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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。8 _; Y( q; d7 j& S! @4 S
- importPackage (java.lang);. @/ z/ c7 l. r: h- w& I
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);3 ~) K2 V5 t; s/ |/ W, P# P" a c7 A
- , i+ X7 I8 }4 n' U4 S( b! _/ p
- function getW(str, font) {
% c$ e9 I$ j- k$ A' F! B - let frc = Resources.getFontRenderContext();
6 C4 k) [+ g% C6 b" I0 \" E8 L& j- a6 n - bounds = font.getStringBounds(str, frc);
; k; v" u' m1 p$ G - return Math.ceil(bounds.getWidth());+ u1 R5 V4 [* I) ~/ z$ H, f8 |
- }/ \. w& }4 n. ], N! M
- 4 `# `/ ^! \6 m% w2 v
- da = (g) => {//底图绘制
' k, p2 @* E7 t; ]( B9 q' ?+ }+ B) x - g.setColor(Color.BLACK);0 O( V' Z( V3 `4 k' Z
- g.fillRect(0, 0, 400, 400);
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# w, E* V( ~, `, a- db = (g) => {//上层绘制
6 x( }7 o, g% j3 Y6 W0 E) c2 o - g.setColor(Color.WHITE);
4 N7 u v4 X. } - g.fillRect(0, 0, 400, 400);
' }7 b0 b; B% e: | - g.setColor(Color.RED);
7 o$ Q' R, H6 {5 L - g.setFont(font0);/ w' d3 ]8 p' P6 v* [4 B& m
- let str = "晴纱是男娘";
) R" f7 r# M6 a - let ww = 400;
5 v6 Q1 M5 P" z C2 t c - let w = getW(str, font0);7 G1 ~+ j# ~) n* W/ \9 l
- g.drawString(str, ww / 2 - w / 2, 200);- y+ t8 I/ d2 O8 `& H% S9 r
- }+ L4 }% E, Q( e# }
- 2 ~1 |2 Q$ t s, U- J5 f
- const mat = new Matrices();
* o' d( q* u b$ f0 g* e - mat.translate(0, 0.5, 0);
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0 X2 I* E! r- I# S+ s! g- function create(ctx, state, entity) {
4 u9 X. i* F/ c5 i# j - let info = {
7 E2 G. t0 i1 {7 w - ctx: ctx,: J# j* g1 T/ ~3 a w
- isTrain: false,
$ t' ]: f. y5 P3 X' |9 z7 d - matrices: [mat],& _" b9 t+ ~: A8 t! {' f
- texture: [400, 400],
( y6 r1 h! K9 [9 G1 ^ - model: {0 k5 X+ H K6 D5 B2 c8 k
- renderType: "light",
: P% P/ ?! S8 f5 Z! U& j7 b7 F, M - size: [1, 1],
% s9 b* U/ l( j/ C! z0 |9 S - uvSize: [1, 1]
2 ^& b$ @( c8 q0 s( y/ h! r - }
+ H' Y7 C- m+ J* i% p$ q% C# M" K - }
1 K# a2 b; y0 V, \ - let f = new Face(info);
! i; L' j5 l7 c+ @8 z - state.f = f;( L8 K! g2 f2 @' l3 ~
6 o' L3 l9 w! z) {, w6 t: c6 A# D/ d( ]- let t = f.texture;" R+ m# M0 n8 o! s, |5 `" i" A
- let g = t.graphics;
9 x6 \! W6 \2 N* x1 ]# y/ O - state.running = true;
6 K6 u7 ^- f% S4 O& l1 h" i - let fps = 24;
3 _4 E/ r; @6 I( `; n - da(g);//绘制底图+ C/ d& ^; f, g+ e/ a
- t.upload(); Z" ]; _" l6 p% f; B% n0 i
- let k = 0;8 |: u3 ?1 O8 ~+ g4 g
- let ti = Date.now();
% ?" w. P7 V, [9 `* s0 X0 _# C - let rt = 0;& l" h2 w Y- p0 R6 M! e
