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3 l' q0 i3 j. n7 \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。
e, ~6 H3 j& a( y/ C2 S6 }0 q7 p- importPackage (java.lang);, X4 B. t, V) W6 U' M
- importPackage (java.awt);# I* M* }6 T9 X- w- K: [8 I
/ j- B) ]1 Z" z& S0 T- include(Resources.id("mtrsteamloco:library/code/face.js"));
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7 Z" H7 D' Q1 d8 s- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
( E: h7 K- T, j! U - let frc = Resources.getFontRenderContext();
: I" L" m6 {/ b" ^+ F& p% V - bounds = font.getStringBounds(str, frc);5 ]2 d7 S5 I& N) D
- return Math.ceil(bounds.getWidth());/ u& X1 Z3 c) P/ f) n" N
- }
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) y0 a% `! _' c$ l' f* r" i' @- da = (g) => {//底图绘制+ Z, s) w7 e8 V& G, c/ ?, P& m
- g.setColor(Color.BLACK);
7 }) D- T; Z* h; x8 F9 c - g.fillRect(0, 0, 400, 400);' {5 ~- Z/ Z C J! ^* D
- }
& g0 O6 _" L8 V2 k2 I
0 s4 i( [; o/ y c/ Z0 c% l2 n F- db = (g) => {//上层绘制! w9 X4 y' h7 r% l% ~
- g.setColor(Color.WHITE);
) U9 d: I, d u1 Y+ h# t; d - g.fillRect(0, 0, 400, 400);+ u+ {7 }* v! k
- g.setColor(Color.RED);' W* ?2 C& W8 O
- g.setFont(font0);# p2 T5 X1 f' a
- let str = "晴纱是男娘";
& O9 }1 C/ Z- b4 @: a4 B - let ww = 400;4 J+ @. T1 P/ B0 Y
- let w = getW(str, font0);/ U& y5 i: D8 R
- g.drawString(str, ww / 2 - w / 2, 200);+ M/ X4 W3 U8 u- I4 q6 u
- }. s( |+ a& ^: v- i, B$ a2 Q' u
- " w) f& _. q& e$ b x- Z4 g
- const mat = new Matrices();
/ ?* S* V) R6 S% t7 D - mat.translate(0, 0.5, 0);
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) L4 a2 A% E* {$ i- function create(ctx, state, entity) {/ M h, b# l2 x# r6 j9 T; [/ H
- let info = {
; [# S: O6 ^2 j$ J$ I% M2 J - ctx: ctx,6 k2 N: y" t- ?4 k" c, J8 v7 P
- isTrain: false,
* z" z# [8 E6 Z3 E% z - matrices: [mat],1 ?5 w: X6 S; v' x6 v: Q7 c; f
- texture: [400, 400],
g5 C' Y8 Y7 W$ k P7 Q - model: {' m ^9 v" k# a, F6 u) I ~
- renderType: "light",
4 J) w5 z( C [6 g! n# [ - size: [1, 1],5 F) ^( y% l8 z" {! z6 z/ r
- uvSize: [1, 1]) z4 R& D6 z+ [# ]4 I" L
- }
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- let f = new Face(info);
2 S& e# D2 n! s0 Q$ A5 b - state.f = f;
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- let t = f.texture;
* }( a5 y1 J- V8 U8 v3 Y+ g8 ] - let g = t.graphics;
# H! ?' W" z3 \3 W5 f" u - state.running = true;; E& c: a' i1 Z! |) a j
- let fps = 24;/ r5 H$ S, @. ~# J0 X! [7 U
- da(g);//绘制底图/ P3 i5 O/ O& h" ?: A7 Z3 |
- t.upload();9 c2 g1 G4 K( ^6 M0 i: ^: ]
- let k = 0;
- \4 F6 e6 x8 g, m - let ti = Date.now();
+ i& u: G: e, ]4 [2 j- t7 j - let rt = 0;" ^& u4 p r" C9 a8 o; ^# Q5 C+ Q
- smooth = (k, v) => {// 平滑变化$ u, \& Y$ M+ q# D* }0 n! `" Z4 G
- if (v > k) return k;
1 ^4 _9 C6 Q6 |) E7 q0 ` - if (k < 0) return 0;
& d% ?3 Z7 i& K2 {" k4 s- {. Z' i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程6 ]7 k5 [6 ?* M9 v4 P
- let id = Thread.currentThread().getId();2 J% q: [4 i+ T4 o/ @' B7 G
- print("Thread start:" + id);
# j7 a# O" k! p1 h% ]9 a% E, i - while (state.running) {
6 X: j/ Q2 E) Z: q% U - try {
2 ~2 x' c5 B- S9 T) L" _ - k += (Date.now() - ti) / 1000 * 0.2;
! S! T: ^1 A# } N/ m2 r - ti = Date.now();' _6 U+ c9 L; Q7 C/ Q$ O+ ?
- if (k > 1.5) {
4 S# B- {- \- Q& c# M+ { - k = 0;( w6 \( E' R6 A6 `8 S4 m+ l- i
- }
- y! n, g" e/ J6 I - setComp(g, 1);0 j7 q4 h9 s! i7 d
- da(g);- \& ^& Y* j1 A/ T' m( f
- let kk = smooth(1, k);//平滑切换透明度# ^# ~# ^2 K. u5 E1 Q7 J5 @
- setComp(g, kk);: W3 R' H1 I# l
- db(g);
* @6 D! H7 W T x/ _8 v - t.upload();# H H+ c3 |9 j: @' ?$ c9 D, s
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 ~. R/ ~! Y# p2 N0 `" U+ Q - ctx.setDebugInfo("k", k);0 x, [2 c, F4 v4 K+ F
- ctx.setDebugInfo("sm", kk); P: u& _5 ^- t Z8 O
- rt = Date.now() - ti;
l% ^3 ~0 j0 y, X - Thread.sleep(ck(rt - 1000 / fps));$ u4 m2 K* F C, g* j
- ctx.setDebugInfo("error", 0)
( M. h% u: j/ v - } catch (e) {
9 t5 ?% x# Z, U5 h2 l# G% R! `" G+ p - ctx.setDebugInfo("error", e);/ q% G+ {; x) g% u1 j
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- }& T" N% a1 I" e3 Y, Y2 P; [$ |
- print("Thread end:" + id);
$ |4 y/ L; _: }4 j" p4 b; E# @7 G - }
C( L, E' i7 d% x - let th = new Thread(run, "qiehuan");, c2 f/ @' V: d o, M$ H) ]
- th.start();
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3 e6 x+ W7 `: D: q5 S- function render(ctx, state, entity) {' k" s8 P5 H5 P* x
- state.f.tick();: y! B; \8 Z$ x* P* N7 k
- }
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0 m$ G5 c* t) W& K+ Z* _- i8 _- function dispose(ctx, state, entity) {% F3 `+ }& H: D, b+ \, M$ z
- print("Dispose");
6 F. h9 d- F I - state.running = false;
% Q6 B6 M0 u% [7 W1 G1 P - state.f.close();5 K( B1 h& f% x5 F2 }
- }
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- function setComp(g, value) {; ~$ O& _$ k6 d; ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));
# }7 Z8 a+ E; o0 |5 ` - }
复制代码 : s: A5 V: n+ v4 L# p3 ~- 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。$ z0 D- Q8 _0 u# Q) w
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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)2 u: {2 Y( _# T5 R
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