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3 d4 t; r N* X1 i: K. L, o! T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。7 n* a3 Z* d0 P+ E: a0 f6 |8 T
- importPackage (java.lang);
6 t% [* P \* n+ J1 \: ]8 n- E7 {( L - importPackage (java.awt);. X8 q" y# N" Z/ G
; [5 T6 F0 b& E( h8 K: j8 |- include(Resources.id("mtrsteamloco:library/code/face.js"));
6 g+ N- a1 ~/ E% {- [7 ] - ( W) a7 V2 p! q2 T; i
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
r% N2 j; z& I. m& `: M
) l- ? V( w5 p& V6 K- function getW(str, font) {
( Q8 U l6 y" y Q& w - let frc = Resources.getFontRenderContext();
, J; E3 t( k1 Z+ I3 q8 C - bounds = font.getStringBounds(str, frc);5 H/ P6 |: q0 w+ G
- return Math.ceil(bounds.getWidth());2 h" d6 K3 Q9 K x% O/ L
- }# N" _# z( F( A6 E! Z: a3 ?
' E+ j0 U8 t! S- da = (g) => {//底图绘制
) v% i6 ]+ ]& g) Q4 M% z - g.setColor(Color.BLACK);
+ L# n! L9 k3 U; J ? - g.fillRect(0, 0, 400, 400);
% O9 o2 ^0 g* f) e3 r - }/ N( P% e# Y {( v. U% q
9 u0 y8 d5 D& @( m4 ^. o2 v- db = (g) => {//上层绘制
, V7 L$ Z2 _$ `" K - g.setColor(Color.WHITE); d9 d( s6 v4 V
- g.fillRect(0, 0, 400, 400);
x( Z! J- P8 N - g.setColor(Color.RED);
# F( ?. d( Q* ~1 y" u# A! W d+ ]& N - g.setFont(font0);
# ?8 h5 w& a i1 V - let str = "晴纱是男娘";
; j/ |4 N+ j M$ \ - let ww = 400;( w% k$ m+ R5 Q0 u4 [7 i$ p
- let w = getW(str, font0);
/ v5 u1 U" s. D5 R+ s( j - g.drawString(str, ww / 2 - w / 2, 200);, `: T, `1 f" i' K. d; R' Z
- }: n+ Z! a- w" Q, N$ ? S- A. \. ^
- ' A9 X L: f5 P& \
- const mat = new Matrices();
- v3 A( W# K1 v( ] - mat.translate(0, 0.5, 0);9 q8 ~/ m3 `9 n
- * O, `/ T0 @: H$ f1 o
- function create(ctx, state, entity) {
1 T+ I3 y& p1 {( @: G" t - let info = {. U @$ H( Y5 i: @" [9 M. U
- ctx: ctx,& ?: M3 `, ]4 n* W5 K( `
- isTrain: false,. ?( K' U1 o$ D1 e4 s0 v
- matrices: [mat],- M: P, s/ [. \9 C- G& ~
- texture: [400, 400],
8 V) n8 F/ i' p+ b - model: {! q o: s. o3 \- o! ~. l- P- n
- renderType: "light",- |' H2 Y) m9 W- u. {0 Q
- size: [1, 1],, K6 z( [0 T+ ]' i' S) N- G
- uvSize: [1, 1]
# A. X) t! e/ i8 x, L - }
& V6 \5 }& f+ g% d; v - }
8 E1 |; X( m- _+ e U. K9 ` - let f = new Face(info);
( r6 |4 q7 p1 ]6 w5 c - state.f = f;
/ f C- t. B( G* i F
' N9 J. s- W, ~7 J" L4 y9 G- let t = f.texture;# Y$ V- n2 Y9 | A7 k+ F' N# J7 s
- let g = t.graphics;
4 G! i1 y& r& n1 v6 a - state.running = true;2 Q1 \/ X5 K- ?& z2 m J
- let fps = 24;. x0 I/ m/ t( Y2 s
- da(g);//绘制底图
+ @& W6 W `8 l% `8 v& e - t.upload();; D6 F. ?' u+ X6 U: f
- let k = 0;
! C3 I+ E3 v, a ]$ Y - let ti = Date.now();0 o9 S n/ S) ~- O1 e4 ~+ N
