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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。
9 ?2 X1 h- [4 O W4 \* r- importPackage (java.lang);5 h8 I% l9 e2 N6 Q4 A
- importPackage (java.awt);: a% p* a: g. g8 Y3 c( u
8 x! U! T, u. N% K4 s+ J- include(Resources.id("mtrsteamloco:library/code/face.js"));
0 X; i; V, m# x+ y8 s, n3 A
# g! T" Q G, g) a- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
& d; U- a! J8 E7 |
8 u: C( X( B: e h; A3 A- function getW(str, font) {2 F5 e$ C" i4 N5 @ d0 R2 f
- let frc = Resources.getFontRenderContext();
8 }. \: Q) W' t4 k* j+ t5 Y - bounds = font.getStringBounds(str, frc);
; c) M% o, | N+ U& v( ^ - return Math.ceil(bounds.getWidth());: f4 a* Q0 E' R0 ? @
- }. P8 A) O k% d4 M) k7 ~2 D5 g( k6 u$ }
- . I% \2 Y$ E% c9 G3 g: @1 q
- da = (g) => {//底图绘制
' K5 z6 y/ v ]3 c2 H - g.setColor(Color.BLACK);
$ o* Z) C6 K/ E$ m. o [5 R - g.fillRect(0, 0, 400, 400);9 p0 g8 R3 T/ M8 q3 p; P5 ], V
- }
* H. U( r( t" j" E& a2 S$ x4 s
$ Y1 l; k7 w0 Z/ A" L1 J; C- db = (g) => {//上层绘制
0 j# }5 \' `$ ?! ~; R1 v - g.setColor(Color.WHITE);5 d& U% a V! R9 J: j/ R
- g.fillRect(0, 0, 400, 400);. ]. d t4 |9 _2 B/ c8 s4 q
- g.setColor(Color.RED);/ p4 f2 W: q5 a" B6 A
- g.setFont(font0);
! k7 Z. q+ p3 O5 E; W5 ? - let str = "晴纱是男娘";
+ J( {) D$ D( K - let ww = 400;
% [& P, C8 T7 h* i* X. A - let w = getW(str, font0);9 T) B) s* `1 l& o
- g.drawString(str, ww / 2 - w / 2, 200);* p# Q8 S' i z6 g
- }+ W8 s" _# w- W2 {* A( I- H3 R8 M
, S: }& h" o0 D$ x) S4 b- const mat = new Matrices(); s. b$ k. N; i$ j3 v) m
- mat.translate(0, 0.5, 0);
$ b$ m2 ~3 g9 d - & N. S7 H% c# F; u6 _/ ?# n
- function create(ctx, state, entity) {
; P9 O0 g7 _7 v, ~ - let info = {
: p1 _8 ~, S* {# p - ctx: ctx,
( @( _, D; V+ t' u" s! U3 P - isTrain: false,
$ v4 ~8 k$ n, H4 T( C& c2 N - matrices: [mat],3 c# |! X7 ?8 y" H
- texture: [400, 400],1 ^0 F3 J* _: o# B
- model: {" o0 p! x5 H0 ]
- renderType: "light",0 I% U' J9 n/ ?8 U* d+ W4 @
- size: [1, 1],4 D5 A9 a# F5 d; y
- uvSize: [1, 1], ]* e6 n8 Z* P- p" e
- }* H0 G1 T5 S0 ] E7 k* H
- }
+ B' k; V5 l0 G - let f = new Face(info);! F# d, p, U- J0 r
- state.f = f;
0 z9 t8 ?- ?/ j0 w o9 o6 u) `/ H* }
, |% n; w8 T8 y D- let t = f.texture;
. a, \5 M( j( D8 Z& ^: Z* V; r - let g = t.graphics;
1 F" b6 e5 d" b8 p) ^1 F - state.running = true;
6 |5 a! k" c6 J" t x - let fps = 24;* r+ f! i* U k% ^ @
- da(g);//绘制底图( G6 y* J- U- C+ N/ b( d7 b
- t.upload();0 a" d% i \# `' S
- let k = 0;7 k/ [7 Y& h' t. D5 k8 B1 s
- let ti = Date.now();
- t' d) _1 d" x% I# l/ y { - let rt = 0;
