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5 n9 _. c! T8 d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。
+ Q# ~- x' n, S) H7 S5 T% Q- importPackage (java.lang);
! N6 I2 B& B/ r- B1 W% z& m1 q - importPackage (java.awt);
$ l- S+ D* D. ~- ` - - s# c4 I- \5 ?2 ^8 O
- include(Resources.id("mtrsteamloco:library/code/face.js"));- C" ?! X/ L5 s- r
5 [8 G8 u3 |6 X( D# T7 H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
" S6 [$ M: z2 w( q' h; ? o
s# _* i7 t* P4 v+ k+ @9 V- b- [0 `- function getW(str, font) {
/ p/ ?6 j1 k. B+ X( U3 c - let frc = Resources.getFontRenderContext();2 c- [6 Z, v' |; m/ W& X- P1 x2 l
- bounds = font.getStringBounds(str, frc);4 P- O, E8 H- e
- return Math.ceil(bounds.getWidth());6 h; ?4 X2 M: ~/ s0 v) E, w; V
- }; a* N+ e* v2 z, M& Z2 r2 O
! L) b7 [0 W& M7 m/ _& n- da = (g) => {//底图绘制
7 s$ W, j1 J$ D& ] - g.setColor(Color.BLACK);8 Z/ ^# p6 _" l: T# {
- g.fillRect(0, 0, 400, 400);
9 b2 m$ D V1 V' E( r) G - }
3 X- S5 `0 T+ A. R
8 N4 R6 Q4 G1 v! H0 @- db = (g) => {//上层绘制) `, ]) U7 |& k8 y" _ Q
- g.setColor(Color.WHITE);. D A. F! v3 |, d8 P5 ^6 p
- g.fillRect(0, 0, 400, 400);
3 v M( h+ ^. Z, N0 |3 w - g.setColor(Color.RED);# X3 t& R; q3 V! f" U6 d6 j
- g.setFont(font0);6 t5 P: Q8 _' f c1 X$ S. |
- let str = "晴纱是男娘";
! Y: ]% {# d: G* N# M8 N2 r: n- } - let ww = 400;7 h; v' z- f( t' z3 j8 M
- let w = getW(str, font0);3 ?+ M% n) Q4 A* ^ H( U' V# P
- g.drawString(str, ww / 2 - w / 2, 200);8 f7 x0 c$ s/ s2 e! I+ k2 @9 s
- }
$ w& X5 V- m" _
9 d) W& c/ U% L1 _) H- const mat = new Matrices();
: `0 f9 h1 a* [. H( ? V) w! L) x - mat.translate(0, 0.5, 0);+ ` r: i3 m/ b! O' t/ g0 A9 Y7 t
- * r K# s7 \! x: q
- function create(ctx, state, entity) {2 s1 \5 D0 }3 \: `" C
- let info = {' q) S1 q' U1 k4 `
- ctx: ctx,
, E( O% d6 a0 O% f/ D% \ - isTrain: false,2 W: C! Q8 j" ~
- matrices: [mat],3 A! ^# X3 o; A
- texture: [400, 400],% P5 ?5 T6 ?' T. m& f# u5 ~9 E, M
- model: {
3 n }/ K3 Y4 i0 A, x) q - renderType: "light", |* T$ o) C" D& B: r5 B6 e- K/ o
- size: [1, 1],
. w1 |. i/ D3 g3 }# @ - uvSize: [1, 1]
4 {' `3 a6 `/ q M# x' ?9 y - }$ U) D7 E3 w# v+ Z1 _; d; @
- }7 N& B! U, I. F* a! M! a* F. x
- let f = new Face(info);3 m5 s9 y$ ` }
- state.f = f;1 T0 Y* d1 M/ l* O' J1 Z
- % w6 U, I3 R; F9 O8 v. c2 U
- let t = f.texture;* o' a/ B. |; U& c
- let g = t.graphics;
3 N: T# W$ G2 d2 _, R - state.running = true;
5 q+ `* w* b5 F" e8 B+ f Y- b( x6 E - let fps = 24;: K4 j3 } i$ g, c
- da(g);//绘制底图4 Z4 E9 ^ h9 s7 p! |
- t.upload();. ^' _/ N& d" B0 X: u9 e( t
- let k = 0;
1 [- a) D2 Q) l( B! v# n Y: a - let ti = Date.now();
