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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" d4 s2 t2 l! S
- importPackage (java.lang);
8 _2 d" _) a' i; Y - importPackage (java.awt);0 r0 y9 u# _/ T( |
0 W3 x# ^" t8 i/ p1 s0 s- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);: A6 u l; k& I: Q+ v8 X
0 s* p* v6 @ @8 d' R- function getW(str, font) {2 V: r/ N0 A- Q/ \/ b
- let frc = Resources.getFontRenderContext();# G: g+ M7 y* N# Y6 V" V- v. w
- bounds = font.getStringBounds(str, frc);
3 h' l3 m8 z8 u6 c) \' ` - return Math.ceil(bounds.getWidth());* g4 Q. h h7 {8 j t) E
- }
4 S. z- T' L- K9 F" y - 9 B6 _; y. d0 u1 j: R
- da = (g) => {//底图绘制8 H: ]1 Z) B, \8 T9 J1 F
- g.setColor(Color.BLACK);3 Q9 { n' G5 d: f7 E0 e& @
- g.fillRect(0, 0, 400, 400);
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- 7 S+ D# i2 v& w
- db = (g) => {//上层绘制! j$ a q# `5 e# j
- g.setColor(Color.WHITE);
9 x: z: s+ f9 ?6 M6 W7 E4 A - g.fillRect(0, 0, 400, 400);5 V2 T2 i3 ]- O! n5 L2 o
- g.setColor(Color.RED);
8 j2 j! o0 X7 G: \+ q - g.setFont(font0);+ X$ V7 |0 T+ B$ j$ T9 M+ }
- let str = "晴纱是男娘";! ` S) ~+ ?1 l0 f" H9 B L
- let ww = 400;
. W4 _$ L# j3 L! f( d8 u - let w = getW(str, font0);
- h. K$ a$ {8 [( p, k- l: K! v - g.drawString(str, ww / 2 - w / 2, 200);
) u: O: @* L2 J - }
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7 ]" m% E7 y2 }$ q- const mat = new Matrices();
' C; Q* v3 c0 y; {. k) T. E - mat.translate(0, 0.5, 0);
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$ L7 o2 L5 s9 i! C) H, a- function create(ctx, state, entity) {
- |$ ?3 P9 D" |1 X: M* r4 b - let info = {. v( p" q% G; q7 |: J) O
- ctx: ctx,6 w1 i# z3 J9 W" h) h6 K0 y
- isTrain: false,
3 S( \6 v: I; l4 A" q - matrices: [mat],
0 g! y0 i& X" _ - texture: [400, 400],
* Q" C/ I- u4 b3 q! j O - model: {1 \$ b0 ~- `9 P2 A5 E2 `% O$ s
- renderType: "light",+ A8 s" a3 W7 |/ ?
