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( k O0 U; E# v" U( K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 L/ Q; U( I6 e. W* }3 h
- importPackage (java.lang);8 R' I6 m' g) n; [' X
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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! [" N# r( ?2 M' F: o- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' C" C1 i. B) o4 j( A3 h) ~- A
& N" ^& `; \" d8 G- function getW(str, font) {
% L7 \; M! a$ m; r9 o! [0 [2 H - let frc = Resources.getFontRenderContext();% }0 w5 o+ X: t3 W: j. d
- bounds = font.getStringBounds(str, frc);; H# J3 s3 w9 d& a
- return Math.ceil(bounds.getWidth());! I0 o& @) h5 K* `! s8 |
- }
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2 b6 c r7 K" O) v, e- da = (g) => {//底图绘制
7 w: p% m, c5 G0 p4 D& P% l - g.setColor(Color.BLACK);
2 l; M. e$ q+ O7 k0 ~- ~! t( R - g.fillRect(0, 0, 400, 400);- W) b; p9 P& V, m3 O: t# c7 U
- }
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- db = (g) => {//上层绘制 M8 {6 V" \3 T$ L
- g.setColor(Color.WHITE);0 ^2 z2 v0 r) f D, b
- g.fillRect(0, 0, 400, 400);
' d9 Z) ^8 S! S - g.setColor(Color.RED);
4 a+ `$ C1 i) P - g.setFont(font0);
2 n$ e/ \ C0 A6 m3 D, f - let str = "晴纱是男娘";' X4 p2 k! u* f
- let ww = 400;
* z' ?/ c" `7 k - let w = getW(str, font0);
$ E" L9 O T7 C1 U - g.drawString(str, ww / 2 - w / 2, 200);8 @" [: o4 d4 ^* T7 |: Z
- }
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- const mat = new Matrices();' r) w9 h* v, {% q2 K3 A; b( u7 b
- mat.translate(0, 0.5, 0);
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4 q# B: C; b- D5 u0 a. O1 u- function create(ctx, state, entity) {2 F( B9 _. D2 r/ {0 D3 Z
- let info = {
- h, E, y7 w0 d6 [$ e - ctx: ctx,
1 ^" b7 N2 {7 U6 X V - isTrain: false,9 u6 E% e% N- ?1 q# _, s
- matrices: [mat],
8 B' \* c, g+ ]: j% h - texture: [400, 400],. J* D( i' C: u; Z$ X
- model: {% p5 ]1 }$ M1 r- ]# V4 s
- renderType: "light",& g! l2 A) @9 M! A
- size: [1, 1],
* D/ N1 ^+ ~5 x/ e - uvSize: [1, 1]
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- }
( ?( b* V+ H7 t3 L- ` - let f = new Face(info);/ W/ C" J+ C" \0 l
- state.f = f;
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- let t = f.texture;& d3 @1 V1 ]9 i+ O# D: Z! Y- k
- let g = t.graphics;! U# j7 F; w& ^
- state.running = true;4 I6 W# U! @ q3 n! K0 {* _7 C
- let fps = 24;7 m) n; v. y" E3 d- R
- da(g);//绘制底图$ L- ~6 M( Z; E1 E P
- t.upload();
3 I. \7 F3 N# M. m+ X - let k = 0;2 y t; Z; R% [
- let ti = Date.now();
2 ~8 o X1 H( A7 l8 ~ - let rt = 0;
5 e0 y8 ]) q& ~$ z6 l7 t; d - smooth = (k, v) => {// 平滑变化
) ^1 c1 T+ x6 }7 U - if (v > k) return k;: ^$ o8 q. }+ b1 q3 e0 G
- if (k < 0) return 0;
4 p b* y1 z V6 f% i - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k; j3 X1 m1 K- B: P; E) p
- }, I- l. p% [) p7 C4 V
- run = () => {// 新线程
. }0 w' ^7 O1 }% u" C - let id = Thread.currentThread().getId();
/ G$ i- O9 [% Z7 f: b8 G9 B; v - print("Thread start:" + id);
2 Q, `1 J) g2 `: { - while (state.running) {
) ]% X3 T6 l. g0 a- B - try {; |* ?0 }0 i/ z0 P3 j: v% M4 x
- k += (Date.now() - ti) / 1000 * 0.2;
( g: |0 ^" W0 I4 x - ti = Date.now();
& b7 q9 ^3 b- {. Y: H. d6 o& t - if (k > 1.5) {
& A3 _( A7 v2 V! R - k = 0;. p6 C$ E- \+ N1 [5 D( F
- }' X$ E: I1 Y7 B- D
- setComp(g, 1);8 ` W7 Y6 o2 S) P& |1 U! U
- da(g);, o3 R4 `, L$ O V1 \& O3 e- o
- let kk = smooth(1, k);//平滑切换透明度
& q* _6 _& P }( j/ M: ]2 C7 x - setComp(g, kk);$ f# L$ O% R( V
- db(g);) ?- G! T' ^# m
- t.upload();3 i* E3 P, w$ i( [9 D' K6 \& Q) E; U
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 V. A2 e; G3 |3 M5 N
- ctx.setDebugInfo("k", k);/ M/ A m6 I: m7 D& Z
- ctx.setDebugInfo("sm", kk);
) t: e" d& z; h/ M' E) M( { - rt = Date.now() - ti;5 h, q! n/ j' O7 Y1 j7 b" F! h
- Thread.sleep(ck(rt - 1000 / fps));
% [6 y, A- J5 R0 c+ h( X& @- n4 w - ctx.setDebugInfo("error", 0) ?) B8 Q% H; h
- } catch (e) {0 G4 `) P1 H! |4 K8 ~
- ctx.setDebugInfo("error", e);2 [/ Y! {. X) P0 j' b8 V
- }
; o9 y9 {0 y0 O3 B7 w) Z4 w+ L - }
& I7 i, n% S. h, N: @; a0 V! Y - print("Thread end:" + id);
/ O' E1 ^& L5 U - }
r% C* a7 F- `" g& O/ u0 I - let th = new Thread(run, "qiehuan");: v3 p6 G" Q0 h5 Y
- th.start();
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# ], F( h; ^, T$ `& e- function render(ctx, state, entity) {
( F( V$ o! v1 @9 U m - state.f.tick();5 [1 B# o* _) x. M/ O6 Z* u
- }
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- function dispose(ctx, state, entity) {, A* a5 ?& g2 i3 F! W4 F2 ?# r0 e7 ^) ~
- print("Dispose");9 d( l# x9 D h: t d3 h
- state.running = false;/ N+ a# j$ `3 j q0 H
- state.f.close();+ u6 V/ a8 n/ I" D S
- }3 f4 E6 X& y8 u8 v9 H8 c
- 0 d2 T m: ]! _2 m" j) t0 e8 B
- function setComp(g, value) {
* G' V8 c5 [9 h: R4 ^- u. Q0 m - g.setComposite(AlphaComposite.SrcOver.derive(value));
0 o0 B1 {8 o) d) N* a0 G* }4 y; M - }
复制代码
9 a1 x5 j* _0 ?" a- @+ |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。
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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)' ?# q" o& ~( p8 V
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