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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。
# A4 t" l1 L8 r% D e- importPackage (java.lang);5 A2 H! A( X% _/ J; n
- importPackage (java.awt);
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% d. ]) P7 k r2 M$ H- include(Resources.id("mtrsteamloco:library/code/face.js"));! q" m4 v, _3 s2 ~6 C m" R
- 5 C& z M: D9 _
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
# A- i& {4 d# p$ |( o - let frc = Resources.getFontRenderContext();9 `9 c% T# _$ P" b1 C! q- O
- bounds = font.getStringBounds(str, frc);
! Z3 r7 f* E# c$ I1 J - return Math.ceil(bounds.getWidth());2 W. g1 W4 k& G8 c5 i% B% c" z
- }# ~, h. t2 ~4 D9 ~4 _+ H" m
3 A* A0 @, l. ~+ O% N- da = (g) => {//底图绘制
% `* j$ K% b9 ^* n$ { - g.setColor(Color.BLACK);
% D/ c4 h2 v* m - g.fillRect(0, 0, 400, 400);: X" `( t" P+ ?- y0 f6 e) u
- }1 O9 h; W( O L# E3 u
- 3 U ?* I8 c4 J0 a
- db = (g) => {//上层绘制# w$ s1 H+ B5 L3 E+ {5 q8 t
- g.setColor(Color.WHITE);. K8 n- [* v2 l: H( g7 _% Q$ l0 s5 s
- g.fillRect(0, 0, 400, 400);
& |) K3 Z/ g2 w6 M: { - g.setColor(Color.RED);
. {% p, n) {; h" d5 I) ] - g.setFont(font0);) q, I0 b" _! [+ u2 ]
- let str = "晴纱是男娘"; N k7 O3 N& a* Y" N" ~8 R
- let ww = 400;
/ C( [% O# j+ O5 V0 _ - let w = getW(str, font0);
) S u; [3 r9 O; m) k$ J$ Y - g.drawString(str, ww / 2 - w / 2, 200);, k7 a. F- `3 a0 N |0 A/ d- r& K
- }6 g7 h+ Q* P8 a
% S% |) V* S ^* j0 H9 L7 D" g- const mat = new Matrices();
* a' j; N; Z2 T. x4 q( [) _2 b - mat.translate(0, 0.5, 0);
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7 g( S6 `! w7 \6 ~; g# {6 S- function create(ctx, state, entity) {4 r- a2 x q8 x: h# c
- let info = {( E/ k) |* P1 d) L
- ctx: ctx,
2 A3 u+ J4 R1 T! |& } - isTrain: false,
1 i* g$ ]/ x) k" M - matrices: [mat],) {# Z; \+ ?' F7 |' i) C) a
- texture: [400, 400], H& Z7 o/ G2 _# t
- model: {" ?0 g* ], U" J0 n3 l4 S
- renderType: "light",3 T+ L. t! F! A
- size: [1, 1],
* I; `! t$ O7 `; q - uvSize: [1, 1]
- [# `" T1 K3 i+ E; U; p1 J - }9 H9 H2 E4 }: w" i
- }* J8 r2 Y: F+ ^
- let f = new Face(info);
+ l' `6 w5 l0 |( _$ V) U- [ - state.f = f;/ H- _8 i c% o$ r! H7 i) t
- * O0 i. }, [- `6 p2 }6 e# B' X
- let t = f.texture;* E0 j: Q5 H7 |/ P& f
- let g = t.graphics;6 B+ _# z1 x& I
- state.running = true;/ Y: L" g# `9 G
- let fps = 24;
; l, _! {' ]# t+ G% Y7 W' }8 B j - da(g);//绘制底图8 S4 d+ ^9 y- Y7 v& V J7 n& _
- t.upload();) J L* P2 m/ f+ z: G5 L% ]! q
- let k = 0;* v7 S r; m9 r; F" o! T1 \& R
- let ti = Date.now();+ z' c3 A- R% V9 b3 u. g# Q+ r' E4 A
- let rt = 0;
