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" ]. C9 L4 C1 @. w* k& n0 u5 f% \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。
+ h( q; i! `) \; ^8 i" l- C0 p: |- importPackage (java.lang); F$ v0 I8 g, s5 m* B' A. H/ R
- importPackage (java.awt);# r7 a: f' Q! `$ u( O$ G5 s2 m; W
# ?0 n9 O6 |2 h1 h- include(Resources.id("mtrsteamloco:library/code/face.js"));/ r& N4 o% f( m1 b' u5 d7 i
- 3 l" ~9 S$ r+ t6 a6 {9 O
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. o) v/ P$ c; E" P6 a, F- function getW(str, font) {
$ a1 s. P3 y8 e( R; J# C - let frc = Resources.getFontRenderContext();
) i% \" M+ p2 D+ F. g- q* `4 k - bounds = font.getStringBounds(str, frc);
0 m4 n/ M& N$ T% m - return Math.ceil(bounds.getWidth());
2 G& r- U2 g$ V - }
7 J# E/ ~7 S9 X, O4 J1 U - 5 K$ j+ N5 v# y& u9 S- S" _3 K
- da = (g) => {//底图绘制# ?9 ]- J% X/ T
- g.setColor(Color.BLACK);
7 U2 }8 [/ l& M- V) V0 L( a- @ - g.fillRect(0, 0, 400, 400);- w+ y% e- Q+ O7 m5 a4 L# P! f) b
- }4 f2 X. i4 `! t
* a9 x' r6 P% A6 {8 @- db = (g) => {//上层绘制
, F8 v6 Y: P" I2 ]" v% k, w) p - g.setColor(Color.WHITE);8 n( b3 b, V# M" H
- g.fillRect(0, 0, 400, 400);
4 q! j3 k" H( _' y, H - g.setColor(Color.RED);0 n8 f$ z* o7 o' }( q( S$ d0 g$ a& k
- g.setFont(font0);
6 } w( T- ^4 ` - let str = "晴纱是男娘"; U4 I! Z/ v' a7 o& Z
- let ww = 400;0 F1 f- S/ `# W; M: o' n; [
- let w = getW(str, font0);( S9 @; _8 S9 s0 s" ^
- g.drawString(str, ww / 2 - w / 2, 200);
+ ?4 G# P/ @# z0 a B" G3 d! A - }
- s7 k. i, \( t0 _& L- a! b - & H# C- j: M* n% _; y6 W
- const mat = new Matrices();8 T- Z9 H6 N9 t" ~% s+ r
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
7 U* `& ?* a/ q - let info = {+ ~: `: B8 R3 F4 D
- ctx: ctx,
! f% e/ d/ D. i# ?0 x8 R. n( t - isTrain: false,9 E* D( O* U+ J- Q7 k. R
- matrices: [mat],; v a3 }) u, {
- texture: [400, 400],( _% z. q7 L/ V4 Y: Q
- model: {) t, w' {3 j! A; j
- renderType: "light",
5 S# a& i( D/ } - size: [1, 1],8 P1 J2 x A4 i
- uvSize: [1, 1]7 r) H+ R5 a( l7 X6 C" i' e+ _
- }# o) Y6 m2 }/ D# T- s$ i1 I
- }
; M* c0 v; i! G - let f = new Face(info);
, l, \4 Z q4 y. Y) X - state.f = f;0 I3 l+ O' B* r' e0 m6 m- k: g
- 6 ]( v9 \& j+ _$ f2 A3 S" S# N
- let t = f.texture;
" R3 G+ D4 S3 s% [: T, O - let g = t.graphics;
6 l$ Q7 o* D' P: p) J7 b) Q/ f: e - state.running = true;$ |% W0 @5 w/ @7 j p
- let fps = 24;, {: K5 _- a- m
- da(g);//绘制底图) x" Y5 J. \& v- B
- t.upload();- g4 i4 Q# w* S; U2 C h7 Q o" }
- let k = 0;
. _- F; ]# M- q, N" X1 N/ D! ] - let ti = Date.now();" i; _ {5 P) H8 T5 k
- let rt = 0;7 U2 V. c* k1 p- U! h0 x2 d
