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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。0 y! I8 ^8 f7 a+ l2 A% K4 Z' m
- importPackage (java.lang);' W X/ J7 @1 z( T/ c% B4 {+ v) K
- importPackage (java.awt);/ S$ |' S; e+ [/ y H9 N1 u/ ]
- / d" b- @7 S0 n+ g8 L4 a
- include(Resources.id("mtrsteamloco:library/code/face.js"));: T5 L6 t5 Z5 T
- $ ~5 R$ W1 k! d8 a: u) j4 v
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
7 H7 d4 ]* Y0 m% ^ - let frc = Resources.getFontRenderContext();0 b' S" H8 ^, n4 K% k
- bounds = font.getStringBounds(str, frc);1 B5 I: @9 G' u: O
- return Math.ceil(bounds.getWidth());- e3 Q* t) V& H( x
- }
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5 y" @' I: L' W1 X( ?& h- da = (g) => {//底图绘制, B: Q5 v/ d y- x! [9 o7 N& W/ c3 \
- g.setColor(Color.BLACK);
) T" T; P x. k. X \ E( Z9 ?4 b - g.fillRect(0, 0, 400, 400);5 N) _* H& M# p1 t- j4 I
- }
% e2 E: t8 [0 C# b- W# v W5 a
" Z' |6 C" V; b) A2 \- db = (g) => {//上层绘制; p1 l( s" s: X1 v! G2 E
- g.setColor(Color.WHITE);7 \& B9 K2 d2 ^" }/ s2 }
- g.fillRect(0, 0, 400, 400);( S" q# ^9 ?1 O3 `6 O9 h
- g.setColor(Color.RED);/ p$ P. Q# G9 v6 H' v
- g.setFont(font0);
# K2 N2 y$ [5 n, C+ d, e - let str = "晴纱是男娘";
- F) R+ U3 }5 L4 V* _ - let ww = 400;
6 q; |% U7 U+ m - let w = getW(str, font0);
- H& g8 { u( d - g.drawString(str, ww / 2 - w / 2, 200);
$ n7 ~7 a% @0 s& A7 g- h - }
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4 o! A+ S$ h; Y0 C- const mat = new Matrices();
% P$ k: I2 @5 ?* }# P* s; H - mat.translate(0, 0.5, 0);" }1 m& {, j( G: J2 {8 f) r3 _
- , A6 [0 o. b& R |9 H6 H
- function create(ctx, state, entity) {
: T9 R+ n) P1 h# H - let info = {2 _5 w* B7 Q s) Q5 `2 w% O+ M2 z
- ctx: ctx,% ]# K1 [1 r$ K# ^7 {; i. U1 \" I
- isTrain: false,
6 ~. M9 E) g5 _' ^7 } - matrices: [mat],* @, p5 b9 P. p' Q
- texture: [400, 400],. w$ H9 X9 d: H
- model: {
% N! [: s% a1 K: S( a1 P. j6 X) G - renderType: "light",
; H* x3 J5 o4 c8 m* x# R - size: [1, 1],1 G* w7 Z- \/ B: o, W% k
- uvSize: [1, 1]& `. N% K a; H% P- v/ k
- }0 d/ O" U- f# P5 j
- }/ M+ E5 L, q6 Q1 Q
- let f = new Face(info);$ \% P* C8 H7 N
- state.f = f;9 I* E$ `- X* ?3 K" J
6 Q# ]( Y* j9 _! g( B! V& v# ^) L- let t = f.texture;
* ?' A3 V7 `/ M; X9 U - let g = t.graphics;
2 h8 m4 i" R, A/ C3 `, B: V - state.running = true;" P6 L6 v/ z9 w6 t
- let fps = 24;
4 B# _; U( e# f - da(g);//绘制底图" u4 s& S- i2 [
- t.upload();8 f- @1 h0 Z" D
- let k = 0;% C8 j, I3 ?& j
- let ti = Date.now();8 C# Q7 `1 `; `& P* A; m" b4 i
- let rt = 0;& `" ]! X' Q0 X3 e2 z v
- smooth = (k, v) => {// 平滑变化! n, K. X) y3 n
- if (v > k) return k;$ a" k7 H H! ^+ F6 z7 C
- if (k < 0) return 0;
0 E% y$ V& s# j2 Q0 V4 c( ^ - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
& M T, v6 m1 r0 a0 ?" Y - }
+ {+ H1 [! U( [8 n9 _ - run = () => {// 新线程, p3 a1 q6 c/ B) h$ n8 O* ]
- let id = Thread.currentThread().getId();( z; w0 D4 B1 R& O* g
- print("Thread start:" + id);
- W! C$ C& b5 m* N; e. ~3 I0 p - while (state.running) {
4 d, x& @% C% d - try {
8 X. P! G8 |+ T6 L: t9 N5 _ - k += (Date.now() - ti) / 1000 * 0.2;
% U+ B% _1 n( E% J& n4 Z - ti = Date.now();
7 X" r7 ~/ m# v( a+ _" T - if (k > 1.5) {
9 A6 F' |: |$ o - k = 0;
+ G& r6 V* T% B/ G0 \ - }
2 U2 L2 f' N3 E8 q( Y2 Z - setComp(g, 1);
/ |1 j. w2 E- l. C - da(g);1 u2 |# E; O+ C6 O# D; C8 r
- let kk = smooth(1, k);//平滑切换透明度
: c" f+ D1 n1 M9 h% r - setComp(g, kk);+ w9 m; ^' I, K. n( T4 h. `) t
- db(g);
" ]% m# \4 y. T( q - t.upload();
' B3 ~" l% i7 Q+ d% k - ctx.setDebugInfo("rt" ,Date.now() - ti);8 k [- H* Z* g5 z A; {9 M
- ctx.setDebugInfo("k", k);+ b3 Q* R0 J9 e6 x& I( |2 k0 m
- ctx.setDebugInfo("sm", kk);
% [, s6 T$ V' P: G - rt = Date.now() - ti;
( H5 d9 b+ Y7 E, B# A - Thread.sleep(ck(rt - 1000 / fps)); F+ {+ }# q" ~
- ctx.setDebugInfo("error", 0)/ x4 r2 I/ O2 ^. V+ f
- } catch (e) {
5 }( e( U y5 Q2 |1 t# t0 |7 g - ctx.setDebugInfo("error", e);
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- }# O4 g( f+ s# ~% J8 o$ Z2 `' A
- print("Thread end:" + id);1 X; G* M3 S1 a/ p8 c3 _* y3 A* a
- }
( Z. o5 a% T$ Z( N7 E9 c! F - let th = new Thread(run, "qiehuan");+ c1 |1 b( K& I" M! ~
- th.start();6 W! y' e6 z# P( P' H6 e3 C
- }
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- function render(ctx, state, entity) {
) h6 U/ t% l. e) e7 o" J% N - state.f.tick();, h' g2 a; m) ^3 z/ H& i
- }
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- function dispose(ctx, state, entity) {" I: R9 p3 U5 H: g2 N1 w0 n
- print("Dispose");
5 I! T, f! r/ S - state.running = false;
* u: ?4 N% O+ ` - state.f.close();3 w! m" O- d3 D) G
- }
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! K! p4 D( r+ q- o% a% Z! w- function setComp(g, value) {
1 I- i+ o7 M8 G" F - g.setComposite(AlphaComposite.SrcOver.derive(value));. d5 B$ b2 p8 X2 U" j) f
- }
复制代码
8 }- M+ u [% |0 Z/ V8 g$ ^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 v G% p ]: R I* X
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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)( @1 f* |2 x, N0 c$ T/ f
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