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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。
$ C& A' G9 r8 V7 }- j# g0 A- importPackage (java.lang);
8 k5 D" l. U# n - importPackage (java.awt);
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5 V4 y ]6 P4 X4 D- include(Resources.id("mtrsteamloco:library/code/face.js"));
9 }3 \! r' ^* }' S5 n4 T3 T
" ~9 F4 ?0 c5 N" Q9 ?' m4 @3 N& P- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);0 k& G8 C; j/ }/ Z
/ j9 a3 b; Z8 N1 a- function getW(str, font) {
* h8 `' M& F( w7 x) n - let frc = Resources.getFontRenderContext();, x$ ]: c: G6 _% z( y R& ?
- bounds = font.getStringBounds(str, frc);
8 O1 z% f/ L! ]' e7 @" p. H) ] - return Math.ceil(bounds.getWidth());+ K1 C+ V- Q: Z' s Z& H4 v4 g7 U/ o
- }* w7 ~3 @" e" L5 ~: f1 T b0 K$ p
. f$ q [" r. L$ `# K6 u( T b! P- da = (g) => {//底图绘制
' h: g$ Z) h9 [: S" P0 e - g.setColor(Color.BLACK);6 x! v2 @3 n* v9 Y
- g.fillRect(0, 0, 400, 400);
/ t+ h5 i; P5 z% ^/ ~ - }% ]( B; k' f0 l
- & |% A4 O& j$ T) R& _0 p4 k3 c
- db = (g) => {//上层绘制
) i( b* t" u. O - g.setColor(Color.WHITE);# }7 C. o1 i; {+ _. g" r. ]
- g.fillRect(0, 0, 400, 400);5 b) @: Z* k% ]
- g.setColor(Color.RED); M$ |* f* z# y# K1 z$ [
- g.setFont(font0);# Y% ?; S" s; M" S* E
- let str = "晴纱是男娘";
1 D5 J7 @' j8 L- @, e, o4 ~" R - let ww = 400;
7 G: \6 d1 I/ Y/ C- S - let w = getW(str, font0); _' ] @$ m0 O4 [6 l" G# w% [3 z
- g.drawString(str, ww / 2 - w / 2, 200);" m3 g8 P- a# T8 _
- }
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7 W' V! J2 y" J' `. ?/ V' p- const mat = new Matrices();7 {; z* ?9 m: j3 F+ h* [2 F& @
- mat.translate(0, 0.5, 0);
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# N' [6 E; ~, l% F- function create(ctx, state, entity) {% \* }3 j9 C4 p8 B P
- let info = {
( n3 ~: f; r9 w" K7 L9 x+ e - ctx: ctx,6 J: X7 a5 I/ r# }9 r4 }
- isTrain: false,0 ]! {' `" w5 B, A
- matrices: [mat],: N2 k t, U; H+ ]9 p6 }4 f W
- texture: [400, 400],! c$ A+ z2 ]7 t
- model: {$ T9 M! |+ l) w5 I
- renderType: "light",/ { I1 z+ X; ]. S7 E2 R
- size: [1, 1],$ F+ v* e J) W0 b; h9 B4 S% T7 W
- uvSize: [1, 1]9 B1 A: X. r- c% F5 z% m( g
- }
1 k' ^$ p3 D G - }2 D: C3 O2 y$ m2 t' `5 j: f
- let f = new Face(info);7 g7 S9 o7 u' |. m% @. {7 q# l
- state.f = f;' Z2 V1 ]5 z# p- w
A! A/ o8 I! f; b) O- let t = f.texture;" C7 Y- J2 U) v+ Z
- let g = t.graphics;( M9 x, t* X' P8 `+ `
- state.running = true; j. k9 W: F0 _: |7 P% G
- let fps = 24;
( u4 b4 E( c) c* N8 N1 N - da(g);//绘制底图
+ v" X1 `5 ]& \) I6 @, Z3 r; r - t.upload();
5 p2 e/ o+ L5 B3 \$ o1 c. p - let k = 0;
- ]6 m* E7 ]! I- l - let ti = Date.now();
