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! _; T9 E4 s! c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 d& T' a: U. I. F0 V- importPackage (java.lang);
6 b# f) y( e' _0 G9 J - importPackage (java.awt); {: l3 l0 H% j& C% Y0 ?
- ; o4 @/ \* ^7 \; X! v3 @
- include(Resources.id("mtrsteamloco:library/code/face.js"));9 M6 \) y" W# ]' @( P
& G' p0 @' c$ i# i* R0 o! B- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& I/ C% b1 V; y* T9 E
$ D `; D% ?5 r. c- function getW(str, font) {
6 |, h( h6 o8 x% M) \5 z. _, [) `/ k - let frc = Resources.getFontRenderContext();
+ B7 \+ c, E& }" B: U; s' y; { - bounds = font.getStringBounds(str, frc);
4 z* {8 s7 m. a" w! g- a - return Math.ceil(bounds.getWidth());1 k: h B. f* @ _
- }0 C2 Y( S) u0 M
" Q, g- `1 G/ ^* y4 C3 X# u- da = (g) => {//底图绘制
; h, C+ V% V( {8 v - g.setColor(Color.BLACK);
$ ]; B, ]* K/ Q - g.fillRect(0, 0, 400, 400);: u/ F* [) ]6 N; t: \/ w
- }
. L# q% R3 z( }7 [ w- s+ ~: i/ O - 5 ?2 I4 W, s6 h! |" k# Z
- db = (g) => {//上层绘制
" n; i9 n5 q& h) r; R2 _ _ - g.setColor(Color.WHITE);, ]8 ], P& M5 V7 C: _0 e5 a
- g.fillRect(0, 0, 400, 400);
: t) w' H1 n* m& w" p1 e! c! l8 h - g.setColor(Color.RED);
- K: k+ S, T0 k3 O* W! g - g.setFont(font0);8 ]' G8 l# S; j' W h6 `/ u
- let str = "晴纱是男娘";
1 j. {5 R7 p0 k7 v& F - let ww = 400;
: O& |: f: {+ `" d+ {# _4 ` - let w = getW(str, font0);
1 w1 g8 E- j+ Q; f - g.drawString(str, ww / 2 - w / 2, 200);$ k0 r3 Y4 S3 u
- }# `3 i; {# h& g* _9 O
- % W6 P* k* y( `' z& q3 h8 V
- const mat = new Matrices();
1 Y2 _6 g0 E( L2 o% [ - mat.translate(0, 0.5, 0);/ _7 T5 }9 T& A D4 c7 U5 W
6 N8 F S4 X$ k; a: {) R- h! _2 ^- function create(ctx, state, entity) {+ U5 x1 ?# L# \
- let info = {
5 R/ l& c" L$ m; m4 W0 a - ctx: ctx,! ~' ?; z$ v9 U4 K9 J
- isTrain: false,
& O! G; p& E# k9 s5 ~' i - matrices: [mat],
. f$ ` B4 Y: `' b; B5 A+ s+ `/ t - texture: [400, 400],1 j* j! D# C1 M/ H* N
- model: {9 Z5 z# M$ {/ ~* O
- renderType: "light",4 _5 {0 n) a3 h5 P! l$ G
- size: [1, 1],
, l5 i+ A6 h+ X! x5 j2 n - uvSize: [1, 1]
# a7 G. Y) ]% b& K9 c( T7 d/ k/ P. G - }
- V2 U4 U' S4 C; p, }* s4 H8 K - }3 [: o5 d4 g* v+ _# [5 E8 j
- let f = new Face(info);
1 A1 ]8 p- U) k" z4 T - state.f = f;/ `2 w! I/ z; A, r; s n6 x
- ) m, X" Q3 i. k2 g4 I
- let t = f.texture;; t5 E4 r9 [; N+ a( w7 U
- let g = t.graphics;5 T9 Z* ]! d+ @( k
- state.running = true;! _" `9 Y/ F/ K7 u. `) K8 ?
