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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 v; _* ~+ B; S7 v6 B- importPackage (java.lang);' U& Y @. u8 n4 ^, W, v2 i2 Y
- importPackage (java.awt);' y4 P4 n4 }& H! t- f
1 t! } g4 u4 Y; V+ }9 j5 e/ O% t- include(Resources.id("mtrsteamloco:library/code/face.js"));3 U/ ^8 L" P" Y1 @+ U
- . p& b+ f Q( y2 K, j+ g
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);" ?4 _- R0 V P" {) ?
- a8 J* [ X& e4 Y, P0 {* H! f
- function getW(str, font) {
7 L' y V+ P+ V: o" e0 R! u2 ~1 [ - let frc = Resources.getFontRenderContext();
6 Z q( l2 }; R2 R- r- e - bounds = font.getStringBounds(str, frc);
# K% d- b1 T; l2 u- b - return Math.ceil(bounds.getWidth());
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- 2 s9 q; z0 C r7 `% p/ K# j2 b
- da = (g) => {//底图绘制
, M0 s) B0 z/ h F( b - g.setColor(Color.BLACK);6 R) W& h% X& A' e% g3 y
- g.fillRect(0, 0, 400, 400);
9 a( X$ L. W$ |3 a2 B6 A6 s - }
. B B% f- \( t- ~& z2 l! n
- E, f; ~0 B C- db = (g) => {//上层绘制3 Q J1 K3 s4 C6 @
- g.setColor(Color.WHITE);4 G8 h+ j' t! k; X2 c0 p* L" g
- g.fillRect(0, 0, 400, 400);7 ?- l7 u4 X: C7 z. W% x( X; \; |
- g.setColor(Color.RED);
5 S5 B5 X) C% g - g.setFont(font0);
$ p& f9 w* V7 I+ Q5 n - let str = "晴纱是男娘";
. Z& I. W0 s$ N2 t8 b9 u# |: G - let ww = 400;
. [6 O3 O9 g$ A+ ?$ O! h8 `4 C+ k - let w = getW(str, font0);
9 Q4 n2 v# b" d p+ l - g.drawString(str, ww / 2 - w / 2, 200);
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- 4 y% ?6 c% ~, B, T7 O s1 l2 I
- const mat = new Matrices();
- l8 Z" N6 q( B2 Q4 S - mat.translate(0, 0.5, 0);
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+ Z; f( \: l" u$ T# L. T& L$ t- function create(ctx, state, entity) {
! {! L/ }9 x* Y3 [( X+ ^ - let info = {* Z9 i, d0 u4 \, ^# S4 Y
- ctx: ctx,; N. N# g7 w* c( ]
- isTrain: false,3 O: C' R, A# R. d4 i$ u4 M4 f
- matrices: [mat],: B. I, J( I q5 y( T
- texture: [400, 400],8 L3 P7 U" @3 M' w: R
- model: {! c& v7 t3 Z" `4 L
- renderType: "light",0 r7 c9 o" T5 D+ y% T
- size: [1, 1],
& @" E& s: Y4 l0 t7 | g - uvSize: [1, 1]) @; d& U2 _: Y g" @
- }
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- let f = new Face(info);. V, I, G$ c: T2 z+ b
- state.f = f;
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- let t = f.texture;
4 P- \& a4 |1 K. j - let g = t.graphics;
3 P( h$ P' _: |, Q/ C - state.running = true;- C( m: w, S! R+ W1 R
- let fps = 24;
$ B# }% m9 Q; K( h! y! `- Y P# A5 o - da(g);//绘制底图& Q! Q+ F3 P* M- F# A: b3 k4 c# \
- t.upload();1 h- c# D. m* B# I
- let k = 0; _8 B1 R' a6 e4 r" s* Y$ z" l
- let ti = Date.now();
5 L0 t* t; a# y7 ]9 N2 ]) L - let rt = 0;
% P0 \5 R- T: R8 ~3 _ - smooth = (k, v) => {// 平滑变化0 d: _0 @" M7 |% u: x1 H
- if (v > k) return k;
( D1 d) A* E# { - if (k < 0) return 0;0 b! i* N7 q+ C. j" L5 j
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;+ O! P6 [) j' t! p: U
- }3 ~" s/ Z4 p! P* E# h `2 K
- run = () => {// 新线程* a" m0 E9 D/ X Z8 a/ G
- let id = Thread.currentThread().getId();
) K* k# t7 ^6 Z- l - print("Thread start:" + id);/ Y6 r$ S8 |1 U% j D( G& ?
- while (state.running) {
# g" W$ \8 \" |# n& X - try {: P$ |, s6 ], x }7 H% f
- k += (Date.now() - ti) / 1000 * 0.2;9 f' r1 ]; O5 j. Z% S0 Z2 X
- ti = Date.now();
9 q. h$ |3 v1 M8 g - if (k > 1.5) {- Q4 T- E0 [4 q
- k = 0;
) {, r; J9 R/ P2 O6 ?( z - }
/ Z/ m7 m3 x6 t r8 I9 O, U - setComp(g, 1);* G* i: Y" k; k0 v3 G, S1 l
- da(g);- k" J, H+ F2 t6 u' d9 Z, T
- let kk = smooth(1, k);//平滑切换透明度
* o7 g0 Y/ {! V - setComp(g, kk);
$ Q1 s' u, R6 U0 G - db(g);
7 S# @- K, A) c. E5 `' m4 | - t.upload();4 H# B! w, R. a( m
- ctx.setDebugInfo("rt" ,Date.now() - ti);9 M! v% R( g, p2 D& e
- ctx.setDebugInfo("k", k);$ K. O. s/ p$ s7 E& \7 k
- ctx.setDebugInfo("sm", kk);: z+ K" |4 \7 }0 o, M& I
- rt = Date.now() - ti; j% @% i+ O9 F; Z
- Thread.sleep(ck(rt - 1000 / fps));
6 {! N4 a$ U$ B0 B- |4 ~/ b4 k - ctx.setDebugInfo("error", 0)# p/ w% V2 g" @4 w
- } catch (e) {
" c! z+ w/ m' O) a- p- c5 K7 ~0 w9 e* Z - ctx.setDebugInfo("error", e);
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- }
0 ]/ \( i3 |! r/ m/ x - print("Thread end:" + id);
) q& [. {, o! ]; u& w' v% G/ ~ - }
1 D0 i( N5 \' z, F: w" i - let th = new Thread(run, "qiehuan");
: q0 O& @5 n) o9 G - th.start();
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$ |( M3 \; P- p$ N- Q- function render(ctx, state, entity) {
; Q4 t% {3 z2 q9 {/ T% Q - state.f.tick();" b, T& Q/ t1 N9 o1 d
- }$ R3 N2 r& d( d1 V0 h8 _
8 ]+ h+ I2 o& ?- i( Y$ w! x- function dispose(ctx, state, entity) {( h- J S/ ]- Y$ C
- print("Dispose");
' T/ p$ {# s3 E/ L - state.running = false;
1 ^' |+ d1 j* f - state.f.close();
8 H! ^* V9 S1 z: k - }
9 z! p6 z4 S4 R. ~# z' a d' y - 5 \& m6 t+ d5 N) `1 g# B! @5 v
- function setComp(g, value) {
4 Z, r; e b* ~* u: B! [$ R - g.setComposite(AlphaComposite.SrcOver.derive(value));
t- j4 E% I/ C% p+ _7 u - }
复制代码
0 K0 t& n* R+ e1 z% u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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0 x/ N) F5 [5 L% _8 A% D# 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)- Y3 w9 U. a9 G! [4 @
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