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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。
- `: L; I8 c* @& n0 N) }5 j0 n+ H- importPackage (java.lang);, u8 G7 u! G3 \; p) F
- importPackage (java.awt);' {4 L) X1 i) G4 |5 B$ }- N/ _3 Y
" a1 @. k. K2 a1 r- include(Resources.id("mtrsteamloco:library/code/face.js"));( A- m! d: e5 _" K+ C
- ' b7 P0 Z8 u9 H
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# Z% X# t- a# I$ D9 E$ O
- * L8 ] _- h5 m6 O3 O8 n6 b V
- function getW(str, font) {( a1 s) a# E4 t+ t8 Z6 i1 r
- let frc = Resources.getFontRenderContext();# F* [, p6 v$ _' K
- bounds = font.getStringBounds(str, frc);
) T7 ]$ J4 n5 V* s# y4 x+ n! U \& z - return Math.ceil(bounds.getWidth());
+ V/ A0 X8 @' @/ {' ]( O - }
/ {+ P" @( k6 G" ~/ e$ ?8 A. ? - 0 j+ f1 w. a( h& {8 Y5 k
- da = (g) => {//底图绘制
5 b1 M* g9 y% S. {/ A - g.setColor(Color.BLACK);
, g' r- B6 q2 e - g.fillRect(0, 0, 400, 400);& ?& W3 S9 h0 y) S6 n: e9 j$ o K
- }( a5 B+ \+ }( u- J% d7 z
- 1 N5 f9 p9 Q5 Q; V2 z2 r) d
- db = (g) => {//上层绘制1 s6 b2 {/ n9 @ u
- g.setColor(Color.WHITE);/ a. b3 L; r* s+ v3 G
- g.fillRect(0, 0, 400, 400);+ S J' P: j% x0 o0 @$ o
- g.setColor(Color.RED);- y$ \& _- g+ o( n: `
- g.setFont(font0);
8 \+ z, \- r1 q, ]& k# L - let str = "晴纱是男娘";
7 W- r3 z \, p4 V, {, {! N9 V) T: ^ - let ww = 400;
9 y) {% s& f F1 |! L1 j0 m8 C! u& r - let w = getW(str, font0);- J2 d V2 I) O4 p% b. t0 \& K
- g.drawString(str, ww / 2 - w / 2, 200);
/ B6 t& s, W. \# {& |" A- L" x - }5 C; S7 a- B1 f- g
$ A9 s3 ^; j) K/ M1 A6 t! b" b0 H) S- const mat = new Matrices();! z+ }/ R: y; e0 n- b
- mat.translate(0, 0.5, 0);; J# g) f, [& ]& t! K
' x* L( B, [ O9 z2 l" w- function create(ctx, state, entity) {
8 u; D9 l0 n/ m, m - let info = {1 K- R$ w% Q. |
- ctx: ctx,. s4 d9 G! P3 M" W5 t
- isTrain: false,- V% z, [8 k( g
- matrices: [mat],. @& h7 f2 U+ B, O0 W2 h8 K) X
- texture: [400, 400],
. y2 n a8 j5 w3 L - model: {
! E. t i/ o7 q8 h, ]4 x - renderType: "light",
/ Y B" I6 u$ _3 A0 s8 G' \4 p' b- ` - size: [1, 1],5 H7 g9 e4 k. {
- uvSize: [1, 1]
9 h8 z% d& u$ B$ B5 Z' R& f - }
G6 j2 `" o8 a1 l+ t* `2 d - }
% p0 {- d; Q( e: w4 g2 N0 q - let f = new Face(info);
% E; |8 a* G2 U; L, r" @; l0 w - state.f = f;
, L5 e3 A- H) R2 j% S - # P. @& X4 i5 Q: p* e X
- let t = f.texture;
+ {8 u% j9 R+ L9 J& Y! ?$ h# h3 N; D - let g = t.graphics;6 v' g d. T& J/ K# J
- state.running = true;
3 ~* v# I% q$ n6 x2 B( [( A6 L9 G - let fps = 24;8 T0 F5 h7 ]/ ^5 c
- da(g);//绘制底图6 d! Y( |* H u- e8 T* V
- t.upload();
/ R+ P, e2 E( _ - let k = 0;0 K# r6 x1 Y7 V$ h
- let ti = Date.now();
