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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。
$ N5 I) e* N4 j- importPackage (java.lang);) S/ J8 d) y4 h/ i
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));; K3 w5 x1 H+ ]0 x/ l
- , E) c! v# d2 j. X5 }, [4 B2 {; r/ o
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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& h% u( @! k' _' Z9 W7 R. S3 Y' j- function getW(str, font) {" Q7 {1 u8 X' q
- let frc = Resources.getFontRenderContext();2 T o0 l V4 Y3 ]. a9 F; F3 I
- bounds = font.getStringBounds(str, frc);
0 P7 L+ N2 a3 I) S7 M - return Math.ceil(bounds.getWidth());
" a+ D* p$ a6 J3 b: N% T: s$ u! m - }
# D* k& J4 n3 o. f - 3 r% l$ z( ~; b$ | ?
- da = (g) => {//底图绘制3 M' K7 y$ A4 m5 G- h8 [% `
- g.setColor(Color.BLACK);9 w8 s+ g4 D, l$ k- l
- g.fillRect(0, 0, 400, 400);+ `. y' N/ _" _! X
- }, V$ m$ ^! u. K0 q
- + Q# C, k/ C- T
- db = (g) => {//上层绘制
( B+ P7 q4 ~1 G$ O& n/ w& K5 \ - g.setColor(Color.WHITE);( \, i# _& v# W3 l0 @* _
- g.fillRect(0, 0, 400, 400);
+ p q2 D+ p- p* U+ d - g.setColor(Color.RED);: Y+ k3 q1 H3 r# L. z
- g.setFont(font0);# T: g1 x; W2 J% U/ @
- let str = "晴纱是男娘";
" E6 N1 s4 b5 R) q& A - let ww = 400; G0 Y6 P: p7 l; P6 L
- let w = getW(str, font0);
9 V0 H) E1 ?6 e - g.drawString(str, ww / 2 - w / 2, 200);
/ `" v; C, t0 _& G - }
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6 P) B6 d6 e2 v" H4 w- const mat = new Matrices();; Y% t0 y3 @9 X/ i m
- mat.translate(0, 0.5, 0);, ?9 P3 F7 G }# p! |
% `# Y" X/ T' R- function create(ctx, state, entity) {, E. p1 }6 I7 F5 R
- let info = {
' g1 p: q7 _2 s8 Y8 n# q' Q - ctx: ctx," X- `& Q3 ?+ e+ G
- isTrain: false,- u8 B' n( e- q) p7 X* G; O
- matrices: [mat],
+ V. j" I5 _7 \" d5 U, y/ ~% N - texture: [400, 400],/ O* B2 _5 I- c+ O3 I. h
- model: {
9 e2 r% q& T* F1 T/ H: O' T - renderType: "light",
% I5 q& F' Z8 j) U. y) F8 n; l - size: [1, 1],
6 x" a, h' z* @0 P9 ] - uvSize: [1, 1]6 _1 `8 Y% B) ?0 e0 z
- }$ W- {" Q( y( K" W) i: @( d! Q) ]
- }
" P) V5 `7 q0 e: x" Z* `7 w - let f = new Face(info);
. d1 Y0 B1 ~) Q& I7 M* b% r- v5 I1 T - state.f = f;
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4 o2 ^6 A! o$ e3 j* r- let t = f.texture;
7 l$ [3 [' b- l0 f- H - let g = t.graphics;
' J$ o, Z7 O/ j - state.running = true;
) e3 }. X0 P @8 A4 f - let fps = 24;+ @# i2 n9 M( `7 w7 l( h
- da(g);//绘制底图
7 `: @+ `' ]. c, e - t.upload();5 n0 z% X9 j% G: Q
- let k = 0;! |) W! |" c- I8 p0 K! V- C
- let ti = Date.now();
1 o6 m8 c _$ N$ `" s - let rt = 0;7 D( \7 h) Y. v
- smooth = (k, v) => {// 平滑变化
8 p8 u1 Q: d) n: Y: i9 X; B1 V - if (v > k) return k;
* h ?* { F3 v - if (k < 0) return 0;0 v# _- \! d5 M5 e
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 p. w7 q A; ~$ { - }% b4 N" T$ a, q& {
- run = () => {// 新线程8 j3 U, r s- w6 m8 U
- let id = Thread.currentThread().getId();
6 |" I5 H$ f) ]7 r A! I& f - print("Thread start:" + id);
8 A% w g) m2 { - while (state.running) {
+ g" f" O2 U* m - try {) v7 i1 X ?0 ]( T. f7 {6 \/ g$ K2 Z) s
- k += (Date.now() - ti) / 1000 * 0.2; }. Z) W% K2 Q6 M
- ti = Date.now();( \/ `6 B" M+ \
- if (k > 1.5) {" c- o# e# p5 |
- k = 0;
: X- v1 ]& `+ Q0 C - }
4 l! V7 x; x: l8 x5 J - setComp(g, 1);
9 ^. K" c5 B/ _0 [* X6 S - da(g);
9 ]) {( r4 k: j S8 F1 O - let kk = smooth(1, k);//平滑切换透明度
. R- s5 E% g' C9 U - setComp(g, kk);
8 Z0 w! ^' }" M! P - db(g);
! U1 R* I' s& v - t.upload();
9 s3 {+ t: E3 b) g$ B" H - ctx.setDebugInfo("rt" ,Date.now() - ti);) a I2 n* Q- v: ]( e$ f6 t) ]
- ctx.setDebugInfo("k", k);$ X+ X0 Y5 h. K, n4 Q# `
- ctx.setDebugInfo("sm", kk);# h' |, }! Z( ~( S1 B" g
- rt = Date.now() - ti;
' j8 @1 `: p' p9 Y0 Y, J6 W) u - Thread.sleep(ck(rt - 1000 / fps));6 p' l( |- v0 q" P" }- g2 }
- ctx.setDebugInfo("error", 0)2 P' n/ }3 E4 u0 q
- } catch (e) {
T ` B. T$ j5 x2 H, S1 j$ Y - ctx.setDebugInfo("error", e);1 k+ U( |3 r0 x& u. [( @
- }
: E+ S( C$ u5 R. M% a3 B- d" C - }% T* r5 a- g3 _5 z% q9 Z5 `+ P
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
5 H5 u$ J6 f0 A; [& H+ ^ - th.start();, K* R2 ?* w! `; ^
- }- l* E1 b8 x5 z5 B
- ; h1 h7 g( V W" f
- function render(ctx, state, entity) {* {) n1 i) i% `( o
- state.f.tick();' y9 E8 n! A8 L
- }4 Z7 ^& y' s: J- }& |8 [4 K% k' k
0 x. G. E* P+ {1 k- function dispose(ctx, state, entity) {
( G) m" u: H" K- s ~( y - print("Dispose");; c6 B/ q5 k5 m- s. P/ H1 [; C- \' P
- state.running = false;; y+ F. y5 O% k H( z
- state.f.close();, ^6 s$ E- y% @
- }. a( [8 B; g2 w5 C7 F! p3 F
6 u- R) |% {. Q2 ~- function setComp(g, value) {; r$ k4 s* v3 b2 {, w! v
- g.setComposite(AlphaComposite.SrcOver.derive(value));
9 r+ X; a0 W3 g$ W6 ?4 @! r, ^& k1 ]1 n# f - }
复制代码
( {6 @6 c b0 |' q- ~/ L+ O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。. g7 E: q4 a0 n! e8 x X* t
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2 E1 L# N6 B' C1 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)
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