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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。
& D/ j; R' B1 x* G3 m* r- importPackage (java.lang);
( r" w5 d7 r7 k, m' H! p - importPackage (java.awt);' F; |- x, R3 b" Y9 C* Q1 O( F5 i6 o
- 5 Z, e3 s/ Q/ x" Z, U
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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& F1 o7 |$ s- S2 C+ y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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1 C& Z; r, t3 X* o4 M3 @4 a- function getW(str, font) {1 e3 t* {! e3 }* l7 B+ ]
- let frc = Resources.getFontRenderContext();4 G) ^( @2 h. o) j4 Y
- bounds = font.getStringBounds(str, frc);
7 A) J' K6 p& A - return Math.ceil(bounds.getWidth());
- `: F4 T5 _- J+ i* h5 ~5 ~ - }
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- da = (g) => {//底图绘制& h6 q( n, @+ a8 k
- g.setColor(Color.BLACK);
7 s) n1 s" M' y - g.fillRect(0, 0, 400, 400);% p+ g* \" }4 v" L; P
- }
+ c) a! u" u; q* s
- `$ c/ B! f, d6 T# ]- db = (g) => {//上层绘制
1 r& \, r% U4 Q# p Q* [+ ?9 ` - g.setColor(Color.WHITE);* Y( A' l6 A& l# K- Z
- g.fillRect(0, 0, 400, 400);
4 U4 b# b2 W( l5 W) Q) n& [' w - g.setColor(Color.RED);
) e) N0 Q7 @# t$ A' u) E - g.setFont(font0);% n7 M. [+ q( h. O+ p
- let str = "晴纱是男娘";
+ O9 `8 W0 k/ h, l9 M - let ww = 400;) t4 t( h# o& R7 g6 v5 R. w t
- let w = getW(str, font0);
1 C: v& s9 D1 k& Z% x - g.drawString(str, ww / 2 - w / 2, 200);' D8 E' D- n' }: \) _! m3 g3 y7 ^
- }
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* q6 {" J9 d) P! R( O- const mat = new Matrices();" K* \& G1 |& \
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
4 G" n. `- _9 J" {, Y M - let info = {
8 F7 I' b9 e$ J" C+ B - ctx: ctx,( W5 V( z; k+ H, L
- isTrain: false,
1 e+ \4 E+ @$ |$ n, K$ e - matrices: [mat],
8 Z! ?4 `2 M5 X# j* S; T - texture: [400, 400],
' r* J& ]8 o ?" ]5 H8 t - model: {
) d5 ^; k+ `! a& w - renderType: "light",; G' i9 t. o6 H
- size: [1, 1],
6 k, |7 C/ I+ D3 Y4 K - uvSize: [1, 1]. G' J$ o" ] O9 M% [
- }
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- let f = new Face(info);8 p9 ?' m" h7 m: Z. P; |
- state.f = f; d( U4 F+ r0 I$ G, f* U6 x: y2 n
& j5 Z0 s# X" D) s {5 ^+ q4 V. [- let t = f.texture;/ k7 D: N( y3 s p+ ?
- let g = t.graphics;5 H9 d+ T! `5 B! d- A, w
- state.running = true;* t$ U0 E9 X }8 ?. j
- let fps = 24;" G6 U5 z+ T3 u0 U7 `/ Y. E( u. ]
- da(g);//绘制底图
1 x$ @ B3 q, g - t.upload();: E& i, }8 Y: j4 @. g5 [
- let k = 0;/ h/ q) _5 i2 \! f8 d( g. f
- let ti = Date.now();) q" @: \% ^* ?* w# u
- let rt = 0;! L' _) G7 J3 g) w! R- d) o1 y/ ^' J
- smooth = (k, v) => {// 平滑变化. `9 J- c! D) C3 R4 _; d
- if (v > k) return k;
( t# J8 B7 T2 V# d - if (k < 0) return 0;9 q5 C% X4 ]( f5 W" |+ Q4 `) Q! N
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 ~1 }8 `- U8 t4 F: k5 K% B
- }
C& K% I/ L% p: P) Z1 w0 E - run = () => {// 新线程
5 I3 ?1 Z o- [: z- k0 B - let id = Thread.currentThread().getId();
5 j+ S& ^, c2 U! B - print("Thread start:" + id);
9 p, k5 X( I$ M- ]; }5 w6 O3 d1 W - while (state.running) {" ]3 N* @ F- W0 T3 R, Y: A
- try {
) ]8 \4 j) j7 K3 z$ t - k += (Date.now() - ti) / 1000 * 0.2;
$ c5 y I& U( Z1 a" ^$ N - ti = Date.now();+ F, r$ q2 v! w2 `+ a& a% X
- if (k > 1.5) {
* _& i" k. c; r* w/ |5 x; ]. z7 a - k = 0;
+ ]: q( Z5 }! Q! Z+ V. a7 v5 {2 U - }0 L0 ]" _6 \9 v6 d
- setComp(g, 1);
$ F# N3 ^2 f, i% i) b - da(g);
& G6 z% ^9 F. C! A7 D - let kk = smooth(1, k);//平滑切换透明度
" p7 S9 t, f: T& S+ Z - setComp(g, kk);5 S5 D0 B! W) _* j6 b0 ?6 n
- db(g);
5 T& z# t/ S+ v - t.upload();; l5 }$ ?; f: n' n, C; F6 \
- ctx.setDebugInfo("rt" ,Date.now() - ti);. J% _+ x$ g' H. R& W* ?7 s- |
- ctx.setDebugInfo("k", k);
' P. J! ]2 F, U - ctx.setDebugInfo("sm", kk);
; E- e5 S. k% \1 P, ^ - rt = Date.now() - ti;7 s0 l$ V* h8 d4 D
- Thread.sleep(ck(rt - 1000 / fps));
/ ~# ^/ C% N4 X$ W8 x' E9 n* X' W8 v - ctx.setDebugInfo("error", 0)" c- V: W, Q/ E8 c
- } catch (e) {5 W) n0 w6 y+ B9 y
- ctx.setDebugInfo("error", e);; c5 w- Q9 |$ w( T
- }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
: X" _: ?; U0 d. l8 q% ^# _ - th.start();$ ^$ M8 {0 W( U: A; A% K# Y6 a
- }: _( g' f y2 R% W3 U0 ]
& ?5 G1 }# I7 @2 b8 n+ Q- function render(ctx, state, entity) {2 ?8 B! \0 }6 t1 l+ @
- state.f.tick();
+ X O5 z# {/ i4 b$ \: o - }( |( y1 o( W6 D
6 l- [: f3 b9 z9 B- function dispose(ctx, state, entity) {2 I6 J" ?8 N* H9 c
- print("Dispose");! K; m" F( Y/ Q7 R2 u3 w/ Q0 Q) [
- state.running = false;
8 o0 u/ d( y; t1 {8 T) m3 w: g - state.f.close();$ z, [' r" o8 K4 }
- }2 k" ^7 b7 B$ z: n, T
- ^" T. A! p: R) B/ u- function setComp(g, value) {$ ?# ]2 ]" v+ L2 f1 }# g0 g. Q; T! T
- g.setComposite(AlphaComposite.SrcOver.derive(value));+ S5 m" F9 l0 v# K- v
- }
复制代码
5 x) b; A4 E% o8 B2 l+ L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)
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