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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。
1 C) j/ |3 u3 G9 b- importPackage (java.lang);
7 `$ ~& P; R) i* d" v0 e - importPackage (java.awt); y4 p e( l4 f. S/ N
- 3 M$ F0 H5 b1 p9 v4 Y
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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+ L$ q6 h9 X' V/ m: I- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);7 C' C; D- S( ~
- . l" R8 |" z/ A( G1 n$ Q
- function getW(str, font) {
& k$ b5 E. n8 z" H/ p% t3 R! c6 r" r - let frc = Resources.getFontRenderContext();
( r. A4 R; V/ i: J - bounds = font.getStringBounds(str, frc);" s. T/ s7 r: S! s$ A4 M' _8 c
- return Math.ceil(bounds.getWidth());
{0 L+ H; v! ? `% b - }! e) z$ J- X, ^4 z# _, o" T: I
! A, g# {. q' D4 ^0 q/ g! z- da = (g) => {//底图绘制7 e8 X- M. g; Y9 ^
- g.setColor(Color.BLACK);/ |. s. q) A+ W0 M
- g.fillRect(0, 0, 400, 400);
6 w' @% ?; q8 s* U+ u/ h$ T - }
1 e6 ]* t: W3 o& H7 l
6 u. T$ W8 {8 @- t9 C% Y; F/ B+ \- db = (g) => {//上层绘制# ?6 m" K4 L4 J0 R$ H, f; d- z
- g.setColor(Color.WHITE);
8 F1 n2 f W. _# \! V$ f - g.fillRect(0, 0, 400, 400);
& C' C! M0 v& g# ?' C - g.setColor(Color.RED);
3 T1 m8 K/ y& [' @0 O - g.setFont(font0);9 f1 D; ^1 @) }
- let str = "晴纱是男娘";
) G6 Q" h: a; W3 F' O9 f5 N - let ww = 400;2 V' g3 v6 W1 v
- let w = getW(str, font0);9 z2 l( o: n4 R
- g.drawString(str, ww / 2 - w / 2, 200);9 f5 u6 V; ?1 D I; t5 ^9 b y
- }
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+ i6 E. x. p1 v& e7 ^0 [% Y- const mat = new Matrices();4 W& K; I: m, v4 U$ h
- mat.translate(0, 0.5, 0);6 z' A: x/ K& g) l6 n
- ! q2 X! M% b' b3 e
- function create(ctx, state, entity) {
- Q) l; m' i* ]5 H Q - let info = {
" c' y' o" D! \. ~. X: Y - ctx: ctx," e( O& o! F% ^. m7 c6 N/ K
- isTrain: false,
3 }* M0 L! D, S- J' Q% J - matrices: [mat],' a4 T0 s/ B4 s+ ?( D: a
- texture: [400, 400],# @& v/ O" L% I
- model: {
7 {0 z0 n7 k3 F: {* ?9 i0 ^0 \) u - renderType: "light",
- E# _, c2 c4 F4 }- E! d1 e - size: [1, 1],
. M) {2 F$ L1 D; h% e6 V- p - uvSize: [1, 1]7 C+ y: s3 B: r e3 B& v3 t
- }
" M( w/ E4 j1 B' L( z - }
. }( H+ _4 s; S2 u: S - let f = new Face(info);
, B8 e' q* q* x2 S6 i5 S' V - state.f = f;8 r; D, j$ y5 O5 L& {
- 9 A2 ^( X- {$ {6 N" i6 q+ x
- let t = f.texture;* l0 v8 d$ N# j* C. o# E
- let g = t.graphics;) f+ ?3 a0 T( _& R
- state.running = true;
4 ]- e0 j4 ?- `* |5 E i# Q7 n: C - let fps = 24;8 c, Z8 m. I* c! S
- da(g);//绘制底图2 e l, s0 r1 B! F1 c
- t.upload();
2 O) u) O/ r, E9 B* V6 L - let k = 0;
