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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。/ {) ~& E- ~8 S) k
- importPackage (java.lang);. W0 R( e# R$ ]
- importPackage (java.awt);& a4 d. n* z7 z6 J; S3 P
# r( h. _" D; h: n0 D5 b h- include(Resources.id("mtrsteamloco:library/code/face.js"));
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0 F, U4 x6 f+ C. P' n' q2 L' n- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; f. B" }$ z5 I& J) D% a
- & u& c' U5 |7 X0 l1 G( X+ z
- function getW(str, font) {
8 w% _& O# a/ M: ~: t, G - let frc = Resources.getFontRenderContext();
; t# G9 d" \% A - bounds = font.getStringBounds(str, frc);7 O6 s0 x9 H/ K) W; E* C
- return Math.ceil(bounds.getWidth());
5 a, f9 F, j8 I/ p+ f - }
* i0 O1 B3 G. X* ]2 V4 I - 8 Z' h4 ^) y; B) ~ u1 }2 g
- da = (g) => {//底图绘制0 S( j+ t- l- I
- g.setColor(Color.BLACK);
$ x0 [7 \( T' K) f# V" r7 B - g.fillRect(0, 0, 400, 400);3 L5 o( T$ p6 P5 d4 s
- }
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3 Q* v. ^: i s7 Y% ], R6 |- db = (g) => {//上层绘制$ Q5 C4 ^+ b2 T! k1 F. ^" h
- g.setColor(Color.WHITE);2 P8 g/ i6 B! V+ b7 \3 D1 p6 w5 N
- g.fillRect(0, 0, 400, 400);
' b6 Y0 x+ u* s' S+ I - g.setColor(Color.RED);# u# w) b6 m, c: g3 u O
- g.setFont(font0);( w: G- @# b0 M" Q9 T5 g
- let str = "晴纱是男娘";/ P2 N/ }4 g1 W; w H G
- let ww = 400;- r. V! v- F! B7 C
- let w = getW(str, font0);
, h- H3 K3 H1 H/ N" [2 { - g.drawString(str, ww / 2 - w / 2, 200);( F, u/ k; I t7 N. u8 G3 L
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/ }% d% z0 v" S. d2 G8 `6 F7 p- const mat = new Matrices();! T; [& D6 {) L4 C
- mat.translate(0, 0.5, 0);
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" M: j, j% I" \0 m6 a6 v, T! H* A- function create(ctx, state, entity) {2 n% m' V- a$ A2 T
- let info = {& `5 K @4 z4 R$ s: C4 g
- ctx: ctx,9 P) f5 l a3 t* q( |3 \
- isTrain: false,- r+ O8 }3 M$ g
- matrices: [mat],' L4 _+ ~8 c: L1 H& `. I; f
- texture: [400, 400],2 C9 u" a* g7 C( d' E9 V' {1 e
- model: {
/ ], B( m- Z+ q! E7 D" n - renderType: "light",7 S" Q, D& l* u& \; s6 W
- size: [1, 1],% h, }, r* A7 f# }! p3 ^1 P% l0 S
- uvSize: [1, 1]6 J2 X( Z( Z) S7 l: ?
- }+ g# E: P; O, a }7 @
- }
/ b; P) z* m; c$ ~& M. n; Y - let f = new Face(info);
' W! L; J. x7 A3 U" P5 m! V* v - state.f = f;. G/ D5 n* j) p3 }, `, Z2 u
- Q0 p k8 |$ E$ B- Y/ i1 p- let t = f.texture;6 x& h% e" M1 {. t- S
- let g = t.graphics;
) I( ^# u0 t+ C; e - state.running = true;8 R0 \# ^, E9 Y# X9 f, ]4 n
- let fps = 24;
, \8 J' l, ~5 D" ]1 ^. l C/ ^- z - da(g);//绘制底图) c" N" Z9 O7 f5 d
- t.upload();; }% q. j& x' v
- let k = 0;
3 v! S3 K; X+ K" Y! A8 M" F - let ti = Date.now();+ d7 ]; G4 t Z6 l8 @4 |
- let rt = 0;: E6 D' | w. t# x# y# @2 j/ Y
- smooth = (k, v) => {// 平滑变化! Z, w. h; B) @* f6 Q
- if (v > k) return k;/ a3 \, }5 A4 y- Y
- if (k < 0) return 0;
) b- {8 R4 m' E: A8 W4 \ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;" v2 R* b: v' }& q3 m+ o1 U! `. _
- }- Z3 W- ?4 g0 d' Q
- run = () => {// 新线程' e! u( `3 @7 O- U# W3 {. G
- let id = Thread.currentThread().getId();+ S$ ]5 G* O9 T5 T3 u6 [
- print("Thread start:" + id);0 K+ N) G( A: c( o
- while (state.running) {' F: `$ Y7 n' ~
- try {7 I3 p9 I( H# }( y: ?
