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% v2 b9 U: }/ [' z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。
/ o$ e1 I3 z) l% K" O0 K- importPackage (java.lang);
( m3 Y! e' P/ m0 ]" [8 n - importPackage (java.awt);$ r6 L D+ E/ K: L" B* \3 l
- ; K. m7 E0 t2 |5 _5 A
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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I4 {( K4 x$ H; S& u; R* H/ p- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);/ a. k. `9 ^* x5 Q. c
# }/ Z2 s/ u) a; M* u1 Q0 Y- function getW(str, font) {
; c6 {" U- b! R" u: x - let frc = Resources.getFontRenderContext();
' g6 [9 ^7 d4 h# A - bounds = font.getStringBounds(str, frc);7 C( J2 Y8 T4 B+ N
- return Math.ceil(bounds.getWidth()); E/ r' N5 B# i j7 |. X
- }/ u! @7 w( P/ q, P, R7 n, H
: H3 _9 F7 P3 p' y% e( Q; m, Z# H- da = (g) => {//底图绘制
+ k$ y L9 `, M# ^9 G - g.setColor(Color.BLACK);' z& V: s( P( O6 q
- g.fillRect(0, 0, 400, 400);8 u, J% P) W5 c
- }- e' l# ]% Y* e0 N, E
- / v/ F% }, K# P8 @4 d# M
- db = (g) => {//上层绘制8 S9 f; t1 l+ }, ~
- g.setColor(Color.WHITE);
3 N3 ]# k7 T. {- F - g.fillRect(0, 0, 400, 400);
" _* m9 o: m3 a! a# g f ^ - g.setColor(Color.RED);
0 O) F- [5 }7 f& X - g.setFont(font0);4 r) T3 M" y7 N* [
- let str = "晴纱是男娘";8 u) J& t2 D: `4 h/ G. x
- let ww = 400;6 V p" P9 L2 l8 ]: j) O
- let w = getW(str, font0);- W* `; c; i; q
- g.drawString(str, ww / 2 - w / 2, 200);) s6 T1 B0 H( t% o3 T, f
- }
! E, M U! B4 v, y3 p+ f4 {
$ N6 i5 h( g1 u* y" D2 Z$ Q9 T- const mat = new Matrices();, {8 P8 L8 A$ a* i
- mat.translate(0, 0.5, 0);
* q6 p7 w2 r0 T
! `8 b0 C, R8 ?( j) M8 q- function create(ctx, state, entity) {& P# Z- e" A) l' X" ?' k
- let info = {+ A8 B/ G4 M( }" C2 h- I
- ctx: ctx,
7 [1 b+ {' P& K# J4 R, ~ - isTrain: false,, t# M5 i1 b2 v8 t4 J: {
- matrices: [mat],( p I1 F- E/ S# {( J
- texture: [400, 400],, J6 C% y" J' F" E& |" O; {, |* d
- model: {
6 ~9 U4 }8 H4 p, `" n2 ?8 v+ h - renderType: "light",: y9 w5 @0 I$ h$ W
- size: [1, 1],$ z% g6 R* d: G# h! q
- uvSize: [1, 1]
; g/ ?. p( I5 F5 B# B - }
8 {8 e( y4 z: d1 H1 Q. l - }7 O; ^* Y. B" x$ R
- let f = new Face(info);
! t/ q# J/ N% x: y. Z& O9 e- F - state.f = f;
, `/ ?( `: {. `5 q5 V. k+ A# | - & U+ M8 V# z' ]2 [
- let t = f.texture;- _# M/ I. W5 K+ F2 ?1 |
- let g = t.graphics;6 e+ _- S: d+ n( X8 I% w. g
- state.running = true;6 {( o, q3 V c6 r
- let fps = 24;* p( b4 K1 T, }# U5 G7 N% c
- da(g);//绘制底图
; O! {1 T5 D; d) P5 `. o4 w - t.upload();, O8 b9 o. j5 ~% q0 c
- let k = 0;1 G0 v K! X+ n/ d7 l- B4 G- X" V
- let ti = Date.now();7 T5 @) }! a+ L; ?* E1 H! j6 Q' X
