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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。
" L" w' F4 w6 Z- }) \1 T7 Z- importPackage (java.lang);: s" c8 Q* W8 j; ]; l$ p, X
- importPackage (java.awt); E6 f# G4 u' T; e! R% p+ y
- ; d9 n, x) j6 V5 S1 U
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
7 \* P# H# k- I# E' _
7 S, v* a8 f* p/ l( { a4 V- function getW(str, font) {% L) X) \% {4 `8 t" h2 P+ S) q# n
- let frc = Resources.getFontRenderContext();) a5 ?& K: v* Z
- bounds = font.getStringBounds(str, frc);5 u2 T2 G/ q: j+ X
- return Math.ceil(bounds.getWidth());- P. |* {3 Z! }3 c5 y
- }
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9 A4 c+ [% J( |; y" c: y7 B- da = (g) => {//底图绘制8 s7 g4 R1 v* s' ?$ E
- g.setColor(Color.BLACK);
9 A& u/ r. K# e - g.fillRect(0, 0, 400, 400);# g" ~& D9 b$ x; q, {2 t
- }
9 g) s6 c% O' [8 l! [ X$ j - . E* ]( C. Q5 Z6 {( K8 R6 w' q
- db = (g) => {//上层绘制7 l/ F) E. ?5 C# k
- g.setColor(Color.WHITE);8 L0 b% \6 n# i. A }% B) O( N& l
- g.fillRect(0, 0, 400, 400);2 Y2 ~% x1 A7 V% r+ }' {1 Z
- g.setColor(Color.RED);" w/ e$ d' m+ k" _
- g.setFont(font0);( `& w i- t3 G2 u8 U6 N* ]
- let str = "晴纱是男娘";9 e$ L! |% K4 J" h: S% t3 e- r
- let ww = 400;' n Q# `! e6 ?! X3 w5 ^/ z
- let w = getW(str, font0);
1 K3 O3 T1 U* I" y* n4 U: t; r - g.drawString(str, ww / 2 - w / 2, 200);
% i3 {# d/ M8 |1 O - }
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9 [. C# h& F; R, H8 n& u- const mat = new Matrices();% r/ U4 r+ G, ?% {. h! a
- mat.translate(0, 0.5, 0);3 w2 s. u) k7 R/ y- O1 y C
- 8 {0 j( c1 X, l6 D: B% i0 F
- function create(ctx, state, entity) {
8 q9 R, Y6 O2 l: @4 t- I7 s - let info = {: b; r) ^4 L; e- o% O
- ctx: ctx,/ l; C. | R7 | ?1 p
- isTrain: false,0 L% M8 ?& u- k' r: }6 x L1 O- [; [) p
- matrices: [mat],
) O0 Y1 y* D- [9 W9 D( n - texture: [400, 400],, P2 T/ P3 c4 I) D* x9 @
- model: {
$ U; @& R9 y: R - renderType: "light",
9 v6 U$ Z- D+ c- k+ i- U& J - size: [1, 1],
9 {8 |" d t0 D1 ? - uvSize: [1, 1]$ N" s* Y8 z( ^( r
- }7 \: K" b8 s3 b6 S2 t/ U! o4 Y* A, d
- }
/ e9 O+ V# J% n* p2 q; F% V! S8 O - let f = new Face(info);
8 V) n3 _1 v5 m0 m* g5 z1 F" a - state.f = f;2 n0 P9 P" a( F
- ( i; K# `0 H) H2 v& @' F6 X ]( _
- let t = f.texture;
) K7 Z- U) X3 q& ^ - let g = t.graphics;2 q; s% f% Y( {, s4 V. P( i( u$ X
- state.running = true;. A' a+ b2 a" T# ~4 x" f
- let fps = 24;3 L# p6 K5 v. f
- da(g);//绘制底图
$ K' Z: e( b6 H4 @4 X9 n& Q - t.upload();1 O# \" h1 C; \. Q) J3 w0 D9 W l y
- let k = 0;" o s# b% q/ s X5 }( s
- let ti = Date.now();
' d9 Y* q9 [* Z! q- \* h - let rt = 0;
