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' p+ Y. }; y9 P( ~9 c- q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 Q4 H- @$ e8 a$ u5 t( e+ p
- importPackage (java.lang);
; t) ?5 M* L3 h. s - importPackage (java.awt);) T9 n4 s/ w! f/ E
- 6 D* I2 G$ r7 }
- include(Resources.id("mtrsteamloco:library/code/face.js"));5 i6 |. o. M- D" I* S
6 C4 B- J; G. x" ~8 w; m c- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
3 n! l. w; V- l0 i
: O/ N# X9 M' m0 Y- function getW(str, font) {
9 _3 d2 @* {8 J) P - let frc = Resources.getFontRenderContext();8 K; h: k5 I1 z) f
- bounds = font.getStringBounds(str, frc);0 N. d# S$ f7 e2 S
- return Math.ceil(bounds.getWidth());; w5 d! B: P6 W$ [
- } `& N0 i" |9 [' Z# u# k6 J& s
- 1 k/ A0 k1 ?/ C. o# \( n/ g
- da = (g) => {//底图绘制
8 R3 p# c1 h* Y - g.setColor(Color.BLACK);
8 [/ N; y7 u9 Q- p. D7 M - g.fillRect(0, 0, 400, 400);
- G( Y# K" {& o) h7 y& L8 f - }
M3 `6 Y2 b4 V
5 q: N8 w, g, z! h% w! B* t- db = (g) => {//上层绘制/ ]. f$ ?# K) N9 k5 S
- g.setColor(Color.WHITE);- L0 a2 v5 ], S* T5 A1 \
- g.fillRect(0, 0, 400, 400);' I' Q! f. m+ U6 w# Z2 C7 a2 @0 I1 b
- g.setColor(Color.RED);
; {" N! Z3 {- U9 c; b - g.setFont(font0);1 U% W2 F; v7 s1 `, d
- let str = "晴纱是男娘"; R) [1 J0 R! Z7 n
- let ww = 400;
/ D! N, n- x3 w( B/ }/ A/ H - let w = getW(str, font0);
7 p! o. \6 n! B2 S8 U - g.drawString(str, ww / 2 - w / 2, 200);% y( r2 ^# P. P" p
- }
, {& r: Y" G$ f3 ^
' t" F/ H- J8 \6 ?8 {0 J0 A+ U. a- const mat = new Matrices();
2 f7 O" B1 \. E* C9 m3 [ - mat.translate(0, 0.5, 0);
% t6 b2 W/ B5 H
4 `0 r3 U6 R i: y: j- function create(ctx, state, entity) {
6 V- ?9 a! }, [0 \1 K9 @0 n - let info = {
. J2 {0 n9 A4 R' m: b. o9 X - ctx: ctx,
. g9 R) q+ Q& E; i7 Y9 i - isTrain: false,
0 Q n& Z5 p( u/ m- T- V - matrices: [mat],
# T3 C/ K7 i; N3 n0 u - texture: [400, 400],
1 B+ g$ n9 I+ \" @$ c# y# u- W! C; Z - model: {
! I. }7 b9 `: k8 x8 K( X- n - renderType: "light",
2 Q* d) }/ h( n1 } - size: [1, 1],- H- _, k2 G: C
- uvSize: [1, 1]1 |) k8 }( d2 r* L9 ?! o
- }4 b2 y$ C7 E1 C, ^3 F" S; b! X3 |
- }
+ S0 Y# k: {% P3 S: a, J - let f = new Face(info);5 l, Z: d; b5 Z( C, H" N- t: n
- state.f = f;! a) W: G7 ?! @7 @7 [
/ E' G3 r. U$ i2 |. z+ m( {- let t = f.texture;
8 N3 H6 j* g# ]7 e5 B9 U- x- m - let g = t.graphics;
+ e6 h* b9 z& m: K, o% N. H - state.running = true; K4 x2 e7 k! d$ ^. V
- let fps = 24;
7 @2 b. B( a% w3 e! V - da(g);//绘制底图
/ a/ ~9 ^( T! L3 |4 O - t.upload();1 ~6 a! k9 E: M1 _ E
- let k = 0;- o1 H# h2 z0 B5 A
- let ti = Date.now();3 f, b4 R, F" L. b) F: J, U
