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- l" u# {- O; Y/ T, s8 H! Z* l E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。$ V; a6 Z1 j7 I7 O
- importPackage (java.lang);/ ?* U7 p" L3 ]' g- b: O& j9 o
- importPackage (java.awt);. P4 M1 V, N5 z+ f5 y
. c& j! _) P D% t% Z( A) n0 p- include(Resources.id("mtrsteamloco:library/code/face.js"));0 A% x& B# S m& {
- 8 u0 e7 X8 {7 A$ U. q; @* c
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! d d2 P/ X k# L8 \6 O7 G
" p: O. I/ f S% h# s9 n% l- function getW(str, font) {
w* Z* ?" J- B - let frc = Resources.getFontRenderContext();
5 T8 _0 [5 S1 t% f - bounds = font.getStringBounds(str, frc);
, A+ N# _9 v3 u$ \0 G - return Math.ceil(bounds.getWidth());; c& ~& }. r$ B. @/ Y A
- }$ D$ H) d2 S) u; ^+ L3 S
! x9 Y& ?0 A( h+ J) @; j- da = (g) => {//底图绘制3 N+ H/ h* R( F k
- g.setColor(Color.BLACK);0 S. t) S/ @) G* {4 y
- g.fillRect(0, 0, 400, 400);' m8 B+ X2 y8 j
- }
! N4 Y; z- F; T. m3 @8 J5 F1 R - 9 `6 {* [. ~# U7 q
- db = (g) => {//上层绘制
) Y# h. b/ X4 S. b; O+ D/ _4 j6 g - g.setColor(Color.WHITE);/ b" @6 ]* k: l; J. a7 r8 A8 J
- g.fillRect(0, 0, 400, 400);
_0 r* S3 `# u" S8 U$ u T/ l - g.setColor(Color.RED);
1 a1 k4 M8 J6 J, g- a" I - g.setFont(font0);
2 ]# ~ C& t& Z4 D: f& N - let str = "晴纱是男娘";6 t1 ?, ]% \( x# _2 w9 G
- let ww = 400;
8 |/ c, S4 Q( L7 ` - let w = getW(str, font0);
H+ t9 }2 h0 Q& D6 w - g.drawString(str, ww / 2 - w / 2, 200);1 G1 K$ J; k6 }" C
- }
0 w/ ^) k7 ^/ c4 \
7 E' ^* a8 g4 s, N- const mat = new Matrices();# o& A2 b, p; c0 @3 b
- mat.translate(0, 0.5, 0);0 y. r7 `; r' M+ Q" V+ l
5 }' H& X$ e6 x- function create(ctx, state, entity) {
( V+ q$ s+ d& |( E4 x' Y - let info = {" P# c5 {5 [* h. F1 V9 ^
- ctx: ctx,
1 O. e8 T( U* A& n - isTrain: false,
/ N' G7 l0 V6 P1 h) W" \+ C& I - matrices: [mat],
5 c( i2 D& ~; R' ^7 X - texture: [400, 400],6 i c) s) a" ~3 g+ e, ~
- model: {
% D" g# O1 x) E) h - renderType: "light",7 i0 x. ^& W+ B
- size: [1, 1],% F U. I1 k2 P1 i6 A! T9 q
- uvSize: [1, 1] x% W' E0 N2 N( I4 F+ A
- }
# N/ _: P% G4 V& }2 R) Z* _6 A; r - }
b# j. L" I7 C0 S$ L9 ` - let f = new Face(info);
- [9 j0 w X* w f - state.f = f;4 O3 Q- D/ z/ E/ ~# d
- 5 ?: `2 [( S1 `% q1 v$ Y1 j( d/ W# ]
- let t = f.texture;1 T: b- k& l' D* N. o0 Z
- let g = t.graphics;: F0 v* s" {( D1 y% w
- state.running = true;, P# j1 \9 e' Z2 G8 n
- let fps = 24;2 c( B! S* b! Y
- da(g);//绘制底图
" K* m0 ^; s0 k [/ D- S9 q5 m - t.upload();* q# v& r' }4 l* M
- let k = 0;& h2 a2 {3 A3 _! W
- let ti = Date.now();. M1 Q+ H$ A& w* V
- let rt = 0;
