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1 _/ n0 [7 R# ~6 T( C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。
1 b0 P7 z, C3 P" S) m- importPackage (java.lang);9 A6 E# q* B( C9 t5 T
- importPackage (java.awt);8 \0 b7 u& h5 e3 [$ @! e; s' E7 E
- $ i1 J( ?' b/ i
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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% ~& w/ ]7 c! E6 l+ J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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) C" Z! B, }% H- function getW(str, font) {
1 [7 p# ~) ?* @1 d% k! N8 L - let frc = Resources.getFontRenderContext();" O' P: g H9 I/ e2 M
- bounds = font.getStringBounds(str, frc);
' ]/ ?5 Q ?0 p2 u - return Math.ceil(bounds.getWidth());! L/ u7 J: U' k6 a
- }
# ~) M: K0 B* H0 x/ g4 x
3 p3 N- L* e7 y' r: J$ q c- da = (g) => {//底图绘制3 c. h) t" t' [. s: u& C% U* {
- g.setColor(Color.BLACK);
3 w6 U4 c" l( } - g.fillRect(0, 0, 400, 400);
" n% ]$ \; n, n, h3 p$ o2 u4 D - }
7 g5 ~+ q9 Y [5 g; K
/ E, E/ F3 w" g9 z y' j0 V+ E- db = (g) => {//上层绘制# ?. K+ r% M" h! d
- g.setColor(Color.WHITE);
2 n9 g/ L: r W' }9 B - g.fillRect(0, 0, 400, 400);
4 A5 C1 y/ V6 Y+ j, i! C7 X I: k - g.setColor(Color.RED);
0 ]& N) {" g6 I7 N0 K - g.setFont(font0);
( h6 b! l9 O: k+ A - let str = "晴纱是男娘";& v% r( G/ H y
- let ww = 400;
; o* v9 q- F- { - let w = getW(str, font0);/ `- t, e+ Q4 u
- g.drawString(str, ww / 2 - w / 2, 200);) `7 G R* }* O- ` M( p9 g3 ?
- }
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4 Z0 j; v/ ?" A; w- const mat = new Matrices();! t) u. B5 D5 X9 ~
- mat.translate(0, 0.5, 0);
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- function create(ctx, state, entity) {
3 I* | Y% h4 l7 D. f - let info = {( ^: f1 O# D3 B6 `$ x5 ~- J8 C
- ctx: ctx,
' w, l( N$ p; f* i - isTrain: false,
7 U- V! q) F8 M J7 H- |3 I, a - matrices: [mat],: p8 X# H- @* V3 P
- texture: [400, 400]," D _0 B3 [# ~0 Q
- model: {
! b# r9 g# v8 S' w0 a - renderType: "light",# _- b6 z2 K$ |2 Z/ V2 T
- size: [1, 1],4 }6 J+ B. {3 c; \+ O' S1 C
- uvSize: [1, 1]4 _9 C& T. ?& H7 s( k1 x+ e5 e; ?
- }
# P0 A: A' c. \ - }. y, B! M2 j2 t( a" L$ p2 U
- let f = new Face(info);
$ k {" k* }* c) ]& L& y - state.f = f;
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: t9 F7 b2 h! ^1 U+ h- let t = f.texture;1 d& P+ d0 ^2 w O( o
- let g = t.graphics;
. W3 h$ C) |- @; b) v - state.running = true;
^. \' ]/ M/ U) n- [) r b6 ` - let fps = 24;
$ ]+ A/ L0 T# e" t3 U$ y. {1 x% A - da(g);//绘制底图7 ]' k' e; \1 z9 t: ?
