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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。7 r Z' G5 M# W. i
- importPackage (java.lang);
: T! S. O e H8 t - importPackage (java.awt);5 H& ~: W) o0 m: j1 `& n
3 L/ d1 `. Z3 V& M. c# n- include(Resources.id("mtrsteamloco:library/code/face.js"));
. j4 ]; [- A# s0 k% l; a
9 K, i0 n4 |6 h2 H7 P2 o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& K0 @& [6 H4 C n
- ; @: D/ B g+ C; @8 f: q8 r
- function getW(str, font) {9 r6 p- O. ]+ ^5 L& J
- let frc = Resources.getFontRenderContext();) { ]) K+ P/ a* a E9 g
- bounds = font.getStringBounds(str, frc);: v7 d1 B' v, h* f" N x
- return Math.ceil(bounds.getWidth());5 A9 j6 f! s! D+ }; l/ S
- }' U+ t$ q9 W+ n# m* M
6 Y- B! Q9 v" z- ~4 e' L4 m- da = (g) => {//底图绘制
5 H9 ?$ b3 h" [& b - g.setColor(Color.BLACK);, N& ~3 D3 n3 b( e5 ^9 }6 w
- g.fillRect(0, 0, 400, 400);7 c R' _8 w! b( w
- }9 p1 Y! q# g P `1 p$ k
- 5 H" n1 a. H, L8 K5 G" U! K
- db = (g) => {//上层绘制
# C, V5 T1 s% N* b9 K: h- |0 S - g.setColor(Color.WHITE);
9 W- E0 P, N9 P o+ J( T9 o - g.fillRect(0, 0, 400, 400);
. \9 e! C6 [2 J+ a0 A0 F - g.setColor(Color.RED);
( W- |. O) c4 a9 [$ o - g.setFont(font0);/ {. y; d; j2 b r- I; T
- let str = "晴纱是男娘";- ^- A5 c/ z8 T# H1 U
- let ww = 400;* M) C% {% ?$ l a' q( Z3 g
- let w = getW(str, font0);
+ J5 V' o4 e1 A- A- Q - g.drawString(str, ww / 2 - w / 2, 200);
& l9 ^8 p: z$ X3 S2 ]- [ - }% C, j" u& f( Q4 ~5 H" ~% e
- 4 ^' f3 X& M7 P) ` V0 z+ f0 T7 }- w
- const mat = new Matrices();$ Z* y, T) H# b5 Y) n; ]. }: ~
- mat.translate(0, 0.5, 0); z; a [0 b) v5 D: T2 P8 t2 ~, }
- ! l) v+ `( Y6 b I4 U, a8 E
- function create(ctx, state, entity) {
) ?7 H8 g2 c5 l j" H' ] Z - let info = { V3 M1 }) w" K# o+ H0 q+ @% G
- ctx: ctx,: _" t7 E( }8 V4 T
- isTrain: false,
2 ]& S! h0 D$ S- z" S; y, D - matrices: [mat],
# i7 `# A) c& O6 p( U - texture: [400, 400],' O( u/ x! E) z: ~ f& ^
- model: {
Z4 v8 ?# R6 D0 h D, E6 h - renderType: "light",: I" ~( ]' o6 c
- size: [1, 1],
% U' D+ Y- U ?& G - uvSize: [1, 1]
7 g7 H- G' u, H+ t; N2 Y3 I! e - }( m: g5 r* v: H# C v
- }
) o: n: d* _% x$ b - let f = new Face(info);% O' _, U. H; O7 F( _3 F
- state.f = f;1 ?; Z, x* J* R n) J1 \% H- \
; L) J0 u( f% z; p3 I2 k- let t = f.texture;! q; c" L' U8 \% H
- let g = t.graphics;
% j; v7 S$ D" T+ Q: x& D# J" z1 V - state.running = true;
0 G2 A5 }( Z N - let fps = 24;
( I( V, G0 t1 h6 O/ W$ Q - da(g);//绘制底图" _6 \& d+ ~- @) ?, `+ y
- t.upload();" }; H3 T) \8 }! ?
