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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。8 o9 D7 t+ c$ m& I/ o
- importPackage (java.lang);
! i* }& x/ y8 Z - importPackage (java.awt);9 T& A% j4 I. g4 d- C' [% D% V
- 3 j8 z+ ]; ^, I, t" T" K
- include(Resources.id("mtrsteamloco:library/code/face.js"));& I1 O, Q$ h- ? h6 D, l
- 5 s2 L. L# c+ V7 f3 _( D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. i3 c7 M( Z3 |+ H/ D& c* e
- 9 E$ Z) h3 w1 J! R
- function getW(str, font) {( O! ~+ R5 s( C+ R5 ?+ U) I5 J
- let frc = Resources.getFontRenderContext();
, q" H% {* E6 T - bounds = font.getStringBounds(str, frc);
) o$ h. J. ?) N& H9 z5 a - return Math.ceil(bounds.getWidth());
% a/ `- L4 E6 Z, G* C+ p - }
, O" d- c0 B1 g# b9 b
2 _- ^/ y! b- T9 u- da = (g) => {//底图绘制
8 b; d# e4 `9 E - g.setColor(Color.BLACK);4 F$ U& h' f% h# j" x1 a6 a
- g.fillRect(0, 0, 400, 400);
% Z- @- t" {9 Q p: r) k( j - }
5 [& a5 K2 _( m% L; I* _; G- _
. b2 c" m! D' [- db = (g) => {//上层绘制
/ \$ J5 [) f5 ]: `1 y - g.setColor(Color.WHITE);
' n. T+ r* w' c# p$ j - g.fillRect(0, 0, 400, 400);. j, l- ~6 @7 e9 U6 @
- g.setColor(Color.RED);! [, \6 l! G/ M/ ^+ |% _' H! D
- g.setFont(font0);/ v' B x! L4 t! J* x
- let str = "晴纱是男娘";
y( L3 ?5 b, _" x | - let ww = 400;& c0 L! `5 l9 H$ o6 A
- let w = getW(str, font0);# W9 K2 ~ S8 k( }8 L: {! `
- g.drawString(str, ww / 2 - w / 2, 200);4 c A; j) U6 P3 t. d a1 w
- }* r$ T; I. e+ e
/ E3 ~$ u1 c3 t( g: m2 x3 `6 ]0 K( t- const mat = new Matrices();
3 R& _" T" u1 [ - mat.translate(0, 0.5, 0);, k6 T: r; |/ H! D
- 0 X) j, o6 L6 D' Q- l# v, G" {
- function create(ctx, state, entity) {
T2 z* \) @& s5 c! d - let info = {
* |* D' d4 j$ Y. s1 k4 {8 y) N1 S - ctx: ctx,
# H7 k0 p) ~6 m+ C; }& |' E8 p8 I0 x - isTrain: false,* V7 Q% N: _* h$ {. W) \
- matrices: [mat],0 H/ I8 c. A, v! e0 x3 w
- texture: [400, 400],! }! o; e% c6 j" v1 @2 ]
- model: {9 R. W `% o7 B, O& B
- renderType: "light",1 Z; f+ V3 a3 S1 y
- size: [1, 1],1 I) \+ i8 d( W# q
- uvSize: [1, 1]
j6 r% h! M; M0 j0 @ - }* V2 d5 K& T/ `
- }
2 z3 ~- B( P; k$ V& `( [ - let f = new Face(info);
+ S8 E6 g A/ x+ @* f1 U7 E' O8 I - state.f = f;
0 j- q3 C+ o4 M8 }
9 e) e" _" y( e, X- let t = f.texture;
: ?' d% Q8 Y5 w1 p0 E$ [, Z - let g = t.graphics;
2 f4 B5 D# W8 A& e1 f - state.running = true;) u, W/ R) ?5 |
- let fps = 24;6 m# ` m8 x }$ M4 f: h
- da(g);//绘制底图& g8 z. {( M3 T- G: b
- t.upload();
) a7 O$ x* j- q% E( y - let k = 0;( H: Z7 U* ]! J; D, \1 C
- let ti = Date.now();
$ D: `1 n! _+ B' t5 W - let rt = 0;- E( u0 }1 X) l) r/ W+ L
