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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。4 I; J+ Q! ^" d3 f* k5 E. K
- importPackage (java.lang);
7 U' i0 S& ?$ z5 ? - importPackage (java.awt);
' B" k- L& o# j4 h - % h: a5 L) e/ U9 Z
- include(Resources.id("mtrsteamloco:library/code/face.js"));' ^* \* m) |+ x: k1 Z
- " K! v% D. H+ z9 W* H# _: j- `% b
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. G7 c' \, w* D
- 0 ~) _8 I/ F# E: X6 P, i- N
- function getW(str, font) {
9 S/ }4 G" s$ s0 [ - let frc = Resources.getFontRenderContext();
: W$ ~5 D# ^/ N' O1 l - bounds = font.getStringBounds(str, frc);' Q- C* Q' d+ j/ o# i
- return Math.ceil(bounds.getWidth());6 p4 |; A1 \2 o" u* H
- }" w6 U0 o# E* f. T# _
- * _' H1 P, p) n9 P* e; p
- da = (g) => {//底图绘制
$ @6 G% A1 E. a3 F. F2 {4 B - g.setColor(Color.BLACK);7 i) l) Y9 B. |: T$ w) L$ B/ T
- g.fillRect(0, 0, 400, 400);
/ M: q% Z$ G# z- V5 _5 Y - }
. B( F! ?. `$ T: j2 @: y* C0 N
; h! |% R& X8 z% `1 _0 y( \- db = (g) => {//上层绘制
* b0 m' O: Z) D4 U9 ^ - g.setColor(Color.WHITE);$ {, _ I$ a( ^: X
- g.fillRect(0, 0, 400, 400);8 A8 ^" r: @. i6 K
- g.setColor(Color.RED);& X! Z# r5 z1 V5 C2 e' {4 X
- g.setFont(font0);: q; @9 K' A4 C, v ^& [. D
- let str = "晴纱是男娘";
5 | E2 l3 E+ w - let ww = 400;7 c! j+ A5 u: ^* K" g: F+ V
- let w = getW(str, font0);
9 R& g& S7 C+ q - g.drawString(str, ww / 2 - w / 2, 200);3 d8 g1 W" m. j1 b. f
- }# E; ]/ ]! m ]! ]& R
0 S) y0 A* w2 q4 w4 P4 N- const mat = new Matrices();
- ~0 J; i3 ~3 w6 ` - mat.translate(0, 0.5, 0);
! u3 b/ w# ?/ d: \9 v/ z4 H. K
: j# ?$ O! ]+ }& T. R4 m+ }- function create(ctx, state, entity) {: R; d0 g+ H- x5 N: z
- let info = {& F6 F' ~! @. e f# U& }
- ctx: ctx,
, E0 d% l+ O9 g4 W - isTrain: false,! m7 @7 k- M+ C/ ?2 t( Y9 ]% h
- matrices: [mat],
0 V+ a" d( j9 S8 V3 @/ B - texture: [400, 400],
$ {$ R& p8 `2 u. j( `* a7 m4 W9 J - model: {& g& d5 O L( |* ?1 D [" L1 l- t: J+ j
- renderType: "light",
# `% ~/ {1 d7 a. [( d$ w$ N: X - size: [1, 1],
% f1 \5 b$ E! l9 j - uvSize: [1, 1]0 Q- z8 ~% p0 `3 G E
- }6 N4 M/ d3 P6 o, C4 y' _
- }1 C7 v, j9 r% ~
- let f = new Face(info);
4 u7 M0 u9 ] `. | - state.f = f;, U0 Y7 w, K( X& _# j E+ R7 Q, X* h
( O9 o+ a# r1 f- s J9 I0 a- let t = f.texture;
0 }' o! N* @8 ^$ e2 b! d% H - let g = t.graphics;
" ~5 h3 }, x/ H/ M - state.running = true;- W3 L; O5 h% G% b! U, U! l0 ]
- let fps = 24;
* m2 Y( f5 R1 c6 Y& E7 V - da(g);//绘制底图
# g q9 W, R. D$ \ [% q3 r. _ - t.upload();
, e1 `/ Y. S+ |. ^4 u9 j - let k = 0;" d. |5 _& q+ u( ?: ?' j' \
