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* L: Y+ c5 `8 r6 M$ `! ?4 t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。
, \/ V2 s1 o8 M0 I6 ?* `% |- importPackage (java.lang);
/ d8 x! E1 Q( J) Z - importPackage (java.awt);
* \! [4 |4 M7 N+ G0 p O; t/ S0 R
: L! g4 @# e+ O8 Q8 N( `- include(Resources.id("mtrsteamloco:library/code/face.js"));9 t% P! k" W; R* c) J1 R; ~% ]
- , \; C# s7 D2 y8 A
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
6 R$ a/ H) Z! y# v8 T7 o - 6 y' i- h) X J! N$ k
- function getW(str, font) {% ~8 L2 I4 Q3 Y* N* |
- let frc = Resources.getFontRenderContext();- a% L$ U: o2 j) i3 l
- bounds = font.getStringBounds(str, frc);
7 ?5 j* m n; o c; C - return Math.ceil(bounds.getWidth());$ |3 a. G- t+ R7 E0 }% l
- }
: W* s9 h5 ?8 [, k0 k" b- i
1 ]8 U: O1 Z& X8 n7 t- da = (g) => {//底图绘制 b4 m( J9 B8 a+ a0 H
- g.setColor(Color.BLACK);
. t- f. ?% S+ j8 A5 n, `6 ~) ] - g.fillRect(0, 0, 400, 400);
) \- o* D+ _ t2 ~+ V - }
: L; R9 F/ f0 w& m& x
' q" U+ o0 @$ X' Y+ b9 Y+ Y- db = (g) => {//上层绘制
' K# y: W. t9 n# ] - g.setColor(Color.WHITE);
7 ^2 l* x; Z: D8 N6 x E) K - g.fillRect(0, 0, 400, 400);
% J& a' O# i9 {5 W( d - g.setColor(Color.RED);! d+ D/ f7 ?# M. D4 b% T) }
- g.setFont(font0);0 `4 ?" }( x1 _3 v1 z
- let str = "晴纱是男娘";# D/ X# M# R _$ m! r8 E
- let ww = 400;% g1 U5 C! x, J5 i; m) R$ U/ t# |" ]
- let w = getW(str, font0);
) A6 `1 t' E3 b- T Y1 u - g.drawString(str, ww / 2 - w / 2, 200);, {! X% `1 K" T
- }" S& n' A6 Z" ?# k4 o
2 G" Y! X; v$ E; H- const mat = new Matrices();
; A: }) |9 R# C3 L+ a6 U0 ^ - mat.translate(0, 0.5, 0);
% K; o, m) s+ B B k5 M& F
7 D7 _3 c% c. ?+ L% q8 A- function create(ctx, state, entity) {
% x. q1 T( a/ w8 g6 F Y - let info = {
* b. d$ ]1 M( Z - ctx: ctx,* F/ M9 j4 m0 a$ d( c
- isTrain: false,1 L$ r+ H% d& w& I( Q% h& J
- matrices: [mat],
0 w+ |0 W1 R, G% `5 E - texture: [400, 400],
|6 y0 c) }/ T- U& t1 C3 W; f - model: {
- K8 }* f$ X& z9 J+ ^ - renderType: "light",
; k* I3 t+ d$ B: R; V - size: [1, 1],2 O9 D& _% W8 V
- uvSize: [1, 1]/ r8 I; K# K& D* ]3 p
- }) ^* H* J7 O( F: {6 }
- }+ t0 r( q8 D8 w6 x8 x7 m( o3 x8 N
- let f = new Face(info);
/ |) `' ], f9 E5 [9 V6 b - state.f = f;
: y, r$ _& T8 O2 M+ r
* T' u$ d4 W7 l- let t = f.texture;* b9 ?2 ^; e2 x/ B! N1 y
- let g = t.graphics;
5 T! r1 z8 I. _, [4 C - state.running = true;6 j" T5 m$ u2 c# R2 v" u
- let fps = 24;
8 B+ x- k2 F( i - da(g);//绘制底图& f- S) C1 Y# C8 ~ U5 S
- t.upload();% ` B$ a$ v1 E* W8 W$ k
- let k = 0;
. t/ Z/ j: U6 j: R9 m - let ti = Date.now(); K$ P' j! C! ]$ k/ V; q& H5 w
- let rt = 0;0 ?# E. A3 ]4 J! g- `/ W, q/ p% `
