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( j+ a7 T `" J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。
& f: n+ t1 W* k, b- importPackage (java.lang);
3 `. m6 ^2 l! ?5 n& @4 l - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));& k- x) j% E; T6 \" O+ s
- & N) w3 g4 w7 m4 A+ A4 A- t7 G! z
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
" [- j' |0 k5 W* S" z3 ^9 T - % C4 ~3 b( f2 [4 {
- function getW(str, font) {
8 J" h4 n2 L5 V3 M7 i" \" N) X5 { - let frc = Resources.getFontRenderContext();
& d: R; J) J0 @2 W' p" M B - bounds = font.getStringBounds(str, frc);; Q; b$ K' D }
- return Math.ceil(bounds.getWidth());9 V7 {0 V: `- f v% j
- }
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9 w5 k0 }; k. R3 J' i- da = (g) => {//底图绘制- } u; a! V" I% Q% ]' j
- g.setColor(Color.BLACK);
2 R, [( Z; z1 O6 c& c# S - g.fillRect(0, 0, 400, 400);
' }& ` j! v7 D" ] - }; r' y: f6 G8 `( x4 J7 g7 W
- / d/ N6 L9 S$ r# Y% ?
- db = (g) => {//上层绘制
- _" P0 g/ B$ m9 G+ i ` - g.setColor(Color.WHITE);2 v ` z6 W+ D$ i
- g.fillRect(0, 0, 400, 400);/ o( q) Q7 r( v2 t3 s$ D/ J
- g.setColor(Color.RED);
/ B* X3 P. M+ R1 H( b7 \2 _ - g.setFont(font0);
+ ?+ k( h" m6 x) D% x - let str = "晴纱是男娘";
6 K" r/ f" o4 i% J8 r3 P+ E - let ww = 400;
: T9 x! k, y( g$ p - let w = getW(str, font0);
/ m# Y$ I/ n2 [0 n9 Y5 x+ O - g.drawString(str, ww / 2 - w / 2, 200);2 S; s7 M) u& k8 a6 c
- }3 A' {4 w. T0 w2 w2 k& ?
- ( U; X, J: G6 I( m: z
- const mat = new Matrices();! n# ?0 h, @) _, w
- mat.translate(0, 0.5, 0);4 |% t1 C% v4 L7 ^
, i8 }9 n# K' x! t0 p/ u4 ?- function create(ctx, state, entity) {
& {9 u0 k0 k( s: [: f# y - let info = {) A- ?$ {5 [; u" n. q* i
- ctx: ctx,/ \; q$ }& n; I5 o; b9 u
- isTrain: false,
4 X& a: e: M6 @2 ~+ o! W# k, B - matrices: [mat], ^+ h% W5 _8 B/ H. z; @
- texture: [400, 400],
! y- H: k( X$ f) k/ o - model: {
; a+ L( v1 U5 ^. v* n - renderType: "light",+ X2 j+ H9 _/ z& }/ l u, H+ t$ Q `
- size: [1, 1],
# M8 L2 c2 m$ f' ~ - uvSize: [1, 1]; g" \0 n! R' B7 ~) T! v! z
- }
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- let f = new Face(info);' }* d% A, l) N4 t
- state.f = f;# c/ }& v/ e- [- y0 @
- + h$ e& V% q# `! v% D: d) l
- let t = f.texture;
7 A8 i" r# w5 I' P: Q - let g = t.graphics;
: ~* K) `6 `: a+ T; d - state.running = true;
& N- h6 L& i4 R, O, f I - let fps = 24;
2 u" u6 p) v" x/ L) l$ e - da(g);//绘制底图
$ I* `! D2 }* ?' m8 c7 G! A - t.upload();% N, ^0 i4 ]( p/ j) `' Z) b6 M
- let k = 0;% T. n/ G+ t* F1 p7 i; L) l
- let ti = Date.now();( l6 R# b% {2 B, v3 k5 s
- let rt = 0;. Y* E9 E |- M8 m) K. F9 M0 f% x