- let k = 0;
- g+ i2 \0 Q2 M4 L- ^9 l9 ?3 _2 G0 m# _ - let ti = Date.now();
% o# `4 ]: s6 s* m- D - let rt = 0;
' ?$ ^7 N1 _& o* @4 X! b - smooth = (k, v) => {// 平滑变化
; a' y5 z/ l5 t+ {. b9 B - if (v > k) return k;
$ M# S: n3 J6 I! ^, n/ O - if (k < 0) return 0;
2 S) a" M9 N5 A) F1 ^' h3 H: ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. V8 f9 y5 e8 Y. ~
- }
+ I* S' V) A$ h& {! O - run = () => {// 新线程
0 [$ g; M7 o5 W4 s: Y; p - let id = Thread.currentThread().getId();- Q4 F7 W1 C2 G1 L1 A* E
- print("Thread start:" + id);+ C' W9 N' r- V3 t+ J
- while (state.running) {( V6 }! o- u, L- D
- try {" Z+ f- {; ]* O7 I2 U
- k += (Date.now() - ti) / 1000 * 0.2;& f3 [9 T8 f" Z- h+ u
- ti = Date.now();: G6 f& T s+ V/ K
- if (k > 1.5) {
# a0 l6 Z/ v5 D! k _ - k = 0;8 z9 o! T9 B: W: t' ~
- }
" N+ V: g- x; r; \4 ?1 N9 ?1 I - setComp(g, 1);- R: ^* i/ V' ]' B
- da(g);
+ L0 @4 r7 B3 I. I1 i - let kk = smooth(1, k);//平滑切换透明度& P8 n0 e/ N: `2 |! H" x& l
- setComp(g, kk);9 u/ m; r, m# `2 [1 q) d
- db(g);0 `- z0 H/ C" s
- t.upload();
! ^2 }2 L8 a% Z( W - ctx.setDebugInfo("rt" ,Date.now() - ti);
l2 V9 g7 G( S6 O+ L+ v - ctx.setDebugInfo("k", k);
% T4 Z: [& Q- ]0 W$ l* J7 D - ctx.setDebugInfo("sm", kk);
- V) f; t5 @% g6 u - rt = Date.now() - ti;7 f% m ~6 z R$ `
- Thread.sleep(ck(rt - 1000 / fps));( G$ S9 }1 u$ h* T. I4 v9 q
- ctx.setDebugInfo("error", 0)- G1 y" m T9 Z- c7 [
- } catch (e) {
7 o4 F% l2 y2 W5 P - ctx.setDebugInfo("error", e);
0 O/ S) }4 n# X: R; y3 W- k - }
& c3 V2 S( \* \; \) o6 b - }* K3 N8 J* q# W0 \4 G6 [
- print("Thread end:" + id);
) U6 b, d% v" \" O0 \ - }
$ i2 c# L/ ]4 f2 X - let th = new Thread(run, "qiehuan");
2 x/ ~4 x% x8 h* @( A6 p- |( T4 T1 r - th.start();
- t7 [/ ?3 `% t4 L' g& v0 Q - }
: e6 x/ D3 |$ a* B& I9 v
' k9 J) W/ _1 ^5 y9 c; {$ y- function render(ctx, state, entity) {9 F' A/ W, Z9 M* ]: s
- state.f.tick();
6 [) }8 t7 ]2 f V8 ]. b1 E - }
+ F2 G! a! ~. P: R* y4 J+ o. z - , \$ \* f: q' E/ S) t! Z5 Z" B
- function dispose(ctx, state, entity) { t* C, f5 s7 ^# O) H# m
- print("Dispose");
4 V* t l! T T1 p9 J5 U* E - state.running = false;
- w/ v2 w8 T' `4 d% y2 o - state.f.close();# U8 Y) N1 G- u( |/ X
- }2 g+ {+ f2 Q7 j
9 j, @+ m# E9 Q! ~2 K% g2 O9 b- function setComp(g, value) {+ b3 S' M- W0 f
- g.setComposite(AlphaComposite.SrcOver.derive(value));
y' r# ]0 n! B, m2 z" P - }
复制代码 ; J+ z) a. J% D# \2 t% l3 B
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。* m, x# `$ A6 H0 B+ j- F
6 [8 W/ j& y) K3 \3 o0 }# r! g! P, ^0 _7 X: R. H/ @% Z$ M+ V
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)' |9 H: y0 x! T, K1 B }$ |, `* X V- i1 v
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