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& P4 x* c* h! G) W, P% j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/ e4 d9 \$ j) x% [; ]- importPackage (java.lang);
& O2 `! t+ C$ g$ {( i5 a - importPackage (java.awt);
5 `% h g3 r% L' d) X8 r# X7 j' W
5 k: t# [: e' @2 O& Y8 N7 S4 b- include(Resources.id("mtrsteamloco:library/code/face.js"));( Y L& s9 l3 X/ n* I' G5 V5 P
; y* p0 j) J4 l+ f% F: t1 ?) o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);) r0 G" W, |1 Z7 l
- : T; J& N/ t7 h* `( { G
- function getW(str, font) {: R, Q; V, z3 m
- let frc = Resources.getFontRenderContext();" N1 W' l* {% A' Z* y0 E8 e
- bounds = font.getStringBounds(str, frc);
$ a4 s/ U, \* ~( A3 }6 b9 r - return Math.ceil(bounds.getWidth());
+ L; k, U% X" x5 i+ m# T, D$ O - }
0 J! W: Q- l- u+ x/ w& q - $ D9 `1 Y! B3 t/ ^+ C
- da = (g) => {//底图绘制' j2 [1 ]0 c2 y" X6 l
- g.setColor(Color.BLACK);4 \( G! c! q6 x! L5 W# m; F
- g.fillRect(0, 0, 400, 400);
: u" B q0 B0 F' y - }% s, z- O8 ~8 M H* n6 J" n
- ; T* \; D, N5 |& g# c
- db = (g) => {//上层绘制/ V7 m) c& H: V$ N5 `9 k
- g.setColor(Color.WHITE);
% U0 B* `: K/ e' h* f7 f* q - g.fillRect(0, 0, 400, 400);, m! X' T7 I7 a' V1 S
- g.setColor(Color.RED);. i2 {9 V( z0 Q9 p
- g.setFont(font0); N2 @0 j% B4 m6 Q, ~
- let str = "晴纱是男娘";
4 H: r/ }7 s1 t2 f3 B; T - let ww = 400;
. ^+ r5 f& {% O( U* { - let w = getW(str, font0);+ J1 T7 V0 l Q h4 l
- g.drawString(str, ww / 2 - w / 2, 200);, ?0 \5 `* D+ D+ t, r6 Y
- }
7 p( \2 T% \3 r2 f1 {. ~% r
9 W- c+ D7 V" p$ G- const mat = new Matrices();
! m, d, o2 Z) L - mat.translate(0, 0.5, 0);& [% J' E6 k- L( ]; Q* K
- 7 F1 z( P1 v1 o8 M0 o
- function create(ctx, state, entity) {9 n( E: _4 |1 e2 m, R3 F
- let info = {
) L) S& f+ z0 m/ W. f+ |2 W - ctx: ctx,
: N5 }+ I1 ?" ], C' E - isTrain: false,' C0 o) W. r: h9 [% T( g! T
- matrices: [mat],
! |) s! G; A: A) U - texture: [400, 400],
/ o& x. r; Z. w2 N( V! O4 F. p - model: {' |7 A4 o7 p0 }6 U' w! S' m# y
- renderType: "light",
# d+ ?4 M g3 X- B - size: [1, 1],
. g: x. K& _, g5 g! ^$ _1 N4 X - uvSize: [1, 1]
z! l0 r8 O" \# u3 Y - }
8 `1 q3 I5 g8 ]0 K, W: g) u - }
, r) q- w% U& T! X D: J - let f = new Face(info);: ]! G( R+ p$ c; ?/ t3 }# X: K
- state.f = f;' U: B3 P3 F/ B: o8 I
* ?- j5 D8 O1 |+ ~- let t = f.texture;% C% a* @$ a& Y$ [: m7 H, j
- let g = t.graphics;
; g3 Q) \" G, d* h - state.running = true;; v% Z; ~5 @$ P4 w' ]
- let fps = 24;# c P5 z6 O/ S5 O: u: x2 f* d
- da(g);//绘制底图! R2 s" \+ U/ U$ j- P7 E) R9 z" h" a
- t.upload();1 c8 v- X& |; j' R$ h
- let k = 0;
; Z; y/ J' I0 R+ ]* P/ X - let ti = Date.now();
