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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。
+ {3 s! A/ m# z5 @3 H' d2 y! m! G; F- importPackage (java.lang);! X b9 U+ ]9 @) N4 b
- importPackage (java.awt);* O0 U3 W" k7 W3 }; I/ r
* h1 L( Q7 R# `: g% J) w, k* I0 {- include(Resources.id("mtrsteamloco:library/code/face.js"));
- i& x& X# g. z
3 k. _: Z- X) G% N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
! l: t, {0 S% k7 ], N - ' C6 G, E n# w- h+ h% f
- function getW(str, font) {3 k `0 _) y ]- D% a$ W
- let frc = Resources.getFontRenderContext();
$ }3 R! @; h0 h3 W3 \4 S2 r1 W6 w9 x - bounds = font.getStringBounds(str, frc);
7 `3 R+ m F9 a3 k - return Math.ceil(bounds.getWidth());
$ j8 ^. g" t1 |2 e3 m2 f" G" c - }
- _5 u1 l. A9 }: w" e5 {0 [' _
* R! M# }& |. \* w- da = (g) => {//底图绘制: ], h, V$ e# [& t* J& R% x
- g.setColor(Color.BLACK);
- a0 o4 c$ U8 V+ ` - g.fillRect(0, 0, 400, 400);$ a2 G/ {+ e1 q4 {& o3 q) i
- }
: g8 w( g9 Y1 d4 Z9 U | T' k, b) y! ~
! u; E+ [4 w- P! Z; ?* h+ r- db = (g) => {//上层绘制
0 ?& X0 ^/ b3 g: T3 O0 _. J - g.setColor(Color.WHITE);
$ x( X2 {1 c' \4 h - g.fillRect(0, 0, 400, 400);' _7 S9 f5 V5 D3 u( |/ Q" G7 ^9 l
- g.setColor(Color.RED);
$ ?! G' B# e7 s4 [ - g.setFont(font0);6 ^5 g& c1 {+ @
- let str = "晴纱是男娘";
* Z3 @! s8 o9 X - let ww = 400;- F( F7 f2 m/ ~0 B, h
- let w = getW(str, font0);
3 [+ \, L1 I& g/ j0 Z - g.drawString(str, ww / 2 - w / 2, 200);* |8 P& `8 ~" ?# V) ~- e) }
- }
0 A% M' I( l j - $ U% v8 `1 F9 q2 m# K- E* _: f% H4 ?
- const mat = new Matrices();
! X9 ]8 ~- ~" e9 j, J0 A - mat.translate(0, 0.5, 0);; m- C) Y2 T* o. g% V$ J$ B. X
# [: K6 w Z3 K- function create(ctx, state, entity) {; b% H; _! X" g7 {' n/ x
- let info = {5 D+ ~+ |: r4 R8 d; h9 x! X" S
- ctx: ctx,. ^ @6 \, }) ^% L; T8 ~
- isTrain: false,
2 K' s% b0 U5 W2 P - matrices: [mat],
" p$ G; A+ y0 r0 x - texture: [400, 400],
' C! W/ @' J6 r+ H5 c7 w/ C) q- e; h - model: {
. u1 [3 y2 ~/ Y' p( z: E( j I& d N - renderType: "light",
8 @ F' B2 p8 E9 x# z5 ?9 v - size: [1, 1],) ?5 b- r S! z3 N7 k6 U
- uvSize: [1, 1]
- {- D4 m' C2 A Z - }
- l# l! O; K: U# i0 M - }
& q2 f1 U) _6 v( Q1 K$ N2 Z - let f = new Face(info);
; f1 D: z0 r# t% X) T- e - state.f = f;; R: i& |/ [7 A0 y
" g8 ? |8 Z+ f/ `- let t = f.texture;! L) z( P' A2 \( r
- let g = t.graphics;
) C" g7 A& z* L5 |7 J" r- J - state.running = true;% X$ t$ L- V+ p; K
- let fps = 24;
5 s( `/ w( D: q5 g* T( G' |# S - da(g);//绘制底图, K( l* I p+ b6 l2 E; O
- t.upload();: |- b! i* N# C8 o; x* j
- let k = 0;- p7 X1 \$ J+ ?& g+ [* [2 X9 f
