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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。
1 Y$ f# H! H9 s/ S- importPackage (java.lang);
2 x: _4 `* z, \, s - importPackage (java.awt);
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' ~% ~, S% Y$ [* ` C# b( r4 t( s- include(Resources.id("mtrsteamloco:library/code/face.js"));) _/ D. h* Z X3 ]' e: a
- # }. R- q/ p" P# S9 R
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);. l- u& G: u) F) ?) u5 h! @
" [1 j# F- ` ^2 \3 V. h$ A+ n2 E- function getW(str, font) {
0 X7 t, c0 \) J* ^) [ - let frc = Resources.getFontRenderContext();
. y$ x a& ~4 e3 a6 J* C& O% b( q' Q - bounds = font.getStringBounds(str, frc);: v# l# V4 e3 w; _" c
- return Math.ceil(bounds.getWidth());0 T8 c; z0 ]: P! i- f
- }
. w: S# l. X8 E7 t6 n# W2 f( Z
$ r/ a6 @ D: {) q4 v8 B- da = (g) => {//底图绘制
6 d) F7 `* T+ X* V6 z& q - g.setColor(Color.BLACK); \9 i9 E$ U: @3 C5 |
- g.fillRect(0, 0, 400, 400);
- d3 K9 h$ M Z; t; l8 N5 A7 ]3 T - }
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$ n5 I9 X4 |5 Y8 W- db = (g) => {//上层绘制, E- {8 s: b% H' ^4 F: t
- g.setColor(Color.WHITE);
z0 ^2 M4 }8 s: ~' L' @ - g.fillRect(0, 0, 400, 400);
! X7 y% e1 K+ G* q% P$ f - g.setColor(Color.RED);
1 w0 ^0 }6 Z0 n9 V- h0 Q6 I1 u - g.setFont(font0);
) }4 P6 H9 g4 S& c, ^7 |0 r - let str = "晴纱是男娘";6 ?0 S$ Y, \& `' D" J
- let ww = 400;# I' s. \6 N. o8 ~) M
- let w = getW(str, font0);
5 J0 e* n, ?/ w8 @ - g.drawString(str, ww / 2 - w / 2, 200);
0 s0 y5 m% s0 y8 l/ q, i# S" M - }- D M0 G3 l* P- v! Y- f
- 0 ^' W: p6 X# h7 [: u, h1 L; H M1 U0 g
- const mat = new Matrices();
( f7 v4 m. g! u+ {" z% ~3 W' f8 e - mat.translate(0, 0.5, 0);0 L) c; ?- o# R% ^! f
- $ s: ^( G# h @) C4 i- b
- function create(ctx, state, entity) {" u; k; U0 D! Q9 v0 I
- let info = {
6 d5 Q5 z0 i" {. H. ?% b - ctx: ctx,
7 [% {% ^6 A* d. S: j3 Q4 Q - isTrain: false,
?& W; v' {% v2 n# i - matrices: [mat],
; E8 Q$ N- Y3 k! F( k. B - texture: [400, 400],7 U8 X. ]! d4 q* Q
- model: {! B" Q, M" g' n3 B& F7 x
- renderType: "light",( O; {) ^. d# ~/ m+ g
- size: [1, 1],
/ e: \1 Y* m* \ - uvSize: [1, 1]" W1 b) c4 c1 ~9 V6 Z, x% m
- }
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- let f = new Face(info);
$ f; w9 v7 u$ C5 @2 C - state.f = f;
/ W+ [% e! b0 L- [' \
8 H2 r' h& E+ D5 Y- let t = f.texture;
( N8 e. j' z% g H2 P& [ - let g = t.graphics;
D' s! X3 K5 ^ - state.running = true;% H# \# _1 S* x x6 e# t
- let fps = 24;$ @# ], I# u) M/ O0 E
- da(g);//绘制底图( t2 W. t# G8 t2 |2 ~3 i
- t.upload();' W8 E/ i4 {% t' A% a
- let k = 0;& @0 g, d& C, l5 K' P
- let ti = Date.now();
