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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。
: t$ }: M1 N5 i; q. i- importPackage (java.lang);
0 ]; s. e7 N6 U8 ^& f$ d - importPackage (java.awt);
. y$ {9 |/ A; X) U& P - 4 ]: w0 q3 {& t" Z: q
- include(Resources.id("mtrsteamloco:library/code/face.js")); }$ n' Z5 K! o! X i3 Y5 K+ u
- ' v* M6 j5 s/ z- n( B; Y( D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. [$ A# {) X; Q. d. F# s) {& @$ E
; Y- i( b- \1 o0 H3 o- function getW(str, font) {6 e# M" n' @7 g3 b/ A0 G
- let frc = Resources.getFontRenderContext();
$ {. V5 E5 |7 \7 T% V0 q% R* t# _ - bounds = font.getStringBounds(str, frc);% T {& p6 c' Y" C. n
- return Math.ceil(bounds.getWidth()); {$ s0 T; T9 n- G; ^- }
- }
, U4 w* h( e1 I - + k f. H- C# ?9 d& A9 n* d
- da = (g) => {//底图绘制/ G$ A& m: i5 |$ o1 R
- g.setColor(Color.BLACK);
2 _7 G6 n2 _# Y& e+ U8 c - g.fillRect(0, 0, 400, 400);
7 m$ R9 _5 Z! O- j; O - }$ U- y9 r% _) h2 u' j/ M
- 1 w1 n: c; E+ E9 P& d7 O
- db = (g) => {//上层绘制# N- l# ]7 ^/ `3 p$ g7 r
- g.setColor(Color.WHITE);
$ { Y6 J, m3 s4 ?! c8 J: J4 K8 \0 K* g& B - g.fillRect(0, 0, 400, 400);$ w1 [* D$ O7 j7 K
- g.setColor(Color.RED);
2 h+ u' e4 Q8 w - g.setFont(font0);
. Y) B) D( {" C* f0 F - let str = "晴纱是男娘";
3 M0 B- g. j8 A7 N( e" f9 w - let ww = 400;
# o A: |' y9 C - let w = getW(str, font0);
, L6 L" U/ h5 t/ d - g.drawString(str, ww / 2 - w / 2, 200);4 w) {. Q& R$ P3 m' ?' m6 o7 ~
- }
( d5 t* t4 n. G2 z! A4 J: e - 9 ~% M1 a6 P! ]9 h J4 J6 `- }
- const mat = new Matrices();2 L( V7 X" I; Y& l$ G8 k0 C1 C
- mat.translate(0, 0.5, 0);+ @5 ^2 u `! X. [: c/ t
7 k& v |! F1 {' x3 o1 m0 {& `" C4 P- function create(ctx, state, entity) {
! P6 |5 Y4 f- T v+ @, ^ - let info = {
' J& I0 I# f7 T3 N; E1 e - ctx: ctx," Y! F9 d9 W/ ~$ ^' b
- isTrain: false, `$ E2 ^/ H' N
- matrices: [mat],
8 G8 i3 l; ?1 h- h f5 j - texture: [400, 400],3 ^8 J9 c# D6 G! x
- model: {
5 }5 g* ` G3 }0 j( g! e: M - renderType: "light",
& t5 Q. a! h. z8 i$ O - size: [1, 1],! ~ s8 q# r3 ?) {1 G3 Q+ q
- uvSize: [1, 1]0 ^) L) f7 c# E% {- J; }& d
- }
/ v6 t0 ]* Y; _7 N - }
: z7 h" |$ l# ?7 H+ S - let f = new Face(info);$ w; Q) m! ^+ r6 B+ @4 G8 N
- state.f = f;: S0 Z0 q) m8 d/ ]; C% ~% V: h2 k
9 @( A6 _* m: c2 |* e4 [& J/ J- let t = f.texture;
4 r, l4 r) A; @, u - let g = t.graphics;
( W+ P& n N+ P1 k2 m. h2 \ - state.running = true;
% V4 {' U4 w* ^ - let fps = 24;
4 D; b0 h) r% ?# c. M - da(g);//绘制底图
+ S6 l9 h6 g# A) S! ^: l - t.upload();; `3 G( W- q2 o" F% {
- let k = 0;* t+ X- L% M$ ~" R! y
