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2 s( Z# J0 k9 |4 [& A. s% m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。& [: }! X. [# t E( A2 L
- importPackage (java.lang);9 T5 W3 Z4 @) a& f$ k9 |* q% p
- importPackage (java.awt);4 T: e. D0 O5 B# i9 Q
- : |% D% t, f$ @$ ~
- include(Resources.id("mtrsteamloco:library/code/face.js"));0 {) G- I# x+ w8 ^# j I1 q+ p( L
1 u! G- u0 }/ R" c# e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 t9 X. x/ v$ P! k3 y" b/ r
- ! D3 d! I P0 ?: N2 ]8 L
- function getW(str, font) {
& J$ r D, V- d' V7 [( c: N - let frc = Resources.getFontRenderContext();1 o9 G+ ^+ n: L3 c+ r4 R5 o
- bounds = font.getStringBounds(str, frc);6 |2 Q! U: o& U+ W w
- return Math.ceil(bounds.getWidth());! r* J: [! z/ o g. B% }
- }
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$ F$ `) r" ~; I' P" F- da = (g) => {//底图绘制
* r& _$ Q, E7 W- _# I - g.setColor(Color.BLACK);3 k7 C+ {- R8 L; Z) P6 ^6 R5 q2 f
- g.fillRect(0, 0, 400, 400);7 \2 u* j' i5 ~( X. Y" l# ~5 p; n
- }' E2 G0 m" L8 m$ q* c; v) K3 |* t0 ?
- " w# z3 `0 |# t( S! `2 }
- db = (g) => {//上层绘制# m3 Q& M6 q v' O8 Z# \3 W& N
- g.setColor(Color.WHITE);
$ w$ Q6 ~; r2 Q5 ?1 G - g.fillRect(0, 0, 400, 400);+ s9 F( H$ i' F: i( P2 Y* i- J9 w
- g.setColor(Color.RED);
' R. E; T7 D+ g: p. @0 s - g.setFont(font0);) ]; Y+ y. ~% u% Q' m+ P
- let str = "晴纱是男娘";
% \) R( j/ _% u. y3 i3 p0 h: d5 v8 z - let ww = 400;
. z7 U1 q: L/ Q+ e( { - let w = getW(str, font0);
3 a$ u# k7 G8 \% L+ } - g.drawString(str, ww / 2 - w / 2, 200);
; K6 \8 Q/ c8 ~: q* _ - }
. N0 x- @9 K T- \ - 2 b a& ^7 j4 b
- const mat = new Matrices();4 Z$ U. `1 R6 [" A
- mat.translate(0, 0.5, 0);& |6 L0 i, v& R* t
- 1 c0 w; P, H) `, o
- function create(ctx, state, entity) {
o8 U: s9 t0 ^4 Q7 }# q# L - let info = {
2 g* m: B) b3 s3 @& \$ p - ctx: ctx,
! o! K& o; r K$ ?. [; c3 [) M0 K# l - isTrain: false,
( _, c# e+ A" C - matrices: [mat],
- w! {+ z P+ ?/ m& K# M - texture: [400, 400],
, }9 G/ S/ |. ], e- E0 K - model: {. K0 z- O) I1 t1 u, w L
- renderType: "light",
; j/ j# t& `- z+ N. ` - size: [1, 1],
0 w( ^$ W. r( v# I( Y! f- i2 X - uvSize: [1, 1]% U+ F- T6 z+ E; |/ M4 W W
- }
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- let f = new Face(info);& w* H8 @5 Z2 {4 B+ _
- state.f = f;
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- let t = f.texture;
- A7 s2 F: r3 K/ a4 _ - let g = t.graphics;7 |* q9 s- X, I" |0 p$ g f
- state.running = true;
( E, K$ X! M) A$ V. `" H - let fps = 24;2 |4 M9 D! L+ T1 r! R
- da(g);//绘制底图
- q& G& o! ?2 Y2 q7 y. j4 V - t.upload();
" `: H2 n0 q3 a1 t/ L - let k = 0;
