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1 \( s% d: C* s9 X. }4 E1 |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。) k8 a; l; F( @3 [& b4 J
- importPackage (java.lang);$ @9 d9 N6 ~8 h& _9 H# d9 ^. o
- importPackage (java.awt);
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: Q5 H6 J l" ?! |7 a _" G- include(Resources.id("mtrsteamloco:library/code/face.js"));, N8 G3 Q* y9 b7 W7 {
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); m% |" {. z& P2 U, p
- T, T1 T, R; X/ {- F5 k
- function getW(str, font) {+ I4 N: v j( _8 A' j
- let frc = Resources.getFontRenderContext();: G. A, b5 b1 |5 n a
- bounds = font.getStringBounds(str, frc);
@8 ]6 L3 q3 c; T, ^ - return Math.ceil(bounds.getWidth());
6 j, ^4 ^1 g" n9 E - }
1 K2 I' P$ D h
8 t) A% B$ Q/ t( H1 ?- da = (g) => {//底图绘制
! ]# }9 L8 w7 K7 g6 x7 R4 [ - g.setColor(Color.BLACK);
4 |/ P5 w8 e6 r8 d2 m9 Q1 t - g.fillRect(0, 0, 400, 400);5 C* h$ A) s+ s& h6 `7 T' y8 W$ M+ D9 q
- }
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( ?5 Y5 N! m$ l7 l6 Q9 B: n- db = (g) => {//上层绘制3 g9 ~# s0 Z* O% b
- g.setColor(Color.WHITE);
8 d) {5 M) C% c2 |, U$ o) v) L - g.fillRect(0, 0, 400, 400);# ?# O/ J" m5 E7 q
- g.setColor(Color.RED);$ f: q: N* R; y
- g.setFont(font0);
. B7 X: b9 `& a% A4 I+ c - let str = "晴纱是男娘";
. ^" u1 b/ |$ w0 O3 S/ D! S0 r - let ww = 400;$ E4 U5 O/ p; I: U" w; \
- let w = getW(str, font0);
2 N. a# P. {- x2 S0 m - g.drawString(str, ww / 2 - w / 2, 200);
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. x) Z1 f8 A$ K; k- V, l8 b! c- const mat = new Matrices();
6 {2 v; w. ~3 C6 z; j - mat.translate(0, 0.5, 0);: i. R$ x7 n6 c3 c0 s4 H% \" T
, w7 Y* e1 d! J6 ^; v- function create(ctx, state, entity) {
h. H' c ]- ^( p' F - let info = {
. `) F6 O# w* K/ D - ctx: ctx,# z- G0 _/ R4 @; {; T$ K/ O
- isTrain: false,
" K6 w/ [: L% ]0 @% n - matrices: [mat],0 P0 N( ^8 l4 k' N
- texture: [400, 400]," j* i1 Z9 }" ~8 F/ H2 x
- model: {
. i6 ^( z0 R0 n0 t9 k* y0 r5 X - renderType: "light",; K) P2 m, Y7 \( Q( H& U
- size: [1, 1],, ]6 [9 B* r2 W3 O
- uvSize: [1, 1]
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- }
* v- K0 q0 i% s. j% S, h9 h - let f = new Face(info);( x# x9 N' N+ ?: x6 {4 C
- state.f = f;
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- let t = f.texture;
* k) Q4 R% m3 P! n0 u1 f - let g = t.graphics;# c" q I2 k) u: u+ A1 V' _" r
- state.running = true;
9 |2 x6 q. ]+ ^" ]0 k+ p - let fps = 24;: @ S) ^7 E D# J
- da(g);//绘制底图
4 @* x8 L8 |, F4 O& V# t% p - t.upload();
6 u2 ?6 k1 o/ a. I O - let k = 0;- \3 c* T3 _& ^: F0 F" \6 z
- let ti = Date.now();& k& l' M. G# {$ c) P; ^8 d4 R
- let rt = 0;6 j9 t: R" P: u
- smooth = (k, v) => {// 平滑变化% G; I8 I# Y' p! Z' Q) {
- if (v > k) return k;8 z2 `+ [( r2 j- N. j) L
- if (k < 0) return 0;
) }$ C/ w6 w F - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 r2 Y1 E* n. y a' W - }6 H) R. ]# z9 J( i+ Z
- run = () => {// 新线程
2 r8 d& L$ n1 ]1 o/ ?, G$ \ - let id = Thread.currentThread().getId();1 E0 T1 D. d `2 p' k7 _, Y
- print("Thread start:" + id);
! l2 m6 j! @0 u - while (state.running) {
l. H: _: o0 y5 y - try {+ S6 V9 ?3 V/ ^7 s1 c6 \) E
- k += (Date.now() - ti) / 1000 * 0.2;
9 I+ V1 P- W% d2 S1 U - ti = Date.now(); h5 J& V4 c6 `' _/ |2 N& h
- if (k > 1.5) {; k. p9 s9 Z4 J9 j3 R
- k = 0; x- o: _5 D/ n- R
- }
* |, W& w( r% H$ s* h8 ~: Z - setComp(g, 1);
4 R0 \' H6 M. g6 n" {: o - da(g);
4 f; ?, \" n# C/ t8 f |( s8 E - let kk = smooth(1, k);//平滑切换透明度
6 F% m7 T: W6 M: U1 K - setComp(g, kk);
: n8 M% I7 b% C" O. [7 S1 e - db(g);6 T# e5 N/ Y% U- _
- t.upload();$ n# d7 C$ t' b" J0 f
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 Z1 s5 |' o( W' z y
- ctx.setDebugInfo("k", k);
$ x( D; K7 m+ z0 D h9 U - ctx.setDebugInfo("sm", kk);! u( \* V& Q2 B! _; w" D& h5 y
- rt = Date.now() - ti;
# n" U! ?# G% N8 R0 y - Thread.sleep(ck(rt - 1000 / fps));
" r) n9 r3 P& Z5 ? - ctx.setDebugInfo("error", 0)
! \! f1 j8 W* q. J; b; B2 } - } catch (e) {
# }6 b( @* M* e9 r0 H* D5 } - ctx.setDebugInfo("error", e);
5 H Y& J5 Y* V" C2 y; U - } n% q* y& W$ o7 c5 m1 N( B
- }
/ H& N0 X# x/ t" | - print("Thread end:" + id);, D" C/ ~. B3 v S
- }8 M0 v C6 i4 I. L9 f
- let th = new Thread(run, "qiehuan");& r+ ~$ ~2 X# y: d, ]% A1 n, C
- th.start();
. _ B3 [9 \: ^0 k& \ - }
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' b# X$ {/ h4 B8 L6 W( A- function render(ctx, state, entity) {# L" K% z2 n- N$ u# K6 o
- state.f.tick();
' F+ c3 h; O" K& s - }
4 ]% M3 P9 F6 z& n3 a
: A$ F& G% ~1 M2 c0 ~- function dispose(ctx, state, entity) {. B( h# V+ A0 R* }7 [
- print("Dispose");
) [& p3 E0 Z9 l7 w. z3 o - state.running = false;1 \6 E+ _1 r. R
- state.f.close();
9 B$ Z1 |1 ~: n) _/ q0 { - }
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- i8 m$ C: |) C1 u; P& ?- function setComp(g, value) {
' e* s2 D, ?# M1 ^2 T1 c - g.setComposite(AlphaComposite.SrcOver.derive(value));3 j1 O" L! J/ p! T& Z6 [ o
- }
复制代码
. Q: C8 x' @# y a! Z1 }/ ^4 b) w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。# A% {; {1 f" `3 l. C) `& u
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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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