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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。
) Q. m9 r E7 u n: O) U/ S5 R! f3 X- importPackage (java.lang);
3 y1 u. V* A) s0 a - importPackage (java.awt);
9 b/ K8 X" Q% V7 ^ - * C) J2 K1 ^; \3 Z, m% \
- include(Resources.id("mtrsteamloco:library/code/face.js"));9 D6 P+ ^ Y! t3 H4 t& ^
- 4 {" x$ b1 J" g1 ]5 ~
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);9 S' e0 E# ? Z" {3 l' R9 C
- ! d* x. w9 n4 k# E, f2 |5 r
- function getW(str, font) {5 L8 E) L n& v& ~& O
- let frc = Resources.getFontRenderContext(); w7 ?) V6 s3 i. T$ q: F7 h/ e
- bounds = font.getStringBounds(str, frc);
2 ~1 y4 H! |# v5 h9 j" ^ - return Math.ceil(bounds.getWidth());
" f" L! f, L6 T# q! C+ m# r% ?1 c- x - }
% f8 s5 ?5 q% _( @5 q& I8 C. U5 J - + T6 M8 b6 e+ `% ^% b
- da = (g) => {//底图绘制
* ]! U) I5 F: g2 U - g.setColor(Color.BLACK);, V1 H% Z% ^! |: W
- g.fillRect(0, 0, 400, 400);- f. f5 O6 w6 R% A8 r7 b# R( d$ B
- }
% M l( \8 Y. Q: s
# [3 `$ k4 d+ W1 U- db = (g) => {//上层绘制
8 O8 g3 L7 R' V$ x - g.setColor(Color.WHITE);1 T7 `3 _; ]. ^! |9 P2 d
- g.fillRect(0, 0, 400, 400);9 w2 L0 E! F% C. P1 J4 H
- g.setColor(Color.RED);
) v; a! E3 w& V) n - g.setFont(font0);
d. j6 J3 s" z: h - let str = "晴纱是男娘";
$ j( ^5 u* I4 D* l - let ww = 400;
- i/ |3 `2 J( F6 q7 ?6 v, m- c+ y$ m - let w = getW(str, font0);- J; [; p9 L! p7 q0 D
- g.drawString(str, ww / 2 - w / 2, 200);6 W4 i* x8 j+ t
- }% N. y! Y3 s- Y) s
; Q F+ J# Y$ T! I# r0 Z- const mat = new Matrices();
; O/ O: _+ ^& E. }1 |" q - mat.translate(0, 0.5, 0);4 s, f) R, g H' R
- # L9 X+ K* k( g/ E
- function create(ctx, state, entity) {7 D) ` D8 G3 ]
- let info = {" x0 x1 u H" \/ O; z
- ctx: ctx,0 c# f! o2 a* N6 H( O% ]
- isTrain: false,0 @( n+ e5 ]4 a6 W( j; J5 h6 {* z" \
- matrices: [mat],6 }, V4 E3 [+ s4 l7 f% a
- texture: [400, 400],9 N0 U `9 D, {+ G( f4 v' @' H. e
- model: {
% c% y$ ]$ m u: p - renderType: "light",
+ K; o9 C' k7 i- Y5 U, t - size: [1, 1],
* C. y, Z2 O4 n# j ]4 s% o - uvSize: [1, 1]
?1 I- W! g5 j. B7 R% U; _ - }" b7 a0 b) u& F
- }
9 D, W6 D% W# _, S; R5 T4 ] - let f = new Face(info);9 `1 O3 w4 w' K7 X6 A: q
- state.f = f;+ f- c3 Y b4 v2 _8 q
- & O8 \- ~, g h7 `* q) {
- let t = f.texture;0 n6 M0 f+ O" {, W: b+ |
- let g = t.graphics;8 V7 e6 D' J$ X: D% \( B# W' q
- state.running = true;" E; O7 E* J1 M N2 I) a
- let fps = 24;
4 A' H+ u- x2 { - da(g);//绘制底图7 J* L/ B+ M& g& z4 |; |
- t.upload();+ }$ Z/ G3 D3 c1 b
- let k = 0;
+ d$ B7 r, I' N6 Q" t+ S" T" w - let ti = Date.now();* [' B2 v% k, I" }; A