+ s6 \+ }) X8 t+ N. ^: n - let ti = Date.now();1 r- w6 Y* S% I/ S: V; w
- let rt = 0;
9 P8 @5 x& S j& F1 a4 E - smooth = (k, v) => {// 平滑变化3 X$ ]1 x6 x D1 ~, k) p2 l
- if (v > k) return k;- X$ l( E, H& W: v! t& Q! C
- if (k < 0) return 0;
1 `0 I: R: z2 ~9 { - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;' Q& D+ }2 l, @. l
- }0 H5 y& _ q9 |4 ~
- run = () => {// 新线程
! A3 a' B! F6 n; @ - let id = Thread.currentThread().getId();2 T9 Z8 p( q5 [0 N; u! o
- print("Thread start:" + id);$ Z v, G) G' i! G$ }! c
- while (state.running) {
# _8 H- Y9 O! g9 C; S+ m - try {' ]! x( j) \ {1 M( y. J, X. F
- k += (Date.now() - ti) / 1000 * 0.2;
; _2 M4 q$ a5 y: A! c - ti = Date.now();
: _ \* ~3 x N! o+ K7 ~5 E - if (k > 1.5) {1 q, K: f. R" E" ^# l; \( ~
- k = 0;: E+ x1 Y: Y3 ]1 b8 m! @" f3 b
- }
+ `1 m6 }5 ?4 F - setComp(g, 1);
" b4 \, B4 Z) | - da(g);# c. P* g) O( c- e, D7 O
- let kk = smooth(1, k);//平滑切换透明度. N' g* X- E0 W
- setComp(g, kk);
% b6 V8 @0 v0 n( j - db(g);
) H$ r! ~0 Y) E* t" J, G' K - t.upload();! B* w+ o7 m: K* x
- ctx.setDebugInfo("rt" ,Date.now() - ti);9 t0 ?& y) n* B( r
- ctx.setDebugInfo("k", k);
2 d- d4 V. t% x8 t$ v4 [5 M# W - ctx.setDebugInfo("sm", kk);5 L M1 H! \+ L" E$ U6 v
- rt = Date.now() - ti;
+ \/ p( D8 g: { - Thread.sleep(ck(rt - 1000 / fps));# ?$ A$ ?) f3 O
- ctx.setDebugInfo("error", 0)
! {* d$ S- M- F3 Y& t: r - } catch (e) {- K/ f% o) V- n
- ctx.setDebugInfo("error", e);0 Q6 |7 B) ]! y7 g
- }9 |, O( W* A" H' h
- }( |! O/ P7 }( [' J1 t+ A9 j
- print("Thread end:" + id);+ @' p# p8 Q. R- ^/ J& s
- }2 P5 n# m" m* j1 U, U
- let th = new Thread(run, "qiehuan");
- G/ x3 j9 c7 s, X% B, r E1 g - th.start();
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- 6 [2 g9 ~: k3 u. L1 u
- function render(ctx, state, entity) {
" h8 l/ O( t9 r; O1 E( P2 g! C- s$ ] - state.f.tick();
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+ a2 Z. B L6 q" H- function dispose(ctx, state, entity) {
% G' p9 y( P2 |; \. f3 r8 a( @ - print("Dispose");' c+ ?2 `6 O3 I _
- state.running = false;( Z; f: g. G E0 b& S
- state.f.close(); u* E- t x: m0 S4 z1 R4 h
- }- _* D0 R$ B# ?
- % v) z8 ]; y5 |5 G8 c' G, y- N
- function setComp(g, value) {2 f1 g* v$ A; ~& Z* N* K% H5 P# M
- g.setComposite(AlphaComposite.SrcOver.derive(value));
: X. T2 u* @7 V1 O4 p - }
复制代码
- \) L% I4 L' W& }% v7 m9 j; @( ?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。+ L f1 z9 r6 Z' e$ u. B- z
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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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