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' Q" }, e1 x4 v1 z3 w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。
; m! y, v$ J1 ]2 T$ o- importPackage (java.lang);
& O. r" a* \, |) }& r6 `. i# ^ - importPackage (java.awt);
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& A6 B M; U) U; T8 e& J- include(Resources.id("mtrsteamloco:library/code/face.js"));' Z" E" L) ?2 h+ F7 M
* [0 s) C- ~- H' ^" U& ]1 `- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& w: z7 A" }6 C5 c6 e
! z J4 H+ S9 h! M; F: \- function getW(str, font) {
: M# g8 R0 a2 i# P - let frc = Resources.getFontRenderContext();. v6 c* p0 C" H k; d0 b" ~# @
- bounds = font.getStringBounds(str, frc);+ c) t5 d1 R. i+ Q3 t
- return Math.ceil(bounds.getWidth());
l* O- f, C1 f. f! c q - }
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: [: h3 A* B% v* X0 n- da = (g) => {//底图绘制
) j# b1 W& I5 ?) x, x% f - g.setColor(Color.BLACK);
1 S* O4 X5 q" w$ k$ | - g.fillRect(0, 0, 400, 400);: r" [8 @$ N& P7 N& K
- }
9 ]. f& k0 u- k3 @
/ r# Z! P4 g8 J# w' ^$ e, K3 i- db = (g) => {//上层绘制
6 [! I H% u8 [; t+ Y J - g.setColor(Color.WHITE);
' F6 x8 g! Y W# X2 w& O( _" m' b - g.fillRect(0, 0, 400, 400);+ J- w: x) }8 |* w) d$ |' n" ]
- g.setColor(Color.RED);/ t ~! O" ]4 C6 V
- g.setFont(font0);
7 x% f/ I" ^ t: F - let str = "晴纱是男娘";
. o7 f' s0 a* e, F4 G% p+ ] - let ww = 400;
/ S. s: P9 C; V - let w = getW(str, font0);. Y; z5 L k2 _% U, Y2 P
- g.drawString(str, ww / 2 - w / 2, 200);
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( M0 f: n, h8 C* ?, D- s- const mat = new Matrices();
7 { B/ d) a2 a: Z - mat.translate(0, 0.5, 0);/ e6 M! S$ d& o9 [# X' V+ ~
8 ~* W; l, ?+ l1 e- |4 M8 }/ {+ O7 R; @- function create(ctx, state, entity) {3 D3 p( u& k. n& k
- let info = {+ c2 t. D) U( w* N
- ctx: ctx,
7 t; F: M0 R$ |- E8 U( | - isTrain: false,
; [( X, F9 j4 v2 _# P - matrices: [mat],* A' r! b+ k$ i* q0 u8 i
- texture: [400, 400],
" p+ R$ J/ i0 b( O! v9 M4 M - model: {/ d. M0 E% W1 R& n% T
- renderType: "light",$ w9 h: n# W: G
- size: [1, 1],
2 `8 h$ d7 t5 f* a) w" r% E - uvSize: [1, 1]. v* V% X3 b9 y' c& x6 \
- }
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- let f = new Face(info);- I, F3 X; o6 |% E% [7 _) y
- state.f = f;
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! n& S/ q7 I$ a0 ?! C+ S, W- let t = f.texture;; J, }; O. ]: {3 k1 Q B
- let g = t.graphics;1 y3 B! ^ R3 c1 G" J2 u- v* i- h9 y
- state.running = true;
! g' N: z U2 ?! Q - let fps = 24;# Q# u% E- c% g
- da(g);//绘制底图
! }1 t, V( c! `6 s$ E - t.upload();3 h+ v, ?4 p4 J; F3 e$ j
- let k = 0;2 r7 N3 A1 e9 w
- let ti = Date.now();& o- O+ G/ c! {1 i: d9 ~
- let rt = 0;. s3 e0 \" \; e
- smooth = (k, v) => {// 平滑变化7 }, a; q6 c- {0 L$ L8 b1 W$ B
- if (v > k) return k;
! u' k% b9 H8 O0 }0 I - if (k < 0) return 0;! @7 \8 W8 M& z2 n
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程# G& D( d' \2 T z' a
- let id = Thread.currentThread().getId();3 H0 b- i8 h- a& B ]4 H
- print("Thread start:" + id);) c* d4 i. g4 c [+ d# \4 H
- while (state.running) {7 n; M" [8 Q1 `5 \- c3 V
- try {
) m F/ v+ `4 G2 J |' o q- F - k += (Date.now() - ti) / 1000 * 0.2;
6 j7 z9 c$ R7 R# ` - ti = Date.now();
/ a+ h9 ]9 g2 T! U( u - if (k > 1.5) {
# H' p4 R& W" z: z k/ k - k = 0;; l1 D$ M# _; v5 u$ l" E m
- }
( _4 l1 k' H$ J- R$ k! }3 J7 j - setComp(g, 1);& ?( x% P: _4 k2 L3 H
- da(g);
9 h4 S8 X, F5 W$ Z: @+ N8 N# V - let kk = smooth(1, k);//平滑切换透明度
+ V+ j& o, \8 Y* \" m5 N; u - setComp(g, kk);
) W, X7 n1 \, V9 A2 J% U5 ~ - db(g);4 }: W% b4 M* L5 u! I9 S. p
- t.upload();9 g0 ~! w; k3 g
- ctx.setDebugInfo("rt" ,Date.now() - ti);% d w0 E0 _& i& `+ U
- ctx.setDebugInfo("k", k);3 s. D' g. ^2 `* A2 Z
- ctx.setDebugInfo("sm", kk);3 b0 h4 I& X8 D
- rt = Date.now() - ti;' H- G8 {9 K0 j0 ^- M; H
- Thread.sleep(ck(rt - 1000 / fps));
4 `4 ~" i" m$ k' O* F - ctx.setDebugInfo("error", 0)
+ R C+ n6 |: m5 |$ e) f - } catch (e) {" C5 g% S5 ?0 n! W x9 l, J
- ctx.setDebugInfo("error", e);
" R3 z! @) {' I, n' L2 k- F - }
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- print("Thread end:" + id);
; A# @2 \3 @5 y" g+ J3 c- P - }
: h: X3 j8 k ~+ o9 M9 U+ ^* j - let th = new Thread(run, "qiehuan");3 z9 I. i: Z5 d
- th.start();- H, d1 P# B! A Y
- }
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7 w4 O3 m+ O8 x3 I- function render(ctx, state, entity) {) i$ F/ L8 Q: j
- state.f.tick();. v# T/ X/ ?# S+ i2 r% E
- }$ ^/ q/ \' d1 ~6 Y& J& e9 X
4 ~! X3 l* e- u4 L- n7 W$ E- function dispose(ctx, state, entity) {
8 V/ n5 p- l& m; r2 O1 f - print("Dispose");! I2 z1 ]/ G/ B' J' @. F
- state.running = false;
. s, ]* ^" ~# a; A - state.f.close();6 |4 M+ f% y9 U1 j
- }/ P5 q1 X1 f8 A' n
- $ b9 j) ~- b3 F! E, P/ o. w" x7 X* k
- function setComp(g, value) {( L7 r/ g) U# H0 t0 z7 M4 p
- g.setComposite(AlphaComposite.SrcOver.derive(value));, E7 E0 D# D5 E) p( X
- }
复制代码 " O" V% V+ g0 t9 c% l' M% l5 D( 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)9 H6 e' k, y& s+ e/ e
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