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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。
/ E, L2 x9 \; x+ T9 G- importPackage (java.lang);
6 V. I' h. L4 s# t0 G4 _3 v - importPackage (java.awt);
3 q% w5 I; |2 y' p- ?
4 ^: Q! [/ B5 e. I2 }- include(Resources.id("mtrsteamloco:library/code/face.js"));7 o/ E2 K P6 z) R8 }' j
5 U! B+ P& _+ h! }) e% D) x8 g- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
4 b4 z3 n1 d* p - $ t. D) l1 }- k
- function getW(str, font) {
0 t- o% B% c8 i; o. N - let frc = Resources.getFontRenderContext();5 W; x" i7 W. R U3 F
- bounds = font.getStringBounds(str, frc); h" n; {5 g# v
- return Math.ceil(bounds.getWidth());5 d, A3 b9 n" i4 g
- }" P9 ~2 K" c" X. d' d# F, A
; G& E) L) `8 l) i% W- da = (g) => {//底图绘制' P0 A2 v+ P# z1 ~- f( `$ U
- g.setColor(Color.BLACK);
, a; k; A0 b3 o$ T - g.fillRect(0, 0, 400, 400);9 @- i% G- S% O$ ~6 Z
- }
+ G: k2 ^; Z8 _6 V6 u - + c7 o; H+ P9 v+ ?1 I
- db = (g) => {//上层绘制
/ y7 _# O5 T- J& e9 E4 G - g.setColor(Color.WHITE);
( m" t' ]8 ]$ y9 Q+ U* S - g.fillRect(0, 0, 400, 400);
* R6 z4 u: j' R9 R4 P - g.setColor(Color.RED);
' Q6 E/ t$ o" q* d - g.setFont(font0);
2 [; l2 h/ J d6 a3 |9 g - let str = "晴纱是男娘";
2 H( a7 B; ]# O) O7 Z - let ww = 400;
( B4 E: i: L; `& p - let w = getW(str, font0);5 O. I; J7 ~/ f3 h* `; U0 Z: Y/ f
- g.drawString(str, ww / 2 - w / 2, 200);% \% c% s! ]* H6 g( q
- }
& x7 e* @7 K6 q1 j! \ - 2 M4 t# I F+ m' J- S7 n# J% e* K9 v
- const mat = new Matrices();
2 U' }% K3 W4 O, p2 P - mat.translate(0, 0.5, 0);
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/ b' H4 ?% o2 H$ H) R) o* C' P; R0 o6 ~- function create(ctx, state, entity) {$ Q0 L% p# d% v5 g; e8 W( ^
- let info = {
7 Z, k+ F, D/ m3 @- X# ? - ctx: ctx,
+ _8 o* H! Z$ D9 h - isTrain: false,
- Q& } H h& o6 I - matrices: [mat],1 r& @% _# A6 {- V$ f
- texture: [400, 400],' |. b/ G7 G. |- Y
- model: {) V; `/ L7 ^, F) e f
- renderType: "light",5 O% ?8 P/ e- l# Q% J D
- size: [1, 1],
t# u9 N9 @+ b- r# A/ b2 g5 q7 d - uvSize: [1, 1]
- i9 z' U/ o/ ?* C0 L - }" c4 O- Q9 @ T
- }! u% o& o2 i2 S2 Z
- let f = new Face(info); ? E9 k! E" I9 V
- state.f = f;
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- let t = f.texture;; V; R. l3 ?$ X
- let g = t.graphics;
6 v9 c6 B7 Z4 S( l' N - state.running = true;
4 n7 Q! A8 e* {/ M# r5 j. e - let fps = 24;
$ w( D* ]0 Y* B* ^/ [3 \ - da(g);//绘制底图- l/ W- n& {" ~; p0 `, c
- t.upload();
9 v" V a; }5 c4 ], h6 d2 Q7 S - let k = 0;4 U( U* L# R& L- u0 y+ K8 \
- let ti = Date.now();* P" _+ K* f1 k. E) k
