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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。
$ Z1 o/ {; E* e m- importPackage (java.lang);
0 A# [0 O, R) m, o* f7 k' d - importPackage (java.awt);
; @2 R8 a7 S. ~! p
* m, y' P" G8 u! B7 P- include(Resources.id("mtrsteamloco:library/code/face.js"));
% n& {1 D+ \. T# g
5 E D8 a1 D1 K- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ _8 O8 l& \1 C0 C/ ?
: e4 t7 N; G- e3 g5 ]( V- function getW(str, font) {1 s! N% U- n# ^( j& X
- let frc = Resources.getFontRenderContext();
) e. y) N' |8 S, @' P - bounds = font.getStringBounds(str, frc);0 u1 G# w+ \1 @4 B
- return Math.ceil(bounds.getWidth());
0 k5 Y c1 A" k U8 E$ ]9 c3 [ - }
- n+ ~2 I& }0 U
# N" Z$ e' d0 V% x# o& h4 Q2 J2 x- da = (g) => {//底图绘制" S1 H- \8 }4 S2 z% c- j% D
- g.setColor(Color.BLACK);% L6 F2 N; E9 _
- g.fillRect(0, 0, 400, 400);# V7 m7 S2 n7 Y$ y1 z
- }$ ~/ Q4 N0 J# b& ]7 c
3 s% K+ U6 M0 V/ A/ n- db = (g) => {//上层绘制
# k) a. @! ^8 O8 l' y - g.setColor(Color.WHITE);
& q) N. ]$ u( ]& a& _ - g.fillRect(0, 0, 400, 400);6 y2 p1 [9 c2 y' b3 h/ T
- g.setColor(Color.RED);% s P3 \& V% x, M
- g.setFont(font0);
$ a& h# F# Y3 U+ M - let str = "晴纱是男娘";0 N8 ], a/ E! R4 N" o# I
- let ww = 400;- G6 ?. L% B. ]0 J9 I4 l
- let w = getW(str, font0);: D* u3 y) I8 s3 z: b
- g.drawString(str, ww / 2 - w / 2, 200);0 C" r- r4 m6 i% J& @
- }
3 V/ L9 v+ [1 y
: X3 P% P5 }0 ^, m- const mat = new Matrices();
- U) ~. V2 S) M1 F+ l - mat.translate(0, 0.5, 0);
& P ~* g: p2 {2 E- \
2 `* `+ D7 g2 M R- function create(ctx, state, entity) {
& Q* `3 \) C3 f: G8 @: d - let info = { } @# g5 l# I! u* o
- ctx: ctx,
, V% U) m3 t4 o5 F0 G$ }( Q, q - isTrain: false,
$ b0 S2 T f3 d9 I# k0 v$ J' X& w - matrices: [mat],
# v" b0 }. {7 V - texture: [400, 400],
- k' q+ Z7 | m4 ~: n - model: {3 b9 i7 X. d7 U
- renderType: "light",1 O( X. k8 N0 x% e8 A2 ^5 Z, t7 p
- size: [1, 1],
/ i1 ~9 R" r4 q& s/ d* u# n - uvSize: [1, 1]
# O7 K8 j/ A, d3 r+ T9 O - }: h! U- Q4 T+ \, J
- }8 b: m) f. h- h: X9 Y0 B1 Q j: P
- let f = new Face(info);
, c; H3 d( P `# D, W - state.f = f;3 k: F) f1 L" n9 a& D% k
- A9 }+ Y# e( i! U' i: H z; u: D- k- let t = f.texture;4 k! a, y( R4 m- I
- let g = t.graphics;
2 z! h" F1 ]9 n6 p' ~ - state.running = true;: h/ V* W. D+ G; X7 u$ {1 T4 w2 f
- let fps = 24;
6 Q# e0 V- l; w3 x5 A: y1 D2 \ - da(g);//绘制底图
6 W, m! k6 f6 j( [. e( Z - t.upload();
) A Y* _+ r7 ?' g& J - let k = 0;
3 }6 y" ^/ w0 f" O% |* u - let ti = Date.now();3 i- B) ^3 P( h' Y. l
- let rt = 0;
