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/ Z i; T8 ]0 [4 f# R4 Y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。
3 `. F: B5 [7 @0 Q" [" \7 z- importPackage (java.lang);( o, G: u; S2 n/ e @- H7 n3 w( ?
- importPackage (java.awt);4 q* D, M" y5 t; l d% A
4 A1 i2 B9 u0 R5 o6 m# E- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);! i8 A" s$ i4 {/ N7 }
- 2 @& j; w+ q$ `
- function getW(str, font) { T& F! _; r4 N8 b& Y
- let frc = Resources.getFontRenderContext();
+ u& y! } K% O' K. |' G - bounds = font.getStringBounds(str, frc);
; x" `$ c/ r5 y, b - return Math.ceil(bounds.getWidth());8 M: w4 z" L. a$ D* d
- }# u! }# ^9 j- H3 D7 C9 _6 V
- : t0 V' o' } O2 `% B/ `
- da = (g) => {//底图绘制; y; s c. ]! G2 l, {. ~- p/ Y9 l
- g.setColor(Color.BLACK);) {' l3 u/ r; q8 h
- g.fillRect(0, 0, 400, 400);
5 x, D, p; E* z, K( O! ? - }8 @: ]/ Q5 K) d5 @( a6 W
# U( i N6 u: t4 e W' B- db = (g) => {//上层绘制
% v1 v7 y9 G' u& | - g.setColor(Color.WHITE);
* N- G' T1 O5 [) O - g.fillRect(0, 0, 400, 400);
3 m0 d$ ~. y' X0 D - g.setColor(Color.RED);$ N+ f: X6 ]$ M: {6 k( K
- g.setFont(font0);
1 h6 E1 E, M+ ]1 A - let str = "晴纱是男娘";
1 f$ X; o1 g( A+ z- M8 [) \5 D - let ww = 400;5 @, a0 B1 q( a# x1 d8 B) n
- let w = getW(str, font0);! U, s' o |) J* E2 n- e ?
- g.drawString(str, ww / 2 - w / 2, 200);
0 l, x8 T$ h- i - }# p- a5 C% {$ e3 \6 ]1 B1 w
4 p+ h( k/ n- @" `3 |" j& Y- Z- const mat = new Matrices();
8 B ]2 p9 J3 T2 [! F6 _$ ] - mat.translate(0, 0.5, 0);
) X4 }; y) L; x& p* k0 D
6 h C, L1 Y& L/ t7 F- function create(ctx, state, entity) {; f' x! q3 Z, n" t
- let info = {7 @' H# o8 M- U h4 ]6 d
- ctx: ctx,& l* x2 _" Z# e5 l$ N9 ?
- isTrain: false,
* W9 i2 O1 Y8 e4 H - matrices: [mat],# ~7 U% p& p: v) f; c4 j# V; k
- texture: [400, 400],
8 r5 d' h4 c) q5 S% H& K& X) X0 { - model: {
% W+ ~- D2 S0 K, W+ p& o: I - renderType: "light",
. [0 U& j: y% ~ k. ~, w! I4 X - size: [1, 1],
- D$ Q5 \0 L( x( u% b. M; L - uvSize: [1, 1]
r. e' P( n6 P( Y5 G) w - }0 `0 [6 l- G* U" L9 C" T
- }* S9 A( |: g0 j" l. T2 B! @0 ~
- let f = new Face(info);6 L: |2 A8 e5 n, [/ V
- state.f = f;+ I. s8 I; f0 P7 z5 i5 T3 ^
- 4 P+ i+ l% N R
- let t = f.texture;6 r3 l4 W- S" S* q7 c7 E& }4 i/ z
- let g = t.graphics;
! U0 F0 P$ w( v. l& a( J2 k - state.running = true;
) ?; y" e. h( ]% v; x - let fps = 24;# l* }) J2 S- @' d6 R
- da(g);//绘制底图
; z' r3 {8 @& ?$ @) [: |. H2 [ - t.upload();
& l- n' k) [) L! M, B0 ]6 p - let k = 0;8 s- r6 l$ U" N; t) x% r z/ }
