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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。& x; }" n2 h1 B% t
- importPackage (java.lang);
7 N& G3 _* `. s) Y3 c - importPackage (java.awt);& C/ n9 M4 B" X0 Y9 h) w( S
. ]- n# J+ ?0 |0 v- include(Resources.id("mtrsteamloco:library/code/face.js"));; A; @: \8 B. V: y( j: T& t7 R! N
- & I7 n4 C( E" I! ?( l0 d
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" {: y- V2 J- P7 n, p3 [
- 4 v% q- I8 ?$ X& q5 t
- function getW(str, font) {
# K, J& x( V# A- e9 C( M0 w( r' g! {4 P - let frc = Resources.getFontRenderContext();
6 T3 I) G) ~9 F/ Z3 d - bounds = font.getStringBounds(str, frc);
2 X+ \1 @( @( V9 }* K }1 ~. @8 ] - return Math.ceil(bounds.getWidth());; X! v q4 q- ~: m, q3 ?
- }
/ m3 Q: a; O2 J& D5 q+ S) D0 ? - 3 y/ l; C2 L# w5 l* a* Y8 [* I
- da = (g) => {//底图绘制0 O2 C8 w/ U0 i
- g.setColor(Color.BLACK);9 }$ T' r T" H. [* P0 h2 q
- g.fillRect(0, 0, 400, 400);
1 o, S# D! Z2 A# S% S$ e; V8 Y3 G; f - } k3 E2 R% [+ d5 s' {) j
- " |) J- [' j: ]8 K( v
- db = (g) => {//上层绘制3 H' O+ x$ _# q& Z
- g.setColor(Color.WHITE); ~8 w: A( S) a
- g.fillRect(0, 0, 400, 400);
2 x- b1 b: g0 `6 j E% O6 J - g.setColor(Color.RED);1 r+ \3 h( q* `( y' Z" @) d* [7 J
- g.setFont(font0);
) W+ C' ^% o- M0 g# ` - let str = "晴纱是男娘";
' G1 \6 w: y9 J/ B - let ww = 400;0 Z7 q2 y0 @0 m7 } `, c+ K
- let w = getW(str, font0);
! e4 x2 w6 |. P5 U; c" i/ A - g.drawString(str, ww / 2 - w / 2, 200);
2 d' s! C! e8 m ?6 ^) x - }/ e D- I* P1 e) ]
- & E l' {0 l' E* J
- const mat = new Matrices();
$ D b, J5 i0 D% o( e" o) \& ? - mat.translate(0, 0.5, 0);5 \2 @- P1 j$ S( M5 C6 E5 f' m
/ X- r# A; w0 @: e- function create(ctx, state, entity) {
V. B" D N, h' W' C - let info = {
( s$ H3 E2 C+ T$ m4 ` t - ctx: ctx,
' Z3 A8 ?- z# D1 @) d - isTrain: false,
, E. f( N' s& Y8 Z0 E, y - matrices: [mat],5 ], h* z9 D6 p2 _' [
- texture: [400, 400],
* ~: v! C6 o6 T - model: {
5 B$ A6 ^2 Q0 V& {1 Q3 O2 W$ m - renderType: "light",
# n( N; ]6 h8 ?3 e - size: [1, 1],+ ], f$ @ z" m7 d
- uvSize: [1, 1], v! b1 U5 y' \* l, _
- }
$ v# d q$ q; K% K# q5 t( U8 J - }
. g8 X8 Q) D$ }+ k1 m) I' q - let f = new Face(info);2 H6 c6 l. d- \5 a
- state.f = f;
0 G( l/ e4 v# w: }. a
b7 R+ d% v, ]' Z$ D- let t = f.texture;0 |$ W) W. o+ {6 [6 ~/ v7 D
- let g = t.graphics;
* l7 w. \5 m& @2 ~ - state.running = true;$ D1 I# K5 b; h2 ]3 K
- let fps = 24;& a* H. y C3 z" @1 ?: t. e5 d
- da(g);//绘制底图- ]. U# K# P" Q6 K: |" I' h
- t.upload();
