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0 w- m+ [$ }* q! E- x3 l7 V& j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。
3 |- u* S9 K: N. f- importPackage (java.lang);& }) g* D6 e+ u% O& j
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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9 F. H0 B9 b) H4 j- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);8 }+ J0 T& g' Y
- # T. _4 V* O2 `- i* R A- v4 z2 }
- function getW(str, font) {& p1 ]( n T j5 n4 J
- let frc = Resources.getFontRenderContext();
7 y0 c5 P' M7 S - bounds = font.getStringBounds(str, frc);( i, P! x, E9 m
- return Math.ceil(bounds.getWidth());
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- - L5 E' s% i4 Y$ T# W
- da = (g) => {//底图绘制 {& q( {, x' M- l9 S$ A/ {; l
- g.setColor(Color.BLACK);
/ `$ c7 s+ e: G: f% n - g.fillRect(0, 0, 400, 400);
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- 1 _# Z4 l d: L
- db = (g) => {//上层绘制
4 ~5 Z( Z/ y2 Y( ?; a - g.setColor(Color.WHITE);' Z! z$ I. h, t8 u" g
- g.fillRect(0, 0, 400, 400);
$ U8 U' @7 a3 f! q, U1 s, I/ V) U - g.setColor(Color.RED);
o% O- U& T5 P9 \$ z$ k! z9 v9 U9 j - g.setFont(font0);
$ k: u b( g; Y) c - let str = "晴纱是男娘";9 g5 d2 Y- J9 B$ C
- let ww = 400;, [5 N3 B/ u8 @
- let w = getW(str, font0);6 A: q7 U7 d0 N6 D+ v
- g.drawString(str, ww / 2 - w / 2, 200);
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- const mat = new Matrices();, K, u! A1 L2 n
- mat.translate(0, 0.5, 0);+ F* j& x4 O- R1 f/ w
+ v+ f4 W/ x2 H& ], C- function create(ctx, state, entity) {
) L+ U+ b( L9 L9 D1 I0 O. T2 S - let info = { K0 E T ?. q' L: a3 B! D
- ctx: ctx,/ a5 ]2 Q. ^/ z8 H7 }
- isTrain: false,5 ?9 `3 c9 e1 G" P1 `
- matrices: [mat], \1 T0 O( Y* s2 F, z. H. h' j4 d5 J, o
- texture: [400, 400],
9 U" V; ?4 N2 a/ d& X - model: {& M3 y1 D6 `/ O* Z- `. W
- renderType: "light",. J" t: F" w2 s q, R
- size: [1, 1],; p$ Y% U9 |, _; M
- uvSize: [1, 1]2 D9 g* P+ u5 V- U5 O
- }
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- let f = new Face(info);
4 e& a8 Y/ l1 y - state.f = f;
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) R$ O* t: h5 D- let t = f.texture;$ \) R8 C. z, z# c5 ^
- let g = t.graphics;% b3 {, k! M6 i+ V$ h( l5 {
- state.running = true; Z( a: e! S" t# j+ c
- let fps = 24;
. z4 E" @! a! Y0 D4 ^ - da(g);//绘制底图- z* W$ z* P0 x8 f! d
- t.upload();
0 j8 f- T) i* `" f - let k = 0;
s& A& ?( |) R o; l - let ti = Date.now();
( g+ [+ e. n! p& P; g D - let rt = 0;2 W- h+ L f. a
- smooth = (k, v) => {// 平滑变化
' y3 [+ C5 u4 U& w& e- x - if (v > k) return k;
* @) e+ t$ z- f$ X+ A9 R - if (k < 0) return 0;3 g- a, y$ @. S1 n& k. P
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
* m0 J' m n8 s6 y1 B \" h- b - }
" T1 V' O% R4 m2 G2 \1 ~# c - run = () => {// 新线程* h2 U5 N8 Z, p+ m# {
- let id = Thread.currentThread().getId();
/ \- a: [1 r) G( }: } - print("Thread start:" + id);2 A% v+ r3 I0 R- B; }; }/ i; G
- while (state.running) {5 \; n- x0 t' X
- try {' Z9 B; L1 G1 `# \
- k += (Date.now() - ti) / 1000 * 0.2;* D, {6 B' K( ?# c" J$ h4 z( z
- ti = Date.now();
' |& Q" {; U' e+ u; E) X - if (k > 1.5) {; }- \8 z0 T3 p( G2 `! {. p
- k = 0;; {( U! Y. q# G' V1 u2 g/ B
- }
& w( q8 s4 ^- ^% F - setComp(g, 1);8 T/ V0 N- K' E# M
- da(g);+ F+ U$ [# C4 U% j/ t6 `
- let kk = smooth(1, k);//平滑切换透明度
# E: W9 ]8 k6 j8 m2 o - setComp(g, kk);8 l& B1 H/ j7 s
- db(g);) }$ @: Y( @' @6 p. Y- m" J1 j
- t.upload();
, c2 {/ d i6 i& H" N& w - ctx.setDebugInfo("rt" ,Date.now() - ti);
$ q. _7 ]! C* u0 f0 B - ctx.setDebugInfo("k", k);
& \! A2 o* { a# q* Q: a - ctx.setDebugInfo("sm", kk);
8 E) [4 Z% u- c - rt = Date.now() - ti;( A: @( K! _1 s* ^1 a% w2 I
- Thread.sleep(ck(rt - 1000 / fps));' K% I! ]: x9 e0 C( l
- ctx.setDebugInfo("error", 0)
) o$ R1 F. i. G; T% o2 X - } catch (e) {& a( V% m& D6 P5 U w, W
- ctx.setDebugInfo("error", e);# N8 g# q2 S7 a& P% A d
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- }' g( P7 ^+ r3 e8 G g
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");8 B/ o+ u$ s0 }- F& x
- th.start(); G; L1 T0 ]3 K
- }
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$ e9 n% q% J0 `- function render(ctx, state, entity) {
( {- f; @3 I& _+ A% y1 i' t - state.f.tick();
% S( Q4 c/ S! L H4 c - }
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& q0 ]0 k# p3 G/ ~ ?+ N- function dispose(ctx, state, entity) {
. d' q7 [9 C9 u' X; `7 e - print("Dispose");( z7 ~; X" v' V3 e" o: _; J
- state.running = false;
" R S# y( h0 H" x# i$ O# y# U - state.f.close();! p: w8 J# b) l7 {. a
- }
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5 j9 L* J) N: p8 e- @! d8 K- function setComp(g, value) {" r- E' T8 N, ~: f+ i
- g.setComposite(AlphaComposite.SrcOver.derive(value));
1 F9 ]/ c- _& e6 \: W8 t! R O4 W# `; q - }
复制代码
3 |% V$ z5 d/ B$ y* l4 Q# 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。
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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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