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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。6 w; \: W3 R7 B% W A
- importPackage (java.lang);/ T, v% [- Q* k
- importPackage (java.awt);0 ^( Z' p, n% t$ U& {1 Y
' O" `- K) K b$ V7 O: ?8 F- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {! g H1 ^( G( [% |, a7 d
- let frc = Resources.getFontRenderContext();4 I0 j: L1 L* y l. G* X9 r$ C) Y8 r
- bounds = font.getStringBounds(str, frc);( d6 a& x" [* a- \7 _
- return Math.ceil(bounds.getWidth());; `& N6 S; v5 \
- }
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- da = (g) => {//底图绘制
9 q; O6 F0 L2 H# a/ |8 Y - g.setColor(Color.BLACK);' C1 j4 ?4 f+ Q& d
- g.fillRect(0, 0, 400, 400);) r0 w$ t% C- D1 m
- }% z/ C" r6 \) {* u% E& J) L3 R
- 0 C6 ]& M! Q' @" E, }: L& [
- db = (g) => {//上层绘制
5 ?: n {9 K( F: j; R - g.setColor(Color.WHITE);5 K, k$ F; N" ^; f7 i3 A
- g.fillRect(0, 0, 400, 400);1 c1 R Z# e8 y! j6 \
- g.setColor(Color.RED);
3 v$ I9 S P j& h6 N - g.setFont(font0);# D% o0 b4 F8 E) A
- let str = "晴纱是男娘";
7 M- I# W9 {- v& Y1 Z - let ww = 400;
0 ?) D) k4 Z; N9 g$ t - let w = getW(str, font0);9 c0 ]0 p! A, y6 I# p, A1 T
- g.drawString(str, ww / 2 - w / 2, 200);' q' \: S z. C, i& ]2 z
- }
. @9 ]0 |2 N5 J! a - % f$ Q2 W7 K/ I6 @- v. v4 {
- const mat = new Matrices();5 b; r( p( M0 L
- mat.translate(0, 0.5, 0);
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% n0 M7 B! O6 ?- function create(ctx, state, entity) {
- H5 @" u6 z" c - let info = {
) q4 e& B! g3 X: C# Z* ^; Z3 e - ctx: ctx,) _' H. F8 Y" m5 \' \5 {$ w
- isTrain: false,6 k. T6 d. _4 {, ^3 F
- matrices: [mat],9 D3 C2 i$ R. w5 w# x2 f- h7 C. i. u
- texture: [400, 400],
* g/ J+ v c! A0 u6 @ - model: {
2 X/ C, _6 b7 g: r - renderType: "light",
, H: q9 c: z" h3 r4 _* H - size: [1, 1],
6 j' _6 ^7 K4 \& E7 g3 D - uvSize: [1, 1]
. E% R7 F; v; V% _! I/ e4 j; P - }' G4 B4 j6 f& `! t4 w# W2 d
- }
& A U! a/ c5 ?# I# @9 t3 d - let f = new Face(info);
4 E( T5 w( i" _) ?/ _) @8 [ - state.f = f;
% R9 j) p# q. V% G* }
8 e! E5 u; x6 L+ v' E8 s$ ]" y- let t = f.texture;0 L( B, z! l' J' _) _
- let g = t.graphics;% l& [/ f0 j$ Q0 t
- state.running = true;
) A9 Y) j2 l. G v0 M/ _ - let fps = 24;- q4 B0 N+ \- q7 [. b: Y6 y
- da(g);//绘制底图' {: r$ u! x0 v! [5 A
- t.upload();) ^+ l: l1 {; B) Z( ?
- let k = 0;
1 g8 `9 a i n3 }# Z3 Z) \ - let ti = Date.now();6 o2 v' k( U5 V$ l
- let rt = 0;8 h" d( o4 }; P* R& Z" l( r
- smooth = (k, v) => {// 平滑变化0 ^1 i. c# k+ C) @' i+ h! O* J
- if (v > k) return k;8 M4 b! \1 n8 J. U% `6 T( B9 x
- if (k < 0) return 0;
1 I0 J) q, t" [3 q% g - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( P( O2 U& O |0 V7 h
- }
0 K% I- H. G" M - run = () => {// 新线程; G: d7 L: u* f) X2 A. ?" s
- let id = Thread.currentThread().getId();! h4 G3 H, ~4 S7 F- ^+ z) z
- print("Thread start:" + id);
7 \0 S) b: o4 @! q1 [8 Z F8 a6 K - while (state.running) {. q% V& @0 m0 i- h
- try {
6 _6 i2 K6 D" @6 W8 K: L) `4 ]& N/ E- H - k += (Date.now() - ti) / 1000 * 0.2;( D2 B$ V" b* n6 k8 j) B; R1 _
- ti = Date.now();
; b3 J" r7 g- u6 i5 w0 k2 j9 V - if (k > 1.5) {
* Q6 O' A+ C, @1 N* W: ] - k = 0;# l0 c' h2 j7 _4 x) U6 E8 U, b
- }4 H# V; i$ j$ @3 T
- setComp(g, 1);$ m4 C% E, d4 T) h3 ^- T
- da(g);
* A% w, E2 M2 L; F, J - let kk = smooth(1, k);//平滑切换透明度
2 t7 O, f; U6 @ V/ I* y - setComp(g, kk);
* L# S n6 Q, Q( |8 d - db(g);
V- _" Y; ?5 Y( c - t.upload();
# t! m# m$ @6 G% L, t - ctx.setDebugInfo("rt" ,Date.now() - ti);- R0 M* e: Q1 ]' ]# G% i6 X
- ctx.setDebugInfo("k", k); ^8 v j* F: m
- ctx.setDebugInfo("sm", kk);8 n. Y7 a* K0 s( F# w2 p6 T
- rt = Date.now() - ti;
, v1 @2 t" R' Y+ d) P - Thread.sleep(ck(rt - 1000 / fps));, u* Q) E( g9 e# }8 n0 f
- ctx.setDebugInfo("error", 0)* w( w$ L' r' s) c4 y/ b0 c
- } catch (e) {+ C* g& f( k' a0 I
- ctx.setDebugInfo("error", e); k) p% i7 M5 I9 l" ?
- }
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- print("Thread end:" + id);
4 ?9 T0 @$ B# H$ U+ M& ~9 l - }
8 z$ V- u. A# X7 v9 M( M' M( ^ - let th = new Thread(run, "qiehuan");0 \3 E% l5 Q$ x+ ?
- th.start();
- I+ a6 ?4 `! ~: F: Q" Y% [ - }5 J$ S, C9 S! R+ r9 b
- ) @7 H" F& k2 F0 k
- function render(ctx, state, entity) {3 \6 S. f$ B* @: H& F, M
- state.f.tick();6 a) J0 N# A* I n% |' {
- }
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- function dispose(ctx, state, entity) {% Y' ^. j# J- X2 |: y4 Y" s- ~ e
- print("Dispose");
/ k4 ]( h+ p. l' N - state.running = false;6 p- j9 k, h: P
- state.f.close();
/ ~# d1 y0 ~/ E b. t - }
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( S4 u: W/ n& T' P- t8 n+ e- function setComp(g, value) {
# g( x. U5 u/ Z. V' k4 G - g.setComposite(AlphaComposite.SrcOver.derive(value));7 a+ w8 P9 G2 F" X1 _ s
- }
复制代码
1 m( x5 R# P' j. w* P! 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。# W) B, `% v/ V V
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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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