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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。' t, l& @$ O) O. I3 {
- importPackage (java.lang);
2 U2 t/ c) r0 X7 N& P4 h - importPackage (java.awt);% w$ ~; P. X. W) c; o6 w
: t! k/ z6 m- ]% Z b8 M- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);1 U0 X6 U0 J" |$ g: q, H+ [, J$ i" J: z# W
- - u" O* E9 m1 _& [2 j" m S* Y' D
- function getW(str, font) {
! d/ \3 }6 J6 e1 |5 i" E: x - let frc = Resources.getFontRenderContext();
" u$ i/ H6 h7 t! x- c - bounds = font.getStringBounds(str, frc);( [2 E3 [: {& l" f
- return Math.ceil(bounds.getWidth());. h# {- \7 e- W$ ^
- }0 r2 v; |7 l- V- V- f& W; ~: ~: }( W
- ( E7 X! H j% w! C! C
- da = (g) => {//底图绘制
5 t6 P$ S( e6 z/ P) o# L1 E/ A - g.setColor(Color.BLACK);
4 W' V0 P Z- R/ `+ L5 ? - g.fillRect(0, 0, 400, 400);
; O) y, l9 m5 Y! k; R- k+ { - }
2 f; J% r1 r8 }: U
2 _5 ~. H ?7 k- db = (g) => {//上层绘制( X' w4 C! q& B2 n- U# ]$ V
- g.setColor(Color.WHITE);
* c9 P5 Z& x! r - g.fillRect(0, 0, 400, 400);
i) ?/ O, x2 Y" F - g.setColor(Color.RED);
8 V8 k% [5 s) P, _9 Y# s - g.setFont(font0);, t( A5 l* M% B+ z
- let str = "晴纱是男娘";7 z7 a t9 i6 y+ H% b: c/ t; v' J
- let ww = 400;, o* Q5 n( {' |* n: d& x
- let w = getW(str, font0);
6 g! t( f7 }# f0 M3 F5 A1 K6 t - g.drawString(str, ww / 2 - w / 2, 200);
9 e' Z4 Y5 R& y U - }
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/ t( U% t. k0 U( ~6 s7 x- const mat = new Matrices();
5 S5 r Y! w- ?, f0 k - mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
3 o7 \2 g `0 x - let info = {2 l' [3 e, T: A( j, c) e4 B
- ctx: ctx,# `+ [+ s: I! H3 x9 |6 g7 U, K
- isTrain: false,& F3 w6 l- L2 E ^
- matrices: [mat],1 X; h( p' u/ c+ d# Z9 P
- texture: [400, 400],
! T5 b$ n4 t; G6 ~% x - model: {; @5 c7 l$ j9 c7 I
- renderType: "light",$ W/ G0 T% P$ J, q
- size: [1, 1],: B4 o6 P0 T* `
- uvSize: [1, 1]
" M% F) ?" R9 Z- J' `: m9 [* ]) O - }
9 n% P, r1 K$ b* u& b/ y3 F: h$ p0 w - }
1 w$ z9 k; `) G - let f = new Face(info);: Q- I, R/ M2 }7 s( P! D, J! x
- state.f = f;
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7 Q* o# A. x" D' ]& I- let t = f.texture;
/ a1 [9 p; r5 x6 v3 z# W - let g = t.graphics;
# E! h. |, Y% i; q! H - state.running = true;! W% c6 y+ B) |+ }7 ]4 V5 g
- let fps = 24;4 b" }9 u7 M/ X, k8 }
- da(g);//绘制底图. N' O' U; f% e+ ?
