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, O" Z3 V- w) n* A5 @9 P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。
/ g+ `% ]8 o$ b# k/ t1 T- importPackage (java.lang);
* d6 t) p9 J- K( n0 b! ] - importPackage (java.awt);, V8 |. X8 L Z9 i
8 v* @% m% F; q Z7 f5 _- D4 j5 l9 P) R4 T- include(Resources.id("mtrsteamloco:library/code/face.js"));. Y0 p8 p/ g1 W2 h) t& x. g7 P
" r$ \* R/ Q, Z$ ~6 N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ F( L, p3 u2 E2 a
: o# y4 Y1 ], p+ {3 W1 P1 ^" a9 M- function getW(str, font) {9 l2 N# ~* r5 T7 z
- let frc = Resources.getFontRenderContext();
' h7 @. }2 x1 H2 L% v/ W( T - bounds = font.getStringBounds(str, frc);# R* k+ p! ?( x3 F* ^2 e
- return Math.ceil(bounds.getWidth());
- z% ^: u& I) l- X8 b; v - }; Y( A+ a/ {( w8 a
g! [5 `# b+ [; v# x# B! P6 T$ F- da = (g) => {//底图绘制
2 F2 R: V0 ?) \) d+ b- f. W: _ - g.setColor(Color.BLACK);
G3 l1 ^( v1 ?. j6 T/ e - g.fillRect(0, 0, 400, 400);3 u- r. n6 W7 G3 w3 L' ~
- }
; b% _7 A2 X# n" q1 x - ) X* b0 s% f/ w" B
- db = (g) => {//上层绘制
3 k5 N% F4 `; A# _+ ^: R) k - g.setColor(Color.WHITE);
" _! O$ e% t3 \2 } - g.fillRect(0, 0, 400, 400);3 c5 C4 A2 o/ D: J
- g.setColor(Color.RED);
8 l( {+ c" i9 X1 Y4 D E - g.setFont(font0);+ F% n3 o6 z' F
- let str = "晴纱是男娘";" \& D6 [! [* E0 o& U/ l
- let ww = 400;) [" s# V G( J0 b* d
- let w = getW(str, font0);# x8 K Y, L$ Q" L8 T W9 L& q0 C
- g.drawString(str, ww / 2 - w / 2, 200);9 t6 ?5 h: i! U
- }
9 F; C) Y" J& V3 z$ S - 6 s0 J) N1 ]& R4 |4 C1 I" q" i
- const mat = new Matrices();
. ] |4 e$ S/ {% ?9 C/ M - mat.translate(0, 0.5, 0);4 p$ U; @* {% X( N( G
- " A! l# o' `6 Z; g
- function create(ctx, state, entity) {
5 O% D0 d$ v+ H - let info = {
; {7 Z& a7 x7 T7 A C - ctx: ctx,
/ M3 @+ N8 Y/ n - isTrain: false,, V) ?( K* u2 r& j' C6 [
- matrices: [mat],
2 S1 L7 o( n- R" R4 r) _6 g) c+ h* y - texture: [400, 400],
7 r0 I! B+ l j8 X2 t - model: {
" F Y) n3 [, j+ }: C - renderType: "light",
" z( K1 }- H6 ^6 ~3 F) j" G9 _8 N1 H& v - size: [1, 1],/ b4 R# s2 R% L# t# h2 l
- uvSize: [1, 1]
5 @4 W" L2 t0 H; f' |" B! n1 H0 a }2 { - }, q. X) N/ [* r( e9 x }" w
- }
0 r! d. \6 b+ K& n - let f = new Face(info);; T' O5 x2 J* [1 }
- state.f = f;
i3 c# r0 |% N0 I* y" ? - 8 X. Z+ {8 g- x4 t# M, }
- let t = f.texture;
- W$ h& J- I' E! Y" J/ T - let g = t.graphics;; Z/ R0 ^2 I3 n
- state.running = true;
& w6 @; c" _* z8 | F( E" T - let fps = 24;
0 N3 Q% ^1 _3 W( P - da(g);//绘制底图
4 b0 W- @( i8 ?& t w! h - t.upload();
9 I0 c, [* G1 F# z% a X; k4 S - let k = 0;: I! L+ o! J" W- v
- let ti = Date.now();* e/ E' _9 v! w% A# J