- let fps = 24;+ C* h* a) r; a5 f2 a
- da(g);//绘制底图 f: c6 L: t& r* t
- t.upload();
9 J1 ~ M. @& `. N; B - let k = 0;
" ^0 Q6 U! N; X) d2 N2 F8 Z j2 Z3 h+ m8 t - let ti = Date.now();
6 Z: r, t+ D# J4 |/ f - let rt = 0;
7 R7 l& X( d5 A& K& D6 ^ - smooth = (k, v) => {// 平滑变化6 | e5 i% n3 \9 C- G
- if (v > k) return k;7 _, B, O: ?, I* S& r
- if (k < 0) return 0;) ? Z, S/ u' a/ K- W: ^% ?
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ s. b. X1 g0 I/ U8 _7 \" p% @( e - }
2 v/ ?! b1 S1 p- l) [ - run = () => {// 新线程2 V- `" f- f9 s7 t- e
- let id = Thread.currentThread().getId();
- b( D" s) L) R - print("Thread start:" + id);
. u' r: [4 [" S ] - while (state.running) {) m B5 `- i* w5 A7 _4 K( t
- try {
' O- L! k) z' n4 u - k += (Date.now() - ti) / 1000 * 0.2;
* j8 N, V' @) A. A! N - ti = Date.now();
7 l7 n7 X8 K) A" } - if (k > 1.5) {
; k! w9 z6 d+ k5 ^# @, Y - k = 0;
% X' ^8 a: V" _8 k7 \/ s; e$ x - }; C% I. n2 a% U" k6 s2 Q6 M
- setComp(g, 1);
3 A6 l; F) K+ X+ v, w - da(g);
) |8 n0 w, Y+ a! H- ~% W h) r - let kk = smooth(1, k);//平滑切换透明度
6 u6 L0 I u' H F; o0 C5 u- w+ S - setComp(g, kk);0 i. F( ~ F$ {" c- D& @0 f
- db(g);) r5 W5 s% S% s/ m8 I, o
- t.upload();
$ S3 V. {9 B/ e$ l - ctx.setDebugInfo("rt" ,Date.now() - ti);
- t+ D. I2 ?! Z0 o u! _ - ctx.setDebugInfo("k", k);
0 u& n& M7 |5 j! G8 ^ - ctx.setDebugInfo("sm", kk);
5 w- A( W; M v0 F - rt = Date.now() - ti;
3 u. @- I* E4 A+ T+ Q - Thread.sleep(ck(rt - 1000 / fps));
. h: K1 } h( Q. }% I0 x - ctx.setDebugInfo("error", 0)
2 c& |7 o6 L8 F" Q5 f7 D - } catch (e) {9 ]. ~- S5 u- m) u4 r# S
- ctx.setDebugInfo("error", e);
, ~# ^; ~# `7 a - }
. C- Z) r. d8 s' c - }5 I6 f, h8 T1 Y* J
- print("Thread end:" + id);! [5 }$ b4 h' I! S7 |; |
- }
( s+ m) A/ v! H- Y - let th = new Thread(run, "qiehuan"); j/ B% z7 k) v& b; d# c% L
- th.start();( \( ^$ E+ H& h8 _
- }
3 E7 [& i2 t+ J# M9 r
3 Y- f- i( l, R1 @9 Y; Z+ D0 b- function render(ctx, state, entity) {
; x3 g5 ~, J& q, w( _0 Q - state.f.tick(); b" Z$ N# ~5 N
- }) a: z# Z! w$ @. y" X1 b# _7 h
2 F/ @7 m( t0 r) l6 h: F- function dispose(ctx, state, entity) {' O+ C1 R& V. b) V
- print("Dispose");
% o- [' v' k7 H$ ~ - state.running = false;" R* s- _% R5 G/ N
- state.f.close();
l8 Z1 K9 x! V! k" y( } - }
9 R! W+ N4 x8 o, t - ' g6 ~4 Q0 U+ p2 y+ s+ i1 y
- function setComp(g, value) {
' b) n: v! n. G9 G$ T) C8 `- J: F - g.setComposite(AlphaComposite.SrcOver.derive(value));2 O4 k5 j1 w" b- k- K/ k
- }
复制代码
2 `9 F. o+ i% w! a3 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。
$ ]/ w% A, b! `, z! ?% F. e* g
2 W- t" e; E+ l- p1 l; {; X1 \7 n+ z) k. k; D
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)' ^' Z# y+ W' @/ w1 v
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