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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。2 |( {, w. D n9 N
- importPackage (java.lang);5 \6 ~1 K& `" e
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));% z; B$ X% G" d& F. k
; n7 p2 T' b: T- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
3 E& N7 w9 A' P - let frc = Resources.getFontRenderContext();
) y8 Y* V/ w1 W# u" e) V - bounds = font.getStringBounds(str, frc);
0 `7 M$ f# q! v6 Z0 G& c - return Math.ceil(bounds.getWidth());5 ?# W$ E" e: z/ {
- }9 M7 ]4 }. Z* H7 v" o9 g
0 Z$ w! |% W% y: K+ y- da = (g) => {//底图绘制
" S& \( W' S. }1 ]5 V - g.setColor(Color.BLACK);1 F$ F1 ?5 ]1 ^8 Y% @3 k4 ?3 I
- g.fillRect(0, 0, 400, 400);9 G- A4 ~# T! X$ G- o) }
- }
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- db = (g) => {//上层绘制8 N$ L: D. J- a# ?
- g.setColor(Color.WHITE);
$ P7 C# y/ Z- x0 \: j) v - g.fillRect(0, 0, 400, 400);
& j5 L( I3 w3 ?9 U0 M: V - g.setColor(Color.RED);
6 Z- H7 M( B% G- B5 B - g.setFont(font0);
# w/ m. g; E( p4 @; \- W - let str = "晴纱是男娘";' v. H+ c) ~6 ]$ _2 z7 ?7 P1 y
- let ww = 400;7 A! \6 E; f7 G2 O
- let w = getW(str, font0);, k9 ?7 f+ @/ W* j4 Q* k; N1 D
- g.drawString(str, ww / 2 - w / 2, 200);
# {0 k7 [' K0 u& e) D - }
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$ R- C' J2 D# T- const mat = new Matrices();4 H R2 w: [3 g) |; j# s
- mat.translate(0, 0.5, 0);. D6 b7 i' O5 t7 L5 \+ ?" T% a. s
- - {: d4 o2 g" }( j
- function create(ctx, state, entity) {; [- J# a8 n4 e* i
- let info = {" ^8 f& c- i% M
- ctx: ctx,
( B8 o1 `; J; o( d7 l0 X - isTrain: false,* Q) X8 @& [" R* W% @
- matrices: [mat],' l2 n) I7 F6 X; v
- texture: [400, 400],
- S" R8 g& r y' C- k2 C/ { - model: {
8 R1 X# \( U7 R) d# z - renderType: "light",
8 i: a5 }: J G: d1 G - size: [1, 1],
( L0 U# d4 q5 Y9 X) F - uvSize: [1, 1]' ]3 u& T# q" c9 j# c
- }
( r0 m! \& h" d" ~* X( n3 d* M$ r - }
. I( I0 R( e9 H& K7 B8 j1 ^ - let f = new Face(info);; i/ A8 d. G8 x: J# |! V7 l# ~
- state.f = f;1 @! G* |7 ]5 ?! U* e1 g9 {
/ Q# v6 | q8 z" Y7 L5 P' A" P- let t = f.texture;; y* N+ R6 d- K1 W+ \( H; t
- let g = t.graphics;$ \# L) s1 t1 |: N0 J
- state.running = true;6 }0 d$ a( h& b4 E4 c3 j; n- m3 l
- let fps = 24;/ d) A; t! A$ S
- da(g);//绘制底图0 f+ X6 K; p$ o# Q5 B& G
- t.upload();1 S, v4 L* f+ X& r& {
- let k = 0;
8 d5 h; O+ L' o - let ti = Date.now();
1 X+ @% V* B+ i% P - let rt = 0;
* W! y: r: u- H* i* j( f& [ - smooth = (k, v) => {// 平滑变化. w2 S/ R; S& W% b, c
- if (v > k) return k;
: ~8 ^+ w4 n( D6 ] - if (k < 0) return 0;
- U0 D. ~" K5 a+ X% @2 y - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
: o+ J9 U3 T$ o8 r0 ^4 g - }
$ b: K- _* S4 U - run = () => {// 新线程- c: |8 }( [/ K9 F
- let id = Thread.currentThread().getId();: Q" [& L$ ]- e2 J+ P1 R; Q
- print("Thread start:" + id);
1 d$ b" c+ v9 z6 o - while (state.running) {
+ I* S: v% F/ y/ J& Q( e - try {/ X t) [- Y9 N, l( Q# V! r
- k += (Date.now() - ti) / 1000 * 0.2;
5 `$ Y1 P1 y3 P4 \2 B - ti = Date.now();. ^5 B. x$ b; B J2 ?, U# ^% [ M
- if (k > 1.5) {8 C% b" F+ ~+ `2 Q
- k = 0;! S4 D/ n- }( [1 K- `' Y. _6 N+ t7 v
- }
$ g$ ?# d/ J' h+ O- Y% z: B - setComp(g, 1);; v$ a9 |" V$ e2 B
- da(g);$ k/ L1 A4 G5 }
- let kk = smooth(1, k);//平滑切换透明度
/ O5 M3 s: Z4 p: j - setComp(g, kk);; X. F8 M: X* P: u
- db(g);# i* B3 X# ^* q0 w0 G1 b
- t.upload();7 O' o" b4 ^0 N2 S( m
- ctx.setDebugInfo("rt" ,Date.now() - ti);
6 w+ Q% M8 q p+ {- {/ N' ]5 Y+ j - ctx.setDebugInfo("k", k);7 m2 V+ g2 E ^& E/ \4 ?
- ctx.setDebugInfo("sm", kk);
/ e( Z2 I0 b* g5 {4 w - rt = Date.now() - ti;# q8 d# p8 |# M7 f+ i
- Thread.sleep(ck(rt - 1000 / fps));$ H+ S: D7 R1 l
- ctx.setDebugInfo("error", 0)
/ L$ X$ q! t, v1 B: @5 s - } catch (e) {
& w" f b2 T5 x+ o/ L: c - ctx.setDebugInfo("error", e); G2 G4 l' o0 x- }8 G: k
- }9 k# V4 L! j% R' T, Q
- }" t1 X+ A' E. U! D
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");" D6 {1 K8 ^ F/ J) d
- th.start();, A% r: W$ e$ E! ?
- }
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- function render(ctx, state, entity) {
2 o2 w, F( V) }5 o - state.f.tick();
3 K! F+ a/ n" ~9 a: G - }
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- function dispose(ctx, state, entity) {7 i" K) t. R2 B' k
- print("Dispose");
+ d. B7 u+ h f5 k) u7 X - state.running = false;
: n0 X) x, l$ l1 j* a7 P - state.f.close();
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0 ^, @& V' Q, N* v/ T- function setComp(g, value) {2 Z5 o: b1 b# w/ w
- g.setComposite(AlphaComposite.SrcOver.derive(value));4 c- }& s" x, n4 G! `. ]" Y
- }
复制代码
) c% M+ k7 f3 t! 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。# o. @8 Z: g/ x/ ?
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) p; E( K; F5 \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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