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& i/ c: y. E2 u; I+ ~1 x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。
5 A- C+ E' d6 ]6 Y" B: w! K- importPackage (java.lang);
) Y! w+ w8 B% B1 f% Y9 i# C. V9 y - importPackage (java.awt);
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4 N" B3 Q/ P5 b% a- s" o- include(Resources.id("mtrsteamloco:library/code/face.js"));
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) A: B' I ^: M0 E w- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; ?) f" j% @2 e$ z* e0 c
5 u: C/ C, Q' y- function getW(str, font) {5 i! J* p( j" p; H" X
- let frc = Resources.getFontRenderContext();% ~# X; \% A& p5 x4 U7 e) v$ X9 ?+ ?
- bounds = font.getStringBounds(str, frc);% S) I- K* W# J, S2 I
- return Math.ceil(bounds.getWidth());5 N7 u: L& a: t
- }
- ], z# l* r# |9 X8 } - 2 C4 D3 ?; w5 m6 \- A' U
- da = (g) => {//底图绘制9 M5 k$ P: c8 p2 `1 c% `
- g.setColor(Color.BLACK);
1 z7 f& N# s: k) B - g.fillRect(0, 0, 400, 400);
4 ^; a" @" H- {" [4 d l3 i7 i7 d# b - }
* E6 M) s- f' b( ]6 c - ' A6 N: e1 p! s0 b
- db = (g) => {//上层绘制- w& @& l; k$ }9 k/ z- |# U- ^
- g.setColor(Color.WHITE);
# p% K. w* M8 i% F - g.fillRect(0, 0, 400, 400);; [8 \/ I) v4 P/ d/ Y! p0 F0 c
- g.setColor(Color.RED);$ g9 @# K5 A. I7 N3 |* b
- g.setFont(font0);
, r2 v2 W4 l+ C2 c; p- z- g( N - let str = "晴纱是男娘";' A( _& t W9 a$ z' b
- let ww = 400;
5 {* G, t9 C& `" u& n4 U3 R - let w = getW(str, font0);5 D( ?+ ?& o% R" J
- g.drawString(str, ww / 2 - w / 2, 200);% V5 m7 H1 p3 k) M9 Y5 V
- }
0 M& N6 s& }0 S1 }! t; T* N - q2 m; l$ L- w* X" h4 r* @) {
- const mat = new Matrices();7 p! N0 c! c0 }* p3 X& b$ Y' W
- mat.translate(0, 0.5, 0);0 _7 |+ i1 Z7 |2 M. W( b" U, W
- " u; Z5 v& p+ i: u9 V, W
- function create(ctx, state, entity) {# i2 b! n* ^3 H$ Q5 T
- let info = {* A/ l6 S9 @; b
- ctx: ctx,+ y0 l" b: I6 `/ E2 g' ?: Z
- isTrain: false,
$ L+ Z# l8 p; S$ c1 h0 }# A - matrices: [mat],
/ ~7 y, ^) k: w& Y- D% r - texture: [400, 400],
c7 d+ [ q' s# W! N$ k3 ? - model: {
- ?: ?# g# \' Z. N; @# h+ G# P+ b - renderType: "light",/ E; f2 N, x+ V1 O5 O
- size: [1, 1],
, V# T S" h; d - uvSize: [1, 1]
; K9 T" k% m0 C; o9 c - }
' [2 ^5 P+ m3 Y3 r6 y* W - }
3 n1 `. f2 I5 T0 v) | - let f = new Face(info);( m* w d ^6 b0 H% C6 a6 J
- state.f = f;
7 R4 L6 z: y7 G3 @' Q: T
% k, A+ B* ~- b2 R- let t = f.texture;+ K9 S, U* h( O( M
- let g = t.graphics;
* Z3 T/ X( r) j! ~- F - state.running = true;
9 X. z4 {; r& i; Q - let fps = 24;0 S' t, g: g2 g% V( e
- da(g);//绘制底图+ I1 w+ {" X" r1 }4 ?, q: M0 w% ?: g
- t.upload();
+ k4 t/ c7 a. E/ @& h - let k = 0;, C- ]4 ]5 `3 R
