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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。
+ i8 c/ B3 K7 |& v/ h6 E- importPackage (java.lang);
4 j1 i" {( V/ g& Z& u# ^( y j - importPackage (java.awt);% V- r. y# s5 Q7 L& b! e9 j
, H1 W' A, ]8 d2 g. S: |- include(Resources.id("mtrsteamloco:library/code/face.js"));& n# p; x! O7 G$ F$ M' ]
( l$ f: b2 v: z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
; R% k# o5 l( ?, T/ r. e3 y6 N5 ] - / m2 d3 w: q0 d$ `( y: `! v
- function getW(str, font) {5 ^' |2 R- s u( d& Y- p' w( C
- let frc = Resources.getFontRenderContext();
; p( q# ?7 |. b0 U: _2 M - bounds = font.getStringBounds(str, frc);
2 A' s6 f9 ]# n2 F$ O0 R - return Math.ceil(bounds.getWidth());
; f* H! }- d. F$ B% m - }3 A+ P3 R% l6 M% u" m
1 K' A5 N ]: {* G) M) @4 u- da = (g) => {//底图绘制/ t+ W/ X' C5 l$ T; }) G
- g.setColor(Color.BLACK);
+ B4 T3 r y v2 O" H4 |0 } - g.fillRect(0, 0, 400, 400);
' F( p! U5 \' H- M$ ~$ M, g - }/ R% `- g. @* `/ d$ V& R
: [$ Z8 ^/ ^+ R" d/ }1 y' }+ _6 j" u- db = (g) => {//上层绘制
N) E- {% w$ u - g.setColor(Color.WHITE);
w, q" j% c; U" z& F& m% U - g.fillRect(0, 0, 400, 400);& u3 f6 v9 o6 q" _
- g.setColor(Color.RED);
& R% V9 U9 W' D$ Q, F. |0 Z - g.setFont(font0);
$ O8 ]' Q2 n0 h" W; |- @/ h - let str = "晴纱是男娘";! c& f+ J8 j! f
- let ww = 400;8 P0 |0 M _8 w' {& [8 U& i
- let w = getW(str, font0);
2 y4 ?$ K) I% @; S - g.drawString(str, ww / 2 - w / 2, 200);
0 i6 V+ `: C# X8 D* R1 g0 L! x - }
% l6 n& [$ t+ f( q8 ?: L3 j
( S X0 y9 P) G- const mat = new Matrices();
, U1 j" I3 ^ B- i. s2 j" U' E N% j - mat.translate(0, 0.5, 0);
0 K: u7 I- _" o - ( G2 |6 a f/ v- p
- function create(ctx, state, entity) {
. G8 t+ U. X! [: w - let info = {/ P' Z8 R* A! f$ X4 o
- ctx: ctx,% z# v& q) \- @ @
- isTrain: false,
! L: D8 b3 N$ }/ K3 f - matrices: [mat],
7 V( ]! ~$ C4 @% c- Q - texture: [400, 400],* C+ B7 L" v) s m
- model: {5 m- y8 t) d, s! e
- renderType: "light",
5 m1 K: k0 Y* X; V - size: [1, 1],
; U0 ?8 x/ a2 f* w+ Z - uvSize: [1, 1]
3 r# w$ I8 \1 i/ a a - }
+ P% ^1 {8 m8 l' d! [3 _ - }
7 S+ [1 d4 X0 D" p - let f = new Face(info);
2 s/ V7 [4 K3 ^* k7 | - state.f = f;
( } m" b$ @ h
) a' K! M% p& [0 L- let t = f.texture;- Q' a+ V% q v. z' N' o
- let g = t.graphics;
8 j o6 Z# L2 U1 {: q! t - state.running = true;
" e j8 d! ^9 x8 D# x* ? - let fps = 24;9 L- ?* w# ?! _" o. G0 Z9 U
- da(g);//绘制底图4 O6 `) b }5 |6 c; K; K
- t.upload();' i* i1 ^4 |3 j% M7 W% O; I
- let k = 0;* l! y* ]+ Q$ y) H' G' B
- let ti = Date.now();
