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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。# j+ _; q- @- g9 P: V/ N
- importPackage (java.lang);( a0 z. q3 Y4 u! l
- importPackage (java.awt);$ n7 `" H; a8 t" P N
2 m, a, n# T4 t3 r- include(Resources.id("mtrsteamloco:library/code/face.js"));
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3 u s) D H2 S( d; l1 i5 \" K5 y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
6 Z6 a- U0 {$ h7 D9 n - 6 B. \: L, e; D$ _3 C* _
- function getW(str, font) {
5 f+ Q5 z/ @) e5 H+ {5 H - let frc = Resources.getFontRenderContext();( C8 K! m v1 {+ p* @ N/ Q( n
- bounds = font.getStringBounds(str, frc);0 v: }& G* V6 M, O( a+ A
- return Math.ceil(bounds.getWidth());
. z% w, t" Z: m8 R R1 }7 b" K1 F - }
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$ l, A. A, r K4 E) P- da = (g) => {//底图绘制2 P/ _2 V( d9 B+ S' ?
- g.setColor(Color.BLACK);
8 z" n3 |8 |1 j% d( ]3 Z2 G& F - g.fillRect(0, 0, 400, 400);: M X1 h7 d: p o
- }/ j0 G2 L: x3 l. J1 ]) K; a( o! J
- 1 `% _, ~$ C4 R* d& U B
- db = (g) => {//上层绘制5 w9 Z" I- O5 o/ }
- g.setColor(Color.WHITE);
w- y4 W& f5 W9 Q; s9 } - g.fillRect(0, 0, 400, 400);" K( \( g6 d" ]- d M
- g.setColor(Color.RED);
, Y; a% Y9 e$ y% k% b - g.setFont(font0);* W v7 }* [- x0 }
- let str = "晴纱是男娘"; ]& k3 C8 l0 \+ z S( H0 \
- let ww = 400;
4 D1 q" S8 T1 f3 W' @+ q5 ? - let w = getW(str, font0);
# L5 B& i4 W8 ^) ^# h( P - g.drawString(str, ww / 2 - w / 2, 200);: N# x; |- a- A5 O+ _2 G
- }
# l4 W/ t8 U. X' ? - $ ]+ \+ F" U2 F2 S9 `, N
- const mat = new Matrices();
6 E; ?0 x6 Q5 k. B7 J4 n - mat.translate(0, 0.5, 0);
* k4 \% J6 G1 H4 q7 q! v0 n% J - 0 {! Y2 l- U3 j! c2 n1 K6 }
- function create(ctx, state, entity) {
2 V ]- Y T; }# o- _ - let info = {# T x7 ~9 F1 X5 C% }
- ctx: ctx,
4 a: N! x L7 z4 ] - isTrain: false,! e9 T/ l$ s& Q& ?
- matrices: [mat],$ j$ M7 Y5 e1 o! }( N) _6 A+ l* P
- texture: [400, 400],9 |) _+ F* ]4 J
- model: {1 M9 F' I* y% Q( s& l- h, Y6 h
- renderType: "light",
7 @# [- q% {' \4 e: z% ?2 x; u - size: [1, 1],
6 g, X& E, A, _- a9 d - uvSize: [1, 1]
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- }
L& ~# Y. R# l" N" H% P - let f = new Face(info);
7 i8 Q+ d L4 m0 j: Q$ Y - state.f = f;0 {/ l3 a( M# x- \
L- d1 I. {' b4 A/ r8 g- let t = f.texture;; }7 j) B' l8 v3 ?, V
- let g = t.graphics;
6 `2 Y) R+ N) {) h* m - state.running = true;" [! O; W0 I9 l; f: A
- let fps = 24;# u$ Q( f& J* n$ r/ d; P0 l" m/ g' }2 Z
- da(g);//绘制底图
( a- C! y `) S - t.upload();
+ m( H) Y/ u9 e+ z) X: |7 M# W8 l - let k = 0;
8 M w6 I0 b7 S I0 C ^9 F5 M - let ti = Date.now();