# j: N" a% L9 s1 W - let rt = 0;. n. L. U# e/ ~& W+ G8 m( o1 ?
- smooth = (k, v) => {// 平滑变化
! r6 Q& M0 ]* F7 H - if (v > k) return k;
6 B% n! B) p4 |5 H8 y8 N3 q - if (k < 0) return 0;
; q- b, W/ |) A7 B$ [( J; P - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
; ]/ X4 O7 H! ?8 P, `, y - }
# H' z4 e4 x9 t$ S, q - run = () => {// 新线程
8 u* W( q' |4 L( H% _8 o* g - let id = Thread.currentThread().getId();$ y% f, r! V, k0 T" V) g7 O) X
- print("Thread start:" + id);
, G) b: X! Y6 B/ d - while (state.running) {! c3 R& q' p9 o3 d
- try {$ ?' j' W7 E: [+ d) b2 y
- k += (Date.now() - ti) / 1000 * 0.2;. Q5 K$ X( P' h9 @& J
- ti = Date.now();
6 s% H9 J) s7 z% v- ^ E6 ^% V# U: S - if (k > 1.5) {
! A# g; j1 K1 F; l& k6 } - k = 0;0 N" x0 |+ |- @2 w
- }
2 u" V( r# u' O8 g [ - setComp(g, 1);
2 R2 h$ J f8 t1 X - da(g);( F1 O X) s9 P: X9 F. K+ V5 B
- let kk = smooth(1, k);//平滑切换透明度
- s2 V! {- Q J - setComp(g, kk);
* |$ I+ l/ Q4 X: d4 ]8 x2 U - db(g);
# N2 } [4 b3 V - t.upload();# W* T) `# o& q/ X* A
- ctx.setDebugInfo("rt" ,Date.now() - ti);
$ r" M$ x8 X0 ~ - ctx.setDebugInfo("k", k);
+ i: V# q6 L5 e$ z9 g - ctx.setDebugInfo("sm", kk);, l/ q% d8 e( a0 A6 b
- rt = Date.now() - ti;1 E2 R* D1 j$ b( j) m* V
- Thread.sleep(ck(rt - 1000 / fps));* G( j' }+ [0 H# u
- ctx.setDebugInfo("error", 0)
& Q [* ]( ~* p. i4 D( T- f - } catch (e) {
2 u& P4 ^" g; z7 W$ x+ S' j8 `" c - ctx.setDebugInfo("error", e);
2 `/ ~! W! F) Y) j - }) P0 S5 J9 u" l
- }6 k9 r; `" R$ s6 r4 j# F
- print("Thread end:" + id);( K2 u4 _6 ^) n4 P
- }
3 U1 G# D3 T1 N6 D f. { - let th = new Thread(run, "qiehuan");
% A' D; J* I8 f% H - th.start();
5 j# K9 a J, F- q - }1 d" S6 @1 c2 `/ {2 j9 R8 M7 X
- - ?5 c) t# t1 B5 E4 n
- function render(ctx, state, entity) {# n2 T6 a9 F% Q, L
- state.f.tick();
% n# s8 \, A+ ] y: B$ a% u - }
! R6 U% h5 ~! t% H6 ~+ V. a - 2 w. n, `% W& v0 s) L" g& e8 X* Z
- function dispose(ctx, state, entity) {
6 M6 H& Y4 I" p% ]' Y9 B7 J - print("Dispose");8 o- q9 D1 F1 A! R/ {3 J( ~( `
- state.running = false;
: D6 r; |) q) e& V3 ^' n( p - state.f.close();0 Y& \8 M& x" m9 u$ b. S
- }
4 _1 D4 w& a: y - ( ` e& W/ r8 ^4 j3 h- L. k
- function setComp(g, value) {9 G4 i! d# x& X5 ~" S! C
- g.setComposite(AlphaComposite.SrcOver.derive(value)); Z4 e- _: d% M" Z5 p$ ]
- }
复制代码 $ z+ V+ C) h, x! a I
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。1 y% s9 @7 @/ e" \ h2 y
* h/ l( ^% S! ]& P
5 d$ `) }. s8 P( e9 i1 n( j顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). x. y2 K/ H% B: ?& I. p
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