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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。
" n* b4 l4 n( x4 Y. Q9 B2 k3 n- importPackage (java.lang);
) }; I t& h' N - importPackage (java.awt); D$ _) l+ o: f3 f* G7 H& u* Y: i
2 \' ?3 O. r. t/ K- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! D; A: Y4 y4 I( O3 m6 S5 ?- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 v* J7 z1 U* H& G4 C- `& h$ ]
& |7 c# N7 A% m0 Q! t# a; n+ I- function getW(str, font) {7 a- c2 v- b$ _* l
- let frc = Resources.getFontRenderContext();
4 Y/ j K; u# ^* R - bounds = font.getStringBounds(str, frc);
7 e# }& l0 b, x6 S9 ? - return Math.ceil(bounds.getWidth());
$ A+ X+ i! T4 } - }
. S" V9 w/ r% T" ^2 e, X6 N - ' A. S9 o I2 \/ s
- da = (g) => {//底图绘制4 P8 A* e/ n9 f; H. @) Q( w* g8 n
- g.setColor(Color.BLACK);6 U7 p& O* W4 J1 P( O3 w
- g.fillRect(0, 0, 400, 400);
9 h0 ~) z: L1 ]# E! V- J - }: I% n% R( Y* D5 m7 u
. \3 H! g/ ]# B7 M C- db = (g) => {//上层绘制
" A3 [7 v2 H0 O- _ - g.setColor(Color.WHITE);0 w- B5 Z5 O) J) v: H6 R
- g.fillRect(0, 0, 400, 400);$ k' C. `7 @+ l6 D+ h
- g.setColor(Color.RED);5 I! F" F! L& B+ s" B/ T; i
- g.setFont(font0);
" V7 d) C" m) x4 g( ^# ^ - let str = "晴纱是男娘";$ C( z) T8 G; z" ?( H/ h q) O
- let ww = 400;
( f) [2 a3 @7 d9 r. G5 i) t - let w = getW(str, font0);
" s* ]3 T. C2 M, M* U* k - g.drawString(str, ww / 2 - w / 2, 200);- L1 Z3 L" g% p6 W# T' M( ?
- }
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3 V, s9 _- V2 ]/ u, `% J# e- const mat = new Matrices();
) t. J) k4 I( l. F5 y ` k8 g - mat.translate(0, 0.5, 0);1 e% j) g6 l2 U0 _
( A# n o& W$ A9 a* i) L I$ ^0 I- function create(ctx, state, entity) {
' f" D- S' I4 F+ A8 c - let info = {
; j2 t/ m( `# G - ctx: ctx, D7 j0 v1 `$ ?, J
- isTrain: false,! Y: f0 ^* ^' S6 u, H3 r K0 l
- matrices: [mat],1 u+ ]( X7 O4 x: K
- texture: [400, 400],7 U7 m" O$ v) f: p m
- model: {2 z( b9 X" m3 h1 ?6 z9 R
- renderType: "light",
1 s* y9 ?$ n9 c7 }$ T - size: [1, 1],
4 A2 H" `2 ^- E5 n$ h - uvSize: [1, 1]4 _" F" M3 d1 c
- }
. A" i8 B& D' R4 e - } j4 `" W3 w$ Z5 ~
- let f = new Face(info);
* g0 t; i3 @7 k: k - state.f = f; w/ z# V$ G# h; J! E
( ]- ~( Z0 F- N9 Z6 N- let t = f.texture;
% _% D# ^& L Q/ X6 v/ Z2 S. B+ b* s. N - let g = t.graphics;" D7 U' s" t/ W, _9 v6 G5 {; E
- state.running = true;
# G0 Y& x6 [4 A/ e. Z - let fps = 24;; G6 X$ n9 C- _
- da(g);//绘制底图
2 J, j( @. _, \+ u/ _8 F' w - t.upload();
4 X; D, d' N9 o" f8 {# L* g7 [ - let k = 0;) O, j3 {# J2 k6 T; |3 \2 V; [+ Z
