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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。
7 {3 ^( ^1 H) I* F7 K* h0 ?- importPackage (java.lang);
/ t. E, h$ q* J8 L% t8 @$ n - importPackage (java.awt);
+ [, F. b' W& ]0 P0 d( C0 w - , |# M: T) W% [4 x6 J2 J+ r
- include(Resources.id("mtrsteamloco:library/code/face.js"));0 z* L* e2 J) a! i6 q
" O- n/ c, ~& d. u3 A3 ^/ e- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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- function getW(str, font) {. x; Q& X+ A: g' w, i( p' p
- let frc = Resources.getFontRenderContext();
# z I2 p! d: j& K0 w3 | - bounds = font.getStringBounds(str, frc);1 O+ P! S9 Z2 J
- return Math.ceil(bounds.getWidth());9 {2 J4 \; f: a9 _$ F
- }
+ W# a0 m$ X" g1 u
& I. y5 p* k* n7 P" ^# ~- da = (g) => {//底图绘制7 V0 c3 K# T9 t
- g.setColor(Color.BLACK);
( I% V( y9 d& l: p - g.fillRect(0, 0, 400, 400);: M( k, c6 @% k/ v& ^2 j& D! i& g
- }
8 N) r# @. S5 Y$ @5 k# y8 x( n
) \( _5 h, p+ d% \: ]% n- db = (g) => {//上层绘制8 `& z" D% G: D6 }& A2 \% b' {
- g.setColor(Color.WHITE);5 Y6 j0 m4 V, O v9 u9 @
- g.fillRect(0, 0, 400, 400);1 @7 R+ a$ k3 c/ n7 A+ ?! W1 O6 Z
- g.setColor(Color.RED);1 A9 ^, P9 @0 M) l8 E/ t3 R! P
- g.setFont(font0);" q5 t& P, [1 t4 E! t, I
- let str = "晴纱是男娘"; j- ~ K9 a4 ~
- let ww = 400;
0 P/ T: Z; V$ A/ w/ z8 l - let w = getW(str, font0);
+ H% C* {" T; i' | - g.drawString(str, ww / 2 - w / 2, 200);
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^4 f0 v# d0 \- const mat = new Matrices();
/ V* W) B, h$ }2 R - mat.translate(0, 0.5, 0);! \8 f8 Z, B# K- S
- & N/ G% M" L, a! ^
- function create(ctx, state, entity) {' h0 ^ N0 q$ ~6 v6 `. Z5 e
- let info = {# n) a0 e$ l1 P- o& l! c' Z
- ctx: ctx,
) i% w( ]* n: ^" b& T) q - isTrain: false,+ f) J ^$ \7 ^1 C+ R8 a; x
- matrices: [mat],
9 z0 h7 L9 n J B2 ~ m - texture: [400, 400],. a; \$ l5 _) {: ?6 u) C% M! J8 K
- model: {- y* l3 e% Z7 F3 p
- renderType: "light",
2 Z( s. `' C7 u9 e, G3 Z' I - size: [1, 1],: G2 b$ D! a- @/ T1 w8 A6 y2 g# N" y
- uvSize: [1, 1]9 G2 \& |, B X2 F
- }5 C L$ ~5 C' ]$ }* Z
- }
) M8 s+ J: l( L' v/ s0 ` - let f = new Face(info);3 c+ x7 v/ s! p+ |1 y
- state.f = f; X) V# E0 e" P& w2 K
2 F" x7 e5 C' n- let t = f.texture;
6 {1 q: V7 ^' ^' k! }5 i - let g = t.graphics;, I9 L, N6 e0 t, B' x0 R
- state.running = true;
9 q, X5 O# s# E. m0 _" H - let fps = 24;; X8 X: ~8 a; P- s
- da(g);//绘制底图5 Y( N+ [2 G1 [
- t.upload();
$ s& X& F4 {* X - let k = 0;
6 Y- z$ P# N6 D- Z - let ti = Date.now();' V2 D% o3 \! |9 L+ \ W) N
- let rt = 0;9 t; J3 U! J- X
- smooth = (k, v) => {// 平滑变化
: l9 e7 t- E) L5 q1 g/ s - if (v > k) return k;
0 [: z7 {, H: {8 m. @ - if (k < 0) return 0;: I, R/ J& y4 N" f' m4 w6 {
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;) m: A' g$ n. P0 i" x2 J
- }+ W0 N5 X' @8 _# X1 a
- run = () => {// 新线程2 V Y$ X1 _+ M: G& E2 p4 X+ I
- let id = Thread.currentThread().getId();4 s4 D4 T. j5 c/ g4 ^, f
- print("Thread start:" + id);
0 E7 X" }2 K6 G. z - while (state.running) {8 N0 o4 l3 E9 Q7 D
- try {
* K9 V/ N: M+ [% `# a3 v - k += (Date.now() - ti) / 1000 * 0.2;; m9 Z4 z6 y) |5 c, e, M" k
- ti = Date.now();: |' F; K) c5 C% m- `% V( t' D: @
- if (k > 1.5) {0 @, g+ U* {' |
- k = 0;, i- L0 L: ~; D7 Y3 i8 e8 ?
