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/ O0 L% Y& p* G! {: D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。
3 ]+ s# ?- W% z' W- importPackage (java.lang);
1 _) q' `, u. }; X - importPackage (java.awt);' P$ D7 Y: J, R" g. W; Q
0 x+ S( e2 K: }1 y- include(Resources.id("mtrsteamloco:library/code/face.js"));! X. u. n5 H' p: t. c4 i
- : d. d% ]; b$ g- K; I. @
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* U3 a) I9 o- D# W7 u' p l
- 5 O) R' V5 h. {+ h! G
- function getW(str, font) {, \' w0 O3 j5 V: [" ]' N$ T
- let frc = Resources.getFontRenderContext();
/ X9 \3 W, n/ f7 M. ], @ - bounds = font.getStringBounds(str, frc);" C/ j1 ~3 x" \
- return Math.ceil(bounds.getWidth());. x* w6 E- y; I9 h) y; ?7 L" H
- }8 u+ B4 E$ T0 M5 M) c& J' D; V3 O
" Q7 _6 `( P! S1 [ u! n/ e% z- da = (g) => {//底图绘制) U2 E# ~9 Y# O2 T: G& u
- g.setColor(Color.BLACK);% }6 T5 L( Q- l$ _
- g.fillRect(0, 0, 400, 400);% s! E6 l7 |( Y1 I, w. s
- }
6 P1 o( J/ n9 X8 l - % Y! Q4 k- a! A% f4 @& u& e" p) A
- db = (g) => {//上层绘制
: Q( g. }2 J0 g; ~ - g.setColor(Color.WHITE);4 C/ B$ x- f% L$ V' Z8 W' m
- g.fillRect(0, 0, 400, 400);9 s" d r+ |4 u/ S, k
- g.setColor(Color.RED);
5 m) G2 i* U3 [* p# C9 k- P/ K6 N - g.setFont(font0);
- @! E" f ]4 N- D1 ~3 G) W - let str = "晴纱是男娘";- i6 y6 Z4 v1 K7 d4 b# T
- let ww = 400;
# k( j$ ]! K) T, |) V& h - let w = getW(str, font0);. \8 P2 m6 t$ ]
- g.drawString(str, ww / 2 - w / 2, 200);1 q4 l4 M6 T6 r+ ~
- }! D, b" g; i4 z P8 z( h1 P5 X
% _( `7 E2 D) [. b: P3 g- const mat = new Matrices();+ b) x0 a# a9 i
- mat.translate(0, 0.5, 0);3 N6 J- ] r1 m0 ?' X E! j8 B
- + ]% k L0 z9 P7 f% ]
- function create(ctx, state, entity) {
5 H' w8 H7 _* I3 u' H8 E3 J0 u - let info = {
; G6 Q, k; ?3 `4 t# u( c - ctx: ctx, l6 R* A" R9 e; l
- isTrain: false,
: q; u7 A l# T' [8 Q - matrices: [mat],
$ I7 {4 x) S3 m7 T - texture: [400, 400],8 b% F9 L) p. x1 n) f
- model: {: o% y6 T8 s: a1 t a; X7 V6 Q2 p8 r6 l
- renderType: "light",( A: `& A: j, ^1 _4 c
- size: [1, 1],
1 X, } R& @0 I' L h+ k - uvSize: [1, 1]
2 C5 |3 t2 d6 j: [+ u8 f - }
* ]- p4 P+ u1 o6 G" ~ - }
# ^: Y5 E6 y" c$ H# N9 c/ t2 ?3 ~ - let f = new Face(info);
0 N- k! I$ N; s3 o3 z - state.f = f;
; m+ G% A6 `/ T- \+ H
* C2 s! Q; _/ ^2 m7 z8 i2 I# n- let t = f.texture;6 z+ z5 u& p0 B- d: P
- let g = t.graphics;
* H/ u! a7 {! J7 f - state.running = true;
0 A: D6 |! @3 \8 u2 b2 T - let fps = 24;
7 @8 I/ Y, O: b( d2 h; R# r* D& j5 I - da(g);//绘制底图
- p' h$ L( _* {9 e - t.upload();
8 {+ U! z( I8 B% T - let k = 0;, {( l3 U1 `$ I7 e, }. z
- let ti = Date.now();
" c B) l1 Q& D/ m; R - let rt = 0;" f R8 w2 v4 W, o. Y
- smooth = (k, v) => {// 平滑变化2 X' k$ l- G% O; T
- if (v > k) return k;4 v2 i$ v- }# s5 k- N/ ^% Q5 D
- if (k < 0) return 0;
0 R' ^! d1 S3 K2 a - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) S/ R$ Q6 c) C' s
- }
J" I% s; l6 n( @; J6 s. p - run = () => {// 新线程
, W+ J E# U+ I) o - let id = Thread.currentThread().getId();
, Z0 T; |* _8 L; r' {7 Z) a - print("Thread start:" + id);. j4 W9 ^& N, w7 E A5 I5 [- V
- while (state.running) {6 U6 p5 _' C, [$ Y0 ?