4 y, P8 X- F: J; B - smooth = (k, v) => {// 平滑变化' O) G/ [4 ]$ V# Z' D
- if (v > k) return k;# f" T- d& C$ j! r; l
- if (k < 0) return 0;/ u1 b+ S( V3 ?0 @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 Z; ^6 z* ~' Q
- }
8 O/ K1 T- z% {5 {8 k; i - run = () => {// 新线程) o$ }: f' x$ l: \" F; X5 v4 e$ E7 V
- let id = Thread.currentThread().getId();$ U+ q& v1 H* p" z# _
- print("Thread start:" + id);
" {3 x7 V7 p. R/ h - while (state.running) {
6 D% A# K9 n2 |% r, h$ D" w& Q2 [ - try {
; Q# V# g, i8 t5 w7 f% ^ - k += (Date.now() - ti) / 1000 * 0.2;
$ m) k$ u Y: \" V1 X - ti = Date.now();8 ]8 P B, v9 Y3 K8 Y+ k
- if (k > 1.5) {
/ O3 ]5 ~( R: y- q( A5 _ - k = 0;
' o# g: Z" h2 M0 y v - }
& Z7 l) r, J7 N$ Q5 ^& i - setComp(g, 1);
1 x" Q3 Y9 k- [9 _+ u - da(g);
8 }/ I8 l& E6 e) U7 q; d - let kk = smooth(1, k);//平滑切换透明度
5 ?+ F; {6 i8 l" g7 Z) s3 m% v( l) [ - setComp(g, kk);
. g2 o" q* ^/ k J, w$ \) V8 k - db(g);: f" w" |7 Y$ X
- t.upload();% ]* r6 p0 I: r1 }# M
- ctx.setDebugInfo("rt" ,Date.now() - ti);7 P* W' b7 V: F _7 Q. l9 e3 f
- ctx.setDebugInfo("k", k);$ g% h9 r6 O8 i! f( S! o5 ^
- ctx.setDebugInfo("sm", kk);
* D5 C6 d7 q7 v6 i - rt = Date.now() - ti;
" {8 D2 K! ]* J8 L1 p! N - Thread.sleep(ck(rt - 1000 / fps));( ^+ X9 O, J4 a3 h7 t0 D
- ctx.setDebugInfo("error", 0)
+ ?( A5 J* a6 {. d; @. y' g! T* z- Q - } catch (e) {
$ o" F) ?' i) m/ I% d# H, U - ctx.setDebugInfo("error", e);
" u, e; a9 W! F3 A# m' |5 [ - }3 l( D$ y7 \: M. e# J) ]" Z
- }
4 |, ~7 J, ^# S) L0 j - print("Thread end:" + id);& `4 b/ u {0 p5 U9 Q" w* D
- }
& r2 `& N; t. H, M - let th = new Thread(run, "qiehuan");
( D" D. i5 @! {/ d8 u' j - th.start();; q/ X+ X! N0 v' B4 n- |' a
- }$ o# l/ N" B; C5 o
- * U7 h/ i' S( v7 b) N
- function render(ctx, state, entity) {4 h- i& A; b9 `3 ]; U" C! ]
- state.f.tick();
; _$ [3 [" h% Y - }9 d2 N0 `# W6 Q' o* N; w( r
: A; h: ?( r% `6 S# b% }- function dispose(ctx, state, entity) {
w& n" F9 G9 C$ } - print("Dispose");" P, d9 z+ e0 w! C
- state.running = false;5 t# d5 F$ b3 n, h
- state.f.close();0 U! L/ t p4 F
- }
9 A3 F' C$ R4 s0 _ - $ M# f' y0 ~, b k
- function setComp(g, value) {
. P! H2 D a3 [, `2 i2 Y - g.setComposite(AlphaComposite.SrcOver.derive(value));
2 Q! p) N0 s9 c$ i - }
复制代码
" u1 R" n+ ~( k, d. 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。( R6 M, Y7 H- ~( |" ?
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+ C% b3 j% g6 U, j' a+ \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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