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* T% i4 M, ?( Y3 D) }2 Q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。
+ ~/ B3 T6 u- m# o- importPackage (java.lang);
* j" G$ u" p& k7 r- C - importPackage (java.awt);
w. D9 b& v7 p0 [4 ]& X5 z, z - 5 C& b" q; Y* E# l; x
- include(Resources.id("mtrsteamloco:library/code/face.js")); h/ w/ ^5 K+ R, d
- 9 }7 m$ a; A" V. H: S& L
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); g+ W) X T9 F' e+ p, {( Y4 c
0 t4 a) T+ z% f! a1 j O- function getW(str, font) {
* X( |2 ]3 ?8 y# s9 b; | - let frc = Resources.getFontRenderContext();
2 J5 w! q: ]# q" h( l - bounds = font.getStringBounds(str, frc);* n/ B( Z0 [. d" H
- return Math.ceil(bounds.getWidth());1 P' Z8 M& c; V8 I3 F+ G
- }$ V. l/ ^& T! c& `( |6 ~& g! H( }
7 m$ h7 C: q, i& {1 _- da = (g) => {//底图绘制
; m+ k3 E9 B0 F9 o - g.setColor(Color.BLACK);
% t9 \% {6 t3 a$ W% D - g.fillRect(0, 0, 400, 400);6 Y! i6 ^) W1 ?. f) K& `
- }0 p6 U- X3 B2 F% K' j6 g1 b7 z
- # F+ W$ H' x8 D
- db = (g) => {//上层绘制
% ` Y. u7 o8 o/ @ - g.setColor(Color.WHITE);7 j% I! q& P! @" V
- g.fillRect(0, 0, 400, 400);
- R0 V. j# M7 z$ |6 P - g.setColor(Color.RED);; K$ ?" F( b( i f( \
- g.setFont(font0);
( _ ~0 u3 u A* {% o" D - let str = "晴纱是男娘";* s9 W- C, r+ V I* W6 l
- let ww = 400;
5 J$ w, N3 s9 b9 j - let w = getW(str, font0);
' |/ U* c! l' e - g.drawString(str, ww / 2 - w / 2, 200);) L% F* j( G& l
- } v9 k7 P- J' E2 ^+ \6 s7 ?+ j2 Q
# `0 c+ M7 H% ?1 s- const mat = new Matrices();/ _8 m2 |9 g" x7 [9 O8 ?; J
- mat.translate(0, 0.5, 0);
- {( H# a) m# D/ [) `: d
; V x7 n3 |( v4 K' o8 [) B- function create(ctx, state, entity) {
( u: \+ m4 W* Y* T+ o( M - let info = {
: \' m3 `2 N. ?' R& W, i. q" }$ ]) I - ctx: ctx,7 G" ^1 C8 i( T4 |, k
- isTrain: false,5 `( Z9 S' i1 T$ s$ ]5 z1 ?# [. H
- matrices: [mat],3 h% R/ d9 P3 p
- texture: [400, 400],$ P. r: Q9 t% A6 R) l
- model: {
, @+ K( X& `: ^( U; h+ a - renderType: "light",
: a6 r3 {8 l3 Z& q8 C# Z) I - size: [1, 1],7 B, D- P7 E6 _% D- E3 b# Z
- uvSize: [1, 1]
% W* Z7 Y* g9 X - }8 e: t( L, j9 g, m
- }8 D% m, Z9 d) _% g/ l$ I
- let f = new Face(info);
& f( v U5 i% s. J - state.f = f;# D8 o4 p2 U; A4 v6 ]0 j
- ; H6 s, w9 A! ~6 B7 Z1 H
- let t = f.texture;
* R) E$ G/ P* c v. Q% y$ j4 s - let g = t.graphics;
$ f6 r# d) M6 q - state.running = true;: S: |0 Y% S) F) Y3 A- H+ ~
- let fps = 24;
3 p4 e/ f: k5 J1 [4 w E - da(g);//绘制底图" w% N, N; A, ?/ G
- t.upload();, C* p5 L5 b: a; s) X
- let k = 0;: h% Y1 `- b+ W& Z. u i
- let ti = Date.now();
" m, S, m2 w, T @- Y8 o3 N. [ - let rt = 0;9 r6 T- p. A1 e8 C
