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( w, I7 {% n# q9 L1 W1 \4 A: l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。4 W. F( D5 p4 x1 ]) y
- importPackage (java.lang);& X5 z$ E3 D- S
- importPackage (java.awt);
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( n& W2 W) C2 {+ \- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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( ?- ?( ~# S- j! M% K' G' [- D- function getW(str, font) {3 t& E+ b: K2 b, |
- let frc = Resources.getFontRenderContext();
7 ^) T- W* q, |+ } - bounds = font.getStringBounds(str, frc);
) p6 q. q% C* f: ^ - return Math.ceil(bounds.getWidth());
|+ Q5 Y$ a$ V j& W' f1 u - }
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- da = (g) => {//底图绘制3 V8 m# ]; X9 d0 d
- g.setColor(Color.BLACK);
- D7 {" s6 c$ O0 a - g.fillRect(0, 0, 400, 400);
; B, n5 e3 |6 T0 M1 P! B - }
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- db = (g) => {//上层绘制4 ~# ^0 P. O( c, h
- g.setColor(Color.WHITE);
/ f( D0 w% a, X4 f8 y$ X$ S - g.fillRect(0, 0, 400, 400);4 u3 N+ I5 q4 x6 J7 e
- g.setColor(Color.RED);5 c7 V% ^; |/ u" O
- g.setFont(font0);
# \0 i4 J5 f9 a; o) d- y* F- l - let str = "晴纱是男娘"; U/ m& \2 l! q# F
- let ww = 400;
# X# o3 s3 v4 x5 w) h- t - let w = getW(str, font0); d: L8 L0 a8 V7 |) w/ S1 o
- g.drawString(str, ww / 2 - w / 2, 200);
8 r* l- M- B) I- ` - }
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- const mat = new Matrices();
2 A% ^* c) g/ g5 y0 k8 J. O - mat.translate(0, 0.5, 0);
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% j! E/ U* h [& \. O6 }; g$ E5 j- function create(ctx, state, entity) {+ h& Y) u# y8 I4 U% d$ \) ^
- let info = {
- k3 l& \$ ~# u5 l9 p - ctx: ctx,$ C, i3 f+ ?, y4 v. H$ {4 M4 Z8 b7 w
- isTrain: false,
- y. x% S( J1 V, n, Y4 X - matrices: [mat],7 d1 D' Y: l& B
- texture: [400, 400],
- c3 p9 K# s9 @3 S# n - model: {
' @3 ]$ X, R; D3 \ h% Q - renderType: "light",) O! b$ f U) C# U0 W7 K3 Q6 U
- size: [1, 1]," }2 L& K# \) B2 t* w
- uvSize: [1, 1]3 w! O- A) y2 x; x9 P9 f
- }, I- m% W1 L3 q" c! ~9 s, O" \
- } U5 y; y4 Q. ?, j1 Y
- let f = new Face(info);3 e+ e) ]4 o) ^2 l
- state.f = f;3 `5 M7 @9 q% r
- p8 V) { {- p+ O
- let t = f.texture;- X9 E2 K% \, p: D U" Y
- let g = t.graphics;1 b4 l& x# X' @8 k M5 K9 p
- state.running = true;
: g* a d8 m) a) s% M: M) h5 K - let fps = 24;
# L& h0 ?9 `+ _& ]4 d0 j - da(g);//绘制底图
; B, z2 v8 l' I$ a/ f$ a& V2 d - t.upload();
" P- {2 j4 U$ G) ? - let k = 0;
# |$ g# \" M' F. M+ x" s; L* e3 U - let ti = Date.now();
7 `4 o+ r* e# j$ q - let rt = 0;$ c6 h2 i0 M* Y
- smooth = (k, v) => {// 平滑变化# d4 t' b1 h) F
- if (v > k) return k;
7 r5 T4 U, V: |! r8 W: q! } O - if (k < 0) return 0;, [! [8 |# H* C# Q
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;, Q V) { j' o& J* q" y
- }
* S F# C) D& K4 Z" ` - run = () => {// 新线程8 e/ v- C8 f/ q8 \; e
- let id = Thread.currentThread().getId();
' O9 m, j$ x; s% ?0 i. m5 w - print("Thread start:" + id);
9 U; x! p, \" u - while (state.running) {
* z# e/ D8 j: { - try {! O! d, W) H/ f7 _
- k += (Date.now() - ti) / 1000 * 0.2;
0 h3 {9 @+ @5 ]4 ~7 X; ~ - ti = Date.now();
+ i; d7 `! S6 P - if (k > 1.5) {5 ~; e! m8 I& I T1 Y/ F8 k
- k = 0;
7 w7 k& X' v5 F6 O6 B/ r! q9 G' e - }
- ?$ l- G- u$ a W2 f! G; J& Q - setComp(g, 1);
0 n, _; _) Z$ u" f5 J* f - da(g);3 M3 K' A/ i2 W9 O l e% ?
- let kk = smooth(1, k);//平滑切换透明度8 Q" Q! f. f$ L; x+ q) y
- setComp(g, kk);
: h; ^/ i8 R2 u6 y* L( \% w0 K - db(g);5 `. X" O$ M. f% P+ A) u
- t.upload();
. Y0 x/ z( J! l K/ M' Q - ctx.setDebugInfo("rt" ,Date.now() - ti);, ^& d* n* ~ v8 k1 l
- ctx.setDebugInfo("k", k);
H' L3 w# Q8 e1 V - ctx.setDebugInfo("sm", kk);5 W0 `8 B% m! G1 U0 |
- rt = Date.now() - ti;
u2 B7 Q( m; N4 [" { - Thread.sleep(ck(rt - 1000 / fps));
9 X) a5 S% q, y) I a' } - ctx.setDebugInfo("error", 0)
. [( J( t* Q( ] a' q - } catch (e) {' p# ^9 T: q6 x, P, a6 d
- ctx.setDebugInfo("error", e);
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- print("Thread end:" + id);$ R( F5 T. h. L' W
- } H6 u6 u9 S0 v/ z A2 r
- let th = new Thread(run, "qiehuan");0 c9 E5 ?& ?0 E a( c4 H
- th.start();$ M, @4 w" m+ @' z. q h; o
- }5 R3 h6 G% J/ m* j8 n7 B4 v9 ~
0 V2 Z0 w3 B- @1 F- function render(ctx, state, entity) {
7 L/ W& A% G* D( F2 x/ B) @ - state.f.tick();
! \4 I3 L' O ?( L5 { - }& `* j2 {, @" L+ x1 X
- / y5 E+ Y! v7 O' D
- function dispose(ctx, state, entity) {
+ X d6 k* J d6 w& U: h - print("Dispose");
5 }0 r7 v4 ]; d3 r3 O% o - state.running = false;
) B) {# r1 |9 V - state.f.close();; v1 ]0 w' Y) l( D- N' `
- }+ S, s4 t% g( L6 w; ^& W% \; t
- C- C0 }0 I" S* L8 a
- function setComp(g, value) {
! H1 M$ W: g, m7 b3 D- w - g.setComposite(AlphaComposite.SrcOver.derive(value));
- P7 B; a0 v+ p - }
复制代码 6 P% H' w2 g4 d& Q7 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。# G% w9 h x) a
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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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