- let ti = Date.now();
2 I( q3 ~2 _9 b1 K$ s; Z. |" G# X A - let rt = 0;2 k. H) w2 |+ R. f# T) ]
- smooth = (k, v) => {// 平滑变化
7 N0 L3 g$ X, t - if (v > k) return k;, S# }& G* V! B7 `* i( H& ~
- if (k < 0) return 0;
$ ?" i0 ^5 I& M7 z/ | - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;9 v: l* B7 T1 c9 t$ o
- }
8 V6 [& h" X/ b7 l6 Y' O - run = () => {// 新线程
. f, U9 ]0 q; `6 o - let id = Thread.currentThread().getId();! x" X6 \! s9 K2 z2 x( a; }' n$ k
- print("Thread start:" + id);
! }% u! I& ^6 Q9 I$ f4 f* {5 I3 n - while (state.running) {* A5 H& D" X E E* e) t
- try {% S' I$ o7 L& D
- k += (Date.now() - ti) / 1000 * 0.2;5 {5 M5 q# Z; h! ]' N
- ti = Date.now();
' T" u, Z# J% m9 b+ ` - if (k > 1.5) {3 n! B! l: o3 A
- k = 0;2 u) l7 ]& H4 z
- }
0 H3 N; b% S7 P8 M7 T - setComp(g, 1);
" O0 X/ T0 Z9 T% B2 h' F7 t0 w - da(g);
# ^2 h" t, [6 j& u/ F3 f* T9 X - let kk = smooth(1, k);//平滑切换透明度; @& h8 ^" w' P0 V5 j, p3 S
- setComp(g, kk);
- [. T1 h! R, Q! G - db(g);
8 r, {0 ?* @) o& b8 h$ u1 f - t.upload();% C' N# I0 }+ p$ a5 h9 y
- ctx.setDebugInfo("rt" ,Date.now() - ti);
) ]; ?. G3 i R" X1 f s( { - ctx.setDebugInfo("k", k);
3 e4 D' w* [& L, u% v - ctx.setDebugInfo("sm", kk);6 V8 ~( u+ b8 ~8 t/ C6 w( L$ Z& `7 M* `3 J
- rt = Date.now() - ti;% V' S- B, k, n9 B3 F
- Thread.sleep(ck(rt - 1000 / fps));
- I& q) X' u) s$ v) n7 q - ctx.setDebugInfo("error", 0)
8 @3 n" G' i3 N9 }) j0 ^2 {0 Y - } catch (e) {
6 \& P4 C8 }1 P" z - ctx.setDebugInfo("error", e);4 L9 p8 V: A7 ~" a% J/ x
- }$ w* H" |; P! k, |5 x$ \1 Q
- }
/ i' f% h1 P1 a9 e/ J' ^/ i - print("Thread end:" + id);
/ ], f" j! L, _0 Y+ u - }5 c' t* k2 j7 X! b
- let th = new Thread(run, "qiehuan");
8 b# _8 S4 ]4 j* s. I( I# ]4 d - th.start();
( B' c9 W3 p1 u( @' E# B) g9 S# ` - }
3 V6 ]1 J% ^0 M* s4 F; J: }$ r' u
4 x, h: g$ [) j* t- function render(ctx, state, entity) {
: q/ j9 C/ u, i3 Y! M& P% J - state.f.tick();: @* f( @7 B z
- }
% N G6 h- [8 A4 o - 9 w* Q3 U, T% c3 G
- function dispose(ctx, state, entity) {$ V# F! b0 |0 W v5 ?! v
- print("Dispose");& z+ b3 \' D1 r
- state.running = false;
' N( Q1 u& v; i, N - state.f.close();
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% m, G' q& \) q0 J- function setComp(g, value) {
8 m! [4 p' [4 p, \3 I& j; t - g.setComposite(AlphaComposite.SrcOver.derive(value));
6 I3 e2 D% l/ t$ b - }
复制代码
# W5 k% p C1 l X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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