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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。! D0 d3 c" ?0 D
- importPackage (java.lang);5 b }9 x% r, T$ m
- importPackage (java.awt);) q6 ~5 Z0 T5 O6 U; i
- 0 @* n1 r0 R0 @9 M
- include(Resources.id("mtrsteamloco:library/code/face.js"));6 M+ | k5 b% c3 U8 Q3 I3 J
! g" y$ I' q" |1 ~5 O- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, Z+ N8 ]- w% v7 E, v. _
: W$ d. x% s Z- function getW(str, font) {) j1 L# ?4 b+ M% f' U {6 B
- let frc = Resources.getFontRenderContext();
. X( J5 L) a: { - bounds = font.getStringBounds(str, frc);
' P S& N; I2 u! t( x/ k8 R5 \ - return Math.ceil(bounds.getWidth());
0 i8 R5 r+ t% K3 ^2 o* i - }7 P) N; v- [) h7 K; `
- " `. ]+ K: I: I" |2 `5 d
- da = (g) => {//底图绘制* @' J. v1 P0 L% X0 Z' a
- g.setColor(Color.BLACK);
5 h' G. P7 d: k; J: b0 I6 N3 Q - g.fillRect(0, 0, 400, 400);
' A8 P$ K# u p4 Z; S - }
1 [2 I$ n4 n7 C- @9 z2 Y$ D! a - 5 A9 E" y5 R) _- W2 p7 F$ }
- db = (g) => {//上层绘制+ G7 }& m1 l4 v# c
- g.setColor(Color.WHITE);7 i, }7 q! N# v+ o
- g.fillRect(0, 0, 400, 400);
2 S6 m' P3 f' c8 M: S - g.setColor(Color.RED);
, C: L2 z7 o8 b; V - g.setFont(font0);
' j: _ g' d( u" h+ b# s I# T6 h - let str = "晴纱是男娘";
2 { h6 V! H. O6 |& ?, z - let ww = 400;) q- V b3 X6 o0 s* d
- let w = getW(str, font0);
9 X# O! T& D- Y3 e* D - g.drawString(str, ww / 2 - w / 2, 200);
" H9 f S# c( r3 x, m - }
5 R) a6 x4 P5 h0 g - 6 R5 H- Q( @! {! l$ S
- const mat = new Matrices();
: y, w( k% p. e, X' q - mat.translate(0, 0.5, 0);1 N1 o/ C6 `1 J; D% C1 c& s- U
. a; `. ?. e4 Q. M- Z- [- function create(ctx, state, entity) {
; l4 d7 A2 D( E, P# I; w - let info = {
3 K( L+ i9 A5 g. I - ctx: ctx,
2 I- g+ D- D! k( v6 a4 o - isTrain: false,0 Z6 u" m/ @/ e
- matrices: [mat],
+ e4 E; h4 X4 m) x$ c) O) E+ o - texture: [400, 400],; V- D4 E, U' a, g" ~
- model: {
3 }+ D+ z6 r2 a6 g1 `' p% P - renderType: "light",
6 m2 X- \) S$ `3 p- }: A5 F; {# E - size: [1, 1],7 b4 B3 I# Q5 r- R8 L
- uvSize: [1, 1]
( I4 j) N- N8 A, A8 d - }
) B- _) G- V- k - }
I& f5 I: u* B7 r& H - let f = new Face(info);
3 K: p4 n3 M5 K( F5 @& J% Y - state.f = f;: t/ I0 \5 Y: F. F B# K
- 3 s& ~) O+ A0 I; H; x* p0 C l
- let t = f.texture;
% X3 P2 ^1 |8 Q8 |( U- y - let g = t.graphics;2 R. B- [: X; U% n* q
- state.running = true;
2 f$ f0 r3 f4 n - let fps = 24;
2 y7 `# X" v: |! L - da(g);//绘制底图 ]2 ~! _3 k" M
- t.upload();( V, c. S9 \2 R8 i
- let k = 0;+ _2 [1 F) w' t' p) h
- let ti = Date.now();
- ?$ P& D4 F) }- K- s - let rt = 0;
0 w7 R. Z# n5 |4 c, R1 }% K5 M - smooth = (k, v) => {// 平滑变化