- smooth = (k, v) => {// 平滑变化
, c3 o) G8 d O/ z - if (v > k) return k;
8 u( _( ?# y5 s2 E k - if (k < 0) return 0;
T5 @, P7 U" U1 c - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" N [% {- C; B( ] - }* N: o- ~" g; {' t7 J6 i1 m: [
- run = () => {// 新线程8 d+ I6 d8 d# F# f8 R, T
- let id = Thread.currentThread().getId();
# v" B9 t# v: b8 ^* q. Q$ Y# j0 Y - print("Thread start:" + id);% B6 n4 V, E V- A/ A3 V/ @4 ^5 S+ t8 M
- while (state.running) {' g+ c' f* w) \
- try {6 s( q$ R s" x/ n4 K( X! S) i7 G
- k += (Date.now() - ti) / 1000 * 0.2;
) i$ I& V& Z0 v @* L/ G& D - ti = Date.now();
" `3 Y, s% e9 M( O7 R5 F; B1 m - if (k > 1.5) {2 u1 [% S2 Z/ t$ [/ F+ [% [
- k = 0;" d; ]6 ~7 e. E8 {. a; u: R
- }" s* t* }. U9 V5 q$ s8 ]5 {1 r' m: s
- setComp(g, 1);; L; K4 h' [; p2 |. ]8 }0 X
- da(g);& |( u2 G1 P% \) C
- let kk = smooth(1, k);//平滑切换透明度
L) O" u# q+ j' C: ^ - setComp(g, kk);
/ u1 d3 f2 _6 F7 A, Z. H, L @5 |, j - db(g);
7 @# l \7 @6 M - t.upload();
x# u( p" u& H2 q - ctx.setDebugInfo("rt" ,Date.now() - ti);# k2 p' l @6 t8 P0 q1 D1 |
- ctx.setDebugInfo("k", k);8 O6 P8 N( r Y$ Y+ l8 o! V
- ctx.setDebugInfo("sm", kk);7 k+ I& j; T5 J& m
- rt = Date.now() - ti;
! w7 Q- U8 p! Q8 S$ N - Thread.sleep(ck(rt - 1000 / fps));+ \. z3 @& Q2 p% q r; C4 `8 e( K
- ctx.setDebugInfo("error", 0)8 l' _5 g G7 M
- } catch (e) {8 l/ I6 K, N- _+ N. |/ T
- ctx.setDebugInfo("error", e);
/ `5 \, o" {2 f2 M9 M - }! |$ y: [4 |8 \6 k. A% s
- }( O) X& l9 y, I
- print("Thread end:" + id);. @& ?6 k6 V' a6 {% R% l, K
- }
4 C- H& L3 ~" {% V# ? - let th = new Thread(run, "qiehuan");' H1 v; B7 |4 x
- th.start();
5 B# k8 r# a! ]0 W: {+ }" v/ s0 k - }" g. s' o) N4 p$ d, j/ G# C6 j4 y
4 _$ m- Z2 T3 O e: T) | Q6 m- function render(ctx, state, entity) {
7 S9 B0 @3 o( N7 N - state.f.tick();" q" j2 x {6 B$ R
- }6 w5 J/ a! \9 }$ K0 `2 I9 R
8 l# P) b0 s! Y% ]- function dispose(ctx, state, entity) {
: t! Z" c! V5 R: W5 }! {8 h( S - print("Dispose");$ ^- U' g) ^ s. E& a/ I) W @
- state.running = false;
& L0 E. C& V9 B& `8 u: {2 r - state.f.close();
6 H3 e' O& V" s% J/ ^ - }
+ ~3 O/ [) D# A/ o l
; P* Y! I% I; ^/ G' |1 `0 P/ I! b- function setComp(g, value) {
8 d. e1 S5 N4 R% k - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 F" m; U l& g( J! @ - }
复制代码 9 V/ n( I' \/ p f! m' V
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。, G5 u( w8 b. ]0 |& C# W: D) t3 A
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3 r( M7 Q4 Y4 j" p4 |% n顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" c$ V6 Y1 c! B
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