- let rt = 0;( v" d- U7 b2 y5 m' U. u6 @% t% M
- smooth = (k, v) => {// 平滑变化
) E& l; J: L+ ]9 D, t3 F - if (v > k) return k;
, S3 |6 D6 y; w2 J - if (k < 0) return 0;- c5 l8 z ~. f! H& S- H: W a# J
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;. N4 S0 s( d9 y; p
- }
* ]5 k+ T. ]( k' q8 \ - run = () => {// 新线程
2 j3 v8 F# m( |. B# W - let id = Thread.currentThread().getId();4 ^4 p( Y, v8 f" u
- print("Thread start:" + id);3 y/ M; t: a) {1 n. T% J
- while (state.running) {6 r$ k1 H5 c6 k3 P; ~8 [! t
- try {- z! h7 P% W# `% @ _2 X5 h
- k += (Date.now() - ti) / 1000 * 0.2;
- v* R/ {+ N9 M# x& _) x( g# Y - ti = Date.now();
& V: `$ V- O5 m, g- |# h - if (k > 1.5) {
. x/ r1 m$ c9 i7 u - k = 0;0 D4 E/ D- g0 R$ v+ R$ g* t0 O0 p
- }
. b& L' r. j0 |- F, a- p$ f - setComp(g, 1);
4 {9 q, S, ~, w1 o+ p6 w: s, ^ - da(g);$ u, j, k. Y* d$ r% P [3 S3 |1 U
- let kk = smooth(1, k);//平滑切换透明度
2 | I$ `6 _- L: t2 G& l - setComp(g, kk);( H \: U# n" D+ b5 O, e& ^/ l
- db(g);
/ M( A5 }5 v! o4 e1 A! n - t.upload();4 a& \$ U" z; @0 [/ F
- ctx.setDebugInfo("rt" ,Date.now() - ti);% e$ s3 T) c) W/ f- l/ k/ r) c% ~5 a
- ctx.setDebugInfo("k", k);
1 R T/ v) r% ^# o2 D) i - ctx.setDebugInfo("sm", kk);6 x) l+ k2 d& J" i. K9 {- L
- rt = Date.now() - ti;
% [. w# g c1 K b1 h! b - Thread.sleep(ck(rt - 1000 / fps));8 P' j# q, A* _9 N" _- Z: Z" |
- ctx.setDebugInfo("error", 0)
/ G% ^! D% f0 S - } catch (e) {8 W8 o8 c; Y' N9 o
- ctx.setDebugInfo("error", e);" t# M; U) P0 ?+ o9 ^
- }( b4 j' h7 J k
- }
5 z0 V/ E8 \7 V - print("Thread end:" + id);
) [% F2 J4 s& Q4 L+ m - }
" z* C- O* J9 q, {, k" W4 } y' h6 ]6 ^ - let th = new Thread(run, "qiehuan");, k u I! d& u5 X2 H
- th.start();8 p0 ~1 z, t( S0 F% B, ^5 A
- }* C. ~3 K g( G. G5 A5 M# D" d
% i0 S1 l/ c+ y: y: l d- function render(ctx, state, entity) {# x) \( I& C: _1 ]
- state.f.tick();
8 m) O2 ^4 _4 ] - }
' d8 K: H& J' e6 K' X1 m7 k - # p7 G' j. v4 l) ], o4 ?$ [
- function dispose(ctx, state, entity) {
; z" p+ W$ S$ L& J3 p( s$ k - print("Dispose");4 M" K# G0 {( \5 h
- state.running = false;
; |* F# t! @. p$ f- b% ?4 p% @7 \ - state.f.close();
+ V9 T/ e' w9 c$ D& G - }: r# ]# h; x" Z! h! j
- 5 M8 _# C2 [1 c6 Z: x
- function setComp(g, value) {7 `% m7 W. q! E8 ]
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 R# r. O2 O) L& D( V* B h
- }
复制代码
/ J' J) Q/ ]; R6 a: K( D! 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。
) i( N- T, u" J; w |, e; W/ @. a9 q$ i
& E) E* A2 Z% o7 Q- e2 }3 I7 N' v顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)7 H1 g% p2 j: ^% b
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