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" n" }5 A" x+ d: Q G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。; [( R2 b& D2 ^) ~" n- y
- importPackage (java.lang);/ y3 i$ a( J* n6 h) N$ a! Z
- importPackage (java.awt);
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- z2 k+ f/ v# p* ?6 s9 r* r) u- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" ~+ ?2 @! z( I
$ h/ {. Z2 |5 L9 K$ q) q- function getW(str, font) {
$ N1 j+ s9 R3 ^ - let frc = Resources.getFontRenderContext();, H% |! A: U h" E6 A2 i7 C
- bounds = font.getStringBounds(str, frc);
3 F, r+ p0 R% ~8 y) }0 b7 w - return Math.ceil(bounds.getWidth());, F' P: A4 k- O* i/ g; Z. p
- }
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- da = (g) => {//底图绘制3 s2 x y' N0 ~/ }7 D! L4 o
- g.setColor(Color.BLACK);
- l2 \1 G. t+ ]4 c: x# H/ S% Q5 ?1 Y - g.fillRect(0, 0, 400, 400);( J4 N4 e* i0 D( i
- } e! G7 a6 i! l2 j
" ~$ o/ \: u, x" O( Z1 C# l A- db = (g) => {//上层绘制
' C5 ~& @6 N2 E9 q' D: [1 o - g.setColor(Color.WHITE);: y8 Q8 ?1 f& c1 p. Z) B5 a
- g.fillRect(0, 0, 400, 400);
. J5 M5 D9 N" W4 V - g.setColor(Color.RED);) M2 F5 q/ X b! M" v% ^
- g.setFont(font0);
8 M) y0 B; k) W5 M* |; m+ ~ - let str = "晴纱是男娘";* `5 `1 U. h/ W4 P
- let ww = 400;
; P# {9 ]$ E3 u6 o' j% `: w - let w = getW(str, font0);
: d- m) @& z7 X3 ?/ d - g.drawString(str, ww / 2 - w / 2, 200);
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& ~+ v4 N5 G% z" s" O- const mat = new Matrices();8 u* N3 F1 i. G; Q# S- e- f+ H
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {* ]5 p. I% u: P' c1 D/ Y: i2 c
- let info = {
) x* {; Y! n3 s3 } - ctx: ctx,
' `% T7 R# ?" t& O( B - isTrain: false,; y; g* U! [+ C3 Y$ C2 b
- matrices: [mat],, T$ v* L9 I+ O( R
- texture: [400, 400],. {+ C& i; }4 t' v. A; Z& Q
- model: {6 J0 g0 `1 C( c8 x; ]/ `
- renderType: "light",
* F2 _ R4 a M& j* i! g' ^/ ? - size: [1, 1],6 w# \1 t: O0 U2 j/ z* u4 b$ `) Y
- uvSize: [1, 1]
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- }
; H$ L9 K5 {# w( J& b0 }6 O - let f = new Face(info);
2 ], N, F$ o: W$ B N. w6 w - state.f = f;
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- let t = f.texture;% Q6 s' }8 f) c% j% J2 E) D: c
- let g = t.graphics;; b; ~" l6 A- Z" ?' v1 U
- state.running = true;2 Y# j* q; G# n3 C s
- let fps = 24;2 A+ I& l1 {8 |( t* R( A
- da(g);//绘制底图
. m; ^: q# d+ A4 K' m- w! w6 j( _ - t.upload();) Q+ `. r8 O* Z: A$ e9 H( ~
- let k = 0;
[$ d5 i1 I7 U - let ti = Date.now();
. w3 W/ } B0 _ - let rt = 0;
: M1 J! p5 U6 ]* b& `' K6 r* ~ - smooth = (k, v) => {// 平滑变化
+ O/ F" |( { A$ s( t% r7 g2 J+ z - if (v > k) return k;% t" i. W8 M6 L3 T5 J
- if (k < 0) return 0;
8 ?1 R. Z& D3 j- c - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' D5 ?9 t& Q; }
- }1 y: @1 U* j5 B: n7 C( _8 J
- run = () => {// 新线程: h" H9 _$ a8 S' Y+ J& T @
- let id = Thread.currentThread().getId();6 q( v" H* a0 A2 W9 K
- print("Thread start:" + id);
; D" u3 i3 w0 f6 x# H2 c0 c - while (state.running) {& S; N1 a e$ A. ~/ V
- try {" b" Z6 y4 ~; |* Q0 b
- k += (Date.now() - ti) / 1000 * 0.2;% P. W6 Q4 [" H# S* t0 o
- ti = Date.now();
" i" V Y: V0 o/ Q) C - if (k > 1.5) {
6 z4 X6 [" K1 p- ]5 K9 j) X - k = 0;) F4 E+ Q- t0 O7 l+ G |, M4 P
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- setComp(g, 1);
M. z7 m& t$ w: Q - da(g);) ]7 K0 V$ w" M8 h, f
- let kk = smooth(1, k);//平滑切换透明度1 C4 e5 X& n5 C* N2 N- x" U
- setComp(g, kk);
" U h* |4 s9 y$ ^, f" Z1 w - db(g);
6 \: @ t$ C L% X: Q4 e4 H1 y - t.upload();
1 y8 L3 b$ V0 W1 ?, n2 X" t; W - ctx.setDebugInfo("rt" ,Date.now() - ti);& D9 W: U0 @* z" S9 p/ [ ~- j
- ctx.setDebugInfo("k", k);
" W: {5 q& K9 m8 K8 T - ctx.setDebugInfo("sm", kk);2 i5 R& w6 q' ~0 m6 O) t
- rt = Date.now() - ti;$ G/ E' V( A9 _3 _3 ^% {
- Thread.sleep(ck(rt - 1000 / fps));
, [: c+ l @- F: _$ P( L - ctx.setDebugInfo("error", 0)
/ ^: o/ _+ x' m% U4 h& s - } catch (e) {
0 p: `+ R* ?6 w4 O& h - ctx.setDebugInfo("error", e);
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- }! L- N7 j9 X5 [) {- }2 |3 {
- print("Thread end:" + id);$ y& r' t: A, i2 d' Y0 I
- }. E# P& ]; A0 L0 `9 z9 f/ e
- let th = new Thread(run, "qiehuan");" n ~3 m+ X2 G ?3 n6 S0 `3 c) W
- th.start(); S0 C8 w. R9 d' i) p! @4 a
- }
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# {3 `$ K) A' Y P) t5 g- function render(ctx, state, entity) {3 n% h/ Q, G' I4 |
- state.f.tick();
$ {5 ^5 T! w! }2 |3 T - }
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: H9 f7 G2 ` ^ X2 M# ?- function dispose(ctx, state, entity) {
. @2 d+ q# t; i ]) H+ B* q - print("Dispose");0 i% N* P9 m1 t4 s0 S9 ?
- state.running = false;1 T& _3 b" c/ \8 f
- state.f.close();
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- function setComp(g, value) {
; n' P4 F0 K( }& v& G% S - g.setComposite(AlphaComposite.SrcOver.derive(value));7 V, [, F+ f( s8 K* O y; i
- }
复制代码 1 t, i* f3 Y$ x( Y
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。
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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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