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% }9 r& j( Y: H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。
K" B% O/ R. j, f2 J" M- importPackage (java.lang);" K: x3 h; L4 |) ?$ v2 K3 t
- importPackage (java.awt);" Z) r* C/ p! T/ I3 I' M+ f
- 1 U; _5 Z2 u$ K [! }8 s
- include(Resources.id("mtrsteamloco:library/code/face.js"));8 J) p9 x% n3 F N2 d0 D8 b8 f
- # z! G o/ H6 o9 m1 z) z3 w
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
2 M% F0 I' E- o; s" D" L
" @. H6 w# Q0 U. U7 q* B- function getW(str, font) {! ]7 N* W3 r* X3 ~% W
- let frc = Resources.getFontRenderContext();( Q" G. D3 R8 Z3 O2 p$ |
- bounds = font.getStringBounds(str, frc);" l" M4 v+ s' y; o1 q
- return Math.ceil(bounds.getWidth());3 j! B7 z! X" q( b) h: G5 n+ V' C
- }
7 D( ~* ^% `: f1 R' ]2 {
P+ ~0 D4 G( V- da = (g) => {//底图绘制# G. l% a4 r# \
- g.setColor(Color.BLACK);! g7 r/ w: O3 v4 W* n
- g.fillRect(0, 0, 400, 400);9 L% P/ z5 k( t8 U
- }
) K% u; C9 G! X5 E- j0 t - ; J' p% H& v/ P% z4 Y1 q* A
- db = (g) => {//上层绘制
: V8 Q. s/ ]& ?5 A; n8 G8 |& e - g.setColor(Color.WHITE);+ m* F! I* b1 |! o' ~6 p
- g.fillRect(0, 0, 400, 400);
( ?# \7 M" q! g4 O, q# A' @ - g.setColor(Color.RED);0 b h% {% B* z
- g.setFont(font0);
u2 u* U; @9 i& S- S- C1 h - let str = "晴纱是男娘";
. C& i t& u8 _& k( E! M - let ww = 400;" [* F5 Q) _1 c$ @+ \
- let w = getW(str, font0);0 H1 @% o+ Q3 m' G' a& a4 C. f) {
- g.drawString(str, ww / 2 - w / 2, 200);6 x! P& c5 h, {" j" M7 n4 @0 _* x
- }5 z8 g6 P4 r& B) T8 }! P
3 Q/ C) x2 x' e" g7 s- const mat = new Matrices();9 u2 {7 d: N* {7 W- z% l
- mat.translate(0, 0.5, 0);, u4 x" Z7 p6 _
, F2 J5 ?5 t5 ]- function create(ctx, state, entity) {
8 u5 b3 N1 x/ W) F$ _. K3 ` U" J - let info = {) ^7 V: J; ~! @5 _5 s
- ctx: ctx,
! d7 t5 V. ~9 L) G7 `/ A$ o7 q; ] - isTrain: false,
( g4 b% q: z% d1 f# @7 }& }+ u - matrices: [mat], k3 P( r7 d7 N/ d( [
- texture: [400, 400],
X3 @' X2 F( u; a/ ` - model: {
! K$ k }' a" [" o0 w7 X - renderType: "light",' \$ c; X! i2 N. r" F+ @
- size: [1, 1],% U2 ?- T; z! y- z L2 F
- uvSize: [1, 1]+ p6 P' d* h( @ t: @
- }
" p! _* V% T4 i) E, B- m, p - }. @/ {6 g) ?' y: j6 x. s
- let f = new Face(info);
+ o/ s( g0 Y, B, m% t - state.f = f;7 t4 b( O% E* k' \7 |
& u3 V7 K8 B! e- let t = f.texture;
1 u$ F5 R; u& ? - let g = t.graphics;
: N# K Q, E& {7 [9 M - state.running = true;
: C0 J; E4 B: f) L& D9 m9 B. c - let fps = 24;
2 {3 K! C/ b0 [ X. J; { - da(g);//绘制底图
( f P1 Q! K) H* k! n" E7 u - t.upload();
% F/ S" f9 s0 y: Q$ e - let k = 0; Q: G0 }# x% ?4 {; ~6 p
- let ti = Date.now();
* b' W! K7 t) s) e e) ]6 A - let rt = 0;5 D- |* _, {0 O2 ?
