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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。, h& [! ~0 D$ T5 ~- R3 D
- importPackage (java.lang);
" o+ L- W' f6 e - importPackage (java.awt);
& e! L# u- n& O& _ - - k/ C) T* b7 k9 C# N9 U4 @
- include(Resources.id("mtrsteamloco:library/code/face.js"));# ~* C& R7 m) r% Q6 @1 U
- / D, b' j+ f% H5 w0 y6 V0 s! p" r8 \
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
# l5 \. N3 f$ ^' Z: q
" V! G) [' t6 n* _. C; `8 `- function getW(str, font) {
' _% ]% I& L" C; H6 H j - let frc = Resources.getFontRenderContext();
' O( \& O {5 n- Q - bounds = font.getStringBounds(str, frc);1 F' K, S# D+ P( |% ~9 O
- return Math.ceil(bounds.getWidth());6 V( |& a' O: b
- }5 X2 n9 |" B, I
- / z% i( T v2 f& X6 j3 ^7 a! V( Z
- da = (g) => {//底图绘制3 n& ]( o$ k+ P
- g.setColor(Color.BLACK);
, I- j9 w- z# }- p' M - g.fillRect(0, 0, 400, 400);
% F& `0 L1 u* V b - }0 w' ?) F8 b* u( c9 ^5 E9 f
- + d8 M# c* Z5 ^# z2 y
- db = (g) => {//上层绘制1 H. n g+ b6 L8 d; j* p. C
- g.setColor(Color.WHITE);
( N% j! ~$ `$ Q+ w, X - g.fillRect(0, 0, 400, 400);' d8 q8 D) L6 `( j* P: h
- g.setColor(Color.RED);3 g; `- a' o8 n3 W1 x% f0 P: T4 J X
- g.setFont(font0);5 T, x+ c5 o z' J6 r
- let str = "晴纱是男娘";% h+ g7 T' d6 s8 m% S
- let ww = 400;+ S; K2 z8 l; |
- let w = getW(str, font0);7 M/ y2 @2 Y+ \- u4 s' M
- g.drawString(str, ww / 2 - w / 2, 200);4 E a3 P$ D# x: h5 d
- }
8 Y2 g/ n& }4 w - ; a+ L2 f/ F! Z1 I ?
- const mat = new Matrices();
7 d! @( q4 n' v5 B: j - mat.translate(0, 0.5, 0);
9 W# X+ U. h+ h( Y1 h6 }( B# b - 9 W# @* C/ S4 t
- function create(ctx, state, entity) {) M+ {) {: n- B5 x( E
- let info = {
2 F- D0 P! b9 t% X - ctx: ctx,
1 y$ t3 h1 F# C; k& K - isTrain: false,
I. e8 j# ~/ ? - matrices: [mat],# U, E- D! j# n, D+ c
- texture: [400, 400],
1 i/ U/ N) d: r4 d# J - model: {
! |8 @; V! K. z - renderType: "light",
4 b5 E+ X$ e4 \6 U& u - size: [1, 1],5 Z" c" D. A" g( n% e% K9 {% V! d: Y
- uvSize: [1, 1]
+ o5 e# a3 I( I: N - }
# \' N4 \+ C! d2 Z3 J% @ - }/ C+ f; l8 E" Q. @4 c2 \' B7 D
- let f = new Face(info);
& o, e/ E4 ]+ A0 z4 ^1 H' ?6 G5 `0 P - state.f = f;7 a5 e8 _) X$ r7 c
- 9 J0 d1 v* f6 t6 Q' `
- let t = f.texture;
1 v3 D" L3 K' D2 F# P3 { - let g = t.graphics;: B. F8 q9 d# P% P4 C
- state.running = true;
5 \, j$ D; `+ V - let fps = 24;
+ P' j5 W) l6 x9 W1 a+ c - da(g);//绘制底图
0 k5 ]& V" Y; n7 Z2 N; R4 y - t.upload();" k+ \1 e, e0 n7 P- t
- let k = 0;9 `6 \) r1 M; N( b9 c) U
- let ti = Date.now();: i' x7 _4 A& Z# G( o
- let rt = 0;
