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5 b1 | l. w7 j$ G7 n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。, m) Q1 ?& w( |6 Y( ?4 o/ k
- importPackage (java.lang);) ^$ u3 g( l) F3 n/ w/ S1 h {
- importPackage (java.awt);* p1 ^2 m9 L1 ^
- : z/ H+ p& {" y' w. q L% X5 V
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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0 I$ Y9 x) x# _& g& T- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);- k: ]* E+ F n2 g0 p. V: V1 U# ?
- " w5 e" q$ E0 ?& k8 N4 }' e$ K/ P4 \
- function getW(str, font) {
" [5 M3 K) ?! m. ]- Y, l9 W - let frc = Resources.getFontRenderContext();3 ^4 M# x% G8 T: J9 T8 H% W
- bounds = font.getStringBounds(str, frc);0 E$ G# N1 E$ w. G
- return Math.ceil(bounds.getWidth());& a" Z$ P q2 l7 W7 e( h
- }
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- da = (g) => {//底图绘制0 B" Y; w8 B% M L' j. V$ B
- g.setColor(Color.BLACK); t z8 G2 l) S: v" S6 P
- g.fillRect(0, 0, 400, 400);
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- db = (g) => {//上层绘制2 M, }% y, E- g: w: A
- g.setColor(Color.WHITE);
1 k/ p2 `1 z- }; a2 F1 l - g.fillRect(0, 0, 400, 400);
R4 A7 x8 X4 W - g.setColor(Color.RED);
1 G7 n$ @" o% t T* w - g.setFont(font0);$ s2 g8 Q1 f" q# L: ^. ^
- let str = "晴纱是男娘";' v5 b0 }% c- \( z
- let ww = 400; | C! S. }9 x" l/ l+ U$ r' ~* Z, @
- let w = getW(str, font0);
4 I3 }/ w' s7 K9 } - g.drawString(str, ww / 2 - w / 2, 200); w* ]- R, e ]5 C% o* L
- }
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- const mat = new Matrices();% _# q/ I, Z* ~3 U' Q$ u
- mat.translate(0, 0.5, 0);
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7 u0 W2 L) A- l2 d2 O; r8 x- function create(ctx, state, entity) {% k+ l# D5 O4 g% [- C' Y
- let info = {
! U/ |% j b- q3 G, H( U# _1 o% k - ctx: ctx,
u) O* ?& d. b2 D1 ^0 I& b - isTrain: false,
6 d: T/ L, y( o% ?7 q; v - matrices: [mat],& i! D2 D% {( S+ y+ L
- texture: [400, 400],
$ S" I9 k2 ^* L7 | - model: {
) R: W( V: M' I- j* y8 S - renderType: "light",; q @% J( G" ^- b( v- Y+ d& V
- size: [1, 1],
0 J% }7 r4 p6 [ U6 S2 a- m - uvSize: [1, 1]
+ [% ^; j) w& }3 c! X1 M - }; m. X- t; s2 A& M1 A5 U9 m9 e b. C- ]
- }2 c& \4 ]/ q- j
- let f = new Face(info);4 W/ g- w% f1 j* l) r
- state.f = f;& _1 [, |, m9 z; c7 }
5 y% Q' ]7 g, v& |/ V' v- let t = f.texture;9 N8 I' Y8 I3 C% ]5 T
- let g = t.graphics;
4 T0 J& H, G/ q8 I o4 ?$ X - state.running = true;
# F4 X7 m! V; E* C) u( e - let fps = 24;; a% o9 k$ G T5 n9 Q2 H. X, L" C
- da(g);//绘制底图" a1 @& W5 d6 x- y2 K
- t.upload();6 O8 C# A& F# W& t0 ]: C
- let k = 0;. D9 c3 b7 L5 D
- let ti = Date.now();
1 x' a; i1 a u7 @/ n) q% p. F - let rt = 0;( K- ?9 c, B* n- }" P: d; C' T
- smooth = (k, v) => {// 平滑变化
! N6 e( A g6 v8 B3 { - if (v > k) return k;
' U4 Z3 E& H6 U2 J3 Y- e" @ - if (k < 0) return 0;
4 j0 i& m2 L! p& W4 v/ q/ O+ p3 R - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: N. o, @! N( {- C) S4 z
- }
' k3 ? ]7 R! ^9 u( D7 ~- @3 o - run = () => {// 新线程$ p( Q* k/ f U* `6 X# g7 F7 `7 L2 q5 S
- let id = Thread.currentThread().getId();
1 m) E9 w, H5 v' [* Z x- ^ - print("Thread start:" + id);
6 G1 P) `: C. G2 j) D& q - while (state.running) {
n6 ?& t ~' U$ u - try {. Y9 D9 R4 k. ?$ W7 F4 l
- k += (Date.now() - ti) / 1000 * 0.2;
( r6 |; k0 W% d - ti = Date.now();
4 n% m; T- w, B6 I" x, A - if (k > 1.5) {
# F2 E4 ^& N/ N) p - k = 0;# X& [ ]: V- `
- }7 O, G, y, y& a- E4 ]+ q7 R6 t
- setComp(g, 1);
6 H, L# {" [# _9 W- s; t - da(g);) k; }8 y( H3 F/ k; \
- let kk = smooth(1, k);//平滑切换透明度/ p$ s; n5 t: [# i1 Z! l$ _
- setComp(g, kk);& I4 ~+ P2 q/ W y( \ ^3 K3 {6 k
- db(g);
6 U( R9 j1 b! u% C: u/ f - t.upload();
: E$ @' d9 W* O, U- ~* I - ctx.setDebugInfo("rt" ,Date.now() - ti);1 e: {( k1 ]/ X! x4 t6 O
- ctx.setDebugInfo("k", k);
0 n M# o4 U( k' R - ctx.setDebugInfo("sm", kk);
E$ }) q" T: |3 d& F9 K5 ~ - rt = Date.now() - ti;4 c1 M$ p c- P% P; J' x
- Thread.sleep(ck(rt - 1000 / fps));
# }, G! [* p# y. Z+ D - ctx.setDebugInfo("error", 0)
0 w8 i2 n( [4 J3 d0 n0 O - } catch (e) { L; ~( K. ~$ r5 y' i8 `/ g1 s
- ctx.setDebugInfo("error", e);
, O6 M; m4 q: T$ @) P - }
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- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");+ R9 y! y. C% x' @% j7 d. J
- th.start();
8 N; u) n4 f: q# k; ~ - }
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8 B6 _3 P: }) K7 C; c \* b4 H' C$ E- function render(ctx, state, entity) {9 C0 Y) Q3 D+ ]2 D3 g7 Q- {3 m
- state.f.tick();% x/ ]. o" L% {5 }4 \
- }* Q7 I# ?& J: K& o9 H
- " c7 P! B3 i2 w
- function dispose(ctx, state, entity) {
9 D1 T8 P. a4 q6 Q- E - print("Dispose");& Q5 J* V: n% _# V
- state.running = false;. L! E* Q0 m8 m/ @
- state.f.close();4 A# B1 T$ ~0 ]0 [8 l! Y7 c1 `
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( f+ o; {4 A# U9 J- function setComp(g, value) {9 s$ d5 L9 d# M' t) F( O6 h
- g.setComposite(AlphaComposite.SrcOver.derive(value));6 P* j1 [1 m7 u2 S K6 o
- }
复制代码 ' ?) J) R9 P2 }+ i* X2 H
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 O- w; ~2 g$ ^8 u4 ~
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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)# X$ ^0 f9 ~% ^- V0 c( g
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