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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。1 H3 I+ D5 m; r' y e
- importPackage (java.lang);1 ^5 J# k. y0 G, B [
- importPackage (java.awt);* [# u2 a! v$ o& A% `
- 7 k$ x) d% e0 x, `
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ R& Z$ t( e3 {
, s) i6 }% k8 a1 n5 @4 Z- function getW(str, font) {
9 T& X5 z( B- a - let frc = Resources.getFontRenderContext();
# y' p2 W3 o4 W( f - bounds = font.getStringBounds(str, frc);" ?5 U" Y4 W( _3 O& n; L/ G' E* G ]
- return Math.ceil(bounds.getWidth());
* B0 ?' M: U4 x9 p9 D% b* _$ G - }
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$ k( [+ J0 t/ j! p" @) j- da = (g) => {//底图绘制
# W- Z/ v N; R' A l3 m - g.setColor(Color.BLACK);
" X1 T( f5 E. {$ m - g.fillRect(0, 0, 400, 400);
! Q1 z1 M X: b% _& t0 j+ [$ c* @ - }
5 ~/ N8 J, \2 K. p2 U" d+ a8 P
4 j+ j! J: [' E5 l' t [- db = (g) => {//上层绘制
% {3 ~9 r5 s2 E7 w. E; s - g.setColor(Color.WHITE);6 O# H5 B# r7 S3 a& T! `+ @, B% Q
- g.fillRect(0, 0, 400, 400);* e8 ~% a& B2 }( @0 f2 F* d
- g.setColor(Color.RED);
/ W* X6 i" K: [8 ~$ @8 n: s - g.setFont(font0);
5 K' B( D' m3 r: E; l - let str = "晴纱是男娘";& }0 J2 c8 {/ Z4 P3 F0 S
- let ww = 400;. h/ |9 }0 j& T& F7 `
- let w = getW(str, font0);
/ r& g& O* O" _- i: F" ~ - g.drawString(str, ww / 2 - w / 2, 200);0 [2 b: f) X; G; U
- }$ u- Y- `5 M. S9 G( n, g
2 o! T1 M$ r. K6 X& J' c& G; U- const mat = new Matrices();+ m! \9 i4 Y+ Y
- mat.translate(0, 0.5, 0);: b2 `8 t: K5 r! p- E$ b, C; V
2 R1 i' _* t% S, @& @" `7 b- R- function create(ctx, state, entity) {
; y2 c7 [" o! _4 u - let info = {8 R& j2 O X7 m( _' q: o
- ctx: ctx,- V% ?( K8 r9 \/ `* e
- isTrain: false,
% h7 N0 `5 j/ p( I - matrices: [mat],
5 S, w# ^ {# ?) O n t1 E- N& p - texture: [400, 400],
) K7 K1 R+ \, d' a( O: e - model: {
! r/ P% [5 G( f8 w - renderType: "light",( q W+ j; u4 z
- size: [1, 1],
- E4 k0 a& J7 F8 s+ | - uvSize: [1, 1]
. Y7 w7 {- } r3 @' |$ z$ Q$ U- d - }
' B; c7 _9 b/ n - }
1 V9 e O2 L: y4 o - let f = new Face(info);
) m. c7 Z% T5 d+ p2 `0 a - state.f = f;
' m) q- n. L- @5 w. \) s% k
/ q/ E# n' K: ?( ~3 }0 F2 W- let t = f.texture;
8 r: O5 S. P: S1 h+ r - let g = t.graphics;0 E0 ~+ ~* s; E+ R' j
- state.running = true;8 s3 Y2 x4 M: V4 B3 P
- let fps = 24;
, b# q/ w$ u0 M6 x3 W - da(g);//绘制底图 i# r' r' @: M; v
- t.upload();9 _- g/ h% t* d( Q$ i
- let k = 0;
2 P& e1 {. Y1 V' L4 X! P2 d& w - let ti = Date.now();
. Y, @6 O8 C+ R% j- R- a - let rt = 0;; U; h. K! a& E9 u
