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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。2 G# z i( h5 i- R
- importPackage (java.lang);- B4 v$ w* P+ @! N
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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' a: f/ c$ R- V$ z- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 I5 k+ S9 T! b, Z9 |
% Q$ y$ F2 e' Y. v2 w7 j- function getW(str, font) {
8 @0 l3 W* ~- n - let frc = Resources.getFontRenderContext();3 E9 q' J( S7 I% o% m; K2 C
- bounds = font.getStringBounds(str, frc);
- S3 a( \9 }1 g& q* L7 b - return Math.ceil(bounds.getWidth());
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, I m) p: v. S, w% z K- da = (g) => {//底图绘制% [: [; f- n: a
- g.setColor(Color.BLACK);
# t. A% F7 T' A - g.fillRect(0, 0, 400, 400);
7 z6 y: y! _, w) \6 L8 F - }
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! m- w$ F* s. ?+ p# b- db = (g) => {//上层绘制* x( l+ p# `2 s {+ N, q& ]8 w9 G
- g.setColor(Color.WHITE);8 m9 T7 m+ |! k/ t8 [, y! P0 H1 C
- g.fillRect(0, 0, 400, 400);
4 N2 k# d+ X, ]( x! F - g.setColor(Color.RED);) {" \; v; [5 o" m2 p/ ]& r
- g.setFont(font0);
1 k3 l0 W4 A# G, A3 h7 B1 h& R! c' S( h - let str = "晴纱是男娘";7 k+ j; F! v0 }0 T
- let ww = 400;
+ k" H+ Y: f9 L, q: ]5 `" ~) U - let w = getW(str, font0);
* e G7 P7 V" X; A; L6 `( j" V( X; s - g.drawString(str, ww / 2 - w / 2, 200);% \) R: E! s- R$ f' V* W
- }
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- w( b# z) j5 f- U6 ?/ z- const mat = new Matrices();
6 _+ F7 m# f3 i9 E- ^. Z - mat.translate(0, 0.5, 0);! P* A: p2 w" n- i
1 S7 H1 _- e# a, p- function create(ctx, state, entity) {6 g9 z2 F: v# M% k8 @; G& y& y
- let info = {
! d0 H& w B, n - ctx: ctx,
/ d- S9 t, e* _, L - isTrain: false,
% s3 G5 y) r. H- Q - matrices: [mat],3 n; S% E3 f) _
- texture: [400, 400],
( `" h& |9 c) D9 K/ S: v - model: {! g# |6 |! S" O# J( ?* U: Q
- renderType: "light",
/ G1 U. E- p/ ~% T$ V8 {8 E - size: [1, 1],
2 P" g7 w: v+ w8 i2 b5 Z$ V; M6 V - uvSize: [1, 1]
8 D) u" M D6 ^3 `4 s - }
) o0 q) O. a3 s0 r9 O2 H% T - }
: _: I) W- \; T+ R. X - let f = new Face(info);3 k( A, [( R+ o, m; s) g' M/ v# t
- state.f = f;
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* L" M9 c) J k+ f8 ]# l0 i- let t = f.texture;, i: q/ t1 y+ a6 B8 W) G4 _ w* ]
- let g = t.graphics;- Q4 d, z4 ]% \$ q+ s- Q% v
- state.running = true;
* w8 n& j' I! s6 \% ? - let fps = 24;, Z1 X' f0 E+ R% b
- da(g);//绘制底图, s* Q* l) q0 l+ n; \& [* W8 G# Y! ]
- t.upload();
1 m* ~! m4 Z% f) L6 }' l, N% H5 C - let k = 0;
& I% D- D3 Z' i$ S" q- z/ m - let ti = Date.now();
9 M. H2 u' U2 D3 U9 z6 V. K& [% ?# G - let rt = 0;
. D' f6 U) @1 B* J h - smooth = (k, v) => {// 平滑变化* g7 _5 W1 V5 R1 L
- if (v > k) return k;& X; g, S8 ^ T
- if (k < 0) return 0;7 R8 S2 ~- T, L! i+ a% U# E. t
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程! E i- H, T2 p9 I H4 a& w Z' M
- let id = Thread.currentThread().getId();( Q0 B) X9 n9 w1 X4 k3 Z
- print("Thread start:" + id);1 }. t5 Q! Z: M, |& y3 L
- while (state.running) {. m5 W/ e* p& Q9 J" Z
- try {1 ?; h# A1 U1 `- j: {2 ~
- k += (Date.now() - ti) / 1000 * 0.2;
* A0 I* Q. Q1 A" z& m* n - ti = Date.now();
4 U" d7 J- P Q7 P& v1 e - if (k > 1.5) {3 Z6 |) G+ e$ v! Z' [. w- M
- k = 0;
; p$ ~( s) O! Q# i, | - }
* B+ b: n5 | F% Q5 l/ t: [8 ]/ w, S' W - setComp(g, 1); s) E- x7 y) S6 K# @
- da(g);
+ K B! O! J% x% ?5 X$ o3 ^+ @ - let kk = smooth(1, k);//平滑切换透明度) S8 g& l) _+ a5 i
- setComp(g, kk);; g. r1 n" F' w% ?
- db(g);
* L7 g+ C* q/ y& z; M0 h$ C - t.upload();
, R9 v& j2 h* W: E8 U8 i - ctx.setDebugInfo("rt" ,Date.now() - ti);
* @5 C9 g$ Z% t$ v+ F - ctx.setDebugInfo("k", k);
% L/ T% t5 w8 W5 T: T6 m! p - ctx.setDebugInfo("sm", kk);5 e# D4 {! Z, E. V. r
- rt = Date.now() - ti;9 u' a! ]/ b# ~( ~" |
- Thread.sleep(ck(rt - 1000 / fps));8 @. V/ Q* \% @3 l/ I* G3 U
- ctx.setDebugInfo("error", 0); y3 L, _" [1 ~0 Y3 @8 `
- } catch (e) {
+ U! ~1 k( s$ F, H6 A2 U/ n7 C - ctx.setDebugInfo("error", e);
6 T: o1 \, A/ R* @ X+ Q% U( p - }
1 [0 B8 t1 x# D3 n - }
! e8 w* i: v' ?. ?( a- R" f Z" s4 Z - print("Thread end:" + id); T# a0 x" H$ L6 L' } a- j/ }
- }! C3 x9 e# y% m- l& n
- let th = new Thread(run, "qiehuan");6 ^; Z; P0 v/ M: E" A" s5 }& J
- th.start();
* |0 I7 {1 g* x6 I3 x1 O w - }
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- function render(ctx, state, entity) {
6 W. p+ C+ f# \/ o" h% y - state.f.tick();
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- * u9 \6 O$ h' e
- function dispose(ctx, state, entity) {, I1 S; ]/ Q0 |6 c
- print("Dispose");
. I" i( }7 @/ F; B% V) q6 ] - state.running = false;) e2 Q) G$ N+ I, W/ l
- state.f.close();3 D; B1 a- Z4 I, m3 m
- }
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- function setComp(g, value) {2 d1 S5 U5 w! t4 p! S$ H4 b
- g.setComposite(AlphaComposite.SrcOver.derive(value));" ?9 h6 Z) X! }: O+ V& G
- }
复制代码 k* m7 v+ `4 A5 I* i* S
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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% W' ~" L0 n: q- H4 q+ _/ R# y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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