- let ti = Date.now();
; s( G8 J! m9 v' i/ k) d, G - let rt = 0;
1 \) D# e* K' C7 z( @( E - smooth = (k, v) => {// 平滑变化! h- ]% G- @, H+ @6 J
- if (v > k) return k;
y$ w2 O' n3 L2 U) m/ d- N5 J - if (k < 0) return 0;
" K7 F/ e" }* P+ b - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; C+ }: ^$ k! H5 V
- }
" q; B; G& F) I' `5 `( @ - run = () => {// 新线程: w9 x2 R8 G" A N
- let id = Thread.currentThread().getId();
; s5 N- r' x, g2 G. _8 K+ } - print("Thread start:" + id);
0 s7 ]! y3 e: p; \5 p) B, a& J* } - while (state.running) {
" y" F# q. ^- ~& t# \ - try {$ }" k4 }9 j9 l, N: l3 z
- k += (Date.now() - ti) / 1000 * 0.2;* }1 v& o% \: S7 C
- ti = Date.now();/ P/ Z P( @9 D; Q+ g
- if (k > 1.5) {
% M) m& J( n" g, Q - k = 0;
h' F& N4 I8 w2 _ - }1 S* S/ L* r( i1 J; m
- setComp(g, 1);
+ T; w% T7 ^8 r3 v/ a! M - da(g);
6 [1 H6 B! [* x) J - let kk = smooth(1, k);//平滑切换透明度' h, V( p6 C! B3 T# k: O
- setComp(g, kk);
R0 o& Y) w( I" Q+ K - db(g);
- v9 M" @2 ?3 ?) V: X9 T9 ~ - t.upload();
1 ]* M) l) G+ z! I - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 K: n5 v! r+ c8 O4 B - ctx.setDebugInfo("k", k);
; p& z: a7 K' L# x - ctx.setDebugInfo("sm", kk);) D3 M9 ~/ j8 n' ?+ q0 |5 L! q7 l
- rt = Date.now() - ti;
# X: V+ \0 _. U- e2 k( p - Thread.sleep(ck(rt - 1000 / fps));, x, ]% I# O% G# b( ^* z
- ctx.setDebugInfo("error", 0)
2 l0 V$ B% w& ^7 o3 x - } catch (e) {' ]. X) w- ]5 {& K$ W0 f
- ctx.setDebugInfo("error", e);+ [! R5 `5 H: L& o
- }
. Z/ `* J6 ~4 y" b' I0 P - }+ D! [' P8 F. S
- print("Thread end:" + id);) x9 K$ p/ I3 [0 g
- }8 c5 F! V9 J* {. p
- let th = new Thread(run, "qiehuan");& D) `( r( r j; i0 \* a5 u9 B
- th.start();7 {/ b* [, b" t
- }
- Y8 p3 v5 n. r6 s: K. X! B- u - ' c7 _' r; {( L4 n8 P
- function render(ctx, state, entity) {
6 ?% U9 _/ @! }) E4 l - state.f.tick();
! E* t8 o2 {' b - }
8 \0 ^4 a# F% E4 v- g3 t
w/ R& N! @% P0 b* _; [5 O- ~8 v- function dispose(ctx, state, entity) {5 E. S( h/ Z' `0 o
- print("Dispose");
( m5 W4 O, c2 G& b - state.running = false;
! m& |6 z( a5 W. ]1 u - state.f.close();; S: P2 L Q- u- B+ b
- }4 u9 x; A* ?2 L; [2 Z
- ) p1 ]+ i2 F ^; Y) ^7 R& U
- function setComp(g, value) {- X0 F3 J( ~# V5 L$ f ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));
7 v5 ? R4 f- |5 E- L - }
复制代码
) S6 A' w* ~6 m3 W7 w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。* F/ |9 H5 @8 F/ t
7 A: d* L1 b- B- M. L& i
" ?$ u+ j( p( a8 P5 y* }顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), S {- h4 C# f" s k
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