& O0 [4 j5 }5 M. c8 n# ^ - let k = 0;( ~0 H/ i1 [# y4 i5 c: P
- let ti = Date.now();
" O2 a8 G3 @- m9 V - let rt = 0;' Z* `; u5 Y9 V- U- g( P
- smooth = (k, v) => {// 平滑变化+ S5 F( q& l# u: {' Y. E8 U- Q' p" o
- if (v > k) return k;! g6 v: Y0 R- q: T. i$ g7 ]
- if (k < 0) return 0;
! v1 R% W+ w% W8 n - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;/ P) o) d. K) o. _6 ?" I+ ^
- }' d+ ^# _) S) L8 s3 n
- run = () => {// 新线程, Z# V% e I. b* d
- let id = Thread.currentThread().getId();
; `, N6 C2 j5 ]- G( y8 p/ A) s - print("Thread start:" + id);8 G/ B1 a0 i0 m5 d
- while (state.running) {3 R8 H F: b7 I8 _
- try {; A4 s3 H' ]- l( }
- k += (Date.now() - ti) / 1000 * 0.2;' ~9 ^% _4 {' W; e/ ` Q2 b3 Z
- ti = Date.now();
+ m4 x* `. G3 K- W - if (k > 1.5) {; |+ a2 W' B2 @$ g2 Z& w f, Q
- k = 0;0 K. `/ y$ ]3 j8 V% a( G: ^
- }0 d1 v f, [2 z" Q
- setComp(g, 1);
" ^3 e9 T1 C+ m! Q* @; j - da(g);+ {0 O7 U# e2 t
- let kk = smooth(1, k);//平滑切换透明度
: l4 |/ m; a1 I/ Y8 o4 W - setComp(g, kk);
9 ]7 p. T) g& g" N8 r! q; W0 m - db(g);
d% F9 j/ D9 x* Q7 I- H - t.upload();
/ j7 t7 u+ r% P9 {; [) ` - ctx.setDebugInfo("rt" ,Date.now() - ti);
8 @! p" h! M0 m; i - ctx.setDebugInfo("k", k);
; ~# L' O; l4 d9 V$ d- j0 X - ctx.setDebugInfo("sm", kk);
9 U |9 J5 K3 u' Q) X5 r - rt = Date.now() - ti;- V1 n1 K7 n( a7 t! h
- Thread.sleep(ck(rt - 1000 / fps));
! x4 r. G6 L N/ F& C$ O - ctx.setDebugInfo("error", 0)
6 A5 n, u6 {+ w! M& ]. a - } catch (e) {
! k/ i/ W0 l Q, l5 g Y - ctx.setDebugInfo("error", e);
* N+ R" Q+ b6 g+ H* S+ X - }) Y5 y2 Q3 i' ^4 N4 v% u# u( B
- }9 K& H! o- S' W& s- M
- print("Thread end:" + id);
& k$ O9 D/ \9 D7 S% W" B - }
( i7 p2 a$ c; ~) h+ J+ { - let th = new Thread(run, "qiehuan");! Q) T3 {: H+ B' T/ e& _: u- q9 w/ y
- th.start();
. u7 I: l. H0 U6 e* k - }
5 B! d9 |1 r2 y0 d* g( i+ q. H' G, v - : E9 m$ b: |9 T% E% D
- function render(ctx, state, entity) {: R! l. e7 s! d
- state.f.tick();( y( K8 ]- a' q4 y# c
- }
9 W/ y ~) o5 v
) L! p8 S0 c% Z$ `6 [6 k- J- function dispose(ctx, state, entity) {# s$ ~( t% L* L( @: Q5 p
- print("Dispose");
/ j( M9 B1 U ~7 m( D5 K+ W - state.running = false;
# C0 R( @( t; A' D - state.f.close();
C7 E" e6 } f - }
+ w. r0 ?/ N2 O7 Q! a - 8 u, B# A) D8 @5 i; `
- function setComp(g, value) {
9 y1 d$ J0 G4 F1 z5 Z2 u - g.setComposite(AlphaComposite.SrcOver.derive(value));
; [; j7 e) R2 i3 V2 H - }
复制代码
8 {2 |4 \, K1 P3 ~6 \- [/ c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); n# O3 k& x* ?7 F
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