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4 q7 A' N4 m8 W3 q8 C& ^# q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。+ l% Y6 G( l: U- T# c
- importPackage (java.lang);7 I+ o1 C8 L2 w- R3 V& {
- importPackage (java.awt);( I7 R9 _- Q: ?2 C. l
; }# m2 ^$ g$ j" i- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {5 Q# v! S! w& v1 m3 r8 q. |
- let frc = Resources.getFontRenderContext();: Y9 S9 G+ L/ C V7 a& e) v
- bounds = font.getStringBounds(str, frc);( g8 O; Q4 `1 u2 g
- return Math.ceil(bounds.getWidth());
- K. A9 W) _1 V; ?: r S& k - }3 f% N( y- j, a" B6 q$ D) T
- + i W! U$ ]1 ^% T' @% P2 K
- da = (g) => {//底图绘制" C3 S: H. o) b. W2 W2 Y% C& m
- g.setColor(Color.BLACK);+ ]0 e C4 `; Z$ \4 M2 b9 j5 X0 S' n
- g.fillRect(0, 0, 400, 400);* \0 W! l' `7 z. v7 A2 m2 I5 A
- }' ^3 N. S- r* p: Y4 j8 a
2 t0 Q1 K- G0 U- p1 @- db = (g) => {//上层绘制
1 B. S& z* v, y6 _ - g.setColor(Color.WHITE);
) ^8 }$ c! b& D" B! x8 |! n# ?( \ - g.fillRect(0, 0, 400, 400);; \) `3 R" p0 P. s" \, s8 |/ T
- g.setColor(Color.RED);
. n& \- v( o4 G1 @2 w! n0 R: v' R - g.setFont(font0);
+ x% {: J( ^3 E$ B" i6 s - let str = "晴纱是男娘";& D5 k9 N; j$ s- X% ^; j
- let ww = 400;
: x1 V3 O$ }- d" S+ ` - let w = getW(str, font0);# N1 c) T8 V4 P. {( L
- g.drawString(str, ww / 2 - w / 2, 200);
- Y) n/ m. j: y) C% O - }
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- const mat = new Matrices();0 j' h) z5 X2 c% d$ w' [' R
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {+ o2 c F1 a* C& r6 A4 ~2 _
- let info = {5 h8 u) J0 J# h5 E
- ctx: ctx,$ _! q( W7 J& q' X3 A9 m4 o5 j
- isTrain: false,7 _* `( X% e* F2 q
- matrices: [mat],
; [3 g: Y& J u0 K& d - texture: [400, 400],
) S" j' M9 ?/ I4 H7 r - model: {' ?7 ~: E9 S2 R$ s) z* q3 K2 a
- renderType: "light",
# G# W. @3 E+ J4 H0 f - size: [1, 1],9 l+ ]3 @$ _; z
- uvSize: [1, 1]
% d7 j# ]* b+ G: Q1 n3 [9 f - }
9 |( C. t3 A4 }. p# G - }" x I h b$ a3 V- e& w+ m# _$ G# N
- let f = new Face(info);3 ]+ N" a. T0 `& I
- state.f = f;) Z- Y0 v/ S& F# V
- " o7 ^5 U8 u# T D/ ~5 d9 Q
- let t = f.texture;( Y) J1 \" r' Y: F8 e
- let g = t.graphics;
+ U. h/ R; c2 [4 X - state.running = true;
, E+ y4 O5 }$ {5 u+ { - let fps = 24;
+ A& }7 F: ]* n$ y - da(g);//绘制底图& `, M1 B3 h+ E2 u
- t.upload();2 I9 g" n- {& v% j( X
- let k = 0;' Y! z- B6 l6 b& t' I9 F
- let ti = Date.now();7 Q6 W1 s+ d) W5 B+ Y
- let rt = 0;
$ f4 J0 N3 ^- I* d! m+ ^ - smooth = (k, v) => {// 平滑变化
. O* {' S5 C6 @9 P' l* J - if (v > k) return k;7 p& ]8 \: P* E4 L& T( h7 h