- smooth = (k, v) => {// 平滑变化
/ t( n4 Q% v! M/ I, _ - if (v > k) return k;
. i3 |8 m$ Z5 }# K7 n" [ - if (k < 0) return 0;
4 f2 N4 v, I c# @ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- Y2 l& Q! U* P
- }% a3 N1 j: r5 V6 W2 } L
- run = () => {// 新线程
9 r+ z/ V) |; Q K* C9 U - let id = Thread.currentThread().getId();( E2 V; _1 h5 X+ y6 @: U; V
- print("Thread start:" + id);
. s9 `4 E/ y% R - while (state.running) {
. z" M: E. o1 [/ ? - try {
+ f8 X" a" ~1 G7 x( e - k += (Date.now() - ti) / 1000 * 0.2;9 k. t" }8 ]/ z" v( r2 [( A! z
- ti = Date.now();
+ {8 Z5 I4 @1 _! ~+ P, Y" h7 v9 { - if (k > 1.5) {: W# z, T& }8 z% K1 c, N
- k = 0;
+ w; Y) r6 W# I6 H/ e - }
4 z E2 |1 i% G# w( ^! a - setComp(g, 1);
9 T1 w- S* R, ^0 m - da(g);
) L/ l6 Y" v* x9 g/ W" R. z - let kk = smooth(1, k);//平滑切换透明度7 I1 Z- s ?7 [
- setComp(g, kk);
' P9 u! K! {% j, i - db(g);
: z' X' L8 q( z0 i; i* ? - t.upload();
* q% s) a0 t" U$ f9 J" m% ~: E - ctx.setDebugInfo("rt" ,Date.now() - ti);; G/ r5 C% T8 F2 ^* o
- ctx.setDebugInfo("k", k);
# U* Q o+ V# R4 }1 m# ~ - ctx.setDebugInfo("sm", kk);+ r0 o) Y* U) J5 `3 A+ N: q
- rt = Date.now() - ti;6 C( D. h9 t7 Y0 W2 c. W
- Thread.sleep(ck(rt - 1000 / fps));1 X6 m- M; d( e, T4 j0 X
- ctx.setDebugInfo("error", 0)7 _; G K5 E+ O0 N1 p
- } catch (e) {2 h; v& a+ U- H, D
- ctx.setDebugInfo("error", e);
$ r g. k% ~. t+ z. ]# _' ]; D3 C - }
' O9 p3 B8 `1 `! [* @ - }
- i/ M7 q+ W4 m* Q - print("Thread end:" + id);
' P4 l; ], i" [% \* C - }
U8 x$ n$ {4 o1 ^5 { - let th = new Thread(run, "qiehuan");
0 _) O0 b$ x. g5 a* t5 O - th.start();
! t1 g8 I. G' T& p E: h6 _* z3 A - }
# i; k. c. l/ ~) W9 U - 8 ?3 H0 W( j# a
- function render(ctx, state, entity) {% _7 R3 y: A! { q
- state.f.tick();
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- 5 f" ~) F: q) B' v' ]
- function dispose(ctx, state, entity) {% |$ t& I: i0 N/ L: i( P, N: f7 C& R
- print("Dispose");7 j2 s' a$ T7 x: c/ ~
- state.running = false;! D9 R( b" M, S: D0 S
- state.f.close();
6 j0 J: M3 E* {( U( z - }0 _! g' ~/ E8 l. }
- ( E/ [4 L, m% l" D* j# Q
- function setComp(g, value) {
' W( V: k, ^- Q- c+ b3 j" a2 q8 T - g.setComposite(AlphaComposite.SrcOver.derive(value));
% H! Z3 @: J2 v7 B0 |( x - }
复制代码 6 {# _" I: H1 x; h$ Z% T& U
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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) _4 g! v: F& `8 n( y" v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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