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$ A: d" z+ n1 S( O! P. y. ?( B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。
0 N$ m8 N( A) k- importPackage (java.lang);
7 s; c: [" `+ \3 j( z2 P4 [ - importPackage (java.awt);
5 d; K! p8 A4 m) q! V - # t# G. b! B" x* U/ e" a
- include(Resources.id("mtrsteamloco:library/code/face.js"));! j2 S7 O" R& R6 M/ Z( q- R
+ u: ^' q; N. d) T" p; G- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);' `5 X" }. n ~$ H3 C
_* o& t5 D' s9 ~ I- function getW(str, font) {7 J) y4 ]5 Q. n' U" u
- let frc = Resources.getFontRenderContext();
9 i. P: ^4 J% _( y+ z7 {' j - bounds = font.getStringBounds(str, frc);
8 b( e( z2 o5 D2 m. ` - return Math.ceil(bounds.getWidth());
- H+ x: P) Z. v9 d2 h( v; o - }
+ g. j& c$ T. | - - c9 c5 i: D" a* q$ D# N. L# Q- U& s
- da = (g) => {//底图绘制1 Q2 Y% ]. p \, c. F( j" f
- g.setColor(Color.BLACK);
& R9 L' x5 e) W; M - g.fillRect(0, 0, 400, 400);) e& y$ M% N+ u* A; P
- }' U; z7 Y5 A. A: o: _- {
- ! ?/ s' d/ ~# {+ z. ]
- db = (g) => {//上层绘制
9 e) z* V0 O, _* i9 C - g.setColor(Color.WHITE);4 W+ A. \8 t$ \/ m/ ]7 {. R5 x' o
- g.fillRect(0, 0, 400, 400);
+ m7 V7 R* ?% p: Q9 K4 b - g.setColor(Color.RED);
% j! {6 k4 q" } - g.setFont(font0);
" D7 n3 z$ _0 a0 n4 q! Y9 Y' u, l - let str = "晴纱是男娘";
/ u, U8 a' d$ \- U% k0 Q9 w - let ww = 400;
1 _+ A' D: V2 }' N+ D6 [4 a - let w = getW(str, font0);" j& U' ?+ K3 z }0 L
- g.drawString(str, ww / 2 - w / 2, 200);
: E. q2 ?- K+ K! s4 x/ U - }
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0 l; Y9 e! M# a: L% ]# k- const mat = new Matrices();% i8 B+ N+ K! X. Q/ A
- mat.translate(0, 0.5, 0);
- |7 U5 f$ C" s2 q& r: Z X - {8 x( N, O; @. ^
- function create(ctx, state, entity) {
$ n% R; q' o6 R - let info = {8 z6 ~3 N7 q: ]) o) B1 u
- ctx: ctx,3 A/ j$ Z+ V9 z6 l# ]
- isTrain: false,2 J7 E" H7 W5 a& O4 A5 ~- a6 e
- matrices: [mat],
, a. V- R# @, V8 } - texture: [400, 400],; M1 @/ a+ L6 _: ]9 a9 H% d y# P
- model: {
! U* [" h ?. B! J9 a2 j - renderType: "light", |3 O* B. Z3 _1 J1 n
- size: [1, 1],
8 [. U! b0 n3 ]2 ^) H8 U - uvSize: [1, 1]7 g& v8 G& {+ G5 E8 |
- }+ Q& h1 w% K/ ^7 Q
- }
/ N4 { \ F) H% b6 _ - let f = new Face(info);5 d# q$ X' Z' v& o! @( N5 V
- state.f = f;9 S) b/ F% w( F7 M9 T! {
6 i; g& l! Q) D0 L- let t = f.texture;) d- A, l( k+ Z" y J: P8 S
- let g = t.graphics;4 [5 W+ V: A8 @; i. M. _ D. U
- state.running = true;
5 J. J: N$ V9 k% [) j - let fps = 24;
/ ]8 S8 c' R% L; T - da(g);//绘制底图1 t. Q7 E* z: U! S
- t.upload();; D7 u8 s7 S# r/ N( m1 H
- let k = 0;
" o/ F8 s0 l0 M - let ti = Date.now();% e& L& N0 P. R8 p, g
- let rt = 0;
