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4 f4 R! c/ c" Z' F$ W, X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。9 h3 V! V# P, E4 u) J& `
- importPackage (java.lang); {3 E& G" u/ M9 x# m* u
- importPackage (java.awt);
2 z1 Y5 T2 ^" f! R( D) Z" c - ) [- F5 J3 g) C+ N% K* S5 O
- include(Resources.id("mtrsteamloco:library/code/face.js"));& k2 q/ n6 \' A0 _8 X) C8 y7 H
- $ b8 V% Y9 } o2 I% E
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);5 U+ c8 r& F9 w
- ' b" g( R- R7 {5 x
- function getW(str, font) { K& k% ^8 ]5 Q) Z
- let frc = Resources.getFontRenderContext();
- ?6 {7 _, C: a) r/ j - bounds = font.getStringBounds(str, frc);2 [) g5 u8 `9 }" f1 G: l+ |
- return Math.ceil(bounds.getWidth());8 }2 [9 M( G" E3 U1 j* Q+ f& c% a
- }
9 z) q: ~6 G: t5 O1 @
: @4 O5 L0 H: J) Y- da = (g) => {//底图绘制5 ]# R3 A8 z N u8 }/ @ ?2 y
- g.setColor(Color.BLACK);
5 z* G5 R) t; ]* t( z4 q3 M - g.fillRect(0, 0, 400, 400);1 L4 ?2 w. @ ~# }; ^ u0 m
- }
" T) ]& }+ Q6 ]6 i: Y( g* f8 {
5 `2 p2 v" y- ~1 p# X; T" q2 R- db = (g) => {//上层绘制9 P7 N. x7 ^% H* T
- g.setColor(Color.WHITE);
$ S: p |# O' t0 D+ J( w& \6 ] - g.fillRect(0, 0, 400, 400);
+ o; B/ T" J# p; q% ?6 E+ ]: ^ - g.setColor(Color.RED);: ^0 z+ R" ^ i' M8 d. H* u9 w5 Z$ o
- g.setFont(font0);3 n8 k+ i/ _# ^4 p3 J8 i7 C6 [
- let str = "晴纱是男娘";
7 Z- { \7 C& K! \' \! h- M; d - let ww = 400;
9 A4 s. W# u* Y. O5 E4 P3 C5 D - let w = getW(str, font0);
5 e( z) E0 V, H3 f- Y. t* l - g.drawString(str, ww / 2 - w / 2, 200);
h! q) G/ S4 T `$ x - }
7 b8 K, c: C7 x5 H. y/ T- g
5 N1 s# x. [, M2 X7 [( W; f0 P- const mat = new Matrices();, f0 @$ [6 h( `8 ?7 B4 G
- mat.translate(0, 0.5, 0);" d" @2 j$ z$ q! j5 I: H7 j
/ i6 F( }: H9 k% Y3 U! a1 N* P9 c- function create(ctx, state, entity) {( v& T) G$ R0 B/ h0 v" U, W0 J
- let info = {
/ L% q( Q/ T H; @2 n% m - ctx: ctx,
. x! o+ d! N- z+ {4 \. v, }& ]6 y! N - isTrain: false,, }1 \8 i) D1 p# G+ J( k
- matrices: [mat],
+ L4 o! K- v- [ Z - texture: [400, 400],2 t9 v- ]( y, [6 T5 s$ _8 r" c
- model: {1 `) F0 B, J, b! x7 u
- renderType: "light",
; U) q. B, O3 a - size: [1, 1],$ i+ F+ k u8 g. Q* a4 M- e0 _
- uvSize: [1, 1]
4 x" z- o! Z% S, F - }
9 q/ o: E/ \' o - }
1 B1 A5 }: I' t/ W4 j - let f = new Face(info);
# P+ c( r% y. W2 |" v - state.f = f;- n( }% t# M7 H# Z& } Z
- `) \. W: F7 X$ Y- {
- let t = f.texture;
( ~( X; f7 n( n% l; ^ - let g = t.graphics;2 u% [4 E3 z( C2 L7 W5 p
- state.running = true;5 m/ p, @& h. u3 T& z; Q9 A E
- let fps = 24;% {0 Z& @0 B/ F0 Z# z4 A! w
- da(g);//绘制底图
1 n4 x3 }: g' P6 E - t.upload();; [5 V5 ?: l7 _5 M( [4 q
