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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。
5 T5 f! a- s- _' [- ?- importPackage (java.lang);! F4 u& e( {' A- Q/ M0 K
- importPackage (java.awt);
+ }. h4 z t- r1 o5 }0 x
4 f3 p- Z+ x1 k3 n' k! a- include(Resources.id("mtrsteamloco:library/code/face.js"));6 U4 Z+ `7 m3 M6 X- A0 p
- , b& s. @9 d4 I" n0 |
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 S1 q2 S+ }' l% Y/ {; {
* f$ j% l' w6 H6 z5 o3 i- function getW(str, font) {
- h5 l. Y" }3 q' F, D - let frc = Resources.getFontRenderContext();, B8 A% s# Y# C8 U" G1 m' ^
- bounds = font.getStringBounds(str, frc);
! u* M0 V* k- e - return Math.ceil(bounds.getWidth());( T1 |5 r: ?, }9 Y
- }2 `. |# v: e& u4 O0 g2 E
m; R6 v; `& w6 d" g( y- da = (g) => {//底图绘制4 @2 V3 z- k) r$ Z
- g.setColor(Color.BLACK);
) ]8 S6 h! r7 Y S+ G5 w2 K - g.fillRect(0, 0, 400, 400); y, ]: }2 i- Q" N2 F/ I
- }
0 U& s9 a, ?8 w/ o8 c4 `3 T
4 y8 j5 B4 Q, u: x, z- j+ k- db = (g) => {//上层绘制
) C' G& {4 _. d: @5 G - g.setColor(Color.WHITE);
9 s. h6 N% }( W o! n+ X8 c - g.fillRect(0, 0, 400, 400);
; {. y `$ d2 q4 [9 C, M* w h* E - g.setColor(Color.RED);
0 S6 o: N0 L! Q - g.setFont(font0);
" N- z2 \- G2 u& Q, K8 x. e - let str = "晴纱是男娘"; g' ?' @1 _1 i# ~$ }2 g: t9 d6 q
- let ww = 400;8 _5 k- P( ^! _ k2 C
- let w = getW(str, font0);
7 r6 c6 s o4 @0 f+ U - g.drawString(str, ww / 2 - w / 2, 200);+ I' @$ `# _& {% u, q, d, f) Y7 U
- }) `' F2 U& B1 {1 i% p4 ^
$ v3 K7 y; p: l$ a4 {- const mat = new Matrices();
3 ?$ `9 h/ `4 X0 G - mat.translate(0, 0.5, 0);
% ?* w6 ~8 a1 s4 k v5 i
e8 v8 e# w5 |" X7 V, \1 c, w& {- function create(ctx, state, entity) {" x; l1 y, w7 a( ^
- let info = {
1 q3 q+ L# j, j4 S - ctx: ctx,
( h4 o9 z0 d4 r+ {- h) S - isTrain: false,
( ?/ ?8 Q0 b- [2 o - matrices: [mat],
6 b7 U8 Q; R* l j - texture: [400, 400],4 j0 l' C+ T; t+ a* r
- model: {. Z/ D8 b y0 q+ w0 e, {
- renderType: "light",
0 q9 m b7 @# t2 w+ d - size: [1, 1],2 @2 a* [9 X% ?; k$ Q+ T6 c
- uvSize: [1, 1]! k$ p' P6 h+ m# w! ~$ H1 l' u3 ^
- }* J) p! d; T# c6 G1 t
- }
8 _& {7 B5 w/ K7 J! L- ^% B - let f = new Face(info);: ?. h# @" f7 c4 m+ g0 z
- state.f = f;
; `2 z: j5 C( m+ ~9 X
& C( L9 h$ U( j. J) |- let t = f.texture;
* ]; V1 {2 P% @+ ?' \ L6 B, z2 a - let g = t.graphics;) h# m. L) R$ u; O5 \/ a' d
- state.running = true;
& k$ l, @/ {3 U2 }! y) J - let fps = 24;
1 R. k- _; Y% N5 f- c7 Y - da(g);//绘制底图' u# o) x6 a& ? q, s
- t.upload();$ Q2 @6 }+ U2 w1 S5 _
- let k = 0;6 g* r3 p4 |- h: c
- let ti = Date.now();
