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: u, Y* z% a0 D) a l" p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。
) D) o' j2 [" u/ x- importPackage (java.lang);
& _: j9 c; [" b- r- s - importPackage (java.awt);& B) _/ y$ j A. T
: d7 N& K V2 T( e! P- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 g$ X& p% w5 f: z) \ R+ m
- 7 p: v7 i8 E5 y* p, [4 m
- function getW(str, font) {, q! f2 A* v# T9 O( p ?
- let frc = Resources.getFontRenderContext();
' Y9 n! l+ W0 `2 N( |3 T - bounds = font.getStringBounds(str, frc);
* v) O9 P- R: \: q& F/ j& o# X - return Math.ceil(bounds.getWidth());
3 n P0 q1 j# K - }
. v7 a6 }, l! z4 @ - ' f- J2 j. X" _) t, T, J
- da = (g) => {//底图绘制3 R; p- D$ I* @- n5 ]2 D
- g.setColor(Color.BLACK);) W$ v% e) K. {( y0 b
- g.fillRect(0, 0, 400, 400);! O" R+ t5 ? d3 a
- }! }. ~3 Q) x$ ?
' J3 p+ s- p6 }! G9 t+ u- H9 k- db = (g) => {//上层绘制
! w1 D7 \+ u3 q1 W+ ~) v; L( W) M - g.setColor(Color.WHITE);0 R- K9 V1 |; y' v: ?/ w+ R
- g.fillRect(0, 0, 400, 400);
& j4 h! m4 J# W5 ?7 q4 G - g.setColor(Color.RED);
9 {5 m$ `* W3 j" O; I# N6 { - g.setFont(font0);2 N' j1 i3 `9 i0 Z$ e' w8 j5 G
- let str = "晴纱是男娘";% t, y1 Y2 X8 K7 V: P& a
- let ww = 400;
- S1 s/ ^5 `& W* ]/ c - let w = getW(str, font0);
4 }2 A6 z( V/ N9 } - g.drawString(str, ww / 2 - w / 2, 200);
4 v) i, v% u8 I# G( ^: q# y" t' @ - }
h. D4 @* D4 ~5 z' ?* z8 \ - 6 `# y8 `1 p% Y
- const mat = new Matrices();
. ]; a8 f& w- h L1 X- `1 R - mat.translate(0, 0.5, 0);
1 Z/ @" ]1 o H3 H5 @( a& Q. |: g
- ?0 S9 c3 P' q' X- function create(ctx, state, entity) {, R G& N: ~3 p9 x- e' `9 y
- let info = {# c6 [" l, p9 p/ H$ F; g, l( y) s7 n
- ctx: ctx,
3 [6 S. _, q% g& ]) ]+ r - isTrain: false,9 g6 e$ F+ e( F0 K
- matrices: [mat],
% D; I0 G0 N7 [! a D. l$ v - texture: [400, 400],3 p5 M! O4 E* _9 u% u
- model: {# U9 ^, K& m& l( ~( ~
- renderType: "light",
5 w2 u( e" R8 l- m8 Z - size: [1, 1],
- L" L' F" D) c% O7 a" j) Y; M( | E( k - uvSize: [1, 1]
+ w. u. o( H% v Z3 c - }6 U. V. i, s" }1 E" J0 S
- }
' P# ~1 [5 w( A. w - let f = new Face(info);
/ p. c& w; L" r( c - state.f = f;
% u7 ?' T, ~' K% x6 P, a- r8 n - 9 C1 V- U' f! v- G3 u! a% Q3 x
- let t = f.texture;
4 N1 N: T- w8 z - let g = t.graphics;0 m$ H- q( Y" o4 n
- state.running = true;
0 X7 S5 k, k- A# p9 w. |8 x - let fps = 24;
# P* j& _% M% x" I/ A8 R/ p: | - da(g);//绘制底图
0 q4 u2 S+ U V" ]/ B! y6 ? - t.upload();
: x! h1 C( g+ n; d# S7 J9 O# h - let k = 0;
% G/ R& B5 X- t' s2 D - let ti = Date.now();
5 K; K2 h# l; F+ j, w. a - let rt = 0;
