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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。9 T Z; h9 H$ l3 i% U
- importPackage (java.lang);
! v: [# i: h; H0 A! H% Y. f2 l - importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);+ m+ k4 e) t) v- t, Y6 n
- 2 F. y$ Q$ \$ Y# J
- function getW(str, font) {
( B( Q" U) K; O - let frc = Resources.getFontRenderContext(); L! K2 ^" B A% I
- bounds = font.getStringBounds(str, frc);; |2 ]; X8 U. w$ B( M: Z3 p
- return Math.ceil(bounds.getWidth());
' Z4 q" k8 [% N, ?7 H - }
- N1 Y+ o7 T" Q7 c% ^+ A - ! `# x9 ~" C, l
- da = (g) => {//底图绘制
( M& {8 t* V0 q4 h: j" I - g.setColor(Color.BLACK);# g4 I6 V' D0 @
- g.fillRect(0, 0, 400, 400);+ e J3 I( y' d( ~# [
- }9 N, T& N. M5 s& E& |
- / {1 P* ~ W9 ^
- db = (g) => {//上层绘制4 h( S0 l! f! I: w* F9 t* A) w
- g.setColor(Color.WHITE);
% e4 C& N, `) I# K7 c - g.fillRect(0, 0, 400, 400);) s" o) q8 `& Z2 q4 k @' K
- g.setColor(Color.RED);4 ~ p# T, Q# S$ x3 p. S
- g.setFont(font0);1 v' E& Q& k3 x$ u4 b1 L
- let str = "晴纱是男娘";
- r d- H6 b4 M9 P3 Y8 p, Z* X - let ww = 400;$ N0 |* P" e6 J" w
- let w = getW(str, font0);, `' Z! o! r" L; Y
- g.drawString(str, ww / 2 - w / 2, 200);
3 C/ Q/ c5 I& D- W - }
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- A. `# T. \( z# P n I- const mat = new Matrices();
' L1 n6 ^. S1 k& Z/ G1 m2 c3 j& q - mat.translate(0, 0.5, 0);; E0 Q1 k: w; j$ a9 E" }0 H' n3 ]
- 7 z- O$ f" M4 Q2 I; r; G& m
- function create(ctx, state, entity) {* c- D4 h/ K/ y! ^3 ]' U
- let info = {0 F" K. l9 i0 g
- ctx: ctx,
% d0 D- p1 {0 {$ ?3 F4 t2 v - isTrain: false,( x6 b) F8 c b' q9 w$ j
- matrices: [mat],
! C! n; g/ E) Y! j7 f - texture: [400, 400],/ S7 E/ B- k; U% [
- model: {
' D9 n9 ]# R# ?/ q3 i/ I1 f, y$ } - renderType: "light",1 g# I2 t" k6 i* W9 `4 v
- size: [1, 1],
8 Q6 W, q" A* X0 D - uvSize: [1, 1]. D c0 S s+ T+ ?+ o |# _
- }
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- let f = new Face(info);% U8 ~9 d' u. y% r2 y5 j. W8 ]5 r
- state.f = f;
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- let t = f.texture;8 Q9 \9 r8 K9 Z, c" l- b+ b
- let g = t.graphics;' p+ o" `3 v1 E% q- t
- state.running = true;
; l L0 I3 ?3 o/ W+ Q: f1 g - let fps = 24;3 O/ Q3 F3 D# F( C( A* a
- da(g);//绘制底图% O! N$ y) @4 w( g
- t.upload();
9 U# y/ _+ n2 v( p2 X - let k = 0;7 R3 m3 G7 }+ h
- let ti = Date.now();
: H6 c$ v3 |2 Q7 K/ j% R - let rt = 0;
: U9 U; p. Z8 u9 o& H+ N - smooth = (k, v) => {// 平滑变化7 ?9 P; s* G$ N5 z
- if (v > k) return k;, B% B2 o, I$ y6 ?
- if (k < 0) return 0;' ~2 o- D6 ` g
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程* b, ~* v& W& @5 ^7 G, L( l
- let id = Thread.currentThread().getId();, G$ l: M g# L& @# d
- print("Thread start:" + id);2 Z8 i5 y9 ?5 D" E+ `+ J
- while (state.running) {" g" ^* ]0 O( O" M
- try {
N9 `; b/ ~1 c. \! R. D - k += (Date.now() - ti) / 1000 * 0.2;* }+ }5 f& k+ {7 M7 d) t! X# M
- ti = Date.now();# m* t6 x9 a4 r5 @6 w7 N8 u, p
- if (k > 1.5) {
: n1 C% F8 ?$ q$ `* ? - k = 0;0 c8 N1 I" N; ?, _8 f; i# l& M
- }8 z/ W; m, g/ ?# m: p
- setComp(g, 1);
o* k9 _$ v5 K* _ - da(g);! w5 J r$ ]2 L6 ?0 s2 f4 v: ^
- let kk = smooth(1, k);//平滑切换透明度
% B( ]5 K; W( W2 A* Z' | - setComp(g, kk);7 g- t% R' K3 t2 S6 f$ z/ R
- db(g);
3 z2 H6 n; k8 |/ k# S( `7 i4 {: q - t.upload();
6 p$ s6 Z# U: I' ?: {1 i - ctx.setDebugInfo("rt" ,Date.now() - ti);% f0 X9 Y6 h* X, N) D
- ctx.setDebugInfo("k", k);; f) S, S9 R( q! G
- ctx.setDebugInfo("sm", kk);9 I& h7 H" Y- |( M. }( K. j
- rt = Date.now() - ti;2 l9 C3 e6 x L5 B! J2 w
- Thread.sleep(ck(rt - 1000 / fps));
+ E; k. A1 e5 A; R8 m. ^5 d I - ctx.setDebugInfo("error", 0)
7 m+ B" y T* x% v. p - } catch (e) {
" E. w0 w( ]& f5 {( [; U7 }. N! T, L; N - ctx.setDebugInfo("error", e);
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- }
8 K8 I% o j; a" ~0 r - print("Thread end:" + id);3 ^( L j; v% M# z; q
- } V9 L; o" Y L
- let th = new Thread(run, "qiehuan");
X7 @ n5 H5 B9 I A$ c( v - th.start();
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! b0 W5 p& \9 q* e$ C6 [1 z* _- function render(ctx, state, entity) {% w6 g, V! {9 Q9 Q
- state.f.tick();$ K4 d1 `& _5 ~. I3 P& t9 ^
- }. Q/ U/ ?7 u8 ^; r9 a: G' Z
1 t% {8 V6 c: m. F0 n- function dispose(ctx, state, entity) {
6 c& }" |4 L. a7 ~$ y# E$ q, A - print("Dispose"); G+ u6 ^& R& X) t H, X
- state.running = false;
, Q; K5 x: x; n6 @- c - state.f.close();
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0 }! U% s/ u! D5 |- function setComp(g, value) {: i0 e# E4 }) d. _( ~
- g.setComposite(AlphaComposite.SrcOver.derive(value));
* S0 u5 C# s. X* Q& _9 h - }
复制代码
- e5 T% N( ~- Y1 k( f4 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。
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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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