* n4 y* a A& m# E# Q3 [ M - let rt = 0;
& l7 d' v3 b2 N' {. X( P - smooth = (k, v) => {// 平滑变化/ M: {" t+ b2 H+ C5 ?* _" D
- if (v > k) return k;
! r8 b8 b+ v) c) U% y! G - if (k < 0) return 0;
1 G! D! H5 g5 T; n4 y( k - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ X4 R) \ t/ S5 t b- Z' I: G
- }
% C! T' Q9 c& G' `" ] - run = () => {// 新线程
5 m+ p1 s$ v) D6 D; J) G9 g& { - let id = Thread.currentThread().getId();" W( S0 V0 f& `7 H- W0 J
- print("Thread start:" + id);
" E9 C5 f I1 V- S ]2 x1 m - while (state.running) {
0 S# m2 L: E5 W6 b# F6 B: d - try {9 W2 ?9 _# B, j- g
- k += (Date.now() - ti) / 1000 * 0.2;
/ }8 W+ n! _4 y1 y - ti = Date.now();
* X+ F* Z4 e: d: Y3 X& l8 n - if (k > 1.5) {
" X I: a+ @7 r7 U, S7 |# Y/ b - k = 0;
) s, V4 s9 n; p' ]/ o - }) \6 e* H3 b- u" Y& l* y
- setComp(g, 1);' K* ], S1 G/ Q4 ^7 F( F; N, V
- da(g);
' k6 d& J% _9 D7 U: u# [9 t& V - let kk = smooth(1, k);//平滑切换透明度
9 c& z# z/ B D+ o - setComp(g, kk);! }7 t- I2 e2 B
- db(g);
$ T0 O5 S0 f5 W% b: ] - t.upload();
: y C$ F% |1 W* ` - ctx.setDebugInfo("rt" ,Date.now() - ti);4 ]4 t7 j4 b$ V# S7 Z" ^" g: N
- ctx.setDebugInfo("k", k);3 W, l: [9 M% _
- ctx.setDebugInfo("sm", kk);
! x! J/ V6 g$ D. c" T# f9 H - rt = Date.now() - ti;
0 `9 Q* g, E! d& Y( o - Thread.sleep(ck(rt - 1000 / fps));
1 u( s& B: ^2 K+ n# _ - ctx.setDebugInfo("error", 0)
' D6 E" D, p. }5 ?) W( U5 G7 x - } catch (e) {4 \. t9 ?( H2 [+ G# J
- ctx.setDebugInfo("error", e);& E! r& ?8 Q/ C! |
- }- u. m# F D! C( S$ j1 N
- }
' }/ r2 p# \& l5 o# W6 h5 G! o - print("Thread end:" + id);" |; ]+ y- y, R( L+ @
- }/ T* r( W3 r ?8 B* D( D) A
- let th = new Thread(run, "qiehuan");9 g- J' Q0 _6 @8 x% G) p
- th.start();5 z4 \( B" `( G) C; Q# F+ c4 [
- }6 m& F: b# i- J" \/ e" S- W; B, p( o4 G
- , h/ K: J0 r- y9 W9 D
- function render(ctx, state, entity) {* q o. h, W& D1 e
- state.f.tick();
: c A2 Q* h& R% b+ t - }
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( b0 @) T) X" m' e& h- function dispose(ctx, state, entity) {' u1 Z, V: S: M. x: G
- print("Dispose");7 s% H% o2 v; V* D
- state.running = false;
( v7 D0 q5 _# P - state.f.close();$ Z% u2 j) k& R4 k2 J: X
- }
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6 J/ w0 }+ a0 I% T4 y0 u! [, k- function setComp(g, value) {6 J! t K& Y5 }" u; `" ? x# V: N
- g.setComposite(AlphaComposite.SrcOver.derive(value));- _' a+ I8 |' w
- }
复制代码 % J0 b+ [! y& f7 f: p
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。$ F: ]; c, p# C# p6 _$ E8 \0 q8 O
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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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