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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。
( z+ g1 K y4 S! A( U. ?* D0 P- importPackage (java.lang);
; k, M# H$ G: x - importPackage (java.awt);$ @) t& i' {9 V, p
- : I& I6 Q, I6 m# J9 [5 H
- include(Resources.id("mtrsteamloco:library/code/face.js"));/ g# X6 s2 s1 {
- h: A9 r$ K7 g5 u5 j3 C- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. ]" v, d' F! p! B, F$ ?' }- c2 i. J" F - 1 j" d" M5 ^9 t" Y
- function getW(str, font) {4 B, n5 l A! s
- let frc = Resources.getFontRenderContext();
% b7 S/ V" H. G* g/ b4 c - bounds = font.getStringBounds(str, frc);9 t2 D) T. |7 J) }3 ^
- return Math.ceil(bounds.getWidth());
- f, q3 R! {2 x2 `. o# T' \ - }
d ^7 w) _: Y. ?, h
* C" P3 R8 z( k8 Y4 a' ^$ [- da = (g) => {//底图绘制) I& O9 {+ B0 L
- g.setColor(Color.BLACK);" g# G$ |! V1 Y( L
- g.fillRect(0, 0, 400, 400);, b7 L, i9 k0 b' I9 B5 L
- }
4 U( X* F' W6 `; [/ p, L/ f: _ - 1 s' B1 N- `# Y& m* A
- db = (g) => {//上层绘制
' B# x& P, G! f c5 l7 w - g.setColor(Color.WHITE);# a1 E& E; w. W( ^6 s
- g.fillRect(0, 0, 400, 400);+ T$ K- n5 k/ p7 R, ]: `5 p) O
- g.setColor(Color.RED);6 O) x5 h8 N" ^! W G
- g.setFont(font0);
6 |1 E8 \6 T0 w$ u - let str = "晴纱是男娘";# }- ]$ [* Y+ H) U4 G) [- _
- let ww = 400;9 d; p+ K4 K1 q) Y4 i
- let w = getW(str, font0); u1 H% R/ _* V1 L, r
- g.drawString(str, ww / 2 - w / 2, 200);+ t" ]- C: W8 b3 ~ w: Q
- }% h1 T7 a" J( y1 g% t: a0 Q5 ^4 k/ i
5 x7 K( ?6 d. u% ~! s- const mat = new Matrices();2 q& c p6 `/ |: O* x
- mat.translate(0, 0.5, 0);
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# e0 M4 C# ? r( k0 u( t- function create(ctx, state, entity) {
7 D- _/ G& Z( b% X i9 X - let info = {
/ B O* {. j: y. \: t - ctx: ctx,
% i1 G. c+ i, }, G! u, c* ?2 h% k - isTrain: false,7 v5 T& ?5 {5 r6 ? d* o
- matrices: [mat],: V4 Z5 f, t8 X4 E) _
- texture: [400, 400],; W0 E. G; r0 x4 K' w/ O$ x9 S
- model: {
& [/ e$ Q8 F3 M8 Y6 ~- c - renderType: "light",/ W$ A& y) B. i/ A9 n+ M
- size: [1, 1],9 H( m# q3 P6 c% |$ K
- uvSize: [1, 1]
5 f u: c& n. |3 n( O8 o) l6 R - }
( d! K" V/ s- @7 f- k! X: R - }
7 ?$ E. ~5 Y4 V% V9 u - let f = new Face(info);
2 L7 y; I1 n7 K% Q$ D% n( ~; O - state.f = f;9 b8 `# V* x: G+ p4 k
) L1 H) A! F8 F- J2 }- let t = f.texture;9 e% T4 r3 h8 s* w8 K; B% }8 A8 w
- let g = t.graphics;
) Z) p* i2 x4 S5 ?7 r - state.running = true; p' J8 F) z1 E ]0 B9 Y0 L
- let fps = 24;' ~/ x: H+ I% H; r/ }4 Y3 x; Z
- da(g);//绘制底图
$ H2 a1 V& ]% S6 U! B3 \1 Q' } - t.upload();7 k9 r4 q& Y& o) q' p
- let k = 0;1 Y% ^* P2 [3 p! b( O# b, ~
- let ti = Date.now();% i( g; Z: k' v z