- smooth = (k, v) => {// 平滑变化+ Q0 \+ S; h% D! y6 z; X
- if (v > k) return k;1 G4 O6 o% G% w7 O
- if (k < 0) return 0;5 n' x/ \: ]+ C9 v1 N" u* N
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- ]. ~ _* M6 k$ \ - }
2 M8 P, V3 M3 I! d) v3 D( }1 d - run = () => {// 新线程
2 o% n/ V- B* O7 ?8 b - let id = Thread.currentThread().getId();8 [: I* B7 c+ p+ p. _7 l4 ^) ^
- print("Thread start:" + id);" C8 C6 H$ Z; b, ^+ C; E
- while (state.running) {
$ T' [7 J3 q+ y& O - try {+ }# a( W! J" [3 ]" N9 c
- k += (Date.now() - ti) / 1000 * 0.2;
; _: a: r* @* r4 m( M1 b4 s - ti = Date.now();
0 | ^+ t6 f' [$ N/ Y' G- K - if (k > 1.5) {
+ T3 a% U6 G; e$ j% e6 t9 F! A+ Q - k = 0;
# X: Q. O% L& f, v0 @. C7 y - }
9 Y) R2 B( ^, w - setComp(g, 1);
% Q N8 N4 }, R! i6 f - da(g);
+ h$ g; N$ e8 J5 p+ U6 Z - let kk = smooth(1, k);//平滑切换透明度
- t G7 X0 j, V% z- x - setComp(g, kk);
. a E, @' o0 Y/ [) }2 ^# | - db(g);' ^1 r) t" x w
- t.upload();
3 Y$ I9 f- [6 A - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 y- B# X4 p- i/ J5 ` R# W% q - ctx.setDebugInfo("k", k);
! A% D4 t m d' S u' m X; ?: V - ctx.setDebugInfo("sm", kk);7 b: n5 g, t8 S* r0 M
- rt = Date.now() - ti;
5 \& R+ e, k) p# ^* |& U7 x& B v - Thread.sleep(ck(rt - 1000 / fps));3 X! Q; m: h9 t, s, |% i
- ctx.setDebugInfo("error", 0)* a- o7 \3 ^* T' b( r# `6 D
- } catch (e) {
; T5 u+ [: w* A8 t0 K9 ]3 O+ w' n$ Z - ctx.setDebugInfo("error", e);% K: x _, O! a# F6 S+ {/ P2 u2 m
- }
; E% h- ~7 `5 t8 l- J - }
4 d. C- N9 s9 Y7 |- f% U' @2 N - print("Thread end:" + id);
2 @$ p1 \3 \( V; [! T% O% ~$ Q# f$ | - }
! `7 f9 L/ g$ x. J( k - let th = new Thread(run, "qiehuan");# P4 L, s, N9 R/ f. O/ O( R
- th.start();
* V! U/ v) ]3 M6 q: C a: ?* e - }
2 t" p! i( a+ y3 q* q - 1 ]5 _/ F* W8 t& S' y0 N D$ |
- function render(ctx, state, entity) {
* Z5 S% g2 J* s& A/ u - state.f.tick();. r% Y7 O! N1 V& Z' P8 p$ s
- }
% u6 W2 s1 I% [5 I8 i% `6 y - 8 ?( I9 R- Y+ P# t
- function dispose(ctx, state, entity) {
9 s% q( v; G0 B6 B+ x, T) k) P - print("Dispose");
# G2 O3 Z7 p+ |2 X Y - state.running = false;
4 [3 ]& J2 H0 f+ P& p" C N" m - state.f.close();. E7 S- ^4 N( Y7 ~7 }# J2 o |
- }' }: B+ o. l* Q$ O2 k0 v5 ?
- 6 v3 [6 _& l. D; T; d1 A; f1 i
- function setComp(g, value) {
2 g0 j( M a% y6 y - g.setComposite(AlphaComposite.SrcOver.derive(value));* E3 c4 a1 B5 g ?
- }
复制代码 . N0 m! L, f& S& I
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。" o6 r0 [; w* t7 c F0 m
" ^: _: ?$ V9 P, C0 \0 g( \: U2 s6 U. r" ^' p8 `& y& Q* 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). }$ d# K: x E# l! v; ~. t" h- `
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