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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。! C0 a; y+ F4 L+ X$ F1 u
- importPackage (java.lang);6 Y7 M/ q' y/ H" M
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));0 b& n( e% b7 }& ]4 {* _
- ; z) v' E: x2 F1 D# c" T
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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) ?* G" v, O/ C' T0 l( @+ b9 C& u' @- function getW(str, font) {
% ^' D2 k& I1 i* y1 ? J - let frc = Resources.getFontRenderContext();
H% F. }+ k) }( m( ^. n - bounds = font.getStringBounds(str, frc);
! f0 n$ R* x, L- c3 Y" d - return Math.ceil(bounds.getWidth());( Q0 ~* Q5 y; n. `* J \/ E# M% k
- }
# v3 l: E5 C/ c0 a% y6 e
M9 a7 z$ x) u& C3 s' S- da = (g) => {//底图绘制* A- h$ R! f6 Z6 F, T% c
- g.setColor(Color.BLACK);' l' ^4 @4 z' I+ [% J+ c* q/ Z
- g.fillRect(0, 0, 400, 400);
* j9 T! }, Z$ ^' Z: } - }
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* a' {, \* q4 Q5 s" ^3 H9 P" a, e1 B- db = (g) => {//上层绘制3 d3 R1 n9 a: [! I5 g# {, n' [1 b1 P
- g.setColor(Color.WHITE);
* p2 A$ U6 x/ V% D ] - g.fillRect(0, 0, 400, 400);* G8 X. k) y' G$ i
- g.setColor(Color.RED);
3 `0 Q' n: C1 e8 f2 Z3 _ - g.setFont(font0);0 |$ P* {5 y4 y- H' R" P+ i9 A
- let str = "晴纱是男娘";7 J8 `2 I& w( F, u4 ~& R; K# J
- let ww = 400;
2 b& \. m& G3 z% v3 I% H9 y4 Y - let w = getW(str, font0);- [3 {/ N! v; d. w
- g.drawString(str, ww / 2 - w / 2, 200);2 Z! y `2 H" R7 I
- }) r: c3 U' s( n
# K, j2 V$ s& ~- const mat = new Matrices();/ j7 B3 f0 L( r5 ~% f$ t) f" B8 W
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
3 M: P' F& I* p6 t% e [& o* e - let info = {( A F! D% R) Q5 h7 r6 ]2 m
- ctx: ctx,' @( I/ M! E$ l u
- isTrain: false,
4 M8 A% v) j' }0 W - matrices: [mat],# q8 |& v K5 w6 W& U
- texture: [400, 400],( U" T4 e: a6 I# u, n. U& V
- model: {: r/ ^) B# b2 i
- renderType: "light",9 A. a( |: i: E4 _! p& O
- size: [1, 1],
- r( U) o! x+ U7 k/ @& S; ^ - uvSize: [1, 1]1 c) v% c( n1 |1 M* Z! k4 f
- }7 y6 t- m; d/ C Q) Y& j
- }
' a/ p: K2 }% W/ Y. X3 O, T - let f = new Face(info);$ s0 i0 ?2 {5 }- U) h* ?" x6 H6 {
- state.f = f;
3 V4 G3 l) g c# d - # G2 A# t+ u2 h6 h
- let t = f.texture;
- l+ a, S# q( B3 g; v7 [; Y - let g = t.graphics;" t0 G: L+ B* s( `$ F4 N& X1 Y
- state.running = true;
# N F& ?, `* q4 S - let fps = 24;
5 j3 |$ B& r9 U% y - da(g);//绘制底图/ n3 H( Y- g" e! E2 j/ J4 f6 L2 i
- t.upload(); P' X3 J. Q) g1 P
- let k = 0;
5 a B6 c( {; ^% @ - let ti = Date.now();
: s1 H( v l' H1 T* u. z* U1 T( w - let rt = 0;( k3 c* E. g4 Y8 D, ?
