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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。
" L) |) ^& h/ m+ [- importPackage (java.lang);
6 B/ x) T* ?& D) F - importPackage (java.awt);
- `, q$ i9 `& R/ m0 F$ K - ! K0 L9 U' N. k6 d$ c4 u' V
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 g$ N3 Q2 O% h1 V9 L" s
- 3 }: G" v3 O4 x" y# V1 a- Q; G
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! x2 R1 i' @ F* }
- 6 h' I6 y5 a8 g1 C* e* R0 Q
- function getW(str, font) {
* B3 Y% j$ L* @: ^* p' Z - let frc = Resources.getFontRenderContext();
& z4 J3 |, E3 \ - bounds = font.getStringBounds(str, frc);
5 c7 G; x& [% _" Q1 i - return Math.ceil(bounds.getWidth());
% H, d& r' Z9 U1 Q, ^ - }
0 s( A+ ?2 y% a
* Y! K0 W& s2 b/ w/ I: _/ V- da = (g) => {//底图绘制
+ n3 P1 y% Z# ^0 w6 R; w2 X. e - g.setColor(Color.BLACK);
; f( Z ^# J1 D' R( T - g.fillRect(0, 0, 400, 400);
2 b$ L4 z9 n! M& N - }1 Z: |# D7 R: p3 ~
/ T) n! V+ [' Z1 j- db = (g) => {//上层绘制/ z! o# O# q Y. _) @1 U8 `: i
- g.setColor(Color.WHITE);
* B, O2 x5 B0 ~' @7 v6 N: e - g.fillRect(0, 0, 400, 400);3 u# l3 d1 N2 y7 I+ J
- g.setColor(Color.RED);4 _ z: Y! z& X9 N2 v! X, O6 u% @
- g.setFont(font0);3 j& l2 W- y% t/ n5 Y/ h+ N" l
- let str = "晴纱是男娘";
# C1 r7 J2 N* R M: k# w9 U0 r - let ww = 400;2 V4 C* W1 m0 f# H) X
- let w = getW(str, font0);
! g8 q6 p5 W( R - g.drawString(str, ww / 2 - w / 2, 200);
! B- p/ A3 A$ | - }, K5 }# `2 f# _ f
; A% E) [7 X9 N5 i3 C- const mat = new Matrices();
, I' t3 u& J2 e - mat.translate(0, 0.5, 0);
2 _- V q2 H1 Z2 [6 ?" R+ S8 i - ( N9 k- Y% ~2 W U
- function create(ctx, state, entity) { E: |" | o! U1 z0 U
- let info = {
5 A3 M2 @: U% G - ctx: ctx,7 ~ f8 i E1 U
- isTrain: false,; S4 L; m1 v6 n" v' ^) W
- matrices: [mat],
6 L1 n" U" }2 l7 i& Y: D5 ~: o+ E - texture: [400, 400],
9 |. P; |+ a2 S' n. V7 e - model: {7 l9 j4 F0 J) r, m# h' @" d0 T/ w
- renderType: "light",
5 v0 H# m5 d" j# g - size: [1, 1],# [6 h% S. J: `% M* n
- uvSize: [1, 1]) m% ]7 U6 U h& W- _+ \! _$ B
- }$ s" _% _( z$ D, g
- }4 V& r# _# K. O3 v4 I* P
- let f = new Face(info);
4 p ]5 r* [ y8 F" d - state.f = f;8 V9 L7 @& ]. w. o4 q [
- 2 R' \9 Z6 J( e
- let t = f.texture;: b! \, K* M7 g! A" }. ~, [
- let g = t.graphics;
+ j j0 U/ }8 } - state.running = true;$ E/ e' Z1 |* E: e* U3 q( q" z
- let fps = 24;
/ h- D$ X$ b2 Y6 y. Q - da(g);//绘制底图9 I6 f& |& H% p* T. ]
- t.upload();
6 W+ j" ?8 b. Y2 b/ u - let k = 0;
6 j7 A% Q: |" h% {- M& ^3 o$ n. N - let ti = Date.now();0 u! o1 O3 }; x1 r4 f: v: o( P+ f
- let rt = 0;0 ^% C4 J3 {$ x+ R
- smooth = (k, v) => {// 平滑变化: `( H# x' y+ D5 T j
- if (v > k) return k;
: Z; y4 d3 N( g% w; M3 @ - if (k < 0) return 0;4 R* L# g( |9 s
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 M, m, p) {4 ?
