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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。
5 D- M% c8 F0 j, w# y- importPackage (java.lang);
; l9 V7 b- R" Y - importPackage (java.awt);5 z4 n/ B% u) t/ |/ A
6 j$ P3 S3 h8 }) B5 k5 f; E- include(Resources.id("mtrsteamloco:library/code/face.js"));$ l* @, \" a( Q$ y' {
- 1 V3 z8 Z3 x) U8 R8 l
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ g7 z" G- y; f2 g
' ^4 j: A' {8 r! G- function getW(str, font) {
3 z$ ~" Q1 U7 q- }; ~6 O% l - let frc = Resources.getFontRenderContext();$ W& w, D/ l5 J* Q& c
- bounds = font.getStringBounds(str, frc);" M& t2 Y4 o! I$ g) }
- return Math.ceil(bounds.getWidth());
0 l2 o# \; R1 F" k; k! n( p, e - }
; {7 _% A* p9 \, v - 7 s* _, O- C: a* H; M5 p* l% R
- da = (g) => {//底图绘制5 R1 W( U( Q8 O- q
- g.setColor(Color.BLACK);" x2 Y& b8 b, y* \
- g.fillRect(0, 0, 400, 400);; L/ B5 d3 q D- {
- }# q4 c7 i+ |* a1 O5 q: U. e
* N( o- z4 E! {$ V- db = (g) => {//上层绘制0 Q: G; N l. R
- g.setColor(Color.WHITE);
$ c/ |; d* t8 u. f' } - g.fillRect(0, 0, 400, 400);& E4 _3 e; S" w7 w6 F, Z) O5 }/ u
- g.setColor(Color.RED);4 @" Y9 z3 F6 I: g5 c+ E
- g.setFont(font0);
+ i$ j$ f e/ f0 b - let str = "晴纱是男娘";) a" k) ?3 \, ?2 q5 l
- let ww = 400;
$ R3 d. D( \0 i7 g- O) P - let w = getW(str, font0);
: o0 c. D- E* ]" o! t - g.drawString(str, ww / 2 - w / 2, 200);
, n; F! G' o1 H$ | - }) h1 s" P4 z: _/ e7 @+ H
$ P3 B8 R( D2 q) [6 ?5 d$ Q- const mat = new Matrices();
$ g. L0 x( H, n/ l: t - mat.translate(0, 0.5, 0);
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8 ^$ F! ~1 N$ e' z6 f' ^- function create(ctx, state, entity) {$ E: X2 k; F5 q1 Y
- let info = {) y7 t7 B7 L3 Y, V
- ctx: ctx,
$ s/ M5 O7 @% Q& c+ j m( A - isTrain: false,
. t9 C: b7 b8 h8 I+ _ - matrices: [mat],
* v, r' m) g: R& j# W - texture: [400, 400],, R, o' j1 C+ E
- model: {
! i1 l; {; U) _+ G - renderType: "light",9 X; o4 i, D' i0 B& g9 A$ g& D
- size: [1, 1],
/ M; [8 [8 H9 k& D* G0 u* p+ l! B; F - uvSize: [1, 1]2 T+ b+ B1 ?4 i, ^% |
- }
- r) q& l0 g, G - }8 L4 h8 T9 u1 A7 \5 `( j" u
- let f = new Face(info);- c" C& G2 q: D$ V, V- B
- state.f = f;
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- let t = f.texture;7 t# V% h5 b0 I' }
- let g = t.graphics;
( D) C, ]6 H* R( T - state.running = true;
/ F2 I) k" X7 R( g - let fps = 24;
% t4 ?5 m' i; c9 D - da(g);//绘制底图8 W, c' [3 \6 d. z4 n
- t.upload();
0 I5 y/ @/ z2 K' q0 @ - let k = 0;) W$ Y/ n3 H+ I
- let ti = Date.now();
1 n) Q) F3 {& v - let rt = 0;
) [" d- \8 [+ o8 T9 g0 w& n - smooth = (k, v) => {// 平滑变化
* y6 H0 H0 @/ T6 ^ - if (v > k) return k;
3 W' p( _, g/ @. S/ c* c - if (k < 0) return 0;% @4 q) W- G$ L2 L' B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 X4 E; i! [3 h- r7 D/ K! }% G& V+ u* U
- }
, T6 P- c& L7 T2 k - run = () => {// 新线程 }* p+ y% K! k- m
- let id = Thread.currentThread().getId();
! D9 R" D+ l# t/ e# @ - print("Thread start:" + id);
% p2 f3 d3 U% @+ R - while (state.running) {
/ C& {5 ]. B) ?# f- | - try {: s, a! J, s, M2 G
- k += (Date.now() - ti) / 1000 * 0.2;- u/ i/ y9 z$ `4 e' J$ a( x
- ti = Date.now();
: M$ R5 e. U& C8 p) [. h/ u2 u - if (k > 1.5) {6 Q+ ]( w+ Q: D( h5 t2 n( V
- k = 0;) X) f" F6 o) H4 s6 F3 m9 y
- }
, S& n. R! s& o& b ^" V - setComp(g, 1);
6 G* N- O1 k' Y8 m - da(g);5 q6 {4 {; t% [3 O3 F4 i
- let kk = smooth(1, k);//平滑切换透明度* O1 k) Z Q( n: R# I( Y" O H
- setComp(g, kk);. e. r# j( F$ z
- db(g);
- x5 @" M# m7 z; O5 c1 W8 v3 R U - t.upload();" {& P1 P4 }7 ]; F# u( j- z
- ctx.setDebugInfo("rt" ,Date.now() - ti);1 b0 x: f- I* t8 [9 Y% Y7 z
- ctx.setDebugInfo("k", k);
' c8 ?! B; z# ? - ctx.setDebugInfo("sm", kk);, O4 A" p1 e4 h- C$ n" k' S
- rt = Date.now() - ti;
, a* O1 [% A9 @" L$ i8 @ - Thread.sleep(ck(rt - 1000 / fps));
) g9 x/ x$ o1 |1 p - ctx.setDebugInfo("error", 0)
- w+ w3 [: i0 a$ b - } catch (e) {- i% ^- M- W% P: V
- ctx.setDebugInfo("error", e);
- ~6 R8 L6 ^' g6 N - }: J' {, v3 Z* Y
- }
0 v* A$ f' C/ Y9 ^& t9 a* p) X - print("Thread end:" + id);! r1 ?; p* @7 e4 r
- }
0 c# {, \6 @1 G, ]. P - let th = new Thread(run, "qiehuan");- p6 t* U4 |; g- f
- th.start();+ @# M1 ?. ?2 ~+ x
- }
1 V; C6 k3 h7 O, ?; q - , z4 W' b6 J* T7 P q) s
- function render(ctx, state, entity) {
- ^( x& C4 B% @8 n- a" j - state.f.tick();: H+ l& M# ~. U
- }
8 ?/ S( |% T7 p* Q- C7 x/ ]
' c( @2 f$ s$ i- function dispose(ctx, state, entity) {, U' s' _# m0 f% o
- print("Dispose");" d, ~8 x0 V- N7 _
- state.running = false;
+ L" m b! [0 ?7 w - state.f.close();2 F3 h! S% [ a2 @: c
- }
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1 Q% Q7 X- C, P8 `- function setComp(g, value) {
" Y! c3 y: b6 g+ U" Y5 ? - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 e1 Q' D2 I. e; `$ g - }
复制代码
+ k8 d1 U* w; p6 e% R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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