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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。
4 y& ~2 @6 F8 H8 z! _8 n0 n2 j, J) [- importPackage (java.lang);. [) Q5 H4 ^6 e2 n4 U* Y
- importPackage (java.awt);) n* w0 T% R. C6 p q' a1 }
- i3 D9 X0 z' W$ b; [- include(Resources.id("mtrsteamloco:library/code/face.js"));7 Q& {& Y* n8 R. w
- U: K; `9 y. ~8 R. z/ c, w" E
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);, M4 j1 [, l% n; }( o0 H) G
- 1 {4 W/ g. V8 q7 ^, A2 G# S
- function getW(str, font) {0 F% |. m- K2 \+ s0 k1 J& o- t# S; Q6 Q
- let frc = Resources.getFontRenderContext();
3 ?7 M4 q& ~# s/ [$ ^8 p - bounds = font.getStringBounds(str, frc);/ c& g/ }' t3 H1 r
- return Math.ceil(bounds.getWidth());
* k4 w% |3 h6 F - }) D2 f1 \; O. i; a
5 x9 C! w- }% F$ W. {- da = (g) => {//底图绘制, t* X+ b7 v" [9 ~1 }: H1 e
- g.setColor(Color.BLACK);
5 t1 U2 Y3 a, p+ y5 I - g.fillRect(0, 0, 400, 400);. \2 y; a( F Z
- }
' m4 `+ x1 Q3 T* i) F7 b - + \3 E& [+ a; W$ r0 [
- db = (g) => {//上层绘制1 r) y$ q$ j/ j* o
- g.setColor(Color.WHITE);
* b$ `" l6 Q* D1 x1 r4 H& } - g.fillRect(0, 0, 400, 400);
+ R( X" j* a( \! b - g.setColor(Color.RED);
6 J3 U8 N* ^4 V* f" S - g.setFont(font0);* Z2 ~* E/ k; Y6 ?# D. N a8 H
- let str = "晴纱是男娘";
. E7 A, K0 E7 a/ S- V" N/ u5 x - let ww = 400;
2 _7 Y2 M; k; k; i. b; U - let w = getW(str, font0);
" ^4 r! b6 W4 t2 u# m& Y - g.drawString(str, ww / 2 - w / 2, 200);
% ]- \ g6 {4 `, V: r6 B - }
9 q% Q! D4 a+ U
' r2 `* ^8 j2 H- const mat = new Matrices();. W4 ]) Z9 n- V& h- N4 C' p0 V# j
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
}( A( c& L2 I, Q% U - let info = {
r, g' o/ Q4 {8 h: Z - ctx: ctx,
) G" M& P2 }9 ^9 V" t' n - isTrain: false,
$ Q W7 m5 V& r' L, Y - matrices: [mat],
, n$ p! y( i, ]. M7 { - texture: [400, 400],
j" P4 _: g% S/ v4 s6 B1 E - model: {1 ?6 }5 f; z* g
- renderType: "light",! F! `3 S9 k- q/ y0 i, K+ \- q6 I
- size: [1, 1],
* R, ?3 {7 w) n2 o* n2 g6 n d( L - uvSize: [1, 1]
0 H4 H* a' u4 e% Z) s0 s% F, P7 @ - }, b" o- v) M! {$ E. s0 I# M0 E
- }9 z; I0 L$ W: D7 o! V
- let f = new Face(info);. x5 n- F: ~8 L3 z
- state.f = f;
6 `4 e' y1 e0 V# p& { |& O/ N
/ }! Y2 G; z0 U5 h3 t- let t = f.texture;
7 z3 o) B* P9 w - let g = t.graphics;" K2 q1 \ m& T# y: P! }0 x8 q
- state.running = true;
0 b5 t" ]! R- x& K0 m) Q7 [9 D2 r - let fps = 24;2 S d7 i) b; f% {) s
- da(g);//绘制底图
; l( a: A" r+ |$ N - t.upload();
1 H2 ^, I& f O8 i- b; D& T, q, h! U& m7 e - let k = 0; d& W8 r# N& [2 V, z' Z: s2 B
- let ti = Date.now();