( f8 @5 c4 [) Z4 I- d - let ti = Date.now();# H; h: v T- _+ Q$ |6 s, Q
- let rt = 0;
% v, S( e- y: b3 [2 N3 p6 @8 R) R - smooth = (k, v) => {// 平滑变化# q# d+ b: V0 R
- if (v > k) return k;
j) N% N6 B1 V" ~) x. q - if (k < 0) return 0;
4 v0 ?; g! }8 J8 _- `- O - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
0 n( C& `; t$ A+ z, N! T - }
8 A1 _' w. C/ u8 t: J: Z, L - run = () => {// 新线程2 O' `) y( H @0 P4 n& Q" w& [
- let id = Thread.currentThread().getId();( P, m) T- V8 ?4 b" l u
- print("Thread start:" + id);
8 q3 R, M4 w. `& b1 x* f6 I, ^+ j" x - while (state.running) {" [0 z: B8 b# ]5 ?/ m6 q' g
- try {1 s3 K3 G6 d0 W/ B6 x" E& L2 I
- k += (Date.now() - ti) / 1000 * 0.2;
+ v- u) X/ e! h - ti = Date.now();
/ `2 `: i& H" w- q$ K' ^ - if (k > 1.5) {
+ i e' X% a* v3 I% I4 U - k = 0;; K- n4 c3 t" X, t, E
- }
( G1 k$ u- Y, Z$ ]% V - setComp(g, 1);
- z4 }2 \: D l+ j& ~- F - da(g);
# N8 k$ k, W9 K. W, X9 J+ P# b* r - let kk = smooth(1, k);//平滑切换透明度
B( ]! r2 F4 P - setComp(g, kk);
9 P& F/ E) ?! n( n) P0 S, X" i% B - db(g);
5 Z2 r+ i' L# ^ - t.upload();
4 p! Q$ L& {, J8 @) i2 ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 y M# ^$ h; k7 j - ctx.setDebugInfo("k", k);
1 a# m* o0 u! a+ Z8 P2 f - ctx.setDebugInfo("sm", kk);5 f8 A3 c4 m2 M6 P
- rt = Date.now() - ti;6 \0 ? r( M8 M6 K( v! v9 R/ F( V
- Thread.sleep(ck(rt - 1000 / fps));
( T) @3 M4 S6 f8 T - ctx.setDebugInfo("error", 0)
! i8 i8 ]* L2 i - } catch (e) {
( c* K6 g$ u9 q6 O - ctx.setDebugInfo("error", e);
: p& u! W0 K2 n6 x2 _1 r2 N - }
5 V% N% I- `9 V" M - }
1 w& Z) O8 u) t4 W - print("Thread end:" + id);
5 @6 }8 g9 i& f; G - }
) J& x) ~& P9 m8 u# Q! ^ - let th = new Thread(run, "qiehuan");. h& ~6 W: v [8 Y8 G9 L0 K
- th.start();( {9 Q6 h3 g3 a6 }& c* \& M- d9 F1 j# a
- }( n+ z1 O8 ?( \( M5 `5 Q
- & \5 E8 x1 ` b7 R
- function render(ctx, state, entity) {
$ W: X( u7 a& o - state.f.tick();
$ D2 |, K4 y( Y4 Y - }
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- function dispose(ctx, state, entity) {
, G0 C% L4 E+ V' _ - print("Dispose");
1 V9 n. J" z. Y: M. n - state.running = false;6 _! t/ @: ]; z% h2 x0 g
- state.f.close();
4 R+ {( R4 t: v1 n! w* Q. M3 j& B3 N - }% R4 K+ X' r4 ^2 h$ R- H6 S: c+ P
" }% z4 A O5 ]( }- function setComp(g, value) {
/ l. v9 m' U( J# m! ^8 q - g.setComposite(AlphaComposite.SrcOver.derive(value));& U8 r0 _5 X2 @7 C: Z) |. y: z
- }
复制代码
. W1 J7 ~' N3 k. V. x* }5 B- I0 g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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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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