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3 G. x( ~' F0 Q4 V" D* ^) M! D( |( B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。* H1 _9 O4 Z' K5 \
- importPackage (java.lang);2 N/ [# Q7 G8 P2 n1 J: w
- importPackage (java.awt);2 F8 \" M7 @0 Y) G& A# Q9 Z+ T
7 X+ s+ F+ P: ~& Z- include(Resources.id("mtrsteamloco:library/code/face.js"));! W: D3 e* w' o( {' V! N& R8 G
- 4 I, h1 M6 \6 X# ?# |+ c: A @
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. [9 t5 x8 A" V4 N& o6 j- function getW(str, font) {1 H) t- U( G z2 e& z9 r) v
- let frc = Resources.getFontRenderContext();: T* w# A5 v/ e
- bounds = font.getStringBounds(str, frc);
4 X4 i' v5 }. K% K0 ^) s, b - return Math.ceil(bounds.getWidth());
7 I0 K' d% U2 K3 r - }
- c6 G- @- {2 }# Z! _! i% o - 5 S# h* ~- R: V ]3 n
- da = (g) => {//底图绘制1 c+ }( I4 ]0 n$ [3 i* D
- g.setColor(Color.BLACK);& t' v' V8 j8 }% n% \
- g.fillRect(0, 0, 400, 400);
+ x4 I+ U, W1 T$ x7 {5 j8 P - }
0 C6 K( m% ?( p% u9 r( i. f3 B6 ~4 T! ^
$ s9 ?5 i% D, a0 J) X: _& z- db = (g) => {//上层绘制
: B' @4 _/ ?- S$ Z& N \ - g.setColor(Color.WHITE);
2 y0 O& ~" ]) R/ @, d3 ? - g.fillRect(0, 0, 400, 400);
3 O4 G2 O5 C, ~' q4 v, w, A* F. Z - g.setColor(Color.RED);
. ]6 B2 Y4 n J4 ? - g.setFont(font0);, ? o! ]" h: f# n, V+ W: P2 s( x
- let str = "晴纱是男娘";: ]/ V. r" v! q$ _
- let ww = 400;
) e/ H% F9 l5 k* P2 Q& z, n - let w = getW(str, font0);) ^ Q3 P4 [) f7 k7 I
- g.drawString(str, ww / 2 - w / 2, 200);
n2 b1 A, ^7 ]( v) q( j3 b - }4 E# i1 u8 A# G% u
- + ]2 m$ w4 N6 d6 c8 \2 p+ p
- const mat = new Matrices();4 S4 n) t+ w) I4 [3 o s
- mat.translate(0, 0.5, 0);0 h3 j) |7 y+ @8 @$ O
7 N. b, w- J0 Z: u- function create(ctx, state, entity) {
5 Z, o! W% n+ t+ g - let info = {
" ?& q4 _: A4 L4 K# }1 ?$ \ - ctx: ctx,
5 _# ~6 m7 g9 J4 q/ B- h7 G* G - isTrain: false,
) q/ |3 @3 t) }( _( e6 j - matrices: [mat],
5 @- P) ~& {/ I6 }4 o, e8 u+ ` - texture: [400, 400],
. J* x, d+ s9 x k- {$ e6 h- r - model: {
3 e5 U* P, @7 s( m0 b1 ]" W - renderType: "light",; f; ]) {" ]; w& d' h; A
- size: [1, 1],
Q2 Z/ g( u6 d3 v1 f - uvSize: [1, 1]
: u$ ^+ o6 n; j+ J: M- s - }
& t( ~/ v# i( Y5 N8 m; ? k - }: n2 i" c: v+ Y! C
- let f = new Face(info);3 H2 h* z: n( \
- state.f = f;
! o, y( k" H7 m) v& ? - / D' q# u; U; C" s5 ]
- let t = f.texture;
% L- _1 o5 \! n7 x u( r - let g = t.graphics;1 }+ O9 y! J& c+ }5 O: m6 x! J
- state.running = true;
3 N4 \) o1 c C e3 \ - let fps = 24;
M& u, }9 E$ h8 ]) ? - da(g);//绘制底图5 r; b. `9 c- |% Y7 y
- t.upload();. b( `- |5 L3 X) w3 k
- let k = 0;
$ D9 \# |% _- _) z9 _" @8 { - let ti = Date.now();/ X& p p! N2 m4 e% E: h; `! V; V
