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: @ g X% Z+ v+ Q! y! m# |+ R6 q) Y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。
1 O' g ?( c) n L$ j" I- importPackage (java.lang);: K9 o, G6 h7 C5 F& n* X4 t
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));8 ?! V# ?# @" [4 M* s9 r' V/ I7 X; o" b
; ?4 e9 Q4 K% E; p( [- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
0 A8 o) p! [# `5 {
- s# k2 x! H- t8 X. n- function getW(str, font) {
. `/ k* p, X' C - let frc = Resources.getFontRenderContext();& q7 W& {4 [3 u* T) y
- bounds = font.getStringBounds(str, frc);
( w4 N5 {1 l. k6 h5 C0 @$ R - return Math.ceil(bounds.getWidth());
: U* g1 S) V; s# a$ I' Y2 U - }
1 `/ d0 K; f# _8 Z1 a9 w - % o+ ?4 W5 G |6 H
- da = (g) => {//底图绘制
: u+ T3 j* b" V( o( p - g.setColor(Color.BLACK);
0 G0 D. x- C3 ]" o - g.fillRect(0, 0, 400, 400);8 {' a R! `% ~1 @# \
- }
# g0 v. G1 j$ e1 W% ^6 y - ) b3 U$ @1 k& r/ K4 t; G8 a& m
- db = (g) => {//上层绘制: I0 X r4 V' H3 j9 a& f
- g.setColor(Color.WHITE);5 y1 f$ `! h7 F+ o8 h! o2 z/ q
- g.fillRect(0, 0, 400, 400);+ X$ L5 d. @7 F1 p' N' ]
- g.setColor(Color.RED);8 R5 w0 Y8 s, [8 b4 u0 L7 `' z
- g.setFont(font0);
( ~6 }: d0 _. j- J! ?+ L - let str = "晴纱是男娘";, o. w8 W0 X: }# a
- let ww = 400;
4 b! z4 T5 d& T+ X2 L - let w = getW(str, font0);
9 A$ Z- ^% j, F1 \$ A - g.drawString(str, ww / 2 - w / 2, 200);
# Y8 G# l0 S9 b% U& ? - }; k' M9 s p9 q# C
- % ?6 M. F$ s! J
- const mat = new Matrices();
8 ^& o f9 K; I0 s4 d- N - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
4 o2 S7 a; o0 h - let info = {
2 X& n, y% i& B, }9 u4 F - ctx: ctx,% K# u9 r2 d- E! I
- isTrain: false,1 C+ z, B7 E8 }
- matrices: [mat],
; }3 e. Z7 k% S7 Y) O) W3 s - texture: [400, 400],( B' A4 |# o; r5 P# |4 Z
- model: {
3 x l: h! B, Q8 C( ?! {" { - renderType: "light",
3 Z( R2 @4 d$ h# ?( i - size: [1, 1]," y. D0 M! L0 X7 g! o0 h
- uvSize: [1, 1]" o |6 P+ T4 v' ~* E/ b
- }
! g4 n! h) r0 v$ ]: R. Z - }
$ ?; O) _2 P6 ]: P - let f = new Face(info);
) C* I+ r# v) F3 B - state.f = f;! C8 ?' d7 ^, m0 P) J
2 Y$ T; U4 v, U$ M' a6 |- let t = f.texture;( }5 A0 G% d* L/ M
- let g = t.graphics;" C- _- [5 T% L6 Y, O0 C
- state.running = true;. D p3 R/ O: c- p. n/ ?