- if (k < 0) return 0;
7 U! E; j. b0 S% M) N; a. C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% K: j `6 e6 A" \ g' ~! @2 v
- }4 W# W; H5 D+ P) @* y! g8 _ L
- run = () => {// 新线程0 R5 v4 _+ i$ @+ O3 K. _
- let id = Thread.currentThread().getId();
3 F5 G4 x: R% c% Y% E2 F. k4 x! v - print("Thread start:" + id);
; d0 d2 t! y' V) t1 u - while (state.running) {
$ ^3 b _/ T8 K2 h0 W0 [ i' c - try {
: q( r3 W" p' f! B; V/ t - k += (Date.now() - ti) / 1000 * 0.2;
" k% D# ~/ W# _- |& l3 U$ V - ti = Date.now();1 w* h% j Y% {. e2 w, V4 Q
- if (k > 1.5) {
9 N) G( J6 L) I U1 i5 D - k = 0;. S N' m+ t: \3 ~! r! g8 c' @& U; L
- }7 D1 u( z$ v$ G$ t
- setComp(g, 1); @9 I- o4 P. i% i5 |0 `9 F
- da(g);5 l1 n( p& ]9 Y
- let kk = smooth(1, k);//平滑切换透明度
: `! w, ?, T' [8 K: N: Y - setComp(g, kk);9 r e( P' H7 J
- db(g);
n' k/ b' H: E+ K* { - t.upload();
, Q% V0 J3 n5 F, N/ y - ctx.setDebugInfo("rt" ,Date.now() - ti);. J: Z, p+ L2 x5 j9 \1 O. x+ I
- ctx.setDebugInfo("k", k);
1 o# l) k6 u3 d5 ?: y u( s - ctx.setDebugInfo("sm", kk);
0 V1 A, Y- i1 @8 q; t2 C. ? - rt = Date.now() - ti;, {$ g( H0 C% O3 R6 b( O
- Thread.sleep(ck(rt - 1000 / fps));
! I ]1 U7 J! k0 A+ ]4 T; C - ctx.setDebugInfo("error", 0)( t3 W/ m- _4 z C9 I8 n5 j
- } catch (e) {
8 H6 q/ P% X' X, J - ctx.setDebugInfo("error", e);" l+ o# ~5 \2 ~* Z- L% F1 [
- }( b3 T" A" r' F" E, ~4 u
- }4 Z6 C; k, O' S* L8 j# a" i1 f
- print("Thread end:" + id);
. ~9 d; }3 N* G! t4 f7 x/ @ - }* S- b7 q+ j4 ?
- let th = new Thread(run, "qiehuan");
- x9 }& r: s7 ~9 C; t- ] - th.start();
9 i( }, I7 Q" k: m& b1 d - }
" C3 s: H' |9 K
5 _. E& c/ y! v- n- function render(ctx, state, entity) {! Z/ a$ P7 e5 D1 h- h. c( j
- state.f.tick();! k& t1 H) c& Q% Y3 B" t' c7 R9 j
- }$ c5 u4 J" F' j# U: C
2 b8 z3 V+ F# c% N/ s3 D- function dispose(ctx, state, entity) {
( N4 c* q( |: V: ]0 n, S" l( i - print("Dispose");
8 b$ J5 J1 G( C4 ^9 ?6 ]1 O - state.running = false;
$ P& T. D1 z/ C/ H) |9 ~5 g+ E - state.f.close();2 {" A. g9 W1 v3 m
- }& ^; ` H# w. U8 X% p2 O
( {& Q! I5 g5 r5 P- function setComp(g, value) {
! I: f1 c* Y; y3 j; f Z - g.setComposite(AlphaComposite.SrcOver.derive(value));
4 e) o' w! c1 A - }
复制代码 ( F# m$ I9 _: p. ]+ d/ J
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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8 z5 x# F1 k1 ^顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)% V3 C) u- u6 K+ x# R' [
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