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* l6 D( o! C1 b; e1 u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。
+ N& P8 }& N7 A% M/ k4 K( ^% a- importPackage (java.lang);' T" s7 Z' b& B* l( ?. f+ \
- importPackage (java.awt);
$ h0 w( @( {( P0 {( X; Z - + K! |; Q* I: P! S5 J* ]
- include(Resources.id("mtrsteamloco:library/code/face.js"));
* W, m5 I0 W+ ?; h. T$ W4 T
- g' D6 {8 q/ n Q% y. |- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {7 _2 X, O- I: `( ]9 Y* Q
- let frc = Resources.getFontRenderContext();
' p7 L `( u5 H, v. t - bounds = font.getStringBounds(str, frc);7 M5 T2 u; C, ~* N
- return Math.ceil(bounds.getWidth());
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- . z: t- U f7 T6 ?
- da = (g) => {//底图绘制! P% l X" |, j6 H
- g.setColor(Color.BLACK);; L; ] Q' n7 D5 K8 p% |
- g.fillRect(0, 0, 400, 400);( h2 }, I- s: {6 v" s* i
- }
; Y) s* q1 }8 b. `/ _+ G
4 w& J, H. ?& X- db = (g) => {//上层绘制! d; X! k6 C2 g( ?
- g.setColor(Color.WHITE);3 @ J$ U. [: w' c4 s9 J8 T
- g.fillRect(0, 0, 400, 400);. ]( h; N+ g f* H7 g$ t
- g.setColor(Color.RED);+ F' t/ ~& \: ~$ S$ w7 d
- g.setFont(font0);
* o9 ?2 @4 A7 R5 B - let str = "晴纱是男娘";- h% K4 A" \# W) l/ `9 p+ |9 n! Q
- let ww = 400;
: D9 S5 f; Z) t$ l2 W6 L - let w = getW(str, font0); g" O* ?6 P/ ]! g* G! M* M: Z. `
- g.drawString(str, ww / 2 - w / 2, 200);/ R2 F0 i8 D2 L" l j: G, Y
- }
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3 i( b! m9 c% a8 x; x% B' k- const mat = new Matrices();
7 d) G; m- @* W) t, D4 i1 h* C - mat.translate(0, 0.5, 0);& W) ~! U+ {, @2 O' l+ S
% X8 ]; `. d% Z+ V) o* K- function create(ctx, state, entity) {/ F @* G y6 F; s% X( |
- let info = {
% ?% [) R/ Y$ z% a1 s& q, L* b: f: d - ctx: ctx,6 z1 V6 \8 `; {6 q6 F
- isTrain: false,, n2 \1 i/ Y9 V! i3 X7 q. t
- matrices: [mat],
) p) w- ^0 u. @ - texture: [400, 400],
: H' A/ [% p5 x3 G. r5 M - model: {7 q: j W S R" F6 `& u5 D
- renderType: "light",
3 c6 L" {! r& i& U - size: [1, 1],
! K4 N3 {' ^: q" N* |' C. p1 |3 _ - uvSize: [1, 1]) Z" ^7 I% J. |$ e6 A0 _
- }2 v |: D, R7 K. [ y$ P: ` r8 X
- }
2 D/ A9 U" _" `( a; i" u9 B - let f = new Face(info);
! q" i) `3 D- z0 x, I5 E7 ?) P a - state.f = f;
" W2 `! n1 m* y - " [1 C4 e' u7 G7 c) q3 H
- let t = f.texture;0 F6 Y7 D9 Y2 _6 |' T
- let g = t.graphics;
+ }: u5 I7 n+ ^- `6 ?& p - state.running = true;' E% k7 e- e; Z' F3 }; w0 A
- let fps = 24;) U5 G# F7 e. b' | a
- da(g);//绘制底图
1 I$ b' |% C1 Z! o - t.upload();5 Z: m! T2 g9 x; v2 o8 d
- let k = 0;3 g1 Y) L2 N& ~! s" l) c. K' W3 |( c, g
- let ti = Date.now();* ^( R6 P: ?# S; n0 H8 o
