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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。
' K5 H: f' \/ ]! c# s- importPackage (java.lang);1 a, D: N' f. c; c B
- importPackage (java.awt);5 p( k( w6 d+ l" n
* r/ {+ O- \& m, b: ]- include(Resources.id("mtrsteamloco:library/code/face.js"));6 I1 ^' b. h& }: C9 s; }
; A# E+ V% T0 S4 D u; d. Z9 D5 |; r- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {7 r; [& b* ]# [7 O0 B# e
- let frc = Resources.getFontRenderContext();
7 |5 _# [* s I8 V8 d' _5 B - bounds = font.getStringBounds(str, frc);
! j+ s! |8 f2 M' G1 s. z - return Math.ceil(bounds.getWidth());: G/ U+ R/ s9 ]; e1 L; i
- }
* I$ g* v9 f6 o+ K1 e3 C+ h - R- M% R+ z) Y+ G0 }2 C. g* y" i/ }" o
- da = (g) => {//底图绘制
- G# f- w6 _: y3 t/ z" f; ^ - g.setColor(Color.BLACK);0 j; j4 r3 O- \8 L' x" i" \6 w# W
- g.fillRect(0, 0, 400, 400);
2 Y: [' H5 F( g2 b0 g: [2 L - }
3 J l) d7 D- \8 i% B4 [5 z% Z - - n; j6 c' J- S0 [( q" b* y- M
- db = (g) => {//上层绘制
4 D' _: J: b @0 ^+ e8 P1 U - g.setColor(Color.WHITE);
, G/ U7 M3 s# u- [% O - g.fillRect(0, 0, 400, 400);/ q1 |# n) u# K, U
- g.setColor(Color.RED);" `% u, i, @" S% M) ?, o8 o
- g.setFont(font0); h6 @2 P, Y6 B7 q
- let str = "晴纱是男娘";1 Z* e! E4 b. x
- let ww = 400;
1 c0 W+ U a% @( x' a- d - let w = getW(str, font0);
' x! \7 t% x0 o. a+ W. C" h0 D - g.drawString(str, ww / 2 - w / 2, 200); h5 U# O: k2 K0 H" _
- }
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+ g) x, T6 M' X3 D4 p- const mat = new Matrices();
* {& K8 P5 Q* G3 A# M j4 G, ~+ u: q4 M# t o - mat.translate(0, 0.5, 0);
# F$ u* w1 r' d- }* g: M
2 m+ C2 z1 b, b/ S3 r. G* F- function create(ctx, state, entity) {, u$ z; q1 K" a5 z% U/ l
- let info = {
8 z: w' m1 Z' u - ctx: ctx,# g7 E& D! M9 Y) b: a, m0 ~. q
- isTrain: false,
) E) L! T" u( d5 w% G - matrices: [mat],
2 u# [2 U- k/ n( ^' T2 ~# v" z% r+ b - texture: [400, 400],# @, A7 @4 K: R2 r8 ]2 N+ [
- model: {' K/ |; S! G; T. o
- renderType: "light",8 Z- @2 ^) }+ L) {2 e2 H7 i
- size: [1, 1]," t8 T* Q# J' A( d
- uvSize: [1, 1]0 X) Z& G6 r$ L3 B/ y
- }
) ~+ n* p' l; F% K+ b - }
3 |) X5 N x# v g - let f = new Face(info);
! I- ^- b$ P1 E% ` - state.f = f;
5 Y# [' \# }2 m7 |- {8 n; ` - - L, S; u }9 v, ]3 Z8 ]# v7 f
- let t = f.texture;
. J: a0 y3 @: t9 m7 C- X G- F - let g = t.graphics;
0 O( |8 J& A! O: B @4 X% P2 |( R - state.running = true;! T( l1 q2 A* ]3 S7 ]! q3 v% [
- let fps = 24;
( k+ d% Z/ n2 K9 y* Z - da(g);//绘制底图
6 u' p5 l0 M% F+ X" o, ] - t.upload(); |/ }0 ?" {# F/ O w/ e
- let k = 0;
8 `7 q, M/ H1 |* j4 d5 w( K - let ti = Date.now();
