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9 A7 h+ X4 A+ H% v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* [$ H, R2 M2 P9 p4 ?- importPackage (java.lang);
, g6 M! d, c5 B `$ T - importPackage (java.awt);7 v1 I7 g; t# Y* s
, w2 m% l& B2 X* T- p1 c# O, C1 V- include(Resources.id("mtrsteamloco:library/code/face.js"));
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6 X) Y+ x5 G0 s% N7 U& R. F- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);2 Z6 n7 P5 I) {" [) K9 o3 _$ \+ b
- ) S7 N5 k3 ^) v! W- S
- function getW(str, font) {& P$ M+ T |( X; M1 d) a4 G9 Y
- let frc = Resources.getFontRenderContext();
4 ^9 i3 M; l# u4 T3 s0 [ - bounds = font.getStringBounds(str, frc);3 x, ]! w: U: y% |- Y/ D
- return Math.ceil(bounds.getWidth());" f6 Y1 j2 c2 f4 o5 }
- }! J; Q Y# n! C; |' H8 { z6 P7 G
- : y: e8 Y {. G% K7 X2 w
- da = (g) => {//底图绘制
% `" b- n. x8 a K% x- O - g.setColor(Color.BLACK);
" B; ?1 A) S- K b3 _. i$ Y) M - g.fillRect(0, 0, 400, 400);
- Z g: M3 g, c# H1 K( f - }& c, y6 l- u, b; G, Y! f5 b
- J: l8 z: P! J, I' [) @
- db = (g) => {//上层绘制
/ `; M) A0 n6 S2 D$ V( L1 @ - g.setColor(Color.WHITE);$ v$ z s8 ~6 G" k' y$ [3 ^4 c
- g.fillRect(0, 0, 400, 400);4 g3 h7 H. g* j7 g# d9 W M! G" Q
- g.setColor(Color.RED);
) K3 L8 R% ~0 U, F5 H - g.setFont(font0);
; R, Z) P/ b: S/ C - let str = "晴纱是男娘";
' K" @, U l3 Y4 R9 U - let ww = 400;5 T6 z+ S! D' x
- let w = getW(str, font0);
3 U/ h" l: L! f, F' e - g.drawString(str, ww / 2 - w / 2, 200);
/ V( E( Y/ V3 F7 v! ?) i# a" F' y8 T - }
6 {- |2 S% N$ c; C o - ' z# `% p+ ^, Y+ n4 u& U0 }. r( m
- const mat = new Matrices();5 b+ N* [7 @- j1 i
- mat.translate(0, 0.5, 0);
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; Q/ R: R& O0 m" _/ J- function create(ctx, state, entity) {
$ M# x- y, ^$ `- A- S - let info = {
/ E8 w) F7 w' \6 Q1 ~% V - ctx: ctx,! c2 e D! i8 f
- isTrain: false,9 _% W& @( y/ Y4 g
- matrices: [mat],7 x/ `! l9 {2 M9 V% g5 }4 h2 G
- texture: [400, 400],
. A4 |8 B7 G* g4 v& ~* t+ O - model: {
0 s" _, {4 z" `9 m, n# q, s, c - renderType: "light",
" Z$ o0 n$ Z; _+ k* N+ \ - size: [1, 1],0 S2 [: Y/ [( W& G b6 N6 P
- uvSize: [1, 1]: m3 s/ z2 N/ d4 Z6 {7 d& P
- }
0 z2 r& Z& b& L( r5 @# K - }
' o4 Y4 J% Z% q) }! H - let f = new Face(info);. ~1 Q1 e+ l, d% w8 [3 D
- state.f = f;/ o4 i* [+ g4 m2 ?% C
- & s) ?2 Y2 j, w, C' X0 y* }
- let t = f.texture;& c( K( H O4 i/ G4 \
- let g = t.graphics;% a, c0 F" C& m4 Y1 e, b7 I
- state.running = true;
( J" }' A7 O! G: s. n- k+ u - let fps = 24;
; Y w" }7 `; I0 _: } - da(g);//绘制底图4 b& [1 c2 n; w; q
- t.upload();) k! f/ F1 C: {6 P
