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) K$ P6 ?6 C- J- c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。
/ F' k1 Q0 l G- importPackage (java.lang);
K C* Q; |8 ^# @6 n - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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/ ?( I; K( A) v n! F% `, _) H; x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
5 W, _7 V2 U3 T! P3 \. S+ P7 @. y - ( K" O$ v; b( t$ M0 y1 D& G- _( {3 a
- function getW(str, font) {
# ^2 U0 x4 E( ~4 x6 Y* S; |( f$ e - let frc = Resources.getFontRenderContext();% c2 V" E" d. y0 d
- bounds = font.getStringBounds(str, frc);
, d9 B/ l- ?- O8 o" s" t - return Math.ceil(bounds.getWidth());0 \& a* y; T. ~; u
- }
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5 p" X+ M" K) c$ Y. y7 K! c; y/ F- da = (g) => {//底图绘制
7 W% P @+ v6 v( H - g.setColor(Color.BLACK);
; s# ]- C6 i0 i# g' u& v- p; C! L - g.fillRect(0, 0, 400, 400);
6 B3 i0 y, S; _& l/ b. T - }2 g- N/ f+ E( D, n! W7 x, A3 S
8 n* W3 T& E/ I- db = (g) => {//上层绘制 l- m, P; C, s% f; s) |( \% W
- g.setColor(Color.WHITE);
A# `: O7 j( K3 Y$ E$ ~ - g.fillRect(0, 0, 400, 400);
0 B8 R0 H: @ j2 c+ r3 l - g.setColor(Color.RED);( g/ K7 M, d8 ~) {/ o2 v9 O- |7 ?
- g.setFont(font0);) Z* d1 K' e9 Y9 J& G# w5 S
- let str = "晴纱是男娘";
2 L. N L9 B8 F7 ?% B2 m - let ww = 400;; q3 N P5 G H. [- C9 v1 p
- let w = getW(str, font0);
6 l4 J4 G5 X6 q2 l- t3 r - g.drawString(str, ww / 2 - w / 2, 200);
( A! z8 _: S4 Q( c1 m$ K - }
; v8 e ]5 k1 B3 x+ P - . G7 M! r9 K3 A2 }3 L' ]
- const mat = new Matrices();
; Q6 m, A* x( i$ y3 ~/ ` - mat.translate(0, 0.5, 0);
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6 f# h7 f' I( i, p- function create(ctx, state, entity) {- v% Q: \6 ]3 K7 B! C/ }5 i- _
- let info = {5 v: I( p1 s" g& j9 l D0 O6 U
- ctx: ctx,
b$ o8 i& t6 [, [. m - isTrain: false,0 [& r5 ^8 f5 L
- matrices: [mat],# [( l! e# }9 f- F. O
- texture: [400, 400],
7 ~/ W S4 ~1 L! K0 }2 w - model: {
5 ?$ {! p' x8 b9 v+ F - renderType: "light",
0 g6 I2 R0 A+ u- f) o8 ~, H - size: [1, 1],2 k @- r4 L$ r( T7 v
- uvSize: [1, 1]
, S! u M$ n. I, d! ?- v9 D6 L - }, w6 m0 P9 y& s% ^) Q
- }
7 }. i: j- ?( [, ~ - let f = new Face(info);
2 t; A, Y: [8 v8 |8 E, p - state.f = f;
. _7 c8 y; I( e( d$ K4 l - : f( V% O5 V6 t1 @. {
- let t = f.texture;
1 t% a: z4 _- o) \# t - let g = t.graphics;
% g+ ]0 R9 v3 z, w6 V2 _; ] - state.running = true;
5 I% p) W( ^- |1 l* L' p - let fps = 24;
& |% `' c8 E9 b) z: S* t6 S - da(g);//绘制底图' I& V# g$ {; i) `4 \
- t.upload();
4 b9 Q3 f" H- I - let k = 0;1 A* Q. `- E) w" w5 v
