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/ @7 l/ y) y# Q- C5 u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。1 q. c# C- G7 K4 r. |4 }
- importPackage (java.lang);
4 E( }! M& S- @4 c/ B0 ? - importPackage (java.awt);
% w8 r) A; h) e' }1 T$ K4 _
% I' U) }" z* U/ \7 Z: \- include(Resources.id("mtrsteamloco:library/code/face.js"));
/ ^+ I. H. i( b) g - : [" r. ~4 E% L2 h; L
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
3 ]. T5 R. R2 B5 z2 T, {2 { - ( w3 x4 d& [8 E
- function getW(str, font) {
* D' Q' T# s4 Z; ?$ S) C - let frc = Resources.getFontRenderContext();
$ }7 a+ o; e2 j) K6 W$ P4 u" W - bounds = font.getStringBounds(str, frc);
0 w. O6 y5 y' \: w - return Math.ceil(bounds.getWidth());
- t% u" j* d" O - }6 i0 ] ], r, s0 Z$ b
- 3 L9 J5 O9 ~: m7 G
- da = (g) => {//底图绘制: i+ z' \7 G2 Z# F( y
- g.setColor(Color.BLACK);
" t* C9 U, h( o& [" q3 s' I0 h& @ - g.fillRect(0, 0, 400, 400);
! U3 S* f: u9 m0 s: j - }
9 L1 W7 O' X) O4 L" d* g - ) |- S6 J I& D$ i @/ t s
- db = (g) => {//上层绘制1 M4 ~% t; v5 g( g
- g.setColor(Color.WHITE);) t! B$ N1 J! \: J4 y* s( @ V
- g.fillRect(0, 0, 400, 400);
6 @- p+ S% j% r7 |: a& [. B - g.setColor(Color.RED);5 } O d5 ]+ g' m, @
- g.setFont(font0);
- |/ {1 n/ T7 b( }) w; I) g& f - let str = "晴纱是男娘";; f$ D9 j5 Q% a
- let ww = 400;. `* o/ }9 R# i2 x1 c
- let w = getW(str, font0);. d/ a8 P s" R. r/ K9 i( X) n" }
- g.drawString(str, ww / 2 - w / 2, 200);. e' j5 ^ \ H) M# ]3 {6 b' z
- }( Z) z) q1 U) D, y* Z3 W; L9 T. O
( ~3 m/ `1 Z' P5 t# x% o. q- const mat = new Matrices();
' o! T; L# M8 @% z - mat.translate(0, 0.5, 0);( w1 @* q( W9 ~. j1 p
7 c& J' J9 x1 F* A1 {- function create(ctx, state, entity) {
9 J- v( K; V3 h# {" a8 f0 Z - let info = {7 @) L: m) o( Z6 t, j0 q# i
- ctx: ctx,' p9 _' B8 j; v/ B5 a
- isTrain: false,' {4 x; ~( ^2 H2 k$ j6 d
- matrices: [mat],
' c! R; N- _2 ^/ j! z: \ - texture: [400, 400],
6 ]! U0 m, o: f. D# i9 \2 @ - model: {
' p: F( j7 V, g - renderType: "light",, ~# q% H$ j" f7 n5 m& I
- size: [1, 1],2 S9 U: ~$ D( V% k8 T1 s+ y
- uvSize: [1, 1]
! o8 l4 C$ s5 B- T. r - }) U# }: T& m* u) N! G) o9 W
- }8 ]( p" C+ e" r) C: N( K
- let f = new Face(info);
% g2 ^2 @# d% b* ?/ x% D - state.f = f;
2 T5 Z5 l* n1 F* a, k9 [
1 w. P7 k9 _: ] a J# O- let t = f.texture;
2 M1 B: v; G7 q P: L" O5 r - let g = t.graphics;5 x+ O2 \+ A2 p# O( E% W+ A
- state.running = true;
6 i: I( ?; v, B+ w5 \ - let fps = 24;& F- \9 _* W: T
- da(g);//绘制底图
8 h/ S* Z$ O6 u; f3 w5 T9 A - t.upload();
- W5 x" ]* R; b& s/ ~ - let k = 0;
