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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。; P( d" H8 t5 i$ v% Q
- importPackage (java.lang);4 W. j) r! y. n* v9 e. _# e
- importPackage (java.awt);- L) C; n+ D* R" x9 B" U; C1 B
- ( v1 K, f# s, c! v# I% A
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 y* [ M: o& O
3 n+ P4 @: F( B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- ~0 Y' u0 X9 r - " g: o7 W) m7 x
- function getW(str, font) {
7 I( [9 K5 c6 V$ b1 _" G - let frc = Resources.getFontRenderContext();
7 K3 s- r, J; T- a6 }% Q, [ - bounds = font.getStringBounds(str, frc);* O4 w" X6 l. a6 o
- return Math.ceil(bounds.getWidth());
' W5 Y) S( Z" \6 M# Y$ m - }
, {4 t! g4 F: Q2 ~! o+ ~4 Z) d
( \% W9 ^# J, G- da = (g) => {//底图绘制
. c/ I5 ?! }5 b0 N. R, S" `8 m - g.setColor(Color.BLACK);. D; w! K, [6 y% q9 r8 R
- g.fillRect(0, 0, 400, 400);
2 f- w$ `) [9 Q5 ^* T0 h; u/ ] - }
( J, ]+ t: m ^- K5 |
) H* Q8 P" J$ |3 ]. A4 f- db = (g) => {//上层绘制
6 p |5 _" B4 k6 c3 ] - g.setColor(Color.WHITE);
* i4 E9 e7 [2 W/ ` - g.fillRect(0, 0, 400, 400);1 D$ x }2 a( D' ^+ p' c% D
- g.setColor(Color.RED);
1 y1 |4 K r/ J6 x - g.setFont(font0);
/ h* L7 V) O: E6 e - let str = "晴纱是男娘";
$ m' r& Z2 Z7 {4 ]0 E - let ww = 400;
" R7 v4 ]& w e$ j6 D - let w = getW(str, font0);, c* }( o, s! v: P3 C
- g.drawString(str, ww / 2 - w / 2, 200);
0 b$ Y- ]4 u' d$ a - }5 U( R" \- N# | [0 W
3 Q6 n; G4 a0 a1 x1 ?. W- const mat = new Matrices();
; D% S2 c" y( | - mat.translate(0, 0.5, 0);
0 I& Q$ [3 T$ U f
7 n$ b. Z* s: O' |- D, U- function create(ctx, state, entity) {" I6 v0 N8 g& Y3 A" l
- let info = {7 i1 D4 D% [- W6 ^$ [; o6 u2 S
- ctx: ctx,
" Q: A! {7 p( s - isTrain: false,2 R: v% B8 P0 l- Y6 a
- matrices: [mat],7 }: {" ^' A! O9 _% n
- texture: [400, 400],
8 M( f0 _1 I" C% \( B! Y/ d0 \ - model: {, I8 o4 `$ b* d/ e( n
- renderType: "light",- B' [% h( T+ [; i/ \
- size: [1, 1],
1 _, g q$ J( r6 _# [7 n" C6 r0 B - uvSize: [1, 1]
) ] Z4 G6 C4 P - }
" x6 [% o4 c1 N# z7 D - }* y& M& z0 a/ C% F
- let f = new Face(info);
# x N2 s6 n0 n0 I7 G7 g1 E( O - state.f = f;, Y. E$ g; N# A. A
- 4 o5 z/ ~9 q3 v9 g U+ g Z
- let t = f.texture;
; ~. N t5 m4 Y9 J( P - let g = t.graphics;, | h2 B& k8 L& C% N
- state.running = true;$ a% g% [: i9 t5 Q `1 O2 L
- let fps = 24;
, S. P/ }3 l) k. L8 i' |) n - da(g);//绘制底图
& k$ T6 c2 ~( y8 j - t.upload();
) r2 I+ v2 k% p; h" l2 [( i, S6 b - let k = 0;% {! T9 r( i2 k7 F; n; ]
- let ti = Date.now();
/ s4 j' `! |3 L3 N$ C - let rt = 0;
