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, W t; `2 u' T9 n" r6 Q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。
' u! D" J0 I. d3 l- importPackage (java.lang);
. M, ]; S6 M7 T t0 y - importPackage (java.awt);$ p. [5 s: Y$ A, O2 P5 H U3 R8 A, D
- . t% L: x7 @; g
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 M% m! r3 N4 {: M8 D& w/ b/ X$ K
- & Z$ w2 B& ~. x ~
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
# e# p4 t w4 P R% m2 \
0 f% M7 r, x' g/ X* k) m% F3 z5 l- function getW(str, font) {' L% [ p3 e2 @
- let frc = Resources.getFontRenderContext();* b2 g/ Q( E! ?% I3 c! t
- bounds = font.getStringBounds(str, frc);
& o; v6 j6 E1 t, ^9 t/ ~ - return Math.ceil(bounds.getWidth());
$ |. D/ z7 p' ^) H5 l - }) @7 T4 ]6 [7 [) }3 p7 _) `8 F
9 f1 g8 ]# {( l+ {9 h! O& g- da = (g) => {//底图绘制
: @: Q9 L! g; J5 G0 g - g.setColor(Color.BLACK);0 j! d9 i; e, v, @- E
- g.fillRect(0, 0, 400, 400);
4 W7 m4 S4 R2 D% T6 r - }4 w& M; s; G$ v& n ~6 w- ` N
6 Q. E8 p- [. A+ C6 q- db = (g) => {//上层绘制
2 u9 l8 ~. P' Y% R - g.setColor(Color.WHITE);
! z" H1 b* c6 l# E& j/ ~) T- [ - g.fillRect(0, 0, 400, 400);) @! ?* a& n; ~1 u# t% }# Q$ Y
- g.setColor(Color.RED);# X" I0 r& w7 t# m
- g.setFont(font0);
9 y4 a C" y2 D# V- ^! G - let str = "晴纱是男娘";
8 J& N! N `) |: I - let ww = 400;
Q% k* K. p* t - let w = getW(str, font0);
G) H; J2 v6 C - g.drawString(str, ww / 2 - w / 2, 200);
1 w4 T; i' e6 p% G: e8 [6 X - }
; V# g8 E& w/ C& o# }% ?, r - 2 _+ [; N" D- y# t, B$ t
- const mat = new Matrices();' [1 z0 \9 y' V. B3 _, {
- mat.translate(0, 0.5, 0);- ~ b. r, d( K: Z
( k$ [$ J. b# N- function create(ctx, state, entity) {7 @$ ~6 ?1 p7 e0 b5 |
- let info = {7 s9 `' k, C1 Y2 [
- ctx: ctx,# j: Q; t4 G6 T* K5 m& h4 W5 ]
- isTrain: false,
4 z: {; ~1 W; c. t4 _! I) T - matrices: [mat]," C x# n5 _- t1 M9 @( j6 g0 Y0 A+ L2 H
- texture: [400, 400],* w$ K. E7 v6 Y S2 ?
