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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。$ v+ H% r* W# u. _4 G# e$ z
- importPackage (java.lang);
0 ?; a( K3 q/ `2 z# W8 ~+ x - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));" B! e% s9 g5 a' m2 N
- , I" f5 \. ]- p- x/ }& q
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: T6 g+ p0 Q$ T0 q5 l
' S# a5 Q0 z% X5 }# H/ q B% ^6 c- function getW(str, font) {) R0 z: ]$ k; G1 ^# R! \
- let frc = Resources.getFontRenderContext();
( _$ t1 j4 _& k$ A - bounds = font.getStringBounds(str, frc);9 M$ y8 S- f0 S* N, k/ e; g
- return Math.ceil(bounds.getWidth());& y; A' X! m: Z7 q% ^; R* V `
- }# Q& M0 Q& Y" r9 R" z* a
- b" z9 T) m* g& a- da = (g) => {//底图绘制3 g0 G4 O. v. D+ J& k" k. k) ~
- g.setColor(Color.BLACK);! D& @* x; `& C# h8 a$ J" N
- g.fillRect(0, 0, 400, 400);
6 v m5 b+ Q. _/ D6 E6 |: d/ J- o5 F - }
3 ^* m4 h, [4 g4 Z - 2 b7 Y% F/ |+ L- }# l7 M
- db = (g) => {//上层绘制
" e+ W1 i1 l7 x+ T- T5 @. P - g.setColor(Color.WHITE);) j0 C- v( m2 ?* @
- g.fillRect(0, 0, 400, 400);& G- ?1 D% \/ e1 ^
- g.setColor(Color.RED);6 E5 ]3 ^3 ^2 V1 }3 C
- g.setFont(font0);
2 n, y4 H: C- B - let str = "晴纱是男娘";
! D) b3 p; l4 w8 D: \1 K - let ww = 400;$ A- B$ m( m3 t- G+ i! {0 [1 T% D
- let w = getW(str, font0);4 B9 h% T$ e. b, X9 n' j7 i
- g.drawString(str, ww / 2 - w / 2, 200);& p: F! f! }8 g6 U! c
- }
' P: }- B: a4 |4 y! \" X - ( C) T' B, m' }
- const mat = new Matrices();
/ f% J- e. R C' ]) H, d' Z0 u' q9 s - mat.translate(0, 0.5, 0);8 z0 U2 u0 ^ s
- + `; y. D) H' g& H2 `- { X; J
- function create(ctx, state, entity) {+ f% G2 p- i9 s) X/ {
- let info = {
! e( V- r7 {' B2 B$ g F- k) O% t& Z - ctx: ctx,8 O8 h- n& j) Q+ W- b5 n2 m
- isTrain: false,1 y2 z( e' x! G. p
- matrices: [mat],0 c- s$ N: x% ~5 l& L4 w3 n( E3 P2 b
- texture: [400, 400],4 W: Y" K7 q& m; _
- model: {/ B. F3 q3 ]6 [/ A5 T5 o/ x; s! R
- renderType: "light",1 J+ X5 g+ X$ \9 u
- size: [1, 1],0 i' P- o- N6 s
- uvSize: [1, 1]" X" ~; q% c% S
- }$ l. N* N$ }2 _- N3 A" Z$ g6 E
- }# s, B; _) A4 C# w5 E
- let f = new Face(info);
) {: p2 M4 h% W* Z% f' ?% J3 l - state.f = f;6 m% W9 m& l$ |" C3 z/ Z# E& ]
9 r* q% D6 j' E+ K+ V6 w- let t = f.texture;
" c0 q0 |5 k, M, d - let g = t.graphics;) g; l* E# |/ F* `
- state.running = true;5 p7 L# Q% S; ^) K8 Q1 L& @
- let fps = 24;9 f. D3 d" j2 I3 o7 a$ N5 t3 e
- da(g);//绘制底图% [& s% r3 q1 ]4 h6 o' W
- t.upload();$ n$ B+ P8 d/ z: x8 J9 s: q5 t
- let k = 0;+ F; r$ e' t" z4 p- ~) y2 J A/ x& M
- let ti = Date.now();1 q; b0 E/ f# G8 k9 j
- let rt = 0;