- smooth = (k, v) => {// 平滑变化
% F9 \7 Y) @) g - if (v > k) return k;- M" s( Y$ n$ s! \5 c, H
- if (k < 0) return 0;
) ^8 `: ], M) k- M0 d* a - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- H# ^2 t2 a2 r% @* c3 q! v
- }
5 u [: U( ~/ a8 L - run = () => {// 新线程
% u x: W' a/ e0 o; R3 q9 J+ R4 c, { - let id = Thread.currentThread().getId();, \( V% m; B8 A* d' h& u
- print("Thread start:" + id);
' _* |6 B Q$ L# s# }9 m9 F - while (state.running) {& d! h( r% i( m( p( T7 O
- try {
/ f I2 v' q6 r( @% ^# w) C - k += (Date.now() - ti) / 1000 * 0.2;
* O4 P2 q G) C/ h1 r* `; w - ti = Date.now();
3 J; H* Q% u. D, m - if (k > 1.5) {( g% y- j& a' ?" D
- k = 0;! x) T/ R* _% z0 z- T
- }
6 e0 h% t# L. O7 Y - setComp(g, 1);
- e) S8 w2 t: h0 B C8 e - da(g);
6 g7 r. ], `) m - let kk = smooth(1, k);//平滑切换透明度; x; _/ N# ?/ A- T/ l
- setComp(g, kk);
, g" H9 x$ m; o! w, l8 K - db(g);
; a. u# T& U! z1 P( Y7 ]; [' x - t.upload();
8 E" |" P& X$ m - ctx.setDebugInfo("rt" ,Date.now() - ti);3 b* C& D* Y* D4 A$ U
- ctx.setDebugInfo("k", k);0 w4 u8 U# \1 c
- ctx.setDebugInfo("sm", kk);
0 M u% ^- j( \ - rt = Date.now() - ti;# Q" y3 H6 O( o9 q6 H; J
- Thread.sleep(ck(rt - 1000 / fps));4 d! K- f) K3 ^2 o, F7 ?6 F' C
- ctx.setDebugInfo("error", 0)" l9 E+ j3 g# m' {3 C/ c5 f
- } catch (e) {
) y3 @5 V5 @$ ~ - ctx.setDebugInfo("error", e);( l5 L1 G1 B% _2 e) k# U
- }
8 d$ [5 @% W. k+ Z: F( D+ u - }% O7 R8 \! x" G
- print("Thread end:" + id);
8 t# f1 e5 [2 C H; z - }) Y' G X" L. U$ R' y) @, e1 r4 S
- let th = new Thread(run, "qiehuan");
+ N! X. ?0 o% \8 o5 l- l6 Q6 | - th.start();, k) B* [6 Z4 e8 d
- }" l* M* v* I' r2 p5 J, N/ }. |% r
1 N" I8 x6 s" y, A- function render(ctx, state, entity) {. q7 u# X/ k5 i% M$ d) \
- state.f.tick();
" J6 B# g1 o& R6 K) X- I - }
# p( q0 k$ b+ H7 `6 S# i
. w7 ^8 M2 C, ^0 r" g. b! G- function dispose(ctx, state, entity) {
6 F$ r' c2 q* Q+ x. C$ S6 e6 g - print("Dispose");
3 ?* {# e9 |1 |" W - state.running = false;
0 _$ e( Z/ H2 l4 [! d6 W2 e# ]" d$ Z - state.f.close();
e8 E8 {6 s( D x' @; K - }6 e1 G3 [$ n! ^, D, X6 s
v1 d$ _: M/ J8 _- function setComp(g, value) {! r0 P6 R& |0 Z" J
- g.setComposite(AlphaComposite.SrcOver.derive(value));
+ ]* O9 a# @- @9 k L4 Q - }
复制代码
3 Z( `' ~5 t1 d( `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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8 `; {: x1 n7 ]8 k3 s! k; ^- J+ ?
8 ?4 \: T7 O l6 ]5 T1 M6 ~$ N u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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