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1 E$ E1 j+ ?" b: h2 X& p5 A2 q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。% F- z! x% s$ d4 E: {8 Z6 u
- importPackage (java.lang); a5 G# C6 w3 L2 H5 H% b" i
- importPackage (java.awt);
. `4 W3 `9 M+ c - ' d- ]2 K3 L! ], o3 m* z
- include(Resources.id("mtrsteamloco:library/code/face.js"));- h( n7 b2 e* y! o. C- B# k
- 6 o' U6 {$ r2 S- G0 v
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 t: r% _1 I- p& O9 {" \/ s( l% w: v
- 6 e0 Y6 K" P- q" j
- function getW(str, font) {
0 Z( D8 n( \! W( A4 S" I' Q* M - let frc = Resources.getFontRenderContext();
! W, U4 \+ s- M* S7 i - bounds = font.getStringBounds(str, frc);$ j, r# X* }4 ^
- return Math.ceil(bounds.getWidth());. C! H1 M" x( u7 D" i
- }) W' V9 A! @. k5 K) F4 S1 k9 u
8 |7 m% R" g! x! T& Y- da = (g) => {//底图绘制
( d' e8 P1 j4 C( T1 z - g.setColor(Color.BLACK);
1 l/ M% [0 e4 ]( ]5 h1 I' ~: \6 a' R- u - g.fillRect(0, 0, 400, 400);7 ^+ Z: P) l, K$ v
- }
c9 ^! r: i1 Y# ]! p8 K
& t4 _* h8 B# g' Y7 {! y- db = (g) => {//上层绘制
, w9 Y! Q" X2 X5 T& ^) C - g.setColor(Color.WHITE);- d& T& S( h& O/ t0 M9 _: ?- n+ n
- g.fillRect(0, 0, 400, 400);
" \5 ^9 a* b1 k7 \/ H' k! f. q - g.setColor(Color.RED);
# v" M& |- W& U" Z6 S8 V& a. w - g.setFont(font0);: ]1 }1 l$ S. T
- let str = "晴纱是男娘";
" j8 w: \( X. u7 _" z# K4 ?, U - let ww = 400;- H* S6 M" `3 P) y- z
- let w = getW(str, font0);9 H4 X4 S- U; l
- g.drawString(str, ww / 2 - w / 2, 200);# {) Q0 N' ^( T j" H
- }
$ f: U8 x$ ?/ S$ A' E+ | q - 2 J) s* ~- y7 m6 e
- const mat = new Matrices();/ f# V8 ]6 X6 ^3 l! y% `4 G' Z* q4 I- ]
- mat.translate(0, 0.5, 0);
& n( n; y* M4 k+ c4 i$ ]
# H) X) M' [; x5 W+ ^5 m- function create(ctx, state, entity) {) a5 v/ C3 d. u& s! A" B
- let info = {8 W r$ z8 V! J6 v0 x9 q: N
- ctx: ctx,7 r& F7 u, Q3 |& G- |
- isTrain: false,! O# v% S8 |9 w* t: l, V
- matrices: [mat],0 w0 U6 P" N9 k$ V6 j& v( ^
- texture: [400, 400],
" \0 Y+ L1 O5 w$ p$ o0 w& H- k8 X - model: {! f0 K; X( m5 U: n4 p
- renderType: "light",$ X. X9 b' y$ I6 M* |; R
- size: [1, 1],2 {- O4 @1 w; S3 w2 B
- uvSize: [1, 1]' v4 h7 ~- u# {2 y
- }8 P2 n# ?. \* w
- }3 N$ d: U: n$ W. Z
- let f = new Face(info);
6 ]0 h9 w5 ~8 W" i - state.f = f;
# H8 I. ]) L0 X/ [2 b7 Q9 ?5 p
4 M6 _9 P( o0 o7 M- let t = f.texture;1 F7 P4 P' t9 j( Y' @
- let g = t.graphics;
E3 `+ o* H6 r+ A& R! j P. H - state.running = true;
3 W5 H+ i9 V/ A" [+ R9 x - let fps = 24;6 r5 i9 m* O. ?6 s: a
- da(g);//绘制底图# j4 j8 D2 Q9 ~- }0 G3 N
- t.upload();
5 B' q: A8 [" r - let k = 0;
