
2 i$ _+ K" a( [% f% z7 a [ - ti = Date.now();
7 [+ \2 L$ K% O* c3 ~4 r - if (k > 1.5) {
3 @, U; P( V; s6 W7 J6 F - k = 0;% o+ c' j4 q/ X
- }$ g* Z+ Z3 o3 y4 F3 k% g, e
- setComp(g, 1);1 {2 O4 ~: N9 ?9 A7 s$ o
- da(g);8 {- u& F/ N3 B- i
- let kk = smooth(1, k);//平滑切换透明度/ h" u8 J& i0 o, ~% w) t' V
- setComp(g, kk);
; F$ D) E& D3 y$ B4 @ - db(g);
K/ g8 z5 E+ Z6 ^) Y& n; [! P; B+ G5 E - t.upload();
1 D* @! z3 C$ n- L! y0 X - ctx.setDebugInfo("rt" ,Date.now() - ti);
$ o/ e" Q6 C) C, V( v+ Q" D+ r - ctx.setDebugInfo("k", k);
3 @* i B6 i2 b1 e - ctx.setDebugInfo("sm", kk);
" o0 M. v7 n1 F7 p* k - rt = Date.now() - ti;. ^! n/ `4 ] x/ P$ w% k
- Thread.sleep(ck(rt - 1000 / fps));- i3 B2 S- ]2 V( c0 T( L
- ctx.setDebugInfo("error", 0)
+ ^% K( y1 `5 Q - } catch (e) {5 q4 j' n1 f8 K& u. V; |7 f X( ^6 p
- ctx.setDebugInfo("error", e);+ ~' I/ X. k% }1 ~* W& K% u
- }
0 @9 p5 ]# a, Q4 k' ?" { - }
& l) B# I3 a A: f& n6 Y - print("Thread end:" + id);
5 W: E# K* j6 Y1 ?; y# J6 ] - }
4 x: w2 a7 L0 x: _ - let th = new Thread(run, "qiehuan");& R# f+ r. Q( V4 u1 F/ Z
- th.start();: b7 [( N# D/ N
- }4 j X$ K, k, w* J4 o
- & z7 k$ f/ Y$ s( r
- function render(ctx, state, entity) {0 T0 Q, h/ i# Z: m k% L. X- s
- state.f.tick();# [7 P( r8 j! r) v8 r
- }
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) a& J( m( s- v7 ^3 s1 ^' |% y- function dispose(ctx, state, entity) { g& e( G) E0 _) L2 ]% K3 _; D
- print("Dispose");
' E* v' d; t; X; h5 t% @5 \ - state.running = false;, ^. [$ G A5 J4 l4 }! H% q
- state.f.close();) h- O: h; A, P" V- u" A! Z
- }9 U8 c# d/ N# V. I' c0 r* m- g
: F0 u5 K# f% ?% v9 V+ X! P6 c- function setComp(g, value) {. x; ] v6 x7 U7 W; B
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 s3 ~+ m b- e) o - }
复制代码
6 `4 y" {( a- }( U: Q7 p* h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。 M$ B9 ]) b0 F4 q0 C# h
6 l" b) p$ z* w, b6 ?7 [5 x1 J, ^4 J0 H. I
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 j( @ q0 j" F8 u9 S8 h5 c
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