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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。" z5 f4 k1 Y5 J8 h' i s' F
- importPackage (java.lang);$ |; d# s6 b/ j) ]0 ]
- importPackage (java.awt);4 G* g! k0 B" F' n. m, q
- ' s* C: |0 Q0 O3 f
- include(Resources.id("mtrsteamloco:library/code/face.js"));
" D: _/ \* i/ t0 G* M8 C - + A S$ e5 R, }. B# b" ]
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); k& G; T& F+ w4 [7 m
, E K. B0 o8 P8 ^. l- function getW(str, font) {. {- r" w* Q Z& A# r$ N
- let frc = Resources.getFontRenderContext();9 h0 w. S8 {. [0 `% {
- bounds = font.getStringBounds(str, frc);
% g8 I7 |, R4 v' x - return Math.ceil(bounds.getWidth());$ k, J% J9 @% d, `
- }
( ]) k3 S) I8 v, z& Q% F" z2 j7 s
# J8 V/ P Y6 v1 v- da = (g) => {//底图绘制& A% Q4 L2 Q/ p @' z
- g.setColor(Color.BLACK);9 N6 L9 b, d3 y7 W( X! M
- g.fillRect(0, 0, 400, 400);
0 t$ a1 H# }$ B- E - }& R& @ ~0 ]6 H
- - S7 n- L% [9 c$ r3 @
- db = (g) => {//上层绘制) l l$ Q; o% {4 j+ y4 a: q
- g.setColor(Color.WHITE);1 m" Q0 Y7 T& m2 T- _1 x D
- g.fillRect(0, 0, 400, 400);1 R4 l( `' k- e( x/ n/ G& W
- g.setColor(Color.RED);! h' }8 @# d" T" t
- g.setFont(font0);
$ B. p* R1 N% w F. s - let str = "晴纱是男娘";
" `1 ~8 g7 J/ W& T - let ww = 400;# K- r( @& r) U
- let w = getW(str, font0);
9 x- {% W! [% C$ {* e/ s - g.drawString(str, ww / 2 - w / 2, 200);
4 ]& ?" v% i6 R f8 i$ [8 j: F# ]( J - }+ R0 Q9 M% F# c% Y6 G g4 d% Q
# o3 s* v+ e9 l& O: X- const mat = new Matrices();+ v* y. m0 c( @3 q+ G$ ~
- mat.translate(0, 0.5, 0);( n! f/ M- Z, @& G# @
- $ N% l5 w( R' F+ J
- function create(ctx, state, entity) {7 q/ t' q" k" C* H6 G
- let info = {
7 s! c0 s8 t/ v1 K2 ` - ctx: ctx,
; ]4 Q1 @ T/ `& M6 a% L - isTrain: false,
J. Y5 K' z, \0 d) | - matrices: [mat],9 R4 ]$ Y: \) V. H8 n- W/ m5 z
- texture: [400, 400],
! t3 s2 n; p# v* u1 [& M - model: {& H6 h8 n+ l8 s0 e2 |# L
- renderType: "light",
4 z$ g! _% G+ S; j8 ]/ ~+ T4 j; l - size: [1, 1]," F0 ]1 e* Q4 T3 |& @4 \; q. T
- uvSize: [1, 1]# e- H5 U! R6 C6 @0 c
- }
/ z1 S `4 q9 ~: {1 r' l) u4 @3 _ - }
4 w) q2 F" `6 x4 d - let f = new Face(info);
; B' n$ c( c3 b% ~( ] - state.f = f;
: k7 S* e& H4 d1 O7 N2 g' B+ R
! V2 U9 A8 C0 j' p' D* a% b; g) F- let t = f.texture;4 ?4 \& c& U; V6 X0 p1 i* Q2 p
- let g = t.graphics;
. @5 ]' v$ _( x; _' x/ O& `; y1 y/ b - state.running = true;
w0 {' ^3 ]2 r. b, U - let fps = 24;
1 ]; Y1 v; U% i8 N2 b) j- d - da(g);//绘制底图+ |) w+ M$ |* J9 Y! k8 S4 ^2 K
- t.upload();
& `1 Z2 Y/ l4 J& w% Y - let k = 0; x. o: } n- X
- let ti = Date.now();