( k, Y O3 c' [5 M5 Z. q - smooth = (k, v) => {// 平滑变化
6 q- m' f; x" X! @+ ^3 A0 O0 U$ h - if (v > k) return k;! }3 u0 y. O" `* c
- if (k < 0) return 0;( T2 o4 U) _4 s3 r* S5 N( F7 i
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
+ Q& Y- q% y* _* v: L& d( Z g - }
% L, s" G% r" }% p# _ - run = () => {// 新线程' z" f7 |( }, ?6 }$ y5 W: D4 A
- let id = Thread.currentThread().getId();' | K3 V! E8 N3 C; y
- print("Thread start:" + id);
, J+ ^! ]4 k2 A2 W1 X, b: d. X - while (state.running) {
7 T' K. g6 C# A a" ` - try {" x. q0 z5 {/ z% v! w" q% c0 \
- k += (Date.now() - ti) / 1000 * 0.2;
: K# a" H# Z6 E( j, X+ W& V0 [ - ti = Date.now();% P+ {* x9 e: h4 Q7 [: V. d% p1 l
- if (k > 1.5) {" e) Y& F: [& o$ O4 W4 L' G7 {
- k = 0;
) s. D5 Z4 H2 }% }6 ~& D) B - }
3 _ l6 i. G7 U$ a8 @+ _" `! b - setComp(g, 1);9 c) Q V: @5 m* n J+ X. n
- da(g);9 K6 o Q |0 }
- let kk = smooth(1, k);//平滑切换透明度( a- }( m, L# B$ E: F6 {8 S0 S7 V
- setComp(g, kk);6 |8 J) D" Q2 T- J7 f; _
- db(g);
& p4 V. O" k: t. b - t.upload();! ^6 h8 M& b# Z$ o! U
- ctx.setDebugInfo("rt" ,Date.now() - ti);: N+ V1 M0 g5 T( P' g/ Y
- ctx.setDebugInfo("k", k);% [( u! d+ K0 v0 C/ s0 J# m
- ctx.setDebugInfo("sm", kk);9 I: P2 R& w, w1 e
- rt = Date.now() - ti;
) X4 _% M) W& L0 t/ Q1 K# b - Thread.sleep(ck(rt - 1000 / fps));/ j* k) M3 b; ?4 C) k8 T
- ctx.setDebugInfo("error", 0)
# a" R: D5 x9 Y) D9 O - } catch (e) {+ ^8 c8 G/ m" H/ X, Z9 V% o
- ctx.setDebugInfo("error", e);
( p3 |& |! q, g" w- b- c+ y$ e - }
) \6 A7 O0 N; U - }
0 H. ~$ ]9 K! z0 {( y - print("Thread end:" + id);0 v* q; Q3 E' V! b9 U9 P& @0 q* s
- }& J' f* j" m+ L
- let th = new Thread(run, "qiehuan");
3 G) \3 H5 w4 g0 V2 e. d( [- m - th.start();% m' }- j9 C3 v0 G3 L
- }
! N7 d$ o" z2 x2 x- Y
2 e8 Y Z4 j* ]. l5 E( r- function render(ctx, state, entity) {
% L1 V4 m8 R& Z6 c - state.f.tick();1 K8 a; }; {% v4 w* y+ {- C9 |4 P
- }7 Y9 F6 T% f4 H" R/ y
8 k I/ v5 ]4 W. ~1 a' Q* a. {- function dispose(ctx, state, entity) {( H4 c9 S+ \, i" Q. `
- print("Dispose");
% U+ T4 o5 C7 E2 P4 p- n. z$ U" ~2 N - state.running = false; L4 _$ {4 A+ t
- state.f.close();8 Y2 s0 F7 J" h: a6 _7 j
- }
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- function setComp(g, value) {
& C2 ^- E5 u8 v - g.setComposite(AlphaComposite.SrcOver.derive(value));9 W( M x7 M/ }. I4 i
- }
复制代码 ) h; C) ]1 t: Y9 y4 q! F6 O
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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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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