- let rt = 0;: ~9 ?4 @, {4 A/ h4 s
- smooth = (k, v) => {// 平滑变化
: P* V. l- ?9 q$ o8 s - if (v > k) return k;
8 f9 H* N: h& m' \$ X: W, P1 p4 X; i7 G - if (k < 0) return 0;4 ` t* x! t+ H' z" t- ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
3 E2 \# C. X! ?. J, G9 g - }; e2 s( P/ s6 ]5 f+ s8 }4 d
- run = () => {// 新线程
5 I7 |3 G9 v1 `6 t - let id = Thread.currentThread().getId();. e4 s2 ]; z$ ~3 G* e& g2 q
- print("Thread start:" + id);
8 j; Z" y% N9 C4 g1 j2 t* \ - while (state.running) {
, O$ V6 a# V! q3 q& } - try {
1 ?/ e9 ^9 K/ W2 P' ?+ m - k += (Date.now() - ti) / 1000 * 0.2;
& g1 t* y- d& Z6 Q% | - ti = Date.now();
4 R4 R: z. }* L2 c/ P - if (k > 1.5) {( M9 y o2 {" s( C+ W* k% b& N
- k = 0;
; ~8 y2 {$ {9 p$ n* |" Z( E% T% D - }; }* f* c8 N# r9 O- z
- setComp(g, 1);
7 v- o7 t0 U/ X/ b4 k - da(g);! _& d x0 a K& M
- let kk = smooth(1, k);//平滑切换透明度+ A: H% |/ z7 \
- setComp(g, kk);0 o, @" n7 P" a6 {9 j
- db(g);. u# E. W3 w/ a! N! x
- t.upload();0 G2 y# g! T% M
- ctx.setDebugInfo("rt" ,Date.now() - ti);+ |. P% U, X1 i& j
- ctx.setDebugInfo("k", k);
) j" s0 N* U# G( s. }4 | - ctx.setDebugInfo("sm", kk);
0 i3 t; _9 c2 M1 z' G6 d - rt = Date.now() - ti;- k; D7 p( K6 t4 ]; T1 t3 i
- Thread.sleep(ck(rt - 1000 / fps));
) G8 h1 `! o$ c9 Z* c - ctx.setDebugInfo("error", 0)
- F0 Y. w8 V5 ` - } catch (e) {
/ L) g, p, X% |, w - ctx.setDebugInfo("error", e);" g0 ^; [7 n& v
- }
1 C% k& R- D* P* }1 n3 w - }0 p/ s: S) ]: U( G h- Y
- print("Thread end:" + id);/ y" ^- _( N3 H9 J& n& C
- }& c" m/ p" U0 Z4 ?
- let th = new Thread(run, "qiehuan");
" O6 y: |. I% B, h+ R+ ]0 h - th.start();
5 b* Q/ Z2 b, ?, Y9 d* _+ ^ - }
2 R) Z* o2 `8 \* [ - , [4 x. u6 ^% Z, Y5 c; N+ p! Z
- function render(ctx, state, entity) {
1 U5 v# @% U& O& X9 ` - state.f.tick();
1 v8 f/ V; a. J( ^3 m9 I2 {% [& K - }
5 w6 z$ _5 X! @" f) h/ m# {% d - ; w* Q) n! O1 s
- function dispose(ctx, state, entity) {
* c, c& l7 i/ W& I! Y. ~1 j - print("Dispose");
5 H$ b) M+ O( }+ a# ~9 q3 |" S6 G4 B - state.running = false;0 c7 b! Z0 R' {% U* w; e
- state.f.close(); q3 K2 T" b# R, B6 r5 W
- }
5 a- t* f! ~% C& E6 w
) u) T- C) I0 p( W( B3 V) ?- function setComp(g, value) { R0 R' v' S' S
- g.setComposite(AlphaComposite.SrcOver.derive(value));$ O/ e1 t- v3 r# }% \
- }
复制代码
0 p$ W# j9 X9 X. Y1 _" M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。% G3 r3 `3 V+ [9 A. e
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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)# M# T- s; e% A m; |
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