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2 s, r' [" E( h* c8 y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。( y, u+ i5 I! i& r" O
- importPackage (java.lang);
1 x4 d7 q5 R3 P$ `7 W! L# ?$ s - importPackage (java.awt);) s! d+ u# Y* @8 l( ]
- 3 r c# R0 W6 ^
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 f" z6 {- b B; l3 P
- 2 S, J" W* m5 N
- function getW(str, font) {
( b" R) p7 k" q( V7 R) k - let frc = Resources.getFontRenderContext();
' Z5 D1 w! E z! W/ T - bounds = font.getStringBounds(str, frc);
( F! r' L6 p8 R! J, H' L - return Math.ceil(bounds.getWidth());) A0 c9 H% }3 |1 f& D7 [
- }2 F0 j5 [) E( G8 }3 l7 p
- ( ]& x. t0 q% K. G
- da = (g) => {//底图绘制* z' z4 u' _4 ]1 q, b8 V: a9 j
- g.setColor(Color.BLACK);& p' r" ^2 u* j. j4 h
- g.fillRect(0, 0, 400, 400);
' p+ P/ A" z8 d& B, b2 e - }
: G6 k2 _ w+ h# u - ( \6 p7 b, N, g$ ]7 c. y% F" \
- db = (g) => {//上层绘制' @; z1 }9 |$ t) s" n
- g.setColor(Color.WHITE);
" a9 T; S: l& k4 w% w* O M4 R, s8 W - g.fillRect(0, 0, 400, 400);
^6 n1 M4 D5 l" w y - g.setColor(Color.RED);3 C6 h- e5 W w4 f, V& \
- g.setFont(font0);' d+ }& o m' u2 P6 I* w
- let str = "晴纱是男娘";
+ ~1 C2 q; O/ j' N% i - let ww = 400;3 ^7 f8 l5 o# q8 |7 D. Y5 P
- let w = getW(str, font0);
# X; Z$ i$ C! e8 ]9 T6 T) X. ? - g.drawString(str, ww / 2 - w / 2, 200);: I2 H, \6 i" N+ S; D* D: J! ~
- }5 _3 ]; C4 a4 |+ N6 B
" }* N, \- s2 U( X) B& a6 V- const mat = new Matrices();
9 d$ x0 @9 d2 P) {7 ?2 ~( u- X g - mat.translate(0, 0.5, 0);, E2 B5 O8 J; w, p# K/ }6 X1 q
& \! {; b2 g& h/ z$ D- function create(ctx, state, entity) {
7 N5 `1 v M, {" p) S4 P - let info = { v0 I5 L3 Q) N' y( u9 m) z2 I; \
- ctx: ctx,% J# }9 x# a2 k/ }- u' V
- isTrain: false,
6 W/ H6 z" c0 o0 x - matrices: [mat],3 ?3 b- e8 Z& U! q7 v& m% z. N
- texture: [400, 400],' G1 R8 `8 V* P/ a- p2 v: W5 m' o
- model: {9 E) x- W7 K2 j/ a m p6 V# ?