* Q" a z5 }7 a+ h) y! r. E - smooth = (k, v) => {// 平滑变化
6 b# Q* K9 i; ~6 ^) [ - if (v > k) return k;
; I9 l. U# A3 Y2 p: f T+ R) | - if (k < 0) return 0;" G) f0 l) q' C$ S* ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' w+ @. G) C% w: a: m( s, _6 I - }7 k6 W0 w- U+ e
- run = () => {// 新线程
- d; H% p) R2 ~$ C5 w( Z) e - let id = Thread.currentThread().getId();
# C- s1 \+ r$ j$ L" W% R - print("Thread start:" + id);) X6 b3 H( f' Y8 v, {+ T% M) t
- while (state.running) {
2 @. A! k" @7 H' K4 p! I M* B - try {/ {3 a2 Z. K$ N- {- M9 h" P7 n2 P
- k += (Date.now() - ti) / 1000 * 0.2;- b* d ?+ P g o9 o. r8 P
- ti = Date.now();5 B; V% a6 o. O, F9 i
- if (k > 1.5) {3 t+ U6 \& T% M$ E
- k = 0;
* K* q+ v1 X4 w6 o2 z3 C4 z6 `2 V( C - }$ ~& D* w3 `! I" G) \! F' g! v
- setComp(g, 1);
4 {1 w4 n2 m4 Q, `6 R# Q6 U5 \ - da(g);
' t( i4 L. z* A/ k - let kk = smooth(1, k);//平滑切换透明度
6 P" ]* s) g( U7 n0 [9 n - setComp(g, kk);% J+ N( v, o0 r' N& S; t) W' ^& |
- db(g);
3 N1 }" K$ T. F% g. c+ D - t.upload();
; c8 q3 g" e/ H4 I - ctx.setDebugInfo("rt" ,Date.now() - ti);
% z" W& ^+ u+ G' J+ O - ctx.setDebugInfo("k", k);, P7 g; t* B9 f% |7 ?1 J* B
- ctx.setDebugInfo("sm", kk);
M5 A; O5 P' o, f. H; K' _ - rt = Date.now() - ti;
+ a# _& |) n! u) |5 B - Thread.sleep(ck(rt - 1000 / fps));
& B0 ]# B. u, y2 y6 V - ctx.setDebugInfo("error", 0)
6 `* y" a" }9 M+ _# A9 O0 S - } catch (e) {
2 K1 Q7 k5 H/ d- _( K8 Q4 K - ctx.setDebugInfo("error", e);
$ |5 O9 D. Y: a `) V% W - }8 M; w. v9 ^/ l! z+ J2 r
- }7 R' P8 G2 X$ I- `! F6 F& y& A. H- a* q
- print("Thread end:" + id);
$ A1 W# N4 ?2 v/ X' } - }
" [# A1 p# w# E e - let th = new Thread(run, "qiehuan");8 C8 O1 f T& j! _ A8 T6 }
- th.start();( F0 p/ H! o- c
- }* ^# A- o6 A6 t5 I
/ b3 s" n: N# d, W& f- function render(ctx, state, entity) {9 k8 G! I" z& v. t/ _
- state.f.tick(); J4 V: J3 c0 A# c& W) m4 Q4 r
- }3 E* |0 }+ @8 b/ _. N: q/ p5 E+ c
- # u, w) v& I9 K, x
- function dispose(ctx, state, entity) {& |3 Q9 i4 K* a5 `' Q+ t" s; x/ l
- print("Dispose");8 ?# d- @/ u5 L1 \2 E
- state.running = false;
0 Q Y8 n. F8 ^ - state.f.close();
5 t% u0 `9 b% S - }# M; `0 ~7 L# `& k- s/ T( m
- 4 I$ N6 k) }2 b, P
- function setComp(g, value) {. ^+ O1 T5 ^2 X
- g.setComposite(AlphaComposite.SrcOver.derive(value));
# j. ?2 {; j4 ~ - }
复制代码 % n% F& Z" P+ c6 J
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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' X! X/ X3 L: U, v, m; k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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