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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。
d, t# Q p2 w- importPackage (java.lang);: R8 e6 b7 c( `3 }% J+ [4 R" J
- importPackage (java.awt);5 g9 \4 D: x+ V# A% i% j
6 t$ @* l0 t% E( B9 Q& P- K# r- include(Resources.id("mtrsteamloco:library/code/face.js"));, P" D1 l. u( S
- % o) x4 B" ?. O' U# j3 @2 c+ k
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( p3 J( y. @) b
- 2 h- e: `1 w9 g3 R
- function getW(str, font) {
9 u0 [: u6 O$ I6 q. R - let frc = Resources.getFontRenderContext();
* q$ s1 h8 q. f - bounds = font.getStringBounds(str, frc);
' `2 C. h5 [7 F* T9 _3 b9 s - return Math.ceil(bounds.getWidth());
3 N3 A. v* w3 R' A. ~5 c - }
, S- ~- e- F6 ?& p) A2 N - # y; U! d7 K$ i O- ]
- da = (g) => {//底图绘制5 i' B$ X7 B. S; T/ M( U: a+ R3 u1 l
- g.setColor(Color.BLACK);7 G& o7 z& B6 u5 T3 E/ N
- g.fillRect(0, 0, 400, 400);/ U! @( G/ F3 t) O' t
- }
2 i4 } ?+ s8 v8 D
- q5 D3 |+ a7 d. `* b0 I7 R- db = (g) => {//上层绘制/ R1 H, _* E2 s( {2 I3 @
- g.setColor(Color.WHITE);
; F) w1 A! O9 p6 U - g.fillRect(0, 0, 400, 400);4 R: ~& W& G" Z5 E5 ^* D- v# ]
- g.setColor(Color.RED);' B& b5 n* I) g2 ]8 T
- g.setFont(font0);
! N6 b; S" s8 T6 J7 r" v" j3 i - let str = "晴纱是男娘"; f! d* j% ^! D. l/ `% q5 N2 W
- let ww = 400;
) E8 ^6 F: O& {, | - let w = getW(str, font0);+ T0 \2 d0 }* N' ~% O S: D( A5 V4 h
- g.drawString(str, ww / 2 - w / 2, 200);. O. ?, G% A. h5 O
- }( z( `/ K) n: Z3 L7 _6 R
- ( V" m# T _* @: @4 U2 i
- const mat = new Matrices();7 t* N2 j* X! Q3 s! n
- mat.translate(0, 0.5, 0);* W9 o( W& c# T0 V( K( h! D+ G/ c
3 b! q, g. q, h- function create(ctx, state, entity) {
% }; O' R1 I- N% K; C - let info = {
5 | ^' _) U+ F; t; ` - ctx: ctx,
" Y* B. N" O3 S2 y( d( _7 |( o E- i - isTrain: false,
3 B6 n" |7 p2 u. v - matrices: [mat],3 I1 d" g* T7 a) J
- texture: [400, 400],
7 F% L9 \& J% C. N7 [* Q - model: {6 z2 \. f, C d2 K R
- renderType: "light",
- B( |% ]2 J- Q1 S' n2 [! Q - size: [1, 1],
/ _+ r+ I1 o6 W/ b, b% O5 C - uvSize: [1, 1]/ d0 [, h S3 _2 P) o, x
- }1 b1 a5 v- n/ C! n$ y
- }) n# ]# l; ~9 ?+ Y7 w; \
- let f = new Face(info);( i4 @: P8 ^# d( e
- state.f = f;( G( u% r. J8 _7 y$ b
- ; ?( G5 J% K) G6 [% p
- let t = f.texture;
* w$ o4 K- m6 }. U1 p9 v4 s - let g = t.graphics;
. w& y8 { O: c9 \6 W1 W; I - state.running = true;
+ }8 T1 O" Y9 b - let fps = 24;+ e: t+ a( R) t( A8 _
- da(g);//绘制底图
& u+ G7 }- Y( }7 F - t.upload();1 p: k- Z: `) ]- ~+ b
- let k = 0;% T+ o6 I6 }; L N( _+ u( H
