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) U/ K m) N S3 B! k a% 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。1 V$ F9 e0 Y5 e' {; ]
- importPackage (java.lang);4 P8 I7 o3 i* L
- importPackage (java.awt);
8 L8 D3 b3 w4 X c8 v - / I' ~0 b' i/ |" V3 U0 a
- include(Resources.id("mtrsteamloco:library/code/face.js"));9 s+ }" l0 X4 k4 {) K; P1 z K/ m
- 0 I R* k, S( P) I% Y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);; s) o- Q* ?2 _$ I' _. s* B
9 C- }1 ^* z: T8 R- function getW(str, font) {
/ C b2 B0 Q5 y8 d0 M6 s - let frc = Resources.getFontRenderContext();# X7 L' f o$ [
- bounds = font.getStringBounds(str, frc);
2 I+ M8 l8 e7 L3 \4 R3 m, i$ { - return Math.ceil(bounds.getWidth());; D8 d+ _, c% z" u
- } q" z& z6 \0 ~/ k
3 b" Q" r3 f+ N- da = (g) => {//底图绘制 K, z( E7 P0 ~- q( n) q+ k
- g.setColor(Color.BLACK);
% G/ q, l U! ~3 n5 i& l# I - g.fillRect(0, 0, 400, 400);/ j4 ?. |, S6 ^0 m5 l
- }
5 E) ?4 l& C0 C6 i# Y - ! w& i, o( \* G* i/ x
- db = (g) => {//上层绘制1 O0 O' N) i& Z" ^
- g.setColor(Color.WHITE);% k- n0 @$ a2 N# E
- g.fillRect(0, 0, 400, 400);
1 m/ X) \5 I, x8 o. ]1 @ - g.setColor(Color.RED);
8 N' Y: }; s- ?8 Z% R, G - g.setFont(font0);
/ }% {# x: U" B% m - let str = "晴纱是男娘";% m- Z, X- ?' n* }( h' r$ g9 Z
- let ww = 400;
8 G, C0 K- W) a( W& V - let w = getW(str, font0);
& S+ L& O) i7 ]- |/ W" p( t& f3 Y - g.drawString(str, ww / 2 - w / 2, 200);$ T5 K2 g3 ^. e" B$ r+ L/ E
- }
( }" W3 F& s1 O4 W" b: o
- E# v- s/ X8 B- k8 `$ H- const mat = new Matrices();
. d" Y6 x$ k- m. [5 a0 ] - mat.translate(0, 0.5, 0);
+ k% h, f( t; C" q5 i - ; Y! ?( ?, K- y
- function create(ctx, state, entity) {
, O( p; i8 g8 \ t/ K) O0 v - let info = {( ^8 I# o3 [7 _, p7 E4 \
- ctx: ctx,4 s3 j* t9 Y5 ~& R, S
- isTrain: false,
! l o* Z8 q9 m. I; o8 A2 Y# c - matrices: [mat],
; f9 a* a+ h' U! Z: b1 V - texture: [400, 400],
. Q1 A& z$ q8 r# u' F - model: {
! y) t _* p3 p: B5 Z7 w" H - renderType: "light",
9 s! U9 ~8 t0 E! B, g0 P - size: [1, 1],
8 I9 o# ]+ _5 x$ Q1 { - uvSize: [1, 1]
5 b! @: w& I. Q+ v: y5 D - }
: }: V4 S* ^" Z/ R' @ - }
) j1 m: U* h B& G& v3 Y/ a - let f = new Face(info);4 I: a0 C% L2 ^* ~6 t! b6 Y& y* b4 P. {
- state.f = f;: g# l# v" P' \ \
- ( n l+ t/ C' k( ]8 \, N: N. |
- let t = f.texture;
, I9 f2 g& g2 T$ b3 s! z$ ? - let g = t.graphics;% T2 A6 X+ V/ ]# F7 C9 D7 S
- state.running = true;
' p( V; b8 n' U- J - let fps = 24;
Y a/ N1 A* o - da(g);//绘制底图4 g- F; l% R- f
- t.upload();1 G t% G5 [, L# o
- let k = 0;
: _/ t- Q' h, J9 v - let ti = Date.now();, l( A0 A5 C; u) A0 |9 w4 M
- let rt = 0;- ?2 ]% J# v$ I7 K" |
- smooth = (k, v) => {// 平滑变化' l2 v+ E* r& ^" ~) i; r; y
- if (v > k) return k;: I% g# l i; C7 q
- if (k < 0) return 0;. O" V7 ^% A( V ]& {8 ~
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
; `. p$ q) [% E1 V: f4 x% y) l0 m$ w7 D - }
' w7 p# ?( K, I2 [ - run = () => {// 新线程
2 k1 o( Q/ X1 G# t7 p - let id = Thread.currentThread().getId();
D& M; A! x9 ~# M2 E9 P - print("Thread start:" + id);; J) {: S1 D& N' a( l
- while (state.running) {
1 t6 z+ t* y" S- e# s - try {* {2 Z2 m% r! _4 h* F0 k0 d% J& B s5 X! J
- k += (Date.now() - ti) / 1000 * 0.2;5 P8 [9 i2 h9 R# B* b; N+ i5 i
- ti = Date.now();. c+ M. b' }& I1 [% ^6 G* v
- if (k > 1.5) {
) w5 d) s, W ?5 _ - k = 0;$ z" Q' w6 E4 \7 r0 ?