- let rt = 0; |. U, d- U( B0 n! d3 J U# G: n+ s
- smooth = (k, v) => {// 平滑变化
8 J+ j4 B! \2 T4 y - if (v > k) return k;
! r+ i" \6 [+ i6 ^% v+ A% @ - if (k < 0) return 0;
' R! @; }, V' x: m& x( ] - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 C4 K* ^/ E: f0 o - }( z3 i+ ^ e% ~/ d& L1 O' v3 n- s
- run = () => {// 新线程3 f6 }# g4 x1 E' b v
- let id = Thread.currentThread().getId();
5 q/ q1 ]. G% i3 b5 U* \. h1 a3 G - print("Thread start:" + id);
! U% Y5 l) U( Q6 _ b, \0 W' O) z - while (state.running) {
" P! P2 m* i4 [' t5 f - try {1 @3 j! r) d6 [6 P" g" q
- k += (Date.now() - ti) / 1000 * 0.2;1 n9 h" f# l* `( j0 G; l2 q
- ti = Date.now();3 l0 [9 l l; e+ _8 Q) k3 h! E# u
- if (k > 1.5) {
. M7 v1 @. e: u6 l - k = 0;
& }, K1 t4 |, ~1 U/ z - }( |/ A7 M; \, p. Z o
- setComp(g, 1);' c) n2 W* w: }' V$ R) J1 r
- da(g);) D. @* v G" y% h
- let kk = smooth(1, k);//平滑切换透明度. G+ w U9 I9 V7 \% y6 k; ^
- setComp(g, kk);
3 R; k2 G3 \ {' I: c - db(g);3 Z, v* J; q. S4 E2 T. q
- t.upload();: d' K9 _; v9 O& t2 S: _% r
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ X0 d4 b* y+ s6 v! p) M - ctx.setDebugInfo("k", k);
" s1 [7 Q$ B& M, d/ ] - ctx.setDebugInfo("sm", kk);+ J2 e* e; O+ j
- rt = Date.now() - ti;
6 ?' r7 T: ]5 n) e - Thread.sleep(ck(rt - 1000 / fps));
0 u6 y: l: R0 z) \9 b: S. ^! f - ctx.setDebugInfo("error", 0)
; O9 |, O2 X7 ]" S6 K1 ]5 P - } catch (e) {' {/ K$ I7 K g" t- u) }3 ?
- ctx.setDebugInfo("error", e);' }2 O9 j7 u3 Q; g- x* Z8 F6 X ^
- }0 C% V& i. D" j& Q* I6 P- e2 O
- }
6 j4 {8 A; O7 _/ L7 S8 g - print("Thread end:" + id);" x* v4 N m4 t6 l; a, q$ E
- }
$ k4 l! x* c* }6 k' f" Z - let th = new Thread(run, "qiehuan");
. n" {/ b( ]* c5 u. q& Y3 | - th.start();
) u6 }0 C. \+ N0 w - }
& x9 E4 c5 v! z# r& E9 y4 A' x - * S) T& z, q2 \
- function render(ctx, state, entity) {+ y2 N8 L A" y
- state.f.tick();3 y4 p3 D" O, k) `) t
- }. \. I2 Q8 _1 `1 @& e$ d: I
- / v0 x0 X# `% m, G; w
- function dispose(ctx, state, entity) {
9 g' l- h! g9 K0 b; Y3 H - print("Dispose");
: u ^% N' `- a1 U9 P0 Q - state.running = false;
% J; F4 ], [% Q" }1 {- ]% g8 N8 G - state.f.close();2 S2 g `% s+ M, U4 s2 f3 a+ O
- }( W; j) W9 T+ ^8 m+ e+ z8 F3 S
- * Z. z% g1 v- ^# y3 Z
- function setComp(g, value) {2 e8 E2 V: P" H- _; n6 D7 C' w! W$ S
- g.setComposite(AlphaComposite.SrcOver.derive(value));
5 ?7 U6 z/ Y* r! D - }
复制代码
! `! u* {+ z( p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。* G3 p/ K& p' ~. b, m, s+ Y
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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)" ~; J6 y7 ?+ \# h, W7 K; _* J$ s
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