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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。6 Y* i% v# D c7 o8 M0 x3 [: e @
- importPackage (java.lang);
% O: w7 y5 i: ~5 ~" e3 H - importPackage (java.awt);3 _- A" Z8 Y6 g5 U5 L4 z! n2 o2 a
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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3 p, M- n: |: [. h" i- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 J d1 u: H y. C: ^8 g6 ^( x" v! t
- 4 x, m. {5 b( D9 o. v& f
- function getW(str, font) {
. k/ A' P2 ` X- A2 g - let frc = Resources.getFontRenderContext();
6 Y! s4 y [: Q, a+ I+ Y - bounds = font.getStringBounds(str, frc);# [. ~/ U$ f2 D2 W& Q' c4 [
- return Math.ceil(bounds.getWidth());9 N2 c: k! k( b9 c- P7 a
- }
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- da = (g) => {//底图绘制) c" R) J' c; a3 m% U
- g.setColor(Color.BLACK);# Q% ?7 B7 B1 k! A, t: w
- g.fillRect(0, 0, 400, 400); l" g1 P' e% A
- }$ \% `# `5 H/ m3 d! o
* K+ U: w, C" q& ]- db = (g) => {//上层绘制
- W/ C3 A4 J9 V - g.setColor(Color.WHITE);
( I# t& l; k/ h5 S* L Z' U - g.fillRect(0, 0, 400, 400);5 ~3 {+ S; U b$ F @
- g.setColor(Color.RED);
6 ]9 a, l; X# I' | T& f - g.setFont(font0);3 A5 k9 Z. v, n, C8 s
- let str = "晴纱是男娘";
( _$ c" o% F. f; O* ?2 A5 U0 M) n - let ww = 400;
; } k. ~1 W) M) d: ~ - let w = getW(str, font0);
! v. Y y+ q. k5 Q* k - g.drawString(str, ww / 2 - w / 2, 200);
& Z# M5 H) R# M D - }
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3 e# X: M ~) [( |& E D- J- const mat = new Matrices();
5 w, G) a3 j8 L* g - mat.translate(0, 0.5, 0);# [2 R& ?( A M/ N6 {7 h# S
- 6 Z1 t! ?( B/ O- v: Y
- function create(ctx, state, entity) {5 n9 }6 V& }. s8 ]9 Y0 ?/ c
- let info = {
9 n. v: H; ^9 { G - ctx: ctx,+ I E3 V. K% c3 o. l% A4 k$ b! _1 D
- isTrain: false,
; o' {0 p* Q& O- x4 n# A! Y4 R - matrices: [mat],* S! }# N; P3 [
- texture: [400, 400],
; e5 `0 `% o7 u2 m; p% O - model: {# \- }& x! {, F/ ~" v. i) |& y
- renderType: "light",- I9 [9 Z* k' S# U- j
- size: [1, 1],
* J/ P* N( w4 Q( { - uvSize: [1, 1]
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- }* e; k7 R" F/ ^0 ]& M$ J' Y$ k+ E. i
- let f = new Face(info);( d! @# c9 x; l1 Y7 m( t7 ~3 F0 n3 a
- state.f = f;9 a& A1 A% W$ q. @2 X& n$ ^
R- |8 r% o/ t3 l2 m- o( ?1 X- let t = f.texture;
7 R2 D( j. W3 k5 F" i/ y - let g = t.graphics;8 D$ a: |4 e0 R$ \
- state.running = true;+ G5 Z% \1 y) u m% J, t) G1 D9 p7 U
- let fps = 24;7 c6 K9 [) ~! Q
- da(g);//绘制底图! [8 @+ i: R5 p% X2 Z8 E
- t.upload();' d7 U9 h% @ A. l1 k9 J2 N) w
- let k = 0;/ O+ d4 v* ?) U% K9 Z( w7 u