9 H: N3 {$ B7 e+ w - let rt = 0;
2 M) o9 N2 x- a& c# b" r$ r - smooth = (k, v) => {// 平滑变化
4 M$ V: D. ?2 B ^% X1 k; J - if (v > k) return k;0 |! T) a* j$ m e- ]2 B, M
- if (k < 0) return 0;
{, {. P" ^$ m0 p) _! g - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
% V9 Y) w# b4 s" } - }4 C( f' o' S' j8 q( H8 f" }' H& W
- run = () => {// 新线程
7 y) |- G, c, X) J: A5 _: {/ t - let id = Thread.currentThread().getId();3 V5 R; h& Q! \) I8 p+ b
- print("Thread start:" + id);
0 R! Q' A% w; J+ w- I4 W3 T - while (state.running) {. e o% ]* k3 o4 T
- try {1 T( i' A6 n& O8 N/ g0 q& x* o* n
- k += (Date.now() - ti) / 1000 * 0.2;6 d+ e; V& I; r
- ti = Date.now();, ~& P9 e1 v$ N) u/ i* L" ]# F
- if (k > 1.5) {
2 i+ d5 a' v& F3 w, I$ e: [, O - k = 0;
3 ]3 d2 \+ D2 R; E) Z3 V; S2 g) Q3 A - }
# l7 J9 P- \5 o% Z - setComp(g, 1);9 U2 c! h4 p# o+ i3 \6 W
- da(g);( V8 F! U4 Z* u4 Y
- let kk = smooth(1, k);//平滑切换透明度! J) k5 M/ f" A* M" L& Z
- setComp(g, kk);6 d$ d1 `' L5 \$ y
- db(g);2 S. ?, g- V. J( P2 t+ x
- t.upload();* W2 K) o4 _) W# V2 I
- ctx.setDebugInfo("rt" ,Date.now() - ti);
+ O" B% v7 {1 N/ W6 q/ a* L# r - ctx.setDebugInfo("k", k);/ w3 M0 P0 {& J( F3 V
- ctx.setDebugInfo("sm", kk);) {+ ]+ i+ i! g7 u* p. h- F0 L
- rt = Date.now() - ti;
. g+ t- f+ i" u2 M; h5 h& D' { - Thread.sleep(ck(rt - 1000 / fps));2 V" U7 o# o6 g' T" T
- ctx.setDebugInfo("error", 0)
! @& }" D4 l6 ` - } catch (e) {1 h4 R! N- u# v3 k6 ~0 b
- ctx.setDebugInfo("error", e);# P8 h% g: C( C+ ?& A
- }
! w7 f j, U7 C2 f( B - }
% w, Q4 x1 V) R! S - print("Thread end:" + id);3 x% `; v+ [) M' X
- }+ o1 \. ~5 J N) q, `3 a$ g( z2 i
- let th = new Thread(run, "qiehuan");8 N# d+ o6 B/ P9 r" N2 F* L
- th.start();6 a& A4 ~& F' e5 c( A
- }
( R4 o" x0 P6 k2 ] - " [/ x! i: t! A
- function render(ctx, state, entity) {/ q5 A9 K) ]$ v8 t6 M" f
- state.f.tick();
: }$ q8 z9 b2 L - }! |7 o n* l5 q4 L: Z8 V
- . _" z; e3 C5 W$ h
- function dispose(ctx, state, entity) {0 a: ^2 A% _# j
- print("Dispose");
# Q, _% h) @ D - state.running = false;: n6 M$ ^0 D1 [% p+ t
- state.f.close();* S# Y% x* T; C2 w' k1 w& [( O
- }0 W' p6 i$ u4 O0 x- m! X& j
- % S c0 J) U& j: j- K$ e/ K [
- function setComp(g, value) {
8 i- n, F) X- k& u - g.setComposite(AlphaComposite.SrcOver.derive(value));
/ U( [5 ?# ]+ @1 V! g4 `" ^ - }
复制代码 i2 ], ^" r, u" x# P+ G
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。) B/ a6 m* K$ q5 J
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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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