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" q: F1 c7 }4 r- `( ^1 U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。
2 R, e/ A7 J& ]- importPackage (java.lang);
3 P+ Y. ~0 }9 i9 K0 f/ I( I - importPackage (java.awt);8 n$ [5 Z7 F3 S: V7 e, E9 o, _3 U4 ^
- 6 `: e0 H$ k2 q
- include(Resources.id("mtrsteamloco:library/code/face.js"));( Q, Y0 I2 V) |- j; h: \ j$ ?
- # q: _. ]0 ^$ l! w3 o' G2 {- J
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* @4 T; n) t, @* y
/ m$ r) P2 i6 H( `; M- function getW(str, font) {8 x6 J! U* W( S; P6 a
- let frc = Resources.getFontRenderContext();$ f, G# r2 H, s' ?% u! @) @
- bounds = font.getStringBounds(str, frc);8 @* ]2 E$ m' g2 U' _" K- V
- return Math.ceil(bounds.getWidth());
( C( w4 X B1 @" @ - }
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8 O n% Z6 C" W9 ^* C5 }- da = (g) => {//底图绘制) ^, \+ z6 F& C8 l
- g.setColor(Color.BLACK);* X5 I1 D- j2 T2 F9 ]
- g.fillRect(0, 0, 400, 400);: ^. _$ j1 n, U; C0 p! Y
- }
; Q+ |2 u+ F& \# O) ~3 y - / M) A; b y& X: G$ y o: f+ H
- db = (g) => {//上层绘制
) m4 e; t. T$ A8 K - g.setColor(Color.WHITE);
2 V- t1 S( O0 d- } - g.fillRect(0, 0, 400, 400);0 T6 t6 [% r# g% R9 N; q a# j
- g.setColor(Color.RED);
! t2 k0 ~8 ?2 U& y* v - g.setFont(font0);: w8 ]7 t- \/ c% ^) E
- let str = "晴纱是男娘";5 A* {+ Z H% D; d2 d2 v! ?+ |
- let ww = 400;
& B$ z7 F7 J i3 S - let w = getW(str, font0);" `3 D# [& K6 O6 ?! c) G8 I
- g.drawString(str, ww / 2 - w / 2, 200);
; W8 [6 m, U8 r - }
# }/ T3 E) b/ b - ( l+ t1 v0 x/ E2 l, j w
- const mat = new Matrices();& w5 g8 M0 l/ ~$ \6 H# z
- mat.translate(0, 0.5, 0); `7 u9 {7 i- u" V
- 9 ?$ k g$ U. M+ J
- function create(ctx, state, entity) { x( c, y$ V' Z" ~2 Q) H
- let info = {9 X) v t a9 K' L+ i- e
- ctx: ctx,; X( h T& e- h
- isTrain: false,* `' T8 ?6 e K- c
- matrices: [mat],
2 b' u$ j* |3 a' o' } - texture: [400, 400],% ]- M; f# a" U4 A/ [5 @4 n Z# v
- model: {& a/ K6 v: X) h/ R0 `3 w
- renderType: "light",0 c3 c0 I+ f6 F# x! b3 u2 v
- size: [1, 1],
1 S: M3 P$ c5 B - uvSize: [1, 1]
& w8 F" [% b6 s K# K; |" a' O - }) R# @& E6 O$ t+ M* ]! I V
- }
9 S0 |6 S0 m" k* B4 T0 H, C - let f = new Face(info);; \4 i; K# S1 s/ o
- state.f = f;8 S0 a2 B9 `& U p
- + D& w' @+ P# Y. R$ A" g
- let t = f.texture;* z( T1 l' @- {
- let g = t.graphics;
; t: A- {* S/ ?% k$ Q6 ~5 H - state.running = true;
# v/ I* @$ |( p8 x& D! [ - let fps = 24;8 a9 O) f/ J+ Y5 d. \ N$ b
- da(g);//绘制底图3 Y. Y9 N( y- ]' K! p. O. O
- t.upload();" L7 g; h) i" Q9 U/ B; z( M( q
- let k = 0;
1 d- k" K" H# ^ - let ti = Date.now();' G, B, N2 b9 w& k
