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7 R2 [6 }, r, }. ~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。" ]7 }8 h1 x+ s) ~
- importPackage (java.lang);
$ j" M) S5 n6 } - importPackage (java.awt);4 D/ B: W# d7 r2 |: w8 l/ [
- $ U' c3 f- f& A
- include(Resources.id("mtrsteamloco:library/code/face.js"));7 i0 }0 v; R; K \" Q9 u ` v
- 5 s% M( p! O# a8 ]6 Q1 O& J
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);( y" M& `) D/ ], i" y
- k% N+ d2 Q7 [. y- function getW(str, font) {
0 a% D, I5 h0 h' ~% a3 G - let frc = Resources.getFontRenderContext();+ ?$ z; T& d( x' l# }* T
- bounds = font.getStringBounds(str, frc);
5 A. E' ~$ Q& A6 T& |. ^ - return Math.ceil(bounds.getWidth());
$ w, h$ B5 o+ e' `0 t - }
" P* U+ k4 r5 E; T D- x - 5 Z! G% }8 n8 ?, M
- da = (g) => {//底图绘制" O9 Z4 f$ W9 h1 Y( ]3 W3 \
- g.setColor(Color.BLACK);9 X) |( s, D, n, U$ h
- g.fillRect(0, 0, 400, 400);$ {! S2 a- W4 M0 |& L( C+ g# H
- }
- [* M. s5 Z; X% F
0 L$ ?+ j6 U: L4 r2 b# M. f- db = (g) => {//上层绘制
1 F# e! s9 @6 l* a6 }1 ?& f; W - g.setColor(Color.WHITE);- l* l) B4 n* E( @: b( B
- g.fillRect(0, 0, 400, 400);2 j' Z1 f' [4 D: _/ ?1 y) Y/ _* G
- g.setColor(Color.RED);
. X. }' B+ y, a$ g& A, C - g.setFont(font0);
; B$ ^5 Y: x1 p - let str = "晴纱是男娘";
/ z% S8 n L$ r8 l0 j- s - let ww = 400;7 B+ k. c Q, p: }6 [9 l; X. c
- let w = getW(str, font0);
1 |- ]8 E$ T1 `" ] - g.drawString(str, ww / 2 - w / 2, 200);
% @+ J% |4 v$ [6 ^7 ?! G - }
) h3 M; p# R8 k* ^
* m+ v5 X- i1 q5 j- const mat = new Matrices();
4 D. C8 Y' N9 G% S% W9 g - mat.translate(0, 0.5, 0);6 O1 g4 F j0 l- a) J) e# A% W4 w
; ^( b" {3 ?* ]" {! H6 D- function create(ctx, state, entity) {
( N& G8 Y: a. \4 D - let info = {4 o5 T7 k' A# X
- ctx: ctx,* L J% W0 J, U& X4 l0 X
- isTrain: false,: Q4 p- |0 g1 Z& X
- matrices: [mat],# ]+ } H4 d: d4 O
- texture: [400, 400],; N& w& e" m4 `. T! Y, n/ ?
