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5 D! A4 }) y& M" x8 y5 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。
( ^7 h# _/ |7 w# ^$ y- importPackage (java.lang);+ N& O% c, B! H" a7 n1 g
- importPackage (java.awt);$ l2 h; y9 @( c9 @! K0 J
- 9 v( T4 n# M% D# R+ j4 }0 E
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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0 u9 }9 o4 k6 [$ J& }- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- F! X3 l, r- i. T2 Q% a - 1 O1 h) w' s4 f, N
- function getW(str, font) {
- Q6 S5 W. |$ k& r$ j' h- {: i - let frc = Resources.getFontRenderContext();
* Y5 ?; o4 o# ~0 M5 D" C. `- c - bounds = font.getStringBounds(str, frc);. r! D& o8 L( x6 r
- return Math.ceil(bounds.getWidth());
; a$ C; l; B: F. m% I7 b1 P6 R. {, ^ - }
- i" I p( b& K( ?8 @. [ - 4 W( b& W) B, R9 B
- da = (g) => {//底图绘制
; o# U) F, `3 I& @) t# } - g.setColor(Color.BLACK);8 x+ \+ G+ Y, y
- g.fillRect(0, 0, 400, 400);
+ T* I( X- w# T" ~+ e8 [. e - }
8 B D, H( j0 X+ a
J% h( S* S0 D+ W; ^- db = (g) => {//上层绘制: \8 `( J6 Q2 k; L1 ?
- g.setColor(Color.WHITE);
( |( P& @0 R9 ~9 u7 z - g.fillRect(0, 0, 400, 400);+ P0 X9 C% m5 t
- g.setColor(Color.RED);
9 M0 B: _ [/ n; T5 l ?0 W+ |, Y - g.setFont(font0);
2 i0 Z: `9 M; Q% J1 Y - let str = "晴纱是男娘"; Q1 b7 n" I9 p8 G3 p
- let ww = 400;$ d. q, p* v" Y
- let w = getW(str, font0);
0 g5 V3 i! N0 L/ V - g.drawString(str, ww / 2 - w / 2, 200);) f) S0 ~% \- E( y* p8 M. M
- }/ f6 e' A! }5 n: Q% ]* M2 Q7 l
- 3 T- m. y) K/ t( t# {$ K3 e. J9 w
- const mat = new Matrices();
Y; g. V% \% A7 a8 U& {: { - mat.translate(0, 0.5, 0);
& P7 G: |4 r E: k
6 V K( f k' K( E) ~( D) I; {( _. `- function create(ctx, state, entity) {
, y& j( ]( F8 K% G8 j7 a2 F - let info = {+ T* e3 w# Z2 n# d$ ?- e
- ctx: ctx,
% ^- a0 H6 _9 N- O4 ~ - isTrain: false,
! z N5 Y s; ^. X( i0 a - matrices: [mat],
( G3 M" u( e) _7 j - texture: [400, 400],
. I0 h1 I, y! d+ m3 R: E9 p - model: {% w q. l* h9 g) U- K% v
- renderType: "light",
5 |6 U, c/ F( x# ` - size: [1, 1],
9 p4 |) }5 C1 ~- v - uvSize: [1, 1]6 R+ o1 w1 b& U+ `, w; ~$ z' w9 E
- }# _6 G& [7 K* L5 @: y' r" x' g1 f
- }: P& ^0 ~, i2 m3 s
- let f = new Face(info);8 Z9 f' |) b2 g
- state.f = f;9 C9 g7 T& U" L( ^
- 7 C- l, k5 j% x- [# o* ^
- let t = f.texture;" c% |, u! w- W [
- let g = t.graphics;
5 d u( ^) w- q7 P( h+ u - state.running = true;6 ~+ Q4 k, l* c4 e0 G* s# B
- let fps = 24;
" O6 k. v) [1 h }1 Y6 x - da(g);//绘制底图
4 h1 n* G. v/ ^7 D; |1 ~% U - t.upload();
