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/ h; i; ~6 f' Q4 d; U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。5 ?6 S# q9 V: g7 U
- importPackage (java.lang);- O. k& d& b1 H9 x! T
- importPackage (java.awt);
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: `6 [' J3 `/ m7 w: V- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! r. U5 T( n- Z2 m y- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* ?5 k+ W5 o0 U/ ?6 X" ?$ H; v C
- F$ D& `* z# J6 K% W* ^7 a
- function getW(str, font) {6 u6 ]/ l* ? N( D
- let frc = Resources.getFontRenderContext();
9 j- \2 {: R ^8 ?/ p: I7 @2 C - bounds = font.getStringBounds(str, frc);
4 R$ B/ a7 Q% k5 ?8 Y$ A5 Z t - return Math.ceil(bounds.getWidth());, ^3 L4 {0 r1 c6 s. k* U
- }3 @4 L0 u+ O ?. J( l) R
9 X0 u T& i7 t# F" M" Z! h* S0 r% k- da = (g) => {//底图绘制
; ?& h% c& |0 E5 t9 Y! X' Y - g.setColor(Color.BLACK);
+ k/ d; \. U7 k1 @ - g.fillRect(0, 0, 400, 400);
! d' G% h$ b& `3 u4 c" s - }
7 @* [% @$ M5 f* a# G - 5 F* x8 j3 g3 {" {" R$ I; k
- db = (g) => {//上层绘制! H5 [3 O" r% Y: W, K' ]; a
- g.setColor(Color.WHITE);0 n6 T) P4 w' `. J" C7 x1 u# U
- g.fillRect(0, 0, 400, 400);# c. ?1 j. r. j9 K- e- |
- g.setColor(Color.RED);
) ~+ x$ s: ~: r9 H - g.setFont(font0);
0 s; L0 i: o+ }8 J/ w4 n$ A - let str = "晴纱是男娘";+ U/ h; d/ Z' J% \4 }
- let ww = 400;& h% n* R% x; }( v
- let w = getW(str, font0);
; N4 ?+ S" _% O6 x7 N& q - g.drawString(str, ww / 2 - w / 2, 200);! q8 V, j3 _5 @2 S
- }6 s1 |7 Q' V% F; R
- # b( C) n7 F( F9 H0 t
- const mat = new Matrices();. Y T, @: w4 N8 R$ `
- mat.translate(0, 0.5, 0);! U6 s& b7 D1 |
, M2 \5 X6 ?8 w" B3 f3 P- function create(ctx, state, entity) {
9 e9 c. ]- t, }5 s- g: Z - let info = {
( q; ^( v! O5 T% m& j - ctx: ctx,
" G8 ^, j: G3 v: N; Y4 J( O - isTrain: false,
3 d) \) B7 P8 y2 q* @$ b5 N - matrices: [mat],9 s1 g$ ^6 L1 G% K
- texture: [400, 400],6 D: p3 I$ q+ C0 X( v9 \: d
- model: {
' v: T9 {( a( U% ~0 Y# N7 H+ _( ~ - renderType: "light",, O3 Y k0 a u) M3 x
- size: [1, 1],6 n& E2 M9 w+ h/ `+ q0 ]5 a
- uvSize: [1, 1]
& e- f' o, F! T( h6 z - }
; j* w% z; }! t- B% j3 B% X$ c2 G - }
8 p$ t3 F ~) b0 _. | - let f = new Face(info);! a2 M: B$ p0 D2 g6 L1 m
- state.f = f;; K: k9 q% u& W6 X
- 3 n1 P& T( l* U, i, v% ]. R' u
- let t = f.texture;
! W2 e, {4 M" ~) Q. M - let g = t.graphics;6 V ]1 Q) U# |8 Z" A, d% Z
- state.running = true;
( u8 `, s, a0 s8 y - let fps = 24;
5 x; M3 Q- t& G4 d4 o( J - da(g);//绘制底图, l9 I3 a5 ?' J4 b9 p
- t.upload();) M" ?' k; ?* a: P" w
- let k = 0;
& O$ p# z/ Y" V/ t - let ti = Date.now();2 m3 \5 k! r) d3 D; p7 F- k