- let ti = Date.now();* y3 E/ K; R* T- W, F/ L
- let rt = 0;9 f# X7 a7 G+ O2 e/ d
- smooth = (k, v) => {// 平滑变化2 i4 J. u! Y1 v* g
- if (v > k) return k;
$ v3 O; w3 ^8 S# s/ e2 \ - if (k < 0) return 0;/ O7 ~3 z6 {3 M3 w- U& i' B$ P& o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ S3 Q' k! c) O/ ^ - }
' Y8 Y3 I9 Z6 B! j6 z - run = () => {// 新线程
; O1 C0 Y$ U. E; v - let id = Thread.currentThread().getId();
! T+ o* s: m+ w3 | - print("Thread start:" + id);7 m+ @) {: C$ |) j
- while (state.running) {
0 P! ~& c( m! A' v) Y/ F - try {: M) m! |) h! h0 C6 `! N$ x
- k += (Date.now() - ti) / 1000 * 0.2;
$ q# X) z& N& p8 Y# A4 y, r - ti = Date.now();. w" ^+ R) E z+ R' B% u% o" b
- if (k > 1.5) {
5 V5 `! h% I7 ^2 l - k = 0;3 D9 u; o: K; _* X8 H7 ~# {
- }
/ y' b" r7 u# O* d1 O, O4 D - setComp(g, 1);
9 t: e4 Q+ w; ^# L, V, B' L% D - da(g);
3 Q; I( z# Y3 E- G) D* v! e - let kk = smooth(1, k);//平滑切换透明度5 {0 h) n9 G3 M5 t( D
- setComp(g, kk);
) z& \1 i& P+ g( U! L - db(g);7 `- F" I0 N) `6 f) R4 G/ J3 `
- t.upload();: n: ?5 o2 W# o Q
- ctx.setDebugInfo("rt" ,Date.now() - ti);
1 d; p* e" U( t2 Q - ctx.setDebugInfo("k", k);
3 G# z. O# F* m& O/ w1 s) L( m - ctx.setDebugInfo("sm", kk);
S* e& K: }7 `6 A9 i6 b. d - rt = Date.now() - ti;" @5 J9 k% Y/ `, N
- Thread.sleep(ck(rt - 1000 / fps));/ u! S5 m+ [ k E
- ctx.setDebugInfo("error", 0)
# F1 Z$ d& R" h$ E k. `* X - } catch (e) {# H/ a+ L* [4 g2 Z
- ctx.setDebugInfo("error", e);
; `/ L3 V( [& L - }1 z( W* G0 }) n E% h) ]
- }% `( o' n1 v2 ]- o' c) l6 W
- print("Thread end:" + id);6 X' i2 V, D( s! g: m+ B+ x
- }
, z" m# I) q: k/ Z C6 G6 u8 t* f - let th = new Thread(run, "qiehuan");3 j- U0 I$ B7 f3 {8 G
- th.start();
{( R4 J, G* P/ C - }& `) k. V% @! O9 z* l
- - x5 o. Z& E: u. A5 V
- function render(ctx, state, entity) {
5 {( e+ l0 I3 ^# N8 d2 z - state.f.tick();* Q: D6 H6 c2 h' [* b$ K
- }
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- function dispose(ctx, state, entity) {
1 c/ r& L8 H* s' y: C! @+ t8 } - print("Dispose");# [+ b/ \" _% k4 y3 y5 o
- state.running = false;! f7 ^8 ]' G7 |+ B& ]6 ?
- state.f.close();
% h7 u: s$ K! L0 F. S4 F( I - }; {2 L9 {' {* u
- + M6 \3 M3 H/ D. u
- function setComp(g, value) {
# E! V [6 _, e- C, g - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 m2 h- ~8 O' B0 Z3 a - }
复制代码
6 L; u2 f$ p5 U z* B7 G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)" E$ F1 }8 @7 b! d' C8 U+ k
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