# N- ^( I4 {, D - smooth = (k, v) => {// 平滑变化+ x1 g m' z7 w8 s$ l
- if (v > k) return k;
# s6 Y/ O3 Q/ c+ m3 t - if (k < 0) return 0;
/ p( e/ C9 J* D1 q/ N0 }3 N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
e+ r% D9 t0 E- \& k4 N1 V# m - }3 t4 {/ `- J) f5 Q( B/ x0 u
- run = () => {// 新线程' S/ D- v: V8 P1 b' |. B
- let id = Thread.currentThread().getId();/ V$ f# \9 H) E" P# |9 H
- print("Thread start:" + id);
, c4 H9 l5 e. G4 f. P& m8 p! \4 I9 r - while (state.running) {
* a/ Y8 t" v6 r0 G7 n+ n7 P - try {' Q5 \" f- `% |: q2 }
- k += (Date.now() - ti) / 1000 * 0.2;
+ x, }8 k) L ^ - ti = Date.now();
& B8 L6 M6 }7 x4 V/ M3 Q$ z - if (k > 1.5) {
A$ `# Q5 |& R* ^: F - k = 0;: y) t+ [3 p5 t) r( z( J
- }+ r O/ W0 H: o! E- c
- setComp(g, 1);
' X' m: ^/ X. ]3 G* b - da(g);" j# f' Y- {; r
- let kk = smooth(1, k);//平滑切换透明度
) ]4 G3 Q- R/ E6 r v' R, [ - setComp(g, kk);9 s; H$ b) w; S L
- db(g);
4 F8 j4 [, @$ E" \: y - t.upload();% O# T8 [* k% a% }6 I7 g, o
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ b. j' g; {3 @4 n - ctx.setDebugInfo("k", k);
0 z( e- P* K0 U! H# V6 v - ctx.setDebugInfo("sm", kk); b: T: W/ c/ G2 j+ V
- rt = Date.now() - ti;( M# k1 F. C8 R @: S7 n! B
- Thread.sleep(ck(rt - 1000 / fps));1 Q5 ]* R. O% {& o, x- h) w
- ctx.setDebugInfo("error", 0)
7 [4 U* `1 n& W) b5 S& b - } catch (e) {
- c, R% u# w/ j1 a% V& k1 _! s$ Y! @; Q - ctx.setDebugInfo("error", e);9 c$ |1 ]4 `( h0 X2 ^" o" }2 l
- }
$ o6 U0 n) g3 T - }: l* X# b% g# I( X$ H9 n9 R
- print("Thread end:" + id);
2 h2 q' `1 N7 N6 _& B; w - }& }3 L6 l# ~$ e3 k6 @
- let th = new Thread(run, "qiehuan");# f1 Q, H% r& C k
- th.start();' n W. i7 ^: ^/ z; O0 O' _, ?
- }
# K: R! ~, |, m$ e
6 ^# x) Y, ]) \: c7 s* |8 c3 C- function render(ctx, state, entity) {
/ R- U% J- _3 y - state.f.tick();
E7 K) K1 I" h- g( i2 ` - }1 s% ~7 e, A! m/ g4 l! ~" G8 ?
- + @( e% `" G1 E+ M {
- function dispose(ctx, state, entity) {
' S( e+ [. V' u - print("Dispose");) p0 M) o% Z% K3 m% q- `& S9 W
- state.running = false;
9 Z2 j# X$ c" a2 v; u - state.f.close();, J4 A" O( t" N; v* m
- } i5 _2 N6 Z) D
- 2 E2 _# V# x5 `+ v/ r' u+ f
- function setComp(g, value) {
+ l$ |" W% v8 } - g.setComposite(AlphaComposite.SrcOver.derive(value));' g5 a4 [. n; Y: n6 X0 m: X
- }
复制代码
F* [4 |9 a. q# J/ W4 m1 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。" o$ v; s, B, c, L/ s
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% U6 o1 h+ x) q# C顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)/ g! I0 M/ E: V8 P0 u! P5 R
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