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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。
0 p9 g$ h- P& c P2 W- |% d) _: {- importPackage (java.lang);
8 \3 Y- G; |0 h* M3 v; d4 l) s5 Q6 e# \2 ] - importPackage (java.awt);
6 [7 Y# {/ d. { - ) F2 r* V, |% [; ]. L# P# A3 h
- include(Resources.id("mtrsteamloco:library/code/face.js"));
0 g) Z# @) V' p! X0 ?7 f - 2 f3 z. P+ c9 J
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 J: B3 t& u8 O+ g
& s c6 }* @5 ], {4 R8 P- function getW(str, font) {+ K8 _" n6 h& A" _3 G, f% c
- let frc = Resources.getFontRenderContext();
# o1 G7 j8 Y2 Z - bounds = font.getStringBounds(str, frc);
' ~5 d" h. s# F0 f( @ t. B/ E. F - return Math.ceil(bounds.getWidth());5 S. C1 ?5 v3 ~) M+ I$ F
- }
7 i, Y$ i' V* a, s( b0 U - - I) d9 R0 h/ Q7 i0 W+ p
- da = (g) => {//底图绘制% x# B6 |2 x$ b% Y |) l# H9 @
- g.setColor(Color.BLACK);
/ S7 V$ a7 P' ^" V - g.fillRect(0, 0, 400, 400);. Q7 O3 m1 I# R/ a3 M
- }
2 T$ X5 W4 e' R# f$ _" v+ _* B - " C$ g8 V: d$ s- n; m. a
- db = (g) => {//上层绘制
s2 f9 I0 s- V+ B - g.setColor(Color.WHITE);! \# C0 Y: H. e( w5 O1 X' c
- g.fillRect(0, 0, 400, 400);
& t5 U s" U9 z# j3 s- Y - g.setColor(Color.RED);7 ?3 {7 |) M$ J. J
- g.setFont(font0);
1 r e2 H2 G3 u1 @' E - let str = "晴纱是男娘";' { a, p! e0 N2 \' O5 C& u0 T: m
- let ww = 400;
, s) v0 V, F$ ~ - let w = getW(str, font0);' V' y! k* \0 y9 I
- g.drawString(str, ww / 2 - w / 2, 200);
& V' A! T# V; q. G# F - }
3 [( ^3 ?8 H/ @4 I - , _9 r% x3 X2 Q: _* w! r; V5 `
- const mat = new Matrices();& Q3 b! L9 F! V; F3 X6 l/ b
- mat.translate(0, 0.5, 0);9 G' I! I( i9 K& l
' D7 A. y5 t8 Q" a8 j- function create(ctx, state, entity) {& P7 ^, k1 M- _2 ?) \& f- M9 z5 F
- let info = {8 U! R7 F8 i- s! d# i4 a
- ctx: ctx, N* |8 _2 J% G6 f! F
- isTrain: false,2 W I2 {* f7 r+ h1 M
- matrices: [mat],; F7 L' s+ N8 e7 @, C7 r
- texture: [400, 400],( w, M) d0 v7 t: f- d N
- model: {9 V- ^: r- H0 T. E9 e+ b# n# p
- renderType: "light",
. G! s" k O, b - size: [1, 1],; z$ j- v- u2 e E8 S
- uvSize: [1, 1]
( h0 W7 M+ F& B - }. G- i' {* _, Z
- }& a" @ E2 ~7 x, P
- let f = new Face(info);
Y ~, [5 d% n8 \' { - state.f = f;
B6 a, \0 j/ y# H( t d/ a5 {3 m) r
( v$ i) q& h3 e) f, v+ v- let t = f.texture;
# k+ f$ A. C3 j - let g = t.graphics;
3 S% l; N6 X7 A. B! _ - state.running = true;
6 J/ W' L/ }7 ?% f - let fps = 24;9 P4 U2 R) h) D( W! M' K1 o8 b
- da(g);//绘制底图
) I& s2 p0 \! B8 k' g - t.upload();
$ V7 U5 @4 L4 g" M' ~ l - let k = 0;9 w/ A, S4 F7 o* T
- let ti = Date.now();
% B& ?9 m% J- J - let rt = 0;
