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j9 ~7 G% s+ j* ]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 A3 z7 i# e& u- Z6 @$ R
- importPackage (java.lang);
3 G( J$ g' c: N* J+ ]* B2 ~ - importPackage (java.awt);( C+ j5 ^ F+ S6 x
- 6 W! Z7 L3 z# Q3 ?/ J
- include(Resources.id("mtrsteamloco:library/code/face.js"));$ Z% w1 ?6 q; P* S5 s# f
- 6 o$ i; Q* ^" x9 G* M. y$ D
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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0 k3 p% O( f, K- function getW(str, font) {
: K3 |: W# o/ f8 M( s - let frc = Resources.getFontRenderContext();
# j k* ~6 W/ o" X7 K+ H - bounds = font.getStringBounds(str, frc);
; B }8 h/ `6 l" o1 v" B1 ` - return Math.ceil(bounds.getWidth());
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- * R1 g! e3 b; U
- da = (g) => {//底图绘制$ L4 N; z. ^/ q" m2 h
- g.setColor(Color.BLACK);
& C! ?' j7 A+ [9 C - g.fillRect(0, 0, 400, 400);
0 A* N7 K; `0 M" ?# u0 E - }
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I* |$ w+ `; A- db = (g) => {//上层绘制" u; d' i6 A `# I1 A S
- g.setColor(Color.WHITE);
' x) B% G! |2 `- _- V* Z0 |2 F - g.fillRect(0, 0, 400, 400);, @5 T- w# |# B/ t$ O
- g.setColor(Color.RED);
+ f' b' m: C9 ?+ s. h" o - g.setFont(font0);& c" u. w* F5 o0 e; e
- let str = "晴纱是男娘";
& O' [5 p; |8 L3 j4 ^+ D4 @/ s) u) M - let ww = 400;
# B! h5 ^! _1 B4 {# t - let w = getW(str, font0);
5 H+ Y, K+ @" o - g.drawString(str, ww / 2 - w / 2, 200);0 z2 s0 E9 { l& I
- }
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- const mat = new Matrices();! z5 @& ^, c3 ^( [3 V$ B
- mat.translate(0, 0.5, 0);
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?8 M3 y4 N8 D8 ]- function create(ctx, state, entity) {& @6 A, _( w1 } }$ @8 r; E
- let info = {7 r9 C( P* r5 W0 v) a7 g1 y
- ctx: ctx,& M( L8 J# a7 v& C6 t* B
- isTrain: false,
2 X7 U8 k# X2 K% d' G - matrices: [mat]," M- T" y5 L) N* K8 P
- texture: [400, 400],
1 e( Q7 F$ t, v - model: {
3 ^+ h* _% T6 c9 c: Q - renderType: "light",
5 A; w, ]: [5 @6 J - size: [1, 1],) T: y2 A7 B0 i5 B; }. z5 w% V
- uvSize: [1, 1] y. o& w* n" M8 j' e
- }
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- let f = new Face(info);% S. c$ _' B! Z' o8 p* Q3 w
- state.f = f;
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- let t = f.texture;
, ?, J% E: m2 C. h8 l, f" b - let g = t.graphics;
: Y! _ d* g# `8 c - state.running = true;( \0 n4 M$ G; t1 m
- let fps = 24;
6 m U* v+ ^( M- @2 h3 d - da(g);//绘制底图
) ^: O @0 k& R4 f7 F+ k( ~3 S- T - t.upload();
0 |; j& N. I5 v/ Q; b" l6 J0 p - let k = 0;
$ O. @% Q- x3 ~' c) y5 y: V - let ti = Date.now();
) E0 k" P8 ]8 ?( Y - let rt = 0;/ G5 E2 |6 r. |4 ~( N2 Y' U& A2 g
- smooth = (k, v) => {// 平滑变化- m0 q& t. q) K( G9 B1 b6 x
- if (v > k) return k;
$ p% V* x6 Q H# E/ u% | - if (k < 0) return 0;
& N) S5 e+ m& z9 M8 R8 B+ M - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;( L9 A& r! y0 r; Y+ E
- }
9 v2 g( [2 ~1 b+ y w - run = () => {// 新线程' J- o p) Z- r) c8 [5 ^
- let id = Thread.currentThread().getId();0 s) `; P9 Z" V6 S1 ^
- print("Thread start:" + id);4 S4 \: m4 u/ V
- while (state.running) {
2 a* t! o$ |' I( M6 Y& ` Z - try {
+ {0 O# E4 j& X1 P' H - k += (Date.now() - ti) / 1000 * 0.2;
7 f3 F( y) b3 E: Z1 b2 ? - ti = Date.now();7 F" E7 C; R) `% |0 N
- if (k > 1.5) {; b* u5 E& U' e# Z
- k = 0;
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- setComp(g, 1);4 I! _' q7 ]' F L" R! ~) B
- da(g);8 A4 v2 j: T- m6 F( g
- let kk = smooth(1, k);//平滑切换透明度
3 e, S7 m, H+ f7 k2 ` - setComp(g, kk);9 \$ B. I7 j5 o
- db(g);
; b" x! _8 \# u$ X) D+ d - t.upload();6 z; t7 B% {+ ^ ~
- ctx.setDebugInfo("rt" ,Date.now() - ti);
7 @- g* ]+ x+ X% T - ctx.setDebugInfo("k", k); Q5 P @; t+ B/ _% r" m- w" _: S
- ctx.setDebugInfo("sm", kk);
8 \4 ~/ O- m0 r6 R - rt = Date.now() - ti;- G6 u. B! K" ^9 X
- Thread.sleep(ck(rt - 1000 / fps));
! G2 ?5 H7 C5 x+ C1 Y, F - ctx.setDebugInfo("error", 0)+ r# f7 H% ^5 a% K d
- } catch (e) {+ [2 ^* j' s4 y, J' n: M
- ctx.setDebugInfo("error", e); n- P1 m+ J; K
- }( t2 [( K% _# j6 E$ N
- }" p9 W/ B) j) l! c6 @
- print("Thread end:" + id);- K7 p$ Y8 I1 k3 Z
- }5 K# H- \& p; R V
- let th = new Thread(run, "qiehuan");, v& i' a: e4 |9 Z
- th.start();9 e: ]1 Y5 d4 }) R& r
- }
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- function render(ctx, state, entity) { f! C: |0 G! l
- state.f.tick();+ G7 X4 P8 D: a }. x
- }
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- function dispose(ctx, state, entity) {; ~# Z+ w+ P) f y" ?
- print("Dispose");3 A! g+ J) l* B" e7 M" |+ }
- state.running = false;
4 I Q6 a) O. Z4 o$ J& Q - state.f.close();
# }# _) w+ I2 ^9 E3 k0 ^- _ - }& O: u6 w4 t; N
2 m Z: o+ \4 }( o3 J: J- function setComp(g, value) {
" G, u$ o3 ^' ] D h! M% h. ^ - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 Y3 _$ ]- U- y! ~ - }
复制代码
# T! M# P- X/ i. b; Z6 u2 t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)9 o- k" u: B; \1 X
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