- let fps = 24;
! t0 F8 }8 [' p: X4 } - da(g);//绘制底图 W* y. b2 @; R+ L
- t.upload();
: P3 [4 |; c# f: _ - let k = 0;# _ Z, w* z7 q0 C
- let ti = Date.now();
& x/ Z; k8 |, m# B - let rt = 0;" g1 D+ g) U+ b, {( s5 G) I; a3 y# a' A
- smooth = (k, v) => {// 平滑变化$ D, J& y# m; [) ]/ Q' T8 `
- if (v > k) return k;
& X4 J. g: I- s) d& {" t - if (k < 0) return 0;* ` I( [/ J9 [9 t( e, e
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;; g; {' ~* M" `2 g8 n' z
- }( `8 j3 u7 L* j, V0 l
- run = () => {// 新线程3 D0 `3 V" p3 p
- let id = Thread.currentThread().getId();; t7 F3 h! E+ n! ^- ]
- print("Thread start:" + id);
& r: R) A8 F# E, e2 s* N- w: D2 q, q - while (state.running) {, F' H) w6 e: }, i L
- try {" w% Y6 m& B+ p2 V7 J" K4 l7 ^' x
- k += (Date.now() - ti) / 1000 * 0.2;
7 E. f4 n1 V+ |+ _% W" r - ti = Date.now();7 u* d# F+ b* T( H
- if (k > 1.5) {0 Z+ z" N$ z, E9 ^/ f! b
- k = 0;
! d3 M& m$ R8 C6 p& B, z6 | - }& O5 z8 `7 b w% o$ E( k( v2 ~4 }
- setComp(g, 1);7 s' F2 l, z9 r' q9 }
- da(g);; B" e0 G/ v) z& o. G
- let kk = smooth(1, k);//平滑切换透明度
4 f7 }" j& P/ x) S! ?1 } - setComp(g, kk);
* k) C D1 Z6 v. E - db(g);
! `- a7 X2 k1 l5 S! L4 B, S9 ? - t.upload();
P* c/ D9 o" u6 ?! Y {2 t - ctx.setDebugInfo("rt" ,Date.now() - ti);
( ~; v7 k1 z! `% ]+ E' E% ^ - ctx.setDebugInfo("k", k);; O$ f. T# O6 A
- ctx.setDebugInfo("sm", kk);$ `6 o: D; I3 v+ n! v* o! q, L1 l
- rt = Date.now() - ti;* M" l$ o, v4 ^3 s: K0 A' R
- Thread.sleep(ck(rt - 1000 / fps));
) d5 L. o& Q% E C- x - ctx.setDebugInfo("error", 0)
/ t6 X. j4 [3 _. b" H - } catch (e) {$ i: ^2 d* r0 e6 B
- ctx.setDebugInfo("error", e);
& S. i5 ?1 L4 B3 I6 h3 C - }
0 ^( d! d# G4 k, u - }, X+ E `7 k2 Q
- print("Thread end:" + id);. I8 O; r+ p! p# V# N
- }
2 C. R; H0 f; K2 v: d - let th = new Thread(run, "qiehuan");- ?3 i! @: R* c
- th.start();
( k* p! A$ b7 V+ ]2 }* u - }( J% n$ `! |" I2 a0 B; N
- # o. ?* b2 }/ j
- function render(ctx, state, entity) {* e* p. C' \ e9 R i8 o# u
- state.f.tick();
% y9 o8 ^: m6 [8 Q, p; v6 A% R9 e2 X - }
- d+ T8 E3 S( Z% }2 }
: v$ `% f f8 Q: A. U; B- function dispose(ctx, state, entity) {
/ s4 d/ ?, B/ P) r& x( f) l4 L - print("Dispose");! ?2 z, H0 v. K9 D" n* l6 a
- state.running = false;
- Y8 a6 H% ^) N0 P - state.f.close();0 N6 r' A! E3 n5 S8 q" n) e
- }
0 B; Z6 U5 l+ A* @, A# b
+ d7 q/ v. b) a9 r& h4 {- function setComp(g, value) {
0 U) s; i1 N9 L; K - g.setComposite(AlphaComposite.SrcOver.derive(value));
, R1 _. i, X9 ^, g - }
复制代码
8 n* V E1 `2 C/ E& g( k) I3 G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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/ c7 L ~# a0 N( X: c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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