- }
" s: b' ?+ [2 r/ ] - setComp(g, 1);' Z4 {, w6 U* M) f) o. u- E
- da(g);
1 z3 f: q5 Q2 Y% p: N! L - let kk = smooth(1, k);//平滑切换透明度0 z U6 b- X' G% s; \6 I
- setComp(g, kk);0 O0 [$ o5 M" Q; X9 r8 Q% T! T
- db(g);
% m3 g1 I# M) _8 _$ F0 \, C8 H - t.upload();
/ z; c, V% B$ k6 s6 Y* r% L - ctx.setDebugInfo("rt" ,Date.now() - ti);
f* O/ M; C0 V3 z) L) K1 s+ v - ctx.setDebugInfo("k", k);+ |, G/ b2 T& T W) z) E; c g( |% C
- ctx.setDebugInfo("sm", kk);: n% A0 `- c1 @) A
- rt = Date.now() - ti;
- \. x3 a$ i/ {: m1 d - Thread.sleep(ck(rt - 1000 / fps));. ]! s' p( c' @0 o S0 c5 j
- ctx.setDebugInfo("error", 0)
0 i( f+ p' H6 l( T# k$ v. Z - } catch (e) {
0 A7 G. A4 t6 P+ P x - ctx.setDebugInfo("error", e);
8 y8 I, M/ s) J - }
4 i/ u/ z, m( B5 _2 q0 Y; p - }
3 O% d" t3 M& `) f3 l& O6 @6 v1 { - print("Thread end:" + id);
* {5 L+ {( n% u$ } - }) _5 y1 o4 Q, y, q$ C- W
- let th = new Thread(run, "qiehuan");
+ ^5 Q1 _: S) [) B$ ~2 t- n- ^ - th.start();
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- 6 ^. a+ z: J9 k; `: c3 O; ?" g- j" T
- function render(ctx, state, entity) {
& D8 ^% ^6 h3 i - state.f.tick();" n1 `) W2 l$ ]
- }- c. E; ^; B3 z
# d6 C/ e$ W: g3 n v7 F- function dispose(ctx, state, entity) {1 D, B4 N- y4 \8 z* M* o B
- print("Dispose");( w, `7 B& d" d! g; H# ]
- state.running = false;
, i+ D4 V( @5 V - state.f.close();
: ?" }+ y8 @# H& [) \ - }* S; G0 g1 Q, J& Y! {
- 4 ~2 `+ D w8 j4 J: v8 A5 x* W
- function setComp(g, value) {" r. R2 V4 l3 Y1 x, A5 H
- g.setComposite(AlphaComposite.SrcOver.derive(value));) S. x W( [+ o q4 j- M
- }
复制代码
! j. V. |* f6 _ Z1 ~9 d/ T1 Q" A1 r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。% ~# |$ ~9 a4 W0 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)' \, o- B0 e4 B6 v% C
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