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# h' P+ x! Z% t1 P# }/ r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。
5 P& f. }4 g& x n- importPackage (java.lang);
/ ~( y! o) ]6 C - importPackage (java.awt);
- y" l8 d' n+ A# ^" O - ( ]" k: k* O& ^/ l) U4 T
- include(Resources.id("mtrsteamloco:library/code/face.js"));+ G; w: m1 r* J' i
0 U- M5 d; d( x0 A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 a3 \0 B# ?+ p) n* H0 y1 I
; I) o* a$ H& `4 W4 f8 \- @! i% ~- function getW(str, font) {
( R4 z! x: E6 O+ q: c+ X' A - let frc = Resources.getFontRenderContext();
& E6 ~5 Y* z9 l+ ` - bounds = font.getStringBounds(str, frc);$ [0 J/ d, L. \. D6 [, V
- return Math.ceil(bounds.getWidth());
3 {4 J. N- j- @+ Z - }
" W j$ ^/ v" L - 9 ]7 j- I: |+ H+ r2 A+ a# n& Q
- da = (g) => {//底图绘制; x- A" n2 F" t. K5 s2 n, r; C
- g.setColor(Color.BLACK);
/ H9 d% G7 Z9 G" O1 O5 ? J3 W) l - g.fillRect(0, 0, 400, 400);# f2 U( T2 ~+ D$ p! Y1 U) C
- }2 P/ P7 M9 R; r% Y8 i& F
, C" m" {( B2 c" U- db = (g) => {//上层绘制
0 K3 y5 ~8 l" R - g.setColor(Color.WHITE);9 S* a' `$ ~8 p; w5 S: K
- g.fillRect(0, 0, 400, 400);
) q( V# |+ i8 h: ?) z: d - g.setColor(Color.RED);6 e% `' g' z$ T
- g.setFont(font0);
- {: [4 R/ e* M+ t; M: ^: k/ x - let str = "晴纱是男娘";
( p% B/ s4 J7 n - let ww = 400;
: F- f3 G% b$ g" Z! n - let w = getW(str, font0);
+ t7 q% t* @: q( Q7 X( L6 ^ - g.drawString(str, ww / 2 - w / 2, 200);
4 Z7 D. q- O# s& a - }
$ J$ \3 ~. I. P a" F; R5 C
0 @ s0 Q" T9 z- const mat = new Matrices();
: N( e+ H# {4 O7 G - mat.translate(0, 0.5, 0);& T6 b" Z3 |2 S- c. S
- 5 n) S( `4 S! `( x g
- function create(ctx, state, entity) {& z" L7 w7 a1 [! V$ O- q/ j
- let info = {
. h1 ~- Z t1 _0 \ - ctx: ctx,
5 S. W t, X& y - isTrain: false,
! e; l6 `$ W9 ? M& ] - matrices: [mat],
$ F+ ?8 i# h& ` ?7 S- Z9 r - texture: [400, 400],
5 T6 Z$ \ X) {& p$ l9 d5 n9 O( Z - model: {
: w! w' a0 ~7 b% b- P6 r - renderType: "light",
4 {7 R# `( \7 I) H( m3 O* N* [8 A - size: [1, 1],/ ?% a1 }$ ]6 x3 W( Z6 B! w
- uvSize: [1, 1]) _8 _3 u& Q; `/ F* ]! W: P- ?
