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# c. ]: }; @' M3 L# }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。
6 D8 g: v$ t* R$ ?( R- importPackage (java.lang);
. A6 y+ ^# R6 g- f; A - importPackage (java.awt);+ ~# O+ R X- b5 s1 H4 Z3 c) c
) D8 S; s( _% F! u2 K0 v& X$ E- include(Resources.id("mtrsteamloco:library/code/face.js"));
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; d. S2 b* l7 i0 i7 e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {( h! p( h$ a* }/ @/ A
- let frc = Resources.getFontRenderContext();
7 D0 `3 i) O, V' h; L - bounds = font.getStringBounds(str, frc);
* c& K, j0 D! I7 l2 y+ A - return Math.ceil(bounds.getWidth());8 H0 P3 f# r! S
- }% N" w) ]! X! ~
- - C+ r$ D/ ^2 \; M" x# c
- da = (g) => {//底图绘制
; l5 m2 |0 b5 w6 }$ [3 L1 u - g.setColor(Color.BLACK);
0 y( _: m7 ~/ F% M - g.fillRect(0, 0, 400, 400);
% h; e( o0 R8 K - }' ~2 P' q/ y# Q5 A% |! q
( b5 }+ R, L' p. B) k" M) K- db = (g) => {//上层绘制
. Z; y* E- s0 m6 q4 A# G+ s# c, [ - g.setColor(Color.WHITE);2 H: Y+ |+ x+ y. ^* Y4 A
- g.fillRect(0, 0, 400, 400);, F8 a+ F- B, B9 D# r/ E
- g.setColor(Color.RED);
+ b' V$ R! x# h! a6 }3 q - g.setFont(font0);8 b/ f6 w) [& k. I9 S" ^# ?0 p
- let str = "晴纱是男娘";
7 K# E( |$ k, W - let ww = 400;
@4 ^% ?9 {; u' J m6 C8 O2 H - let w = getW(str, font0);7 ?& U% W" D# G/ X( o; d# E, G* W% @
- g.drawString(str, ww / 2 - w / 2, 200);4 H6 T4 U: N* f4 [8 V8 F, R
- }; w, W; E6 M1 q: }
- # h j: K9 X0 N0 X7 u \
- const mat = new Matrices();% }, S& h. d1 b) \
- mat.translate(0, 0.5, 0);* Q, i: ~, L: a9 k
5 e' O3 `$ {, |* l) s5 N; Z$ B- function create(ctx, state, entity) {' x* t5 F" d4 K7 z( |( q
- let info = {
3 t9 v) _8 z. Y: a, i& N" X - ctx: ctx,, r7 B3 d: r% J: ~' h* u6 G5 b
- isTrain: false,
$ f: p( i. s' I, K7 ~0 Q- {+ r& E - matrices: [mat],
5 \* c# ?) s h9 E+ M+ f - texture: [400, 400],
& j& i) K1 M0 O; | - model: {
% l: `* B# N) u0 |3 z& } - renderType: "light",
8 I' o* Z8 ?9 \3 v) A* d2 e - size: [1, 1],
@# G; v/ P9 H3 C& y - uvSize: [1, 1]
( N5 _& y( t$ B' e: M, w l# s - }( N! k8 u n; {& ^, m
- }
) E% @: p: h$ m1 d9 _* I1 t) C% y - let f = new Face(info);
$ _/ [* F& p( ?% l3 [! h& V - state.f = f;
+ p! Q3 x) b% ^- y - $ g& l" F# u# f, c( B
- let t = f.texture;
4 Q& I, d" s1 J6 t - let g = t.graphics;
# h1 p* S+ s% O0 c - state.running = true;5 R$ V9 H7 o( m
- let fps = 24;, T( C. R) A( k- x
- da(g);//绘制底图
/ B2 g. ]8 Z( P - t.upload();
: P' f; `& T5 Q; f8 \1 | - let k = 0; v$ h9 o4 {% L' a; q, |
- let ti = Date.now();8 Z3 r# w5 J6 m6 Y% e( W% ~
- let rt = 0;