- smooth = (k, v) => {// 平滑变化
3 A- h2 s2 n( X+ v# V - if (v > k) return k;
' t' x7 f; `3 L - if (k < 0) return 0;
5 K, h' t: s0 ] - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 r" u9 S) d: c' ? - }4 t! M6 s& }4 s6 q
- run = () => {// 新线程& q' J* U0 N% g, F/ \6 G
- let id = Thread.currentThread().getId();1 V7 G x, l# d& M+ L$ p$ l
- print("Thread start:" + id);+ \, Y2 v- I1 W% e+ K0 M
- while (state.running) {
8 }+ `9 e; E6 \% Q; t8 w# @0 P - try {" t2 o1 W8 u, _/ {4 m
- k += (Date.now() - ti) / 1000 * 0.2;
' h' H, A5 o! ^, a3 Y! s6 L - ti = Date.now();, \" N0 a9 z! C: O7 h
- if (k > 1.5) {$ _' x6 E7 n/ S0 Q( T7 P6 g) N- l
- k = 0;
v4 j, k$ h2 M+ `6 V" L" t( U - }
' z4 g0 m! Z# f7 Z a/ |. |5 H - setComp(g, 1);
6 E) E" I& u$ M# `; P8 y$ i' q - da(g);/ E- C* C# `, o/ {# X3 l0 \" m
- let kk = smooth(1, k);//平滑切换透明度- {/ q6 n! U* v9 |% o$ r6 j
- setComp(g, kk);
; j" D' \. b) V: J9 ^% ` - db(g);: k2 C, z( [5 \+ p
- t.upload();" t. O- V' |8 ^% ]$ J
- ctx.setDebugInfo("rt" ,Date.now() - ti);% N6 P- W+ `! A/ {
- ctx.setDebugInfo("k", k);1 U' @# f) b1 g5 p. C
- ctx.setDebugInfo("sm", kk);. G/ e# w: W7 k
- rt = Date.now() - ti;
5 u: a# J1 }( A% d - Thread.sleep(ck(rt - 1000 / fps));
6 S- U; b, d. ~+ K+ { Q/ i- D- A - ctx.setDebugInfo("error", 0): T+ F6 K) z* Y& L i& J$ r
- } catch (e) {
* {* _, R* M3 x" \/ I# h - ctx.setDebugInfo("error", e);
2 j$ U6 d/ w0 q- @. D9 u# Z3 C - }
[$ d2 d2 e5 `4 e# X0 [ - }
# p( d. ], z, S - print("Thread end:" + id);' N9 a8 ?- O4 L7 r o+ G1 O1 {
- }
0 i6 c' I" d% p* E _: Y2 m/ E - let th = new Thread(run, "qiehuan");
* B$ ~2 c1 k0 {; I - th.start();+ p7 U7 j9 |$ c f
- }& R& g2 H. J& \; I
3 R( e' w& C O* w5 [; x$ ]8 W5 v- function render(ctx, state, entity) {% h d- }. h3 T; }6 L5 W
- state.f.tick();
2 ?: A2 v- x9 H - }, _7 F. `4 B4 Y- o/ \1 X. `
- ) }4 ~% r5 ]+ g
- function dispose(ctx, state, entity) {
$ K6 `* A; e8 H3 P6 C; G( R) | - print("Dispose");
3 ^7 d; y6 q5 Q2 L6 V - state.running = false;5 t% m* j Q+ X* \5 q7 \5 U' m& P
- state.f.close();
4 s& I2 E0 w) x" s" C4 t- Q - }
0 N i' \7 J# q. u6 u. _. x, H$ f
* z( u2 t4 a+ t& p7 K, B7 l$ A+ y( R# G- function setComp(g, value) {; G4 S( Q# Q- }+ f
- g.setComposite(AlphaComposite.SrcOver.derive(value)); e* |; y( t/ }; z j" b( Z
- }
复制代码 : }+ B: a& d& h% C) b$ s5 o
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。: x, C8 \4 w* T. @* h$ S0 g
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) U! o9 I& G- i X& N9 l- A* t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)6 B, n/ r4 |9 |3 B, [3 X- N
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