- let ti = Date.now();" H! } S* Z) b+ J" O. a9 V. q
- let rt = 0;
- y; ?0 O2 @) [ - smooth = (k, v) => {// 平滑变化6 n" z; m6 I, a0 L( c! J
- if (v > k) return k;) a6 R$ i6 |% T
- if (k < 0) return 0;
2 S* d- k; r" ~2 j- P; D - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! }% m3 Z4 w$ v! S3 G1 i
- }
% F R8 f7 L/ q+ L - run = () => {// 新线程
' x& j: V7 O7 q4 }& l" S - let id = Thread.currentThread().getId();
5 ?% Y" ]5 X) L( n- ^ - print("Thread start:" + id);3 P2 g# E: j8 ?* ]# i/ m
- while (state.running) {- ^; a# L5 X( y/ y6 }
- try {: b" K4 l! |/ c% t
- k += (Date.now() - ti) / 1000 * 0.2;; B# j+ `6 l/ ]) F
- ti = Date.now();
: b) J' O' N! g& d9 X - if (k > 1.5) {/ k( {) h* j3 U6 D: P% d: Z
- k = 0;! x, m' g+ T& S6 M2 ?* D
- }: C$ c9 d" k2 F1 f" [7 P. D9 Z
- setComp(g, 1);3 f6 W" h" j( f2 d5 P6 v9 x
- da(g);" Y8 |* ~. f# K! C" [# @, }( A
- let kk = smooth(1, k);//平滑切换透明度- T7 Z: A2 U* B) m: _4 s
- setComp(g, kk);
& R/ b7 p( u# B5 G( I6 o" ? - db(g);" r z: Y6 n0 C w, Q7 i) }! h
- t.upload();3 x' \/ y M9 t, r+ b
- ctx.setDebugInfo("rt" ,Date.now() - ti);
* P7 M0 C6 @/ Z& h - ctx.setDebugInfo("k", k);) S% ^% ~* w3 N2 s
- ctx.setDebugInfo("sm", kk); G8 T, O* U# X1 F% A5 V) C. W
- rt = Date.now() - ti;$ y) b( |0 N6 y2 `% m7 ^3 |; U" Q, w
- Thread.sleep(ck(rt - 1000 / fps));
, l4 j6 ?. i# H" I( _5 m( x1 J- E - ctx.setDebugInfo("error", 0)
) p \$ f( k9 P, y7 N+ E3 g, o# L - } catch (e) {( V) q, b3 ]; X8 W1 _- {! \/ C H
- ctx.setDebugInfo("error", e);6 t# e j& x9 P$ x0 D" d
- }" D5 M" ~1 m& A% i7 p* a+ f9 d
- }
3 a6 ?3 Z( N: r& Y3 \8 B - print("Thread end:" + id);
0 h, P. y9 d2 n- q4 ` O# W- W - }! g _9 m# y; d) _! Q
- let th = new Thread(run, "qiehuan");
! l$ A a* C* n, J4 T' Y& `$ t4 V - th.start();
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- 3 ^. j+ y2 T% m. F
- function render(ctx, state, entity) {
5 Q, I+ K# k4 \0 @2 X% V% \' b - state.f.tick();( h) B, M0 [) T$ {6 d) h
- }
# ]: Z2 d! |7 y0 J0 N* m - ) M! H2 u1 Q* I% m6 \+ }# t
- function dispose(ctx, state, entity) {4 Z, ]; K% A( S) l
- print("Dispose");) C6 Q/ F- M0 V# R1 G5 c) O2 O
- state.running = false;
$ L: W$ n4 @/ C# E* I - state.f.close();% p g- O5 y) u
- }2 C; f- w C& L( k/ y* O
! c& Q r' I% V3 h7 o% g/ i2 P- function setComp(g, value) {
, d; O. I% W4 k& ]0 J- ]0 I - g.setComposite(AlphaComposite.SrcOver.derive(value));* a7 w/ |1 K, W P7 ]+ l& A
- }
复制代码
1 @, S# ~5 a6 J9 k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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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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