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+ R2 Z% Y- {( k# Z' P2 |: X 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。
; O) e: Y: A. U/ |8 @/ Y J7 K7 p- importPackage (java.lang);
7 k$ O# P) }# D* X - importPackage (java.awt);
3 _/ V. a" Q) l6 t% e7 Z) U
3 M( L+ e- v @3 A2 L8 a! t. J( o- include(Resources.id("mtrsteamloco:library/code/face.js"));
# [6 ~, _ T' Q - $ w4 @, @4 j$ h
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( ]& w7 `- J2 v1 k+ p9 u% _
6 R7 M; F# c9 d" e5 j+ R1 Y+ @( u- function getW(str, font) {
, _" x) I7 B# A' u/ | - let frc = Resources.getFontRenderContext();, b7 Q( u# o( U8 s% ]) u
- bounds = font.getStringBounds(str, frc);; j) y- q% G' t" F( f7 G( t5 t6 g
- return Math.ceil(bounds.getWidth());
" a+ _+ X$ h3 l2 \0 a/ m6 ` - }
4 q+ t" e' r* ^: u& o4 {# c G0 } - 9 |$ V4 Z) R% F2 F; ^. P: _* I# s
- da = (g) => {//底图绘制
* o- M( k. Z8 K) ? - g.setColor(Color.BLACK);3 v7 ^+ p$ y0 f; P& y/ P) \5 Q
- g.fillRect(0, 0, 400, 400);
) L1 Z/ ~+ ?# l1 b# g! f k4 c5 z8 ^4 p - }
; K5 |4 [4 ]% [* ` - 1 d8 L1 _9 L- [+ o5 U4 a0 r
- db = (g) => {//上层绘制- h8 A6 D; G) V0 A
- g.setColor(Color.WHITE);# d% u3 _3 q' K8 z0 `
- g.fillRect(0, 0, 400, 400);* p& }' X/ Y2 V2 G# p
- g.setColor(Color.RED);2 d% \) `8 \" F1 P' j4 h+ p( x$ q
- g.setFont(font0);
) a+ Q! ]) h* o5 m- T8 z) S - let str = "晴纱是男娘";
; l- F# e0 u' R# k" m - let ww = 400;
6 X) ?# N% k; K6 i - let w = getW(str, font0); c& T8 C" _, Z
- g.drawString(str, ww / 2 - w / 2, 200);0 O7 V7 N2 E" J" V/ Q! Q
- }
4 M* [# A$ {$ v% i
( t; z, l8 [ |: R c9 O" `- const mat = new Matrices();+ s' C0 i' \& B7 J/ h) D
- mat.translate(0, 0.5, 0);
1 w( t2 I, c8 ]
7 h& Z- w3 ?7 Y% k1 n A7 I- function create(ctx, state, entity) {
" v9 s, b) F2 ~ - let info = {
5 ~- k0 Z: d8 i0 W; t- |$ V; K4 n+ ] - ctx: ctx,
: Z/ u9 Y4 C, H; G* \6 X - isTrain: false,
( p8 u$ w8 K% G9 b( Q5 Z - matrices: [mat],
# h+ _6 m- M# J% f- }0 H - texture: [400, 400],
- \' v+ \2 q7 E - model: {) _. B: |8 g/ {1 P
- renderType: "light",, x8 b7 t! j, N( P7 R
- size: [1, 1],
6 Y0 @4 A% a% z2 Q6 C" _ - uvSize: [1, 1]4 i& d2 l ^* I& W( `
- }
) Y- j4 ~3 c0 \. V - }
% f( l& V/ F3 j9 A0 B$ L) W - let f = new Face(info);$ k% p- }! f& M! n4 z) C
- state.f = f;9 T$ F/ ?5 R& ?5 a- H
, l4 c% M0 q6 c2 u3 J3 v- let t = f.texture;
* u5 n% Z; J& F9 ]9 [( p - let g = t.graphics; j& I/ r( C ?/ m8 P- `/ v
- state.running = true;+ o, x2 m; w! W3 ^- R) A* H# {$ q
- let fps = 24;
" W& l" N7 w2 ?# d - da(g);//绘制底图
; W* |# L8 F/ y1 d) G9 G) u1 T. _ - t.upload();
( P7 t$ `$ A7 r' { - let k = 0;. z+ d( U+ a, s _" C5 O" @* P* o6 x
