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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。
4 Q) v3 H% q% D3 Y) C- importPackage (java.lang);
, Q8 s- P# u! Z" W- y+ @ - importPackage (java.awt);
4 v6 ?7 d0 e, t, y& T - 5 h8 X) U/ ?" e" Z/ E: o. {
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 o9 g- D, i: q6 d! q1 c, d
5 X; O, y* q, H, r( ]( H- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
. n+ V4 Q! e9 m/ @9 B4 P: z6 T3 K
) N$ {& z0 H+ _. M, {# [- function getW(str, font) {/ t x5 F3 _* T7 b
- let frc = Resources.getFontRenderContext();
. a8 h$ O* E9 X* u. l- V+ j - bounds = font.getStringBounds(str, frc);
0 r$ ^# B0 X) u+ b- F# U2 a - return Math.ceil(bounds.getWidth());. k( X( N0 G$ X1 m, N1 v
- }! n: }' Z# m2 S# e
- 6 e% R9 P+ }* M; R4 z; r
- da = (g) => {//底图绘制/ `/ Q5 ^1 J# \6 A1 ?% @2 C3 g
- g.setColor(Color.BLACK);
( \: h8 L$ H' S) r* _ - g.fillRect(0, 0, 400, 400);
) W( b% ]1 N( q9 i - }5 z( ~. B( y4 N; \; B! u
7 n! g/ F- i# n" {6 ^) [! S- db = (g) => {//上层绘制
( s' t& R x" g - g.setColor(Color.WHITE);/ n* S) N2 w/ V( {3 R. Q0 y& E' e
- g.fillRect(0, 0, 400, 400);
) `3 l* m5 `) Z - g.setColor(Color.RED);
- S. ^ a0 F/ D! U5 v - g.setFont(font0);" ~5 R3 X& B! S* B, E
- let str = "晴纱是男娘";
+ a+ ^) ]7 a4 M2 H0 [/ N8 Y+ p - let ww = 400;
# y$ @+ b; o9 h! C - let w = getW(str, font0);1 B6 J6 `$ k" X4 S& c+ {
- g.drawString(str, ww / 2 - w / 2, 200);
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- 6 ^' C8 W; B* @
- const mat = new Matrices();
: L0 @$ B! s2 h1 ]* A% L3 J - mat.translate(0, 0.5, 0);4 v* ?/ u/ K- W- k$ ^
; y. ~) t7 V! j% c6 A) f- function create(ctx, state, entity) {
# k2 U5 ]# R7 x5 s+ e - let info = {
b5 o' A6 j7 }+ i - ctx: ctx,0 b4 _- U9 [) h/ U2 t! z
- isTrain: false,
+ o7 G3 b3 f7 f+ m1 C0 h - matrices: [mat],
& k8 {; w0 W) F% K8 }' f" ] - texture: [400, 400],
* D8 e8 o7 ]+ ]9 Y - model: {
+ K# A! D. C2 x* a% q1 _ - renderType: "light",& d; T3 [& e8 K) W* Q
- size: [1, 1],3 Z! x$ u5 N; M- H
- uvSize: [1, 1]9 g$ i) @6 l# g- E* ~2 R: s
- }
$ ?; h/ s- A' s. g8 H, i - }+ g! y& ^1 Q+ \. w1 A
- let f = new Face(info);
; e7 C) r1 U$ z0 ?: d - state.f = f;/ x' W* C# Y D3 j( l" `, T
1 c \8 z+ }+ i [' p/ t! A! u3 {- let t = f.texture;: C5 E7 g# B6 q' V& \6 k' M/ F( K
- let g = t.graphics;. [7 k7 y. v$ J
- state.running = true;
i% v' D1 T7 _+ q" H4 s - let fps = 24;
9 k1 v& O( Z0 ^8 x" G- N- R1 x9 K7 ] - da(g);//绘制底图
7 r0 E; y# L# d9 t5 c) w+ h F) A - t.upload();9 p4 |# R5 w7 J+ c
- let k = 0;( }9 \4 z& \: F0 U( H Z0 o
- let ti = Date.now();
0 c- C2 ^3 w! U# Y - let rt = 0;
