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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。
' v, t2 U* c# E$ o0 b6 L+ U- importPackage (java.lang);7 r ?* n. R/ c/ I) e. Z
- importPackage (java.awt);
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E$ a* E( e# _. |+ p* K- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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+ F2 U; x2 R+ u5 l- function getW(str, font) {+ G9 w s# B- d6 Z$ G8 O) V
- let frc = Resources.getFontRenderContext();) n# b/ o! j' ]4 }# u
- bounds = font.getStringBounds(str, frc);' W+ F/ k; g" ~- ]# w5 X8 W
- return Math.ceil(bounds.getWidth());6 E; I/ n" N) N6 \
- }
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- da = (g) => {//底图绘制7 c: F7 e" h7 h6 W. f v1 @
- g.setColor(Color.BLACK);
3 [: m2 @5 a0 I& B6 Q - g.fillRect(0, 0, 400, 400);3 f/ m: w" x# n( u/ {
- }4 m1 B# b3 J4 p$ U! q
- 2 U/ W/ t! z# o- F
- db = (g) => {//上层绘制7 d( i2 K# w9 Y! x7 C) B# L3 h
- g.setColor(Color.WHITE);
- _$ o+ d% f( `% b- ]. @% y! J: y - g.fillRect(0, 0, 400, 400);
+ X z" @% X/ @+ s0 w: N. }* f - g.setColor(Color.RED);1 S0 @( U; w- Y7 v: x
- g.setFont(font0);5 A+ |% o9 I! _% L1 x
- let str = "晴纱是男娘";! B1 I# f4 v$ x6 T
- let ww = 400;
- u0 H3 k9 y1 t4 c/ {5 h3 W( V: v - let w = getW(str, font0);& o! q+ {: e k3 a8 ~# h( V5 ~
- g.drawString(str, ww / 2 - w / 2, 200);
2 o2 u0 ]2 ?# L& G% | - }
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! J" @. u2 C& W3 Z) ]5 \- const mat = new Matrices();
' l* p7 g9 ~; |- t0 W - mat.translate(0, 0.5, 0);
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- J9 C4 T" V5 f- function create(ctx, state, entity) {$ C% x5 @ D' Z
- let info = {
3 ^ B/ u C) A( F1 s - ctx: ctx,. f8 l# j( [1 P% P3 S# T, h
- isTrain: false,9 f! I: z* f2 f7 O) Q" u5 l7 J' y3 _
- matrices: [mat],
2 H( ^% i0 B: [( w( [; v - texture: [400, 400],% S/ D1 H* {" g
- model: {1 a$ S9 s% w+ i' I( [; l
- renderType: "light",
% o& F) J+ y1 d/ l - size: [1, 1],
2 u' _0 {1 ]$ @2 k' x2 U% q/ e - uvSize: [1, 1]+ @& u0 \& E* V4 x7 s
- }
+ n8 _* ~. j6 O0 c; x/ U m0 S# U - }
! V0 Z+ z" X, y6 L - let f = new Face(info);9 `3 M: s4 h5 E7 K6 e( G
- state.f = f;1 I+ a( k) P% _+ v; ~3 Z
4 W; a& {7 {% F+ B$ B- let t = f.texture;
2 d2 q$ M1 F. b( s5 L3 G8 {/ o' i - let g = t.graphics;
( S+ ]9 L: x% K1 d - state.running = true;
8 I$ Y+ N( f. E7 k7 V1 {4 [( R8 }2 R - let fps = 24;/ J4 ~- j) [( }& p
- da(g);//绘制底图+ x4 C! s! ^8 s L ]
- t.upload();
$ t# z. a: d/ g& f - let k = 0;
" B) V- L% r: s8 `# E7 B) @ - let ti = Date.now();2 y4 M3 }$ \0 a* d& |
- let rt = 0;. _7 [; J$ b, c2 B7 K* h' F! `; g
- smooth = (k, v) => {// 平滑变化& k# I3 C' c) `: y" W
- if (v > k) return k;
: n, W+ @$ ?6 u$ @2 f - if (k < 0) return 0;1 T6 d$ A- v* K% N, \
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( P: U0 |2 }# `/ w) B. l h0 e; Q
- }
. D" o, P d* R: q - run = () => {// 新线程# j. @7 M: R5 u) g4 k/ A i
- let id = Thread.currentThread().getId();3 d/ ~- R0 c6 p+ {1 h3 V% e$ A
- print("Thread start:" + id);6 I4 p1 J! Y( u0 d( ?
- while (state.running) {8 J& A1 |: Z2 n* {0 E7 ]+ b* K
- try {: H6 u8 r1 j4 g5 u" Q3 t
- k += (Date.now() - ti) / 1000 * 0.2;, g- p7 q+ D8 ~! ?4 w
- ti = Date.now();
8 s7 w' E1 E: J: h) {( U - if (k > 1.5) {
) b3 N& t5 L3 h; v! j! c4 Q - k = 0; G. d+ U; _! ^. l# k
- }! r0 P& k6 C/ T" j5 V, ^' }2 q. z
- setComp(g, 1);
" q$ g. X& `8 S, H( U+ i1 ` - da(g);
* S- h6 C8 U4 l+ F( Z6 O0 ~( |+ Q - let kk = smooth(1, k);//平滑切换透明度7 ^; g; O! C" P
- setComp(g, kk);( M2 N0 y7 H' H d+ e0 s6 w
- db(g);
$ U9 ]( T7 {- R) z. R, p3 A - t.upload();
! [% n7 y7 c' { - ctx.setDebugInfo("rt" ,Date.now() - ti);: `: b0 J* `9 `9 J/ E3 \
- ctx.setDebugInfo("k", k);
* T8 |' Y5 p( u: D1 U - ctx.setDebugInfo("sm", kk);7 p3 x. z# v; y ~; i) b
- rt = Date.now() - ti;5 o6 C: s6 ~3 {! F9 `
- Thread.sleep(ck(rt - 1000 / fps));
3 L4 P& R) H9 d2 D# o - ctx.setDebugInfo("error", 0)
6 r: P' f! s; C6 j0 s' b8 L* ~ - } catch (e) {
+ H' L/ O4 E, Q5 v5 R - ctx.setDebugInfo("error", e);
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- }/ d2 o ~' B$ K
- print("Thread end:" + id);; n+ x4 s6 }# h6 G- v
- }
9 f7 k" W. H& x: g4 g2 x6 a- a - let th = new Thread(run, "qiehuan");9 @7 v# T8 k. H% V: q1 j0 A4 D
- th.start();
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& T. d) T3 y6 Q7 T4 {- function render(ctx, state, entity) {
- i9 g" ?9 d$ w: V/ Z- R+ T - state.f.tick();- J: \2 H( ?! i5 C
- }$ {, D# H0 D: a# {$ d
5 M3 z( S: k( x! `7 _) W, d2 t- function dispose(ctx, state, entity) {' [8 s6 p! N2 x9 B* D1 A) m2 J
- print("Dispose");4 s# r" B: \ Y+ b6 L/ s
- state.running = false;* s2 I2 f8 T* x7 w
- state.f.close();) J- `4 f+ M+ V+ m7 v
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- ; R$ L D1 Y+ t3 b+ [0 e
- function setComp(g, value) {+ x& x! ?$ G/ l( F5 V% n' y+ G W
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 n3 l( ^: g4 L, o9 y1 J1 x
- }
复制代码 5 a% V3 M5 H8 F8 _: _# M
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)3 ]: d; k0 W# f7 }5 t! @& E* Y( D
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