9 x0 a0 d3 T0 g+ Z, c% i/ l - let rt = 0;
" O& K D y. I9 { H - smooth = (k, v) => {// 平滑变化
3 ^+ f w- |% c0 V - if (v > k) return k;
' n( |8 d$ e3 m! b0 J' J4 C, g - if (k < 0) return 0;
2 w/ S4 d+ E. ^& g - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# K- E% J1 d7 y9 ^! m5 a - }6 G1 ` v4 ~2 R8 u# K7 i
- run = () => {// 新线程
) y) k* T* V8 s& m' T* V. K - let id = Thread.currentThread().getId();
+ T7 v# z8 Q# x3 c: g( h( @- H& O - print("Thread start:" + id);( p( W4 u/ t0 Y* ]) q/ [4 g
- while (state.running) {3 X4 o. F3 H3 j: D X3 p' j
- try {# }1 G4 X6 q2 v. f7 T: `
- k += (Date.now() - ti) / 1000 * 0.2;
$ q2 X; n& }8 G* y+ s3 B - ti = Date.now();
0 M) B7 j- r2 i0 T0 [, B! S - if (k > 1.5) {
* ], `) p- }# n3 ` J7 o( f - k = 0;
) r! h$ u: X2 E& K6 U - }
- `+ a6 S C0 c5 v) v7 c - setComp(g, 1);9 J3 E5 n9 V/ |7 O
- da(g);3 B; w- H% _. f
- let kk = smooth(1, k);//平滑切换透明度
" ^. P: k& A2 F9 ? - setComp(g, kk);: |+ L( k" A0 w) E7 T m# o/ ?
- db(g);0 e% `( x& `& ]5 d
- t.upload();
& a4 K+ R' q+ d3 @ - ctx.setDebugInfo("rt" ,Date.now() - ti);
1 H" Y, W) b4 A9 h - ctx.setDebugInfo("k", k);
5 }+ u5 q* v8 C* P0 }8 _) z - ctx.setDebugInfo("sm", kk);) m. ]6 |9 Z* d+ v7 K# ^
- rt = Date.now() - ti;! J- r C. s4 h1 f j* T
- Thread.sleep(ck(rt - 1000 / fps));
3 H3 T: u: m" ]; m - ctx.setDebugInfo("error", 0)
$ I' ]5 D# p7 n6 T! R - } catch (e) {
+ P( n l& c( I1 g4 G - ctx.setDebugInfo("error", e);/ E- h0 D' Q! A
- }
8 L+ _ C& W) ]; m6 z- g1 H - }
. g& T1 O! e, o# u/ S - print("Thread end:" + id);
* `" j# v7 o8 K* u1 g I - }
! K! E3 o0 [8 [3 u - let th = new Thread(run, "qiehuan");
; ?; k8 n- a) a - th.start();% V( {7 e! y. O9 e Z3 f0 |
- }
9 H; R" f2 {% y! G% F( W9 [9 k) x9 @ - * D+ M3 ^% Y' d$ i
- function render(ctx, state, entity) {
$ |1 v' ?3 F9 X% t - state.f.tick();) V. `6 U( z& s' U2 `6 f
- }$ L' b" C W9 _& v/ y* l
, t5 p9 B( @& i" v+ G4 j4 Y6 |- function dispose(ctx, state, entity) {& b* c5 S: g% b3 r4 f0 Z! m
- print("Dispose");
' s q! D' H e - state.running = false;3 {; v: I3 g4 \7 i0 o1 V8 U
- state.f.close();
: m% @. M( e$ P; Q1 T - }
8 Z& [" B3 K5 t
! a4 h+ i7 E& X- Z' z; m- function setComp(g, value) {
' C7 U! O7 v0 D+ W$ ]2 A - g.setComposite(AlphaComposite.SrcOver.derive(value));# |9 _: Y0 ~+ z3 H8 s" t8 {
- }
复制代码
3 e: ~4 } b. \0 Z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。! g% i) Y2 \9 K
1 [" ?: a, H6 j9 f Q
9 p2 ^* w% D* r1 T( T! F# c顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)- J2 o4 l/ B0 P4 h, D+ b4 X
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