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q. f. ~7 E' v, v3 ?- w" E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。8 |- e5 c2 W9 [2 V' Y$ t9 j
- importPackage (java.lang);: l, S: C1 Z4 m+ h6 \+ G8 ?3 _
- importPackage (java.awt);* y. B! m0 o, c: f7 d3 K) q
- 1 ~( x: {: e, R1 Z
- include(Resources.id("mtrsteamloco:library/code/face.js"));
% S5 {% B1 G- P
9 N2 F3 r, z$ v- i% C- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
* x5 Y! ^" X2 D/ R$ i! K& x6 [! q
+ L" u3 u- E" |: d' k+ ^- function getW(str, font) {
/ Z- ]# y" v8 J" R6 { - let frc = Resources.getFontRenderContext();
* D6 i9 x5 N6 p! H - bounds = font.getStringBounds(str, frc);, w0 _5 N; ?5 k G9 |6 c
- return Math.ceil(bounds.getWidth());
, Y {3 n2 n8 _- l+ G7 s* W - }
+ u5 q# D4 V5 _6 V1 o1 p+ X% S - 2 L6 {) G+ K$ v9 Y( H0 P( ?
- da = (g) => {//底图绘制
, D5 A0 [/ P1 W+ z1 S2 Z' j; i - g.setColor(Color.BLACK);' v$ Z% o( a. ^) _! y( P2 j4 F
- g.fillRect(0, 0, 400, 400);
4 }4 w0 I% K0 _ - }
7 I0 W+ n2 Z3 R) f
$ \! E6 ?4 }; X0 W; l7 L- db = (g) => {//上层绘制# |+ K, }" Z2 `0 K
- g.setColor(Color.WHITE);
. M$ N, b# f" J$ P* `" ~1 q" W - g.fillRect(0, 0, 400, 400);
V( z3 ?/ b+ ]" C4 E - g.setColor(Color.RED);& j7 }6 t2 a; v
- g.setFont(font0);4 k3 M+ z! c2 V$ M
- let str = "晴纱是男娘";/ m( Q' l1 Z5 I, U# \2 w+ ?3 D
- let ww = 400;4 K% G& M# c t1 [9 t2 T( N" \2 }
- let w = getW(str, font0);
. z/ J7 U: d4 i5 Q2 M - g.drawString(str, ww / 2 - w / 2, 200);# X! z5 A3 q. V0 z2 \
- }
2 l+ A0 z* z& C8 E8 v! S% i+ p
8 B% X! k4 `% y X8 E6 I1 m3 Q- const mat = new Matrices();5 Z6 P. k/ a4 A$ S$ I; `: Y1 B
- mat.translate(0, 0.5, 0);
, e; T, ~# @- Y- j! |5 L! h6 f5 u - . Y. ]( J4 t) W. g+ ~, C2 w8 |7 l
- function create(ctx, state, entity) {
; v0 U. M% _/ U$ [& ^7 h3 b" h - let info = { E* f: G! O5 }/ j9 Q. O* r+ n
- ctx: ctx,: Q! R$ L/ |1 W4 ^5 P* c3 w o
- isTrain: false,
% i1 O% }9 t3 w# h - matrices: [mat],
( y& \4 ^ o$ A+ ~' w - texture: [400, 400],2 k& I" |5 t* ^/ F5 F
- model: {4 I. F( ^ m' G V3 V
- renderType: "light",7 [9 z3 Y3 O& q8 b" r
- size: [1, 1],9 g/ E1 q8 k" C0 U2 i
- uvSize: [1, 1]
5 i5 y) b' E8 d2 q& r - }
" E* _- [* H: m1 n - }' v E9 G% F! b" t* A( T
- let f = new Face(info);
0 C/ k3 i2 x5 f) A3 c3 v' D# Y1 g6 P - state.f = f;
) p. m$ i9 L9 v U% V) e8 D
% o2 `' x& t M8 P+ S- let t = f.texture;
0 O7 y$ @ U: I; h, f - let g = t.graphics;+ x/ d. |2 Q# K# c
- state.running = true;7 N5 X. C4 |/ v: A7 Z, x, E
- let fps = 24;6 w! X. u5 D( p+ m3 z3 q0 ^# n0 z
- da(g);//绘制底图
$ }) s3 H3 n5 v, F; v( J - t.upload();; u, T7 y5 ]& U0 e$ z
- let k = 0;/ c) s& g. z4 `
- let ti = Date.now();