- t.upload();
. Q& B8 ]$ v! a) j' K - let k = 0;
' @- y$ o( V$ q( G- l! `" X - let ti = Date.now();
- f+ K% r( ?! A9 k! C - let rt = 0;
$ {8 Y! ?, W: ~. ^# I - smooth = (k, v) => {// 平滑变化
. L; v8 F6 r& \( {0 _" z - if (v > k) return k;
) S2 d/ U8 I3 E3 W2 X: V - if (k < 0) return 0;7 q# y, G0 V! y- o, C
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;: ^. R4 A7 A* b. K, n: ~
- }
4 h5 g# H% d/ I4 O - run = () => {// 新线程2 `1 o+ L, b, x7 J3 C" g, F' k
- let id = Thread.currentThread().getId();3 t: j1 T2 Q% _) Y
- print("Thread start:" + id);0 O) ^' T. o# o, h I: H; G
- while (state.running) {
7 {0 O2 V$ y; ?; g3 l) Y. K - try {
, h. e2 a5 j# d1 c3 r. z9 q - k += (Date.now() - ti) / 1000 * 0.2;, h3 B% }3 C* v# ~3 F2 i
- ti = Date.now();
2 g) T2 y3 E, S0 B+ b - if (k > 1.5) {
+ ]0 _: g- z, z - k = 0;
$ r7 v1 P: |3 j$ ^/ \& m2 M - }
# ]; i. b7 m! e, u$ ]& \- { - setComp(g, 1);
: y* ]7 ?* Y+ m$ X3 s - da(g);
! O3 @; I ^. s' A# U+ P - let kk = smooth(1, k);//平滑切换透明度( s# d* Z; B; Y- L' d i3 s1 H& R
- setComp(g, kk);6 A8 I* S/ U2 X" y5 z$ D* W( Y
- db(g);7 p6 @2 B+ Z& n5 l: n$ b0 Z
- t.upload();
M0 [, k" L0 |6 _ - ctx.setDebugInfo("rt" ,Date.now() - ti);+ G! _8 ^+ d& H8 f" \! l
- ctx.setDebugInfo("k", k);
* V- _+ m! q0 |8 {8 L - ctx.setDebugInfo("sm", kk);6 _0 Y8 h3 u4 D" b! X' o/ T
- rt = Date.now() - ti;
; y7 b* _+ J6 k* R+ V7 h - Thread.sleep(ck(rt - 1000 / fps));, c, z# k) U5 N/ W3 P* u2 W
- ctx.setDebugInfo("error", 0)
; `# H( e3 t% Q. I& I - } catch (e) {
3 h8 V! v3 h' |. r2 z: t2 k$ N - ctx.setDebugInfo("error", e);
" }& t8 r) I( L: l$ \& @. f0 p - }! c4 Y( w: R5 Z5 U7 @' Y0 r% z
- }
: K. V! _" e7 i; ~0 U% l8 F - print("Thread end:" + id);. k! k' o) c" u
- }* N9 J/ P" P+ ^
- let th = new Thread(run, "qiehuan");: g1 ~ U/ Q, z
- th.start();
; L0 X3 {7 I7 T, p6 a! \- p5 ] - }
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: J; S8 j: n+ N5 h- function render(ctx, state, entity) {
/ b9 W8 X; G1 x9 I6 |/ \% o( O' K - state.f.tick();- W% G0 V5 P& z( N7 k) G1 m
- }+ W' e" g9 p6 }& a
B) C6 w. q! h0 p+ d2 E0 g" T- function dispose(ctx, state, entity) {
$ ~& b b! m" ` - print("Dispose");
) Z n* S5 Q2 [- g& ~( P/ F - state.running = false;
7 _0 V a' v8 T* z - state.f.close();3 [, L" G& N6 _8 ^8 d. p2 k/ A0 R$ r
- }; m! @$ ~1 m7 a
* _3 z" X3 {0 n. Q9 ^9 N' q9 r% ]- function setComp(g, value) {4 G& ?7 J% @0 s
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 i1 K6 Z# B7 `! m6 E4 v; s
- }
复制代码 3 k4 \; P( F8 J1 y$ k1 ?
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。3 v5 N% _& M6 Q# X
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' Y2 `6 t, s; `8 x* c4 N4 J# 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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