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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。
: Q1 W8 y5 Z. T" x: P- importPackage (java.lang);
3 a- o5 a$ V" e4 `( |4 G - importPackage (java.awt);# l$ ^" r- M% j A# T i5 Y7 Y. L
- ( R# _6 u$ m2 Q# _
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' [0 q; L& |" Y; I! V1 J; `
- H. k9 ]8 N; S# Q& x; ^7 E- function getW(str, font) {. s, y, d- @/ j5 T, }! B
- let frc = Resources.getFontRenderContext();
, S9 e4 j0 u8 Z( a - bounds = font.getStringBounds(str, frc);8 @- ~2 T; C3 @; I* p0 O5 s
- return Math.ceil(bounds.getWidth());. Z% T; v( x! h U
- }+ ]! J6 n2 S }2 y8 U* ~
+ t) v/ Q- K( @- da = (g) => {//底图绘制
# }5 N0 ^; l# j- r/ j- x - g.setColor(Color.BLACK);% Z. p: K4 n' E8 I' g; Q/ t/ w
- g.fillRect(0, 0, 400, 400);) x) H: G, n% y) s, J$ |: d
- }4 t4 c# a: E3 W6 v4 I
) g, A0 ]2 \% I7 l/ D- db = (g) => {//上层绘制
+ W2 s" x& a" d. V+ K0 z, C - g.setColor(Color.WHITE);
1 i! X! S" L& T$ r- L% ] - g.fillRect(0, 0, 400, 400);. C* i. z0 Y: O7 t# w; R$ U
- g.setColor(Color.RED);
1 ^5 X1 Q* Z7 t i$ V/ G - g.setFont(font0);
+ o' w4 i9 w" I/ ?/ g3 a, u8 d - let str = "晴纱是男娘";& t) B0 l* e% u
- let ww = 400;
6 Y7 p& c+ I' R& V - let w = getW(str, font0);
: w! x2 j& A+ T: Z1 L - g.drawString(str, ww / 2 - w / 2, 200);
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( \- i& k/ ^7 v+ D2 L- const mat = new Matrices();" q$ E7 v8 ~$ X
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {- ~# p! |+ K, V
- let info = {% O% P/ j4 t( W2 K0 [
- ctx: ctx,
n0 v6 u4 p5 V8 d - isTrain: false,
( z2 m& T# Y0 I3 d/ C1 o - matrices: [mat],
) K% P/ c, ^& r2 x - texture: [400, 400],
, ~" G0 w7 j# b" O1 d- H - model: {4 `9 G& \* b5 R8 q1 i2 C: f3 i
- renderType: "light",' f% l7 T' T' M9 U- ?; L6 K
- size: [1, 1],4 R. N, [- H3 [# k* t5 E, v
- uvSize: [1, 1]* J, P5 p) l v0 F0 p/ `
- }
) x- ?1 i' o3 m - }
( ?: w" ^5 h! O% W7 Z5 j l3 b! r - let f = new Face(info);; j( U& R$ S/ Q; B' o: b' }
- state.f = f;% y6 X; J5 S: ~! U
- . O. c/ s4 n! T" |- O* t- h
- let t = f.texture;
9 M3 v0 E! s. N( U - let g = t.graphics;
/ a6 U2 C; o4 f - state.running = true;
" w+ o' l. P+ K6 @% J - let fps = 24;; \* i0 h0 o4 `1 x
- da(g);//绘制底图6 J: z* o4 B& A
- t.upload();9 L# p2 X0 Z: l! s* J
- let k = 0;
$ ^6 C4 l+ M1 Q8 s# u - let ti = Date.now();
. \; I. G! i3 _. W7 R, L8 c - let rt = 0;/ d2 [/ I7 z2 H4 k9 D
- smooth = (k, v) => {// 平滑变化. T M7 A/ l; c( x3 n: a* i
- if (v > k) return k;
% X( Z/ N; l# {- Q8 e - if (k < 0) return 0;# T( [: ~8 \' Z# V! S
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;8 i' P' v8 K5 N& ]
- }8 a: l- a& i: q' o8 V2 r
- run = () => {// 新线程
) N0 a4 G% B/ u9 V" o/ Y - let id = Thread.currentThread().getId();
* g% z$ H7 T$ L, |' t2 Z - print("Thread start:" + id);
* p9 q; j# M4 M, [4 W) Q) U# m% e - while (state.running) {% x# d- J8 O* k S& a( M
- try {+ V; P% c; ~3 G. m. L
- k += (Date.now() - ti) / 1000 * 0.2;
( K# u; D @: E ~+ K% w - ti = Date.now();
( \ V- `8 a/ X9 D5 Q7 y6 f- z - if (k > 1.5) {4 [$ s: r' L4 n, Q; [' _+ s
- k = 0;% n) Y2 {, @0 a! j7 Y+ k# p/ E
- }1 }7 M3 y6 u7 o% C$ y# z5 ^; _
- setComp(g, 1);' l B$ \ P; W/ C
- da(g);( k: g* t/ }7 H V" @
- let kk = smooth(1, k);//平滑切换透明度* \- G5 U5 T4 c! J% F5 U z
- setComp(g, kk);
3 P' |' I. {6 R - db(g);
; A6 f& h+ V$ o; h - t.upload();; u0 {4 C- E: @- {* c7 s4 x5 X6 k
- ctx.setDebugInfo("rt" ,Date.now() - ti); r& m7 l' [" w# R2 j* H& X' v
- ctx.setDebugInfo("k", k);- N7 Q% o; l% D
- ctx.setDebugInfo("sm", kk);8 N! F; w8 k" {7 A }" I
- rt = Date.now() - ti;. T7 K0 d8 M" }! K8 C
- Thread.sleep(ck(rt - 1000 / fps));; D! U _5 ^ i: }
- ctx.setDebugInfo("error", 0)
* F& G6 s* n6 p: V - } catch (e) {
6 L: y( _$ B/ e/ ^5 w2 d: G - ctx.setDebugInfo("error", e);) t8 D& u0 k9 H/ G
- }
! s$ S, w. @! s5 ] - }5 S( }5 G" K( X, M8 f9 }
- print("Thread end:" + id);
: C+ G6 G+ Q% K' t - }
, F+ `) |1 f: e; L& z+ \& q% @ - let th = new Thread(run, "qiehuan");
: d4 u$ c2 j5 R& m; `+ g - th.start();
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( G# R2 E1 P) M6 L% j- function render(ctx, state, entity) {; g* Q: P3 t$ \& M! P
- state.f.tick();
! T( X) T0 F9 T7 ?" _( b - }
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- function dispose(ctx, state, entity) {
9 f; j- m( f" x3 T - print("Dispose");3 ?% t) l9 i3 |
- state.running = false;/ t( J7 Z/ d0 l# G1 Q
- state.f.close();' l& c( k( Y6 {
- }- L/ n- Z9 @8 e8 K% y- g; y
5 {, j% s' H7 {; z: o" b \+ k7 y- function setComp(g, value) {
! a& Y1 e6 R" Y( U, r( M( @$ O - g.setComposite(AlphaComposite.SrcOver.derive(value));
$ Q2 g* ? _( Y2 V" h7 n( ^. f - }
复制代码
% ~* K6 f2 ^8 E: J' l0 t! D* 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)
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