# h& f* o. s6 ? - let rt = 0;3 a& b6 u9 Z! S( @5 Q
- smooth = (k, v) => {// 平滑变化
/ Q' C4 d+ m7 ]9 a. \. T2 O - if (v > k) return k;
3 }; U. ^* h( ~7 m# {/ R. j - if (k < 0) return 0;$ ^5 v! A. l1 ?! u; H$ c( p
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;* v0 I" z* r! v) x" s% M
- }6 O! u+ I, r( p( o
- run = () => {// 新线程2 `( q& h/ N' O; n3 y6 s# ^1 P8 l
- let id = Thread.currentThread().getId();, z- N& K6 T5 g: N+ L2 D/ o
- print("Thread start:" + id);
& Z3 [5 |' D. t! M- B - while (state.running) {' ~5 `$ l% \ g5 t4 B$ E9 C- m/ C
- try {/ U: L% A+ `- l0 `& u+ k4 E: m
- k += (Date.now() - ti) / 1000 * 0.2;* R4 R. ]% i& F o
- ti = Date.now();
/ K! {+ C5 j& O$ d9 q+ P - if (k > 1.5) {3 H( \/ }8 ^% T
- k = 0;! O( o9 B( y2 S: z0 C2 x) U
- }
) d% j/ Z2 t3 n7 z8 _/ u( X - setComp(g, 1);5 Z' n" ^5 U" r/ V! n: K- j: {- e
- da(g);: ?% t' L" {9 V1 q# p; w2 y
- let kk = smooth(1, k);//平滑切换透明度8 d/ `5 ~7 y* @7 y! }, V: O
- setComp(g, kk);
, {4 e" r+ b4 ^3 c - db(g);9 K3 z/ S6 }" A+ ^% U
- t.upload();# \! F8 N V* P- a2 j
- ctx.setDebugInfo("rt" ,Date.now() - ti);
. c& N' k: Z1 C- L; A* B - ctx.setDebugInfo("k", k);1 L' D1 G! z( o# k) y
- ctx.setDebugInfo("sm", kk);/ H, |! p) F5 f. i9 w
- rt = Date.now() - ti;
' D& d: `3 H2 h: D9 ~ - Thread.sleep(ck(rt - 1000 / fps));1 `( c9 [* i# ?( n" H& e; v
- ctx.setDebugInfo("error", 0)
5 O1 }: ]8 q9 x% }( e" z - } catch (e) {
# _& m/ y6 [4 o$ P* r1 g - ctx.setDebugInfo("error", e);, B! t; g) _- D$ F
- }, B2 l- t" d) g9 |- p# ~
- }3 ]4 [1 q4 Y* i# j
- print("Thread end:" + id);! j H7 `5 Q% Y# Z% z8 n9 O
- }5 p7 z! f' Q1 T4 i
- let th = new Thread(run, "qiehuan");
) t+ R' ?) A- t+ a/ P( Y - th.start();
! }: [2 r" d6 s4 D( H - }; k' P i( g$ P+ D7 }
- 4 z O( t/ b- `4 g+ ?( B* v
- function render(ctx, state, entity) {% d/ l6 X' I& _
- state.f.tick();( s1 Z9 C3 D0 q$ M
- }, ? ~" D* `2 x4 P u5 h
" k) R7 M; h- \( }2 Q- function dispose(ctx, state, entity) {
5 x+ g9 u; a% c1 d! H% C - print("Dispose");
4 C7 p) C$ M4 |9 o! \ - state.running = false;; e4 G2 [+ V# V/ }' C: q8 C L3 H
- state.f.close();. U$ U" I% D1 v9 Q& \& V
- }
4 G( k. Q' l" W
1 K, p# @9 i7 |( \! t- function setComp(g, value) {3 ^ p$ ~, x4 r% Q6 s9 L
- g.setComposite(AlphaComposite.SrcOver.derive(value));
3 r2 [9 L) ~* s; n- F - }
复制代码
/ ^6 ^% t7 z: h. d# Q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。
7 ?6 u4 Z+ Q- K. o# E: d4 b" _$ G, k4 v; e; |4 d
& U( v8 G% i) ]# B顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): x0 J& S! T( [9 v" r5 f
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