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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。- t) A+ s! z+ p# D8 J' }
- importPackage (java.lang);- \+ v) c5 H5 ?& l- k e6 F
- importPackage (java.awt);
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6 R! y; c# J- f) m0 a# {7 c- include(Resources.id("mtrsteamloco:library/code/face.js"));' P, v7 X! F0 R5 N. T/ q4 H
$ @- o5 k) n3 [" \- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ D1 n# G7 ?- ^. o; `& E" ^
- n( d8 J, I- Z" R$ W- function getW(str, font) {8 _! h! P8 w3 n. N/ d
- let frc = Resources.getFontRenderContext();6 t$ V7 {/ o8 m
- bounds = font.getStringBounds(str, frc);' \6 O+ v3 o7 O0 f' w
- return Math.ceil(bounds.getWidth());1 u! k N7 p- D5 p0 I
- }* p2 G, n+ Z, h6 G
- * V- m$ ^3 y, T& g, v
- da = (g) => {//底图绘制. ~; q* ?9 o8 X& ?2 E. o4 N5 L
- g.setColor(Color.BLACK);3 d; P* c9 W! v5 Y2 q
- g.fillRect(0, 0, 400, 400);( d" x) @0 D* s. h- x7 I2 b
- }9 v; X$ a+ w1 a' m, Q% s
- % B' m6 E% G- e# O& E, c3 @
- db = (g) => {//上层绘制' J% i$ O; p% `
- g.setColor(Color.WHITE);
8 n) n' l' g- @ - g.fillRect(0, 0, 400, 400);5 \, [6 @, x/ [7 E/ g6 n/ N3 p
- g.setColor(Color.RED);& |; X8 Y1 X5 g3 y
- g.setFont(font0);/ F1 v3 ~+ M6 x" ^
- let str = "晴纱是男娘";) N2 ?/ ~* g S: K1 {+ ]1 n4 \& X. [3 s
- let ww = 400;
, r. N, d) T$ Y - let w = getW(str, font0);1 U9 X* N/ J" Q# Y7 y7 v, K) F
- g.drawString(str, ww / 2 - w / 2, 200);
/ m: d7 Z% S& t- J/ ` - }
0 m; H, |% W2 K- g - 0 y/ B' p4 Z5 T8 |6 R6 |' Z5 e
- const mat = new Matrices();
* e- _2 o. d6 V" I) E - mat.translate(0, 0.5, 0);% M0 d" C' M7 h- w
- - M! V, U v5 X$ Z& i. u
- function create(ctx, state, entity) {
4 W+ x0 k! H# I& m - let info = {- [4 [+ [. F; | h; A* f$ J# h
- ctx: ctx,5 p7 }! x+ j" K0 H
- isTrain: false," E9 J Z$ y, `; L
- matrices: [mat],1 I" b9 K; N/ w
- texture: [400, 400],
( W& _- C7 V5 {! I! d6 u - model: {
, p3 @9 @- Q( t, X/ r9 N5 ^ - renderType: "light",
7 f. A! t. b \0 _, r) s; G - size: [1, 1],2 @3 k% s# P5 b
- uvSize: [1, 1]
1 r3 R0 m' W3 J$ b# {, A+ Q# l - }- V% }1 {' M/ }$ p, B& Q* a, Y/ j6 V
- }
3 V/ t! \+ _8 }! T7 V& W5 | - let f = new Face(info);; j8 l% E- e9 Z
- state.f = f;5 J6 r9 Y7 n7 k1 e% {
- : B6 J: j5 v$ r) ?4 k7 J
- let t = f.texture;
+ f4 v1 |- @1 [ - let g = t.graphics;$ T% X0 z+ T" x- \4 i% j( x4 F; y
- state.running = true;
$ J- O6 }( ^ t; i4 P/ u, N( l - let fps = 24;
7 U! [: m4 d# M2 \ - da(g);//绘制底图
- l }* r* T1 H, V- g - t.upload();
# f; g7 ?7 B4 e2 u; j3 r, W - let k = 0;1 |/ n! z; |. ~% }- Q
- let ti = Date.now();' I" N1 y! \4 k! f: R8 N* e