- try {5 Q! C9 e; u8 i8 Z+ t
- k += (Date.now() - ti) / 1000 * 0.2;
: q& x- T* X1 h/ O: B2 A- U9 ] - ti = Date.now();. R* R- \( S5 D/ y( W
- if (k > 1.5) {
5 f3 B* O; C7 M# J% K - k = 0;3 T, A% @ n: V, r) ~
- }3 s- r) W+ }5 h( [6 N
- setComp(g, 1);
+ n8 F6 Z" S% j. O1 h( _: Z- f5 w - da(g);% w5 z8 g0 R4 V6 q u+ c; R8 g; P
- let kk = smooth(1, k);//平滑切换透明度
; `/ \* t: [" O8 V# T8 F) c - setComp(g, kk);5 d u* e, A( |8 k2 K' H L
- db(g);4 `$ J0 f0 Z0 U6 ^' Q+ J6 }
- t.upload();
+ t( g$ v% s4 w - ctx.setDebugInfo("rt" ,Date.now() - ti);" S4 J/ t. \0 x. p
- ctx.setDebugInfo("k", k);
! h* d. f4 \- q7 M B3 _0 L - ctx.setDebugInfo("sm", kk);
+ E' n" }( ?3 g/ J - rt = Date.now() - ti;6 F U$ R0 w) }$ O% A" s
- Thread.sleep(ck(rt - 1000 / fps));/ }- \( K6 ~( i, ?
- ctx.setDebugInfo("error", 0)
. p5 }( o5 J" q; ^) ^( \ - } catch (e) {1 I! t c7 Z( Y2 W0 ^3 C
- ctx.setDebugInfo("error", e);8 L. d' ]6 P. E! [, x, ^
- }. {0 F8 q& g- p& J8 _
- }
/ u. g* \2 z$ p6 z* \+ @" z - print("Thread end:" + id);7 x* x; B/ M4 T
- }
% v6 q+ Q! m" H# C; [ y& X7 r - let th = new Thread(run, "qiehuan");
9 Z! p. w3 Y8 z) t' L7 _3 ] - th.start();
3 F' _8 Q# n$ D$ r' a - }4 C0 T( z g3 ~2 T5 X% A) X% p: d7 K
- }) @% N! t2 j- function render(ctx, state, entity) {
- P% @' z! K; S7 _* J0 Y& M( I - state.f.tick();0 a" S& K) y% T+ I
- }- G1 w" R1 Q6 }
- . D' s0 C1 {3 E- \
- function dispose(ctx, state, entity) {
; B; D5 L' b6 _2 B; ^ - print("Dispose");
; m( m. h7 ?6 W0 p - state.running = false;, w6 z1 q! P/ n/ N6 I4 S: Z
- state.f.close();/ l9 ~9 ?* N# P7 w
- }
0 V9 e* @, W" u7 U5 n - , Y4 ?3 a7 i, s" p4 q
- function setComp(g, value) {% S( L% u& w: P8 v4 G& n5 ?
- g.setComposite(AlphaComposite.SrcOver.derive(value));% K0 K) Y1 o! D5 q- ?: J) N ?( \
- }
复制代码
) c8 A6 R1 O" @5 p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。' e _. E+ u# W( T4 b; Q2 Z ?
! o: N8 N3 b7 u7 m
$ Z1 J" b# u# }* @6 t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)' d" j- w9 g9 `! T
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