0 B; G; b; Y6 Q E+ Q' [ v - smooth = (k, v) => {// 平滑变化. [; l! x; m) g
- if (v > k) return k;8 B9 D) J, O: M- H8 R# c0 Q
- if (k < 0) return 0;5 d& u. }9 N9 q& R' {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 _1 r# O" y! k) j0 P" K
- }$ S7 Q# N$ h5 `! |
- run = () => {// 新线程
" _7 K0 G3 s; Y8 p: H2 Z2 J - let id = Thread.currentThread().getId();
$ B; F5 L3 R2 q8 `" X/ j - print("Thread start:" + id);
% p \* p( {0 x" f7 O( u - while (state.running) {
: `; V; i- I0 T4 Q4 o: c. @; ~( P - try {
0 M0 Z- D, x9 k5 ?2 ]8 Z0 e& }1 M - k += (Date.now() - ti) / 1000 * 0.2;3 X, e0 D( G" d1 H3 g5 W' F
- ti = Date.now();: I5 [4 A4 D' r: [$ \. s+ \
- if (k > 1.5) {
' Q6 g& `& A$ D9 z( ]) s' r- { - k = 0;% d8 w5 s8 y4 L8 z# A4 Y c
- }' Z* g+ ~5 M- o# F/ x T2 r% J
- setComp(g, 1);
f; H8 w. _0 T7 r6 G4 b - da(g);
- m) G, }. n$ v- T% k - let kk = smooth(1, k);//平滑切换透明度0 c; l% x. e: `% N) @
- setComp(g, kk);9 m% `" ^0 o! D" }
- db(g);- H+ R" |6 ?8 A6 g1 O0 g _
- t.upload();
/ L- `* N4 m$ ] - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 Q* R7 V: Y ?$ A - ctx.setDebugInfo("k", k);. G. [3 u+ _2 d" h6 ~8 `
- ctx.setDebugInfo("sm", kk);
/ K: p0 C( ~; Q7 T0 b7 C W9 i% e: b - rt = Date.now() - ti;
& n" v1 C. ~% w: [5 l1 a) ]: O) B7 ? - Thread.sleep(ck(rt - 1000 / fps));
4 j6 K7 ]* `9 l - ctx.setDebugInfo("error", 0)1 ]' c' m* a7 F! B, r: q
- } catch (e) {. h' t+ H; o8 U( D( ~2 d# ~
- ctx.setDebugInfo("error", e);3 w, L( M1 C1 `! L9 r, k0 B
- }
& }# ?8 r& S9 Q; J" K, s0 B - }
+ d* o$ g7 `% _3 x0 W: t ^ - print("Thread end:" + id);* G R: D9 i) i3 A
- }
2 K' r/ `! q; T - let th = new Thread(run, "qiehuan");$ g' G3 I$ ]' |6 U! U
- th.start();( \# R. \( D1 ~! F. J; r8 e
- }' A8 j1 p# D. ^$ o3 N
) Y/ k8 y+ y! K- K- function render(ctx, state, entity) {
8 e& G- v- {% C k, d - state.f.tick();$ _3 z9 g+ h: o; ?( h. ?
- }
& V! G0 D% ?1 D( u: `7 ^& h - ) L2 v! ?5 Y" I% X0 z4 R
- function dispose(ctx, state, entity) {
. p! k% x1 J7 `! G- F6 h, { - print("Dispose");
8 l0 g) x y: |# s/ q) e. d/ w - state.running = false;
9 l9 I- j$ [4 E1 D( n - state.f.close();$ S" Z m; X' Z% B( o. ~6 n) p* X# D0 p
- }
7 y: r4 p; d( K' M! ^
; H1 ] \! p+ v5 d- function setComp(g, value) {
# Z* P" f' Q1 s1 E* N. H! y - g.setComposite(AlphaComposite.SrcOver.derive(value));, d' a; \* Y5 W0 P; h
- }
复制代码 . [8 m: C% E% t
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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$ D" o; ^9 d. H0 H. y9 q9 e
$ X* @7 L' O4 a T$ q2 Y1 n6 k3 f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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