- }: U( u+ m0 [( B2 ^3 `" [
- }
9 |1 V% L5 Q: h9 Z O2 G$ f - let f = new Face(info);2 H+ _, q& U7 U" o
- state.f = f;. L8 e% p- t4 m: {! N+ V
4 X. w6 N6 ?4 l5 |* ?+ d- let t = f.texture;; |, L! C9 W1 Q/ q5 B
- let g = t.graphics;
/ c2 F. Z+ C( d. b' X- w' s - state.running = true;
* X/ ]' v, I; w. W0 G: v& p - let fps = 24;
6 H3 @" a" j- e - da(g);//绘制底图8 \4 G$ n1 F1 X1 |' O
- t.upload();/ C. G1 U, M6 k4 o! J$ k3 R: X H
- let k = 0;8 {) m$ L8 |6 r& Z( T
- let ti = Date.now();* I: f. A8 V0 g2 h! x
- let rt = 0;
$ P5 U( I/ E" h, {* ^' o5 r2 [% _" Y - smooth = (k, v) => {// 平滑变化# a9 _6 Q! z* T. |# c
- if (v > k) return k;+ \; i5 t0 a; J1 F( s
- if (k < 0) return 0;
: j/ S+ D# f1 @! Z" _ c% f9 n - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 P0 }" O6 c- [. a7 h3 I+ E2 _# l# | - }0 K& U* E+ d' N! ~9 h
- run = () => {// 新线程
9 {% Q. A( [# ]" T - let id = Thread.currentThread().getId();
5 c0 ~" _$ n/ T6 s - print("Thread start:" + id);
7 ~4 f% l/ d0 y - while (state.running) {
* A) z% n# c8 Y2 l - try {9 h( D: b& B& }# w- q. T8 v
- k += (Date.now() - ti) / 1000 * 0.2;+ L5 c6 U# E* p' a, x* F
- ti = Date.now();; Q! V$ Y3 c- Q, ?
- if (k > 1.5) {/ u5 F K# }: Z, W; a# K) n
- k = 0;2 L! B8 e8 `4 P- r# D
- }$ ~4 p4 z/ ^( O, E, H$ E/ e' D; ^
- setComp(g, 1);. x5 d6 ?0 Z. L
- da(g);
- x `0 w% E; @0 G4 n* _' D - let kk = smooth(1, k);//平滑切换透明度6 j. y( c& n. m9 w' E
- setComp(g, kk);6 n+ a' f0 _/ X" a
- db(g);+ T/ g3 \) K7 h/ ~0 q
- t.upload();
- u: d; p4 A, R( R: U - ctx.setDebugInfo("rt" ,Date.now() - ti);0 c3 f, L1 r- J& @/ n. @1 q- }
- ctx.setDebugInfo("k", k);
5 R/ Y; u7 p2 s% [ - ctx.setDebugInfo("sm", kk);; p D# g: B2 W" l
- rt = Date.now() - ti;1 s; d) n: M* P) j4 u
- Thread.sleep(ck(rt - 1000 / fps));
7 ]* W6 _0 R8 y6 ?4 B! o - ctx.setDebugInfo("error", 0)
. m% a: f) ~4 K& g, M - } catch (e) {
! S$ ]' U9 B; z. a4 d - ctx.setDebugInfo("error", e);% h1 q2 T9 p& j( A9 O
- }0 p/ X* Q7 [4 J% _
- }9 {" F7 a$ C: z: J
- print("Thread end:" + id);, b o& W" J# d
- }, z1 v l5 D3 Z1 h F
- let th = new Thread(run, "qiehuan");
2 m& c+ I( g7 U( h% P - th.start();
# G# ?% o6 u% Y+ y - }
4 @% s, s5 t0 M1 ]2 ~ - J# W2 _) L: W# w
- function render(ctx, state, entity) {
- ^3 K7 x# |0 _: l - state.f.tick();
; r6 f. ^* i* }7 W2 O7 V) p- D - }; F& }4 ^5 B" q+ m+ a+ A9 P6 @
W+ x+ M8 u0 P) o! A- function dispose(ctx, state, entity) {3 O3 E" a7 b2 ]! M2 n9 ]
- print("Dispose");& g) p+ V8 J& s+ N2 ^# x* }) D
- state.running = false;
+ O5 T5 a- k% i2 W: j/ W, u - state.f.close();8 T: a& Y5 z: H+ @9 F* Y Y( k1 K
- }2 w, `7 j, m4 E' u u
- " T: S8 b( y: E1 q+ M0 @
- function setComp(g, value) {/ H2 m f3 Q* r ] r! |
- g.setComposite(AlphaComposite.SrcOver.derive(value));! y6 U! n) C _' `
- }
复制代码 ; K+ o7 H. r1 m% {
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。6 L$ a# O% s- q' [( q0 |" {. R
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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)
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