- V" f* E: v( c6 M0 L! r, p, W - let rt = 0;2 X L% Q% g% i" ^0 j* J: L
- smooth = (k, v) => {// 平滑变化
$ ^3 p7 t6 R+ b" a2 f - if (v > k) return k; a) G9 H8 i$ R9 v& a1 Z+ ~/ b
- if (k < 0) return 0;
7 l5 d0 s& d; g- ~( P% J6 {9 Z - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 v$ c0 `4 F. D7 p& r5 V( y
- }% \8 `* G5 l! i2 m" d
- run = () => {// 新线程# t1 c& v; m% G; ~3 \, A
- let id = Thread.currentThread().getId();
/ c# u7 `3 u5 z - print("Thread start:" + id);+ J$ a: x) W2 {# R
- while (state.running) {
; F. u, u7 B1 N& D - try {
0 B7 P' L3 [. y7 c1 j, o$ ]. b; m - k += (Date.now() - ti) / 1000 * 0.2;, `0 K7 d$ V9 \7 _
- ti = Date.now();
5 ~. u6 r( j- o) A2 h - if (k > 1.5) {
q c ~( i- `' S3 N - k = 0;
4 x9 M; Q% h: |1 `5 `6 L6 \" ]) O& w& h - }
2 H$ ]1 {- z: [3 A6 p - setComp(g, 1);
" N! ^8 y. P* C" n5 V' o7 Y) } - da(g);) y& j8 D X# V) X# b
- let kk = smooth(1, k);//平滑切换透明度 G; i# V" _2 B
- setComp(g, kk);* C3 @) ^: b) ~' y- ?" w1 Y
- db(g);6 Y" `0 w9 M9 V* f
- t.upload();5 e3 e( n5 A, w3 i) _% t) c
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( J: N! r' n+ H l - ctx.setDebugInfo("k", k);
% B6 l9 S0 a5 T1 Y L1 c - ctx.setDebugInfo("sm", kk);
9 W. `; J% _. Y' a - rt = Date.now() - ti;* p$ U ~: p3 A* J8 Q
- Thread.sleep(ck(rt - 1000 / fps));1 H/ k+ N: S8 [# B9 A# F3 [) y
- ctx.setDebugInfo("error", 0)3 K1 S# y# d; ` h+ y& c" w2 X: m
- } catch (e) {2 k/ p- D& n, P
- ctx.setDebugInfo("error", e);& H; [8 U0 n- S( X
- }! i) {$ _- E% o
- }
1 J0 B. [, ?' O j - print("Thread end:" + id);
. }" {8 q" L) V - }
4 \' |0 j9 h# z! K* q/ `1 _. E" ] - let th = new Thread(run, "qiehuan");9 C& x |; B# z- ?
- th.start();) f5 e2 u( @/ p' f; D, l
- }
) [+ Z) } _! g5 I - ! i- G3 @& I; d2 {# G
- function render(ctx, state, entity) {+ r0 i" ~' i, x7 Z
- state.f.tick();: N0 a% ?: T( [( i: S% p% i
- }
2 }# j2 p6 ]# K$ V
3 H8 l; x' F! a+ s' O5 L- function dispose(ctx, state, entity) {
3 z5 Y3 x; A" O* ?9 }* l - print("Dispose");
/ Z9 G- Y+ ^8 L: @. n - state.running = false;# F6 Z: `4 k/ D' v5 n! F
- state.f.close();
- y M$ _. t6 X+ m$ s6 v: u& { - }
2 N! x. S6 X2 A+ n+ z - + \- A# R/ n4 H+ |: G) L8 k1 L( k
- function setComp(g, value) {
) Q" V3 Y X6 x0 k4 B' a: @ - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 E0 T) c/ t0 C, v+ e - }
复制代码
9 [ F; O( S- ~5 f- n$ [7 Y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, p( U& ~, m+ z; a! m1 v2 q0 b& _7 v
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' t" S0 Z- C+ y( o( k5 `2 E; @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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