- }; s p& Q- m: q6 A
- setComp(g, 1);( A' W# E+ R" v$ E" o z$ [% \ w
- da(g);# I* p0 x* B4 }
- let kk = smooth(1, k);//平滑切换透明度
7 Q& _9 [) P$ P2 ^/ r - setComp(g, kk);& L5 A: \2 i+ R1 I! V7 e) h
- db(g);. V4 }! x/ C4 K! r/ ~) w5 E; w- Q
- t.upload();+ S& |. \6 F& y2 n* V6 U4 t9 C
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ K' M5 ]% Y! `! {1 Z+ ] - ctx.setDebugInfo("k", k);2 c) @* B y. K; m
- ctx.setDebugInfo("sm", kk);
6 L5 I( E$ Y) P3 L" S - rt = Date.now() - ti;
+ V" [, V6 \" L- `+ e, Q5 W y - Thread.sleep(ck(rt - 1000 / fps));1 x2 m. ^# j6 L$ ?" Q( m% v
- ctx.setDebugInfo("error", 0)
& f2 y, m4 @% U: j( ~/ K% R - } catch (e) {
/ P2 D5 z/ F$ J% Y9 L$ S& w - ctx.setDebugInfo("error", e);: [4 ~: Q& P F) d9 N
- }
1 S7 }% f4 U8 C2 B, e7 e- | - }5 p' t4 M, ^" D* |; V5 g/ W$ `
- print("Thread end:" + id);* `6 s9 g4 l/ z7 T5 p0 _ R
- }& z$ N3 D# u- k# O* R1 ~
- let th = new Thread(run, "qiehuan");- g# d# k3 g9 X0 L/ t5 i/ j# U
- th.start();! G' f! a% V7 h: T; J
- }# O9 i5 ~/ }% `0 e7 s' @+ J! n( L
7 m! I: ^7 e4 F" ^: n- function render(ctx, state, entity) {
4 S1 [7 g$ R8 P4 G - state.f.tick();# ]8 L$ t3 D- C0 g. h
- }
) s: o2 P4 h* O6 K - ' P8 I" v- R5 _
- function dispose(ctx, state, entity) {
. Q- c" H, y& L; H - print("Dispose");
0 ^9 q8 _( X! z5 s - state.running = false;# Y7 t+ @' U7 B! P. T: D
- state.f.close();
, U" s1 V) O5 T" K - }
% n' i' G4 A! z: ^
6 I/ W/ @4 ?8 B% @$ \2 _! w5 H" R3 A- function setComp(g, value) {
+ s( F6 u2 s! |* E! ^6 }9 R5 | - g.setComposite(AlphaComposite.SrcOver.derive(value));0 @" u0 r q" O0 O0 Y7 r: \! z9 L
- }
复制代码
. l, | W" J/ V1 V; 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。
2 ~$ D& I7 w, d; L" T4 Q. c: V* B9 J4 W" x0 Y2 G, k
# k2 C/ R& a9 Z8 r- \ B" V8 k顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% f; c! b& h" z# j2 N' X6 W. k, t
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