- let rt = 0;6 ?" ^$ P5 O/ y V" y. \! y
- smooth = (k, v) => {// 平滑变化
* \& W3 v2 }/ b/ y1 C - if (v > k) return k;- [( B/ l2 C- n% H& e, t# m
- if (k < 0) return 0;% ^- h4 I. d' w- j6 ~: {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
8 o0 j1 p4 p% X' ^2 { - }
/ a" u4 J' N2 C' f8 l& B. L - run = () => {// 新线程( f: {) U; P# F4 o
- let id = Thread.currentThread().getId();) L* d8 D/ b, L ] G" h
- print("Thread start:" + id);
5 q* k; k1 ?) @. i. d - while (state.running) {" l; H' V6 i/ b
- try {
! z- m4 Y# R3 g% H$ b6 H - k += (Date.now() - ti) / 1000 * 0.2;. }* V9 o; e4 A0 @
- ti = Date.now();6 w& u, W, z$ {6 Z
- if (k > 1.5) {
5 B- ^2 \: d/ \5 Y7 J+ Y. W - k = 0;, E" F3 @0 _+ |) k; C
- }
1 l0 u. D! r9 n. f" H' n - setComp(g, 1);! T* C0 o, P9 a6 G. ]
- da(g);* c! I- n9 ^$ V4 ~ X' \; U+ s% ?
- let kk = smooth(1, k);//平滑切换透明度* O3 F" c6 ^9 u8 }9 Y
- setComp(g, kk);
# q0 m; n! k# n, G2 Y1 ? - db(g);
) J; B* ?9 A$ a- K' l n$ w1 S$ A - t.upload();
0 s3 I6 Q& y. V4 u c# n; a - ctx.setDebugInfo("rt" ,Date.now() - ti);+ F! @" l9 q0 z' \
- ctx.setDebugInfo("k", k);; M" c/ a. |& Z+ v% q$ S
- ctx.setDebugInfo("sm", kk);
, B+ _6 A4 |. `& P/ I) c' C8 ? - rt = Date.now() - ti;
! Y. o" t% W% p$ u% L - Thread.sleep(ck(rt - 1000 / fps));4 d. m- w/ `# g2 K
- ctx.setDebugInfo("error", 0)" {% w9 X5 D, x8 v4 a5 `
- } catch (e) {
9 C; Q' [( g" W8 i, L7 t* [& f - ctx.setDebugInfo("error", e);
( q6 w- g$ f. m- D% t0 q+ v) Z - }
m; Q) ]3 C* b) V# r [& T! k - }
3 e% n) i5 L8 J+ K) R - print("Thread end:" + id);* U7 I4 z$ A' U/ N5 u0 t8 K
- }- @6 o) f, D, E- P
- let th = new Thread(run, "qiehuan");
% E% U( q' o8 ]& I6 b - th.start();( T* o6 |& P4 H6 [- {9 W
- }% }; ]; L5 `1 _% _0 N
- : U9 u0 n* d L- V+ M
- function render(ctx, state, entity) {
0 n4 C1 h9 R" |& g - state.f.tick(); K6 V) ~5 N, A/ }) Z( N# e) Z
- }$ v+ h6 A9 y! a! Z+ Q v
; g! S- m' X3 t2 ~- `- function dispose(ctx, state, entity) {
! A- c# }# @( O z! }+ l" t2 }& h# I0 l - print("Dispose");2 V2 }# k' T2 _- E$ A: `
- state.running = false;
5 L! D: u4 d! d( d; u7 p - state.f.close();
( R5 w( R+ z5 E# j" u/ c5 [ - }- k8 z" ]) X/ a& Y/ g* k6 L4 A
j# f+ H* D: q' P( ], B- function setComp(g, value) {
" @0 }, C5 x u( w6 |! ] - g.setComposite(AlphaComposite.SrcOver.derive(value));; ]# X! d- X& J# Z4 [$ ~
- }
复制代码
* z" ]( a2 j0 Z; T: }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。 @: l0 E4 V% |4 H. I- w
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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)) n4 Z5 _2 D1 c7 f1 b; v
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