- renderType: "light",
! g" v/ A" C5 R2 T. Y2 @ - size: [1, 1],) i1 g5 k" F3 n1 f
- uvSize: [1, 1]
7 |' ~1 p) d) }+ | Y" ] - }
- Z# i2 t$ v/ B; ] - }
) L; j$ r, R3 G& n- K( v" \# ? - let f = new Face(info);
; M0 t7 U4 J0 o Z3 a& G5 I - state.f = f;
* Z0 j/ x* \8 o - 7 v3 c! x9 f2 g: F1 _' @
- let t = f.texture;" A/ k: d" f+ L" Y+ n7 }
- let g = t.graphics;
9 x5 m+ a7 C+ W6 i! r6 M1 M$ Q9 Q - state.running = true;
8 ^: \! W5 {! { - let fps = 24;" l( x! ^6 i! V6 c# \
- da(g);//绘制底图+ c2 n% s( P [) h, B) ]7 v; ]4 _0 B
- t.upload();
5 U. I, f" }5 c+ e; X - let k = 0;) \& g8 m- n. V1 v7 C* x, V' _( e) K
- let ti = Date.now();
7 X* f! U K* Y3 J6 ?( E - let rt = 0;
0 E* |( I. _% H! s* b, m |2 Q0 C - smooth = (k, v) => {// 平滑变化. k% Q0 J: x$ }; I# s( W
- if (v > k) return k;
7 g3 ^! N) k7 z- B - if (k < 0) return 0;
" q7 p4 @, ?. j3 F6 m - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 f3 ]- f# M0 ]1 ^ - }
6 y& i9 k5 W& S2 D6 l6 f6 R* I - run = () => {// 新线程
7 f2 y$ D' \2 P% y - let id = Thread.currentThread().getId();; c9 A p% V% K, H7 y
- print("Thread start:" + id);
2 ]3 Y- x$ k4 s - while (state.running) {
4 @7 v4 t% A/ a9 r8 N - try {
1 o$ y* e3 ~) C: C8 J - k += (Date.now() - ti) / 1000 * 0.2;2 e$ a' w1 j7 i# |: H) c
- ti = Date.now();) c! Z( T5 q. b
- if (k > 1.5) {6 S8 q. n9 h4 m; M6 C4 d2 w6 K- f
- k = 0;
" `3 w8 R- j4 F6 } - }$ L" H2 N- @. h2 c' p
- setComp(g, 1);4 A( N9 V; H; _/ e: q7 }
- da(g);
+ S- P4 O& p, g+ k - let kk = smooth(1, k);//平滑切换透明度
9 Q; ~6 i* e; v) q" ] - setComp(g, kk);
7 `: t9 J ^2 R, o- L- ]2 B - db(g);( Z5 Q1 F6 X. o
- t.upload();/ J" K1 w! g: D: S- f8 F3 n
- ctx.setDebugInfo("rt" ,Date.now() - ti);
- }) y+ @1 b' G3 B - ctx.setDebugInfo("k", k);
: B1 D. Z! o+ g1 @ - ctx.setDebugInfo("sm", kk);4 O4 ^5 Q9 U0 e4 t* k) A
- rt = Date.now() - ti;
8 w; X- V2 Y( e( u3 ?0 r - Thread.sleep(ck(rt - 1000 / fps));: l" D+ ]7 @$ K& E! u" k8 e# ^
- ctx.setDebugInfo("error", 0)8 G) z9 Z$ U8 C
- } catch (e) {1 I( q' T+ y6 q7 [
- ctx.setDebugInfo("error", e);
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- }9 v3 O$ R0 q$ l" t9 Y
- print("Thread end:" + id);# g* G& T6 g& {
- }8 Y9 F5 O+ b; i' _. U
- let th = new Thread(run, "qiehuan");
# C- M1 f) r! m( F; x h, U - th.start();5 }) W L+ L. }
- }3 @$ i' y2 N# m$ [: T( R
2 I' z8 l9 [) }& N2 K- function render(ctx, state, entity) {
* G2 B1 P6 b; |1 h9 Y: y - state.f.tick();
( ~) N2 c9 _" c/ Y7 p$ Z - }
! h! s" u; n3 ] - 7 U, d X( _9 Q* `3 h- [
- function dispose(ctx, state, entity) {# k% p8 S, Z7 F5 r( @
- print("Dispose");/ g6 ?4 n. h3 Y$ S
- state.running = false;
' y$ c# M' r0 ^7 R - state.f.close();
% ~6 R, m! y W; F t+ }9 B! S - }" v' e; V7 k; [' w, w7 f5 x
- " r- S- o) b' ~6 z+ a
- function setComp(g, value) {# _7 }& K' ?( Y" L
- g.setComposite(AlphaComposite.SrcOver.derive(value));% o7 O' d; h, l% n8 y/ m
- }
复制代码 k, j0 i! v* F0 i0 ~/ Q w" e
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。; {! C1 m9 O& z0 v/ l+ M
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2 `. V! e$ u: y
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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