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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。- A; O- e. |0 j0 ?
- importPackage (java.lang);- _8 Z7 v: ~% [7 _3 D# d3 Y
- importPackage (java.awt);& U2 \4 ^- m6 @8 d/ I
- ( B4 v+ s3 _# b H/ `8 `! t) A
- include(Resources.id("mtrsteamloco:library/code/face.js"));3 S9 {7 C' |, S* F* ~
! @$ b- o. ~ J. z8 r7 I. a6 W- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {* R$ p3 {' x3 K& A, O8 m1 x
- let frc = Resources.getFontRenderContext();" e7 u( s) _4 Z3 z
- bounds = font.getStringBounds(str, frc);+ j% A, o. a3 G
- return Math.ceil(bounds.getWidth());
- g. D; R, j$ U( q/ Q - }. o C- J- G0 G
- 0 K& w. X1 T) d& e. O
- da = (g) => {//底图绘制
5 V5 [7 d& E i+ K( t - g.setColor(Color.BLACK);
5 t- K3 A( v# s& J! n - g.fillRect(0, 0, 400, 400);
! a( p$ s! _/ f- H - }8 {1 q \& A5 G" D& d0 O! j
+ _1 y& B3 y$ }" [. u- c! e- db = (g) => {//上层绘制
) m" }, g7 ^4 D P, } - g.setColor(Color.WHITE);
* d1 @2 `' G9 x! q - g.fillRect(0, 0, 400, 400);
3 u0 {( V- u0 T) O - g.setColor(Color.RED);
, J5 t7 Z! N5 \! ~; d - g.setFont(font0);# B$ k8 O+ O+ g/ v/ [% N& C; H. k9 H
- let str = "晴纱是男娘"; ]! T3 D8 X6 J( p; s
- let ww = 400;* w# q/ S2 I4 d1 g, H8 ? E
- let w = getW(str, font0);; i8 f& V) v* S2 T( M+ X# I
- g.drawString(str, ww / 2 - w / 2, 200);
/ ]; n! K3 o6 \. Z8 ~ - }
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- const mat = new Matrices();
1 P1 T' s+ E) v4 Y0 | I+ F - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {( F1 j1 u% Q! G: t& y1 G
- let info = {/ p+ x. X/ h0 L1 d# U& [9 Z
- ctx: ctx,
/ L; O+ S1 ?+ t, O* {8 w0 n - isTrain: false,
+ r9 t9 Z! S% l* g - matrices: [mat],
& W# j/ E3 i7 i - texture: [400, 400],) L8 N, S9 i" T: b- P0 {8 o; M9 k* i
- model: {
8 o2 ~/ E3 R$ B9 e' W! `; [ - renderType: "light",
?4 b! c% b0 v# E3 b - size: [1, 1],
1 M" M( c: b# j! C" p - uvSize: [1, 1]6 }1 d; i/ V0 `& {: Y
- }
/ f( S& v5 u! q0 [$ W, Z - }
: w, D9 E7 \* |5 Y7 P. L - let f = new Face(info);1 S) T9 H w' K3 h: L3 A
- state.f = f;
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- let t = f.texture;7 f7 i6 }$ F$ A# g+ b7 r
- let g = t.graphics;3 p& }3 y. Z7 c2 d+ Z
- state.running = true;3 ]! L% _$ ^+ U4 M6 P( j9 V5 R' W' W
- let fps = 24;
6 @7 Y; R( ]0 }, N$ G% C% B - da(g);//绘制底图
H6 n, c6 u/ I - t.upload();
" @ n, W9 Z- E2 r- G0 f) K/ y - let k = 0;9 o E3 ?8 d- \+ e7 }, w
- let ti = Date.now();. L( p! Z, R4 e
- let rt = 0;9 v* q: w$ s8 j: ~4 G5 Z: H
- smooth = (k, v) => {// 平滑变化3 ~* G, v; [4 g' X7 M6 f9 R! \
