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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 v' J8 I4 ]1 t- importPackage (java.lang);& f h: N! c$ q2 d' w& l2 F5 O e# n
- importPackage (java.awt);: A+ {6 P1 h0 K, q: k% }
7 `, W! o" S6 m" W& H- m2 B- include(Resources.id("mtrsteamloco:library/code/face.js")); G2 G2 \7 J8 X2 a/ m2 F2 Y$ B
5 j7 j6 L- R' i F9 R( |1 [7 A- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
# E/ F8 P1 _ P9 }2 D - - W/ _+ S o7 M' @* q/ f
- function getW(str, font) {4 N0 }6 k3 ]$ `3 V, l( d
- let frc = Resources.getFontRenderContext();# N+ ~7 h& a2 x# ?$ E( j
- bounds = font.getStringBounds(str, frc);
' J, G* n+ f1 h3 ~ - return Math.ceil(bounds.getWidth());# A) B) g# _2 D; N1 W6 R, {
- }7 x- G u3 e2 t9 y4 N$ i: a
& D" w$ d8 f0 u( g* N3 k, R; ?: F' S- da = (g) => {//底图绘制
6 \. Z" l) r6 ~3 u1 {6 S! W4 g - g.setColor(Color.BLACK);
+ ?/ |0 ^. P. g/ V+ g5 o& q- _1 y - g.fillRect(0, 0, 400, 400);
! [; G5 w5 ]# n$ w6 [; {: k - }
5 t/ S3 e& h6 _3 e - 1 X9 ~0 M: J2 ~0 e. `7 B$ ]9 O
- db = (g) => {//上层绘制
) F6 h% j, c% K L" d/ @ - g.setColor(Color.WHITE);3 e8 x2 p3 F# H. u
- g.fillRect(0, 0, 400, 400);
/ c* \: \$ ~8 l - g.setColor(Color.RED);8 C/ t2 {5 E" H& {
- g.setFont(font0);
8 I6 I; b. n9 R0 a4 d( P+ S - let str = "晴纱是男娘";- I; K* @6 j' {6 ]' t
- let ww = 400;
8 S% P& _5 C1 x$ S5 J/ \/ P - let w = getW(str, font0);2 O, b, Z$ \' {
- g.drawString(str, ww / 2 - w / 2, 200);' r1 g, F0 e& w- X
- }
& {. V2 i1 O' R" [5 k - 1 ]; |7 F0 L: g5 _- C* l
- const mat = new Matrices();
3 f* q$ r( v' A- e5 B8 N - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {4 g, U, i: @) f2 N- ?! u& @
- let info = {
p6 m9 e8 S7 Y( Z! e - ctx: ctx,
5 E8 S2 z2 S" x/ P$ w3 |. H6 o - isTrain: false,8 d. x1 }6 i% y" T% t
- matrices: [mat],
( G: {$ {5 J3 h7 J - texture: [400, 400],
5 q5 R- u1 ?' N' s: q - model: {% y0 |( A/ b# h; X
- renderType: "light",
4 R0 }+ ?" j8 D6 n2 p* b( L - size: [1, 1],6 z/ D0 X, z* |1 f& C
- uvSize: [1, 1]1 t* g) P4 s' m R" Q6 w
- }
2 n/ Z5 |9 Q1 P/ B - }
# L5 E0 l! b( T6 i4 b2 \ - let f = new Face(info);8 {0 d( I8 t9 `, d# n5 W0 p, X
- state.f = f;8 @9 @' W1 o5 U# {2 e
- 9 \5 x+ i6 C) V( Y/ @" j
- let t = f.texture;9 B$ M, O# @( ]* G9 q6 `) t
- let g = t.graphics;9 }9 o' T8 Y' g+ l# Z/ n
- state.running = true;
; ~+ T/ V! g2 i! l- w( m$ Q: } - let fps = 24;5 f8 `8 d4 |& u6 X9 k4 H7 W
- da(g);//绘制底图
4 s& y+ Y7 N% a$ P3 R+ v8 P - t.upload();- H5 R& M6 @( Z7 j8 e; z( T
- let k = 0;
$ |/ j @, F( B - let ti = Date.now();
& B1 a* A' P4 R) a. \- V - let rt = 0;+ ?8 A% ?2 f$ o- A
