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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。
p4 P' ]& F; o- importPackage (java.lang);: ~$ V6 l! U( e1 g
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js")); C" x0 G$ n# K9 O. g y
- 9 I, W& C5 O- l- H" z
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {
( l/ C3 j6 Z) n0 V# V K: f - let frc = Resources.getFontRenderContext();
, d9 G- n4 r( p - bounds = font.getStringBounds(str, frc);3 f1 j/ z9 _& w" Y
- return Math.ceil(bounds.getWidth());
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- 7 Z1 @4 b5 x- [
- da = (g) => {//底图绘制2 Y; w2 H: F/ T
- g.setColor(Color.BLACK);
: `4 B2 B3 b8 f0 q0 v8 I1 ` - g.fillRect(0, 0, 400, 400);
3 I" I* P! n0 Y8 y' a2 q+ I. Q* } - } r5 p' {8 F; p; f7 @. S
" M- r9 s, l5 h2 `4 m- db = (g) => {//上层绘制) c+ E0 s* Z- L) K) x. J
- g.setColor(Color.WHITE);
I! G% o- Z7 p' A+ I6 y, }# C - g.fillRect(0, 0, 400, 400);
5 Z! z" i) j5 i - g.setColor(Color.RED);: n2 |/ f6 \; b" A' z5 S$ t5 Q
- g.setFont(font0);
0 V# Q6 j# G% j' m5 v1 V - let str = "晴纱是男娘";! g8 d! r' \4 l8 k- _2 }
- let ww = 400;8 V4 j+ a( [5 V) K0 y
- let w = getW(str, font0);
9 E2 Y0 r' O: t$ J! ~ - g.drawString(str, ww / 2 - w / 2, 200);
$ u; }$ o; G. m4 d; b - }
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; Z, ?6 K( ~5 [1 S$ D9 k( e% r- const mat = new Matrices();
# j/ ~; N8 T9 G2 F" P - mat.translate(0, 0.5, 0);+ `" F, q2 ^# q
- 2 w+ ?' A# ]$ h$ M# N ?. D
- function create(ctx, state, entity) {
Z. N. o0 Q: H: O6 i, q0 Y3 q0 P - let info = {
) d& {& D2 `5 x! h+ A1 ~ - ctx: ctx,. m6 z; n# O) ^3 H5 P h
- isTrain: false,+ G+ Q; ^' \6 g2 c7 A- Q# r
- matrices: [mat],
* I: |* P6 u6 Q# B - texture: [400, 400],. \+ `5 D; I/ J, z$ J+ V0 X
- model: {( |4 G: q. s# [' w: n) |8 V
- renderType: "light",
/ Y6 @$ [ n, c- U - size: [1, 1],2 r% T0 w- n9 I k
- uvSize: [1, 1]& a9 w- f% E1 ~! \
- }
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- let f = new Face(info);7 g% V# {; U/ X3 J# M7 D1 l
- state.f = f;. M" G& V! H& r E, h ]& P
- 9 p' V6 r Y, ^ B
- let t = f.texture;& L3 O+ k' |; `; F7 q$ S
- let g = t.graphics;( k, B% e% l9 B' {# r3 J( I
- state.running = true;6 ?7 E* w9 H8 x$ }. c4 _
- let fps = 24;' e8 H# C% S. [+ `2 Y
- da(g);//绘制底图
3 X D$ c) X0 v8 C0 {: g1 T8 b - t.upload();- S8 \0 x9 M5 {# r6 r, B
- let k = 0;
% E/ V( f" O# R: L4 o, E - let ti = Date.now();
8 y; d) F, w& z* O - let rt = 0;. _4 {7 b) B9 A7 C8 [# @" Q
- smooth = (k, v) => {// 平滑变化8 |" z5 k/ C$ F1 Z2 k; }9 t$ u
- if (v > k) return k;1 q4 O: {% D+ U" Q0 _2 n# V' x
- if (k < 0) return 0;
# |+ W6 M8 H. M7 h8 ` - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: J+ p0 l7 K @6 C* S9 { b, d* f. t
- }$ V/ o1 J# p, A
- run = () => {// 新线程5 U$ ]: S, T' T3 L! I! d
- let id = Thread.currentThread().getId();
0 G# `! M. a* V3 [7 I - print("Thread start:" + id);+ _; h+ ^% y7 y
- while (state.running) {
' _" z( s! b- M1 R8 R' c& @* y% R9 E - try {* A; k& F. L: L) g- F; p
- k += (Date.now() - ti) / 1000 * 0.2;9 P5 S! C& \2 c, w% @
- ti = Date.now();
. w" @5 l+ c) ~; p* q# ~4 \- k - if (k > 1.5) {
{& V E$ h2 T1 ]* { R - k = 0;
# s: a# J C, g; ` - }
& T3 S; p6 A! w7 h, Y% C3 s* g - setComp(g, 1);/ E; a0 p. o* l% W+ {* s: P# C
- da(g);
/ d8 T! x& a3 p5 ` - let kk = smooth(1, k);//平滑切换透明度3 U* _0 @& z0 \ w" I7 N
- setComp(g, kk);
. A+ k' ]- p7 c5 k' [/ j - db(g);
$ A) t* v# l# {+ S/ D- H1 \0 b% [3 q - t.upload();! h# ?7 P. @# ^! k
- ctx.setDebugInfo("rt" ,Date.now() - ti);6 \* @' L3 c- I) }3 }/ p
- ctx.setDebugInfo("k", k);, H+ U$ i. B$ I- v
- ctx.setDebugInfo("sm", kk);
9 G6 x" B& {, l8 {7 B - rt = Date.now() - ti;
; g/ a- E6 s- x; ~& G: u2 M! X& P - Thread.sleep(ck(rt - 1000 / fps));
0 I! H9 ~3 Y+ P4 X" ?( j' ? - ctx.setDebugInfo("error", 0)6 ~% i6 } O' y. b* c) `1 T
- } catch (e) {
1 ?" S6 M; v) E: p9 h6 }1 x - ctx.setDebugInfo("error", e);
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- }
6 N0 c- a7 K+ P0 e7 |. w* q - print("Thread end:" + id);$ J1 T( o4 Z5 M7 g2 F' b' S6 J
- }) |4 R, F7 r. n3 Q) P
- let th = new Thread(run, "qiehuan");
' S: T* h9 d0 i4 E# \ - th.start();- k* k6 [* y/ k, b% d
- }5 z9 _5 a; J# a7 I
- ! }9 N, h; g8 N' a( ^# K6 z/ h! w! V3 O8 J
- function render(ctx, state, entity) {- e) ]9 y/ A) i2 n% L8 w) x7 K
- state.f.tick();# f& q2 t# `7 i& H! M
- }( b; Z1 Y$ I: J5 U1 O) \4 _
- 6 m! q$ \$ n; |% D t
- function dispose(ctx, state, entity) {4 D9 f5 N! l( C. }
- print("Dispose");
0 [- |. ]4 Y" J) [ - state.running = false;
+ I7 l4 X2 F3 m, C& G - state.f.close();
K! B) r. Y4 e) _9 j5 E - }
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6 u: Y0 @" O8 F6 e, A/ S- function setComp(g, value) {
3 V! a: d0 V' ^" ?1 { - g.setComposite(AlphaComposite.SrcOver.derive(value));# {5 t& Y; U, W
- }
复制代码
: i! r! Y' v+ K2 ~( ^( b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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5 y, j4 u, ~# t顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( V# b8 Z" W T! f# s
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