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* m* L$ Z& m! a$ j" w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。
# n' \) q* { d3 x6 q- b0 A- importPackage (java.lang);9 A5 q7 I: S* K, z
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
. F9 U( J! y4 J
3 r7 Q8 J4 q% ~9 x4 r; J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
- r R+ y2 {# f8 K0 n
5 f. _2 i% S+ X. F6 ?- function getW(str, font) {
& e. I; x& A1 i$ {9 I6 r- H, k6 A) } - let frc = Resources.getFontRenderContext();( I; @: u$ g2 e, [4 \8 a
- bounds = font.getStringBounds(str, frc);
6 ]1 N A; M+ z - return Math.ceil(bounds.getWidth());: W/ T( F! }$ D3 {
- }5 y s4 d$ z+ M( B+ H7 o# G
" s" W9 k: O- C q- da = (g) => {//底图绘制
# q# {! ~- T5 D3 V2 r8 H - g.setColor(Color.BLACK);! c, X: v, z2 w$ I L8 z
- g.fillRect(0, 0, 400, 400);
! i' \' x y8 d8 @ - }- @; \5 @+ v. F% Z* `; Z0 N7 u% X9 b
1 g. M% a7 D3 M5 y. [) a- db = (g) => {//上层绘制( j! \8 m$ j C
- g.setColor(Color.WHITE);
/ e; K, V+ F1 L" c3 |% ] - g.fillRect(0, 0, 400, 400);
9 k0 c6 W" p% k- c - g.setColor(Color.RED);
8 P5 S9 I& D1 A5 g. } - g.setFont(font0);# u1 B6 f4 d6 O) p* A
- let str = "晴纱是男娘";4 l/ |# D# ~6 y+ M: w' J _
- let ww = 400;# g$ T/ H, r3 O+ T6 I
- let w = getW(str, font0);4 x' Y F- B$ o/ Z+ B
- g.drawString(str, ww / 2 - w / 2, 200);- g3 L: n4 h, q% s( K7 x0 J
- }
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. u& q# [, j+ V1 ` [- const mat = new Matrices();
& W% Z2 a( N0 N0 B+ S9 r" E) U( J1 \ - mat.translate(0, 0.5, 0);3 ^, s* Y+ o' a" E0 k. C
: S8 ~6 ^( _6 P& @3 g7 z- function create(ctx, state, entity) {2 `# H5 Z4 }8 V0 Q
- let info = {7 _$ f$ d& f0 h) N" ]+ S
- ctx: ctx,) J, a$ M- {( I/ ]# I3 c
- isTrain: false,
5 s u) H! U* L- I - matrices: [mat],
9 K, v+ W) t9 B0 q0 \ - texture: [400, 400],
& X& J g0 G/ ^. R - model: {: G0 M' d! u5 ]1 p4 t
- renderType: "light",
# j9 G$ O- U! J, t - size: [1, 1],# X T9 q5 z" V" I" W) l4 v
- uvSize: [1, 1]% `/ ~( @5 h! j$ y' {" h$ e z
- }
4 S [" u5 T/ Z& O9 E3 L; V) [ - }
5 k! Q) F2 j/ v8 T0 q% U7 T - let f = new Face(info);
6 g& |" k; s& n2 L- ~/ n$ N8 r - state.f = f;- y# [( x' e' J# m2 L& b6 w" D
- ; O- }2 p0 R2 H! H$ }* ^2 j# ?