- let rt = 0;8 v* h) S1 O( O" p# z8 G
- smooth = (k, v) => {// 平滑变化8 l U$ Q; e& V2 ~' R9 P3 T
- if (v > k) return k;
. m+ n, ]+ |& {8 P - if (k < 0) return 0;
" j- t s' F' E - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
5 h4 R0 X. @5 M: I- v+ V - }
3 T4 l# k' M% V" r* Q. u) k% s - run = () => {// 新线程
4 G$ g1 d. ?9 e3 S/ Q" ?7 t - let id = Thread.currentThread().getId();
' ?( b! X- v# b6 c: s - print("Thread start:" + id);. w$ c. x: ^+ n7 L. S* S
- while (state.running) {
' ^( K8 O3 C/ E0 I7 h2 g" t( y - try {
: A' k- H0 w+ D0 I* a1 z8 e9 i - k += (Date.now() - ti) / 1000 * 0.2;
& D1 h: N. x. p0 e- ^' J - ti = Date.now();
3 z* W* b( C E - if (k > 1.5) {. Q* S7 J% ?! q0 g& C1 n
- k = 0;
1 y7 _9 c9 o6 o( q2 Q1 Z - }4 L, V8 X2 T2 f" a
- setComp(g, 1);
, }3 L. p5 E* C# R8 S4 K [ - da(g);; ]) a/ O6 D$ N* k1 h, u, A! h9 ^
- let kk = smooth(1, k);//平滑切换透明度
" K/ N6 \3 C9 I: N - setComp(g, kk);& N4 k( f0 [( z4 \
- db(g);
: [% v5 ]0 E1 R& V- P2 `2 S' P) z - t.upload();
( O- S0 i% p! ]% S& Y! U, i# k) f - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 {8 a0 f2 a L! |6 x - ctx.setDebugInfo("k", k);. f, x: {$ j$ A. m% I" j2 n& k& x
- ctx.setDebugInfo("sm", kk);
1 W* R, B& D! p9 _' ` - rt = Date.now() - ti;
' a3 y0 I$ ^/ P! @( a6 @6 h - Thread.sleep(ck(rt - 1000 / fps));
/ O6 x0 _- D& t/ D - ctx.setDebugInfo("error", 0)% k$ Y* x( z i! [: G2 k4 {7 O
- } catch (e) {
7 w5 R" ~) g$ x - ctx.setDebugInfo("error", e);
1 g: K7 U5 h% q7 d) s/ w# v/ R- P! o - }, d& }( C6 w, X- Y- b4 R$ l
- }: e: Y. K: ^8 ] R/ l
- print("Thread end:" + id);9 N0 T% F& m4 A( V' u
- }/ w# P! |, H) K" @9 T
- let th = new Thread(run, "qiehuan");5 h8 ~0 ]# S$ q- H1 R# O0 A0 V
- th.start();* P3 {& q" a* B- ^) z& B
- }
5 ~8 W% m% i0 @$ r - 0 R* K9 a3 h$ m1 x* T q5 @
- function render(ctx, state, entity) {
8 }: V" @- y4 D+ [) u6 ~$ \ - state.f.tick();" j1 w8 c- n! y' o1 Y9 P
- }
* P) ]0 B+ y+ }( e - # D0 o4 h% u2 t, p
- function dispose(ctx, state, entity) {
6 b& Q/ K! s* T# m2 e" w4 U - print("Dispose");
- o0 Z, `7 g: S1 E" l$ U4 E) R - state.running = false;
9 c% R3 A& a0 ^$ | - state.f.close();
' y6 a# t# Y! ~/ ?. N, s# @ - }
* J% K1 |( k( f! e E - 8 I4 a; U/ x( M8 S2 O$ g
- function setComp(g, value) {3 T$ @7 q& a! d5 E1 P
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 H0 e7 ]% k, S9 K1 Q - }
复制代码
) g1 {' a E! X2 W) w. ] b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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6 P/ d- @# w' o: x9 ^
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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