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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。
& j# N$ l; K8 q) K c. D- importPackage (java.lang);
1 G/ \5 `% v: z2 K8 |* Z - importPackage (java.awt);- `" r7 f: v) v7 q i1 ^6 x) Q
% G* j. {) K- L6 r8 B: H+ v- include(Resources.id("mtrsteamloco:library/code/face.js"));, k$ _; p8 Q; U4 R% n
- 8 t: }: r5 \5 R! a4 C, C
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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4 [9 y& S7 X+ m3 d0 j/ I: ^- function getW(str, font) {
- }' V, b. l) S" i9 j! m# E - let frc = Resources.getFontRenderContext();$ i& A2 G% q; k- p2 H; Y
- bounds = font.getStringBounds(str, frc);
* y2 {. H: z3 c6 K# ~ - return Math.ceil(bounds.getWidth());; u- D, D8 h8 O, E* Z1 _5 T: k
- }
5 ]6 }5 _; L: p: E, g
3 E& Y2 t( F- J1 S! F/ L; Z3 r9 R- da = (g) => {//底图绘制
/ O# V7 @4 l* u( w6 [ }. ` - g.setColor(Color.BLACK);* i4 a# R$ f) @$ Q/ ~9 t
- g.fillRect(0, 0, 400, 400);
5 I" Z. s2 Z& }& ^ - }
; h3 s) E& I7 \ - # C. A | w/ P2 d/ N
- db = (g) => {//上层绘制! ^; [4 V* u9 [4 ^( n
- g.setColor(Color.WHITE);$ |/ c3 ?. T6 O0 k$ }$ e
- g.fillRect(0, 0, 400, 400);
" M1 G# G; b0 b. k! g - g.setColor(Color.RED);
# h' ?: o! i5 |+ J& \' M4 l - g.setFont(font0);
2 \$ E4 @" L0 M2 b - let str = "晴纱是男娘";
. L, I% ~ h4 x8 V5 Y - let ww = 400;
5 m) p: Q; g( x0 ]' l2 C" B) ? - let w = getW(str, font0);& [$ b* f5 E$ m! _9 \+ d, H" s
- g.drawString(str, ww / 2 - w / 2, 200);' ?* |& y8 N6 }, w! q$ H
- }
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- const mat = new Matrices();# L1 P6 t" e4 Y
- mat.translate(0, 0.5, 0);0 {# ]7 D' T; Q/ [
- ' ]0 T2 G3 }# a
- function create(ctx, state, entity) {1 A" W/ p! Z! h. X4 I/ J% _+ \$ D
- let info = {4 S; E2 s$ h" P! f
- ctx: ctx,: v9 z1 n; x: E( W. P* X
- isTrain: false,
( N( L! X F# Z4 [9 R0 @& g! q D0 U - matrices: [mat],
9 W$ K) a, U- i) R+ f, a: T+ g% X8 o - texture: [400, 400],: U* T- p/ V7 Y- s
- model: {' D. c, D& ~ ]- y( {
- renderType: "light",5 U& \" |3 ]/ p! Z6 Q8 Q7 p z- }
- size: [1, 1],
. ^0 J7 ?- U' U( b - uvSize: [1, 1]
, U9 ~ B- Q/ {" ^4 b - }
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- let f = new Face(info);
5 D7 y: x3 E! q6 [ - state.f = f;* M+ u# n- H7 B# g* ~( e0 {
- , S/ A; L* T7 \
- let t = f.texture;
4 D* C3 f7 W E* S0 M6 `( x - let g = t.graphics;
% ~0 ?+ Y# N3 f2 M# J& ^ - state.running = true;
. w, I4 S/ J$ z B - let fps = 24;
6 A ] H M0 g4 \ - da(g);//绘制底图) H9 [: \9 I( }& V
- t.upload();
0 ?: ?) ^! t" `1 K - let k = 0;- Y$ ~( J6 t( D4 @5 A, D
- let ti = Date.now();, @# f, n2 U( y" b6 L
