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U0 e# A3 Y' R; B( H, p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。
) k+ k! @7 [+ Z; Q# n; M* d6 H- importPackage (java.lang);6 r) x9 A; z% I S' t# k' W$ n
- importPackage (java.awt);: B/ v7 @! t K
+ Z) f2 ~ Q, H2 G# m6 r$ q- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" a6 i4 r* s0 W7 {& U
- 4 b; o; |) a# G5 j" P& E- ~# Y) G
- function getW(str, font) {
! Y2 K, ?4 t F+ y, v1 j5 i, B! I - let frc = Resources.getFontRenderContext();
- k# U. r! l t4 \ - bounds = font.getStringBounds(str, frc);
3 a5 Z) {8 X+ X) ?; }$ c - return Math.ceil(bounds.getWidth());# s+ A/ N* Z9 ~7 I
- }
+ L( ?3 V7 m- y9 Q' i( v - : i7 G7 Y" t4 J( ?" I) v
- da = (g) => {//底图绘制/ G |/ M2 u1 j9 k7 H) P
- g.setColor(Color.BLACK);
* |. f* v% v, q! U, S" U - g.fillRect(0, 0, 400, 400);
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- . e. h3 w9 [- v, s$ V8 @ }$ o
- db = (g) => {//上层绘制
8 n. d: y( ], c9 l2 m - g.setColor(Color.WHITE);
: r3 U t% r2 E/ \- L - g.fillRect(0, 0, 400, 400);
9 [+ B( \. k) B X; ^, ^ - g.setColor(Color.RED);/ v8 a, B/ ?: q& D0 u d4 J3 H9 j2 R
- g.setFont(font0);
! [5 l+ r# D+ G. C - let str = "晴纱是男娘";
( W( ]4 _5 R, t0 o, _$ |: b0 k - let ww = 400;
/ M: j; v0 R- ^5 h. m - let w = getW(str, font0);, \( T( x8 Q+ x
- g.drawString(str, ww / 2 - w / 2, 200);: E7 s, O% F/ [1 q$ Y( n
- }
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$ V1 ]+ `% u( g, W H. h4 p* m- const mat = new Matrices();0 \' u; K% x) R4 Y y) Q
- mat.translate(0, 0.5, 0);
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) P2 s7 q5 ?+ c0 u( h6 W0 t! \- function create(ctx, state, entity) {' V9 U( I1 ^4 _; k
- let info = {
: q8 ?( ^5 ?$ V) y( Q3 M - ctx: ctx,1 f% ^% T# w$ W$ ~0 \) @ s( o8 |
- isTrain: false,
+ t M1 N7 |5 ^ - matrices: [mat],
* a7 [) Q1 I: E( ? - texture: [400, 400],/ R" I) k( G2 Q! c
- model: {
5 S+ C" F- V/ F5 T4 q, t5 D6 O. z - renderType: "light",
5 V! z- k1 F3 y x8 y - size: [1, 1],% T* k3 B7 C3 u4 {" L# t3 a/ c$ N
- uvSize: [1, 1]
: A E, ^% {. q6 J7 J4 B1 M - }) Z. d& N1 c4 T
- }
1 G2 z# ^2 ^9 ~# X: s$ ]" o" ~0 O - let f = new Face(info);# K1 `, B7 F: T3 M) O' D
- state.f = f;! t: D" k& E" x
- - C: I/ ^; r2 d( D9 l2 I
- let t = f.texture;
' V' d+ a6 q! K( Z2 z9 A W# C8 P - let g = t.graphics;2 u$ d7 |; u0 T; ~! q0 J3 C
- state.running = true;' F4 [; Y" S; @# I& {# d
- let fps = 24;
' e) d! C) q) b, D h1 ^ - da(g);//绘制底图
" Q; w# o# B) x4 D" _: \: U - t.upload();5 V% `+ h8 R4 H- E1 `
- let k = 0;# q# n2 C( d8 m
- let ti = Date.now();
: Y* n# f% q# g' h: R6 h _& m - let rt = 0;+ s E- Q# b# i4 S( s/ }4 t. ^
- smooth = (k, v) => {// 平滑变化, ^0 {, A* X9 ^3 L8 d4 K- o
- if (v > k) return k;
t9 C/ R& ]5 O: R% l - if (k < 0) return 0;
; p3 [2 C! e# |) B/ i- X- ~6 a4 B) _ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 B. c% g4 {; u
- }
# N/ m B' q1 E* ` - run = () => {// 新线程
4 V2 V7 m- ~. {) p& } - let id = Thread.currentThread().getId();
4 S& Q5 u" V7 U% ^9 D - print("Thread start:" + id);
* m. C! [; ~% Y - while (state.running) {
1 l8 h7 [, ^: r$ ~4 _ - try {
" v, V2 n( x$ V1 }" P9 \ M - k += (Date.now() - ti) / 1000 * 0.2;
$ F! P ^5 G4 I: _ - ti = Date.now();8 m- I. {3 E3 I$ i% E3 k
- if (k > 1.5) {
, S1 A N3 @0 w% o - k = 0;. e9 _( f/ b/ p7 @5 a7 p
- }/ f! b& b* N1 E% f6 H2 C: P, C
- setComp(g, 1);( x! X6 a$ r5 X A
- da(g);
0 H+ R4 B" C. l+ V- G - let kk = smooth(1, k);//平滑切换透明度# c8 ~2 o; A8 Q' L3 N* F. p
- setComp(g, kk);! v7 t: k& ]4 V8 f/ t( T
- db(g);$ O+ c6 D2 D5 d, `7 h4 k
- t.upload(); q3 E: i/ i- i7 @! }4 C# G
- ctx.setDebugInfo("rt" ,Date.now() - ti);) h& W/ u% z( P) B7 ?1 u$ F+ \
- ctx.setDebugInfo("k", k);
8 J5 p% B8 [4 |/ d - ctx.setDebugInfo("sm", kk);
: T( O$ C9 U* x: t, a - rt = Date.now() - ti;! T& r* o. H; L* g6 z8 Z. v3 W4 Y/ d
- Thread.sleep(ck(rt - 1000 / fps));1 G4 l- R% p' Y6 G
- ctx.setDebugInfo("error", 0)
; m8 V& a4 B# e o: H O+ |9 H - } catch (e) {
* v+ H1 M# i0 a8 G0 J - ctx.setDebugInfo("error", e);- n' b0 P2 D" B( {
- }
4 c. r/ C) ~+ m! C) O0 | - }
: x6 h1 w4 h# e - print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
( k8 v) J: Z8 q- k4 [# m0 m) [ - th.start();, T) T6 P: S( ]" a% C
- }
( `! |" ^2 Q& x y3 G1 c
) s* P8 o6 L. S0 @- function render(ctx, state, entity) {
6 U$ k4 {' Z8 K - state.f.tick();9 S' W: J0 m2 C/ C5 T7 R
- }; y4 Q. j1 G% V/ d( K
1 G- D8 |5 {; }7 c- function dispose(ctx, state, entity) {0 x- | b6 a: D$ L' S& C% }8 G8 Q
- print("Dispose");
- |: ~, b3 E8 e7 w - state.running = false;
]& ^: E6 _( X" i4 w - state.f.close();, h" G% N4 L6 E7 j# i; q
- }
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- function setComp(g, value) {
. d% d5 r) ^2 U2 X/ W - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 f8 C" b/ v8 J - }
复制代码 * z1 @3 ~5 L' z( F/ I
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。0 x8 U0 u7 r+ A+ B
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2 \; l" H4 c! |5 J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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