4 A$ R; ]# ~3 f - let rt = 0;
0 w8 `# s) w" Y/ x, z q$ M - smooth = (k, v) => {// 平滑变化" |; T% `9 T; n
- if (v > k) return k;5 s; r& j" ~5 r: F& K
- if (k < 0) return 0;3 ?' m+ f6 l5 z' W% ?. t* g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 b9 ?( R7 f7 ? - }
6 b5 Q z& |6 R0 b - run = () => {// 新线程2 z$ X; ^+ C( {& c* V# v) V
- let id = Thread.currentThread().getId();0 c# I' J$ h: a
- print("Thread start:" + id);
1 \4 B" K, s+ w {* {9 V! C3 ^ - while (state.running) {
' i$ C' u4 U4 f, M0 J - try {
5 d. D4 P! t8 e2 a5 ~ - k += (Date.now() - ti) / 1000 * 0.2;
: T6 m8 Z9 r6 T7 e+ {# B# e - ti = Date.now();
9 B, a! j$ d7 b - if (k > 1.5) {
+ O5 M5 i) S; o+ u! } - k = 0;
- z* x6 k9 W- e U# G, m% u - }( g& {+ C1 j% ~: K; K
- setComp(g, 1);
. M4 }6 f' L) t, d$ r - da(g); h5 ]% e3 Q2 W M! s7 d
- let kk = smooth(1, k);//平滑切换透明度1 v! l1 g1 n( N, v
- setComp(g, kk);# ?; F2 y; o! h( v! a4 @
- db(g);. c5 h2 m& n$ P1 O
- t.upload();0 q- v; _* y' o" i. L! N, _" _
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 T) n$ V( s' _
- ctx.setDebugInfo("k", k);
) ?% K5 P/ d; ] - ctx.setDebugInfo("sm", kk);$ Q( L- }; l7 a' M$ P* e' ^
- rt = Date.now() - ti;
6 v% J6 i6 l( h8 V! W3 s( r& T: N - Thread.sleep(ck(rt - 1000 / fps));
7 @+ e7 V- J8 O+ d - ctx.setDebugInfo("error", 0)$ L. u# q$ o. L3 T5 l* K+ B
- } catch (e) {# b4 G2 l) }7 S3 E; [+ d1 V
- ctx.setDebugInfo("error", e);& v1 y. M; _5 F' c
- }
' S6 d1 d+ O# K6 R* w - }/ {! p0 i; a" Q" _" \1 [
- print("Thread end:" + id);
6 k/ W' ^) n. c8 |1 H) R" Z9 T4 n( d - }
* C) K/ y7 o6 t: p - let th = new Thread(run, "qiehuan");
2 x( b1 A7 q I - th.start();
n, j/ y8 n- v. T, i - }
% ` x/ l! ?! B( G8 V {% l6 N' g
2 L9 F( ^) O' e- function render(ctx, state, entity) {" T: Z4 }% M; j" |: a
- state.f.tick();
3 q c& R0 g! E7 g- U( @3 _% ` - }( a5 v \2 ^2 Y* P8 S
- K6 P* u6 F. y9 C* X/ d, J- function dispose(ctx, state, entity) {& L8 n+ g( B% N* G& v
- print("Dispose");
% T: ~2 G4 j" q; t, A- | - state.running = false;- {8 b8 e; `& O/ f6 R0 L3 d: `
- state.f.close();/ U# S7 P6 \, n8 T3 x6 I) C- ^
- }: q+ w6 y2 s' W
7 p$ H! o( o/ I- function setComp(g, value) {
2 K! B8 n7 d5 f# B- s - g.setComposite(AlphaComposite.SrcOver.derive(value));9 D" z3 `. ~- B& k1 D% _
- }
复制代码 1 ]/ a4 Q# E) e$ {
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。8 w" q: U( ] W, C) y& x6 F
D# W: }5 ^6 Y+ L% [( F+ Q
- A+ ` H8 K! I& |顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). C3 v. q/ L) ^/ e4 Q
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