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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。
9 t! ]# H( t3 Z/ o& J- H- importPackage (java.lang);
% x% B% Z( u$ B, V1 C - importPackage (java.awt);3 j% a G8 F; ^( `$ H: b" ?/ T
* h- I2 f: w X* c& i8 o$ E- include(Resources.id("mtrsteamloco:library/code/face.js"));) f3 j6 [2 W; t, K3 }7 _
6 J2 }1 n- s* ~# G- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
u2 ?5 h3 v) l" ^/ P3 Q - let frc = Resources.getFontRenderContext();% q% L) S+ c" H) A/ I( d! ^2 ^3 F2 b( s
- bounds = font.getStringBounds(str, frc);; ]! _. k" I' p1 j9 ]0 |
- return Math.ceil(bounds.getWidth());
. W) j0 F7 M1 C' [+ ? - }
; L7 `3 J; v+ \' ^
. ^% u! X$ @2 T- S. {6 }" c7 O' }5 z- da = (g) => {//底图绘制
' R# W% @' H4 u' M* V) U - g.setColor(Color.BLACK);$ K* X) K( \% I( p' M6 H1 k
- g.fillRect(0, 0, 400, 400);
* v2 h6 \% j: ~( r$ g9 r" M - }
h- J* L3 P/ _) ?! \
& o _. l! a5 B; q) _- db = (g) => {//上层绘制; v- [% S% i4 T7 R3 N2 ~* L
- g.setColor(Color.WHITE);# E: ^% p/ F; a' `2 ~( _% u
- g.fillRect(0, 0, 400, 400);
( C2 E) Y. L: ?5 M& I - g.setColor(Color.RED);
9 T& O# k7 l# ? - g.setFont(font0);) C! } o. @& u- B8 B8 ~7 i* z. Y. x
- let str = "晴纱是男娘";2 @' I" q5 b& T a( ?
- let ww = 400;8 B9 r {( I" H* s+ H
- let w = getW(str, font0);3 _% N8 i7 C- r# `! O$ _' Z' p
- g.drawString(str, ww / 2 - w / 2, 200);9 l) Z2 C# V# k# \
- }$ z4 a$ Q5 r/ i4 Q8 l2 }
9 v* v' b8 _3 I: B3 P* @- const mat = new Matrices();
$ Y- k1 }" V5 J' _ Y" Z - mat.translate(0, 0.5, 0);6 I" M# {- c, l2 l! y% Y: f
) u0 f4 b1 i2 \, n- function create(ctx, state, entity) {
; b1 g) T6 H" K - let info = {+ ^+ g, V1 L" C; S( `
- ctx: ctx,
# }0 d; g1 E9 m7 D( m# Z( } - isTrain: false,$ v9 y& u' V, p, @; `, }5 T
- matrices: [mat],
0 }2 u1 f2 _( ]. v- Q# b - texture: [400, 400],( o* M; i, p( \# ~0 K
- model: {
# k+ \+ O* n0 p1 s6 e - renderType: "light",
+ E! p7 Z0 c0 U8 H7 E; }8 r - size: [1, 1],
& C/ b @1 V* s* T9 M6 u( M2 ~ - uvSize: [1, 1]* m: @* j/ ~- M+ d: o ^
- }* l0 C/ ^/ W" [+ B
- }$ j W' z6 ~1 X9 b) M
- let f = new Face(info);3 j1 W( t' v3 o6 u
- state.f = f;
# Y% }6 ?. k) S6 \6 S
9 y9 [! ^; X8 l( f6 {% {, G- let t = f.texture;
' L9 S/ m, A- X. L! U - let g = t.graphics; b# G) g0 d7 i( g- z
- state.running = true;
- D; V+ t8 X" J6 b$ C& o' G& G - let fps = 24;
/ g1 p+ V. v# K. m! }" C9 U - da(g);//绘制底图
; I0 l, b- O2 Q7 W - t.upload();
+ T0 P1 n# \2 }# B - let k = 0;
I2 V+ `. V5 c% ]( C( U; @2 q+ G - let ti = Date.now();