1 n) W: G4 u3 x7 J: L+ | - let rt = 0;
, J' G) U$ ^7 o9 Z - smooth = (k, v) => {// 平滑变化
1 j' B W( k. e/ d2 h/ h9 A4 x8 t2 H - if (v > k) return k;
5 K' n5 o" I' ~ - if (k < 0) return 0;' n& c+ @* x3 \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
! D1 w; v; }/ K& T- N ] - }
! @! \5 f3 `# R" k' m - run = () => {// 新线程
' D% A, M. j3 B% t3 m; Z( j - let id = Thread.currentThread().getId();
' y1 k$ o0 a: p/ q# T4 E+ V3 ?0 q - print("Thread start:" + id);' c. L' Y" R6 u2 W0 u1 Q
- while (state.running) {
- s) `8 u6 r) b. \6 H9 ~ - try {+ i$ A' E1 Y( X) D* x# U
- k += (Date.now() - ti) / 1000 * 0.2;2 [" y2 y" q; j; {6 q6 _% v: r
- ti = Date.now();
1 C, N- q! f8 D) l/ A; s9 |* q - if (k > 1.5) {4 d5 k4 E1 E0 X$ ?8 j
- k = 0;
) f+ Y, p* ?9 D: E0 J: W - }
+ T* _2 l' D8 K; l9 u: M |( | - setComp(g, 1);+ S0 n. E5 t3 o6 J5 J+ K
- da(g);, y4 u7 W4 y' J( ^8 A# T! E
- let kk = smooth(1, k);//平滑切换透明度! d) k5 L G' ^
- setComp(g, kk);
4 B+ @7 j+ I( Z - db(g);0 K. F( h& }& V3 O8 ~ z
- t.upload();
8 N) {' v+ A- | - ctx.setDebugInfo("rt" ,Date.now() - ti);
& ]0 W0 m3 a2 L+ Z# u+ p+ H - ctx.setDebugInfo("k", k);
+ Q5 l' F3 I# s/ S- ^8 c2 h. U- V - ctx.setDebugInfo("sm", kk);
+ b" T7 s& ~ G3 M# l$ l - rt = Date.now() - ti;4 b) @" k+ d/ s" J, e2 J; T b
- Thread.sleep(ck(rt - 1000 / fps));
4 V" i! f9 r8 B: m7 n$ n - ctx.setDebugInfo("error", 0)7 W5 t" |( s2 G) L, M ]' p
- } catch (e) {
7 Q8 {: E3 P/ r# N+ B+ z - ctx.setDebugInfo("error", e);5 x( u( z0 T0 F6 |. v
- }
2 [; v* c$ O* [0 C - }7 d: J" c$ n4 H& o6 e5 f
- print("Thread end:" + id);& U1 l; U' |! r, \: b [# G
- }
$ h) V. e6 e! D' u2 A r$ i! J - let th = new Thread(run, "qiehuan");. G( K& h2 e6 b8 h. ~; P$ f
- th.start();$ p# |3 q0 l% T% Y
- }+ F/ x4 e; V+ L& y
: a3 K) m' r6 \1 U' x- function render(ctx, state, entity) {
. ~; K% X- F1 |/ y) a7 v) ^3 ?% B - state.f.tick();6 `7 }% N+ o8 P
- }2 i) a' O/ u6 g. ]" R7 N, A
- 5 @0 L1 d; [/ f3 S t
- function dispose(ctx, state, entity) {( L! |2 h5 i5 i! R
- print("Dispose");5 L6 u2 s( K" I2 }
- state.running = false;! I3 v S5 {+ ?0 \
- state.f.close();2 S2 b0 L8 g9 m9 [( ~+ a
- }
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4 K7 s0 s; E8 t* b# U) T$ n5 N- function setComp(g, value) {
9 B( y, H/ U4 m2 a- C K" v1 o' C+ g - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 n! @# B1 K6 }0 W9 K; I" n - }
复制代码 ' N7 U4 {- q3 C" I3 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。9 S, o2 L3 o9 }/ i' Z
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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)% U! y* Z8 V# L% e7 [7 g
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