- let rt = 0;5 O. y- O( m* S5 v2 a& l
- smooth = (k, v) => {// 平滑变化
- k1 w& Y. s- R$ L) \5 _( N - if (v > k) return k;- o6 w. \8 j# W7 G) G n' q g( D+ r% V
- if (k < 0) return 0;
2 M' t0 Q) G6 }4 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 x# Z& S+ i: Q7 S! a7 w W
- }* y. S& m. w8 p/ }
- run = () => {// 新线程
9 @ H( ^/ S* x - let id = Thread.currentThread().getId();: a' L$ C2 W$ Z1 S. }
- print("Thread start:" + id);8 Z+ _- j% F! p+ P7 T/ U; p
- while (state.running) {) h8 I: l( X( }4 W3 K
- try {
}5 S* Z1 J) P* j" Z+ F1 B) f - k += (Date.now() - ti) / 1000 * 0.2;
1 f6 i) \' R! h' k- J# w# I { - ti = Date.now();
- Z$ {" d" f8 {& L6 p - if (k > 1.5) {
& P s9 v- K2 |; {1 L3 B3 }2 a0 W7 Y( D - k = 0;
) O0 Y6 X4 t7 u# q; J$ U: O - }
! @4 X# }6 I5 p# G: ]; b- c - setComp(g, 1);
6 L$ ^' y8 T; G8 L ]8 P! q5 r - da(g);. E* t8 R6 c- Y" Z8 r7 T: ^
- let kk = smooth(1, k);//平滑切换透明度
) ?" W) O" _8 x( Z5 l: e - setComp(g, kk);
) B) ^. X- G) x ^ - db(g);
6 A/ {1 U& h7 t2 c - t.upload();
, `: }8 n7 d8 W - ctx.setDebugInfo("rt" ,Date.now() - ti);) }& K7 ]! h3 `$ u+ N
- ctx.setDebugInfo("k", k);9 F& Z/ U( e' p+ q
- ctx.setDebugInfo("sm", kk);/ i# W0 c6 I0 s) n& V
- rt = Date.now() - ti;
% l* o+ D. ~' O( y: B - Thread.sleep(ck(rt - 1000 / fps));
# V* w: E- E; \) ` - ctx.setDebugInfo("error", 0)
, `1 f" b) I P7 p9 N - } catch (e) {& ^7 g+ k/ @7 f5 N' b( f# }
- ctx.setDebugInfo("error", e);+ A7 a% H: @6 m$ ?9 r
- }- l7 L9 X& l' Q" X" U: K5 \9 S- k% x
- }
. B5 c q$ @$ x. j7 v - print("Thread end:" + id);
7 x. _- k' ~& q& x2 d5 L - }
/ |5 H/ c& ~" V- P s+ J - let th = new Thread(run, "qiehuan");
* }) x/ F# ?0 E0 a, x9 Q( X$ n - th.start();
6 N! ^1 b" e3 \7 k7 x0 i - }3 q+ y- H9 B* ]
- . Z6 N3 G0 w& _6 J) J
- function render(ctx, state, entity) {: o- k7 a* r3 J4 g. J
- state.f.tick();$ |! A& [2 g3 A) \0 e; B9 Y
- }
! F# G/ _; v' C/ Z - * |9 }; Y6 Z- _ \: E( q: {
- function dispose(ctx, state, entity) {) Z! X" D9 E8 ]9 }# s. Y
- print("Dispose");
; S1 r# D/ G4 O J) U, | - state.running = false;+ ]. N% Y8 w' S: V( d" [0 f
- state.f.close();1 S P- D3 v; t$ G5 j
- }
8 c3 N7 I7 u# N' p o9 ~6 p
7 h8 t7 P& b9 a; X. z- function setComp(g, value) {. A) `" x7 s) _% h) M
- g.setComposite(AlphaComposite.SrcOver.derive(value));& D# o' N+ o: _* i
- }
复制代码
. Q3 h e- Q: F. D2 B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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. ]# p% Y+ k0 K$ t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( ?2 |, k- q* K9 V& R" X: J& O4 R
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