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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。; ]( \6 \0 r* p; e, Q* a
- importPackage (java.lang);
) y7 F u( |# }, ?) g+ }& m - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" T: U" K( l* I1 W$ Y6 g' U* S! b! M: K
1 o/ J% @: f+ W8 R- m Q; @- function getW(str, font) {2 d5 I7 R, T w. _' P! S! ?1 O) |
- let frc = Resources.getFontRenderContext();
3 L- z% j+ i: I1 m; j) D# ` - bounds = font.getStringBounds(str, frc);
9 F1 I/ r3 C# N4 j: b2 z - return Math.ceil(bounds.getWidth());( A& K4 \5 Y; c5 Y7 O7 ]2 k
- }
3 F' }( S: s+ [$ w+ L- n* j4 F: ^ - 8 s) S! L5 ]' q& K; Q' D3 W+ i
- da = (g) => {//底图绘制
. n1 f+ ?$ N a1 D. W' }% e - g.setColor(Color.BLACK);. ~: s$ R) L0 T6 m
- g.fillRect(0, 0, 400, 400);
4 l+ C% Z! K h! I/ D7 S - }
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' S6 e' Q4 n7 E; j- {: ]3 r; m- db = (g) => {//上层绘制
% g3 P- A! D' w4 J% T( I- O/ H - g.setColor(Color.WHITE);5 v% a2 ]8 \4 _' R) a, F
- g.fillRect(0, 0, 400, 400);
0 h% J* J7 S: p% O+ B8 r& j4 R7 K - g.setColor(Color.RED);
& m, B- D4 C4 P' i% [- B; u - g.setFont(font0);/ u1 L: c8 Q/ c! D, U
- let str = "晴纱是男娘";
" ~% t8 q! x$ W: M+ r - let ww = 400;3 f' l. e/ O8 W( V# D6 S: G+ |
- let w = getW(str, font0);
; M! b# B# p3 Q- } - g.drawString(str, ww / 2 - w / 2, 200);# b- b* _) z" s+ g. P9 d2 z
- }7 ?' Y3 N* y: k/ h! M) v- ]- y
- 7 n# \/ w0 y$ _3 V
- const mat = new Matrices();* ]5 c1 N5 P$ p: f9 I
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
' D7 }4 i4 D" R3 d* | - let info = {8 b2 P& v: |9 X
- ctx: ctx,
* M2 K# g, ?/ w. g - isTrain: false,# |: c; N% I" p1 F8 e0 v5 _, n/ E
- matrices: [mat],
, w- @# ~2 ~8 o% O* J. t; B* w% m - texture: [400, 400],
2 B0 u; `% U8 b6 t4 g - model: {$ d: o% L& G, z
- renderType: "light",
/ g# C) z& {6 t3 ^( q- T1 U Z T B - size: [1, 1],
# T$ Y0 W2 {5 I8 w5 b. t - uvSize: [1, 1], V& d! f+ y* Q
- }) |* W8 Z* z8 B2 I3 q3 b
- }
5 L- g$ r, F L: K8 ? H - let f = new Face(info);
# f, b' o% A1 {% @- i1 \* y! e - state.f = f;
, b8 D- h7 L& j* U" p1 N! t
% _$ N6 _& G* n5 F5 P- let t = f.texture;9 o. V8 D G5 }
- let g = t.graphics;! L; l- f: c3 U8 ?