! c& b% d! R( Y/ T/ c! ]# l* O7 X - let ti = Date.now();+ P, q( u% }! ?# L- a5 V& L* b5 u
- let rt = 0;2 F( _0 a5 `$ p" U* s3 o; h
- smooth = (k, v) => {// 平滑变化! F) c; D( C. a4 e( d! l# h3 P
- if (v > k) return k;
2 A7 z; N2 j" {/ q - if (k < 0) return 0;
3 w5 }9 v3 y% _3 x - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* f: Q! |$ H o3 L$ b - }9 y8 N! B1 F8 {
- run = () => {// 新线程
& B4 M& P+ I& z4 }: A$ ` - let id = Thread.currentThread().getId();
6 z9 ^/ G$ g$ F - print("Thread start:" + id);
9 }/ D& t% d, p4 \+ F* p - while (state.running) {
) J0 L! z& G8 x4 g' Z - try {% j3 m. f7 l" e$ l/ H3 l
- k += (Date.now() - ti) / 1000 * 0.2;! h$ ~) |: x/ k; W1 `0 [
- ti = Date.now();1 ] T# x5 ^4 J3 d
- if (k > 1.5) {6 w2 D2 y, }" a1 T) e/ `
- k = 0;
# `3 J5 C2 t! b' k0 a7 Y - }
: H8 @9 @8 t" C1 b - setComp(g, 1);
. h9 j3 X2 y: w9 D( ^ - da(g);
( \7 U# w' e! f+ J. f: Y - let kk = smooth(1, k);//平滑切换透明度
/ q2 h1 g8 _- |) I/ P" a1 g+ D5 S - setComp(g, kk);; s" M' a+ c3 B) J5 c
- db(g);$ C. u' l3 B7 H- J
- t.upload();
2 e' l; Z) n. Q# Y1 Q# L - ctx.setDebugInfo("rt" ,Date.now() - ti);$ r0 T- i+ a; t2 e( H
- ctx.setDebugInfo("k", k);
: T* q* T n9 r+ \ - ctx.setDebugInfo("sm", kk);
% k4 |4 z7 T7 S: v+ \ - rt = Date.now() - ti;- z! k" _7 f, F @: u
- Thread.sleep(ck(rt - 1000 / fps));% U+ `/ b$ @+ D
- ctx.setDebugInfo("error", 0)
( e6 h/ l* R: b4 @5 y; ?" ]# i - } catch (e) {
. m0 A! i K, H5 } - ctx.setDebugInfo("error", e);% y3 r1 e" S8 Q# j
- }9 Q7 U% m( P7 `) G# O& u7 n
- }
/ j2 f8 E0 A; l/ E2 { - print("Thread end:" + id);
0 b& E/ z5 @$ U, ` - }0 c2 i+ F2 V) w5 z" i
- let th = new Thread(run, "qiehuan");0 e4 E/ w# B1 d- l
- th.start();& [/ H1 u- Q& o, d
- }
; E; g8 X; ~! d- d- ^9 y
+ L: g/ y; Y* f* u V' f+ i5 X/ h8 m- function render(ctx, state, entity) {# F5 D8 X' h9 c% { r' [
- state.f.tick();* g8 S- m p; |2 e+ i) h7 M$ d
- }& ~5 J, J' e o+ b* p0 L6 {: B
- 4 J6 e" I3 v$ E9 ~' }5 U! [9 C6 |1 E
- function dispose(ctx, state, entity) {0 p! ^5 ?3 T3 z* I
- print("Dispose");
9 t0 P8 |$ ]) I% c$ A$ z - state.running = false;
, Y; n: n6 O$ n4 k - state.f.close();
0 p# A% p1 T5 j) D3 N' Y - }3 [- v0 x& t- \; L
" D$ `0 T/ C: s: G- function setComp(g, value) {
: a$ ^2 l$ B* ]6 t- h! z - g.setComposite(AlphaComposite.SrcOver.derive(value));
- e3 \! g' X8 Q" t - }
复制代码 ) _; f& i" n; f& x- M
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。
* Y3 |1 a4 G& _: y0 s# p) d- a1 W3 g$ a7 S' h1 H
9 y( x. d) M- ^, @9 M N$ L顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)- @- D4 |2 l3 H$ {
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