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- G4 s7 g/ l' Y! f8 A) I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。; \. l2 E& y# Y
- importPackage (java.lang);
- m6 M/ a+ r( y3 q - importPackage (java.awt);8 [( V8 n! _, J7 G; g* _0 V0 s6 _
- ' P9 I8 P M4 J- v! ~5 B
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);6 o: m6 |7 ]3 D
% t1 {! T; m1 \- D- function getW(str, font) {
7 ^* f. V4 Y; ]$ G5 V - let frc = Resources.getFontRenderContext();
1 c; u6 E* x; b - bounds = font.getStringBounds(str, frc);2 Q5 ^- V- F" e2 u
- return Math.ceil(bounds.getWidth());# y7 N, H; r1 B1 Z5 c6 }6 V
- }! \1 i9 `9 e% e* ?
0 Z4 J3 B& H0 B* r' _0 U s* V- da = (g) => {//底图绘制: w' o8 ]7 }$ u, i2 s0 _! e
- g.setColor(Color.BLACK);; t8 ~; O* F; Y$ v8 i: M
- g.fillRect(0, 0, 400, 400);( m; L" X5 e% a* I$ {- t. ^
- }' _: E0 R3 ?1 b! N" U9 W
- $ ~ N, o+ W4 L: M, O+ I6 W. J
- db = (g) => {//上层绘制
8 a7 r0 F) o; G) g: Z" B8 l. B6 P - g.setColor(Color.WHITE);" p1 S# ~' G: j" k: p6 y3 u5 O) ~
- g.fillRect(0, 0, 400, 400);
6 m! \* c# a6 }) J6 p5 u' j - g.setColor(Color.RED);+ e# n" B# y0 x- _+ J
- g.setFont(font0);
# i$ @% h2 d3 {. U& f* B, C - let str = "晴纱是男娘";
# Y; b; H7 Q! @5 M& a8 F - let ww = 400;7 D+ {4 A# |' {8 n' \9 g* I6 C) A
- let w = getW(str, font0);4 }5 x- u ^# p4 h! W2 W
- g.drawString(str, ww / 2 - w / 2, 200);
% K" ^! q5 n& H) ] C. U+ ] - }
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- const mat = new Matrices();
' i! M6 o7 v% I1 u1 A, o7 { - mat.translate(0, 0.5, 0);& D& q: b9 l6 V( h
- / r/ f* Q' i" {) _3 J% G
- function create(ctx, state, entity) {: K* ?6 }% O" y+ q1 z" t$ b
- let info = {2 E, Z# n! ~0 A8 [& M/ B
- ctx: ctx,
. n3 ^' @8 k8 O) e& t A6 R5 ` - isTrain: false,
5 H$ p0 o* l+ i- u. l& ~ - matrices: [mat],- Z0 r7 l- k% h5 Z8 p! [
- texture: [400, 400],7 i! w! J2 K& l3 ^- L- o% x
- model: {
. F) Z; B8 T: l" u- u% L! ^5 u - renderType: "light",( H) A' v0 s. ~" a5 L1 k1 Q
- size: [1, 1],2 A/ T! C, }7 K0 q0 s
- uvSize: [1, 1]' u) y( k+ k2 Y3 x* R& F
- }5 }. b+ Y9 U6 j
- }7 [, U( A _0 V% s: o3 v4 E
- let f = new Face(info);
0 Z: R% J# f$ l* t - state.f = f;
2 n6 E, g- N4 G. H' W2 T# {' U" l - / z0 M2 I' T9 N- h2 ?$ T! V* p
- let t = f.texture;9 P8 a8 R4 w; l2 i2 c$ o
- let g = t.graphics;
# Z- s2 l9 z" m8 |8 @6 s) w - state.running = true;
4 {( Z: w/ g+ ^" n8 L. }7 T - let fps = 24;
' h- x& {4 o! C - da(g);//绘制底图
/ w0 }: f" \- W$ O0 Y - t.upload();
; L2 d+ w9 x. X( q4 ~- H/ \' H - let k = 0;
; R+ n$ K! K \$ d - let ti = Date.now();
