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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。" O& J( E% n1 Z+ R+ _
- importPackage (java.lang);
; n9 a6 u2 E6 K8 M - importPackage (java.awt);
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- F8 s% F% f5 R' V- include(Resources.id("mtrsteamloco:library/code/face.js"));0 i* N9 I7 \! j( U
- & H6 B/ v: `) [; ^. k @
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
4 H' D3 n1 U- R* v% N' s6 { - let frc = Resources.getFontRenderContext();
8 X( ?3 i6 D3 N6 Y2 r& }; ^ - bounds = font.getStringBounds(str, frc);
5 J4 l) l- S: ~/ E" r - return Math.ceil(bounds.getWidth());
+ {1 s, B0 F0 E. Y, L6 L - }
- Q6 g2 p4 U; H( j9 A - , y, ]& S6 {9 F+ l9 P
- da = (g) => {//底图绘制2 x, j# _1 N, ?5 L
- g.setColor(Color.BLACK);8 f; N9 E: l* z( [% s: P
- g.fillRect(0, 0, 400, 400);" x! t9 Q: y4 g* ]1 O& b9 Z* N2 H
- }
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2 Z5 x7 r& \1 q: ^; t x3 G- db = (g) => {//上层绘制. m9 E3 [9 R/ }9 u" v
- g.setColor(Color.WHITE);& r8 ]+ P- z; V2 T3 A+ E- O0 w1 h3 O
- g.fillRect(0, 0, 400, 400);7 [% S2 n. l9 A* R) {
- g.setColor(Color.RED);
! N' [3 g w5 w7 Q$ D) Q% d3 X - g.setFont(font0);' G) `6 \/ S" U2 \- K& ]: l
- let str = "晴纱是男娘";
7 |# o7 e3 b" F+ o/ l; o - let ww = 400;
" C* z- e- \9 F: E' w9 L2 ]. A - let w = getW(str, font0);0 o4 O/ X3 B) t5 U, i
- g.drawString(str, ww / 2 - w / 2, 200);
) o- z$ D+ O, I: T; r9 p" _' f - }
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- const mat = new Matrices();
! S: b7 Q6 y; ]+ [ - mat.translate(0, 0.5, 0);
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+ c: l% @4 u' f4 r- function create(ctx, state, entity) {( u! S) N0 q6 r' |' {' X
- let info = {
( U O: H$ B' H$ U2 q - ctx: ctx,* ^- F2 t" A( o. A8 l# p! l8 ^
- isTrain: false,
* d: }, n* l- r% c' c - matrices: [mat],
1 a0 N" N# j8 N' g. e - texture: [400, 400],
& P( @- a7 R8 Z* H; I- O6 } - model: {+ T$ ^) F& Y1 @* H
- renderType: "light",
$ U5 H! n8 R: q3 F. o$ S4 H% t - size: [1, 1],
" j; C2 G7 \4 J. r6 Z - uvSize: [1, 1]
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- }( i. f x: C9 n1 x+ p v
- let f = new Face(info);# m) w, d* t( U, E; J
- state.f = f;2 |5 D& j' X9 p
0 L$ K" E3 e( `5 G3 g* }- let t = f.texture;( t. Z- N$ a* B1 d3 L E/ C
- let g = t.graphics;
8 Z: s7 j- I/ s: y$ @ - state.running = true;5 ]. M' }) j2 |3 D- b6 q+ N
- let fps = 24;+ s* Z$ Y" |! ?8 N! Z
- da(g);//绘制底图
3 P: R" H. |9 ?- Z+ T* h" ~ - t.upload();% }0 m' j$ G; ~5 `4 i. |
- let k = 0;6 K) t9 }% c7 b1 u1 F: Z
- let ti = Date.now();
% {* w/ N9 \/ V8 ?1 w( t - let rt = 0;
( f8 `2 b, X7 b. O O# }; [/ P - smooth = (k, v) => {// 平滑变化
% {- p0 d3 Y$ X - if (v > k) return k; |& X6 H0 `7 f# B
- if (k < 0) return 0;# u, O% ?) G) i7 C
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 t% u* D# ?/ O0 i
- }
+ Q7 O7 T( L& Z - run = () => {// 新线程
$ o2 V# \' ^2 l* o: R4 N$ R# j+ I/ _ - let id = Thread.currentThread().getId();
8 Y6 F0 R' A5 h9 J8 ~& R- j2 D - print("Thread start:" + id);& K/ {/ x$ T! Q9 r- T1 `
- while (state.running) {
- L! q8 ~# p) }: ?9 y$ v( T" A - try {, n$ e# I, B. X, l7 `5 g
- k += (Date.now() - ti) / 1000 * 0.2;
. d2 n; \% Z s. F - ti = Date.now();
5 [- m, S6 z' f, P8 R! U9 X - if (k > 1.5) {
% s' W2 r7 z2 f$ ^ - k = 0;
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- setComp(g, 1);1 ~# U, T0 o8 p7 |
- da(g);+ |/ t3 m F2 z& t
- let kk = smooth(1, k);//平滑切换透明度
V t, L6 P/ z; ~/ k* b& T - setComp(g, kk);
# C" R' u3 X3 w/ g# q8 P1 { - db(g); [0 M0 {% {9 O8 g: |6 e
- t.upload();
" b& ~- L! K7 B" `0 T+ N - ctx.setDebugInfo("rt" ,Date.now() - ti);
: d- `" ]0 G8 Q+ M - ctx.setDebugInfo("k", k);
8 h, @2 ` E9 g; y- E& x* s - ctx.setDebugInfo("sm", kk);
8 [7 G' A/ W& _, Q - rt = Date.now() - ti;
, i, A8 q3 |+ R/ Q: N i. G - Thread.sleep(ck(rt - 1000 / fps));9 t. F7 s! J8 m. |/ j; H
- ctx.setDebugInfo("error", 0)
! F }1 y" Z7 u+ J$ w* F' E& ] - } catch (e) {9 b: G7 [, g2 E3 b! K- i% T' t6 P* X
- ctx.setDebugInfo("error", e);
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- }! `% F g6 Y0 [% m3 N. ~, B/ P8 E
- print("Thread end:" + id);
4 z" z- R2 H3 h: _( X9 r3 R2 c% i - }
. a8 A7 B# T( r# r* [ - let th = new Thread(run, "qiehuan");
. l" E0 h! e# I3 s - th.start();8 f8 @+ v6 L4 t! p$ \1 V" v
- } A$ x# m) \3 N8 W9 X" |3 z3 D
- 4 K( c! s. X( N
- function render(ctx, state, entity) {
8 X7 [* u5 H" q+ O8 |2 } - state.f.tick();. ?, c3 P; T: ~- y6 L$ d
- }) s3 h; ^$ z& c X/ O, R V, {
- 5 E: b& W- q6 ^% V
- function dispose(ctx, state, entity) {
) l) P3 C' Q5 h2 F+ u2 Y! Y- Y! q - print("Dispose");
2 z( P! ~6 Q. y* [- I - state.running = false;2 R( j1 f; ?* @& f9 Q
- state.f.close();
+ N, U2 P2 P7 o) w7 a1 d" q - }
# f0 E4 @, C* [/ {
; O; o1 o) e# [( n6 @* {- function setComp(g, value) {
. Y% {$ j0 C# L4 |6 z/ X - g.setComposite(AlphaComposite.SrcOver.derive(value));
& f: a7 B0 T0 E - }
复制代码
) n- k" s1 ^4 A+ H$ 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。
8 a% G( `* B7 B1 n( i; W" @) U. @- M# \
* d. Z8 {+ `3 o1 W. F3 d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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