* v( L% ?+ B- V; ^ - if (v > k) return k;
- j+ x5 W' i* T! ^; s - if (k < 0) return 0;
) x" f+ t j3 b5 I7 b% W+ a Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 X9 F" C4 S# y; V3 j- r. ~# T' A+ d
- }
2 R) h2 @/ n5 ~8 Q, Y, O - run = () => {// 新线程
! m2 q& }/ U- n. @( d - let id = Thread.currentThread().getId();' t8 C& O; A' n/ A
- print("Thread start:" + id);
2 z9 @& q2 j" {5 X0 B - while (state.running) {
9 U# s4 K/ A5 [* S; ] - try {) H) t# Q8 r5 q
- k += (Date.now() - ti) / 1000 * 0.2;+ q% H8 p7 ~- m3 y! [! c
- ti = Date.now();
. b4 I2 U6 ?0 J9 A3 D" Y/ T - if (k > 1.5) {+ q/ i8 j) y- k, q/ ?/ r9 A
- k = 0;
. }( K# B9 X4 ~) \# }" n- Y - }
4 O0 n/ E6 f$ z9 c A - setComp(g, 1);
$ z5 v; B6 C9 e* Z) n6 ^- i - da(g);
1 }/ W3 [, o: e( v - let kk = smooth(1, k);//平滑切换透明度: i7 u1 h2 X* q: z; u v$ i+ y
- setComp(g, kk);3 v0 k Z ^8 f, G9 M$ A) l
- db(g);
! f) G$ U5 g8 H8 O2 O T - t.upload();1 }$ I* J' e+ p8 ?) g, j, n) L
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( A4 A' g; @* E: q" v7 N; |4 Z- w - ctx.setDebugInfo("k", k);: e, R; O3 x6 Y0 ]: s* s5 t
- ctx.setDebugInfo("sm", kk);
5 s1 U, e# v6 C2 |! \ - rt = Date.now() - ti;
5 I$ f3 G+ @ a& ^, K' J - Thread.sleep(ck(rt - 1000 / fps));
; N) L1 n$ }! q - ctx.setDebugInfo("error", 0)1 Z ]' p; r% w. Z4 G5 @& I0 S
- } catch (e) {
+ o- c _, y' _% E - ctx.setDebugInfo("error", e);
! h. W/ {* ]) t+ M - }" `* K4 A4 i3 W4 L. P3 D9 X
- }/ v8 }% s! F; ^: P* y" f- n
- print("Thread end:" + id);2 L9 t6 Q( N0 _( r0 u) b' r
- }' ~# f- T( s L" d: |# S0 F
- let th = new Thread(run, "qiehuan");
( R' ^& F# ?* @; c. o* L - th.start();
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1 l2 O( L3 _) G- function render(ctx, state, entity) {: a- Q( g4 v2 n" L7 R) h
- state.f.tick();: v+ P5 j( z0 L7 u) ?2 |+ i
- }% p2 \1 P' D! m+ [: K
- , X, O' z& C' B- W6 _
- function dispose(ctx, state, entity) {6 Q9 m' Y5 x2 j `8 j+ q, \% E
- print("Dispose");. _& b0 W' v# S1 x5 A9 y% f
- state.running = false;3 a) h2 X* x" ^: _& B
- state.f.close();5 M$ j2 V+ w% B6 g8 Y8 {7 r! k
- }
& k X1 I0 M0 D' y - " i1 Z* r) G6 d
- function setComp(g, value) {5 \8 H1 B# q& D" e/ p9 {
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: x5 O, n v; y9 d4 W" j - }
复制代码 - S Y) Y6 {" Z& f2 T
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。$ ^) V; Z8 E' s6 s9 p
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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)1 T0 d9 G' y' ~9 s; l: u
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