0 J8 L# k$ E5 w& n: N9 b - let rt = 0;+ B6 o% L# @; M( R
- smooth = (k, v) => {// 平滑变化
/ V( r! z+ L. H9 N8 }5 P& I; }! e7 i - if (v > k) return k;7 e: |: R( \3 n; `: X Q$ v. H
- if (k < 0) return 0;
2 \6 ~6 R. f. F# ? - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: D# `, N9 g) G8 G - }
c' V) u0 n4 P4 P% n; W0 }) I - run = () => {// 新线程
, C- C' g- h! D7 f9 f - let id = Thread.currentThread().getId();" Y; S9 A) n8 g; a
- print("Thread start:" + id);
, @. O$ {/ r0 M4 j. Q2 Q0 c, { - while (state.running) {8 @2 C! {/ L3 D* |
- try {+ O9 A. w) C% X# O7 e8 K. D B
- k += (Date.now() - ti) / 1000 * 0.2;$ Z# v6 }* a$ |2 w$ L+ G% f( s
- ti = Date.now();
& e5 O/ s) U8 R0 h/ T - if (k > 1.5) {% Q9 b5 w5 ]# b
- k = 0;
4 s4 W9 l& h3 ]0 j l* h7 ^: a" h9 r - }
- S' Z8 l4 z1 L" Y1 }6 N - setComp(g, 1);
3 n9 z" T7 T: S t8 R- s+ Y - da(g);
$ T( P- r9 f& G8 |2 ]8 r - let kk = smooth(1, k);//平滑切换透明度* O0 R) Q8 J) k
- setComp(g, kk);0 @9 H+ [$ h+ @, G& X& P
- db(g);/ u1 ^! q/ j4 q$ `9 g1 N( f
- t.upload();
$ ?5 v9 i6 u3 F q6 | - ctx.setDebugInfo("rt" ,Date.now() - ti);$ X0 p1 |+ J9 @3 o, p% L
- ctx.setDebugInfo("k", k);2 U+ q' d* q) O2 e
- ctx.setDebugInfo("sm", kk); m5 u$ W( ]( Z5 i0 M7 j; p
- rt = Date.now() - ti;
' D5 u c% p( `; L - Thread.sleep(ck(rt - 1000 / fps));
) b0 @$ e. s4 o4 R |3 a2 H" p2 { - ctx.setDebugInfo("error", 0)! r0 q; M+ D1 g8 J. R
- } catch (e) {& t- @7 o2 {# T! Y
- ctx.setDebugInfo("error", e);
2 j' A# G/ T! W' j2 p - }
8 L3 d* i7 p8 N& y1 q; o$ e4 F - }
- V. x# a# L5 ^6 }. j9 N5 n - print("Thread end:" + id);$ y/ F& F& {( F1 y4 I6 z) I1 ?
- }) h0 Z9 A, A5 \& r- @- R
- let th = new Thread(run, "qiehuan");
/ V- s3 e% K0 E7 K" O6 ^( k; z - th.start();, O: D. q2 r" ~* {/ I F8 `3 L
- }
$ x! y7 V0 L. t- j, ?, c- U - $ X2 u, ]8 D S' o
- function render(ctx, state, entity) { f" t% K Z1 U) p
- state.f.tick();
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- / J# s; p' H0 y0 V' C# w5 W, ^4 _
- function dispose(ctx, state, entity) {
: q6 G% o! U' d( t$ w# y% ] - print("Dispose");% Z! z- J2 ^9 l2 i& ?+ p. i5 I, f8 V
- state.running = false;# s W" [" i: C5 v7 ?4 @0 f
- state.f.close();8 Y l( d6 m; _" i
- }
3 M. {+ q4 j: M- j) C* v/ c - " t/ U U7 u$ W/ m2 r$ ]- z
- function setComp(g, value) {' a X* X% W: j3 U
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. a) c" Y5 {& _8 D0 l5 B8 V - }
复制代码
" N! K2 _+ M1 a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。( `6 a9 y z1 U4 [: _
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* C6 X4 T8 P4 K! d) t, T
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