- size: [1, 1],
: H& O4 q8 u# K/ P. L( o/ I - uvSize: [1, 1]
3 u2 K: ^0 j8 ?: a/ K0 c - }
! b' b8 i e5 Q: _$ b$ L - }
# }8 P3 p, q+ c e - let f = new Face(info);+ d* C5 i5 K& C/ @/ i3 n s- B' s
- state.f = f;; p Y5 S, {- @. ~7 X, y; Z0 T3 Q2 a
3 f2 F r* F4 r. b- let t = f.texture;' z5 P( T$ @- B9 f& P
- let g = t.graphics;* P4 l1 w0 n* V% c3 w8 Q
- state.running = true;
5 H2 {4 _6 v | H - let fps = 24;% A" g( I- y/ x
- da(g);//绘制底图& v5 [* S: @3 h! N9 o( ]) \% s
- t.upload();- k$ N4 M3 t# L( w7 G9 A
- let k = 0;
8 w4 r, T, o% `5 H9 d+ V+ A - let ti = Date.now();* v2 O2 |7 m' O/ b0 b1 s$ Q
- let rt = 0;
" n0 W$ ^" j( ~% Q/ Q - smooth = (k, v) => {// 平滑变化
1 }. y& W8 Z/ v" x* q' M - if (v > k) return k;* B" z8 c: |' ^& l5 I8 G" N
- if (k < 0) return 0;
- J' V- }4 M& m; j/ ]% ^- E; `! X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
6 i3 _$ Z: H6 @& l' | - }1 E1 y% u: v& B- C; O2 G) i
- run = () => {// 新线程* u6 @8 x4 V0 i0 l- G, K- J% U+ Z
- let id = Thread.currentThread().getId();1 ?: D; ^. e- f' Y: P) {+ b( W
- print("Thread start:" + id);
0 I7 z/ S9 }+ Z1 B9 } - while (state.running) {
8 v, z r# s1 R3 u - try {
( D$ V6 O" y8 A& b - k += (Date.now() - ti) / 1000 * 0.2;+ o" ^8 c( G* y' u0 g
- ti = Date.now();' ~: {/ X7 Y c/ ]' x4 }' [4 I1 r
- if (k > 1.5) {+ I# i5 U" s$ y; m: [9 }3 s9 N' D( J
- k = 0;" G, [, L; e F# i3 z: t* x3 H! O
- }
1 t. h$ J* S% E$ Z3 k9 K - setComp(g, 1);% ~9 X* ~! i, |# U0 r D% A
- da(g);
+ F" T/ S- y4 d3 P1 V - let kk = smooth(1, k);//平滑切换透明度: h8 I! B) Z% p, E9 z
- setComp(g, kk);
' X$ P2 U; X+ U% }8 c5 X# ~( W% ] - db(g);" E- n! X: X. g9 {( M$ `8 ^) B4 _ {
- t.upload(); s9 M$ Z* N$ w
- ctx.setDebugInfo("rt" ,Date.now() - ti);
" A$ k+ C) ]7 t3 z$ E* i - ctx.setDebugInfo("k", k);. @* p4 R, C/ z7 ?$ x+ J+ h& T
- ctx.setDebugInfo("sm", kk);
1 F4 D! i' }) b' G, A; H9 t, p - rt = Date.now() - ti;! x4 Q' s& L/ g0 ]: I
- Thread.sleep(ck(rt - 1000 / fps));
6 h4 h6 K8 S6 I - ctx.setDebugInfo("error", 0)
' @. T0 {1 S4 j- w: m - } catch (e) {
% S0 V( Q4 s+ n1 { - ctx.setDebugInfo("error", e);9 c& F w- @ Z
- }
! m7 b: b) V6 F9 [% s - }
' v1 X" V$ Q; o9 B' f - print("Thread end:" + id);9 o" z. _4 e% L7 H! I/ j8 j
- }# I) b% Y+ p! I; B- j& Q
- let th = new Thread(run, "qiehuan");
) [3 @1 b2 p) Y - th.start();) I& N, Z$ E% G G. W- p6 `3 L
- }
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0 b' ^9 I3 {! g+ j- function render(ctx, state, entity) {$ S5 |( B6 @ Q( B2 E `
- state.f.tick();
2 l8 f$ k8 N5 p4 b% Z6 `/ Z - }
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- function dispose(ctx, state, entity) {, s* k, g; g% X
- print("Dispose");7 b6 }, l; H% G2 i
- state.running = false;
. j. ? s) l ]8 s - state.f.close();
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) L- F3 A# Y: Y$ d& |" B7 j- function setComp(g, value) {; s1 ?9 n- S7 a {. o: Q2 f
- g.setComposite(AlphaComposite.SrcOver.derive(value));" Q% V8 b U; { }/ D, _
- }
复制代码
8 o) Q# v7 K' A( [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。& z S# B2 h# g4 g7 B
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: n# D I2 m" x$ F* B |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' U! g% R- i/ R/ F4 ]
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