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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。( F! x2 T$ b' @; f
- importPackage (java.lang);
" E5 h" R3 g' | - importPackage (java.awt);' w9 e! M4 d. k& z
r! [! H" b) q2 x- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); c4 y2 [) ^5 I! W
0 F+ W8 u9 a3 Z. X* {6 Y. ~- function getW(str, font) {' r* {5 S) x+ {7 I4 j) ~6 d
- let frc = Resources.getFontRenderContext();/ L) ?. p4 {" ?% H- ~" [% G' M
- bounds = font.getStringBounds(str, frc);
5 h1 s- @2 s8 c8 D - return Math.ceil(bounds.getWidth());
$ ^7 I& [2 N2 ?9 M& u - }
/ K2 x5 U$ @3 S, \* l& s
) ~+ m, a2 D1 Y+ m3 }1 O$ Z/ ~- da = (g) => {//底图绘制
" T6 N) X2 R' v2 ~/ J - g.setColor(Color.BLACK);* |+ w1 v4 ^( B8 ]" d; f4 L
- g.fillRect(0, 0, 400, 400);
! _, S9 b% H3 B2 D; p; J7 v0 _ - } }1 O. g1 n! o/ n0 ^
7 Q" G, G" P0 m: V- db = (g) => {//上层绘制
9 k0 T* F. I% z2 O7 y& t' r9 { - g.setColor(Color.WHITE);* V% W9 p# f s9 t2 h$ _" h# s
- g.fillRect(0, 0, 400, 400);$ s# ]& l" c5 p) b0 B& q
- g.setColor(Color.RED);, x5 u" m7 n* ]
- g.setFont(font0);
2 M, g8 i4 y2 V; w4 b6 E( v - let str = "晴纱是男娘";
5 u& e, \+ H$ ~) o- ~1 j" Z! r5 ^ M6 S - let ww = 400;
4 c2 M' f, z @0 G) m, o+ Y6 R - let w = getW(str, font0);
4 B9 |! [& I. }$ n- }: P4 P - g.drawString(str, ww / 2 - w / 2, 200);4 b$ U1 H0 c( M9 j) G# u
- }
9 N) }- N. A6 s3 f3 f- a - 4 I4 F! F' Y4 f) ~) I/ F, K- k
- const mat = new Matrices();
* V1 o! b# i6 B/ ^; h - mat.translate(0, 0.5, 0);! C+ W% C9 s8 u' w
- & @, M3 z5 ~2 v* D- Y0 f }. Q& L
- function create(ctx, state, entity) {
! Q) _% w) R) }- p" f - let info = {
3 y N, G4 G9 i; t7 r& T - ctx: ctx,
, N& M- T% R9 u# g0 _; N - isTrain: false,& A6 a. A( H" d" C4 `% _1 D# C
- matrices: [mat],
$ H) ^) G" h. ~$ Z r - texture: [400, 400],7 \8 C! d0 m6 M
- model: {
6 I0 O: ~" }9 w H3 Q - renderType: "light",
$ g' e z, v6 a5 j/ q* w8 D# ^ - size: [1, 1],
8 K7 j" z1 x" ^8 H+ K6 O1 x- Z - uvSize: [1, 1]$ w! U7 ^ r* w
- }
2 w; @: k* A- | - }$ m1 A ^& D# }) E
- let f = new Face(info);
8 C C# ~. z0 v+ y4 x( Y: x - state.f = f;
1 f& [, n+ N, A8 b! F - 1 ~1 [# V" q0 ~$ H9 ~8 ~6 v2 O6 {
- let t = f.texture;
/ r& S4 w" \& K& T1 W+ n5 v* W - let g = t.graphics;
m3 E; t- J9 z - state.running = true;
6 u5 _4 _; H+ p- b - let fps = 24;
5 ^5 G$ Z( Z# M/ @( R7 ] - da(g);//绘制底图+ E! c8 Q0 C' h! H* t# l c9 m
- t.upload();2 y( F/ d* J* O; Q7 ^4 t; V
- let k = 0;9 @- m7 _, n! P6 g
- let ti = Date.now();) e& d$ w2 T, A' r1 y6 {. I" j# m
- let rt = 0;+ Z$ |& V5 S C( Z8 ~1 X
- smooth = (k, v) => {// 平滑变化2 p0 l; D% ]0 G3 f