- let ti = Date.now();
" j R4 e) y6 n' X0 f) o c+ B6 U - let rt = 0;
- C) N j9 N! d: | - smooth = (k, v) => {// 平滑变化6 ^4 z7 w) o3 R+ S* M$ _ K7 b7 p
- if (v > k) return k;
% L8 W' Q8 b5 U' n) S - if (k < 0) return 0;- [5 I/ Y. I' [9 ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 N0 q6 Z; Y4 c - }* J; @: I: `) R2 U& S: p9 m
- run = () => {// 新线程
7 ]2 E5 K9 n/ ^' t. c - let id = Thread.currentThread().getId();. e) C4 ]2 @, ^# Y
- print("Thread start:" + id);
: J8 g( G& b: h$ T- B - while (state.running) {
/ m( b8 g% B! G) v3 F - try {
9 s+ M( O e6 ]. b! {) n - k += (Date.now() - ti) / 1000 * 0.2;
! {1 p w# J/ v6 ~ - ti = Date.now();
0 z* W: u" o6 p! B- S - if (k > 1.5) {
7 b, ?; [, P" @% y" p9 Q - k = 0;
; }5 X( j4 @7 e: F0 N) y/ w - }
) [* Z) [( S. k( ~2 E, L4 c- V& ~ - setComp(g, 1);
9 B4 ~4 l) h5 I - da(g);
/ f( u+ c& O4 o% y - let kk = smooth(1, k);//平滑切换透明度
$ s2 a! b# R& h2 F) B1 [- l( L& n - setComp(g, kk);
7 L: P1 z) v" H+ [+ { - db(g);6 e# L/ t4 O7 h( ^* \8 G
- t.upload();
2 P, E( f! ^, U8 @4 J - ctx.setDebugInfo("rt" ,Date.now() - ti);( P/ w4 H9 B6 K; }5 d
- ctx.setDebugInfo("k", k);8 I; y! f9 M8 {, z
- ctx.setDebugInfo("sm", kk);
, u- [" [5 h d. J - rt = Date.now() - ti;
* S/ I U0 d, R9 }+ X - Thread.sleep(ck(rt - 1000 / fps));
! R) c! ]% n: y - ctx.setDebugInfo("error", 0)( i: O* o5 F9 D1 g
- } catch (e) {
3 Y, {! [- a* Y8 L - ctx.setDebugInfo("error", e);3 p5 m h: b( Q+ `6 `; ]/ F7 ^+ i
- }
: M* t! u. G' M* n6 Y v/ d - }
+ h# n. S7 h/ b& _. V - print("Thread end:" + id);1 O' A/ J7 t" D( U9 F
- }! M7 {% s" V4 B% U7 N3 a
- let th = new Thread(run, "qiehuan");
4 [5 W0 f) Q7 h. y! w - th.start();1 W% w3 l- {: M2 r+ m
- }: s- q/ v) ^, J) G9 W
- # p2 V: \$ N2 V3 ~8 U
- function render(ctx, state, entity) {
; h1 y' k9 M* p. ~) t0 m. z- g - state.f.tick();; [2 o/ H* W, d4 q! ~2 T
- }
7 f' ] ~0 c. m- D1 J F
7 g9 N4 U" R& r$ J/ _- function dispose(ctx, state, entity) {
; ?. u e( N- m7 i" N - print("Dispose");
9 i' U) O6 f y% {; c - state.running = false;
3 v6 g4 L& G: f" u - state.f.close();, R+ [5 \" y- T) }3 |
- }
; S) |8 T* ?3 Q2 U0 v
n0 S) q$ f" I5 o2 ]- function setComp(g, value) {
' b. c% _$ \# @% ] - g.setComposite(AlphaComposite.SrcOver.derive(value));
9 b) L" L, C6 g - }
复制代码 ( F8 M5 s& o4 O( {/ R+ p
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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p/ ~( D- B. T0 n( Y$ A+ ^2 Z% U( k
% N9 B9 Y' z0 e( V7 e4 V( 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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