- smooth = (k, v) => {// 平滑变化/ e9 n6 S) U4 d# j% v3 y/ H; H( @
- if (v > k) return k;5 `# n5 l- h: G3 C1 r J
- if (k < 0) return 0;! u, {! Q8 m4 f2 g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 k' l) s" c4 s' V) S! b' |( A - }3 j) e7 C# s( ^; z& p
- run = () => {// 新线程
_# Z( z- D4 A9 p9 a: K3 J. u - let id = Thread.currentThread().getId();# _3 ^/ V& e) P5 ?% I) H
- print("Thread start:" + id);
_2 f) e' U1 C2 C4 M' l& j - while (state.running) {. m$ t2 I9 }$ w/ H; }( Z( u
- try {
6 ]7 q# {$ ?& t' ^. T# X - k += (Date.now() - ti) / 1000 * 0.2;5 B! j& B% |% Q
- ti = Date.now();# m6 S. | E& H8 `* L! F
- if (k > 1.5) {
6 `# g; B6 P5 R5 x' {1 w& r - k = 0;
, f z8 G p- J3 g - }, X; D6 E: |2 V8 ]0 I
- setComp(g, 1);8 X8 }4 _/ v5 g' X# t# i0 E
- da(g);' Q. ^, K* s4 H6 _9 T
- let kk = smooth(1, k);//平滑切换透明度/ |7 d- W5 S0 W$ X: V( x
- setComp(g, kk);
0 c) a( R% q, M3 b. F3 Q - db(g);
% C2 e! t7 p6 X/ C# a0 O& r - t.upload();2 c6 T. w: M" O
- ctx.setDebugInfo("rt" ,Date.now() - ti);# s% r6 E: i. P
- ctx.setDebugInfo("k", k);
0 \8 u( R) u( x/ T - ctx.setDebugInfo("sm", kk);) J, W1 Z+ R9 H+ E; o' v- k
- rt = Date.now() - ti;
+ u* R& y, P0 Y4 \$ d& P `( X6 p - Thread.sleep(ck(rt - 1000 / fps));
- N5 _! W5 f7 c: ^) k - ctx.setDebugInfo("error", 0)0 ?. k% J6 Z. [% u$ x% ?$ g
- } catch (e) {
" _9 K2 \4 \' |* U - ctx.setDebugInfo("error", e);5 y% E0 T$ S, I3 @- ?
- }
) L* z% t6 ^) S - }
0 P! D8 v+ u* x/ W- a - print("Thread end:" + id);' q( C5 _0 `" K( N) R
- }* a( v4 R4 ]# J( a! D# Z
- let th = new Thread(run, "qiehuan");
2 v! {6 Y1 U0 T( g1 g$ J9 d( t' B* H - th.start();
( ~+ @2 Q: p) t, {3 E) ]( P - }7 b( G8 h* }! G4 [9 [
- - _7 r. W, v8 C! w% v" X2 _
- function render(ctx, state, entity) {/ ]- V" @6 \5 Q7 M/ I* P
- state.f.tick();4 |2 F4 t- U( q/ B) c
- }
7 @& R3 J& l2 [0 O7 W4 ]0 v! M
, U+ R" \: u+ A7 T- function dispose(ctx, state, entity) {
[" L6 r! W* [" A - print("Dispose");( ? Q: |6 H3 J- r v
- state.running = false;
( N* n- x3 \# C - state.f.close();
" N$ V/ o& k$ _ - } b; [! y3 q- c2 f8 @
- & v; @ ?( S/ a4 K6 K# |( M) }
- function setComp(g, value) {% R0 I# C0 s3 v/ k% D
- g.setComposite(AlphaComposite.SrcOver.derive(value));# T5 |% y' n& ~- Y
- }
复制代码
, c; F) C6 Y6 d2 |; `' l8 k2 O1 ?7 [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。6 V, e9 i o5 |7 U! N$ y) I
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- m! m) u& s5 |7 x
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)1 D9 A- A' G: o/ `! a
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