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x8 |* k* X1 G: u u' e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。9 Q3 F% ?4 ~3 @9 ^; z( r
- importPackage (java.lang);- O# C( g$ m9 g2 b6 r: Q
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));9 W8 O" w1 L1 g/ j/ W& ~
- , a6 G+ s2 z. Z! U
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
1 j% }9 X8 ~+ x1 E7 { - let frc = Resources.getFontRenderContext();4 |! Y% r9 L. S- c& G
- bounds = font.getStringBounds(str, frc);
* v. T; d# {, l# C - return Math.ceil(bounds.getWidth());8 X* Y1 A5 s: B: R6 U
- }
- ~& O% v9 |5 `* I - ( E7 s) l% D& T) b$ o
- da = (g) => {//底图绘制
3 f7 i3 U/ W" S& Q5 o' t0 P5 \ - g.setColor(Color.BLACK);4 N: g: }5 S0 P8 r
- g.fillRect(0, 0, 400, 400);7 z0 H8 M2 m5 R
- }% p3 y! N3 P* [: d+ `, b) {
) Z; S' e: L9 V) S- db = (g) => {//上层绘制2 R9 E* y4 P8 [6 l Y: g1 D, f4 r
- g.setColor(Color.WHITE);, U9 _# ^5 E3 ~$ R5 H. N0 Q
- g.fillRect(0, 0, 400, 400);$ R M/ g8 m$ `3 L, J1 W$ Y
- g.setColor(Color.RED);
4 O( z2 Z2 i+ r. p2 F6 S+ ]3 S - g.setFont(font0);) U7 M5 a/ T5 ~$ x2 r) u$ Y
- let str = "晴纱是男娘";2 N u1 n; h H O: }1 s
- let ww = 400;: A* I5 c0 }4 j+ p L1 L+ y
- let w = getW(str, font0);
9 G# f8 ^2 R; I7 z' ` - g.drawString(str, ww / 2 - w / 2, 200);
2 U8 k" F7 R5 I7 M" e! I3 P! \ - }
: _- A/ Z3 L1 U! G& F" ~: L$ i
! p. Z& f! J, S" l* Y- const mat = new Matrices();
2 }' S$ |$ p, o- Z* A/ \+ w, w - mat.translate(0, 0.5, 0);0 G8 V2 A# m e( b% q5 J
- 7 ?, ~+ W4 P0 _: W3 q3 a9 X6 r! }
- function create(ctx, state, entity) {! |4 K P: q2 \) v: ~
- let info = {$ {" [/ Z6 W/ @
- ctx: ctx,
; \4 ^$ K- H" s8 C( @/ G9 T! ~; P - isTrain: false,& I5 }% S# S1 Z) M. D
- matrices: [mat],
/ n9 V9 P- N, y - texture: [400, 400],
" G3 h. z: Z* O1 D6 `; _+ h7 i. \ - model: {
, k7 |* ]) T v$ m, o, z# T, z - renderType: "light",) B1 [0 t' B& O6 U
- size: [1, 1],
! @' n" O/ l7 b8 N - uvSize: [1, 1]
' ]% b' h$ l" o ? k, M& l } - }
! ] w" g _ g - }
9 R! e* H/ m2 S/ o. G# W - let f = new Face(info);
# A! _: p$ t) w0 U0 p( V4 k1 Z - state.f = f;
7 W# \- b( U7 _0 z' p7 P' _
) \3 S. E7 b- b! Z% D8 W, m+ i) ]9 O- let t = f.texture;9 r. @3 C. z5 r
- let g = t.graphics;( y* W! F/ b+ W
- state.running = true;
! k1 @" c6 w, M7 V0 N$ S+ v - let fps = 24;
- B- D4 p) h( D' E, f - da(g);//绘制底图( l5 g; \" H+ ~! A- J1 L3 X, q# L
- t.upload();
9 U& j* p0 Y. B' l) n* j1 L - let k = 0;
; G! @9 i/ D! w - let ti = Date.now();% d4 s5 {+ P! T
- let rt = 0;
! z, w& d* Q( a9 b9 F - smooth = (k, v) => {// 平滑变化; j, U/ C8 D; R7 T- w, m" K
