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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。$ S; F5 W( A: @2 _0 t! u
- importPackage (java.lang);8 i+ S# \; ?: L4 t; K( S" A5 O* P% a
- importPackage (java.awt); N! R/ d2 q8 d, ]* k; c
* B! Q4 {8 o* Y6 Y5 g0 R( V/ C- include(Resources.id("mtrsteamloco:library/code/face.js"));! a' x6 R1 g$ u* y
- ) d8 D: G+ }7 u" Y) Y* s6 }! a5 y
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {# w2 f+ l( _% b3 t! }+ `
- let frc = Resources.getFontRenderContext();
# i: c0 n4 N0 d1 d3 f - bounds = font.getStringBounds(str, frc);4 b$ |; s- S1 O, R( y% [+ d) ?
- return Math.ceil(bounds.getWidth());& b) v% U6 \# Y h6 B$ O
- }0 \6 b/ r' C0 |0 O
- ; b7 C0 m/ y- r9 Z
- da = (g) => {//底图绘制! A2 \3 c: w* z5 H
- g.setColor(Color.BLACK);
7 |# [0 J: O" K1 _& ?: U' |- s - g.fillRect(0, 0, 400, 400);
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- ! u f2 |7 c- m1 ?9 u# k
- db = (g) => {//上层绘制
k1 F; Y$ f* H; T - g.setColor(Color.WHITE);2 z& c: [! P5 g" X7 g- P/ [+ H. G
- g.fillRect(0, 0, 400, 400);' O. I2 J3 K6 C* Q. f
- g.setColor(Color.RED);* `( B& \& H4 W" p" i h% w
- g.setFont(font0);/ Z( T( u9 r7 g8 O6 [5 q% B
- let str = "晴纱是男娘";4 E: Y8 x! I& {3 m. u
- let ww = 400;& j: p4 \! \6 B/ P
- let w = getW(str, font0);
" u. v0 p, M* d) O- y M$ T' m - g.drawString(str, ww / 2 - w / 2, 200);& U7 q5 P+ r3 I4 s8 E
- }
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- const mat = new Matrices();
4 s' N& n7 y. x A$ { - mat.translate(0, 0.5, 0);1 [ O# g+ C3 Q# P7 p w% Z, a
( P% {; A1 ~5 e+ u- function create(ctx, state, entity) {
9 z+ ~ W0 O( N( E2 r - let info = {
' q* {; F2 {0 X* U9 V - ctx: ctx, w$ L3 I. Z2 d9 m# S* C/ y' O
- isTrain: false,
) V5 y$ z8 x0 R7 g% P3 c) x - matrices: [mat],! J! N( l0 B, t& {* J
- texture: [400, 400],
: V5 y3 C+ o' G: g - model: {
- Y! C0 J: ]+ c& ^, a - renderType: "light",
+ d6 ` z: b A# i' X6 @ - size: [1, 1],
/ W# U" _, J9 N6 f: S. [/ b' c - uvSize: [1, 1]. c2 E* { K# {; `* G& p, q7 X
- }
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- let f = new Face(info);
+ v9 G6 n! S2 s. k1 U - state.f = f;9 e# W& \4 ?- c# @& y! o) M
- 6 Z. k3 Y' n% a/ H
- let t = f.texture;
0 R. K3 U$ q$ q: ?" u - let g = t.graphics;
0 H9 v# a* E+ v; P# b( \8 M - state.running = true;
8 ]) ~$ H3 L% F - let fps = 24;
- B" A5 n5 C# ^" o8 z - da(g);//绘制底图
4 ?. {5 p; q6 e& K - t.upload();
9 @ G0 [; S3 M - let k = 0;, k: R* ~+ J9 i J0 Q; V
- let ti = Date.now();
' s& U, ^2 o5 n' U' z - let rt = 0;) x) d8 J/ \' y9 E4 _' q
- smooth = (k, v) => {// 平滑变化
W" s* b& Z. `( T, Z2 `: X+ X - if (v > k) return k;
1 Y' z9 @# g9 }0 F4 k, K" ?- T - if (k < 0) return 0;/ {# x$ K+ [4 w) K* D7 i T
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% q$ f5 t; A* X - }
2 F# g! J) F2 s4 P - run = () => {// 新线程9 m# P5 K8 x6 x- ]! G& ^0 k2 I
- let id = Thread.currentThread().getId();8 |4 l" m" }! Q! b
- print("Thread start:" + id);9 _* x. @2 m" ]2 J, }
- while (state.running) {9 a6 @7 i( j1 P& C3 k6 ?5 ^% \$ u
- try {4 E8 a' ^8 O( n' e) a; [* t
- k += (Date.now() - ti) / 1000 * 0.2;
7 |5 h) c I+ ` - ti = Date.now();: D- `6 [2 E* N5 h
- if (k > 1.5) {
* x$ C" x1 S6 s4 E - k = 0;
& n, m: w2 P6 r V% l. m: }# d - }
2 \# O# H/ S) s( Q& i - setComp(g, 1);
8 |* \/ l- u# x! t: e - da(g);
2 E- _6 h5 u3 K' P0 A& [- [: R& L; ] - let kk = smooth(1, k);//平滑切换透明度
' {) W8 i4 i& o P' z - setComp(g, kk);$ [3 O' ^% P$ n# ?% n
- db(g);
' B- s# Z8 b5 j/ X/ U* H - t.upload();1 |7 ~' g- K7 c, U
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) H0 M) D) B% ^ - ctx.setDebugInfo("k", k);
2 R# E& X0 H5 S# i& o: [ - ctx.setDebugInfo("sm", kk);* v; @. O6 W" V9 V% r) S/ ^
- rt = Date.now() - ti;( Q# O3 s) C9 ]. \
- Thread.sleep(ck(rt - 1000 / fps));
) p6 l2 d- [3 l( p& t% \ - ctx.setDebugInfo("error", 0)5 H4 _& t1 K7 f+ l0 i, Z# `
- } catch (e) {
% ~8 f3 \2 O, F5 v - ctx.setDebugInfo("error", e);
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- }/ [2 L+ \* H- |
- print("Thread end:" + id);
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- let th = new Thread(run, "qiehuan");
% _$ a7 U7 E/ _0 [* A - th.start();
( m, u' `, a) |+ c - }8 [+ m9 E+ L7 \, I6 Q {/ Q7 N
3 E- ^4 K" R( @! C- function render(ctx, state, entity) {
3 L' h" N i* {+ ?! r4 s - state.f.tick();
d5 c @" Q# Y8 n - }) \/ l, c" ~3 @0 p" J$ w9 R
- 0 A! J3 U, A# j, G" F1 q" A+ j. L* e
- function dispose(ctx, state, entity) {
1 N, i2 r7 W7 x" F% s$ L. \ - print("Dispose");
$ q% S: [1 n. W - state.running = false;
4 B! t- f9 o& t2 P$ e& T$ s - state.f.close();
( U0 C+ [$ i2 T4 d/ {7 w( ` - }) d# L! e8 @9 T0 H/ V8 b7 U% s
- 4 r) u4 m! e. U" o$ _2 q9 d
- function setComp(g, value) {3 w3 A+ Z% H1 K6 Y
- g.setComposite(AlphaComposite.SrcOver.derive(value));6 k& h4 I/ Q4 ~7 ^2 |, @( H A
- }
复制代码 # b; p6 I: f8 R. N7 _# \' X
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)8 g) r' b* @8 p" A$ ?. k
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