- let ti = Date.now();
5 N5 O) Y( a W& ]+ G: t4 A* c6 M# @ - let rt = 0;/ K( \% Z7 S* B" l5 {6 _
- smooth = (k, v) => {// 平滑变化
8 D: D& p, l( ~: w e - if (v > k) return k;
( n" A4 X$ h$ R$ B0 I# K - if (k < 0) return 0;
1 r" y2 j1 I) h/ `/ r5 Y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;3 u d, C% ?- p; ^# |6 H
- }
* v) O+ q% T9 L& |' r# X, T; } - run = () => {// 新线程$ M$ l( C% e e1 {6 C
- let id = Thread.currentThread().getId();- z1 W) X- K$ w' _+ Z/ _! n% ^" h
- print("Thread start:" + id);
Z2 G& X" o# |' d0 x - while (state.running) {
7 x. V! S# y$ K" H" | - try {" M3 h0 ~" B( `2 @) i
- k += (Date.now() - ti) / 1000 * 0.2;
. @3 b' X: x( J8 r- Q$ g - ti = Date.now();
( O Z1 `; z: g+ } - if (k > 1.5) {, i' [3 S- X5 j9 n% j- b n
- k = 0;8 Z% q* B1 N5 Z) p
- }% O0 z4 Y7 d/ f/ [7 d
- setComp(g, 1);8 E5 V: |* a* B
- da(g);
' V, E2 n% @" ?5 l# q2 x% e - let kk = smooth(1, k);//平滑切换透明度
+ Y; S* D3 r" p - setComp(g, kk);# t4 e) f8 _1 A$ |% O+ t: m7 D: [
- db(g);6 ?6 N, _9 u) k# ~
- t.upload();
4 N, ~& ]- Y2 @# o' L - ctx.setDebugInfo("rt" ,Date.now() - ti);! x( X$ g0 D- H" _
- ctx.setDebugInfo("k", k);
% e5 k3 n) P/ d% W& U - ctx.setDebugInfo("sm", kk);% L, _+ u s( @7 k' p2 Q, ]4 b
- rt = Date.now() - ti;
0 M0 L U! N1 `( O& J6 _' H' P - Thread.sleep(ck(rt - 1000 / fps));! P1 U: J$ u: U4 E1 I0 S! L
- ctx.setDebugInfo("error", 0)2 X3 _4 g; L$ |4 J
- } catch (e) {+ h$ X* |& F2 N0 q v7 f
- ctx.setDebugInfo("error", e);
, f4 c1 g A9 i6 U/ p - }
- Z8 h' ^, t7 ]6 e - }+ N6 c% w8 t, W1 ~
- print("Thread end:" + id);% k* T& q3 T X5 R$ I! i# e- d6 \" N
- }7 N, \4 x* H" k# q
- let th = new Thread(run, "qiehuan");8 N$ S; G5 y8 L z8 ~
- th.start();1 G' l6 D4 C6 D: q- O J' m
- }
+ P, a8 D- h$ `& f$ J& E7 N
3 Q5 t, a4 o( h& }. Z( A& L+ L- function render(ctx, state, entity) {4 t1 x* \6 }5 j @# i+ G
- state.f.tick();$ D8 ]% h) O: W4 ^- y+ d. Y
- }& `. h U% O4 W
9 Z& [" ?, J6 X5 h+ y- function dispose(ctx, state, entity) {
' N4 e( T F# Y v# k - print("Dispose");
* t: d% a5 R% c P1 k9 Y, u& _ - state.running = false;
+ y1 V/ q# [1 |* K- Y* \9 c - state.f.close();
& j0 `! O; v# s# i6 Z2 j - }
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- function setComp(g, value) {
8 H9 T3 ^6 ~" Q& g6 Y! b - g.setComposite(AlphaComposite.SrcOver.derive(value));' h& C" Y& H! v
- }
复制代码 7 l/ b _: F6 r* m5 m( l
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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8 Y7 s8 k! ?1 c/ T' a: j$ r _6 C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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