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" _6 E1 ?$ e2 L: f- ~3 w! N; w. y3 z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。% Y3 P7 t) m: q) [6 B) u0 {
- importPackage (java.lang);
3 d+ L9 W# Q4 |% D3 n7 I" O z - importPackage (java.awt);
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# R' c" I6 ~6 S; L }- K) N4 N+ k- include(Resources.id("mtrsteamloco:library/code/face.js"));
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4 k/ O6 k. o+ l; e4 _; \" y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 h4 S4 v( i7 R& T; @0 Z }7 |: n
/ |; R V) H, f- _0 S+ R m$ w: i- function getW(str, font) { N4 k; s* @" f h
- let frc = Resources.getFontRenderContext();. K5 |- g' g! T
- bounds = font.getStringBounds(str, frc);8 Q. ]# T# F3 C( R* H
- return Math.ceil(bounds.getWidth());
# h1 d( x. A7 F" E# r - }
' z# P9 K4 [: P - , `+ Z' B# a+ j a
- da = (g) => {//底图绘制
_' \' f& F0 y9 ?( c @: f! q, v5 X - g.setColor(Color.BLACK);
- x; O7 r- s& o W - g.fillRect(0, 0, 400, 400);/ B8 V: w% `5 [* w/ w2 `+ ]/ r6 m8 ]
- }
& E) N$ F. I7 ` - - ]5 p" T/ R2 C [
- db = (g) => {//上层绘制
5 m" k: {- H+ l% A/ {6 p, K' \ z: k - g.setColor(Color.WHITE);
+ w* h; {3 }; x8 ^% r - g.fillRect(0, 0, 400, 400);. s* e) X1 v; ]9 M6 E6 V1 B9 Y8 `
- g.setColor(Color.RED);
: k( z; k& w9 E# `) x! i - g.setFont(font0);
% i) f- A: F, c9 m. ~/ B - let str = "晴纱是男娘";) L' z& Q$ J3 y( e& ?
- let ww = 400;
# h: j J* |: R3 ] - let w = getW(str, font0);6 l$ b& V" G* c
- g.drawString(str, ww / 2 - w / 2, 200);' f4 b& Y, o, z) f* D s0 d! h; m+ h4 j
- }. X( V, ~. i% K4 G/ S h
5 C# q7 N' w, {* q- const mat = new Matrices();
2 D, M( p% _1 N - mat.translate(0, 0.5, 0);
, @0 U* H# e3 ^- H5 S: C6 Y, I
) E: Q5 Q; r; _$ V5 d+ [$ z: x- function create(ctx, state, entity) {
% g5 H* J$ e1 y8 t! u: Q8 Q - let info = { I/ b! g+ C/ t W
- ctx: ctx,
0 y# A& h/ l2 w: u' `% p - isTrain: false,
) m; ?; h7 n/ \2 E' u% `0 l - matrices: [mat],
2 E& h7 Z) H h - texture: [400, 400],
. h f ~; W2 w, s0 J! C. B - model: {
5 U* [8 [. m" c) f% w0 c0 i - renderType: "light",
6 i* i% d2 f, t7 ]! h, u8 \9 } - size: [1, 1],
" o( P1 V8 ~. ^7 I& n - uvSize: [1, 1]/ i/ ] _# x0 A
- }
5 R' `. ~! v5 z8 B - }
5 x2 |/ o! B0 O# M- ?& B% U - let f = new Face(info);
5 b; {3 F. ^! j/ Y - state.f = f;
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R X- T, O* O- N- b6 f6 n- let t = f.texture;
7 x0 C* j0 X, p4 l& f" i - let g = t.graphics;
0 a0 [1 I* H; N3 Z2 l Z6 }3 u - state.running = true;: m! c/ {" t8 N. B* K7 R T+ L
- let fps = 24;
* [0 |; I% J. \+ n - da(g);//绘制底图
. z4 w& @4 i5 b4 G - t.upload();1 A h, l0 t) F3 V: C7 g
- let k = 0;