- let rt = 0;
+ a4 H6 {+ O6 b3 y# {' [ - smooth = (k, v) => {// 平滑变化! T; ?/ c, @! x0 X
- if (v > k) return k;
) U. D' t6 M1 ?/ r1 I' I - if (k < 0) return 0;* h2 V8 S; s# d& W5 [0 H. B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( t6 j1 _) y' @" ^
- }0 r$ p2 l. h. A" q( u# b
- run = () => {// 新线程( a6 n2 I/ u# \1 u/ W4 \
- let id = Thread.currentThread().getId();1 j9 p% T+ ~/ g8 y4 i
- print("Thread start:" + id);, D- g6 u2 m, ?6 P# N& Q; G
- while (state.running) {1 P- s- K- m3 b/ t
- try {1 N3 U, u, P# i& M+ K5 M
- k += (Date.now() - ti) / 1000 * 0.2;
- K3 j3 k, }9 ^+ p9 T7 |* s8 F - ti = Date.now();
& P0 F# j; G+ W5 P2 g6 y - if (k > 1.5) {
" K7 `8 N: W8 O( ?' f1 N - k = 0;# Q; n& x" d+ S% C: V, _) m: I
- }
5 F/ ^1 w8 c( V. s0 \* g9 S' d - setComp(g, 1);5 l) V. E- C( y2 b6 K
- da(g);
- M% D2 ]6 i; H5 K" u+ F - let kk = smooth(1, k);//平滑切换透明度
- N& Z# o% a+ n3 r - setComp(g, kk);
: K4 S5 t8 Y4 ^7 B$ X. l5 r - db(g);, Y' D: C. j( f
- t.upload();% e! S u( q) x& b5 m g
- ctx.setDebugInfo("rt" ,Date.now() - ti);$ `$ d6 Q$ S/ P; X
- ctx.setDebugInfo("k", k);3 S" |6 n# A1 |+ n
- ctx.setDebugInfo("sm", kk);" u0 x7 m) Y, [7 k9 I5 Q
- rt = Date.now() - ti;0 O! ^, |: u+ l
- Thread.sleep(ck(rt - 1000 / fps));
8 l7 S' K# ^) O k) T - ctx.setDebugInfo("error", 0)
7 n( W6 Z9 X5 S! N; O: J - } catch (e) {
% j, ?2 b+ ]+ v) C5 T - ctx.setDebugInfo("error", e);+ n2 N" y5 l3 S0 s3 A' n( Z
- }
) B1 y* F# ]0 X! G0 v9 D& E - }
. [* c+ c4 D# W0 ?. e' T( I - print("Thread end:" + id);
9 O% e6 z. y8 M3 P, ] - }
8 z3 P" c# Y7 f2 `& ` - let th = new Thread(run, "qiehuan");! |6 B7 i2 a, {: v- \ `
- th.start();
4 f- Y$ m0 F/ |$ q2 n: U0 f - }; }: ^: z- P6 b- R) P6 J
4 f% I. {8 u0 B# M- function render(ctx, state, entity) { W, Q9 x+ |- t
- state.f.tick();! j; \8 a: t) m! b* a6 a5 h) _# |
- }" D7 j$ u% h) c: G( Q
- 4 T [4 X* D5 U+ D- i3 A
- function dispose(ctx, state, entity) {
+ @+ e0 e9 m! ?: `5 ^ - print("Dispose");
( @# P# c0 g5 a+ ^ - state.running = false;
& l$ B# C) _7 n - state.f.close();$ |! `) m$ W8 x6 [$ G8 W& v
- }! y, d4 {' F0 t* w# N" `1 X
- 4 _' b: V( q% c! _5 u* u; q
- function setComp(g, value) {
- \7 v4 a. n# I0 P+ t/ ]- b - g.setComposite(AlphaComposite.SrcOver.derive(value));; ]" U0 U7 e Y3 k2 ^ b( P. a, q: ?$ T
- }
复制代码 1 N" y. K, j; s; K) y3 Z) A H
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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1 J* l& @5 V5 c; G2 b( `4 b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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