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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。7 m3 S& n5 Y) |0 z$ H7 _
- importPackage (java.lang);
8 v( Z' V& ?9 K - importPackage (java.awt);
, e g$ Q/ U0 @! v5 Y9 e1 ?. q& v+ X - ; _1 b- p, W% b7 J$ Y+ I( v. k F
- include(Resources.id("mtrsteamloco:library/code/face.js"));
1 u4 y/ E# j1 P& e) |7 }1 V - ; S9 m% f. g+ ~1 S& p
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 E" j8 q2 j5 ^
$ A- ~6 ], V; p% @- a4 a- function getW(str, font) {
+ I0 ?: p9 P: _) s - let frc = Resources.getFontRenderContext();
$ Q) g/ U( G# d* L( x/ M7 a$ G - bounds = font.getStringBounds(str, frc);8 [3 m( v& |, K! e5 |
- return Math.ceil(bounds.getWidth());7 w1 w, Q& g! p3 r; l
- }
' i t, N& m& z$ Z) s9 o - + K, B6 C* a' W: [. ?9 |" u
- da = (g) => {//底图绘制
L0 M" Q+ E2 f2 j9 B - g.setColor(Color.BLACK);) X* E# W w9 k
- g.fillRect(0, 0, 400, 400);( k0 u8 N- V& p8 P z
- }6 k( F0 C2 p8 n' v2 ]; S) _
- 0 P t8 p7 E$ ^' p8 v
- db = (g) => {//上层绘制
( N% _: N% C: }+ l4 e - g.setColor(Color.WHITE);
$ s' Y; k+ D* A* h; \: [* c - g.fillRect(0, 0, 400, 400);2 |1 H/ ~) a2 p
- g.setColor(Color.RED);
( t8 p+ S( i5 T* J7 x! j - g.setFont(font0);
% o6 e) L- N @2 h& d; b - let str = "晴纱是男娘";" C4 {8 [" p1 q# C3 S' `; N- O
- let ww = 400;
$ c# [9 r4 `" P3 k/ H - let w = getW(str, font0);
9 J' d1 V3 v3 A7 G, }. l - g.drawString(str, ww / 2 - w / 2, 200);
4 R, S. \& X. @5 M - }9 [/ D; V& _0 ?' v' Y) E7 W v3 Q
3 F; r/ w* b) M/ V. \- const mat = new Matrices();
: k9 x6 O8 d& ]6 l* ~ - mat.translate(0, 0.5, 0);' ]' R/ i% \- G5 t& }3 @
0 B Q: O; B6 F/ r" s- a- function create(ctx, state, entity) {
* B# \4 v# x6 ?+ R. y - let info = {
; d8 G3 a% G) T$ [8 h+ N/ S, b) f7 J - ctx: ctx,4 C9 L3 z+ m+ m* M' ]5 }
- isTrain: false,) v/ }# D* z: ]6 b, l% v. q
- matrices: [mat],# n+ t W# C9 q% X* j, F
- texture: [400, 400],4 x+ E4 S4 `% }) u/ S% K5 a" O
- model: {2 J% _" V* M; \' M+ A
- renderType: "light",
( [. C% `$ f2 D" _6 j, y& Y" v - size: [1, 1],
# z% |" g; K' `, z - uvSize: [1, 1]* L" l+ G* z" ~
- }" a; |6 s# M, k
- }, n+ A0 o+ y; s" M
- let f = new Face(info);6 Z4 |# B9 j$ H/ ]3 s. `( G- f
- state.f = f;' s9 I5 n6 W3 `+ C
/ L8 G" z" G8 Z& H% U( ?- let t = f.texture;
6 W' M8 ~! K2 u. B* k: x$ ?: O - let g = t.graphics;3 `- z, Z! `1 `7 U& u7 A7 o
- state.running = true;+ B g8 J# w% S0 y$ r. J
- let fps = 24;
/ P5 t' ~5 X/ m' b) D - da(g);//绘制底图
' p y. r0 S8 G- S- C - t.upload();
" \7 p6 q( Z: h& f6 x9 Y; P& j - let k = 0;
+ v% \: O. v/ ]/ Q! N - let ti = Date.now();# l0 ]% ?7 f/ B( g3 R: q! u: C