- let ti = Date.now();& j' K% D7 g9 A: U) a
- let rt = 0;
0 m* v" l6 J" W, R* ^/ T& o - smooth = (k, v) => {// 平滑变化% v: h \: f7 w% [, s9 R
- if (v > k) return k;
4 H' l; c' Z4 v8 f - if (k < 0) return 0;4 \: Q# z; ?1 y' L) a* }% A; d
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
# ]4 e) a8 `3 m# q- q: }4 p* ?5 Y i - }. d1 r% x1 i5 q( Q4 e
- run = () => {// 新线程' s- b& ?# J! v: w
- let id = Thread.currentThread().getId();
" v7 i/ M- N! \ - print("Thread start:" + id);
9 V6 H+ F6 O. f ~! c, b/ [ - while (state.running) {* K0 t- ^0 U& b9 y7 D. v+ V2 C8 |
- try {
5 C& m( z2 k$ q" r - k += (Date.now() - ti) / 1000 * 0.2;0 V! r2 [- C d3 E/ S0 H
- ti = Date.now();
; G. d7 [0 U4 B- R! ? - if (k > 1.5) {
! N b9 J+ L$ W: B L - k = 0;3 M6 E* l/ }6 `2 w. g( i9 c
- }
6 ^# H9 |0 G$ b; Y* H0 t - setComp(g, 1);# ~% H9 T$ l% f6 h7 |
- da(g);" a4 R) V& k4 N' k# C
- let kk = smooth(1, k);//平滑切换透明度- Z( K( U/ }0 y9 D, ]" S! T
- setComp(g, kk);6 E- B& t! K3 Q8 a4 H. |
- db(g);8 {- Z3 U$ f5 Q' {( Q* S) h
- t.upload();- R% A( g+ ~2 @8 {2 ~
- ctx.setDebugInfo("rt" ,Date.now() - ti);
; e2 N2 h& F% }) K/ G - ctx.setDebugInfo("k", k);+ t) H* ?5 E, F$ V ? W' o4 L$ R
- ctx.setDebugInfo("sm", kk);0 k' d* F$ W/ V+ R
- rt = Date.now() - ti;
9 t# s/ k% w. K- }' s - Thread.sleep(ck(rt - 1000 / fps));
5 }: H+ j2 Z, ~) G L- M! P - ctx.setDebugInfo("error", 0)
7 |$ j. u" y+ p$ X - } catch (e) {
3 Z) V$ ?! B6 O; v3 Z, R) [2 N - ctx.setDebugInfo("error", e);. l( }: S6 X0 W
- }8 Y$ H% ?! Q4 m! M S
- }
' I/ k) m- u2 g5 d: [) | - print("Thread end:" + id);
1 m% O( w; p, c+ [ - }
& c$ R: H8 T9 L: j+ G - let th = new Thread(run, "qiehuan");7 S6 n* @! @+ J" O
- th.start();
! K6 b% l+ z, P$ O# l - }% e3 p2 G* m5 @+ o
+ Y, l1 [0 L- l( E- function render(ctx, state, entity) {
+ ^* x# ~9 x$ ~* X# ^+ x - state.f.tick();) G; w. b- Y' q4 \$ M% x
- }
7 n1 @0 F2 a: }! Q7 a" Y - + s0 W' @# R. l7 g
- function dispose(ctx, state, entity) {
" M" ]- L6 `0 m r/ e6 G0 C - print("Dispose");5 B7 q3 j% c1 E' v
- state.running = false;
; G+ q, N# U* o3 X - state.f.close();/ ^4 ~6 h3 x, K- `0 C# `
- }- K: n0 L# t' i$ s" E) q
- ) u8 ?0 k) z7 T9 d
- function setComp(g, value) {
* d" ^0 S/ _8 z - g.setComposite(AlphaComposite.SrcOver.derive(value));
3 f% o/ i L4 E* v; E - }
复制代码
( {8 ?% F. I# E6 u' V+ B9 P3 s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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; T: ^; l2 C& L3 @- [ a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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