) B2 S9 i( n# c' v0 x - let ti = Date.now();
' Y7 _( C/ v- M! L2 I - let rt = 0;
* I! X2 _. B/ D5 ]- x - smooth = (k, v) => {// 平滑变化
0 R' V. k6 C! U2 v9 m - if (v > k) return k;
7 v. Y2 N: A, X6 W9 j& ]7 z - if (k < 0) return 0;
2 q( ?0 C; p. m, n9 s - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 I. S8 [: S v
- }
" X: ^$ Y: ~2 M, C; o5 k: Q, j - run = () => {// 新线程
6 Z. B( l3 m s( ] - let id = Thread.currentThread().getId();
: g# i, V2 g& W6 M. T - print("Thread start:" + id);
5 ~7 R. L4 J2 s1 c/ U8 i - while (state.running) {; R& r, T9 V9 D4 E- S# A
- try {
! L4 u( _- \5 Q( ^7 Z' j% M8 B - k += (Date.now() - ti) / 1000 * 0.2;
7 \7 k; C! [1 x9 j/ A! j- F" W - ti = Date.now();6 I" s* B: O% J# i5 T
- if (k > 1.5) {7 `# a d5 C: I& P( `7 X, Y
- k = 0;
Y+ w. a" S9 |5 G3 V) n - }
5 S) k/ [0 L% @& @ a5 n - setComp(g, 1); Y" t6 N7 ?+ y6 Z* `
- da(g);- `2 Q! q* O! w' Z
- let kk = smooth(1, k);//平滑切换透明度' Y- [$ p; t. Y h
- setComp(g, kk);! v! ~0 }0 M# G
- db(g);
+ t2 }& O/ f4 E1 l6 ?% x8 U - t.upload();' P3 V# Q; K+ g( k8 y
- ctx.setDebugInfo("rt" ,Date.now() - ti);. K/ u c" ?2 X" A. S
- ctx.setDebugInfo("k", k);6 ?; K7 J6 {' z' I9 |! h
- ctx.setDebugInfo("sm", kk);! _- C8 p5 L0 M# \& n
- rt = Date.now() - ti;& m$ o# {5 f& g9 Q# ]
- Thread.sleep(ck(rt - 1000 / fps));
/ f1 D3 k, }3 \4 \- l; I' P6 y - ctx.setDebugInfo("error", 0)& O# ? S* ]) M! D; _
- } catch (e) {
1 R& f; \& X" \& [% c - ctx.setDebugInfo("error", e);# c% J! \# Q C; }/ u1 Z }
- }9 d- {1 y, ]" D3 f8 e* J3 K( }
- }& e- Y9 o! r( b6 m5 D
- print("Thread end:" + id);& g$ Y% y" j3 O) s
- }
9 H! L6 s. v7 p% p - let th = new Thread(run, "qiehuan");3 y9 [* K1 A& f f
- th.start();) r; O- o0 g+ k' w/ F) n8 @& r) [
- }
2 `0 I7 a* W6 o. X - 4 B( t' @. A6 d" c) J8 M# v+ [% k% E
- function render(ctx, state, entity) {2 y( P1 p6 ^. L+ Z( t0 L
- state.f.tick();
% x! J2 ?% _/ P) y - }# B9 b9 H0 z- S6 D+ e: c
# b4 d" [8 i, U% y- `- function dispose(ctx, state, entity) {
# B, J+ w! { C w - print("Dispose");8 f6 ^ f1 V- y, o% k
- state.running = false;* l2 c9 P8 w1 \( Y
- state.f.close();9 _! U- N# B: j
- }
* l3 F! @8 Y5 u3 B+ o3 m
$ f! c2 G: p _ [1 H- function setComp(g, value) {
+ d0 a' D' p( [& S - g.setComposite(AlphaComposite.SrcOver.derive(value));
% a' q& l$ `+ X - }
复制代码 y5 x, J: ]" b. Y
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。
% L" Q" _8 r3 j% q/ F0 f, ], T2 u( |( c- ?) i% [8 X/ [
. p1 k2 j+ _( [) P6 a+ t+ J顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)* Q8 a X0 p0 h( F; k
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