5 J3 [9 F3 B. C) R; V* ~6 j4 ^& r m - smooth = (k, v) => {// 平滑变化
% h) J5 p0 P4 ]4 w - if (v > k) return k;. b& v3 W1 x" F
- if (k < 0) return 0;
- o* q4 ~! t6 `5 ]% q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
) p, @5 F6 G& o$ X; z# e6 d, O' \ ]1 l - }! x' i5 d/ t8 V. {
- run = () => {// 新线程" G! h# y" b$ h6 }9 r; G: M, v
- let id = Thread.currentThread().getId();
6 s5 u# z0 w- r3 I2 w. ^( Y - print("Thread start:" + id);1 l8 G c( c& `
- while (state.running) {
) Y0 H4 Y0 n! x - try {
8 \* q2 `+ x' ~+ ~ n - k += (Date.now() - ti) / 1000 * 0.2;
% ?# w; p; W- { - ti = Date.now();6 L1 z1 w. ]% f8 r
- if (k > 1.5) {( {9 k! h: F. s
- k = 0;
5 K5 U* b- U; L* M - }
- i1 B4 H, o3 S- w, R @$ S - setComp(g, 1);5 i+ M7 U) F9 n" V7 x M; m% m
- da(g); L/ a3 [( ^2 R- X$ J$ Y5 b
- let kk = smooth(1, k);//平滑切换透明度, d9 Q x- C. @5 M9 C. ]( e
- setComp(g, kk); @. h/ Q# y! o* B" J
- db(g);
& G9 u' F6 Y8 g. _4 J' }1 i - t.upload();
1 M" q- u7 x8 W9 q4 r) v6 B/ C: U - ctx.setDebugInfo("rt" ,Date.now() - ti);# }% B, T K+ O- ^) V
- ctx.setDebugInfo("k", k);
/ j" p8 P: z" G6 ]7 Q6 o5 a5 e - ctx.setDebugInfo("sm", kk);
/ h: O& m0 e! J7 \- P* ?+ Z - rt = Date.now() - ti;1 r) E% Q* y3 `- R
- Thread.sleep(ck(rt - 1000 / fps));2 b/ K/ |3 r" T6 _
- ctx.setDebugInfo("error", 0)) h9 @4 }2 V0 Y7 _5 f( Y8 D
- } catch (e) {
9 c7 o$ y4 t: f# U U, H - ctx.setDebugInfo("error", e);. b5 J: Y! c# j( H4 Z& E* O
- }$ c& E" `2 r( V# l
- }
4 b6 p1 k4 E9 G - print("Thread end:" + id);
1 R& Y5 M. t2 s: h3 J4 P( ] - }
1 ], S7 o) n+ K4 K- | - let th = new Thread(run, "qiehuan");/ h( C9 k( b# _7 D* k1 G( S2 [
- th.start();
& w( P) v" h9 f* E9 Y" |( i: B o$ z - }
. ]) d+ I; C' P0 d1 X& e! Y( h; k& O
" n# C6 \5 Z) O: R$ f/ c- function render(ctx, state, entity) {
" u. w& r0 ]7 Y0 s% Y7 m8 e) z - state.f.tick();2 |! Z! E) |/ S2 a7 b% g. \
- }
% c( p) E, n/ B6 B U
2 t' ?8 c6 P# B7 ~, ]- function dispose(ctx, state, entity) {
0 @: H4 [& U2 g5 {' Z/ x - print("Dispose");
$ e! R; z e# ` - state.running = false;+ R8 S- I3 j) ^. K) o- K
- state.f.close();
9 J6 E$ ?9 x2 ~- R, W - }
0 N5 v j2 X5 y9 Z; n, q
1 o1 k# Z5 q$ Q7 u+ h' X- function setComp(g, value) {
# e5 ]. ^$ B& v2 J4 J0 d7 G - g.setComposite(AlphaComposite.SrcOver.derive(value));
8 Z: u- K. D: ^8 [# S - }
复制代码 & O7 ^8 B7 F/ u; g5 j5 ?
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。: m/ {9 h* R- q$ L
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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)
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