- let rt = 0;
7 b+ v6 F v- _+ ^2 X - smooth = (k, v) => {// 平滑变化# w0 f, t3 j: [0 C' y1 n- h
- if (v > k) return k;
, J% N6 i# f& v# E - if (k < 0) return 0;$ P$ r) A; T* X h6 X0 E" K/ y2 t
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
) n/ X I8 p& Z" s - }
]) E3 Q1 f# D8 B/ K7 h - run = () => {// 新线程
5 {: ?9 q/ H- v" Q6 L - let id = Thread.currentThread().getId();
* \1 b I, E6 E( { - print("Thread start:" + id);
3 X7 a. a& A' @0 e7 Y+ U& u - while (state.running) {6 ?1 [" x" a9 K! o
- try {, J- E3 w3 R7 j5 k7 S, x. t9 t
- k += (Date.now() - ti) / 1000 * 0.2;
+ z( y- y: \* N; ]8 x$ M3 k - ti = Date.now();
. C! c7 F* Z6 T& i( d6 d - if (k > 1.5) {
: p/ [& @$ `+ i3 H d! E5 \ - k = 0;; v4 ]" b& @9 {+ N8 Y
- }/ W0 x9 {! `( }1 v
- setComp(g, 1);. k$ e6 }" D. I3 Q* z, ?( n% j
- da(g);0 n; {9 y' x4 W9 M
- let kk = smooth(1, k);//平滑切换透明度
* Z, }/ i L9 c3 Y+ q - setComp(g, kk);
2 n" K! I. f6 h- B5 ^) i6 e1 Y% ? - db(g);' ~6 T* [$ ^. o# p" o% v& B
- t.upload();
7 [2 l6 V, F# s4 Z3 t, ? - ctx.setDebugInfo("rt" ,Date.now() - ti);) U! ~" x6 d' Y% H5 o S! }: p* O
- ctx.setDebugInfo("k", k); ~! Y$ V% v0 w
- ctx.setDebugInfo("sm", kk);
) e4 }* \! [4 k3 v4 O - rt = Date.now() - ti;' T p* W; `. c+ `5 B$ I
- Thread.sleep(ck(rt - 1000 / fps));
5 G/ b" ~: h* U; I% |+ ` - ctx.setDebugInfo("error", 0)( D! i: K6 h$ `7 a# M
- } catch (e) {0 z9 p/ M( `: C9 ?, A8 k% Q& }* w
- ctx.setDebugInfo("error", e);6 [+ n. f: |! C7 ^, x
- }1 \5 u% v0 T. p v9 D
- }
) d% b4 k& J/ x1 }' k - print("Thread end:" + id);. m+ n$ [1 I" [
- }
8 _. N2 p+ a& e3 ?; V$ D - let th = new Thread(run, "qiehuan");( |1 k6 N: R$ O7 U0 q9 P
- th.start();- R' r, X% |( M! R' n
- }; O1 }( Q) U7 \' E
) d$ h5 U9 T3 d* g- function render(ctx, state, entity) {
3 g& K- q' s" \6 U% V4 o* t - state.f.tick();( k- l8 }) S; V9 o, G! N& k: {- L2 w
- }3 P1 U& I% k# W+ l h9 ~
4 K ?, V r' I0 O% H& I- function dispose(ctx, state, entity) {6 U& N, P+ Y6 }& |! h4 G
- print("Dispose");
; Y) z# y7 D) A0 b - state.running = false;
. ^+ j/ L, f. n* K, {! |! V - state.f.close();9 ?/ ?; k& j( h# R- q$ i; } v4 H u
- }- R- `6 P! O. P2 n& H5 ]3 K
- 9 I" Z& ~" J* D& B2 R8 l' c
- function setComp(g, value) {
) N% G( w' Y2 p* Q! W3 D - g.setComposite(AlphaComposite.SrcOver.derive(value)); v4 }" ?9 s) Y* m0 T" C& {( O
- }
复制代码 * x5 q7 k% ^; V3 T
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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* y# l/ R3 I! v7 A9 b顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% ~" p4 O- X- H1 s* L
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