3 q" F* Z. D8 C: ], Q4 q - let rt = 0;
# n z" P% u' Q7 w0 S+ l - smooth = (k, v) => {// 平滑变化
6 P% h* l1 y2 o - if (v > k) return k;6 v. h: e5 j4 ?. A1 b0 B9 e. v; K
- if (k < 0) return 0;
+ K) J5 S- |5 O7 I - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& ?& X2 u% f2 C; v# m; x - }
8 i1 z" V( } x2 ?' g$ j+ U - run = () => {// 新线程8 L" F0 c/ ~+ h+ n$ A* u. F; m: c
- let id = Thread.currentThread().getId();
9 Z9 s- K" D$ C9 }0 o" f - print("Thread start:" + id);
) G2 R1 a" b! B' P3 z! J - while (state.running) {/ _( H1 j: x5 b- j" K- @
- try {
0 `$ i$ M3 q& I" c - k += (Date.now() - ti) / 1000 * 0.2;8 u& \1 |5 _5 \0 u' z. M
- ti = Date.now();
! D- L9 J$ H8 { - if (k > 1.5) {
7 p- s$ _8 z% K0 y) V, b - k = 0;' s- Z9 ]0 ?9 V8 D2 Z
- }6 a8 C3 R+ w, o+ X- s
- setComp(g, 1);
Y$ @# e" q( B: ^- {0 x; V6 R. D+ V% G - da(g);* G: m) E# b/ B/ h, k7 [4 H* g3 k
- let kk = smooth(1, k);//平滑切换透明度
& D3 U1 e8 L/ K - setComp(g, kk);: D# c& @# R. j# j
- db(g);9 E- [( G9 V! s# n& g. f
- t.upload();
( q) f( G* |1 \ - ctx.setDebugInfo("rt" ,Date.now() - ti);# N( [5 [* Q+ e" ^% t4 X: b* f) _" Q& R
- ctx.setDebugInfo("k", k);
; W- H+ A# ~( f% |1 R - ctx.setDebugInfo("sm", kk);4 l' H/ I" V# m' o
- rt = Date.now() - ti;, s2 w* }8 l$ ]& w
- Thread.sleep(ck(rt - 1000 / fps));5 Z/ x0 W5 G' p* u0 x& l* V
- ctx.setDebugInfo("error", 0)
' P. e5 m' i6 g6 N7 _) K, i - } catch (e) { `) R9 m# W& p" n# W; w1 X7 F
- ctx.setDebugInfo("error", e);& ]! @+ m, Y! `4 G% t3 g* ]0 z b9 q
- }& q+ y: t u0 I% z" e7 H' _
- } o; ?& v) F9 Q) p' n/ A$ B
- print("Thread end:" + id);
( h+ e* o! a9 z8 {& l: [: A' I% f - }& W" {: C. M1 I$ R K
- let th = new Thread(run, "qiehuan");8 q2 n/ P! K2 z/ n4 o; s2 l. _
- th.start();! k% z: H4 G% S1 a
- }
1 E$ F' G$ T4 x" C: h% x8 L) }& I
2 [; `1 Z! u- D% `: D5 G' G; z" E- function render(ctx, state, entity) {7 a Y) w* f+ e0 j' V* p# v
- state.f.tick();
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- 4 o/ S, N) d8 T
- function dispose(ctx, state, entity) {
( A3 B+ \# `$ [% i2 X0 n - print("Dispose");; o6 l0 W5 A1 y& ^: I
- state.running = false; u8 e' Q: ?" l8 Y Z
- state.f.close();5 y1 b+ F! O- K: c( E/ K- C; _2 `9 Z
- }
( B- a/ z$ `- J. g* i+ {
, z* D7 k5 ]/ d5 c H8 z! B- function setComp(g, value) {
! l, v N0 S& v0 o. h3 L7 g2 n - g.setComposite(AlphaComposite.SrcOver.derive(value));- L+ j- l6 D9 E
- }
复制代码 $ {4 ~8 \- e7 |2 ^3 ^4 x- H7 v- r
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。. R, N" U) G. k- X# Z: R3 U
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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)
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