- let t = f.texture;
8 P, C) X5 r* F5 F2 ` - let g = t.graphics;! a8 A8 y h6 }2 W( t
- state.running = true;# i% Z5 X9 I* r/ t1 A: @
- let fps = 24;
/ U `- A+ c3 q - da(g);//绘制底图
t2 Q& }" z0 \5 h4 F - t.upload();* D1 v4 O) I5 _/ _5 a7 y% U
- let k = 0;
, Y4 ~1 j8 f0 p - let ti = Date.now();0 D. ]7 a: L8 z- r/ \( z! {
- let rt = 0;6 J, d: [5 @; m- q" e
- smooth = (k, v) => {// 平滑变化
" c7 T o l5 I+ ?) I7 b1 _ - if (v > k) return k;& o3 }2 A( [* X6 n
- if (k < 0) return 0;9 ^* q/ H6 r" [! E" I6 a+ h
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;& r' T" Y! y& E( V! t0 r
- }
K" A( d$ V) T n - run = () => {// 新线程
{* L' K7 g2 q3 D9 ] - let id = Thread.currentThread().getId();
2 A8 q' U* c4 Y. N! H- S - print("Thread start:" + id);8 b- B$ y4 V2 t0 J1 T3 @: B
- while (state.running) {
1 i% g2 ~* M( J% |! u& o - try {
' J3 ?( @! u( E7 k9 _+ i) G3 m - k += (Date.now() - ti) / 1000 * 0.2;
; m+ U, A b3 Q+ G' Q9 S, \ - ti = Date.now();0 i4 V& y" |% ?/ k
- if (k > 1.5) {2 x9 V; c: l1 u) [5 z# i) {
- k = 0;
% a, ~" h- i1 z+ C - }
3 x/ [1 a( h( U- m - setComp(g, 1);
3 T P* ] @8 _. }* x - da(g);
9 h; R, [! k6 o8 ]0 G, s) G - let kk = smooth(1, k);//平滑切换透明度; J0 i. W) _7 x5 V- q
- setComp(g, kk);8 G3 o- c C9 X% c8 B# q! g8 V
- db(g);! N( d0 [+ g$ y- x; z# C
- t.upload();
, Q1 @; o7 k; W! J) K! }* @! ] - ctx.setDebugInfo("rt" ,Date.now() - ti);) m4 n! C8 {0 Z0 L
- ctx.setDebugInfo("k", k);
R0 N) c; k7 o9 X - ctx.setDebugInfo("sm", kk);
6 O# y+ @. ]( h/ E; y - rt = Date.now() - ti;
0 P$ T5 e/ v$ B7 h5 C+ P; [ - Thread.sleep(ck(rt - 1000 / fps)); O6 p4 N) A! Y& x) M* T
- ctx.setDebugInfo("error", 0)
. m4 ]9 B/ A3 G) S - } catch (e) {
' L/ |) J# `" Z4 F5 k8 C6 ?2 q - ctx.setDebugInfo("error", e);8 i3 ~* c6 D0 s* l7 H6 q- H
- }6 ?! E6 J" k) x
- }
' J% ]5 \! \' W" c5 \& ?: c" X - print("Thread end:" + id);& R c. F6 b Z: X$ D
- }
4 k3 b: Q& n2 J) G { - let th = new Thread(run, "qiehuan");
* S+ g: C* B" _8 ^7 R% w9 ^! U# L - th.start();
@% e* D9 @' r# e/ K% w' I0 [2 Q5 { - }% U& v' a G. G0 N* a
- C! b, d5 j0 U c B5 N
- function render(ctx, state, entity) {
! H/ P W! F+ v5 w- q1 S - state.f.tick();
5 u0 B" k- |5 x* x" `, W* @ - }
i7 @: w1 u t9 C9 Y5 ~
' f! E$ R" s- S; `2 i$ ] ]- function dispose(ctx, state, entity) {: e1 Y) u/ E' |. c
- print("Dispose");- y; w! [' z6 P7 {" M8 ?
- state.running = false;' n: O% J& w. j* V' ^+ O5 N8 i
- state.f.close();
: ?6 Z8 f' @* A* E, V - }
& y" E9 @# P( Q0 D6 Q% A/ P% N
- L6 k3 A, G$ M v9 [. M- ?- function setComp(g, value) {7 P, I3 ~" P: K |; l
- g.setComposite(AlphaComposite.SrcOver.derive(value));! q3 n/ I W1 X" d6 G. O; w% K- ^
- }
复制代码
5 ^0 }8 h: {" f8 ?2 k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。3 Y$ _0 d+ q7 j* F, p
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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)3 _' j) C9 G& x3 F g1 V( j
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