- k += (Date.now() - ti) / 1000 * 0.2; T0 G5 k7 q# M9 |+ C0 J% P# |, o
- ti = Date.now();
( h& Q2 v6 R4 o& D# M - if (k > 1.5) {" J+ X8 j4 M! w" U5 |" u& O6 z2 V
- k = 0;& R' u& T; j4 O5 m- P
- }
- ^' Q4 \1 V! r/ E2 B - setComp(g, 1);: J. Y) M/ t" m S, b
- da(g);+ T2 W1 S0 @) A! W' v' a
- let kk = smooth(1, k);//平滑切换透明度
# s/ y( l* S7 j# \8 U" U - setComp(g, kk);
. j V. x9 }$ @" U - db(g);
6 F! ^! U9 l6 Z; N2 k5 ]2 j4 q - t.upload();3 b+ L* m( z4 z$ H; u
- ctx.setDebugInfo("rt" ,Date.now() - ti);
/ _( I. O0 C$ N3 v& n/ ~* ~ - ctx.setDebugInfo("k", k);
0 m: d. F! H- A0 @/ t - ctx.setDebugInfo("sm", kk);
/ |3 U& I( X* n S6 O& g3 S - rt = Date.now() - ti;- E$ O* A+ ~& n. U m- |
- Thread.sleep(ck(rt - 1000 / fps));& v. j9 v/ P! m9 p) y8 P# R
- ctx.setDebugInfo("error", 0)
5 ` ?# v; B; a1 i8 M k - } catch (e) {
' T4 j9 M: |& V' H+ o7 }1 _8 U - ctx.setDebugInfo("error", e);/ K, r- `* O7 [8 j U6 ^- o
- }' l& E& c# W* K9 Y" ~, f+ ?
- }
8 B3 A9 h. K$ F - print("Thread end:" + id);0 F c% [5 S( S: X @+ }- H
- }
2 v& j. h2 }7 Z$ }9 G8 r k - let th = new Thread(run, "qiehuan");
' F6 s$ | |: v( B. O8 W; D - th.start();
' u* v: x. I" I+ e( ` - }
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1 v; p; P5 T& R- o, m- function render(ctx, state, entity) {
9 Z( J7 t9 s. l0 J, l - state.f.tick();! U! |, ^/ s" u8 b: I, c; B
- }1 G* U- @ W7 z+ @8 h% Q( G- }! ]) G
( }5 Y6 ~2 u2 N, v& H9 Q9 ^0 M# g/ j- function dispose(ctx, state, entity) {1 v4 `1 @; [5 y7 i
- print("Dispose");
+ c" u% G* _1 q - state.running = false;- V6 F( t4 \" b- ^- }/ u8 J
- state.f.close();- w. ~' L9 u6 x( ]8 h% [4 S
- }$ h4 }% b7 O: d% Y4 Q* Z3 P" H$ h' h
7 m |# Y2 G) t! L) v" M- function setComp(g, value) {
3 `2 n& R6 H. M - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 s1 y; ^' u1 k A2 c( h) k+ S9 f, X - }
复制代码
. \3 y$ l8 J+ D) ^, L5 j+ W9 j) c) V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。
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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)7 v$ R" u3 k$ r$ ^9 K+ o
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