5 A% E$ G6 M* {" y - smooth = (k, v) => {// 平滑变化7 B9 Y$ G) e6 o6 k- X
- if (v > k) return k;1 y0 G3 ?( |. V# P7 W
- if (k < 0) return 0;
4 o! g; M* v8 `8 k( d- ]/ [ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 L0 }/ A6 W6 y% P/ I
- }
1 p5 J5 {. d0 @+ s - run = () => {// 新线程
+ K ^+ I- W5 r- [( G - let id = Thread.currentThread().getId();% Y: _) h$ o6 |( |
- print("Thread start:" + id);
% M" y, p0 M8 x) Q - while (state.running) {
6 s3 B9 `3 L, Y4 H& p$ f2 O( f2 h) | - try {/ a) w; r' z. X; }/ B6 K" [) Y/ `+ V6 h# p
- k += (Date.now() - ti) / 1000 * 0.2;
; q9 b, z* l9 m. N6 m `# W - ti = Date.now();3 e) v% y; ~) Q
- if (k > 1.5) {& O" B) j) Q. a. V, T7 u( d
- k = 0;
3 m, y( d6 Y ^ Z - }0 ~( f- {* [/ ^3 T8 c& U
- setComp(g, 1);5 }& ]# \; O' x. k# P& V- B5 I3 I0 H
- da(g);
1 l( J- k# ?* C B! w z& H9 E j. I - let kk = smooth(1, k);//平滑切换透明度
7 G5 P& W3 d9 m* M - setComp(g, kk);1 t9 P( U1 n( E7 K q$ }; b
- db(g);# v: x' G! C% x4 F! q
- t.upload();; _, D; ]+ e& f. Q$ C$ k2 g1 [
- ctx.setDebugInfo("rt" ,Date.now() - ti);- Y8 [! M0 q3 z; e
- ctx.setDebugInfo("k", k);' r5 t- s7 c! J# f, B, Q5 ~, G+ p7 i
- ctx.setDebugInfo("sm", kk);; Z" g8 T' w' C4 x" J; n$ p8 ~
- rt = Date.now() - ti;
( h! X5 A; d( r% I7 P; Q2 B - Thread.sleep(ck(rt - 1000 / fps));
; {5 ~+ ^* d6 S& Q - ctx.setDebugInfo("error", 0)
9 E% R# u* J: n7 H& t- h - } catch (e) {
z4 y2 X+ Y& w - ctx.setDebugInfo("error", e); d" q* f. E/ x
- }# x2 n9 A8 J4 _( o
- }
% V k7 l# ]2 }1 [) o- d8 q ~ - print("Thread end:" + id); I; b& e/ q% o6 {& C: C+ [4 [
- }1 B2 R' @/ N* c4 f4 b. y+ u N) o
- let th = new Thread(run, "qiehuan"); t: e- K+ ] e
- th.start();5 j6 u8 ~4 L3 y5 \5 h
- }& [( y/ z/ n& ? p
- 9 X1 u2 ]# v4 S' r
- function render(ctx, state, entity) {
7 X+ Q: {0 L; ]9 k- E( |5 Q% g - state.f.tick();
8 H/ V1 |: b( v: E - }
: S+ s9 C9 ]3 _ - 7 r# f. U }7 j5 ]- L5 w
- function dispose(ctx, state, entity) {6 i" ^/ Y8 m" \
- print("Dispose");
5 f, u z1 ~, {+ D. K: H - state.running = false;$ K t. z l7 o3 k& B$ e) \8 ?8 H# C
- state.f.close();
, e, y8 G; ]0 X - }& S \. L+ ]% r% n0 ?0 I
) Y9 R0 a( n' i3 j7 G2 a- function setComp(g, value) {
1 B3 P1 @9 o; Q8 m3 h. E - g.setComposite(AlphaComposite.SrcOver.derive(value));
2 f. @1 [8 N( n* l1 C" p - }
复制代码
: ]+ L% @5 E3 h- g* n* q j/ X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。% K" [* e8 W4 Z) U" i4 }% k6 Z
2 p; N) o. Z) q9 ]' @8 L1 Z
# }3 {3 o* M) R. h" q顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). W6 D" b1 C; Z# k. Q
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