- }
5 |% S( N3 C8 X4 _) x' C: O5 ]9 A - run = () => {// 新线程1 N+ b& V, z0 |: M
- let id = Thread.currentThread().getId();+ n. S6 H# A2 Q1 M5 p* X) Y
- print("Thread start:" + id);
8 \# P* f0 z: X) k+ ]9 v8 v: z - while (state.running) {' p" p1 s- p; q y) e& c
- try {
4 ~% W6 M1 j9 i7 e6 m1 e- s" V @ - k += (Date.now() - ti) / 1000 * 0.2;& X2 @( g0 _5 r( q5 S' N6 u, [/ k9 ~
- ti = Date.now();
1 y8 G4 F5 ~! U- o) u8 r1 R - if (k > 1.5) {* u' T9 ?; p" e) P2 V
- k = 0;7 O5 S6 J/ y3 |% b0 u
- }
" D( O4 {; N3 \* A& C - setComp(g, 1); d6 K/ l2 p c Q
- da(g);
% B1 k/ [- o5 i2 Y - let kk = smooth(1, k);//平滑切换透明度- G& C- [- e' n0 ]* `
- setComp(g, kk);/ X0 \: a2 @# i
- db(g);- t8 l( [( w7 C# y
- t.upload();
L2 s$ u. ~. q3 Z: A - ctx.setDebugInfo("rt" ,Date.now() - ti);
# v2 K+ d# o, e5 H4 S - ctx.setDebugInfo("k", k);
, [5 A# \. U/ g7 n( G9 ] - ctx.setDebugInfo("sm", kk);8 n4 C7 Q% e. B% D+ O: f6 @9 I
- rt = Date.now() - ti;0 @6 I3 e4 r+ h
- Thread.sleep(ck(rt - 1000 / fps));
, s6 H# ~/ g8 V8 B' X1 o - ctx.setDebugInfo("error", 0)5 b. c' C# ~7 v I8 \
- } catch (e) {
m( l6 ?7 h2 Y1 L7 P% c3 K1 Y - ctx.setDebugInfo("error", e);
4 m% R8 k- [9 m - }
- P8 G3 d3 s% R, z - }
4 w& C$ @+ h% d/ [) O4 Y! G - print("Thread end:" + id);1 o# z0 n3 \, _' j9 v
- }
2 O2 v2 W3 d/ J( s9 S4 H - let th = new Thread(run, "qiehuan");* K0 K9 h, E# Q- ^
- th.start();
; ^. k. \. |3 A+ ?/ ~/ E0 \" @7 K - }
4 R+ t8 k5 Q8 _9 N& X0 T5 z Q+ P) T
$ \. C0 N4 p: p" x9 d: J- function render(ctx, state, entity) {( x( X3 [6 E/ o3 c8 L6 b
- state.f.tick();" u+ i: ~* A9 v/ L3 {7 @$ z3 V
- }
& \& l, ?, J* q' M* u% c K4 L$ ]
! ?; W2 |& v$ d+ J4 o& q+ l- function dispose(ctx, state, entity) {
! X% n9 }) ~6 ]. E: i - print("Dispose");
) J' r, N+ M8 } - state.running = false;' a1 g$ V1 R% w- ?) K$ K5 ~
- state.f.close();
% N" y G2 q5 t' h# d& n6 H1 I - }% A0 r) a S5 |" n$ ]$ z
* y- S N0 j6 Q+ r8 _7 B# _- function setComp(g, value) {/ m( J) n o" ^; a
- g.setComposite(AlphaComposite.SrcOver.derive(value));; K+ }% N& S7 N x0 h, g: W& P8 l
- }
复制代码 ; r: A: T+ H7 j3 G3 I
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。3 r$ y" W3 h, ^7 d3 Q. K! S
7 Y; R. D+ W( [/ o( x0 B
4 U; Z8 X. t ]/ N: k. v( f顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)- r# N& P9 z; @
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