- let k = 0;
5 R5 X, d; w; E5 j: }/ @/ z - let ti = Date.now();
* G9 k7 P2 T, y - let rt = 0;
# R7 |) b# B; M' ~( g4 X( f - smooth = (k, v) => {// 平滑变化
. W& e% c' u# g7 P! N3 j - if (v > k) return k;
4 `1 i" v5 R( r' { - if (k < 0) return 0;2 G) \: g; c; H* o
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;1 ~% b" G+ [8 y, c) |; `
- }
; S: u5 q. e( O6 L9 t$ h4 c - run = () => {// 新线程4 V9 K, u6 D9 S
- let id = Thread.currentThread().getId();0 [3 U7 U; ~: B" j
- print("Thread start:" + id);3 S0 g! V# S, |/ J
- while (state.running) {
d4 Q2 ?% Q$ b - try {0 f( G( T* A1 W& i
- k += (Date.now() - ti) / 1000 * 0.2;9 U( C3 V9 ]8 R7 n, @, _2 i- h
- ti = Date.now();
3 O# ]1 B/ f" Y5 X2 j$ l8 B) B - if (k > 1.5) {* m; Y1 q/ L5 m9 C0 b+ X
- k = 0;
1 y% q/ B( j- F) l' L1 o$ V1 ~ - }& }8 h! b$ v1 T
- setComp(g, 1);
+ n8 L- C- U. R. |# R3 Q( f - da(g);
& |" k0 j: s6 k' X% |3 G1 s - let kk = smooth(1, k);//平滑切换透明度. N" u2 i+ c! d- Y9 G
- setComp(g, kk);
9 J" \' W: [8 Q+ ^ k9 Q - db(g);
* D0 k: `* C7 ~( z& c - t.upload();3 c9 j8 a1 z5 Q8 R: ~
- ctx.setDebugInfo("rt" ,Date.now() - ti);
8 R0 O8 P$ B. Q- {- d - ctx.setDebugInfo("k", k);0 Z. A" x" W0 t1 ? i: d
- ctx.setDebugInfo("sm", kk);
% _8 |5 C2 ~; B! X9 v - rt = Date.now() - ti;* s$ s7 G! a/ S7 @4 _% b
- Thread.sleep(ck(rt - 1000 / fps));
P8 E8 W( q3 T/ n a( p8 f - ctx.setDebugInfo("error", 0)
. ~$ @. A/ Y* ]( O0 |( T/ c' r - } catch (e) {
. ~) c+ S4 z5 n - ctx.setDebugInfo("error", e);
4 I0 R8 d5 X, G% h M/ F - }0 b: J2 ]! ^; w1 S
- }
/ f" b+ w' g5 q6 n) C, z& A5 ` - print("Thread end:" + id);8 X3 e; K- ^) Z6 F0 y9 k" l2 X; P; C% M
- }2 [8 K# L+ C5 d) `
- let th = new Thread(run, "qiehuan");
8 G* \$ y$ _$ l$ r5 Y - th.start();1 H7 ~$ c$ R ?! _# C$ a% z
- }
2 F8 x2 I( q0 E, h! y0 B, |
- A$ L9 D4 |9 u* Y; W- L- function render(ctx, state, entity) {
+ f( ^& E+ c4 h# o; |/ Z - state.f.tick();
4 l+ t3 o6 M" e9 z) H$ \3 P2 u - }4 a9 @$ a6 d9 u3 M( ?4 ~5 k
! ] F: x/ \4 f5 f* R- function dispose(ctx, state, entity) {+ `, V6 `8 x1 t3 _7 n
- print("Dispose");
7 B6 R( A; ?5 Q - state.running = false;
# d1 {! ` f0 ?& ^ - state.f.close();
8 a( g# D- z8 s0 b- v5 K - }% S1 e5 z; P$ i9 |7 o
" ?. E6 v- }" z8 j- function setComp(g, value) {3 H0 ]4 L( G- W$ }: M
- g.setComposite(AlphaComposite.SrcOver.derive(value));
* Q5 D% E$ f* \4 K0 s$ a - }
复制代码
2 f# N9 o l1 |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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+ W, \& r& n0 \* {顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)4 N3 t k0 H Y Y- V7 H6 R
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