- smooth = (k, v) => {// 平滑变化
# ]% F" o$ G1 w8 y; s: P3 s: k* y9 p - if (v > k) return k;& r1 k7 m M8 \1 i/ E, w
- if (k < 0) return 0;& {% P4 S. `4 O: e B7 \: Z+ y! d
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;5 A1 V9 ]& e! D( A8 |2 U2 b# ^
- }- c0 {1 o9 `+ D2 y: i
- run = () => {// 新线程
' D3 T1 a( q& d5 J* m - let id = Thread.currentThread().getId();
( k) ~' K+ ?* r7 _: | - print("Thread start:" + id);
4 |% F4 k+ @+ ~+ W - while (state.running) {9 g; h) u; H7 P
- try {2 H X& R* O A: O8 c
- k += (Date.now() - ti) / 1000 * 0.2;' u# }3 p% ~9 w7 | `" q3 ~- x
- ti = Date.now();( [/ p: I( K$ a( b1 Z
- if (k > 1.5) {, \4 m2 T! E' \# S3 u
- k = 0;
7 i$ X/ x* Q& \3 ]- ^" i) d" K - }
. W7 E0 ]" F7 k. P" U2 D. O - setComp(g, 1);
: y' o1 }& ]6 ?2 Z0 f5 s% a - da(g);
/ }, i& j3 i# m6 ~! F; H- X8 g: ` - let kk = smooth(1, k);//平滑切换透明度 F* G* y% u3 G" O) E9 l
- setComp(g, kk);
, M- G9 K9 x G* d - db(g);* P2 Q4 s' b, y( x' y; s7 P
- t.upload();3 C+ u- e: K, W6 m! {( f( L
- ctx.setDebugInfo("rt" ,Date.now() - ti);( P* _+ M% \. n- d4 @) n
- ctx.setDebugInfo("k", k);: Y5 w( Z8 Z% A O+ m
- ctx.setDebugInfo("sm", kk);
. ^. O, F9 z. Z" v& g - rt = Date.now() - ti;
1 x; x+ S- R. r) v( h$ Z; W - Thread.sleep(ck(rt - 1000 / fps));
n9 x, ?/ R# a1 L8 U - ctx.setDebugInfo("error", 0)
' Q6 N z+ j7 g1 _5 Q7 G5 ` o: m - } catch (e) {( J& t4 Q! L; z$ U( B0 x6 }
- ctx.setDebugInfo("error", e);
" }1 B! @ |" B9 V$ A - }
5 a0 R) n) ]- @" E, X* d3 x - }0 J" k7 Z6 X' c+ k; ^% Z# }
- print("Thread end:" + id);7 z, l c u% H( N* K1 N. O$ ~
- }
1 D8 }" `4 c A - let th = new Thread(run, "qiehuan");
: {0 _6 H- B) G/ ?( r0 _ - th.start();
' M# x% ?4 ?' o4 O" @+ r - }& y7 T6 V8 p# q8 e; e; R% o
- ) A8 ?& z) s8 U1 W0 U
- function render(ctx, state, entity) {
7 ?+ j/ h% a3 B" d3 E4 [- y; O - state.f.tick();! d: w# r! @) h+ y
- }
7 z, t1 |8 I# g! V - ' W& M" Q% q0 z7 I) g1 U3 p7 _$ |
- function dispose(ctx, state, entity) {
' X" m4 d( Q7 r# P6 O- t - print("Dispose");& l. V- O; `2 k% F8 B( ~* v
- state.running = false;
% I, z" J+ y" C - state.f.close();1 l+ \# J, _/ G- c& W+ l; v/ ^5 t
- }
# J! }# `. }2 E. @ h - + V% T {& ?# |5 f+ ?: Y
- function setComp(g, value) {4 w6 a) t; U' d. ~, w
- g.setComposite(AlphaComposite.SrcOver.derive(value));
& w4 G9 {; @$ l8 G: h$ u; P - }
复制代码 / C4 Y( I# `, r/ M8 F8 ]9 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。+ v3 K2 g$ Z" o1 E
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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)- D; x" K6 R) `1 {8 X
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