- smooth = (k, v) => {// 平滑变化+ }/ U- h+ x% C% I
- if (v > k) return k;
7 c6 j: _6 d; J7 z5 e# O0 d0 y6 n - if (k < 0) return 0;
' }0 @% B$ ` O- e+ c1 r4 W - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- s# |$ y- j2 L1 O& s
- }
' Q4 w; s0 `. r5 C. V - run = () => {// 新线程9 J, F& q) j$ H, V# Y) a, g
- let id = Thread.currentThread().getId();
5 `* O5 L% `+ j) J - print("Thread start:" + id);( M n K. o& E2 T- d) `
- while (state.running) {( [- S" h0 c+ B: I3 {' E+ ^( J
- try {3 R% x% M8 o z+ x# }& u- Q
- k += (Date.now() - ti) / 1000 * 0.2;
; D! |) T; _# P - ti = Date.now();0 y$ M- r0 _1 x/ p/ f+ c3 m
- if (k > 1.5) {" h$ L- u* c$ l- F& _/ B# A
- k = 0; J# u+ A; X* {# L* C* o5 I
- }
: ~/ A5 F2 v- n' }- f d) m5 z' g - setComp(g, 1);/ N, a0 \/ C$ v+ X
- da(g);
7 f" K: q6 Y8 I# e8 B& R) M* t& G - let kk = smooth(1, k);//平滑切换透明度# b" D0 F/ w1 D% d9 H
- setComp(g, kk);
* F( w: R4 R3 h0 w0 K! R4 {+ o - db(g);/ @8 y/ C% B8 D, s* Z d
- t.upload();: T( t- \2 B% B1 Y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- v/ [$ ?. _; G" q2 V/ l - ctx.setDebugInfo("k", k);0 L3 m2 V z4 y; J- \- y
- ctx.setDebugInfo("sm", kk);. [& Q4 l7 |' k1 J$ n1 t
- rt = Date.now() - ti;5 R! [7 c8 m! W0 j7 j9 M
- Thread.sleep(ck(rt - 1000 / fps));3 N, V! ^7 }2 |% _3 J% q
- ctx.setDebugInfo("error", 0)
* y2 f, u% K- O' p1 @ - } catch (e) {. P, i1 ^; K, Y
- ctx.setDebugInfo("error", e);
3 S# `* ^0 h3 \) p; W - }' I6 N4 v& U. j1 ]8 ?, ^
- }% c$ f/ [+ Z) Z" p- f: V3 D
- print("Thread end:" + id);
% a& Q- I+ Q* i `# m/ y5 M - }/ g! r1 s. I) L9 X7 t" ^' m
- let th = new Thread(run, "qiehuan");6 S, w" E4 _ |. V
- th.start();/ C" F3 J, |4 M# R6 g! E
- }4 p7 w$ u) F4 {, ?# O$ Y
) M/ a5 V$ j$ b3 ]- function render(ctx, state, entity) {* g ^7 B9 B X2 M g& A
- state.f.tick();
' S6 L# I X4 q, ]& W( e2 b+ @& Z. p+ b1 C - }
/ k% a$ g( e k( {
6 x% Q+ P( N- f- function dispose(ctx, state, entity) {
; \- d) u8 U" Y/ I - print("Dispose");
" F& X( x+ S: U5 u( j) C9 F - state.running = false;
, c' e( y* f' O' n; H# A. | - state.f.close();9 b8 Y6 U& n$ @2 b
- }
1 E$ Z9 m8 r5 J( n# T - % n" [! X0 Y4 U; Z/ ?: ^
- function setComp(g, value) {
% k9 a0 t5 Y$ `9 J' ]# z - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 ?0 t! P& V+ o( l& i* W4 {2 j H3 | - }
复制代码 * v; i: X, o* 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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, g% L! `! ]6 h( k/ G+ {顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 t+ |! _7 W! |& h& F/ D& {8 j% U1 K
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