8 G2 \8 _! g0 k0 v. } - let k = 0;. d* I+ P0 i2 a
- let ti = Date.now();+ ~; [: A7 h0 R
- let rt = 0;' K9 [" A+ d; G: S1 j
- smooth = (k, v) => {// 平滑变化& y! p: ^3 S- n I$ z4 i
- if (v > k) return k;
5 H+ B) M. d: G) _( }7 R - if (k < 0) return 0;
8 ]9 T% @. D8 ~/ Z1 R- d4 R2 M5 J - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ P! ?* V) F1 I* N! _6 Q( n! L9 o$ b, m
- }) Q! u. g) }) f; O2 }6 a5 I
- run = () => {// 新线程
0 V' }( P( \! x& r7 J9 H9 K0 O+ d - let id = Thread.currentThread().getId();$ h- g |! j8 I3 G, W
- print("Thread start:" + id);4 {# ~( L/ u2 Q$ n3 u! i" ~2 y
- while (state.running) {
$ v+ D E3 T: d, E, w; y$ C - try {
2 b$ A- \$ w7 x8 U+ j( \ - k += (Date.now() - ti) / 1000 * 0.2;! h! d8 d' z& M* s
- ti = Date.now();. N. g8 |4 a Q @" |
- if (k > 1.5) {
) V" Z9 }$ j- C) Z5 v2 S% G - k = 0;' A0 A5 `; J( I! e2 o) s2 O
- }0 e: I; T: T" Y5 h0 R
- setComp(g, 1);1 j6 s- f" A. o
- da(g);
. T1 g& M1 J# h - let kk = smooth(1, k);//平滑切换透明度
: e( w9 _- X. S# @; Q2 u - setComp(g, kk);
[) G3 ^6 j0 `9 z: D0 O: W6 W1 G+ x2 y - db(g);
/ ~ ` M0 z2 ]5 w( s/ k; F - t.upload();0 _' A4 u. m; n+ d/ I0 }
- ctx.setDebugInfo("rt" ,Date.now() - ti);; R1 K" f4 l4 q. \
- ctx.setDebugInfo("k", k);! `3 e4 }& ^0 M* l n
- ctx.setDebugInfo("sm", kk);
2 o4 S, N( i, ] - rt = Date.now() - ti;
" a% J2 q6 V* C - Thread.sleep(ck(rt - 1000 / fps));, m0 t4 R% ~, ^# V8 G# z9 }5 M
- ctx.setDebugInfo("error", 0)8 }$ A7 t M! N4 a# L1 p9 d
- } catch (e) {
& S8 l5 i5 P* } I9 Y' i+ P' F - ctx.setDebugInfo("error", e); r* V j9 {$ y, ~) N. w
- }+ p' [/ H: w- @* ]% Q* B
- }
/ w% T. w& j5 T0 }0 A - print("Thread end:" + id);
7 S- d; E+ E7 [ - }
9 X6 d9 t7 L$ R - let th = new Thread(run, "qiehuan");2 ]' L/ N2 x% ?9 }- C
- th.start();
( p% q1 C7 Q0 t& a - }
4 R; g, t6 w0 |2 R7 x- |2 a
( Y( k1 F9 \- [ j- function render(ctx, state, entity) {8 o/ A8 I4 a$ w& S% v
- state.f.tick();" j7 y9 [: x6 c( u& H7 r8 ~
- }' I; X3 O. s' }
9 ?# d1 M+ G2 a" Z7 W2 D- function dispose(ctx, state, entity) {
; h3 n: l8 n; t5 T) t9 L! o* V; q - print("Dispose");
& ]% L: O0 C, k& ^5 b, P - state.running = false;# ~% c. ^* D( ]* g0 V7 B7 e4 t/ H
- state.f.close();! H# S2 r- g0 o0 W# H$ W4 d
- }0 _( A* s$ s2 U5 \: o f
- 1 Y+ N, a3 ^" V
- function setComp(g, value) {! v/ J% R; D0 t2 X! u. [) v4 j
- g.setComposite(AlphaComposite.SrcOver.derive(value));" h. e1 J/ _& Y* |! p2 H! Q
- }
复制代码 2 H, b" J8 R4 m0 o
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)
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