- let ti = Date.now(); Y( o* l; l, x4 \" O/ F$ ^4 {
- let rt = 0;* B) ^( v3 ^% ^& Q3 j; I
- smooth = (k, v) => {// 平滑变化! @* {: k1 n3 _7 r! ^2 N& O
- if (v > k) return k;
9 Q3 |* A6 ^ w x( E% D; S - if (k < 0) return 0;) i" C, B: o( V) X1 @. V7 H% X
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
4 u; ~6 Z% \$ z1 s4 k% y: @ - }
- @, u+ {) m6 k: d( V - run = () => {// 新线程
4 `. H' ^/ O4 l9 u - let id = Thread.currentThread().getId();' u3 Y" e. g2 y+ V' A y v
- print("Thread start:" + id);
4 I. p/ c- M: ]7 `# `: K - while (state.running) {; i4 X, j! o9 V. Q3 N& {
- try {5 _: I) K" ^: o" G$ T; ~
- k += (Date.now() - ti) / 1000 * 0.2;
7 x( y. G8 Z* I$ ]! A - ti = Date.now();+ P1 y" ^( q, Y/ V9 P' j& q
- if (k > 1.5) {7 I) o2 Y- D$ O- \; i' T
- k = 0;* i- c! |; P3 Q/ Z h, r
- }
. k; l5 y. p$ N2 F) n, G - setComp(g, 1);* V3 m9 D( r4 b' D% J
- da(g);
: @& D6 p+ ?2 f6 u. P! |2 r - let kk = smooth(1, k);//平滑切换透明度# ]! z4 Z7 N- r1 e
- setComp(g, kk);4 U P* \0 j% c) p5 g" S: T
- db(g);3 V$ z F0 R9 G0 b6 G: b
- t.upload();" Z) ^6 ]) Z" f* M. A6 |0 g
- ctx.setDebugInfo("rt" ,Date.now() - ti);
3 z. x3 m6 N7 I! q - ctx.setDebugInfo("k", k);
; i# R) w2 K' A - ctx.setDebugInfo("sm", kk);: L. @; e# q; n6 B7 k7 U
- rt = Date.now() - ti;% \! D s# ?& z, @& q
- Thread.sleep(ck(rt - 1000 / fps));
; z3 m; U3 _( C5 m. \: E, m4 w - ctx.setDebugInfo("error", 0)
) x' X' }2 D& N& ^% e+ H. T9 Z - } catch (e) {% s* g3 q, m4 @! r5 W: `, i! z4 P
- ctx.setDebugInfo("error", e); W: Z% `% c9 f) T. }, t' N
- }
0 j4 \# X. L; e' {3 h, [ B - }
+ u N# h! F1 U1 B5 y9 S4 t% W) L - print("Thread end:" + id);
2 y' h' b$ Q. W* d; ?/ j0 Q - }; ?# w- s: |* E4 O$ _. j, J
- let th = new Thread(run, "qiehuan");' B+ [) P9 D# P6 @' R. s$ h1 o
- th.start();
* J' ~2 k$ p. {5 | - }
* v$ c& N1 S8 F2 q2 H& \5 u - ! S. B I0 R9 l4 B
- function render(ctx, state, entity) {- X" M4 E$ g- X; H
- state.f.tick();, h4 c+ @2 d* }( F1 |$ R. b, U9 l
- }
& t; s9 u* C( I' C - ) d, r+ _+ Y/ Y+ x& W, U
- function dispose(ctx, state, entity) {
# Z; I2 A' X$ T; X - print("Dispose");3 x" ^& \! F+ F: m9 N! s! ?) }
- state.running = false;
% U( ]; X: v& [! N6 w- g1 k; \2 F - state.f.close();
0 w) w; |& ^8 I! H8 f: @6 c - }) k) H: k. ~+ H5 `
- ) G* g% c+ z3 A, \9 r
- function setComp(g, value) {
$ W0 Y( s* z& {9 I/ |& I8 a' J - g.setComposite(AlphaComposite.SrcOver.derive(value));: F- q, H6 y$ G7 `* t' Z
- }
复制代码 # j; {+ p; x9 M* @! e# m, P: 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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