- smooth = (k, v) => {// 平滑变化
4 m" b7 m9 L# n# A5 E) b - if (v > k) return k;
: y! M' |- i1 ^% @! i1 K - if (k < 0) return 0;
Z) W [ H- w8 |9 F* N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% |" g; Z) {4 r: m$ e8 m) Y
- }! i" k0 W( N: e1 I' P
- run = () => {// 新线程3 e+ K0 X1 r& D: q
- let id = Thread.currentThread().getId();( {6 r. _% m. y# {3 D6 x! X
- print("Thread start:" + id);
) v, b/ \$ u2 H, g! D* ] - while (state.running) {( m% Q' n& T% ~: Y
- try {
) O( K4 N0 `+ }2 [4 l4 F - k += (Date.now() - ti) / 1000 * 0.2;% l0 F5 }6 x' u% ~/ a6 A/ U
- ti = Date.now();
, j8 A& Z. k& l$ D3 u - if (k > 1.5) {
% N' K; Q( n+ ~0 L3 F. Q7 [! s5 | - k = 0;
6 g7 ?" ]8 N2 i$ O - }
! L0 ?/ w4 u1 W6 u; D+ I$ f2 v - setComp(g, 1);& @3 N$ a# n% V4 k& Y7 X
- da(g);+ v* o+ z A, Z/ f' M" H
- let kk = smooth(1, k);//平滑切换透明度
3 U: V3 `) R! g! K6 e5 N& a - setComp(g, kk);; @( s" y, \8 ? `3 [
- db(g);9 k" j* z- W- J, B, ~2 }
- t.upload();
# x G, G. {$ U7 k6 _' j - ctx.setDebugInfo("rt" ,Date.now() - ti);. a& }$ h( ^( u- O: c
- ctx.setDebugInfo("k", k);5 w. C; w6 {( V# ]( D! O9 w
- ctx.setDebugInfo("sm", kk);
9 J( X5 R1 e; i+ C+ M) X& u - rt = Date.now() - ti;$ M, a3 u" O) c
- Thread.sleep(ck(rt - 1000 / fps));
/ O+ r* S3 \) ]0 P f% l2 K - ctx.setDebugInfo("error", 0)
m7 z& ]; V( T+ l" j - } catch (e) {
% `5 D, ~% r0 i) \ - ctx.setDebugInfo("error", e);
. F% m( D4 F4 \0 X+ V - }- C7 H: y9 K! o3 o: M3 E# \3 E( G
- }- x, P+ `% Q0 f1 s; R, k7 U
- print("Thread end:" + id);
+ B! p: V$ }% M% r/ x( a - }3 a8 ?# F1 j' N0 A" V3 m
- let th = new Thread(run, "qiehuan");
v# r8 Y2 C, D. Q( S, q9 R9 k' h - th.start();# R0 J) K, Z5 d! _5 Q, E
- }$ f' r( `2 R" L4 Y' \6 W3 r! n
- 8 g, A2 A) _7 T% c8 X1 P9 Z
- function render(ctx, state, entity) {2 q' k0 J+ i6 }; x
- state.f.tick();
; k$ i* ^) h2 N+ s& F% ?9 I - }: a3 U, P6 L v f1 d
- j/ d5 \( _8 a% @' `
- function dispose(ctx, state, entity) {
" T ~$ u; K. h7 J: w! a - print("Dispose");; |+ D m8 {" z6 [* K
- state.running = false;
: h% @$ q7 |- g C! I. D$ T - state.f.close();
( p" W% p. r5 L - }
% j; d2 x& |/ p. y0 w# G - & g0 \( W0 C$ `( C* V B8 T7 [
- function setComp(g, value) {
I9 ]$ |: k" R6 |' a+ Z& `8 t - g.setComposite(AlphaComposite.SrcOver.derive(value));' c0 \2 o9 _( Q. }3 h
- }
复制代码 * S: q6 V% E) e+ u, S9 K: x+ q4 j$ ]
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。8 k3 I) ]. _0 d- p
# u7 N( L) V. v8 u* g# Q6 U T0 i3 r, [+ R8 x0 e
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* E2 Q; b( R. w
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