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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。
* \# t4 r* k5 a2 n' k1 c* }8 d- importPackage (java.lang);
' c |& _8 {- \; X1 \ - importPackage (java.awt);
$ S: {* w. j$ U- ?0 r7 g ] - " P. ^, Z3 {9 y9 t2 x" a3 E; w$ x" A
- include(Resources.id("mtrsteamloco:library/code/face.js"));
U: M7 I5 @6 Q! M# ` - 4 \3 _2 F6 Y& O0 k) T0 D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( S& f& ~3 c9 f! ~ {: a3 I* |/ Y
- 5 V/ z2 \ U6 D, {: g% O, P6 s
- function getW(str, font) {
4 G# y/ p# d4 x2 s4 z - let frc = Resources.getFontRenderContext();0 s7 |( `6 S2 _6 O
- bounds = font.getStringBounds(str, frc);/ A( X" o- h; Y3 ]* J; \# V5 I
- return Math.ceil(bounds.getWidth());
5 \8 M) C/ m1 h' i6 L - }
* w' g7 p+ [2 G5 v5 H
3 Z: O. V" s; m R" }7 a- da = (g) => {//底图绘制) @5 O. u3 W( |$ [
- g.setColor(Color.BLACK);
5 X6 u. t7 J/ P4 U& d' L - g.fillRect(0, 0, 400, 400);, h, a+ d# |7 J8 T% O
- }- h% j* c1 _2 Q
1 |9 i. `, d) N6 j* W- db = (g) => {//上层绘制& p2 G' n7 h) I) M6 S8 f8 \: U! t
- g.setColor(Color.WHITE);8 w9 E8 P# w, R0 i, Y( r+ u- b
- g.fillRect(0, 0, 400, 400);
: {4 ]5 K& P a0 D - g.setColor(Color.RED);
# Z" U) ], ~: A5 B2 ?. E - g.setFont(font0);
% h8 z; x! U- s, D l2 N - let str = "晴纱是男娘";
* Z& V3 {, _ f0 H6 s1 _6 O7 S- f - let ww = 400;
j$ z- C2 ~0 {7 {7 t - let w = getW(str, font0);4 p4 ~4 ^" q4 M
- g.drawString(str, ww / 2 - w / 2, 200);1 d8 ^4 f/ V* y- w! D7 _, v ~
- }
# L0 x' X, t0 {* c8 _ - " V7 Q9 l0 n( v( r' ~
- const mat = new Matrices();) b: `' S2 e# o$ V+ N
- mat.translate(0, 0.5, 0);
, B4 G: Z2 v' k* w) J7 J6 o
1 r2 S8 P& ] b% l- function create(ctx, state, entity) {
) i1 f) {- I+ [2 N - let info = { Z# F. |2 B: F8 v
- ctx: ctx,
7 u% N2 ?; N! H) |$ E8 X - isTrain: false,
+ A# h, R; O/ {- F - matrices: [mat],% ^1 h n" m% t" N$ u/ t" U2 k
- texture: [400, 400],1 M8 x6 A9 m8 l3 Z( S( E) |6 n# C
- model: {" _9 ]) Q3 X+ B2 G6 X$ L
- renderType: "light",
( N( J7 B0 w( ? ]0 K9 Q - size: [1, 1],9 R' _& o- k, d& r
- uvSize: [1, 1]
3 I3 c) V1 T( H6 \: c* Y - }
' Y% e2 g) V4 f2 A! x4 w0 {, K - }% x4 F& s, g" S. h4 u( B1 F
- let f = new Face(info);6 Z! i% E8 @6 \1 _5 L% W
- state.f = f;! C5 r: L! ]' m. |
& d( a5 v0 y# ~" i8 k- let t = f.texture;
. m6 e+ Q( d/ T, K - let g = t.graphics;
7 v6 o! x& T I - state.running = true;! K. U0 I+ q! H
- let fps = 24;1 X. j8 k- r) H+ Y) l! m: A1 w
- da(g);//绘制底图
. G4 N3 C6 X4 q - t.upload();$ g, S4 ^, N3 s, G$ i
- let k = 0;
- y V# z* t8 G( D; X1 { - let ti = Date.now();' f, s- m3 z& A6 U+ F