- state.running = true;
5 I. F9 Q' ~1 Z* ^' P: g F - let fps = 24;' `7 \* c$ A; F) d# u, p( t1 a9 Y- |
- da(g);//绘制底图& G+ z" M3 ^% h* G7 v. A
- t.upload();/ ~# ^. v' G$ X
- let k = 0;& H3 t5 r/ p6 i/ B. N
- let ti = Date.now();
* W8 b1 }# {6 H* `! T3 ]$ P - let rt = 0;+ x* A- ~3 Y, A5 `
- smooth = (k, v) => {// 平滑变化
. p7 e/ {9 @: e4 L, T - if (v > k) return k;
/ y+ d, B; W) Z E - if (k < 0) return 0; `* t; h' J) u. [5 c
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 {/ Q. ]" D" F4 i/ ~9 T: W2 j
- }
, }3 f1 g$ F& ~+ _- J9 k+ G - run = () => {// 新线程$ E3 G! K! `: v+ V, B
- let id = Thread.currentThread().getId();
# g, ?* P* u9 E0 O; Z5 e) O- G9 Z - print("Thread start:" + id);7 P; z9 a, q4 E
- while (state.running) {" N8 k6 `( @2 G* A- c/ w6 P
- try {: F" U0 S' S" j8 P4 g
- k += (Date.now() - ti) / 1000 * 0.2;/ o$ E5 R/ O! D
- ti = Date.now();
7 h& Q U- c* {. j - if (k > 1.5) {
3 u* I8 D6 ` Z0 a. ?: v - k = 0;. h1 n# v" U- I* c. w0 k6 @% [
- }
/ _! }* \# d: p+ l. p1 \ - setComp(g, 1);3 j# E) E# K3 J! q2 a/ `
- da(g);
6 m+ \/ L6 W9 \' w3 r, w - let kk = smooth(1, k);//平滑切换透明度
) A w0 B* ?% T# l) |; T - setComp(g, kk);: p! s6 @) l1 c# r2 ^( V
- db(g);/ m. B; Q1 |, q: a' X3 T
- t.upload();3 U3 h, y, M+ \9 e9 V7 ^0 B# u
- ctx.setDebugInfo("rt" ,Date.now() - ti);/ K6 k$ E0 k* {% t- y; w% G2 T
- ctx.setDebugInfo("k", k);3 m, V, x! t( g1 Q' `/ X$ m0 t
- ctx.setDebugInfo("sm", kk);
9 I u* S$ Q4 L% J - rt = Date.now() - ti;
; |1 s% ~& k: K; {! ~ - Thread.sleep(ck(rt - 1000 / fps));
% v# A. U, N8 C9 |: e* k/ B; {( b' X, m - ctx.setDebugInfo("error", 0)- k# I7 P q* n+ @* O, ]8 @
- } catch (e) {
6 A2 ~% U3 T2 F" I' n* J- T, [ - ctx.setDebugInfo("error", e);# y0 s. O6 P- q. \4 I: B* L5 r
- }. n( u- l" `6 u5 Z F9 {
- }
o4 ~$ U) b" q u# g - print("Thread end:" + id);' [6 a I9 v( e {( X
- }. x3 X2 V( H7 {% S
- let th = new Thread(run, "qiehuan");! ~$ k R% u1 z/ G9 Q" s
- th.start();5 m+ v6 E8 I1 D0 F& Z
- }, F i* Z; g! d0 o6 J. s
- 3 h4 G# `7 R+ A5 ?8 a
- function render(ctx, state, entity) {
+ ?( K5 U5 Z/ ~, K/ f' b. [ - state.f.tick();! q2 p% e9 }* c- Q ?
- }
; s) c& Q* ?+ x
) ?9 X+ [ G5 _, Z1 o$ Y! E- function dispose(ctx, state, entity) {. h; z7 V" C5 i# c
- print("Dispose");. h# c8 z. {3 f
- state.running = false;. b% m4 Y/ `" J0 m$ O0 j
- state.f.close();
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7 C4 R. p4 G4 e0 ~0 {9 b/ m$ W- F- function setComp(g, value) {
! d, |6 m9 |+ k6 D3 P5 y - g.setComposite(AlphaComposite.SrcOver.derive(value));% L1 K9 h" R- f1 F+ N8 J8 d* @9 Q1 Z
- }
复制代码
" w; D) Q, K2 _) n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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; c+ h5 Q X6 G3 A; B6 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)
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