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' E, `! g! j# o. L/ v) |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 n; f7 `( v; C8 \- H
- importPackage (java.lang);' x" m: \. S% Z; N, n& p
- importPackage (java.awt);
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- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: y: x% P+ P) Z6 q
z7 C2 s; t& d- H0 f- function getW(str, font) {
" {7 C6 }5 P' e6 u. b" z - let frc = Resources.getFontRenderContext();( q4 l) c0 K' Y8 I
- bounds = font.getStringBounds(str, frc);
+ J/ D+ P$ X% G. L - return Math.ceil(bounds.getWidth());
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: x" O S4 H+ b- P! L$ K: B- da = (g) => {//底图绘制
# ?/ s' w. `+ X: t& m9 v' Z6 b) \- B - g.setColor(Color.BLACK); Z) n/ Y( C4 O( J9 P
- g.fillRect(0, 0, 400, 400);: z$ o. P4 ^3 A! c( f
- }4 R9 j0 H0 F1 [: m3 F
/ j1 N9 ]7 u8 G- c; A- db = (g) => {//上层绘制
m$ K& I+ |5 w& w& k - g.setColor(Color.WHITE);
6 Y# i7 w7 R* F0 w6 j! K; A- T# L - g.fillRect(0, 0, 400, 400);
: Q. C8 D. S6 w# |4 c4 ]# t' q - g.setColor(Color.RED);# Z& ~: i* Q" O
- g.setFont(font0);
! q) J" Z$ }: A( @5 P - let str = "晴纱是男娘";
# l+ q' y9 h* z `% X - let ww = 400; w/ z* t- c# a* M
- let w = getW(str, font0);
0 e! V/ e4 b" I+ X- n4 V" \; w' V - g.drawString(str, ww / 2 - w / 2, 200);! |" G1 I) G5 w1 q* w
- }
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; H6 p# K8 f/ I: k1 n- const mat = new Matrices();% w* _% I+ R0 A/ i' z7 p8 P6 e
- mat.translate(0, 0.5, 0);5 ]" s- N0 C* F& I8 \
4 F( L5 ~9 _3 W: n- function create(ctx, state, entity) {9 w; {* S5 G0 ^5 l* t7 s
- let info = {- c' r E2 U3 x7 s. Y& c
- ctx: ctx,7 `9 I6 k) Q- e$ Z
- isTrain: false,
% S& o* V+ M9 x# k8 c3 p6 P - matrices: [mat],
" c8 s# |: k0 g - texture: [400, 400],
t' [( P. e* j: m4 T' P - model: {
* e5 F1 L" i0 r U6 S - renderType: "light",* a/ g7 g& v) s& A C$ f2 Q$ k
- size: [1, 1],
& h" q5 t# I" o H. d) p w7 j$ B - uvSize: [1, 1]% l; `3 Q) p$ [$ u Y' c6 }0 j
- } W1 ^5 m' O0 x
- }
( n3 ?. a8 R9 c - let f = new Face(info);2 |6 |& B( X9 K% m- L# O4 c' w; a
- state.f = f;% E, w0 C, \3 N0 N, w7 y4 A5 }
- + `9 E8 n" b& X
- let t = f.texture;
0 ~. o, G& ~- \ - let g = t.graphics;
" P. U. Q* d: {1 D) r - state.running = true;8 ~) g& ~/ |% N
- let fps = 24;
( }! e3 }/ O: @* y; G - da(g);//绘制底图: K& h* m V- P6 |6 @# K9 f
- t.upload(); G* f; e7 z5 |% [$ g3 ]& ]8 X
- let k = 0;% E2 G; k l. W7 L7 L6 c: j4 |
- let ti = Date.now();
2 Z5 D4 b" D7 T) f - let rt = 0;
3 Y5 I6 ~: n" N6 G& ~7 k - smooth = (k, v) => {// 平滑变化
/ m! b4 K9 Y" }9 A% k6 }2 ~ - if (v > k) return k;
. f& v, B- N! X3 u* C# r9 }, Q: \ - if (k < 0) return 0; r3 ^6 H4 L9 p8 c
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
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- run = () => {// 新线程
* d. M) ^0 `. n0 h/ y9 v% u - let id = Thread.currentThread().getId();6 r7 @) }, f- X, y% H1 m& N* Y
- print("Thread start:" + id);( |" H7 b7 |4 r" }1 h4 t7 Z$ K: E- } s6 d
- while (state.running) {4 }6 A: I/ y5 B* h3 e' ~1 \! F
- try {
& Z" Y$ Z5 V) J! A5 J- L - k += (Date.now() - ti) / 1000 * 0.2;/ H& k/ t( K8 I8 |1 f& J5 c# W
- ti = Date.now();
- {1 p9 F& X1 q: i& f - if (k > 1.5) {
. n" d2 Z' E: s5 P% Y* B - k = 0;1 @1 j: l8 t' c: n
- }
5 h3 _* e8 p7 Y4 {; t - setComp(g, 1);
. K) w* b6 ]2 n) A - da(g);
1 U+ o4 x/ c5 y* K2 i+ F - let kk = smooth(1, k);//平滑切换透明度
4 G8 H3 }, X2 a' f2 f1 ?& V - setComp(g, kk);
( n+ T+ x+ r* @- ^- E - db(g);) O4 R8 I- f+ d0 x5 |
- t.upload();2 N! w( _; U6 ^) M: F, y' l6 i
- ctx.setDebugInfo("rt" ,Date.now() - ti);
! Z7 p1 Q5 h- ~7 A0 w U - ctx.setDebugInfo("k", k);3 G* O1 p) Y/ K I
- ctx.setDebugInfo("sm", kk);( V c1 y, k/ z, f
- rt = Date.now() - ti;+ R' T* I0 T! D3 e" Q
- Thread.sleep(ck(rt - 1000 / fps));
2 N8 c3 l) u( ?; r - ctx.setDebugInfo("error", 0)6 Q2 T! X) _& C" }8 i
- } catch (e) {
. }2 N0 @( |* ]7 H - ctx.setDebugInfo("error", e);
' q' v% E( O" P - }
( ^2 q0 Q% \3 K) p2 x$ { - }
1 ~- \6 L x% T+ H; m* L5 v - print("Thread end:" + id);8 E( _! @/ q' v5 d& K2 m! \
- }) ] a* F4 u/ E3 \$ d T+ Q/ c
- let th = new Thread(run, "qiehuan");
2 C, X2 @5 ^0 x, A! Q - th.start();! `8 A! B; Q. y( y0 i: v5 @
- }) A# r" d$ n9 W7 p
$ U/ W+ ~7 V! f4 O2 G( p, E- function render(ctx, state, entity) {
" M* Y! X$ a2 C7 M, F; Z - state.f.tick();
: ?( Y8 ~ ?- Y# t - }
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* |! t* z$ W5 ^/ f9 ? N5 F1 K5 g- function dispose(ctx, state, entity) {8 @& t8 k& l3 n
- print("Dispose");
# y/ d2 B9 i) `7 z/ @# X: k# l9 V7 S - state.running = false;; ^7 r& t' o" U0 O3 ]
- state.f.close();
+ I6 l. |; X. H- F6 b+ M* C' U; p - }9 U3 D. }! u& y
, f, F i! J7 l# B! B- function setComp(g, value) {
( a! ]% z! T* S5 [; |+ V - g.setComposite(AlphaComposite.SrcOver.derive(value));
- M7 y. x. G' J* }& h - }
复制代码 1 q* d+ j" R$ D) D- d# }, i
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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