$ n+ O& U% o& ?3 D2 x2 A - let rt = 0;5 c8 |9 `- o" ]
- smooth = (k, v) => {// 平滑变化
" L _% [$ J% ^. S- v5 f/ J/ A, X4 t - if (v > k) return k;
. G5 P* X& D* O; y - if (k < 0) return 0;; U8 m8 G; R& }
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
1 p9 g0 m' k9 m9 q4 c# U2 {) Q$ l# f+ p - }
, p; u4 D* M9 g- q6 F. F0 U% ` - run = () => {// 新线程
/ D) z, I$ D( s; _! d: v3 Y* w - let id = Thread.currentThread().getId();
. Z5 C; t* m8 K9 w+ l" T. v6 T2 m - print("Thread start:" + id);& E" i: H1 ^+ j& k( h
- while (state.running) {
4 U e8 K+ K, m* H- ? - try {) \0 y. S1 ^! ]5 P
- k += (Date.now() - ti) / 1000 * 0.2;1 u2 E& Z, A6 Q2 `- L+ S2 d8 c4 N5 p. R
- ti = Date.now();8 c2 v" T9 P/ n" W8 F
- if (k > 1.5) {
2 _1 G' V3 Z9 k" X5 y9 W - k = 0;! s8 }3 z0 L' t
- }
' `, ]! t( L2 d& ^ - setComp(g, 1);
+ B" Q: h4 g8 L4 f: ` - da(g);4 k; Z4 ~1 K1 f# [5 |0 P1 M1 b
- let kk = smooth(1, k);//平滑切换透明度
! I. x4 }0 j4 A$ T' ^ - setComp(g, kk);
0 l6 n+ H6 ` T3 y - db(g);- v4 w/ g' y) {4 Q( Z2 `) _0 }7 q
- t.upload();
8 c+ [5 h- i* u- R2 |4 i - ctx.setDebugInfo("rt" ,Date.now() - ti);
0 B: e& g) B; x* p+ I - ctx.setDebugInfo("k", k);
7 Q5 o% y% N, z* E - ctx.setDebugInfo("sm", kk);
0 p* B1 j$ S. V; Z+ k - rt = Date.now() - ti;! v d4 V l* T2 k9 @
- Thread.sleep(ck(rt - 1000 / fps));
6 Y# J j2 ~* P1 }/ O R) N - ctx.setDebugInfo("error", 0)
$ q3 j' r+ d' E- ] - } catch (e) {
3 Z& [/ }- V9 F: _ - ctx.setDebugInfo("error", e);
9 q, T% n/ O3 D& J% V* k/ e! B - }
- ~+ v8 W& Y) ^* h - }
' d9 u2 b' L o5 a6 R9 I - print("Thread end:" + id);
* u2 L" l" R; i$ H! a) w' R: M - }
6 n$ R# X% W# T4 @, F9 y - let th = new Thread(run, "qiehuan");: U6 i. v4 W( f4 B- ~
- th.start();
0 H. t1 a: T0 V% k; a - }
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/ s5 j$ ^$ s, [& F# |- function render(ctx, state, entity) {
8 ?' z5 ?: r# Q( w, o& k: o - state.f.tick();
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- 8 S8 k. x1 O' f1 L3 V
- function dispose(ctx, state, entity) {
+ R8 b8 h: f8 R n! `# b* r& J - print("Dispose");
" j0 _, C' u5 z4 }0 v+ Q3 s - state.running = false;
/ z5 A: G G8 K8 [4 V; [" @1 ` - state.f.close();' B) G+ T: k% C; v: z) w
- }) a. \1 [" G) [4 q
- % M! G* n2 u* C1 r7 q4 |
- function setComp(g, value) {; I& k/ N8 T# D1 @5 r# ^9 s- f
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. g3 m2 i* f. n& g0 P - }
复制代码 4 G6 G; a- ]( G- g8 T" `8 |& t8 u7 r7 e
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。- B* \/ [# K* a% }; O9 z
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). `' `' |2 a9 T* N8 {8 I5 F
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