- t.upload();% g8 M. {4 R. v" n; x" W+ `
- let k = 0;+ ]& S0 q! u% R( e& O$ S( s6 y2 b- e
- let ti = Date.now();+ e+ F5 p6 R/ p) O' ]% O3 T7 S. N& n
- let rt = 0;
! f$ h M6 }$ J0 n. p% M) t - smooth = (k, v) => {// 平滑变化1 q4 S" k& x+ B$ y) m0 M2 T% O
- if (v > k) return k;' g4 h$ o& _3 I8 I+ C: v" P% [
- if (k < 0) return 0;; I7 i u5 ~7 Y/ g2 K9 L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
" |) j; W# b5 Q6 V# Y8 q& H - }
& [% h+ A8 v- b6 J. _ - run = () => {// 新线程
e+ o- B% {6 k$ d/ ^1 d - let id = Thread.currentThread().getId();
& ^! N% ^* I/ U& B) W* ] - print("Thread start:" + id);# e% G$ o9 @) i, F+ u6 J3 @" H
- while (state.running) {
( F) q2 J+ I8 O- } - try {
+ Q/ g- f! Y. S3 _4 f: N - k += (Date.now() - ti) / 1000 * 0.2;
9 X* ?( R2 O; U8 ] - ti = Date.now();
7 g" p V6 ^5 O* b j/ K - if (k > 1.5) {8 r6 ^5 n0 Z5 X4 T( N3 K
- k = 0;
4 U# |3 n! i: ~; P - }
- d0 P; Y _' |; g, Y - setComp(g, 1);" g( r1 b. [+ i) Y7 u
- da(g);* x* |3 H: u. M' W' X0 G
- let kk = smooth(1, k);//平滑切换透明度9 o3 t/ D0 f2 h, P" P! Q
- setComp(g, kk);
+ l- m% ~6 Q8 S/ d o - db(g);; V" N" f) H" V$ P0 g6 k
- t.upload();+ i6 U- u8 d% U$ w
- ctx.setDebugInfo("rt" ,Date.now() - ti);
" @# ~8 r# a! V7 y; J& B$ B- ` - ctx.setDebugInfo("k", k);
: f( |' c, s8 W, P - ctx.setDebugInfo("sm", kk);) R- l7 ]5 k8 u4 P' m# h6 }4 U
- rt = Date.now() - ti;8 W: N+ |! L7 a" }
- Thread.sleep(ck(rt - 1000 / fps));
4 o3 k2 w+ U h: _2 N) _5 | - ctx.setDebugInfo("error", 0)
5 F9 q" _- O- ~/ `% D - } catch (e) {; d$ B3 W% C- @- p a6 K
- ctx.setDebugInfo("error", e);
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- }
' u* n/ W1 ~, f - print("Thread end:" + id);
, V: J$ n; Q2 O& k - }& m7 ]/ _+ k! K
- let th = new Thread(run, "qiehuan");
+ A6 B8 @% I6 G- o( I2 K - th.start();, W; p( G2 n- K( Q! _+ o
- }( j9 T" U7 z6 x9 x( W+ ~
5 D( q. t* X( k2 D8 A6 V4 o, k- function render(ctx, state, entity) {
, Z$ ~) n3 J0 g/ ~5 }, ~ - state.f.tick();/ ?* w$ Q7 ?6 A4 e& z
- }. T6 a1 {: y8 j2 g4 z3 g" B
4 v0 Q; s3 x1 b5 E% W3 r5 j- function dispose(ctx, state, entity) {: F. h' k6 H% x W# n2 }
- print("Dispose");8 ^, s& l+ |4 F7 e
- state.running = false;
8 Y2 C% v( h6 F* W; X8 b. o - state.f.close();
+ m0 W$ \0 C( [ A# A+ }* D - }
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6 V5 L8 b% i8 I& m O+ E2 ]5 w- function setComp(g, value) {
8 |( D V9 U B2 @. C' J! f - g.setComposite(AlphaComposite.SrcOver.derive(value));$ A; D$ ^/ F5 L( a) J3 R+ Q- `
- }
复制代码 5 t$ Q$ s1 v2 G3 {! \
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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+ j* y# E! r+ m ^6 v2 y0 u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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