3 |0 C, ^5 M2 {5 | - let rt = 0;' b! B" u& y( K0 q
- smooth = (k, v) => {// 平滑变化
6 \$ c4 {2 U" F6 |! d* A - if (v > k) return k;3 S) a4 m- C$ S! }
- if (k < 0) return 0;
; s$ |7 y$ y; ^: I( d" T0 s5 N7 C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# J6 G; ^" r2 Z! {
- }
7 q N! i, N- s1 G6 I4 v - run = () => {// 新线程9 N! s! t% E' m9 e
- let id = Thread.currentThread().getId();
6 ^4 z M+ h5 C3 W - print("Thread start:" + id);
, G& u4 t+ m( I3 { - while (state.running) {
& o8 j* ^+ M' ?* I& l# ^ - try {
2 P# C7 x8 F3 b7 x# U* m - k += (Date.now() - ti) / 1000 * 0.2;
6 A( V# h: M* j* _$ p2 g. V - ti = Date.now();9 C i8 A0 `2 P1 Z
- if (k > 1.5) {
2 J) E8 b( o9 g7 |- A# x% l+ f$ o - k = 0;
: {6 W1 O! j5 l - }& C( c, F2 k N2 x: u* ]
- setComp(g, 1);' X: c0 T1 [" Q
- da(g);
9 i( ^$ Z4 d; Q: `& U0 d6 X, k - let kk = smooth(1, k);//平滑切换透明度
+ P/ V: x: S. E( M& y/ Y - setComp(g, kk);+ J1 e, I9 C) A, f% U
- db(g);( T0 d7 ~$ w! O# ?# w
- t.upload();+ r" c7 P. M- E- g- j m
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! [. R. @1 k! D5 }# f" H% T - ctx.setDebugInfo("k", k);
. a$ Z) d9 g1 S; s - ctx.setDebugInfo("sm", kk);/ J0 I# O. [* A& P0 W6 y% _. d- ^
- rt = Date.now() - ti;2 v# U5 Z% b+ e( ^
- Thread.sleep(ck(rt - 1000 / fps));1 E/ \. L( V5 P0 M$ k$ Q+ \& v+ f
- ctx.setDebugInfo("error", 0)
1 Y1 Y- k$ `8 r* z: g - } catch (e) {9 e: F6 ~) r& m! |2 |% Z
- ctx.setDebugInfo("error", e);
5 t8 }- r7 q6 P! @7 d, n( G; u - }
& ^9 @# T+ ^* @, M% n/ X! r - }4 L0 L, V4 w$ U0 U, {
- print("Thread end:" + id);
( F# [/ O( b+ ^; H2 {! q( ? t - }) ~2 n* S1 N6 U' \* ^
- let th = new Thread(run, "qiehuan");
( ^% A# s: ]+ z& g - th.start();
6 l) Q' X( [1 ?& Z) j: T5 y - }
, e+ X% T6 o' ]$ ?; S0 {' ]
: ^( L1 I+ i2 D( }- function render(ctx, state, entity) {
& q Y2 J% z# ?1 D+ y - state.f.tick();
/ F. e- ?6 c2 x! g" Q5 Y - }
- R( G$ p3 n5 p/ G6 K* q7 k - : `; N1 _5 D9 H8 B- R
- function dispose(ctx, state, entity) {
9 x7 D9 g @- E9 @ - print("Dispose");
5 R+ j% l) L2 m4 x' \! t - state.running = false;" ^& J1 Q5 ]2 R/ _: X, W$ q( [
- state.f.close();
$ i7 }4 i' e7 g" O9 n ~( J" ` t - }
T' g0 {9 a3 w0 J( Y
% P* Z8 a+ z; s; N- function setComp(g, value) {
8 T4 R' \; T2 W R - g.setComposite(AlphaComposite.SrcOver.derive(value));
- w0 {' f- V) v/ T6 D - }
复制代码 7 N$ R, E! _/ G' Q- D
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。5 i: o. F$ z" `( S8 [+ y2 ^
1 W ], U6 o, ?, D8 F7 n" X
" c2 J: U$ }' ~! h0 r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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