- let rt = 0;+ h4 _# J9 n6 o, c' c' d
- smooth = (k, v) => {// 平滑变化2 Y, s( x2 j1 G* i; M0 k
- if (v > k) return k;! v3 l: C" G. |, r7 o
- if (k < 0) return 0;1 Q* t9 c. P6 O6 A& J/ }7 W; g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( M& }" c! c3 q4 w1 S1 I4 B) I - }* O+ K* ]3 d+ @ s, N
- run = () => {// 新线程
% C# H9 s4 }, S7 i4 m - let id = Thread.currentThread().getId();
" d0 A8 ]* v$ @) P6 H# G - print("Thread start:" + id);
0 k. S# I% \3 E6 { - while (state.running) {
9 R: q T/ c8 K3 Q* F - try {/ a) r b7 F9 B: V7 A& |' u
- k += (Date.now() - ti) / 1000 * 0.2;& G1 ?$ _4 {# R! C7 v
- ti = Date.now();+ O o9 I3 }- w: Y$ x, m
- if (k > 1.5) {
6 I7 r- w/ c/ u0 e' h7 d - k = 0;3 t' x( Q' }$ g) o: P, f G. U5 y$ ~
- }" p4 Q8 M/ R' F; K; D
- setComp(g, 1);
3 [% y3 E6 A1 _# q; h3 o - da(g);
: L) d4 n) N2 X% A( y, m - let kk = smooth(1, k);//平滑切换透明度
/ M4 S" E4 G7 n& j2 F$ W - setComp(g, kk);' b$ r6 I) _0 O# U, U8 _' B
- db(g);
1 t( x+ z$ A. l* \1 W. l: D - t.upload();
% w! I1 T- D# ^/ i - ctx.setDebugInfo("rt" ,Date.now() - ti);
6 z' @/ F7 j. I% z: r/ [1 o# t* c0 N - ctx.setDebugInfo("k", k);1 O: H/ L# o( Z/ z
- ctx.setDebugInfo("sm", kk);: j( f) |7 G5 s# K+ y; ^
- rt = Date.now() - ti;. ` Z& `; J$ Q: b- E/ O
- Thread.sleep(ck(rt - 1000 / fps));
' @6 U- \; |1 w0 n" |0 f; S - ctx.setDebugInfo("error", 0)
3 L$ x; |7 t/ Q4 N4 S - } catch (e) {- D t3 G( S2 ~- y' w+ e
- ctx.setDebugInfo("error", e);+ X' f h4 k# X: }) r9 S" m
- }
8 }5 s2 E R' P, x8 ^& {! T - }
3 F/ S5 Q3 U g3 c' _ - print("Thread end:" + id);& M8 q, E0 F c4 K r; ^/ s
- }1 q; U- V" d4 j! G7 Y* n# F1 M
- let th = new Thread(run, "qiehuan");$ W8 ^& I( f7 x5 L: Y
- th.start();/ W' G4 ]0 _ S; y$ N8 Y' ?
- }
7 {) C/ j$ O1 v6 E1 Q S
3 ^: ~6 i( U3 _% k9 J- function render(ctx, state, entity) {3 ? Q+ q. R1 W/ l. Z8 }' @. \/ D
- state.f.tick();
5 |3 |: _) c; t: b( S5 d - }5 N6 i* @! y: e8 p
- 0 Y8 X4 v+ v& V- e+ H
- function dispose(ctx, state, entity) {
- \( O/ H5 ~% [ - print("Dispose");
. z. i$ L: }- h) ]2 ?7 g - state.running = false;
( K: v; ]2 J _% _4 a% P - state.f.close();/ x2 e( t6 O$ ~% u. k# \: _
- }
" b8 I, v8 l* L4 t9 M2 Y
+ \* b% U" ^! f3 u. G" i0 K- function setComp(g, value) {6 V& @9 c1 a. N9 l9 R7 G' j4 ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));
% \) q1 N; N( T- v8 V3 b' X - }
复制代码
7 D: ~% g) f4 {" Q; y8 D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。0 S. S$ u, h# ]- `
/ w5 y& W& x& M7 e
6 U+ r6 P' E4 T G! W* d. 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)1 p6 d5 Y }7 G7 ~( ~ M
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