- let ti = Date.now();( ^7 q$ O; Z% I, i4 F! `
- let rt = 0;0 k: z! W o l- u
- smooth = (k, v) => {// 平滑变化9 F. s4 p0 ^/ _( y& h( j
- if (v > k) return k;
2 ~0 C; q8 D: B$ u* Y2 d8 W - if (k < 0) return 0;, f! Q5 F3 v9 l4 y
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
2 k# ~) ^- |/ b - }
M2 ^6 b+ ^1 g1 J/ t - run = () => {// 新线程7 a# P) I( r! p
- let id = Thread.currentThread().getId();- x7 }6 G& V! q, x& [8 a( _5 l
- print("Thread start:" + id);
, E+ Q# U0 h6 Y. w; b - while (state.running) {
* a8 D8 T" J2 I4 N/ A( a. K - try {
; y$ Y# Q* i- S% K* G# z' W# W2 ]2 D - k += (Date.now() - ti) / 1000 * 0.2;
, J* O8 p" X* `1 K - ti = Date.now();% o3 W# o( A3 k: m6 x
- if (k > 1.5) {% y2 t7 \+ O# |
- k = 0;& A1 I U! b( |# R( W/ t8 Z
- }
: p) R7 j1 j( u7 P2 I" `8 q - setComp(g, 1);; \8 X+ H$ ?/ S {
- da(g);
8 n9 u& S, N( n) H. Y - let kk = smooth(1, k);//平滑切换透明度
9 _1 E: u- `$ K+ u* A' p - setComp(g, kk);
9 }, a4 A7 |4 K0 A2 L2 t! { - db(g);+ Q, o; E3 O, @$ \! k- i
- t.upload();
+ W) \9 L% T4 h - ctx.setDebugInfo("rt" ,Date.now() - ti);- S7 _9 b7 Y1 a# m e: e6 [
- ctx.setDebugInfo("k", k);
5 B8 b7 O$ I1 Z+ X W6 x - ctx.setDebugInfo("sm", kk);
+ n- ^6 @' z6 m5 V" z# H# m - rt = Date.now() - ti;: }7 j& B# {" U% t1 {$ E- L% b- m
- Thread.sleep(ck(rt - 1000 / fps));
, A9 C0 w# w) A6 W - ctx.setDebugInfo("error", 0)
9 p; ~ u& W* W' C& p - } catch (e) {6 P5 `. n2 T8 a \0 H! R3 Y
- ctx.setDebugInfo("error", e);! R1 T Y7 E, J. H+ G* t: D6 p
- }! {2 E: p. A2 S
- }
, Z; K* q# K- T1 I) Y O* F - print("Thread end:" + id);0 c' O- D! m! c: k% j& s% W- W; L/ k
- }
+ p1 O2 J9 Z E3 I) j* S* b - let th = new Thread(run, "qiehuan");& b+ a* o8 D2 r& Z/ q5 M5 V5 @
- th.start();
9 Y' F, e# y6 \ - }
( s7 _- m$ Y& l3 E& B$ } - ' o* X% u* a% P; Y9 K' w2 ^
- function render(ctx, state, entity) {
* a/ a* a+ }3 e3 s - state.f.tick();3 S. [% h) }0 f4 _8 e/ F
- }/ ^ B% h0 b; d; U- V. m
5 {8 e$ A1 |1 d7 k# Q- function dispose(ctx, state, entity) { x8 b, R, y y' i+ [
- print("Dispose");
" \8 L. D5 s5 D. {8 ?( n - state.running = false;6 U5 z! `- A# q9 U1 h7 O! Z
- state.f.close();
' N2 h7 P" Y+ o: D% l6 h6 E z - }
7 c9 h6 c$ a+ m# q+ ~ O5 K
% s& S6 L* o3 D- function setComp(g, value) {
8 C* D8 `0 D2 D O - g.setComposite(AlphaComposite.SrcOver.derive(value));1 Y$ m) r4 e P( r4 U p
- }
复制代码 ) O: J$ o" p0 f7 a) i. |- F7 K
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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?. R1 e1 w& q V! A- h顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)9 _) s) ?; X/ O9 N5 g) f; `
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