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; y# S( u, n0 O d m/ ?* M% z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。
3 `7 Q9 U& ` R+ z- importPackage (java.lang);
. A5 J& S9 F& {, S1 d1 l - 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);
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2 V6 D8 @' @+ V1 }( p8 Q, y; d- function getW(str, font) {0 A9 U, a: t( z! O8 { f* r" }; C
- let frc = Resources.getFontRenderContext(); J) x E' a( U1 z2 R$ `
- bounds = font.getStringBounds(str, frc);9 \6 W) x) Y# t
- return Math.ceil(bounds.getWidth()); }- v; V( T' @. w$ ^+ j
- }8 K% }+ ?3 l9 D" e/ E( o7 t/ g
8 m% Q i5 L1 s% f- da = (g) => {//底图绘制3 ^- T6 b0 v- w; l
- g.setColor(Color.BLACK);; T) P5 y$ U% R, V
- g.fillRect(0, 0, 400, 400);
\3 q$ z6 a9 t2 b, y - }
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- db = (g) => {//上层绘制
# N8 f5 ]7 S8 T6 L5 B8 I7 G - g.setColor(Color.WHITE);
0 w3 ?: ~' o* C- \ - g.fillRect(0, 0, 400, 400);1 z0 \* ^! v& |( h6 S' v6 D- v
- g.setColor(Color.RED);
9 C, M# N/ ]" }7 Z - g.setFont(font0);+ E& ~7 S2 i) b! r; B" R
- let str = "晴纱是男娘";
: e! v. u7 R( o" P; ^! x3 L- Y - let ww = 400;; ]" h/ _. o6 I6 o1 B3 s( c
- let w = getW(str, font0);6 u) H5 Z1 L( L+ j% Q
- g.drawString(str, ww / 2 - w / 2, 200);
( r! E8 R3 A, R6 X2 W8 \$ p* _ - }
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$ K8 Y( w. c/ }* ]) J& j! C- const mat = new Matrices();# J+ H9 m- a. b9 G! ?
- mat.translate(0, 0.5, 0);* ~8 m- C; i& P1 s& D- L* S2 J
3 I. U. q) t9 Y$ n; M) D& G- function create(ctx, state, entity) {$ x* z! c: C- y& Q7 q
- let info = {) n9 }7 U5 G S# M: B5 n
- ctx: ctx,
# U( ^) t$ e1 o2 u - isTrain: false,
5 u7 A" O( o/ }2 ~; @ - matrices: [mat],
6 ?# l) o) o& ]+ R0 a6 w5 N) r - texture: [400, 400],+ j& }( f% W" S$ l( w K
- model: {
8 N0 L$ {7 N5 D4 Q/ }# ]! s4 j" H1 R% Z- ? - renderType: "light",
/ v3 ]# M+ p3 _: E7 G - size: [1, 1],
3 {* t8 a* g3 K e2 Z3 b - uvSize: [1, 1]
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- }
2 Z1 X) E& m, v& H - let f = new Face(info);
" h; v& \4 D" p+ k! l8 _; H+ H; ^- P - state.f = f;# I2 a0 [. \" r; E7 [; N* V
' D/ t8 P2 @2 P+ D+ v- let t = f.texture;
9 h" F9 X w; h - let g = t.graphics;
8 q! n& L5 J/ I, ~2 g5 i+ R - state.running = true;
; |$ @# v: d$ g5 ~1 n - let fps = 24;
, y5 R# p! v ^6 S" A. t - da(g);//绘制底图
& h/ B6 a# U2 w% ?/ O9 J - t.upload();$ P/ X1 z! _. Z- X8 X$ B
- let k = 0;: z6 N! @9 l D/ {1 K
- let ti = Date.now();- e/ S4 \" h4 ~5 F# y+ V4 l
- let rt = 0;% Y. Q% d) c+ K6 d
- smooth = (k, v) => {// 平滑变化
, W9 J& w# s) \3 j - if (v > k) return k;
8 p; {& E' `# ]1 X% [; }5 F/ F _& y; Q - if (k < 0) return 0;$ F$ S: d' v3 B1 h6 N3 x& \ W
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 b9 ~) }* w$ C3 W7 }
- }
+ l6 b- N4 V5 V: a( \ - run = () => {// 新线程
( B) u. ~) ]+ t - let id = Thread.currentThread().getId();# x0 A. D! s" O5 S4 N
- print("Thread start:" + id);! a1 T) M8 J, g- E
- while (state.running) {0 [0 z6 [6 Y3 D7 O! x
- try { V9 M O3 _( w
- k += (Date.now() - ti) / 1000 * 0.2;. {3 i) I) N" `
- ti = Date.now();
0 T# t) |3 q# P( m - if (k > 1.5) {# l7 n0 `8 M% J0 E
- k = 0;; o6 ^# K# Q- y; t: F+ e
- }0 m. C- e( z0 H# w
- setComp(g, 1);! s# ^) V& R! s' y8 s" R
- da(g);' |' v) u+ V! L
- let kk = smooth(1, k);//平滑切换透明度9 M+ }0 {) p# j9 `+ _. Z/ R" v
- setComp(g, kk);
0 Y* b( s: H1 o- u9 `0 M - db(g);
}( k |+ F2 E- D - t.upload();4 i! n0 D- u& e/ z
- ctx.setDebugInfo("rt" ,Date.now() - ti);
0 @% _/ t7 x9 k- N8 O. B: } k - ctx.setDebugInfo("k", k);# j* e5 z' h8 n6 Y2 M) N
- ctx.setDebugInfo("sm", kk);
4 c" [- F _4 \" C - rt = Date.now() - ti;
# K% d6 N0 M. i8 B$ |7 f( @" Y - Thread.sleep(ck(rt - 1000 / fps));
) P+ y0 @, G( R' W% J& n - ctx.setDebugInfo("error", 0)
( U4 q0 m2 a0 {. Q& U. @* Z W/ { - } catch (e) {: m* s) p2 z: w9 F+ B' s( X M
- ctx.setDebugInfo("error", e);5 m9 C- O1 W# ~& H$ G- V3 v X) |
- }' A4 `0 B! G: ]
- }
r6 F' q8 U5 B7 J% B - print("Thread end:" + id);
% I& y4 L2 K7 y1 i! }& y1 Q5 R - }
R- u) }. d! N8 } _: { - let th = new Thread(run, "qiehuan");& W# t4 D- ]8 C7 }. N9 A
- th.start();
; f7 Y* W- H2 G5 f: d - }
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- function render(ctx, state, entity) {+ t. y0 ]' r: y6 X5 ^+ q, f W7 o
- state.f.tick();
' p5 U: ^: Y" y- d( o2 {- Q3 c1 v - }
* Q' Q& X% Y G. S; N# {
5 S" q5 ~; T& q- function dispose(ctx, state, entity) {
+ l1 S C& _( W. r& d - print("Dispose");2 F9 g! ]/ `6 X+ J# Z9 P
- state.running = false;1 z3 R' r/ h) P/ l8 H
- state.f.close();, {2 J3 t1 ~& ]7 E4 ~7 \0 X& ~) J1 r
- }
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. p4 q3 D5 R7 U* h, N' G- function setComp(g, value) {, x; d) {% m+ I; a, O
- g.setComposite(AlphaComposite.SrcOver.derive(value));: ]+ E% z6 O8 `3 P6 H' C* K
- }
复制代码
# J4 N- D; `! I! e( q0 I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。! T" X& T( e+ A1 P! {
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6 p$ ]9 a; y# l$ b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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