- if (v > k) return k;
2 E3 X* J9 U! B( ~' B9 h% B6 O s - if (k < 0) return 0;6 y) q9 G9 A6 _ L
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 s/ q3 c5 Y( I - }
6 [! x+ f% D/ ? - run = () => {// 新线程0 T! r) \& M9 J6 ^+ s
- let id = Thread.currentThread().getId();* P+ [3 N/ Z& P. U4 p) f6 r
- print("Thread start:" + id);
2 u9 V! S! a1 |* p - while (state.running) {1 X2 A8 R9 v1 S* {$ [9 V! I
- try {9 M9 X1 { l, F' e
- k += (Date.now() - ti) / 1000 * 0.2;% c' `1 ~7 x- [( {% X
- ti = Date.now();
( w! Z' Y# q( F8 _0 b+ } - if (k > 1.5) {
1 I& C6 j* G+ V8 c/ V$ ]+ ~9 j6 r2 s - k = 0;2 J3 s9 C+ m& H2 s. }% l
- }
, z) D. \2 s/ _3 V - setComp(g, 1);
3 ]5 @; x5 B9 V' a! L% C3 m8 }$ g - da(g);# H+ H" I5 _: `. d1 p1 o* S6 O
- let kk = smooth(1, k);//平滑切换透明度+ K' i; U2 v( [0 h; ]
- setComp(g, kk);3 G1 r6 H+ K0 z( J& G
- db(g);
0 K7 Z7 C8 a" ~. \' A - t.upload();
; F( F! f* @# g$ S9 l/ K6 m - ctx.setDebugInfo("rt" ,Date.now() - ti);
2 x( H, v$ a: H0 t* j: A/ [5 n+ J - ctx.setDebugInfo("k", k);/ c, A; I( O, G \6 l, {: C
- ctx.setDebugInfo("sm", kk);
+ [( `0 U6 n4 p% E' G( b - rt = Date.now() - ti;
$ |3 y! @/ l: o# Y: Q - Thread.sleep(ck(rt - 1000 / fps));/ c% q6 t2 d( U/ ^
- ctx.setDebugInfo("error", 0)
& B" ?/ A8 j" x( h/ K9 }$ r - } catch (e) {! t/ q, W4 j9 Y
- ctx.setDebugInfo("error", e);
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- }
7 f& X: C' q9 n+ u$ ]0 \9 T/ \ - print("Thread end:" + id);
: }7 r8 Y7 F2 F/ B' P/ B X% [) P - }2 s2 [3 H# b/ \# s: B+ ]
- let th = new Thread(run, "qiehuan");
# g5 ]: M7 n, G - th.start();5 T+ ~% l7 _# ?5 R% R
- }- `' o. Y# C- ]: ~- Z
- 3 d4 L, R5 ~8 E* c) A$ |( G. ?
- function render(ctx, state, entity) {
/ } F! b7 f) _7 F5 m1 c - state.f.tick();
& V6 G. S; ?+ Y - }) ]) k0 M3 ]* a* w9 u
# Q/ q" y# |3 T- [# y n- function dispose(ctx, state, entity) {
- y# X6 G! W" _& m$ { - print("Dispose"); m' I% L2 U7 K9 d) i0 }) R
- state.running = false;
3 p/ |2 H1 b# O4 ~ - state.f.close();
7 _# q* u5 j1 ~2 _ b - }
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+ h7 N. k) h9 G3 G- function setComp(g, value) { {5 C1 A3 t1 O( F# O# O) } l( q, k
- g.setComposite(AlphaComposite.SrcOver.derive(value));* t& L2 Q- m) o" b# |
- }
复制代码
- K! }3 r: k! [/ r* u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。( I( ?5 v& T! {
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! _+ `! n- x: x3 I6 d顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)$ ~) f/ f' ^' I8 G" G; }8 G( M
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