- model: {
+ X; u y# R; E3 u! ?+ d1 F - renderType: "light",
[2 l k6 m( ?1 Q$ b. A - size: [1, 1],' f$ n) [, ]( {; n
- uvSize: [1, 1]$ C: M: L6 P: x
- }
- P* `( {7 D- l" Y" B - }
* ^% W$ L/ t( n - let f = new Face(info);; G% h8 l+ x+ s. B; h
- state.f = f;. p, @. q8 ~8 h! a
2 N! x/ m) `. f* `- let t = f.texture; v7 E, j ?) G
- let g = t.graphics;
" f5 Y0 f& a- K; V9 w) M+ E/ M - state.running = true;" I2 @$ R& @2 s- J1 {; p
- let fps = 24;, d9 W0 ]( A: |. S* I1 E- j- o0 @
- da(g);//绘制底图- M# F2 C" _$ ?5 _4 K
- t.upload();
+ J7 X* D& F: ~" `1 i$ C \ - let k = 0;1 t, R4 L7 l% L
- let ti = Date.now();+ T7 v+ q9 f& p& K, N
- let rt = 0;( S# Y% Y2 E7 X
- smooth = (k, v) => {// 平滑变化
$ q. L2 y: i# y/ t - if (v > k) return k;
# w. O/ F. l' E( ^- a5 H - if (k < 0) return 0;1 S6 a$ H) o* I5 Q! v0 }# s# ~8 {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 s: G1 B/ P2 x" C2 }' E) y4 o - }
, B- Q E) n. s - run = () => {// 新线程+ f0 q2 D1 E3 }1 S
- let id = Thread.currentThread().getId();4 G8 O, x4 j4 t# W. o
- print("Thread start:" + id);) e4 \: Z/ K4 i) s a- W$ B" u0 K$ H
- while (state.running) {* n* K3 M3 H! C h7 S$ {
- try {
7 ?% b* P* S" j/ }5 R9 r - k += (Date.now() - ti) / 1000 * 0.2;
- e4 ~8 r3 {1 Q4 z% \5 W$ O0 z _& S+ F - ti = Date.now();2 @! s# o! | U
- if (k > 1.5) {
( C" z7 u8 I5 b( N - k = 0;0 X+ d! f% |* F4 l7 w, ?8 r
- }
N7 y2 z# R# h* b) \+ u( Q - setComp(g, 1);
" X: G/ j1 [! r; w( J t - da(g);
% h) F a% X' `; c# k - let kk = smooth(1, k);//平滑切换透明度% ]6 Y- L y6 {/ H! o
- setComp(g, kk);
+ X( _/ q; I' I3 D8 }1 } - db(g);# N- O! z' w4 o# Q4 A9 ~
- t.upload();
& \# b; P% q7 S1 S& Z% f9 y - ctx.setDebugInfo("rt" ,Date.now() - ti);9 ^) S ]& a/ `
- ctx.setDebugInfo("k", k);8 x, e# I. Q3 f* X' {9 n3 a
- ctx.setDebugInfo("sm", kk);
) q) O4 r6 \+ S( `( x$ a - rt = Date.now() - ti;6 `6 G1 v. {$ V( `* k
- Thread.sleep(ck(rt - 1000 / fps));
0 c# J9 a6 L l+ l6 d( y - ctx.setDebugInfo("error", 0)0 N7 _! O5 f% K1 P
- } catch (e) {1 d: v% ?2 x6 Q$ y$ Z
- ctx.setDebugInfo("error", e);
1 N8 E" k. c8 O3 @; y - }
: |) g' P7 S7 ~) m9 [! z - }
. o0 Z7 P- `/ g' z' H8 I8 p" g - print("Thread end:" + id);
) v9 C3 [4 m/ W7 ~; `* f9 j - }, V* v# Q& _% s
- let th = new Thread(run, "qiehuan");
( u/ V( q- y' h, T7 N/ f% o - th.start();1 Y5 E* m1 a( \! v, P6 c
- }
4 u& C# c7 p u3 z: U" }1 F
5 F5 f2 ~0 h8 K/ O3 l6 b( O- function render(ctx, state, entity) {7 _3 R0 L+ N) c
- state.f.tick();% X. l! L$ d i& N5 n5 A2 x& E# l( t
- }
6 y2 _ w+ o2 v, h- p
s, o5 e1 v- W# A0 ` L3 L4 a8 F6 x1 @- function dispose(ctx, state, entity) {
* g. C) A) i9 B" ^3 s - print("Dispose");
! b# C9 \! A$ i" C7 b - state.running = false;. }' @" p9 Z6 _* H8 G
- state.f.close();
2 L' ~4 i8 j$ v- S9 f - }
" Y" {! a4 j! L" l - ; J' L0 ^% \& D5 g0 f
- function setComp(g, value) {0 a: a. o2 P; @5 _! k4 p1 n7 V
- g.setComposite(AlphaComposite.SrcOver.derive(value));
$ P0 z0 T. Y1 D( F) i) P7 U - }
复制代码 , u/ ~ @( n, I( v8 M8 y
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。% k6 ?! p" F0 R- Q/ H4 X( u
6 a% I' r, I" r# K l; j# e6 ~( [+ J. Q7 Y% k6 p) i2 z. I# i
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), m/ Q$ d( F% P h2 F
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