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% W+ p5 c& j- V# o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。1 _) m' G0 j7 [: N
- importPackage (java.lang);+ @& W1 s- X; P6 E( X
- importPackage (java.awt);# J/ o- F# y5 b' k5 g7 F G! {
- 9 u0 p& j% }; m8 ~; G) j/ g
- include(Resources.id("mtrsteamloco:library/code/face.js")); K! N( Y/ _1 @. X6 c2 W
' P9 _0 i0 T' M) s. P0 Z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: R' P0 N% K! T8 P% z; q
4 c/ S% G, E) f4 |- L; N# K1 ~5 @- function getW(str, font) {
+ i' e9 J( {# N1 m& v% L) ] - let frc = Resources.getFontRenderContext();
+ s6 N5 C5 S7 G ]/ d - bounds = font.getStringBounds(str, frc);
$ Z4 n; ~: h! U5 S - return Math.ceil(bounds.getWidth());4 l" b8 C1 K/ p* j. Z( ?
- }
6 E; {, N2 q! r$ d# a, ^- C
0 g; A6 d! Z% \, [4 c- da = (g) => {//底图绘制, M3 t2 |. \* M: S
- g.setColor(Color.BLACK);: E! w/ [- s7 K& I- R+ a4 \' O7 r
- g.fillRect(0, 0, 400, 400);
8 c2 b+ Y9 `4 [5 k& _3 x+ o - }
! B3 E, r* ^' S+ x9 D+ a" [) P8 A# `
/ j6 g/ \8 r6 S- db = (g) => {//上层绘制2 e7 \; K6 l4 q; I5 A
- g.setColor(Color.WHITE);
5 Q9 J/ z+ g) y0 A, X4 m - g.fillRect(0, 0, 400, 400);
* o) W9 K% i9 v v Y - g.setColor(Color.RED);7 P7 s7 C7 _" w/ S
- g.setFont(font0);
- X V! d0 a* W! B - let str = "晴纱是男娘";
' a) P. p% T, b) R' b. {3 ~ - let ww = 400;. w4 [" T! \/ E
- let w = getW(str, font0);
7 K' H8 t! Y6 Q- h* M7 i - g.drawString(str, ww / 2 - w / 2, 200);
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- ' w/ O8 Q; V6 j1 s
- const mat = new Matrices();5 j) J" C* N# X, k' e
- mat.translate(0, 0.5, 0);
N+ X) U& B) }) H6 _ - " K* q: G8 |. j% F, T) f
- function create(ctx, state, entity) {4 ~5 {5 _' i3 X+ X
- let info = {# @& E- ^0 R& N$ r. o
- ctx: ctx,7 H! t3 h" I- g& l
- isTrain: false,
8 q; S5 q& h5 H6 l; k - matrices: [mat],
! H' s5 i" T2 O7 @6 j0 Q - texture: [400, 400], \: t, J3 _/ b% `
- model: {3 s" N3 v) k* ^- y7 }/ ~1 G
- renderType: "light",- R. ?8 X7 k R$ z6 @
- size: [1, 1],; _# u2 d6 y6 t: [
- uvSize: [1, 1]5 K% _1 l9 s" [" r8 T( l
- }
2 e6 w: x$ g+ d" O x5 h - }
8 Y* D6 Y+ S, a - let f = new Face(info);
, C% _& I3 [2 b1 o4 @% h# C b - state.f = f;; D! i! Z1 b5 e
- - k9 G6 X" R6 r7 \9 B, L
- let t = f.texture; P1 f! L2 g) S% s& G
- let g = t.graphics;
. q& m w! W ~" `9 H - state.running = true;/ l1 b1 a0 ]0 M% l9 D5 L0 \
- let fps = 24;
% H& `9 F9 U1 c/ a& Y2 \" h - da(g);//绘制底图
2 g) w& i3 t" F- }3 p( Q - t.upload();7 x0 A# ^0 B. J