6 u% r4 q* m' H3 u2 e - let rt = 0;
' m+ Z+ Q* S2 [' P - smooth = (k, v) => {// 平滑变化7 |% w# r% T0 ?' d0 k
- if (v > k) return k;3 [ }% m. k* v _2 O
- if (k < 0) return 0;4 o: T" K3 z1 ]0 U
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. G& J+ W7 P3 O& |) v6 I
- }
3 r: K) ^4 i* H - run = () => {// 新线程
- w7 u4 Q- o) m: } - let id = Thread.currentThread().getId();% B$ i7 w1 B3 E
- print("Thread start:" + id);
# I. U) h% o2 H$ ~ - while (state.running) {
1 _2 T6 X" e: h( U- d - try {- o0 G) V9 F: C& p& k; R" C Y
- k += (Date.now() - ti) / 1000 * 0.2;
7 ]& Z$ e3 U0 e6 q% \" e. P - ti = Date.now();7 V6 `, L( _9 `$ I V. a* I+ {# H
- if (k > 1.5) {
8 M N5 ~. [8 s7 r( W - k = 0;- J+ u; r1 M" D% _3 K7 a8 o
- }
" l' a" j9 i! P h - setComp(g, 1);; c( A* c! Y9 `5 R8 b
- da(g);! {2 K9 x: H9 ^% Z/ I
- let kk = smooth(1, k);//平滑切换透明度
& v. f1 @" t8 y3 L: j& F, D - setComp(g, kk);( U" w7 `1 C) `# ?( J# N
- db(g);
) y6 t6 S2 Q: E3 ^( _3 f - t.upload();! i6 S7 H; _; Y
- ctx.setDebugInfo("rt" ,Date.now() - ti);2 U$ L8 x4 e4 g# h2 N) H3 @& k
- ctx.setDebugInfo("k", k);
$ o4 _! s4 j O5 u - ctx.setDebugInfo("sm", kk);' D( w3 l2 g6 v4 V" f5 a: [
- rt = Date.now() - ti;3 m' w( G. h* R3 v$ b
- Thread.sleep(ck(rt - 1000 / fps));; ^2 _ U# [, U
- ctx.setDebugInfo("error", 0)
7 [# J# }+ b" F6 Q1 T0 N6 w. T - } catch (e) {
" E7 u0 V4 i/ t1 i2 b - ctx.setDebugInfo("error", e);! Y) o! U2 i/ F4 e7 A- z
- }
; M6 K# s+ p& p% W* f7 _ - }/ t r' i3 Q2 D7 d& {" V+ y
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");. @) `6 P. u3 e' S. m" `* x
- th.start();% s6 K0 I& f3 h; L1 A! H& F" C5 z
- }7 ?; M. `/ J3 I4 a
1 M4 T4 l" ~ @- function render(ctx, state, entity) {
" E; h' k( a" K$ r - state.f.tick();; R9 p1 Q3 F' C# {; S
- }
1 T9 M1 @* ]( v* Q# r) p( M- w - 7 A7 ]* R4 q9 p" ?5 v1 w
- function dispose(ctx, state, entity) {3 r/ i7 C h0 v7 T3 ~: X
- print("Dispose");
: Y" L7 S; F7 N) t/ \2 Y& T - state.running = false;
4 K+ Y# V: e% V3 t - state.f.close();: F* k# G s5 G4 ]7 `; J c
- }% {( `; W O6 @6 n( i
- / s& B+ z1 g$ F$ E4 S: \% U
- function setComp(g, value) {' V0 a9 C$ _1 }6 j
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 r( \' r9 N- Y/ C+ t, ?
- }
复制代码 # Z, Q( J6 A8 ~% 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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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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