- let k = 0;
6 g7 _4 T8 L7 {7 j) w8 k - let ti = Date.now();
7 T+ \* e$ ~- q( n9 P - let rt = 0;
% Q1 L, Z2 v8 g3 r" q - smooth = (k, v) => {// 平滑变化
7 {- a5 Y+ o+ B, \* W) J6 X - if (v > k) return k;0 b% a4 V j2 ?- h0 f* d4 Y' K
- if (k < 0) return 0;# \- H/ B. z( h. t) |
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' l; S- f/ \ C9 t9 y+ l. Q$ Z - }' U% r& l6 M- _% @2 w; G
- run = () => {// 新线程3 Y9 H6 V9 F! I+ r# w
- let id = Thread.currentThread().getId();
7 ^! y+ p3 r4 \% @7 J - print("Thread start:" + id);
5 D8 J" s1 ^: f - while (state.running) {
/ W8 d1 q/ ^7 |; x+ p; @' P - try {. B6 j w& n. K& q- Q+ s
- k += (Date.now() - ti) / 1000 * 0.2;
2 |( k( r& O b" ^$ H/ x9 v - ti = Date.now();
2 @9 Q5 w) T. m5 W& Y - if (k > 1.5) {$ n/ n" u: h$ K7 l
- k = 0;& d( W# ~0 g% A8 H
- }
* @+ W; q3 h; S - setComp(g, 1);2 c% ^5 {8 g% _( ~2 }0 Y
- da(g);) O( {3 @/ B# x4 F0 ?
- let kk = smooth(1, k);//平滑切换透明度, u; f+ j4 h# P# i' N; E
- setComp(g, kk);
2 x" O( N- @1 M - db(g); {5 @# Q/ j6 l# T' F2 [
- t.upload();& s, M. \# q! m2 i
- ctx.setDebugInfo("rt" ,Date.now() - ti);5 G+ {6 O0 k3 e8 \# T' P
- ctx.setDebugInfo("k", k);' ?6 z. N) L K9 J( C* I
- ctx.setDebugInfo("sm", kk);
4 Q+ V/ O4 x: V( i, i% } - rt = Date.now() - ti;' c- U+ B: R. P1 K8 m% Y6 Q
- Thread.sleep(ck(rt - 1000 / fps));
/ [ b i+ D: E3 [, M, o7 a0 b - ctx.setDebugInfo("error", 0)
: z8 K( l- K; D% y9 w& M - } catch (e) {
; y! _6 w2 y% ~* C - ctx.setDebugInfo("error", e);
' U0 t# |9 W& i' y" n - }5 F8 ]9 z' \4 a; B7 f4 F) N1 P
- }8 ~) Z8 S1 j m- B9 ~/ q
- print("Thread end:" + id);
1 L. j9 d5 u# c" S a' E - }
2 D6 b v! d) y( q - let th = new Thread(run, "qiehuan");9 V5 K3 H* U- ?$ ~0 \2 r
- th.start();' X4 h, ~) T. X0 Q2 U
- }9 s3 U9 C. [& u" u6 M
; @- j0 S% Y1 O$ Y/ L# p$ U- function render(ctx, state, entity) {' B/ U- O' P5 U
- state.f.tick();9 c2 b% w7 s$ t2 t, B) }
- }
: D8 F H/ M3 H n4 o - 9 f8 ~8 ]( U# a3 R$ C7 ?. l& j
- function dispose(ctx, state, entity) {3 [" Z1 i' b s% @0 p- i5 V% ~. M
- print("Dispose");0 l! \" m+ B% o! C8 y: j
- state.running = false;9 [/ f- x- I! p: e& w
- state.f.close();5 z4 Z' `2 Y0 p5 P) J- P
- }
$ n. V* N, J( S, m" Q* l+ Z - + p" u9 e. Q8 t
- function setComp(g, value) {0 J# n' @& i# c0 t
- g.setComposite(AlphaComposite.SrcOver.derive(value));3 J- U# z8 Q) o& d/ n+ _' a: H' M
- }
复制代码 ; ~( E, ^0 v6 z% c: G0 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。, h( _' N' j P- `
* Q! [4 h1 H% ?& `
3 p8 Y+ M& @ x' k# A顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). F J6 M) j- Z
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