- let rt = 0;* j3 i) B: C: D2 r$ B' y5 {, q
- smooth = (k, v) => {// 平滑变化
, c' P0 M) u5 S- S0 ]! W4 @8 S. I8 q - if (v > k) return k;
. t% _& L T# s - if (k < 0) return 0;7 Q* D) j1 T+ _( _0 x
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
$ W/ W$ U) d: }: ]7 l ~ - }. M+ X* j& k& u- D' {
- run = () => {// 新线程
/ ~0 l2 ^+ R$ c( n1 l, ^/ s - let id = Thread.currentThread().getId();# W5 O0 m5 B8 T5 F! G; H" w
- print("Thread start:" + id);
; ]* n. Y. \" v+ {% Z* J) U - while (state.running) {
* V2 r* D' B$ ^9 M3 v - try {
8 d* C8 k1 W) d3 P3 f x - k += (Date.now() - ti) / 1000 * 0.2;
7 V. j2 c V, ]% m G% y S - ti = Date.now();+ f b G3 G/ M& g \
- if (k > 1.5) {- u8 O5 P, t3 b
- k = 0;7 f8 m& T3 Q% h+ j3 b" q
- }
" A5 I7 }! r& W) ?3 Z$ C$ } - setComp(g, 1);9 W: [$ H: C/ E8 l" U: y. k4 T
- da(g);* T( l$ g7 O1 `3 U+ F6 [3 f9 |
- let kk = smooth(1, k);//平滑切换透明度
2 }" _7 Z7 ]) M3 f4 u) N7 N% \ - setComp(g, kk);# p5 _& j+ q& m: q
- db(g);
/ z" q) i ?. b+ b9 t8 Y9 d2 ?! W - t.upload();
' C3 {, `) y& }3 F7 S - ctx.setDebugInfo("rt" ,Date.now() - ti);9 r4 S4 m# c* R; j. D
- ctx.setDebugInfo("k", k);
4 g/ O# F8 Q: N% X! r - ctx.setDebugInfo("sm", kk);- ^: @1 O: J8 T$ ?! d0 p- N ?1 r% M
- rt = Date.now() - ti;
# H4 S$ j: S1 m1 `) G! Z - Thread.sleep(ck(rt - 1000 / fps));* D3 T4 J8 ?& d
- ctx.setDebugInfo("error", 0)9 n1 c) b# @; Q% h2 X9 m9 C
- } catch (e) {
' Z; R9 `9 v# W/ O8 t - ctx.setDebugInfo("error", e);
( X0 W/ Z6 P0 ^" J! t2 { - }
9 U+ x( y( e7 X - }7 M8 X* {- z8 i+ S
- print("Thread end:" + id);
7 d! a) Q: {4 F; y6 W* | - }4 X0 M% d$ H3 z
- let th = new Thread(run, "qiehuan");7 y! g) n/ I ~& S% v
- th.start();
3 b: Q7 [1 r) M5 i5 R& P2 I# z - }
- X' v. a! b7 d1 x Y
) z# N# n. W d0 `! c4 u- function render(ctx, state, entity) {
) U. I9 f; d4 W - state.f.tick();' G+ }, X( h- G8 R& a
- }
; Z4 d- _$ J8 }' c3 \% Y7 ~1 \ - & j+ V: O$ F7 m1 y# i9 G
- function dispose(ctx, state, entity) {$ i& }+ Y1 K8 W# ^5 u: ]% \
- print("Dispose");
, ]' [5 ?- n0 Q) n' B - state.running = false;1 ?9 Y/ i- V1 ] B5 d
- state.f.close();
3 u/ f4 q3 D' R - }, P# T& H1 m8 g, Q
+ B% C, U# f) o9 D; c9 S! K% g5 s- function setComp(g, value) {. Q C; [( l2 R+ ~& S
- g.setComposite(AlphaComposite.SrcOver.derive(value));
* F# g6 I, z( D# I% } - }
复制代码
5 z7 A! s" H, H/ X# M, M$ n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。2 l% \; ~+ z5 a! ^. Z
0 ~$ r, s5 Q& K9 `) z1 {8 P; f
' u2 k2 W% a e+ }' X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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