9 `6 v( r( Z& @ - let ti = Date.now();
2 J4 ^8 m( ?9 H$ p9 r4 C - let rt = 0;
& s/ m4 ~6 A; d! s - smooth = (k, v) => {// 平滑变化
' k+ L& h. j+ u/ b+ o8 m s - if (v > k) return k;
: h3 b0 X7 E l- _7 N# k$ z" l: i - if (k < 0) return 0;
8 O9 Z( W% P$ C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 v5 \! @! ]$ g# w, L3 n: P! L+ j
- }! B) e9 X" Z+ \
- run = () => {// 新线程* u0 `0 V. X/ ^/ |! l
- let id = Thread.currentThread().getId();3 b7 H4 g4 U7 r m, y- b
- print("Thread start:" + id);* m" U- _9 H9 h- ~0 ]/ C2 o! P7 ?' x
- while (state.running) {5 @# E* y+ ?! W
- try {0 A; q2 G) O5 x+ N2 n$ x
- k += (Date.now() - ti) / 1000 * 0.2;, k! ~) M( E2 J0 h+ r& g
- ti = Date.now();3 _% g. F1 C7 O
- if (k > 1.5) {
) u/ Y/ |# o; }' y, j - k = 0;
- j4 ?- j: W D% P0 _& c - } O' a/ ^, K0 c/ A+ h7 W: z+ ~
- setComp(g, 1);
6 N6 Q: r3 V9 L! ~ - da(g);
4 G! N6 q& b% t7 F- C) e - let kk = smooth(1, k);//平滑切换透明度
, d: a0 J4 W5 N. X - setComp(g, kk);# N& l+ R: t5 C. l5 K
- db(g);
% [0 y! u# k* y2 ~6 Z- h - t.upload();/ g6 y5 U. e' {$ R/ \
- ctx.setDebugInfo("rt" ,Date.now() - ti);' q0 W% n: K2 j; m3 H
- ctx.setDebugInfo("k", k);
( s9 N$ s, r. c& F - ctx.setDebugInfo("sm", kk);4 X K9 }) X) e" i- `* ?
- rt = Date.now() - ti;
, T7 G. |2 m. c, X: H* P - Thread.sleep(ck(rt - 1000 / fps));
' Q1 C$ f7 {9 a: L4 u' {) x- t7 {( S - ctx.setDebugInfo("error", 0)
- V& m# g0 B; L4 p9 |# |+ z( l) ?$ j - } catch (e) {
8 e$ r& u3 ?8 S3 l/ F, ?" |1 q - ctx.setDebugInfo("error", e);! K% u1 ?6 p ^2 a; K
- }
7 x8 D' |% \; D' m0 k4 i+ M - }+ T# J5 X9 V. y8 _- Q |; `% \
- print("Thread end:" + id);2 L" W! _4 b) h! h* B& `- O4 w
- }7 }0 ~! u4 L- B0 `) }% `' V
- let th = new Thread(run, "qiehuan");+ L8 C0 Q/ Q5 L: u; \3 z4 H
- th.start();
$ D; N7 V' F# n( C- z3 U - }
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F/ E( ^6 x8 H/ P1 M' m- function render(ctx, state, entity) {
+ ?6 y- L8 _- p$ ?8 y, N& l; i - state.f.tick();, x1 k# e! ?- f% @4 h
- }
+ S* ]" c0 ^3 O" N3 q) ?5 | - ; [. A' _- k# C. c6 k
- function dispose(ctx, state, entity) {
: ~: V5 M: w' v& o4 r0 r - print("Dispose"); }% J1 Q8 j. I# P" p9 C; F! s
- state.running = false;
7 B3 P8 f( u4 C$ x - state.f.close();; Q" [- s) q {: y4 N7 O
- }" g- Z# ]9 D; `7 k
3 E# ]8 x2 z" x1 u- function setComp(g, value) {3 o# f) G& [( a, Z9 S$ c
- g.setComposite(AlphaComposite.SrcOver.derive(value));' g2 Y8 J" S/ ^
- }
复制代码
& \4 k3 q/ X4 z* a5 O3 Z# T4 ?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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; D% ^& R/ i1 f% r' e5 Q, N9 H6 c: U7 }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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