) J4 \- }8 ?7 J2 F& Y/ d' e- c - smooth = (k, v) => {// 平滑变化
6 K( s! l, {1 x/ q' | - if (v > k) return k;8 S2 d) g; \+ B
- if (k < 0) return 0;* @$ w4 i* @* Q+ c/ P' O/ F: s- @
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
( j* `' @$ R" A N( z& \1 K - }
( k5 V, @+ O' t6 B. f - run = () => {// 新线程. s/ H$ ~, y' ~; ~1 }- i
- let id = Thread.currentThread().getId();/ Z$ u0 w( }+ j) `1 q% K$ y
- print("Thread start:" + id);
3 k. T# h6 V# ]+ ?" }; G - while (state.running) {# g7 t9 V+ `- N5 Q
- try {
- r1 z: t; Q* E# h$ q7 J% Z$ w - k += (Date.now() - ti) / 1000 * 0.2;
+ ^ q: h3 O. F& z9 h9 A6 L - ti = Date.now();
- I* F7 a0 x% k1 b - if (k > 1.5) {: b9 S$ X9 c9 x7 I; L
- k = 0;
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- setComp(g, 1);
+ O5 M# I+ N/ k6 F3 }* ^" [: M - da(g);
1 G$ k3 t6 y2 `" `! `0 | - let kk = smooth(1, k);//平滑切换透明度
9 M$ B! t |& P' d' m - setComp(g, kk);. V, s% p( x( s ^$ `
- db(g);
; k- n8 @8 X9 i5 {, _. C4 | - t.upload();
7 Y. H. O" r5 u/ S9 P# o - ctx.setDebugInfo("rt" ,Date.now() - ti);
) d' X( x9 s1 D2 N* g8 X$ [ - ctx.setDebugInfo("k", k);
2 W2 [0 e' i. I Y, o - ctx.setDebugInfo("sm", kk);+ d3 R$ c8 n! ~
- rt = Date.now() - ti;; e1 J; X) C# t% R0 {
- Thread.sleep(ck(rt - 1000 / fps));: |& Q) M0 U5 p) A/ U+ m; `1 O9 D
- ctx.setDebugInfo("error", 0)3 e7 q9 E5 ]3 f
- } catch (e) {
& d. V9 U L/ l6 k - ctx.setDebugInfo("error", e);
6 Y% j% V; p5 a; P7 f y# Z - }
0 X" R/ ^3 ~- k% h1 x# N - }
- ^8 f! W& i7 J - print("Thread end:" + id);
" T5 p* G' i; E9 i - }
/ @0 b4 Y; i; c# ~$ i' D - let th = new Thread(run, "qiehuan");: Z$ j9 J. t5 K' k
- th.start();
/ R0 |. A0 j% K: g5 g5 X- s - }
$ S( q. z" q0 M4 o% O% v - , a1 u) A& W4 b6 }( g0 O' C6 t. [
- function render(ctx, state, entity) {/ h5 y4 a0 w( U4 J
- state.f.tick();! m' l$ f! i# B! ?# L& ]7 ~2 z
- }& T9 u) G$ @4 ?
- 3 F) V, z" J7 E8 S
- function dispose(ctx, state, entity) {, {/ x! a/ D% @
- print("Dispose");
2 Y; c& c2 F- C) s |) y8 f - state.running = false;
- `0 {3 X+ N3 }9 `2 |1 _ - state.f.close();
6 N7 H+ W5 \4 G4 N# R" }- C - }
# S' X* `+ |8 @! X# W6 S
" i9 P5 j. ]( o- function setComp(g, value) {
* H7 r: l2 r5 \; w! p: c - g.setComposite(AlphaComposite.SrcOver.derive(value));
7 U& R; ^8 @. Z. ^ - }
复制代码
! o" r' c0 b# J3 [0 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。6 E) Z, |+ t' H& Z5 V. y# K
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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)8 r* y8 c6 l& v* G, K% F
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