- let rt = 0;" j4 c% e6 O4 d; ]
- smooth = (k, v) => {// 平滑变化
7 N/ b0 _; }# Y' Y0 L4 G8 |0 H - if (v > k) return k;
" v9 A j2 H2 |2 ^' n- S/ e: z - if (k < 0) return 0; ~5 `+ e- Y8 x; N6 j. c# E
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
/ K4 }5 B# }* S) u+ G - }4 W: u; K, ?' s, \9 z! b
- run = () => {// 新线程/ X! a. z. E. {9 C% k# S/ M
- let id = Thread.currentThread().getId();: s' f& W9 ^$ u. }+ I6 k, s' g. _
- print("Thread start:" + id);1 |; p. }; \' A* v- E6 `
- while (state.running) {
) B( v: E; ~* [7 {. | - try {
4 P( ]% @: G/ i9 N3 b" D! G1 `* X - k += (Date.now() - ti) / 1000 * 0.2;; Y# n6 o" l& N, d
- ti = Date.now();
& {1 X* `* u' R. s% k* W y - if (k > 1.5) {8 v5 i4 S; q: A" ~- B8 M
- k = 0;0 Q: S: Y9 x& u5 A1 C
- }
9 C4 w. a9 \3 v( k8 N' i - setComp(g, 1);, |# F% K( r4 m
- da(g);
) R. G8 U% M* a - let kk = smooth(1, k);//平滑切换透明度" |( u( f9 v- U, `
- setComp(g, kk);/ F* {, z. S" z7 I! T6 H+ K% z0 C
- db(g);8 B+ |# b; }6 }& m
- t.upload();
! `$ G2 W4 u) b. O' o" ]0 _' T - ctx.setDebugInfo("rt" ,Date.now() - ti);5 N: P9 r o" ?9 Y
- ctx.setDebugInfo("k", k);! J3 O) E: @$ P7 c# s& g
- ctx.setDebugInfo("sm", kk);
3 Y( W) E5 O& V$ x: y" n7 n - rt = Date.now() - ti;3 I2 Y' Q5 B( M" [
- Thread.sleep(ck(rt - 1000 / fps));
/ \9 C* Y4 t1 s+ k4 I$ h - ctx.setDebugInfo("error", 0)
1 _6 h4 T$ r2 Q, |3 ]7 y - } catch (e) { G( r- } i( c; J( s
- ctx.setDebugInfo("error", e);. Q. r2 m+ J# M$ H! @, b
- }2 h1 B) \1 B- g& s) ` S1 P3 w
- }0 X1 z( p5 ^ t" C/ F) M
- print("Thread end:" + id);
, A# G- O4 F E8 S. z5 P - }
/ K5 {; _! z5 P3 Y2 S - let th = new Thread(run, "qiehuan");6 p7 A9 y; ]) A$ H5 X$ K
- th.start();1 v' N: Y0 A( h; V
- }
- d1 W8 [0 q/ D$ u+ r' [0 P
+ K* p; H; X1 B: T- function render(ctx, state, entity) {0 m8 k2 Y) x2 u% u0 z
- state.f.tick();
, y4 e& k8 t. \ - }4 o2 {$ U. W* M$ S$ L, |
9 h: k8 n1 [* w3 u. ?: e e- function dispose(ctx, state, entity) {2 h$ d' |# g3 a1 u+ N) r, p
- print("Dispose");+ C, h( e3 p; L& y! e6 }( Z
- state.running = false;$ F k; r; `& F0 F
- state.f.close();
" ?+ y9 E- `0 \; K# H) i; [ - }1 G" S7 h9 N8 i f
- 9 p) [! k0 x, T" X$ {# q
- function setComp(g, value) {
* h/ I7 D: |8 L" t# H! g - g.setComposite(AlphaComposite.SrcOver.derive(value));
& W3 p" i& V2 {, [, {3 X - }
复制代码
0 F& m6 K3 b0 i; n$ a8 }6 a7 c! p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; I2 `# Y' M2 m; e! c9 t) K. I, L/ v" T, [! Z) Z1 w! d
" j' }! _- B7 R! E顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( C0 N: ?( W& i3 Q1 M7 W
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