|
|
还没有账号?赶快去注册吧!
您需要 登录 才可以下载或查看,没有账号?立即注册
×
( c6 L/ Z! X# Z- W N8 i, O7 p
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。
0 X, H4 Z; U* ` d' ]- importPackage (java.lang);4 ^% z# a* q# Q7 ?$ S+ B$ j5 R
- importPackage (java.awt);
- x& j0 m2 |6 [' m! E - 1 j& }' L" l$ {- y
- include(Resources.id("mtrsteamloco:library/code/face.js"));2 ?6 K$ m% [) d/ I& S% v3 `
- ( F( Q3 L, O$ W) R V3 V$ ]3 m
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);4 Z' D. c: p6 `1 S: y
- E2 _7 h7 _: V0 q* ?& [6 Q
- function getW(str, font) {5 n7 N, v, _: V1 ^( a
- let frc = Resources.getFontRenderContext();
* H. i+ w* {% ^! d- r0 [ - bounds = font.getStringBounds(str, frc);
( r$ k3 O: E1 x% P% Q - return Math.ceil(bounds.getWidth());+ c8 ~2 l* O6 m5 n# g
- }
3 i% ]& @2 D4 T
* @' {) W; o, C7 v- ^" I0 A- da = (g) => {//底图绘制" K t) _4 s# k
- g.setColor(Color.BLACK);
- I/ i2 X9 I9 ]7 s3 W - g.fillRect(0, 0, 400, 400);# j6 Q5 p( ?3 s1 w7 G0 F' E; N- ^
- }
+ J0 @0 ~( Q1 S$ s4 g6 c - . A( Z5 z9 {$ m
- db = (g) => {//上层绘制
5 r% o8 m+ @' E - g.setColor(Color.WHITE);
) R: @: g( z8 b" R$ k7 d - g.fillRect(0, 0, 400, 400);
* j' _8 B+ v- i5 [$ i4 T- Q - g.setColor(Color.RED);6 S. F' ~% f2 M% z( F: b7 ]7 i
- g.setFont(font0);# z P+ ?; f! o$ k% T+ X
- let str = "晴纱是男娘";) Y3 E- N$ Z& K6 U+ t& _% U) p; @1 W
- let ww = 400;+ X) y0 _/ w1 y7 H7 K. @/ ~9 }6 ]7 O; e
- let w = getW(str, font0);
5 M1 v% I u* k - g.drawString(str, ww / 2 - w / 2, 200);5 `* N( P; g, `/ G9 d. |
- }8 A% ?4 P; w7 l" A# |+ {! f
4 }2 d ~# `: T- const mat = new Matrices();* w' C& j3 \& w4 Y# y6 m5 ?1 o/ ]
- mat.translate(0, 0.5, 0);
6 L# {- _6 |: b, ?+ U; o) c# d
7 v3 P8 A5 n9 V0 H3 e. F- function create(ctx, state, entity) {
; a! S* M) r9 _* A( b. A - let info = {
' o+ M% n6 d9 h( I- j0 C! c$ ?; v - ctx: ctx,
6 \# ?7 S0 d2 O. e; G, M* Z - isTrain: false,
/ j; Y( |! m9 b" t S. \, i - matrices: [mat],0 x& A: |6 ^' Q" l. T+ O
- texture: [400, 400],
# @# V% b- N$ V+ @ T" z" ` - model: {
, N: f8 j+ i6 \ - renderType: "light",6 M- G6 [; ~6 t9 a
- size: [1, 1],; `: Y+ V) A% H, a w
- uvSize: [1, 1], o: f% y( _% d0 j4 `) G
- }
6 z( V4 J- o5 u# K8 z/ \ - }+ E: ?0 d% P8 G: \$ q) ~
- let f = new Face(info);& u$ M- ^$ b! g# e5 x8 P/ ?' K
- state.f = f;0 p1 @9 N1 R" f3 L
3 m8 B; M" s8 w4 R ?' e- let t = f.texture;
* N) d2 O: N! X' U; _; ]1 \5 @ - let g = t.graphics;
& j$ t) D: S2 V6 M - state.running = true;
3 p+ k& }' Y) v8 U3 c$ k - let fps = 24;' b9 a6 l4 n# Z* w
- da(g);//绘制底图
) d" y$ G" ?( r' p) W6 Q' M( L - t.upload();* D6 Q( l* g9 M. Z- K& Q