& }) `+ E; A z7 h8 w& A - smooth = (k, v) => {// 平滑变化4 N! ]/ k, _: I$ x
- if (v > k) return k;
. ?# `; s7 K% C6 u - if (k < 0) return 0;: v6 B/ Z% E/ j% p( D9 Y9 I+ Y! L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. W! @8 A: U1 @, E
- }8 y% z' x) a, b8 z
- run = () => {// 新线程
`, d% f/ P& u5 R- W - let id = Thread.currentThread().getId();
% v4 V9 n. w3 |8 w9 {' b0 s - print("Thread start:" + id);) C/ C; R+ N4 ~/ p
- while (state.running) {( m/ }+ U+ H& T3 Y& Y2 V
- try {
/ u6 f0 a4 q) T% W+ y - k += (Date.now() - ti) / 1000 * 0.2;
8 t: K1 q. v6 ~: l+ o6 k) X - ti = Date.now();$ F8 ]$ t: t$ H+ C: Q n. F
- if (k > 1.5) {
4 I" g) a# g. U: ^$ N k - k = 0;
1 K4 O8 @" `+ q; v6 M% a - }
! z; y+ \1 `9 X& g7 x - setComp(g, 1);
+ C% B( b! [9 f - da(g);
6 e% K4 G* W$ L U9 ` - let kk = smooth(1, k);//平滑切换透明度
# e/ x/ |$ R" p% ~9 D/ d0 b+ w9 ] - setComp(g, kk);
) [4 |5 S& p/ ~ z" I/ K3 z& `& U - db(g);; v% R' ]4 p5 H- w
- t.upload();
' @8 I9 ]/ _$ w1 @1 d( n - ctx.setDebugInfo("rt" ,Date.now() - ti);7 y" g% x. }& f$ q: ]; c0 H6 t
- ctx.setDebugInfo("k", k);" i2 f, N/ ~/ c1 O M
- ctx.setDebugInfo("sm", kk);
1 a, X9 u- Z1 w" s1 X; |, y - rt = Date.now() - ti;9 p0 o5 x: Z; {' ?
- Thread.sleep(ck(rt - 1000 / fps));
' u1 c! A5 J" R& m0 t5 Q( n! J - ctx.setDebugInfo("error", 0)
8 V0 ]* H3 b2 |9 c6 b - } catch (e) {
% H, ?, z. `' `# b# H - ctx.setDebugInfo("error", e);
/ k/ }" Q* c$ | - }) I% }) K' Y0 p0 r( H2 E
- }
4 Y2 t/ j# S. l1 N - print("Thread end:" + id);+ T, L# G. S. b F: l1 @3 a5 x0 j
- }
: E+ O+ x% m+ @4 o4 p# V) L - let th = new Thread(run, "qiehuan");
b% ~0 n# T( L - th.start();
- M' T+ U T1 d5 ~5 s - }% f2 g* b0 S: y) ]9 e: ]
l; N4 Q0 x4 z) P9 e- function render(ctx, state, entity) {" o& Z" |0 O9 ~# A# j+ |" x( U
- state.f.tick();0 z& ~3 K) a! F" o3 i; X. b
- }' ~7 [* K+ Y: e- v( G+ r
+ [, D' `- }, i* f# B7 u& G- function dispose(ctx, state, entity) {6 Z0 L- a. c# P) |+ W
- print("Dispose");* V) m: D* p; O2 p
- state.running = false;
; ?6 r$ d0 q. @ f! }* A - state.f.close();( q0 @% I+ _- s; T* a( }6 ?; V
- } o7 P8 j6 g2 g0 I" g3 v5 m' r
; B* _4 i. t& V* [- function setComp(g, value) {
, x' Y/ A6 U7 N: y8 J& F - g.setComposite(AlphaComposite.SrcOver.derive(value));
6 \, _4 z2 D6 @9 m. x - }
复制代码 & J$ f" d6 T0 ?5 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。$ W9 J1 Y5 F1 ^- u( [
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- S( U9 C ` l7 r, p. S顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( t( @+ E" s2 S* X$ W: u( ]
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