- if (v > k) return k;* y/ [6 Y2 [+ g g% `- \4 D
- if (k < 0) return 0;
/ C" t- K: t& `3 R - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# s9 W, q$ v/ x" p) Q - }
7 f/ V/ B7 K4 ^8 V- u+ ]; |0 ?" C - run = () => {// 新线程
1 Z' Z1 } F1 Q9 _/ G - let id = Thread.currentThread().getId(); F3 R- m+ M- V& `) x4 K2 n
- print("Thread start:" + id);: I' Q( O7 S. T5 D" B: {3 m* d
- while (state.running) {/ H: U" N# s! j- \7 p
- try {6 J p6 s5 ?1 i+ X# D
- k += (Date.now() - ti) / 1000 * 0.2;
' k( r+ |$ u- Y3 T- t - ti = Date.now();% T2 u- d1 E+ U) p
- if (k > 1.5) {8 Y5 J6 `% \* I3 E7 J
- k = 0;; X3 Q _ u: m( ]0 i" a$ {) S9 L
- }# v7 ]3 g7 u0 [5 u% y: S% X& |
- setComp(g, 1);$ N/ u. M( j- W/ b* q6 l
- da(g);" W) r6 q8 Q' V- m+ B. W
- let kk = smooth(1, k);//平滑切换透明度
6 S) K1 n9 B9 a+ D - setComp(g, kk);5 A9 E2 {# d% p9 f6 i& `
- db(g);
, ^3 n8 g! M2 {9 v( u3 m2 B0 ^8 s - t.upload();2 h2 C; \; i) b) G; u: v( v! y
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 E% d; E/ [- P p4 Y% @
- ctx.setDebugInfo("k", k);& P. y- a8 s- \( v+ v6 i
- ctx.setDebugInfo("sm", kk);
( E) u' r2 R* @0 B! S" M6 T$ | - rt = Date.now() - ti;3 O5 W2 T( m1 P% ?" {
- Thread.sleep(ck(rt - 1000 / fps));
4 g9 b' e( g* x2 c4 v - ctx.setDebugInfo("error", 0)5 Q1 }; P, `1 g4 @
- } catch (e) {. D3 O, |" |0 E
- ctx.setDebugInfo("error", e);& Q& R {6 d; I8 k
- }. R+ P- G: `2 t
- }# m' i& N9 q$ w7 }. N [
- print("Thread end:" + id);
8 V& Q. G3 _. b6 @, }% x - }, {, Q1 ?4 l0 T4 z/ D4 \0 S4 }
- let th = new Thread(run, "qiehuan");2 b: W. T) A6 d: E. ]' R
- th.start();
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- 0 M# A, A! T8 ^7 _
- function render(ctx, state, entity) {7 T3 R4 ?4 {% Z# M0 ], e
- state.f.tick();! U4 z% @. E8 U/ q; G3 z
- }& @. m# y: w r1 o6 E6 r
- P; n& j! z Z/ e1 q- function dispose(ctx, state, entity) {
& L- |# n/ I0 n- s! S - print("Dispose");
: S- u7 I1 s/ {2 ?9 f2 L - state.running = false;7 `, Y8 p8 Z1 X( E( O
- state.f.close();
6 A6 ^& A& |0 z* r3 b - }
7 Z7 U$ o* }; n+ }! h$ e3 M! q' p - , a* _8 v- Q( h9 P5 b& A4 l4 @6 A
- function setComp(g, value) {0 N- s) Y) R% J. V
- g.setComposite(AlphaComposite.SrcOver.derive(value));/ n( O: ^0 I, R) O
- }
复制代码
( C, m2 P6 l' L8 T# q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。' o* W7 S# B, `+ u5 n" e; S0 x& r
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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)( Y& x& I4 F; D$ Q, a$ C9 a4 ?
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