* g. c p; Q1 Z9 d - let rt = 0;* ]/ e- c- C- x8 y0 W* U
- smooth = (k, v) => {// 平滑变化9 _1 f+ l9 ^8 ]9 n2 w
- if (v > k) return k;
6 `4 R: t- `- B2 s4 S. K, W - if (k < 0) return 0;
& d1 ~$ ]5 g, x) K% e& e - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;! b6 V% h9 y1 O3 _) y' b h! X' _
- }
& z# T- P& `2 ?1 }. s - run = () => {// 新线程6 ?7 p' x. A& g4 P
- let id = Thread.currentThread().getId();0 i4 D( u- a/ {7 \+ w ^
- print("Thread start:" + id);3 ?9 v* J: c+ |8 v
- while (state.running) {
$ L# R5 p6 h4 C; j8 C - try {
' F( w$ @. |3 a* h; Q+ h5 E! X2 p5 L# d - k += (Date.now() - ti) / 1000 * 0.2;/ ^# H. f$ s }. z; ^
- ti = Date.now();7 B: {0 S7 e7 d8 `" b
- if (k > 1.5) {
( d. ?7 p+ N$ ]( w/ v0 d( a0 c - k = 0;' c7 r" p! ]* z9 H7 y
- }. }" K3 W0 s. e- I* [
- setComp(g, 1);- k8 b9 r( Y% B& p0 j
- da(g);
3 P. a; [1 ?5 b; n - let kk = smooth(1, k);//平滑切换透明度 Y# [) \* O* o) n: p, [$ V' C
- setComp(g, kk);
- K9 \$ B q0 e9 S% e( T - db(g);
% t" {2 |" k3 c - t.upload();
2 o7 Q$ p: q" I. ^2 i9 m - ctx.setDebugInfo("rt" ,Date.now() - ti);
7 H% I% l& ^; C, @0 y6 o6 r7 N+ T9 [ - ctx.setDebugInfo("k", k);
5 f+ `& F+ r: H' F9 z8 H, e- q - ctx.setDebugInfo("sm", kk);* [$ g* u: j3 v% X# B: T# A8 f# ^
- rt = Date.now() - ti;: {# S! v( S6 i6 i
- Thread.sleep(ck(rt - 1000 / fps));9 z |" g6 {+ |
- ctx.setDebugInfo("error", 0)# o4 N! x; n8 z# q* K/ \
- } catch (e) {" O4 w2 |; j# s: X
- ctx.setDebugInfo("error", e);" {+ y9 _1 \$ E V1 L# ~1 L" {" C/ x
- }7 E; f% ?8 q7 i8 Y' X1 B
- }0 ]: J! o: m! s# ^1 u
- print("Thread end:" + id);
5 x( |% l' @" K/ v0 a7 m* i2 h i - }' A6 A/ _, {" o* y' M8 s% q: D
- let th = new Thread(run, "qiehuan");
, B* b, j" L. Z4 U - th.start();, `$ R3 Q% J! R; A* _
- }4 X5 m5 U2 Q; R# c1 C6 @
. V0 Q5 Q T" U7 }& w2 }- function render(ctx, state, entity) {
# I9 h5 P1 `" i# }2 X+ H0 q$ m; c: d - state.f.tick();7 P2 V8 g$ V& B& r
- }
m$ q9 e* i; Y, T8 z$ _) v% S6 } - / u j: l: ]8 ]4 J$ n
- function dispose(ctx, state, entity) {# }! v6 @( s8 [( B; a
- print("Dispose");
( p) k' g7 p- S( h - state.running = false;
( b! ^0 T7 ?1 S/ t/ B# L: ~ - state.f.close();
% s- P* x% c) U, u' `9 I - } i, B3 J8 c9 t3 ^5 K. f
- 8 K' c) h0 W3 |2 `
- function setComp(g, value) {/ g% B/ m6 E5 F. [/ n) l
- g.setComposite(AlphaComposite.SrcOver.derive(value));
- Y9 @& Y3 a6 ]/ |/ j' b1 t( F, Y - }
复制代码 & I& Y6 f4 ` U9 I, i$ Q9 G5 G. 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。
! f3 S2 x/ U( D9 \4 ` [ z6 B" S. w) V7 D9 {
# \ X f/ F( M* j$ D& 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)1 j! @; t, \. z/ Y* N6 q
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