; [* e: r: d2 Y4 I5 g/ P6 { - smooth = (k, v) => {// 平滑变化2 K& {, u1 p- Q
- if (v > k) return k;
$ O$ R* X6 G% f; h1 L, s - if (k < 0) return 0;
/ u+ ^ c! S) K% {& T- {7 Q+ P - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" l* \# N0 }% L0 J9 ~
- }& q3 {6 |! K: _0 R
- run = () => {// 新线程
9 m! N- s1 p5 m7 Q - let id = Thread.currentThread().getId();
. A6 w. A# n" a$ y) e& ~$ h - print("Thread start:" + id);
1 F. j6 ^0 c! Q0 Z% K - while (state.running) {
# q/ v. E/ s7 ^( x - try {
: F" D2 u) Q( Q" R) C7 _ - k += (Date.now() - ti) / 1000 * 0.2;
3 ^9 ?9 G* O. K3 A1 A5 K - ti = Date.now();) o/ @ p6 r5 _8 I# m( X( j1 F
- if (k > 1.5) {
, x0 |- f# i+ |0 c" E( f& b+ j - k = 0;
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- setComp(g, 1);
* u3 O" g2 K$ \( B; t - da(g);/ v) }$ S5 Z% r- U
- let kk = smooth(1, k);//平滑切换透明度! m6 C# \0 W* u
- setComp(g, kk);8 ]9 [' a9 ]) H
- db(g);
1 H* `1 ^4 n; u8 N5 S% ]5 S - t.upload();
. p! i& ?( j6 p; N0 } x5 f* T - ctx.setDebugInfo("rt" ,Date.now() - ti);% y7 C( z+ L, F
- ctx.setDebugInfo("k", k);- z+ k% |! {9 Y+ H& Q |9 a
- ctx.setDebugInfo("sm", kk);
/ v3 c+ G+ X( G- m - rt = Date.now() - ti;! d; x% y- O9 s2 r$ L2 a
- Thread.sleep(ck(rt - 1000 / fps));
5 Z: ], Y* p$ D. O7 ? - ctx.setDebugInfo("error", 0)
' m; J( u4 Z4 K: e0 K& l - } catch (e) {
: e2 u" Z+ P N9 K2 W" ]& ^. I - ctx.setDebugInfo("error", e);: m) L4 m3 g: D" \
- }+ t2 O# _' W1 l: M# _& ?
- }
8 t! o9 [* r* Y) a; k9 T; O - print("Thread end:" + id);- \% T6 u5 D$ S8 D6 z8 D
- }
' h: K6 P5 T1 I5 u3 E( B0 I" T - let th = new Thread(run, "qiehuan");8 r, }* N) A1 R _8 G' O
- th.start();
. d! D+ Y: f7 }$ Z' b* @ - }
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- function render(ctx, state, entity) {
8 N( x' i+ W* R! s% j# h - state.f.tick();. X) `: W+ c) Q5 _2 g" J0 l5 j
- }
, j4 Y1 @; l( q& A8 \4 w - & t+ l! U! V, V2 G# R$ v, o5 _4 j
- function dispose(ctx, state, entity) {
6 s k2 E) U) F X8 a/ Y - print("Dispose");
# N# b+ c+ r4 V9 D! i - state.running = false;; r* V) v, y) p3 Q. P1 O) }; n
- state.f.close();# K: z. I& v+ Y" b6 @2 J
- }9 X4 Y3 X D5 @' |! y
- q: C. M) i: Z9 Z% }( M- function setComp(g, value) {
) ?' B" X9 s0 S; I3 i8 U# K - g.setComposite(AlphaComposite.SrcOver.derive(value));
* h! n- k5 B/ |, c - }
复制代码
$ f) ~6 g' O& ~& k. h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。$ c/ A, B4 w1 z& y7 a
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2 |! i( v, t' N; 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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