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. i0 ]; \" s( r; k" @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: G! a. s- ~
- importPackage (java.lang);, k; R% W7 M3 I0 Q4 K
- importPackage (java.awt);
# `; @# ^$ H; z% q
o6 _" z3 ^1 {" r- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {# J& n" F [( U" e' c
- let frc = Resources.getFontRenderContext();
# [4 \- z$ n. G! \ - bounds = font.getStringBounds(str, frc);
; n% e# o$ c! c" @6 c; }3 E& e - return Math.ceil(bounds.getWidth());8 V* ~5 M+ r" C% G t2 J N
- }
4 M4 E0 n9 b) A6 w9 r/ m' ]6 [
1 S$ ?5 A w- ]. p" w8 H. N- da = (g) => {//底图绘制
) V2 b+ j! q" U( H' T# w" @ - g.setColor(Color.BLACK);# u; O# _! e9 p( V# w5 a0 X T% ]
- g.fillRect(0, 0, 400, 400);
# u- Q0 k1 F; M) ^ X - }: {9 l2 D1 h0 O7 Q, C6 v
" u8 A7 ]) [+ A' N- db = (g) => {//上层绘制. c' |# _7 E o+ o( f& {! K
- g.setColor(Color.WHITE);
' H- n! L, [6 r1 ] - g.fillRect(0, 0, 400, 400);5 I U" w! |+ S( K6 Z: F# {0 }
- g.setColor(Color.RED);
+ {% C4 ~4 S/ K Z% J! P9 d - g.setFont(font0);7 v1 a1 x7 `0 z8 b3 p7 ?8 e
- let str = "晴纱是男娘";
& g. q5 u8 u$ N2 a6 G - let ww = 400;6 {, r# [1 Q& d! I
- let w = getW(str, font0);
; X; m R9 @: m8 O% @: @3 {" L - g.drawString(str, ww / 2 - w / 2, 200);
8 Z: f8 P. ]4 A0 u. d - }
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# ?5 P2 S! z3 d5 H8 }0 V- const mat = new Matrices();# f( P1 I( c8 }& R4 a' H% x+ I! L
- mat.translate(0, 0.5, 0);) e$ A) @/ n Q5 e6 s8 @
9 t0 P0 ?$ U, j8 U: E; m- function create(ctx, state, entity) {: p7 a F2 H! z' l; j
- let info = {3 x- u4 [) l8 H! T! |
- ctx: ctx,
; f' D) v- {" Y6 O0 I; ^ - isTrain: false," Q9 f: O! f- O: W
- matrices: [mat],: \0 q3 l" _; k9 @
- texture: [400, 400],3 I, X- u( w4 K# m! k/ S
- model: {: ?9 O4 V+ J5 R8 P1 D
- renderType: "light",
+ W6 R9 Y! l" j - size: [1, 1], E# B" o" C& k2 N
- uvSize: [1, 1]
9 ~1 F _4 j6 y0 i6 O3 ?! ? - }
+ P3 b: y# W" X+ V- }" n - }) c2 W7 W! `! d/ K5 S3 O2 Q0 R
- let f = new Face(info);
- |' G- U3 }- C5 J* W& E, n5 k - state.f = f;
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6 Z% @( L( I9 M& b, O: {- let t = f.texture;( |; s. U! ` O; S' m0 }- z T1 {
- let g = t.graphics;
) n+ k# @; Y4 B4 ^# v* V - state.running = true;
$ t: Q" D# M8 q2 [# [3 ? - let fps = 24;
# {# u$ U9 S P) ]: N ` - da(g);//绘制底图
8 Y, O7 [4 k3 ]: d+ v: m - t.upload();6 k% } ]5 s9 z8 f8 {: {: y
- let k = 0;
$ k& i, A. `3 i& Z - let ti = Date.now();
2 v- B } u: o - let rt = 0;5 R& e8 k) e4 X4 B4 F
- smooth = (k, v) => {// 平滑变化
$ R9 w' i% e$ \ V1 i - if (v > k) return k;5 }7 v0 e, P! f. U8 C: B2 m; ?
- if (k < 0) return 0;
& [6 J0 V) `; } u, F - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 o9 Y1 y6 }, ]! q - }
% j: {# D3 N0 } - run = () => {// 新线程
4 @! @4 m1 f! K: Q+ ]+ {6 h - let id = Thread.currentThread().getId();$ L8 r1 N6 @: ~ R! w/ F% k2 j+ _
- print("Thread start:" + id);
7 l9 B {& z) e4 A. r0 A" _% p - while (state.running) { B; W. h( M# J! d _
- try { {" Q3 u$ K; w/ V& u( N
- k += (Date.now() - ti) / 1000 * 0.2;8 q |. z8 \7 h/ S* C: ~
- ti = Date.now();# ~ n5 O b! A3 C" `2 Q
- if (k > 1.5) {% N6 T6 y7 Z) R3 O9 B4 r; @
- k = 0;
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- setComp(g, 1);3 R9 C, C Y2 E) j' x0 I
- da(g);
/ f4 X$ b+ P3 u9 S0 X x - let kk = smooth(1, k);//平滑切换透明度
8 }3 M6 [! l. w! |; R/ s- b - setComp(g, kk);" {& T0 k6 \8 [; {" B- j
- db(g);
7 d Y2 ?. Q3 k d - t.upload();: w3 P2 M8 H- v. o: h# t
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 o$ v9 ^: d5 h - ctx.setDebugInfo("k", k);7 F" H. p' C) k8 i' s; M9 E& a$ c
- ctx.setDebugInfo("sm", kk);
1 \; K+ J5 y9 w; m+ o8 J6 {6 S - rt = Date.now() - ti;
' a% E; X/ T/ g' t. z! Z - Thread.sleep(ck(rt - 1000 / fps));
5 ^8 s$ X4 F% M3 V - ctx.setDebugInfo("error", 0)
! S3 R2 M* R" P/ ]6 _. D - } catch (e) {! k* t h7 w+ v& y [( j% y
- ctx.setDebugInfo("error", e);
+ v5 A+ j; n+ K; `' I0 E - }) ?3 Z! |- E8 b! |/ L }7 n' P
- }
. U* ~: o9 V# F, H - print("Thread end:" + id);
5 _$ ~ `$ S3 U9 t. o3 E - }
: d4 w4 k- l" O4 R$ s - let th = new Thread(run, "qiehuan");1 Q, ?* j0 l' R1 ?, l. L* n! Y2 Z1 Z& V; f
- th.start();
: q X& O6 L2 ]: P - }
' V2 D1 Z }" ]2 e
: }5 w* `; B N( h, |0 D" k3 Z- function render(ctx, state, entity) {6 s4 a: C$ y, F- B! A& }2 _0 E
- state.f.tick();+ \2 T+ m! ?' Q/ s) h* u
- }
& e- h! Q$ \& a% g3 C5 T3 V
9 A' t0 X7 _8 T& K- function dispose(ctx, state, entity) {/ |! B0 y+ C: z# Q: M4 _
- print("Dispose");
% x. U. s! ]- C) G6 d( W - state.running = false;2 x0 Z( R& U# c2 q0 u( C& o2 U: O
- state.f.close();
% G% p7 I8 F2 u# @6 N - }8 ]- ]9 {2 o& w( C7 g0 t3 s
- . u7 o; m- h# k/ a; `6 u
- function setComp(g, value) {
$ |* }* \" }' H# T' J) H0 C: g - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 F& P( z: V5 @( e - }
复制代码
2 F2 a6 \6 f& H: C: \! l8 N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。' U0 G* h' Q0 i# I" N
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0 ~6 P9 A; ]6 |7 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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