- let rt = 0;
6 i0 g5 H% f: s O0 a - smooth = (k, v) => {// 平滑变化
8 }6 m, b$ G. Z3 d1 d - if (v > k) return k;
2 U8 ^2 \/ l3 J' b - if (k < 0) return 0;) s8 L# U4 y9 X! U2 U; e- S* P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. d: Z. K& A) u- W- [0 x - }# M z* u) e: n/ M2 ~8 ?- S
- run = () => {// 新线程
4 O( o7 L1 r9 h4 Q+ q w( x% k, j - let id = Thread.currentThread().getId();
. {$ s9 O! Z3 E1 p& `+ }* l0 q/ C - print("Thread start:" + id);: c3 k" x7 K/ b6 J
- while (state.running) {- r* W- [# a+ p, n* q5 e+ i, q% N
- try {
8 U% ~. V$ |! N) T; Y) p - k += (Date.now() - ti) / 1000 * 0.2;
% h9 u9 G$ V: W* e - ti = Date.now();3 s9 ~0 k3 @0 _ r! x
- if (k > 1.5) {
% T% f, S4 E5 Q( Y% } d - k = 0;
% J2 s: V1 _& n, m6 {' G* h - }) f( b# a# I" ^ V3 j
- setComp(g, 1);# x6 x; _7 o- s
- da(g);) b- \+ S) `9 G
- let kk = smooth(1, k);//平滑切换透明度
0 l1 O; c5 R8 p$ i( ^ c; a* f - setComp(g, kk);' J6 e- a/ C$ i s
- db(g);
8 R, A% \7 S$ U, k6 U3 B - t.upload();7 T8 t1 N$ P$ |, F2 e+ Q/ f F
- ctx.setDebugInfo("rt" ,Date.now() - ti);9 j5 ^0 p8 O" X0 C- ?
- ctx.setDebugInfo("k", k);3 E6 u7 q" p! j& y) |3 T h
- ctx.setDebugInfo("sm", kk);- e6 r: T- @5 @6 g9 A
- rt = Date.now() - ti; M, ~& q& B) ]7 x1 ~7 Y1 B: R; i/ v
- Thread.sleep(ck(rt - 1000 / fps));
6 o7 C7 O7 i+ c' t+ Q ` - ctx.setDebugInfo("error", 0)
- A7 s. }% _' P8 O: B - } catch (e) {7 w+ `$ ~9 N. t$ Q; J. \, F
- ctx.setDebugInfo("error", e);, U# s& i( E0 T5 `' I& Z& N% A
- }
; m' Y+ x' ~0 _, u! M - }
. v- l4 d8 w8 I9 d - print("Thread end:" + id);
* ~ x( p w# c, Y' } - }
( i7 @4 _# ~1 R1 E! s! x: P - let th = new Thread(run, "qiehuan");% G# v" g( }- G, j" ^% `& N# D: H
- th.start();% g# x% E8 D, G8 e/ c
- }
3 w M) s# P i @ - 2 L8 f1 r0 Q4 N3 x. [4 h
- function render(ctx, state, entity) {5 q- Z- }' M- f2 I! W: N$ n
- state.f.tick();
! Y f6 Q, @" l' ` w1 X - }
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; K* z( [9 e- s- function dispose(ctx, state, entity) { s( K+ t' a7 Z6 O7 g# o& V( V
- print("Dispose");
( j( J; Z1 H# }3 r8 ^ - state.running = false;: T& u# O( ? _& _- f
- state.f.close();% Y, @, |1 ^: a7 k# Y
- }
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7 F2 V) E3 ^6 @" F- b5 H- function setComp(g, value) {. `) J( L2 N u& y* y
- g.setComposite(AlphaComposite.SrcOver.derive(value));( N+ q' K- S+ z2 B! B5 |: j
- }
复制代码 1 p% u2 U5 E' P8 x
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。/ w3 W5 O2 v" c: D" C9 t0 [$ {
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" t2 H, V3 h+ `( q* l& [
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