- model: {) D" Y* v. P5 H0 E/ @0 _: |
- renderType: "light",
& b0 O4 i4 N+ f( v k8 P - size: [1, 1],
' b8 b/ V! L8 {, `2 ~ - uvSize: [1, 1]# D3 p1 @' ^4 @4 Y( x/ Z
- }
# E ^6 V. P7 }9 f* _# r: n - }
7 W7 H( y. H8 L: z1 X5 S8 x# R9 _ - let f = new Face(info);
! s; o1 c! K- x! {7 _ - state.f = f;6 C! V' P( I/ o8 n8 `! e
- ( V3 b' A C7 r
- let t = f.texture;
! A7 x% \9 s' }5 D& e0 h4 [ - let g = t.graphics;
; Y% r; w; X" m4 b2 x8 L/ K - state.running = true;6 B4 l4 q" Y% X$ O
- let fps = 24;
7 F A. j/ x: ^" q* u! e& M# e2 N - da(g);//绘制底图- Q/ g9 K. D; ]
- t.upload();
, K. e1 N* I. E0 a' [ - let k = 0;
/ Y% F2 F+ R- ~8 d - let ti = Date.now();
8 ]- P& K: a: O2 N! n - let rt = 0;
3 _1 g! i6 T* c: _% h2 Y9 S; z; i - smooth = (k, v) => {// 平滑变化* @( \ I7 U' l; V# B4 I
- if (v > k) return k;/ T! G& d; r6 G
- if (k < 0) return 0;
A! x3 W" V2 N% w+ g/ d( p! I - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- i/ V2 K7 p/ ?& g! Y
- }
2 U. `6 k: a+ X - run = () => {// 新线程
4 A0 @0 b1 n) x0 V% ] - let id = Thread.currentThread().getId();
* {+ k4 E, J' j8 \ - print("Thread start:" + id);) f2 j% M0 X+ k" Z' I5 o5 }9 s
- while (state.running) {
5 i/ O' V3 D7 Z8 @ - try {/ G: d) n9 r1 X; Y
- k += (Date.now() - ti) / 1000 * 0.2;8 S l1 U$ R) U6 O
- ti = Date.now();
& F/ k# t$ O* L: J! l% M+ t, Y - if (k > 1.5) {
0 f! R* x2 d; J0 ] | O4 P - k = 0;
, V% E& u$ [0 m* c: Z- P - }5 z$ Y$ h0 H, ~2 k( E* _0 s
- setComp(g, 1);
8 A0 G) m* g$ r( e9 B - da(g);
, ~, ~4 L) {& Y; a - let kk = smooth(1, k);//平滑切换透明度
+ V; ^2 G4 ~& t( N0 v; J - setComp(g, kk);
9 Q" s, Z d% T0 N9 {( S9 Q% l. N - db(g);
8 G9 a3 B% ?: Q" p' ?7 a3 | - t.upload();
( ^8 a0 q2 `2 @* Z& N3 I% ~ - ctx.setDebugInfo("rt" ,Date.now() - ti);
6 ?# |5 c$ X0 x$ J3 E3 J* f - ctx.setDebugInfo("k", k);. z2 T. r/ I2 Q4 [$ }
- ctx.setDebugInfo("sm", kk);6 R" U1 l3 X6 ]
- rt = Date.now() - ti;- J- J6 j [/ F5 s: X
- Thread.sleep(ck(rt - 1000 / fps));
+ y! m, N+ d- x B& p6 J - ctx.setDebugInfo("error", 0)
, ?- ^. H5 m' m; o - } catch (e) {0 @" {9 \7 n3 Q l$ b
- ctx.setDebugInfo("error", e);
# m! Z. u+ p5 S* R - }
7 w0 U) M- o; z$ }! F - }
: u9 S! @7 }, W& u - print("Thread end:" + id);. ^. E6 F1 \. n ^
- }$ t' l" m5 ]% \9 x
- let th = new Thread(run, "qiehuan");
4 `" P% D$ }3 K6 d! W- I2 F - th.start();
, r) s6 l( ~7 I$ L3 e* [ - }
" X8 x& U: P2 D% M8 f: Q% R
. N/ {1 D3 f( t3 G. ?( m- function render(ctx, state, entity) {4 n- s! t; B# y7 |; H
- state.f.tick();0 T6 }/ Y& m$ {' l8 ~7 T u; L% }# ]
- }
; N& c1 _0 O3 C: M4 S
+ X/ T2 I" F4 o( s Q0 E1 r- function dispose(ctx, state, entity) {9 {9 k) R: `( f; u$ ~+ E" I
- print("Dispose");0 t: E% R( [+ f1 r3 m
- state.running = false;
7 p1 D+ c( f% F- F. o9 R - state.f.close();% W, @& X1 L. e
- }
' ]. S/ {# Y9 F4 q7 V+ ~. Q- | - , }5 H, U/ ^! }# C0 Q
- function setComp(g, value) {5 {2 q8 [% Z% ]% U$ V
- g.setComposite(AlphaComposite.SrcOver.derive(value));
5 z& L' n# R9 K% l - }
复制代码 3 n' c v) ?, @8 [% v9 D
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。4 g$ A# |, C/ a1 Z& a
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# B) R D) A. c0 n C: I顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)5 t6 ~1 d: H4 H& ]$ o
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