; C& T% e' f& K7 _' S - smooth = (k, v) => {// 平滑变化. B5 f; ]0 S& X5 Q5 z6 i, P0 {
- if (v > k) return k;2 E8 @2 L5 o& P5 t4 Q& Y
- if (k < 0) return 0;! b8 L! A& q6 K* g$ T) w1 r
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;4 x9 x% I4 z2 G# e( W" `
- }
' C6 r8 r- D5 X- e$ _" ~! Y - run = () => {// 新线程
( R4 s9 J6 T$ Z8 \/ } - let id = Thread.currentThread().getId();0 a( W3 A: _7 v* T3 Q7 o
- print("Thread start:" + id);
3 V# v! c/ j% V' G+ o" J - while (state.running) {6 o c1 O1 _0 c% p1 L" Z* D
- try {
! ~5 _; x+ W1 t( g) T ? - k += (Date.now() - ti) / 1000 * 0.2;) W5 J1 y+ f1 ]
- ti = Date.now();
7 H, J# g6 y" J& P- \! \ - if (k > 1.5) {- Z2 K- M) D7 {2 T7 o
- k = 0;$ b" q/ {5 o) a( q3 G# {
- }
% h; ?7 U: O |2 h ^# c N - setComp(g, 1);
% o: ^2 v# R+ N6 c, p - da(g);. X0 Z9 |" R1 y2 i
- let kk = smooth(1, k);//平滑切换透明度3 l- E- @" F1 z; I; D5 u
- setComp(g, kk);4 k4 x7 }' p. E, p9 k0 `
- db(g);
7 z& w9 h5 g. u - t.upload();
5 E" T' q+ U! i' T- m3 ? - ctx.setDebugInfo("rt" ,Date.now() - ti); d6 G ^5 Y Y" }. i/ k) N( d
- ctx.setDebugInfo("k", k);
8 w' B; v$ f2 I3 s6 _ - ctx.setDebugInfo("sm", kk);
, k$ r0 R# Z' H- X! A. N' M0 B - rt = Date.now() - ti;
( q3 F+ q/ I& i3 K9 r - Thread.sleep(ck(rt - 1000 / fps));0 Q+ J6 y5 K' v
- ctx.setDebugInfo("error", 0)
W. _7 t% q; X$ w8 ?9 }% ~' b7 p - } catch (e) {
" t- H- O$ \- f2 J - ctx.setDebugInfo("error", e);$ |3 ?8 d+ @& T, z! U7 L. Q( C
- }2 p1 w: w8 e6 V' ]* C& [! c3 E9 S
- }4 a) Y. Y& x+ r7 w4 Z& o$ ~' w
- print("Thread end:" + id);
. D( N: H9 \7 y( ~# x - }% R3 d9 _- M9 V! o' h- U+ |
- let th = new Thread(run, "qiehuan");
. ^4 g4 a9 V9 @$ K; e& y - th.start();+ s' N0 w: M, N: U
- }
; R* K4 m) ?$ M
) I- T9 W3 @+ @. _4 v' S- function render(ctx, state, entity) {
- b: e5 g* N* H$ g - state.f.tick();1 i7 i d$ m9 G9 J2 R+ w- n
- }$ N4 Q9 C6 a0 g/ C
$ V7 _: A4 A( p. W! A/ H$ e$ E- function dispose(ctx, state, entity) {
6 N! ?2 _% ]5 k U - print("Dispose");$ B# E: j( p) V! E0 F, m7 o
- state.running = false;
! r8 M! h/ j9 `! |* s2 Y( G4 B - state.f.close();
* l* ~* I0 G9 i: t( t6 z - }! T x, X8 L1 d8 R( k
' h% V' v! I, j/ Q6 o1 h( s$ Q- function setComp(g, value) {9 F; f* z( g. ?# T" G! n/ w
- g.setComposite(AlphaComposite.SrcOver.derive(value));
; Z3 h# p. b/ s2 g1 i t - }
复制代码
$ h" h# { y, T0 M& z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。. g+ l6 O2 c1 N: _- H y' Z' E+ G: u d3 s
1 v2 y1 t4 B. g) M! o, K2 J
( p F% N; m$ N- H+ q, \4 J. i0 U顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下); k6 u0 _3 S+ l* u* L
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