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4 x9 l6 k7 M; g6 n* c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。' i3 K1 N( y( i- k o- x4 ^
- importPackage (java.lang);" }3 E( w2 |# @$ [ m. R0 _
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 Q v/ w- r" x" P& \: X
4 b2 g3 L9 o/ S! h( W& o- function getW(str, font) {
$ b& L3 Q0 c& w: e; g% d7 ]' A - let frc = Resources.getFontRenderContext();
9 }4 C1 i' z4 h- l1 J - bounds = font.getStringBounds(str, frc);
, k8 f* D4 R+ |8 q% j& D! E6 t+ c# |6 U - return Math.ceil(bounds.getWidth());' ~) F" S" _& v1 g1 t& Z
- }
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- da = (g) => {//底图绘制( s- X2 F3 S/ f) O% A2 D! r
- g.setColor(Color.BLACK);
( x; v3 a1 R4 K8 [4 s8 r+ B - g.fillRect(0, 0, 400, 400);' f1 z/ z$ r& R" x% [- a1 L, O
- }
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2 o, r P0 I. l E( k- db = (g) => {//上层绘制6 @& `( k7 r( _3 P. X, u3 |" v$ ^
- g.setColor(Color.WHITE);- ?" ?7 G) k* o: i/ O
- g.fillRect(0, 0, 400, 400);
' F6 N- X7 v! T" Z - g.setColor(Color.RED);: c! [# m& w+ j9 f5 ]7 f& b
- g.setFont(font0);
5 n' {- Y4 l) o& Q+ l5 Y5 a - let str = "晴纱是男娘";
( ]) t/ w$ W# I2 |) z" t4 q - let ww = 400;/ m2 C: g( `2 P
- let w = getW(str, font0);1 c0 y# k& ?' N4 \7 M
- g.drawString(str, ww / 2 - w / 2, 200);9 _2 r3 E1 y6 i7 [* {7 f
- }8 J6 S1 C2 B" n( [: D
7 f) l' r& G$ ~; I% x( k. P- const mat = new Matrices();( K" P" E" k1 d. {/ q, _
- mat.translate(0, 0.5, 0);) r7 T2 [2 ?& _0 ]0 l) ^
/ v: G8 v6 J: d6 x8 D" `/ [% V- function create(ctx, state, entity) {
: R( t+ @6 j8 b d/ I, H0 B - let info = {
& e1 T1 S$ S1 N+ G' K4 d1 r; A - ctx: ctx,
. y- B: y# Q) J, b* r9 D! r - isTrain: false,/ ?% A3 g' `9 } n! k& B" {
- matrices: [mat],) J# G. D6 y9 g3 ~
- texture: [400, 400],$ Y: f, O6 W, |7 [9 D7 Y7 s, b
- model: {
/ b6 `5 X4 O% C% d, z6 s - renderType: "light",
* g; c5 m& i( k7 C0 u7 ` - size: [1, 1],
+ \2 H+ e& u9 z: X - uvSize: [1, 1]% @2 ]8 d+ ~8 w. K1 B! K9 i
- }
$ o) v3 q: ?! q- J. J9 S! D' o - }' W( d/ z7 D# [; U1 ~" n; @
- let f = new Face(info);
0 {) @! ]3 }, Q; B8 S+ a/ O" c - state.f = f;$ l+ {% O7 F y: I8 e
- + J/ K o5 A" x% R) N
- let t = f.texture;
* N" G5 n# d- _- I& s- ~ - let g = t.graphics;
" A$ d0 s% G& o6 p - state.running = true;
. v+ y3 @, {5 ?! \. \+ l6 q: ~ - let fps = 24;0 k+ b9 ^# P* g7 Y% T8 |: L
- da(g);//绘制底图* [) r, E t9 O# t& l; _
- t.upload();
/ v5 ?3 a( {+ d# N8 \4 i - let k = 0;. h1 F( Z k! q/ i. u7 i4 q; E
- let ti = Date.now();; W- _1 U3 Q3 {* c( `
- let rt = 0;
) Z# X3 k3 z: Q r - smooth = (k, v) => {// 平滑变化& _( N3 ?5 A! q3 t: T
- if (v > k) return k;
+ e* Y/ Z+ U8 S& B1 X - if (k < 0) return 0;
) q" Z3 t5 h0 M" g$ \ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; {9 u. K& v4 y7 o; l+ S s9 Z
- }
p2 b# P; @* K) N, M - run = () => {// 新线程- J' c+ p$ [9 k, ~5 c; l
- let id = Thread.currentThread().getId();
2 G3 j8 J) Z& t2 ]( r' B7 w - print("Thread start:" + id);% v6 c8 A1 G2 R8 N3 P
- while (state.running) {
! D+ J _8 [6 f; R! d5 a - try {
9 d1 ?! B1 F8 {! ` - k += (Date.now() - ti) / 1000 * 0.2;1 E8 W3 P) w8 ]7 O4 y+ j v: [
- ti = Date.now();
1 h1 J- U3 E) G g0 c9 m# C' h% y! o - if (k > 1.5) {
! E: @2 f* t: c- k. K - k = 0;6 D7 p; W/ C4 i' u* `0 A
- }
9 q( C4 h6 h4 e3 e - setComp(g, 1);
7 k i! }0 q& P' l8 z4 E - da(g);
; v' }8 X$ s1 z4 \! N1 g - let kk = smooth(1, k);//平滑切换透明度 A8 u7 l0 U2 W9 S) S
- setComp(g, kk);* l, x9 d" j) w- y- r
- db(g);
) H8 y, z( u1 B4 A/ l - t.upload();8 n g8 z4 Y& L" d0 b
- ctx.setDebugInfo("rt" ,Date.now() - ti);
# G3 Y- R# X1 D' u a - ctx.setDebugInfo("k", k);
) O5 D3 z1 b+ `, Q; G% P8 Q - ctx.setDebugInfo("sm", kk);1 b c8 W+ A9 Q, t: m Y% R
- rt = Date.now() - ti;1 v) ^8 \0 V6 C8 r
- Thread.sleep(ck(rt - 1000 / fps));
1 e% }9 o6 {3 P* k' n8 E, B - ctx.setDebugInfo("error", 0)8 u; T$ H; {- L3 j( D* }
- } catch (e) {% R; n$ p. V1 V
- ctx.setDebugInfo("error", e);" |4 y' ]6 R0 h9 a j J) e
- }
. h% ^4 n( u9 F" a - }
A7 \: k0 z0 f! e# i - print("Thread end:" + id);* n8 k G$ `& S
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- let th = new Thread(run, "qiehuan");& E7 v z7 V! \2 R/ O9 ^4 x" S
- th.start();7 K o6 t9 T: q6 O0 V) T1 m
- }
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" T1 m, p v7 S0 {7 f/ J- function render(ctx, state, entity) {
1 z, E" |! D3 L4 t - state.f.tick();
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2 j4 ~# R% h% K; W3 E( V' \- function dispose(ctx, state, entity) {
$ E. U2 }6 F! f8 | - print("Dispose");5 c' B. A+ ]4 x" ^, |
- state.running = false;6 o' R$ b0 b1 g8 L& P0 b$ y9 U) P: ^; [
- state.f.close();
6 U# W% w* z5 t& N2 I z - }
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; I& s, U6 R" X/ w! H# l- function setComp(g, value) {9 b. G) @% ~: D2 L& T
- g.setComposite(AlphaComposite.SrcOver.derive(value));8 [- p ^ R) n! m" C
- }
复制代码
* ~4 J% u% p' ]2 H- N( }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)% B- x+ V% p" g' W
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