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+ f! ~; N7 \+ {/ e! y4 U T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。
$ U0 E/ w& ]; J: T- @+ c! i1 r5 c- importPackage (java.lang);! a1 a6 y- P. } i
- importPackage (java.awt);; ]$ ]/ z3 e; R
- n2 n( y8 e7 \) A
- include(Resources.id("mtrsteamloco:library/code/face.js"));
- r; e$ G# l c0 J: M; E" j - " @/ x0 `2 T! }5 a/ X8 ?1 X# G
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& O: |% b6 g' v- A) G8 {; Y
4 M) f8 ?+ |; L7 E% q: Z- function getW(str, font) {
6 d' T& O5 M* q a - let frc = Resources.getFontRenderContext();/ y1 _$ z& h/ `; T) y h* S
- bounds = font.getStringBounds(str, frc);
. t$ K& s6 e% z - return Math.ceil(bounds.getWidth());1 ?% h$ c' |, @5 h: d( g k! t
- }
( Q1 M' x2 }* Y; A R- i0 m
" q; P( O3 m4 W- f& i1 k8 J; ]# \/ E% w* e- da = (g) => {//底图绘制
( K9 A& O+ b+ W9 z) N - g.setColor(Color.BLACK);4 }/ l# G$ S% T) b4 X
- g.fillRect(0, 0, 400, 400);
: V( u% z% J& t: P. T2 Y - }
7 I, b( ~# e2 r' g' c# _ - + _# J: L0 S( Z. P* }
- db = (g) => {//上层绘制
6 t7 ^5 Z l- j3 S; ]# A# r9 z3 Q - g.setColor(Color.WHITE);
0 @7 v6 K# f& S1 c& | - g.fillRect(0, 0, 400, 400);3 V+ {! J! }8 d: X& ?
- g.setColor(Color.RED);% R7 p E3 M4 u& U- j5 p
- g.setFont(font0);
+ H0 C0 v* u9 o' K - let str = "晴纱是男娘";& s4 f' M% j/ a5 J% k4 y0 I" N! P* o
- let ww = 400;
! C) t+ f; q! M, u8 Q3 [ - let w = getW(str, font0);
6 s7 S0 M4 F1 _" n* R! _" B - g.drawString(str, ww / 2 - w / 2, 200);
1 `! O& ]7 ~4 d' i6 Z1 e5 j - }
* ]8 @( Q. }: H- p - 8 q2 {( j7 q# z% r
- const mat = new Matrices();
7 v) q. b9 x7 s# a - mat.translate(0, 0.5, 0);
6 C. p) t" [# `* J - ! k$ V# x- P9 t7 N1 n
- function create(ctx, state, entity) {
+ P8 q3 Q2 M; }& v; O1 N - let info = {
" ]! ^* d7 j2 N: T( I4 N - ctx: ctx,1 U! ^: m* O4 I! e( B8 q0 `
- isTrain: false,2 R0 N& y; n7 q
- matrices: [mat],1 |. `& Q. M' g- ]9 e
- texture: [400, 400],
7 Z3 X9 w5 G! Z0 t2 m" A7 X7 t; c; A - model: {3 W: K: f, u; ?8 Z1 A
- renderType: "light",
- X8 S$ _) }$ B6 M- y$ Y; f, x - size: [1, 1],2 A9 q/ a$ o( I8 P4 ~% Y
- uvSize: [1, 1]
* z: E/ M4 [) \! E/ r% L1 o - }( `+ q5 I& j/ y% C/ X
- }
. P. Z% i$ w* p- z+ y* Q - let f = new Face(info);
/ S4 Y/ B( `8 v' F% K# j" f; ^0 J9 r - state.f = f;
, w* U" @5 R# l, H5 H
* |- M7 v0 @2 q2 j2 i: U3 h- let t = f.texture;$ s+ r* T4 s/ h. S
- let g = t.graphics;+ t7 M, `( i8 a7 |$ b& H" V- b
- state.running = true;5 m& e/ L& T- q
- let fps = 24;
r. D1 x8 n- }( L: k9 [! S - da(g);//绘制底图
' |1 W6 ~8 D7 B- O6 C: G - t.upload();
! B* @8 z7 f3 g1 A% _: E2 @ - let k = 0;