- let k = 0;: Y* T% m1 _/ V
- let ti = Date.now();' O, I: q* a5 V2 B
- let rt = 0;
9 i& W3 o# ^5 \. [ - smooth = (k, v) => {// 平滑变化
( i( j( P* O+ ] - if (v > k) return k;
" w& {2 h; Y+ Z- b# z% d - if (k < 0) return 0;
d& ?- i" H7 K4 t; N7 W - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 B. r1 _1 ?: n+ D4 l2 _ - }
4 ?+ I4 y: b7 M% n1 W8 E$ C - run = () => {// 新线程& d2 v- I. [2 O$ F! N0 ^
- let id = Thread.currentThread().getId();
# F4 ^* y+ ~; a3 Q - print("Thread start:" + id);
+ Y3 p% i1 @7 a& }2 u - while (state.running) {
( [ n* U* |4 F1 p3 Q$ g# _ - try {8 R# s9 p9 ^) R8 i5 B0 L
- k += (Date.now() - ti) / 1000 * 0.2;
4 `, ^ D7 E) s; J/ Q - ti = Date.now();3 ~- `# U. t- G, ^
- if (k > 1.5) {
; K5 w- e. a# w0 q* ]. C+ P4 R - k = 0;
R, r% O0 l; K. ~ - }
3 ?: s+ s" d0 _+ o3 j- ?+ J - setComp(g, 1);5 ?/ r6 ~3 P c! y1 M
- da(g);) T# Q; C) P V$ x) L
- let kk = smooth(1, k);//平滑切换透明度 J9 U5 L2 J% y6 N- [! Z( y
- setComp(g, kk);9 w* V9 M1 C' t/ O6 q$ p
- db(g);
# [6 }; o6 U! }% G - t.upload();; k- |& j0 D# _) R C0 ` g3 L
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ g! c/ v: j+ A
- ctx.setDebugInfo("k", k);0 B% E. t0 U/ ?
- ctx.setDebugInfo("sm", kk);
4 z. D9 O- V$ P }$ _ - rt = Date.now() - ti;
. |, V/ y2 d$ c0 j - Thread.sleep(ck(rt - 1000 / fps));
' C! g1 k9 v( b% O2 @% z - ctx.setDebugInfo("error", 0)
% u( _9 H* k, s% t/ u4 |' o; r - } catch (e) {# ?( p* d, J9 l0 x/ f: Y! V
- ctx.setDebugInfo("error", e);
4 s7 I5 l7 p; d w - }& M b5 Y/ W8 l# y+ }% n
- }! Z1 x7 U7 R E# R; i
- print("Thread end:" + id);
8 B* g# w& } s: e* o - }6 N1 X. o, o" Z, q- m2 r4 s
- let th = new Thread(run, "qiehuan");
3 f& o5 \+ F! c! r9 m( L; ~ - th.start();4 K8 n! ^7 b- f# e
- }9 `9 v7 `! ~( K5 T
- - K |2 L( y. B3 J7 I
- function render(ctx, state, entity) {0 j6 N, E6 a- U! v+ q
- state.f.tick();
% {7 A0 o5 U$ u( t - }" r* w+ q( `/ I; a( ^
- r& @4 ~$ g/ ~; F& Q1 c; P
- function dispose(ctx, state, entity) {5 p2 l" T- }" d" I9 K4 w+ w
- print("Dispose");: p {+ l; w y( T! s6 ~3 _
- state.running = false;. [2 ~/ |) B6 F
- state.f.close();4 t; s: |& d& r: U" o
- }4 g1 F/ E: X3 e' ^! E
7 H5 W8 w4 i: x% T/ @- function setComp(g, value) {
/ t! [- I4 k6 j5 R - g.setComposite(AlphaComposite.SrcOver.derive(value));, u* F" }' e# B$ O. D/ R
- }
复制代码
. x& K4 y+ Y- r+ z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)9 W4 q, e1 h4 K1 V$ i2 @, h2 z- J- D
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