- let rt = 0;
& ?8 i0 I8 A& ?* ~0 d" U - smooth = (k, v) => {// 平滑变化
* X w: c/ m f% y- }# T, S - if (v > k) return k;
. @0 J% y2 c8 p' J0 M( {" N - if (k < 0) return 0;( {+ x5 f/ h3 D5 `' P! o U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;7 r2 J% {& S, \; S1 G f+ m
- }
- \# S( o4 o! N$ q% x& ]* U: y - run = () => {// 新线程" V _9 ^( ?/ W. W. M- D8 o# X
- let id = Thread.currentThread().getId();4 L) g$ V1 G9 L( @+ m4 N& ]! D
- print("Thread start:" + id);- N3 o# {) I: u8 A6 I- x
- while (state.running) {7 _$ I& [ |. g2 t' b0 s. x/ e+ c
- try {
2 d) ^: U1 D1 I, [7 c - k += (Date.now() - ti) / 1000 * 0.2;& ?$ n3 N' O. U
- ti = Date.now();2 o. \( e3 z2 [6 _8 u! N
- if (k > 1.5) {+ A( ?4 w* R( K0 b5 E) T& M b
- k = 0;
, b7 r# K. M- k9 I$ M - }
( \" ^) r, j3 Y" K: m2 j2 a - setComp(g, 1);5 s# k: P& n" l( @- [% j3 S
- da(g);) K# r* I# C( k) d3 Y! D, o
- let kk = smooth(1, k);//平滑切换透明度
& n; v* d* h, K4 d6 h - setComp(g, kk);3 X6 a/ ?+ j% \* \" t
- db(g);- Z; t+ L9 B: |$ p3 Y
- t.upload();$ w& ^; s4 d* G- H, _7 M
- ctx.setDebugInfo("rt" ,Date.now() - ti);
& F2 a# e0 F/ Z! Z+ ?2 Z( m - ctx.setDebugInfo("k", k);0 [4 B+ ?* ^( Z. r+ L1 X2 m3 `
- ctx.setDebugInfo("sm", kk);3 S' @& |: p/ _6 k( y# i
- rt = Date.now() - ti;
6 y5 N! ^+ F7 _4 g4 z - Thread.sleep(ck(rt - 1000 / fps));
6 Z7 _/ h7 R3 V) P: |$ e( J - ctx.setDebugInfo("error", 0)
& r* \/ i4 O. o. }% B) o - } catch (e) {2 B9 j" T: I, {1 P: e
- ctx.setDebugInfo("error", e);2 J: G$ E4 w: p% N1 o( r( j9 R
- }
0 D; |3 U" {# g, V, H6 F. o: y - }/ _* p' O2 K6 B% Z( Z
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");, X E t# n( E/ J
- th.start();
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8 H# F( n/ K% Q0 Q3 J: [- function render(ctx, state, entity) {3 [2 ~1 l& `" r! E, n. c
- state.f.tick();$ Z+ A* }$ \- S, b
- }+ A1 t: i+ F. O9 x8 {$ m/ j
- & H3 L' Q2 S! }$ P
- function dispose(ctx, state, entity) {
$ {3 S& {/ e. e9 E% K2 l - print("Dispose");
. @8 z# G( [# ` - state.running = false;6 `! a9 ?* F5 s* T) R
- state.f.close();
- Z& r& p& f! }- r3 f, v% L6 d6 R - }- ^7 c! U4 k# a5 w" m1 U' Y1 Z
- # h/ P! T: [% P' N0 O. |" }+ G
- function setComp(g, value) {
5 x2 u, F* u, G/ D8 E# d- {* m - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 ]" j7 j) f& e. I - }
复制代码 8 [# r6 m" s4 u! f" ^! `5 j" q; Q' q9 `
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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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)# ]9 ~* ^& Q; a
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