' {2 V0 T! Y/ O% ^ - smooth = (k, v) => {// 平滑变化
7 Z0 `$ R# u0 k/ p. G1 c6 _3 i4 Q, ?" C - if (v > k) return k;& j3 o0 [: y, I$ v5 Z+ F
- if (k < 0) return 0;
! f0 J: `1 D9 s* i* I/ P - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# S8 K" z( o+ s! Z1 h - }& [- \6 v6 Q- ~( y2 s
- run = () => {// 新线程
( J2 @4 Q8 u* V3 A8 d - let id = Thread.currentThread().getId();! M/ _2 z9 T7 t% I) E1 Z* @
- print("Thread start:" + id);
6 `# v* K- ]( a4 i - while (state.running) {9 H0 s) F# k; Z7 B
- try {8 i6 t1 }8 [5 t# Q
- k += (Date.now() - ti) / 1000 * 0.2;; P3 n" P6 h$ r, y
- ti = Date.now();
( O9 @. ^' g8 b - if (k > 1.5) {& e9 O0 E4 i) u9 ^' v [
- k = 0;9 V6 |! ^. g% j0 w3 t
- }
4 R. ]5 I, P+ h - setComp(g, 1);
5 ?: p' p7 z. d0 ^7 D+ _" f - da(g);) M- i* K1 e: D6 {, F
- let kk = smooth(1, k);//平滑切换透明度
/ `! Q2 A1 O3 n5 e - setComp(g, kk);* @0 V! T8 g' _4 d+ |8 H0 K
- db(g);) [0 w6 M9 K. y$ s' h5 b
- t.upload();& `% d& N: l) P0 B6 C! |$ _
- ctx.setDebugInfo("rt" ,Date.now() - ti);
Y6 w1 Z8 U# b1 c- f: M - ctx.setDebugInfo("k", k);; P. R& c# U! l' X% ]
- ctx.setDebugInfo("sm", kk);
6 K% I5 ~3 `, R5 y - rt = Date.now() - ti;+ ~! l' p& y R! j7 {+ s' P
- Thread.sleep(ck(rt - 1000 / fps));
8 g6 y4 M& X; \! F - ctx.setDebugInfo("error", 0)
1 G2 x" m4 T9 N) o; y - } catch (e) {
1 ^: R# Q1 {" K# ~$ u4 F9 e8 i8 }, M - ctx.setDebugInfo("error", e);
+ s$ N/ X# S; v8 X/ C8 N' W) |+ O9 H - }
# M9 S% v. I) e, z - }
9 B" |; L. f, ]& S( C# e - print("Thread end:" + id);
" | S; s' n7 X$ z2 Q3 [ - }
, ^3 y: K/ q1 v) s% @1 m' G - let th = new Thread(run, "qiehuan");" X% P& I( A, l
- th.start();8 L7 |" x% l) |, P y8 }+ x& ]
- }2 g3 b \$ f2 n& d. Q. ~3 o5 e
- ( @' G$ ?; a8 [, t+ x: Y0 K$ M
- function render(ctx, state, entity) {- W+ S4 c4 d; U- W& h P
- state.f.tick();! m# M5 L6 Z* M) U: W3 a8 ~
- }
6 v& ]3 p$ B; A2 W - ( U) K% q% M# c( a) R
- function dispose(ctx, state, entity) {
# q: t/ f) J8 l7 ^3 A3 Q4 O - print("Dispose");; a9 O8 q# Q j) ]
- state.running = false;
. ~+ |' v4 ^: f7 `6 Q9 T; M - state.f.close();
; G. f$ M( v! @9 j' J, |8 F - }# t+ x# a! T2 A$ f( L% m/ a
- 9 f8 Y' R9 \+ E' @2 a
- function setComp(g, value) {
# U, j# k' m K+ ~ - g.setComposite(AlphaComposite.SrcOver.derive(value));. V; W0 ]! f' x/ f: B
- }
复制代码 F- U& _7 w$ W3 Z; b! X+ Z
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。 a5 b% N! P7 }: X
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7 b$ K' D& F& E- {" W4 m$ n顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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