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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。
7 _- v2 C$ G- Y# ^6 ]$ T- importPackage (java.lang);; y7 z) a; ]3 A5 M+ c
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 _& H& F. b: a; z
- ) v2 d9 W. `: H4 P) m: d
- function getW(str, font) {
0 L& s- h* e" V# @/ \8 u - let frc = Resources.getFontRenderContext();, _2 d- n6 X+ B7 r+ x7 j- B# H: {
- bounds = font.getStringBounds(str, frc);3 a2 O9 s$ c+ H5 M& L7 E3 D
- return Math.ceil(bounds.getWidth());# d# Z: N. T7 n- u6 Z# G, J, @
- }' }3 h- O4 p6 L B4 t0 W
8 |2 b! B! o0 p3 v- da = (g) => {//底图绘制
& O# @/ s- A1 S8 t - g.setColor(Color.BLACK);% z0 `, y' T+ z8 p
- g.fillRect(0, 0, 400, 400);
' ^& w M, ?& r! A - }
$ [3 p9 k7 n1 p* l* F& E - 1 ~' j0 R% i( X4 A. i/ c0 B
- db = (g) => {//上层绘制
! O; P3 C/ z2 j# W3 B8 g - g.setColor(Color.WHITE);% t3 g+ ?6 y7 y% n) V
- g.fillRect(0, 0, 400, 400);( h% g3 b9 Z2 j, H% }3 O1 S1 w9 s
- g.setColor(Color.RED);5 \1 `6 H) R! w
- g.setFont(font0);5 x9 d! j0 y* v8 u) K. b) b
- let str = "晴纱是男娘";
7 a7 |. ^5 h$ F. R0 ` - let ww = 400;
: P% p3 Z0 @- H* f - let w = getW(str, font0);
0 [" M' Y6 }* N( P - g.drawString(str, ww / 2 - w / 2, 200);/ C; p- q0 I0 l! v9 r. N
- }
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1 ]; L) G T. w- r- const mat = new Matrices();
0 t7 o( U, K; K& d7 d" z: {* _ - mat.translate(0, 0.5, 0);3 M* G4 d2 U* D8 a
- 6 @( A* ]) L' W) |( y! x
- function create(ctx, state, entity) {8 w+ s; A j5 Q
- let info = {
( G3 d+ T2 `( s% @ - ctx: ctx,
( u# i- t! l9 _7 {1 Y - isTrain: false,
( n5 I5 Q* j% ^" j# A9 a; H - matrices: [mat],
" m( f/ U8 `- i8 U - texture: [400, 400],
( h, z* r5 [' U0 i8 V - model: {
/ _9 o# Y( {% c k Z - renderType: "light",
% G' O7 w8 Y$ P - size: [1, 1],, E' p' E' x9 p6 j$ W' C0 V
- uvSize: [1, 1]
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- }% j# m4 i4 f) U3 v- \% T/ c
- let f = new Face(info);8 _/ _& p) }9 k3 F- z; b+ b5 W
- state.f = f;0 v4 T) X9 D( Q4 N1 B, u8 H+ k+ E
4 o e4 c/ w- i! q- let t = f.texture;
0 C& Q3 C( f" S# M" B - let g = t.graphics;; {& I5 t8 [$ t2 G) R: Y- p; J. T
- state.running = true;3 f: a* c! S- y4 c7 O
- let fps = 24;
. w0 l7 y |' F$ V7 R - da(g);//绘制底图% a- l: e7 e: \/ _
- t.upload();( d @6 w' J+ G, c5 c
- let k = 0;9 { _: U( A5 T' w# \ i* I
- let ti = Date.now();( i" i1 N6 d6 F+ G5 h/ g" E
- let rt = 0;
* D; K+ _4 L! o# n+ B7 k( p2 H' J - smooth = (k, v) => {// 平滑变化
1 A4 Q0 x4 j, K# G; r5 ~ - if (v > k) return k;( N7 k* H u: y8 i/ R* w8 C. e" j
- if (k < 0) return 0;0 R: g# ~$ J6 E/ E0 r
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程9 _0 L! s0 j2 L
- let id = Thread.currentThread().getId();
6 U( O; P6 s9 q% y. K$ R# z - print("Thread start:" + id);
7 O3 g0 J; w' E7 W& a - while (state.running) {
% C' M' ?. x+ T$ Q5 V - try {
( q# J# p% l# f: F4 j7 A% y% ~ - k += (Date.now() - ti) / 1000 * 0.2;
7 o6 C5 ]( B3 E- @4 b1 Z, M7 Q- t - ti = Date.now();
* t6 x3 U X! z" h( [ - if (k > 1.5) {
- v! B3 v+ o' U+ M# I - k = 0;# o3 s r' V% v, g' X# l7 e! n& ?6 Z
- }
- ~2 L( h/ A# r7 s+ I, i$ N5 y! _ - setComp(g, 1);. X5 ?# z$ c; B; D% R' V2 ]
- da(g);
4 g8 F9 x7 ]! q n2 } - let kk = smooth(1, k);//平滑切换透明度& d4 @% R) ~# V0 a
- setComp(g, kk);
3 {, G6 F1 g [- K$ F - db(g);
' D1 y- {( V5 F; [9 y, S - t.upload();/ B! {$ X5 ]% A, Q( P
- ctx.setDebugInfo("rt" ,Date.now() - ti);
3 ^! D) m! D) m, O( L+ D; M - ctx.setDebugInfo("k", k);+ B) Y; H: f. [1 U4 |
- ctx.setDebugInfo("sm", kk);
: d. X. b/ H# T - rt = Date.now() - ti;
; f) _6 y+ Y I; R( T3 D2 w - Thread.sleep(ck(rt - 1000 / fps));
: b( [5 k! t2 a! Q2 A' I/ L - ctx.setDebugInfo("error", 0)
, C/ x. i! [* F1 h# O - } catch (e) {
9 O: \: _5 ^' L# M V - ctx.setDebugInfo("error", e);
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- }5 ^/ h1 }5 }/ i) \* w! N* N
- print("Thread end:" + id);9 `" G' ^+ R7 M) X! o4 f5 P3 j8 k
- }" E. u' s7 F& e+ |' ~
- let th = new Thread(run, "qiehuan");- ]" ]. j, n: Y) V
- th.start();
3 p7 p) \1 }$ u3 n1 H) H - }
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- function render(ctx, state, entity) {9 J+ @# N! i# {; p4 t
- state.f.tick();% c5 \+ O9 S; ^. p
- }. U+ _% Y. ?) Q3 c( b: U! S
+ q# f/ U1 I+ g5 |! o9 i* u; N- c- function dispose(ctx, state, entity) {
5 W/ J# h. ~; b% ~) m: q$ w - print("Dispose");
7 l; a# |* t4 P; o9 G$ _7 m7 A: ] - state.running = false;
; q7 p% i- s4 o% X - state.f.close();8 W1 N* I+ @/ @
- }5 n# \: z/ G8 U6 E5 i. M3 T1 W g8 B3 C6 t
- / c, Z$ i! h+ H6 @$ M
- function setComp(g, value) {% t6 @0 L/ w0 r. \8 i7 o
- g.setComposite(AlphaComposite.SrcOver.derive(value));# v1 R8 A3 ]5 J* V! {; ]- _' v
- }
复制代码 . \! C! m1 @0 c
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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* b6 ~2 p" V6 B* X" Z1 h顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( S I9 c9 R, G) l0 i
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