- if (v > k) return k;
5 G3 h) Z# _( G5 j2 c; V& P - if (k < 0) return 0;
9 Z. Q' T. M, J% }: U4 E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 H! m( I' ^: g2 L/ z
- }
6 d( Z7 f. |& U6 Q1 u- y$ U - run = () => {// 新线程) a- m& J5 C7 E5 [- V4 ^3 P
- let id = Thread.currentThread().getId();
- `' T( Z+ e0 s/ N" p - print("Thread start:" + id);
# D4 e: d9 R! D; g9 D) q: x - while (state.running) { ]6 _ n9 a0 o6 G
- try {
- ^4 C8 a, D% }' u7 S# Q - k += (Date.now() - ti) / 1000 * 0.2;' ~/ r I: ~8 J' b7 f
- ti = Date.now();
$ n6 _+ ]- J0 }; w - if (k > 1.5) {
6 ?# v, P- V( R7 q7 v - k = 0;
+ e& r4 j9 ~3 E9 I - }# N: O$ Z% j* X# n+ m: h) v! P
- setComp(g, 1);
5 }9 ~! S6 U" }, o$ ^9 {% J - da(g);
$ g. B' p$ `( q0 m& H9 m5 J - let kk = smooth(1, k);//平滑切换透明度
+ o5 H3 G T8 F* @3 E# Q( G1 H2 y$ ` - setComp(g, kk);' i* r$ Y' a x* r9 `
- db(g);
V- P. }, B( K0 a6 n - t.upload();
4 g9 S: X8 B- l/ L - ctx.setDebugInfo("rt" ,Date.now() - ti);% ~' u6 q8 h' l0 T- M. L6 E
- ctx.setDebugInfo("k", k);
Z% ?# Q1 p$ k2 |1 ^8 ~ - ctx.setDebugInfo("sm", kk);0 z2 }7 @( @" P. {& y& Z, [) `! M& v
- rt = Date.now() - ti;
- x& ]1 E" ~4 Y$ e - Thread.sleep(ck(rt - 1000 / fps));
: B9 }* i1 N9 E9 z' o: u+ x - ctx.setDebugInfo("error", 0)
5 V+ T! S5 p% z; p& g" Y- a - } catch (e) { D2 @9 n8 D2 I; @4 ~2 m2 N( @
- ctx.setDebugInfo("error", e);2 q% n1 S; l- d w5 l
- }
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- print("Thread end:" + id);
' S. w/ o8 g8 g* a - }
9 ~# Q+ X: R4 Q - let th = new Thread(run, "qiehuan");: C* V& X& _! ~. P7 A3 J3 B
- th.start();
& m5 Y( \2 m! s - }
4 @( _4 b, _. H% A3 y3 `9 E6 m
4 h4 b# U* _. @) \" c: ^* V- function render(ctx, state, entity) {
, ~+ Z7 g4 m( d' F8 W - state.f.tick();# E# n3 e+ Y! w7 p7 b. @
- }
7 {# K* M) f9 p, X1 U - 6 e7 }$ T }( b0 P& o5 d6 P
- function dispose(ctx, state, entity) {
1 t0 i9 Z2 F: L& C - print("Dispose");. R3 Z. @! {" L- m3 E `
- state.running = false;" v9 s e% d6 o; e
- state.f.close(); G: c0 U" A" a8 R1 V5 A+ R
- }3 U v6 R( B0 _8 v; D' ]1 l
- # y+ H, S8 p* ^. ^
- function setComp(g, value) {
( E4 `( M- t- S - g.setComposite(AlphaComposite.SrcOver.derive(value));
- k, Z9 ]9 \ b, @. Z7 D - }
复制代码 ! n% c: K5 }% e" U( `
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。3 ?( {& }$ {% w8 D8 F+ A2 s
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1 z, r; r- j1 S. W* {顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)& y; z' E. A9 f8 |6 H
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