5 t: p: C% { _2 P* x - let ti = Date.now();1 _1 } b D9 K* _
- let rt = 0;
+ V! o9 E. `8 x& N2 {, v# q9 D - smooth = (k, v) => {// 平滑变化! g5 D/ ^! H& q
- if (v > k) return k;! t H6 A7 N# t& ^1 b7 S" m
- if (k < 0) return 0;8 h2 e3 K7 x7 u% r4 Z U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 W) k" |2 r: \0 X* \- ` - }
" {2 d/ B3 R6 d0 ? - run = () => {// 新线程. ` m+ U! B$ I! h. i9 a. H
- let id = Thread.currentThread().getId(); B6 @. T$ M5 S7 j
- print("Thread start:" + id);
6 q! {. p0 ~1 p1 M- {' l - while (state.running) {
6 G2 @; J7 W _ - try {
/ K9 g+ ?' M0 |3 c - k += (Date.now() - ti) / 1000 * 0.2;
" K7 S% ?3 w0 A; ` ~3 C% P, | - ti = Date.now();6 H h* t6 X! Q. K1 F- B
- if (k > 1.5) {% E( x/ }2 T9 I
- k = 0;
' P; c# n: O, x- `6 K/ r* ? - }
% C' k8 M9 Y0 A6 Y - setComp(g, 1);6 O. f; m& P/ c
- da(g);% \5 t0 I0 q2 U, Z; V& L& E" l N$ X
- let kk = smooth(1, k);//平滑切换透明度2 I4 C! N; k( V
- setComp(g, kk);
, X: G4 X4 d. t+ }2 M - db(g);
+ w% n) b9 {: R# n. A - t.upload(); k& J+ c$ }+ p. e$ h
- ctx.setDebugInfo("rt" ,Date.now() - ti);; N6 I: r8 {& H5 V
- ctx.setDebugInfo("k", k);4 N' |8 E# _( I1 v
- ctx.setDebugInfo("sm", kk);$ W' `, d6 E* A, K
- rt = Date.now() - ti;
) `+ q" z8 l' w! o8 L - Thread.sleep(ck(rt - 1000 / fps));; H* ^) u& c; L$ ?( x# v. e
- ctx.setDebugInfo("error", 0)
0 W6 [8 \# W' O# k$ V0 c - } catch (e) {; S* E+ {9 i; ~8 y6 G$ K0 G
- ctx.setDebugInfo("error", e);
* h% n7 u5 w) u - }
9 E- G, E% x6 |$ w4 O9 ~ - }
2 `* I& v P& X+ `, N1 i- g- J - print("Thread end:" + id);
! s5 |, z9 T+ e' l3 A6 _ - }
! x* Y, }% q( W - let th = new Thread(run, "qiehuan");# @4 L4 k# @2 p
- th.start();/ k3 `! l3 \- k8 n: I
- }+ h+ X$ Q: t+ r& q$ Q6 i. F
- 0 _% N6 i5 R( ]; F% R
- function render(ctx, state, entity) {7 b4 z; h; W6 s8 r. k
- state.f.tick();; f3 R. ^2 O4 p
- }5 V2 q$ ~# O- z% V% Q1 f
$ V y: k& S( v- function dispose(ctx, state, entity) {
% P \6 [; B2 t3 W4 p+ J; G - print("Dispose");
' U! x; c6 o4 E$ P& A - state.running = false;5 Y8 s+ N' G/ e% z. G1 K
- state.f.close();
4 z6 f$ n! R( C - }
+ O5 b* Z8 U) D) @, b3 n' S- D - " P) o, M) u: y8 V% o
- function setComp(g, value) { Y7 w, h$ E2 d! ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% J, V" W0 g$ T" P - }
复制代码
# T7 P, H, D( ~( m# Y* f9 u/ M; u5 B4 |- \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。+ {/ h/ }' V% z, L& a
( a6 V) p; M& \: f
% s+ b( S* Q% p, |- l顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): c" ]; U: f( J& X& W7 Q
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