8 w+ J) {" n3 E5 W* r S - smooth = (k, v) => {// 平滑变化) N$ {+ ^4 d% K, s
- if (v > k) return k;. ?$ G- ]0 Y! W% g8 ^3 n. O5 t9 M/ t H
- if (k < 0) return 0;1 a7 d P8 @: r4 x+ \& Z( C* ]
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# D! p* @! K+ I& a( q& z/ ? - }
1 O' g) H' h9 | - run = () => {// 新线程8 ]2 X7 Q; U( `" a5 b9 B
- let id = Thread.currentThread().getId();
, |1 m' n1 @' `7 z1 v; l0 O - print("Thread start:" + id);8 D F/ g( g+ @* s- z# J1 f W: Q
- while (state.running) {' {- a5 a2 q5 \
- try {
) O+ h8 r% w: V9 @" H, o/ L7 O2 _ - k += (Date.now() - ti) / 1000 * 0.2; v* N7 y8 `7 L6 n! e3 w
- ti = Date.now();- z, e' `- g J& J4 R
- if (k > 1.5) {
! v+ t! V+ s/ M L8 w - k = 0;7 u3 [( q8 Y2 s% V: Z
- }* a* u+ [+ R8 ]1 ]# _) ^* h# l9 f
- setComp(g, 1);7 M$ [/ k) w, q: z) U+ ^
- da(g);! c5 k7 P/ Y% \1 Q$ V& r3 r* L
- let kk = smooth(1, k);//平滑切换透明度5 x) `7 Z/ h X+ U' I- q/ `2 E
- setComp(g, kk);
- `! g* a0 ?4 L0 D2 o - db(g);
) p+ l1 P) u' @0 P8 n" d - t.upload();2 m# G# B) v7 H7 K& Q2 m6 b* V2 ^% p
- ctx.setDebugInfo("rt" ,Date.now() - ti);6 J+ @8 [2 D& A0 |
- ctx.setDebugInfo("k", k);
. u% ]+ m) A/ W' U, M) g - ctx.setDebugInfo("sm", kk);
8 w7 j! s. T0 {2 T - rt = Date.now() - ti;
: D0 U, g! O) I; U! e2 [ - Thread.sleep(ck(rt - 1000 / fps));/ r% w9 x6 [3 C1 S; h
- ctx.setDebugInfo("error", 0)
, u9 F L: R, o5 c - } catch (e) {
/ \8 V2 n7 f/ d; @; g - ctx.setDebugInfo("error", e);
6 ~2 a1 a+ y& F/ e - }& ?, H2 k X! g' a
- }
# ]0 w4 O* ?! A9 f& ~7 I& u) q - print("Thread end:" + id);* k/ t: G& D5 V! G
- }
* D j2 O6 X! ^8 i) z5 w - let th = new Thread(run, "qiehuan");
7 Y7 E3 ^% b9 _9 Y2 F, S+ k6 _/ s - th.start();; B" a1 W2 B8 P1 B: m% E3 K
- }
( J8 D3 d9 k# |" D - : a, I, L% y; U! J: f
- function render(ctx, state, entity) {
+ t: ] c ~0 \" {9 k - state.f.tick();
7 }- B0 t8 I8 l7 b$ B - }
% B5 \) v$ U2 X; K) x% s - 6 J" i+ [; u) d( b
- function dispose(ctx, state, entity) {# `5 S, r- l% \/ D2 u
- print("Dispose");
+ Z6 ?" R) G; e- U3 X; k8 ?6 r# l - state.running = false;
: Y" c' o( _; N - state.f.close();. ^4 N1 g2 ~9 L; ~& N
- }4 o; `" ?2 N5 J- ~. V
( T( P' c3 ~: ^3 v) H/ h- function setComp(g, value) {# t' S( H5 i! k) S6 b0 ], y
- g.setComposite(AlphaComposite.SrcOver.derive(value));
" C. k0 [9 x1 O* U4 ` - }
复制代码 - q' W& P4 c, 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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" h' e& }. y6 N# `: y5 C顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下), V" j- b o& ?9 v {. w
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