- smooth = (k, v) => {// 平滑变化5 M1 U9 v1 u" O; J
- if (v > k) return k;
9 E; Y4 W& ~: d+ m' g8 |4 [6 ` - if (k < 0) return 0;
& ?) s% c7 k3 d% R' R4 F - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ z8 x( y7 C6 z& B7 I! p1 s. X% r
- }
0 R5 R! I4 m0 w* [ - run = () => {// 新线程
( i. D1 X2 z# m& ?5 A! e% d$ q - let id = Thread.currentThread().getId();% u1 {8 C5 y/ \
- print("Thread start:" + id);6 T% K$ T% L4 I. P
- while (state.running) {
1 P# h8 D; E. ?; i' M- ~, D3 j - try {
0 s: {. Q5 n6 W - k += (Date.now() - ti) / 1000 * 0.2;& \+ V/ b6 ~5 g$ l3 g
- ti = Date.now();
t+ b; [% X/ L0 u5 ]8 h$ v - if (k > 1.5) {) g. q6 T7 i: s8 P
- k = 0;
2 q9 o& L* P( L1 I - }
. g, b$ T0 X4 _/ y7 v - setComp(g, 1);
3 t: @" `# I$ B7 Z e. o( I8 ? - da(g);
4 _7 W( c v5 D. ? - let kk = smooth(1, k);//平滑切换透明度
' A% T! s8 X# p8 W! t b! P( } - setComp(g, kk);
6 |; b" n/ }' b* d0 O% j- t - db(g);3 N# R: v) c- j7 d0 I
- t.upload();0 H: `" B3 R4 G
- ctx.setDebugInfo("rt" ,Date.now() - ti);
5 h, H, l8 C0 U6 l) W4 W - ctx.setDebugInfo("k", k);. Z& h2 \+ W1 Q6 r( b. S
- ctx.setDebugInfo("sm", kk);
/ S' {& O5 v' R2 C# T3 p2 F - rt = Date.now() - ti;3 Y" h: T+ K' j5 v
- Thread.sleep(ck(rt - 1000 / fps));4 W4 k( d3 F. i2 s6 }' u3 D8 l% m
- ctx.setDebugInfo("error", 0)
1 E+ p) A6 ?- \& z: q - } catch (e) {
+ P, T7 j1 d& N' Q; U7 Q* f# e - ctx.setDebugInfo("error", e);1 s6 ]! S/ c& J4 D
- }% E, Y. ]/ h l7 ?. Q
- }
! O) b- a7 k: a1 D& i, u2 z! r - print("Thread end:" + id);
& \+ f6 R* m1 j" t* i) _* f- Z - }
4 A7 S5 h% U) W - let th = new Thread(run, "qiehuan");8 L2 C2 ?/ T, \! P8 ?5 g2 T
- th.start();9 [5 B# c4 e {* e$ s5 D/ V# D
- }0 ?) p# n0 Z0 f+ ^
( J8 J2 g1 X) ]; T- function render(ctx, state, entity) {
( K. O! y5 G( T - state.f.tick();
; p0 d% U; R! ]% u0 R, c5 q - }
/ d- V9 Y# f1 i0 J/ \
- x) W s* v2 K( x1 v/ Z, v$ W- function dispose(ctx, state, entity) {. p- s6 c5 m3 G+ N
- print("Dispose");
1 ~6 }0 e% ~0 I0 H% o. c9 R8 w. q8 ? - state.running = false;
' k1 _0 u& F- M. i3 i - state.f.close();& @$ n( M! H* M8 D/ a
- }* ]! p- J5 f5 ^, b
- & ^" d' `! S: r0 K
- function setComp(g, value) {1 a; T1 |( ~( l
- g.setComposite(AlphaComposite.SrcOver.derive(value));- v. }9 t" T z4 n. a, v+ Q# A8 Q
- }
复制代码
( c8 W) e9 j2 [2 x! c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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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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