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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。
" X+ h7 y6 r( h1 U) G- importPackage (java.lang);4 _5 ~8 k) m) q1 U ]7 t7 G, q3 R5 F
- importPackage (java.awt);
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, x1 }4 l3 f. z, @- include(Resources.id("mtrsteamloco:library/code/face.js"));
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0 I0 z" w4 S* [9 R! q, `- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {- }: z# Y, y1 f
- let frc = Resources.getFontRenderContext();8 u2 u9 X4 ]3 I+ W# j! t7 i
- bounds = font.getStringBounds(str, frc);4 S8 H" |0 E6 G- k
- return Math.ceil(bounds.getWidth());
* z6 t. O; U$ n( t+ r; D - }
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5 s1 `: o3 y( |' I) }- da = (g) => {//底图绘制$ K3 I* C, ]2 V# U
- g.setColor(Color.BLACK);
0 v% A4 q+ O& |$ ?0 c3 W - g.fillRect(0, 0, 400, 400);, f- X! i i( ?" g' p" X" r! s
- }0 f8 }% l# Y" m0 N. r
- * z1 n7 P$ R4 H9 b6 R6 p5 z% D) h
- db = (g) => {//上层绘制6 A: d6 i$ }3 a# m+ w
- g.setColor(Color.WHITE);
/ [$ u9 q# ^, Z! |; ~ - g.fillRect(0, 0, 400, 400);
% C' I2 v! `. w: ~* [ - g.setColor(Color.RED);+ P3 s* K3 j2 b! q3 g) W8 Y) k& v
- g.setFont(font0);7 X/ ?* f( [2 h
- let str = "晴纱是男娘";3 r8 F9 X* M- u2 Z4 j* n
- let ww = 400;8 c. `) S/ w0 ]" A9 |+ y2 f
- let w = getW(str, font0);; b" ^9 a* w* f/ c# R
- g.drawString(str, ww / 2 - w / 2, 200);7 \2 u0 e( T$ X z
- }
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) M, k3 l! e; M2 h+ p0 F- const mat = new Matrices();
" d* V& }: T4 w( L, q - mat.translate(0, 0.5, 0);! H% D" H8 |- A" X$ R
- / s, M6 J' G. J$ w5 D |5 |! s; Q
- function create(ctx, state, entity) {
^1 R: _* ?& q1 Q, m% w - let info = {
5 k/ ^1 q6 K0 g7 { - ctx: ctx,
% j6 M. t f% e1 M1 z- ~8 p - isTrain: false,3 D: o! B T c0 A3 p
- matrices: [mat],9 N: S6 H: A& ], y
- texture: [400, 400],# |8 v h4 ?0 B& W( ? d
- model: {, S7 e( V' W, g$ v
- renderType: "light",
. {0 [# J4 T- { - size: [1, 1],3 W7 ]5 M" |& \+ V" a
- uvSize: [1, 1]9 O" ]# Z; }# _7 v
- }& W7 A+ ~2 I' `0 }# v5 f
- }% ^* ]/ L. k; ^7 A+ w2 i
- let f = new Face(info);3 Z t6 D! o$ J, k1 o1 z
- state.f = f;
9 J2 h& y8 J. Y# _* N/ L - $ X" y$ o) k. G. f" V
- let t = f.texture;, y7 X- E7 M- ~
- let g = t.graphics;
6 D! c* m" p4 J- r9 N# {6 t9 A% E7 c - state.running = true;6 H5 X0 B9 F( [8 w
- let fps = 24;
# B. q6 F+ Z+ w8 m" m' d, S9 v - da(g);//绘制底图2 `1 x; j7 b p9 ~ N& }1 S; ^
- t.upload();
! C5 x! I4 W# A* A0 I - let k = 0;$ v! J# u1 d8 R& i" X" M v3 x
- let ti = Date.now();# P7 I; R/ G3 f/ o; k! J# B3 {
- let rt = 0;. p. S; `1 R1 _; M- l& u2 ~1 z
- smooth = (k, v) => {// 平滑变化- E5 b; U" Z, Y$ X& \
- if (v > k) return k;
. e! B9 ]5 r! Q0 t - if (k < 0) return 0;7 q& Y/ }0 `2 Y1 d$ n
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
7 k F; d. J; ^5 x& X' p - let id = Thread.currentThread().getId();
8 z0 [" Y5 q- L" P R; I% F# e - print("Thread start:" + id);7 s( F0 t W, l6 J$ U( c: V+ b& f* L% C
- while (state.running) {' Z. p6 S6 R* ?
- try {& u O; G* n' _; }
- k += (Date.now() - ti) / 1000 * 0.2;
- M" l- q3 C# g$ j* L+ [* M0 E0 @ - ti = Date.now();# n! K# H* a' |, ^ S: ?4 m. V4 U
- if (k > 1.5) {
0 h( p' t% i7 @+ g" l3 @ - k = 0;
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- setComp(g, 1);( K6 D9 Z5 [! u2 f
- da(g);
( y) `& B; [& Y, Z# ?; H8 c - let kk = smooth(1, k);//平滑切换透明度% b6 H1 l0 T$ {) y+ h% L+ O
- setComp(g, kk);3 }( [4 |0 }/ R! D% X
- db(g);# n! K) p" v9 l' f$ F) i
- t.upload();
) P" D+ V# G: b# _0 p' |$ p - ctx.setDebugInfo("rt" ,Date.now() - ti);, l; ^% d+ r% k' D
- ctx.setDebugInfo("k", k);: f$ _7 l% Y0 A$ j. B
- ctx.setDebugInfo("sm", kk);
e( x6 P3 e% N/ S - rt = Date.now() - ti;3 R8 z" \& n3 ^. \& R, G
- Thread.sleep(ck(rt - 1000 / fps));- P* {* r* i0 U& j
- ctx.setDebugInfo("error", 0)
, N+ t/ X1 w2 B! B6 m- h - } catch (e) {' ]) ~$ N+ j" e- ]
- ctx.setDebugInfo("error", e);8 l, m1 q* I: A+ B: ^: V! R) y
- }8 H7 A6 C( z; ]
- }
! a( A' R2 Z r k' a. G - print("Thread end:" + id);$ w+ m+ S8 k$ j6 L3 m3 M0 ]/ B
- }& C z ^0 Z) o/ k
- let th = new Thread(run, "qiehuan");& }' f: h$ R/ ?1 b% W: A7 k
- th.start();4 t) f+ t2 j& `; x" w
- }
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- function render(ctx, state, entity) {& Y8 g# r7 ?* D1 z9 {8 }
- state.f.tick();9 o3 H3 H/ m }% I
- }
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- function dispose(ctx, state, entity) {
* f7 P) Y5 \) I - print("Dispose");
u, Z3 ?( k4 E5 j( V4 b - state.running = false;
1 t/ ]( x7 U. {4 h( w" w/ | - state.f.close();& I# x- U9 w- Y# h
- }
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- function setComp(g, value) {
' [+ h7 p+ ]. f* m* \/ m, p8 @ - g.setComposite(AlphaComposite.SrcOver.derive(value));' C% Y, `! y! p/ H
- }
复制代码
* \- }) B ^ k7 J, @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 P& E2 C1 l3 u4 K% v: I
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下). g! S; v. q6 z" r) h8 u* k" ]. P
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