- let rt = 0; ?- p) s! H0 @( J# R. P8 A5 F4 v
- smooth = (k, v) => {// 平滑变化+ L3 x7 L5 C4 X4 d# X8 u, w5 W
- if (v > k) return k;
3 z- v( F9 H$ o$ F! o t. _+ g$ S - if (k < 0) return 0;+ E$ t6 z2 r1 i1 q. z; b& P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* r2 v# l) l& v8 b' }
- }
3 L- j( t% K4 r0 y+ }& T0 z - run = () => {// 新线程- B: I5 Q# `. X. K1 i$ U
- let id = Thread.currentThread().getId();0 U+ T; G: Z" y0 t3 Z# x
- print("Thread start:" + id);
) R9 T, D. @3 K: I4 k* {3 B - while (state.running) {% p7 B7 [1 _! q* }
- try {" T" a( x! N7 P
- k += (Date.now() - ti) / 1000 * 0.2;( i+ W2 C! P! Q# k! {2 c3 O
- ti = Date.now();
) i3 L, r7 A: H9 ~' {+ A - if (k > 1.5) {
# i2 h6 x5 s* R- N - k = 0;
' D b, A% b: g - }% F: u+ ~7 o9 E5 ^* n7 A' y
- setComp(g, 1);/ K9 X% j5 w! k! |
- da(g);
4 I/ t- l0 B7 S& B& N( F - let kk = smooth(1, k);//平滑切换透明度
w; O4 H9 ?) | R8 { - setComp(g, kk);
4 y7 L3 b5 R! P/ u" a9 t - db(g);
4 e% c% m0 ?: g" i3 ` - t.upload();
8 s4 L" ?! h1 g, v1 J% } - ctx.setDebugInfo("rt" ,Date.now() - ti);
9 b' Y7 p3 b4 x/ Z - ctx.setDebugInfo("k", k);
) y' w* n2 k+ A) | z - ctx.setDebugInfo("sm", kk);5 N2 ?' n$ s N- Z. ^- S
- rt = Date.now() - ti;
, u$ R' k7 a/ ~: e - Thread.sleep(ck(rt - 1000 / fps));2 R1 ~9 }' X0 P
- ctx.setDebugInfo("error", 0)
$ ^- \) D3 @4 ]% @: l& g, p - } catch (e) {
8 m* f5 j' E) V+ @2 K' Q7 l - ctx.setDebugInfo("error", e);
! r7 s& j' ?$ r6 Y - }2 C0 K4 q3 T8 `6 ^
- }3 k, y9 H) R6 [. U
- print("Thread end:" + id);
/ L/ [2 Z! Q1 F. [, x - }
4 ~" o' \; ?0 @1 K4 y4 I; s - let th = new Thread(run, "qiehuan");7 t1 g/ c: s" E8 I8 Z
- th.start();2 V; ~. O7 z* l, X2 K
- }
: E/ \4 c: z$ h% o1 M A( Y# h4 E2 Q) y
% v; t# T9 d3 d+ V* y- function render(ctx, state, entity) {* f" ]! _ e' [
- state.f.tick();( w+ A& [/ X: A f0 [
- }
4 Q F: @/ K7 j0 J4 k+ n3 k - + u( c# w) y [! r' x9 {1 G, D( h
- function dispose(ctx, state, entity) {
# L- |9 L0 G& J - print("Dispose");
# L- ]; C6 A% l n3 H0 |* M - state.running = false;
6 K" F$ J% u- B! ?1 \/ ^ - state.f.close();
+ H7 a# F4 |& I; ^6 z* m7 _: |/ \ - }7 p" Z* Y$ e; n) H* s: C7 V
- T& Y( G4 x$ s7 @: T# }! s$ j
- function setComp(g, value) {. B! V9 k" X5 E3 `
- g.setComposite(AlphaComposite.SrcOver.derive(value));1 c3 y) L* H. `8 f) H6 k: L
- }
复制代码
6 A7 T, O6 Y. G( C7 L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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4 P. A2 D( b! v1 |$ K2 ~) {顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)+ d0 b; V# q2 E5 K1 b2 b. {/ _
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