- let ti = Date.now();' S' |' q/ B- T' w2 w1 M
- let rt = 0;. Z+ z: S0 F5 [
- smooth = (k, v) => {// 平滑变化) m+ b9 s+ O* J x" t" t) W
- if (v > k) return k;
$ Y6 S2 M" r5 _4 M* `- `! Z - if (k < 0) return 0;5 a h! r! _ A9 O f. j
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 d# q v2 N$ v* e4 {8 a
- }
$ O0 i2 Y- n) v4 `/ v$ Y6 S - run = () => {// 新线程9 H0 }! G6 H7 W) a- q. Q5 p
- let id = Thread.currentThread().getId();5 }) T, {( S" E# p3 J" E( D, {9 V: Y
- print("Thread start:" + id);
' m: q' }- ]4 Q* w9 |6 ^0 D - while (state.running) {
' [, g; `8 r7 p$ `4 v. X. ~: ^ - try {" z6 ?! x: _" ?# p0 W
- k += (Date.now() - ti) / 1000 * 0.2;0 m2 O: ^/ l1 [$ B6 a
- ti = Date.now();' S0 H. r/ x, I: S" R) Q+ ]3 E* S
- if (k > 1.5) {
+ u5 C$ b& J/ S6 n" J - k = 0;
: R+ V. B2 l& ? - }* H" k4 H7 t' h3 Q' I3 O
- setComp(g, 1);, |/ z" @2 s* [! h" S. T6 ~, R
- da(g);4 u( v. Z1 o; [6 x- y$ h
- let kk = smooth(1, k);//平滑切换透明度1 o: S: l: ~ L {. ]7 y& v
- setComp(g, kk);
% R: }$ W0 X# s1 M - db(g);, O5 y6 X) L0 U c) F. p0 [
- t.upload();
, i7 j: c) Z$ K0 p- x( w; N4 _ - ctx.setDebugInfo("rt" ,Date.now() - ti);0 E# E$ r' o, S$ ~/ B
- ctx.setDebugInfo("k", k);& a5 O( y' Z5 d' q+ N
- ctx.setDebugInfo("sm", kk);) E! J C4 p# K+ Q1 M
- rt = Date.now() - ti;
6 V; }1 k, G/ u' ?' ]1 k - Thread.sleep(ck(rt - 1000 / fps));
! `6 s! ?+ A& \8 Y& H+ @ - ctx.setDebugInfo("error", 0)+ z' G3 C3 B3 W- _; b' X# ^, Q
- } catch (e) {
3 [8 F/ C2 z; G2 x& w- v - ctx.setDebugInfo("error", e);6 m( [/ F; U1 W& j0 V
- }
3 D5 R2 U7 _1 n - }
$ O3 ?, w, O: D Z - print("Thread end:" + id);
. y7 E5 k3 O% D" ]3 _8 x - }
- Y! L+ T7 Q. S! l - let th = new Thread(run, "qiehuan");
" `% @* U8 j/ S; B - th.start();! K0 e+ B* N' i0 ]" o8 r" v# P
- }7 T* G! p6 Z7 x; o( n f
- 9 ]& f+ _# b. e# r/ j' B6 ]+ x
- function render(ctx, state, entity) {
; o q- x) B5 Q) [0 d9 O8 v - state.f.tick();
/ b) ^- ~4 J1 I% M - } p( V7 I+ D; Q4 b/ ]( w
" ?9 _; W! _+ i- n/ }- function dispose(ctx, state, entity) {
1 a- f, r* y% F7 K$ J4 O$ ] - print("Dispose"); Y; R% E# c6 F( x7 y3 c
- state.running = false;: @' s, C; M# T6 B) t& g
- state.f.close();: l V$ g; A7 H; X9 j
- }$ P: H3 F- @& d0 d0 J& ^
- % S% {. n+ a% I
- function setComp(g, value) {6 u: K( m5 A3 f* z, m
- g.setComposite(AlphaComposite.SrcOver.derive(value));0 O2 W; [$ ^7 v6 v: n6 k9 V
- }
复制代码
a7 O5 z; T$ m" r" R+ w q: l$ H& |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。
* X d! f0 u5 Q4 `0 V2 B/ n& k6 L3 J, s& V M' K" P& s
' v9 h% z' c% y( T2 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)
+ C$ m$ k) G- Y" j* v |
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