- let rt = 0;
' o( \) N5 G, U4 m/ v8 I - smooth = (k, v) => {// 平滑变化
8 E T- v# n- z' k6 E& i - if (v > k) return k;
# M' b2 \, \# @ W) Q0 m - if (k < 0) return 0;- V" O: t/ r5 f- p
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: X9 s$ G8 ^( R( k4 _+ K
- }' m& U @5 W8 `
- run = () => {// 新线程
1 Y8 M/ Y% D. ]. q- Z S - let id = Thread.currentThread().getId();, W0 c- T( T% p8 @
- print("Thread start:" + id);
! z! p+ a" b/ S" d. q' h, m, S m - while (state.running) {4 v; S; p! p( p5 S) z
- try {- I4 Y" x) b# k0 W/ f
- k += (Date.now() - ti) / 1000 * 0.2;6 N; ~4 u9 P1 @- M' K" m
- ti = Date.now();
& f3 S6 F- }# }) v) g v! g6 o - if (k > 1.5) {: H/ h3 ]+ q7 f: ~5 [+ _& \' }+ C
- k = 0;* a5 ~) K/ |+ N$ m" C8 Y
- }
! v4 E4 h& ~- e8 u# K - setComp(g, 1);
3 q5 ?, b t6 M: w, Z8 ~, ?0 d+ s5 P - da(g);
8 ]3 x+ Y) C9 A$ S! H0 A - let kk = smooth(1, k);//平滑切换透明度1 o, u. h7 W: G
- setComp(g, kk);
$ A" J- F" K' e; e: ?# K8 _ - db(g);
4 P- B/ Q; ^+ \ - t.upload();
6 `0 h9 l( R- \+ M# j - ctx.setDebugInfo("rt" ,Date.now() - ti);- S$ [' V3 n3 W( d+ _ u) ^7 M6 S$ y
- ctx.setDebugInfo("k", k);
) c7 m3 S' P0 L8 Q1 K2 l/ W - ctx.setDebugInfo("sm", kk);
. U$ X* R: W& w( k - rt = Date.now() - ti;
2 T. Z6 q3 {9 t2 z" L8 y - Thread.sleep(ck(rt - 1000 / fps));
. n& {: |" y5 n6 H - ctx.setDebugInfo("error", 0)
# D o$ R' r2 q; g7 k - } catch (e) {; m- m, N! h, j4 K: X
- ctx.setDebugInfo("error", e);# ~: J: ~. m$ O/ Z! H( h8 e
- }
. J6 p, {1 u8 B# G* M4 n - }
+ }+ m* V, V) `, `4 G - print("Thread end:" + id);4 x, q6 }7 j. A
- }/ h! H1 b2 H" V- Q
- let th = new Thread(run, "qiehuan");( }2 e6 K: W& b( V( s$ m* {
- th.start();1 _2 \% s. a% U
- }& r: ^ {/ C: e) ^
- 7 K% R$ A! ] l" ]8 ^% W
- function render(ctx, state, entity) {7 L$ `1 ]4 V! i( _& I7 z+ I8 [
- state.f.tick();
8 I! a' _: }3 t' D, H9 ?# { - }- T$ X3 o9 ~# j5 v" N
- # u1 b$ N' {% ~8 V1 \* g+ e
- function dispose(ctx, state, entity) {
2 e4 ~- o4 ~. H4 h& J9 X9 v - print("Dispose");" X: S( [7 B. f. I4 E
- state.running = false;. F6 x, i8 {" e" g; x V
- state.f.close();
, e- M/ j5 c9 f$ c6 u - }
8 ^5 s9 E' d7 m' z" D
4 Z# r+ G' j- E O. E) L7 ~8 i4 b- function setComp(g, value) {: B* v5 j# K I
- g.setComposite(AlphaComposite.SrcOver.derive(value));' o3 s4 @6 B1 i9 f$ ~3 N; k
- }
复制代码
& `3 q$ p& T7 V* f& G% P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。1 M5 i1 r9 ?& N0 x+ l8 r
5 J( ?4 V0 x; H# X4 x
) F* r3 U8 G/ s& @( Z顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下); W q) x$ l$ \2 C
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