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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。8 x# U, g% V. v8 O
- importPackage (java.lang);
6 j: G5 r3 f1 V6 o - importPackage (java.awt);0 E$ ]* Z% a: K# B% A
- % Y* E2 i) ~8 [/ U1 U6 Q. G
- include(Resources.id("mtrsteamloco:library/code/face.js"));; p3 S, V) l3 g
- 0 p7 M- C& R8 X1 S
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {3 N% D9 i6 R2 s( K
- let frc = Resources.getFontRenderContext();" J; S- T0 n$ [/ `2 ^
- bounds = font.getStringBounds(str, frc);
% A6 R3 U6 V4 z1 U" T+ L - return Math.ceil(bounds.getWidth()); [: c: F" p. |
- }
" X3 K6 T: L: M: q ^+ q' F: L - 1 P, G6 q! j& {
- da = (g) => {//底图绘制: |# ~" [8 [& w* K& t# T2 H- y6 q: T
- g.setColor(Color.BLACK);5 x7 {* z; c( ]3 @9 n% B0 X6 N
- g.fillRect(0, 0, 400, 400);
) S: \ U6 B5 Z1 m! I3 e+ z8 R - }
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4 s9 Y- P' F5 I ?! E+ g# E- db = (g) => {//上层绘制, T( U- d8 [ H7 q
- g.setColor(Color.WHITE);
0 w$ K! k0 |' h+ j c. y - g.fillRect(0, 0, 400, 400);/ U) v* @. l5 k+ k# p
- g.setColor(Color.RED);; _# K* j/ s8 o
- g.setFont(font0);& p) n' C3 R/ D
- let str = "晴纱是男娘";0 w2 G7 |5 |# ~4 G. n [
- let ww = 400;/ Y% C$ ~" ^, q" Z5 y( E0 q
- let w = getW(str, font0);0 E" @, z- V7 p! X5 ?$ Z
- g.drawString(str, ww / 2 - w / 2, 200);5 E% H. Z8 O* Z& a6 ^ }" ^
- }
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- const mat = new Matrices();0 ]( l% _! S- L, ]
- mat.translate(0, 0.5, 0);
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w4 Q% S: Q* f6 e# E* l- function create(ctx, state, entity) {3 ^2 M, ]; ~" z5 z
- let info = {9 ^2 V1 U' q. c3 w& k: L6 H; U
- ctx: ctx,# u+ {& ]+ `' H, F- v& Y) {6 B$ |
- isTrain: false,
: N' Y8 R$ _9 n - matrices: [mat],
7 V) n, O: V& N$ J, P - texture: [400, 400],
! p. D1 B' y/ b - model: {
8 g; j. @. A2 @0 Q1 D8 r - renderType: "light",
7 P! M7 i& i$ g4 }( R: [9 p - size: [1, 1]," ] }" r; p8 k7 B# M7 B& A* @: _. G
- uvSize: [1, 1]
8 h5 t h+ Z. Q2 T+ | - }
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- let f = new Face(info);
0 n0 y: ]) t( ^6 F8 H+ o9 l - state.f = f;
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- let t = f.texture;8 z% h% P; w( n6 W1 m$ }
- let g = t.graphics;" L" p2 Q" f1 g3 A
- state.running = true;0 t7 b. ?; Q4 L0 d" V. {7 N |( l A
- let fps = 24;
# W V9 C* W4 l2 y( h s) c - da(g);//绘制底图
+ Y6 \$ @' z$ S+ O; X - t.upload();
) g; ?9 y$ ^$ j5 s - let k = 0;
: d( r+ Y K! I& z - let ti = Date.now();% z+ h4 j: J" w Y# k! r1 R
- let rt = 0;
8 d0 `% q! p; e - smooth = (k, v) => {// 平滑变化
4 t9 {) }8 r( R9 ]3 Y) l( C3 D - if (v > k) return k;, \7 o2 x, K Q0 d8 p$ R, t1 X" O
- if (k < 0) return 0;" Q2 t$ Q7 W8 R3 U# \7 M$ d2 X
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: ^0 y( D5 P8 C! ~2 x
- }! z6 z% J7 Q/ W0 F
- run = () => {// 新线程
: H, f6 Z, s9 S( x0 t - let id = Thread.currentThread().getId();
4 ]5 s) m6 H: M1 `7 x - print("Thread start:" + id);
- C& N) A' J! P* w" V3 P a9 F8 h - while (state.running) {3 s9 ^+ @# j+ q% N( d" i: Z
- try {
; Q2 _! z' t% f. k - k += (Date.now() - ti) / 1000 * 0.2;3 |9 V! x* S5 Q% P& @' N# b+ w: ~
- ti = Date.now();7 w6 F7 ~% H7 I
- if (k > 1.5) {/ q7 d% [, N* i. m& ]8 X3 {1 b$ B
- k = 0;& c( ]- ~2 a' w5 s1 k7 |
- }, y6 |- p& }3 `# D m
- setComp(g, 1);
' l2 E$ U) q G- D - da(g);; ]: u/ R0 L- B3 ?5 V
- let kk = smooth(1, k);//平滑切换透明度
& w0 w: |3 c- z T$ X3 M* C - setComp(g, kk);$ ~8 J! m5 t) U/ l, k p# M
- db(g);
" `- N- Z/ ~' l - t.upload();
+ y! R: @& [0 b6 A/ K- G - ctx.setDebugInfo("rt" ,Date.now() - ti);
& p0 Z/ G1 u) F, t - ctx.setDebugInfo("k", k);
7 ~, h+ ~" \" D% _$ {! w! v - ctx.setDebugInfo("sm", kk);1 R( Y( o7 ^$ c. S% H/ F' J5 O
- rt = Date.now() - ti;
m) C8 k+ e" ~# m - Thread.sleep(ck(rt - 1000 / fps));
& B) T; b3 Z6 Y/ T - ctx.setDebugInfo("error", 0)8 Z+ G5 E2 L( _$ f% _
- } catch (e) {
; g' c! P2 b* g( ]5 A - ctx.setDebugInfo("error", e);" W6 Y) Q5 I" J y4 |/ y% N) H
- }) k/ @4 T ~, }( u a
- }
7 l; m \, Q# T4 | - print("Thread end:" + id);
. ^* O8 b, k2 W: x6 j | - }7 k( F% i( l4 M( q8 }8 b' Q( B
- let th = new Thread(run, "qiehuan");, Y, a2 Z% `* L! H! ^1 J y
- th.start();6 } V2 c& q: [7 j, B" s% \8 x
- }
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5 g) N' W; C4 ^% l- function render(ctx, state, entity) {) F2 k& f6 n. ]' |% Q' n
- state.f.tick();( w5 @: n3 }3 A
- }
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- function dispose(ctx, state, entity) {
) J* k! c" b2 b/ W8 |7 t - print("Dispose");
7 U; }- n: S9 r$ t& r# Y5 L( S - state.running = false;
. y8 x- E6 ?/ y - state.f.close();% B/ \3 K. b5 s5 l& |# J
- }
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- function setComp(g, value) {7 g8 x x E4 w4 ~& k
- g.setComposite(AlphaComposite.SrcOver.derive(value));
) C# w6 W& Q" m - }
复制代码 ' x$ t, v' D/ X4 p: a
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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