- let k = 0;4 B* K7 }0 T% k4 o, ~: N Z
- let ti = Date.now();
* o+ Y6 L5 n$ X" a - let rt = 0;
8 ^2 _2 x N* R$ I& J- i - smooth = (k, v) => {// 平滑变化) F% C$ _- ?! d; ]( Y1 P8 e9 W
- if (v > k) return k;0 W0 g" b$ v( _" h
- if (k < 0) return 0;
, E, j: c7 @% T& B2 G: Y, R" [) T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 @2 n1 U U: X/ G( @4 g8 {: B
- }
7 I' A! A% @5 J! i5 a9 M - run = () => {// 新线程
/ ]2 O) \2 t: S/ l( N - let id = Thread.currentThread().getId();# `; r: w$ h+ C5 }% U1 J: g
- print("Thread start:" + id);
6 }& }: B" n1 b7 y* z( o - while (state.running) {
* C0 @8 o& a# M& k - try {( ?6 Z7 C4 y8 W2 w- I9 D' r1 G
- k += (Date.now() - ti) / 1000 * 0.2;
* ^- c: R% b. W7 ^ - ti = Date.now();
7 @4 T0 C; \, E9 S+ k9 ^ - if (k > 1.5) {
3 }6 B4 a' U- Q - k = 0;
2 g% t+ y$ [. z5 B# u - }& H3 a" P/ E5 y- E5 i* y7 _
- setComp(g, 1);0 l5 {1 y8 S5 j7 O i3 g' T
- da(g);
; l: Q" b7 r0 l - let kk = smooth(1, k);//平滑切换透明度
( j8 }% `! R+ s( A - setComp(g, kk);
* K/ R T% h' I. O - db(g);* q3 _ Y6 a a) T& X, o7 F8 @
- t.upload();
# y1 E7 W, P3 L& b) Q - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 R2 _! e' @0 Y1 o# R( { - ctx.setDebugInfo("k", k);
t" Y- n8 I |2 W - ctx.setDebugInfo("sm", kk);
6 l* R4 i* G# |" i# g- z - rt = Date.now() - ti;; y* s1 R9 L/ B. v! u
- Thread.sleep(ck(rt - 1000 / fps));
$ z6 q5 C' q4 {. d( o. a& w; G* Z - ctx.setDebugInfo("error", 0)
/ y8 o7 T% ?2 y - } catch (e) {; j( f# P2 F/ h% K
- ctx.setDebugInfo("error", e);) X4 w* B9 T" W. R
- }
. v. }! S" ^5 H8 c7 p - }4 ?% e; K, x; p2 c# R
- print("Thread end:" + id);6 i- m" |7 ]1 Q5 g: }' o
- }
" y7 R% x) k% A l - let th = new Thread(run, "qiehuan");
: c1 `4 U5 L$ n% Z - th.start();$ p% [: M0 O! k2 O$ _# I
- }: q, N A2 r7 \, w
9 @9 \$ T% [* [( n0 P0 p1 S- function render(ctx, state, entity) {) f9 T C8 h- z" B9 ]) o: X: F: j' p* s
- state.f.tick();
! T: Y$ G( D" V7 @% x - }; m4 `# q' S& g' _
- 6 M _( c3 [( m# X3 `2 u
- function dispose(ctx, state, entity) {
) `# M" w9 d/ O/ ]) B' l$ i - print("Dispose");
" O8 D5 y# e1 O2 x - state.running = false;9 o' L6 Y4 i( y+ M2 g
- state.f.close();
1 L; I7 `. O5 A: f. j3 t1 d - }
. _1 W+ U$ F* P/ v# g) H6 n
8 U; f% {& N) C4 U9 c$ |3 E- function setComp(g, value) {
1 I. |: v, a3 g0 T - g.setComposite(AlphaComposite.SrcOver.derive(value));
. d" s! n1 d8 V8 M& A! A - }
复制代码
$ ^8 A& d' o9 Q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。
$ F4 z( ]8 U2 p1 U3 n! t; r2 o& J U/ K
7 O. }+ |6 F4 N' J
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
/ L# A) z: |( q2 G# U m |
|