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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。6 q: _' A% ^* F$ R
- importPackage (java.lang);
5 J" @6 t# i; l& [ - importPackage (java.awt);
# x- k& E6 Y% ^2 H, ~ - ' G+ J1 X% L; X
- include(Resources.id("mtrsteamloco:library/code/face.js"));
# p% Y, c4 i% E8 f! j. O# d6 R
7 a3 H0 U/ m6 _$ M2 A' F7 C7 C- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80); `) W% E& Y; K# X( r# b% p
% _( G0 ]8 j* }& H! J' \- function getW(str, font) {
& I8 M: P8 e( s - let frc = Resources.getFontRenderContext();" S2 T1 f5 w3 J" b$ N
- bounds = font.getStringBounds(str, frc);5 H. G4 L* ]# u
- return Math.ceil(bounds.getWidth());
( S3 m7 m# d( ]. t/ A - }& b4 q4 ^; L7 e k+ }$ M- |
7 ?/ f- C; q4 [- da = (g) => {//底图绘制
6 }+ K9 [" K+ x - g.setColor(Color.BLACK);
9 @( H0 I2 @$ y3 L6 s - g.fillRect(0, 0, 400, 400);
5 T$ B0 g+ x4 X# F - }
& I/ f4 b& \( r7 h - 7 B$ X5 f- m+ B, ?: y
- db = (g) => {//上层绘制3 g5 F6 r: o8 U+ m8 `+ g/ `4 u+ b. q
- g.setColor(Color.WHITE);
, W H+ k; N5 H1 k - g.fillRect(0, 0, 400, 400);
5 [" ^) ?8 S5 E0 R, c5 i; K - g.setColor(Color.RED);
% N% X! ]) @! u3 Z5 V+ r* n9 m - g.setFont(font0);
1 H3 J" e# b; V7 z - let str = "晴纱是男娘";9 z# J: h7 [$ _ }" `' v/ L
- let ww = 400;
+ }/ s: g, `+ M' D - let w = getW(str, font0);. m# D* S9 l t0 b$ |* ?/ n
- g.drawString(str, ww / 2 - w / 2, 200);
5 r, {6 {7 |# X - }
/ T) q5 a' j& Z% k0 C$ [. P
8 c0 [( x! P% C7 q6 }- const mat = new Matrices();
% T9 y1 d' E' p0 c) f; ^ - mat.translate(0, 0.5, 0);7 p! x5 G8 K: r; p: q4 p
- - V9 G1 {: }0 v( b* q, N" Y
- function create(ctx, state, entity) {" L5 H$ e2 e& C; O3 v
- let info = {
0 ~! g+ r5 p/ A% X- K0 I1 ] - ctx: ctx,
5 O4 R- w: I$ R% z" \" {) h0 l - isTrain: false,! L' H8 K' Z; O ~# ]. y% H
- matrices: [mat],
5 ?+ U) h; J4 @, |7 J I - texture: [400, 400],
6 ^$ [) o5 f* P) o6 j; ~0 l - model: {
; z+ G8 ]. Q" K1 X* V o% R - renderType: "light",
( A, b- Z9 X8 ^- _# t: c$ z - size: [1, 1],
+ i/ g* }6 H, n - uvSize: [1, 1]! A5 x, D1 j" \4 E/ ]3 {% z6 P
- }
7 h2 y9 g$ T* G) | - }' {2 r* O! ?& t! L
- let f = new Face(info); p. I$ J" D/ A
- state.f = f;
* T' @0 E5 ~7 \# x6 ] - / g. m- h, x" R5 i
- let t = f.texture;% F: [+ s! y5 c: X
- let g = t.graphics; q3 r' p" o" {; j5 G& L
- state.running = true;8 u7 q4 L2 ?4 j* O D$ `: ?. }; P0 X
- let fps = 24;1 E! c7 D( f) I* \& Y! r- c
- da(g);//绘制底图
8 h5 d, @4 g& R - t.upload();
* q" {, a/ N; s - let k = 0;
+ S# F: Z: e6 Y3 Z! M! C5 G - let ti = Date.now();8 G$ r% {' N% l; l4 k+ V0 q
- let rt = 0;; Q. P5 m1 |7 S% n+ `5 r( {! p
- smooth = (k, v) => {// 平滑变化
4 ]- p) E, z5 X8 B p - if (v > k) return k;
# R/ c- I& e' S4 w2 e5 M; ? - if (k < 0) return 0;
7 S" l# J+ L" b. y+ w# Y$ T - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
7 q. |( J. a8 ~ - } R6 i: F) F7 k1 _
- run = () => {// 新线程5 z- m) g5 e/ P' m& G; d
- let id = Thread.currentThread().getId();
/ L: @# ?$ w# Y - print("Thread start:" + id);
6 D. a. q' x4 d% K - while (state.running) {
* ^* G0 o! }/ d ~. V - try {
* @) ]5 O, {0 r$ E - k += (Date.now() - ti) / 1000 * 0.2;
: H8 v b O: ?4 ~2 N- X. M! A9 m - ti = Date.now();
/ y; R/ V. `$ K2 @6 ~7 n! E - if (k > 1.5) {' m. N5 L3 L& ^5 C7 {, _$ \
- k = 0;- p7 v2 ?0 `& w: g+ h
- }
% H) W* ]: o1 J4 Y# x) c - setComp(g, 1);
' E6 c; L! }- J# t- D- H1 y - da(g);
$ Y3 ~; q( X @0 m - let kk = smooth(1, k);//平滑切换透明度
, ~+ F; A6 p9 o - setComp(g, kk);
$ h! r$ d- m0 s% c4 N- | - db(g);
/ f2 u }3 }( h3 r& z - t.upload();
# \) G# c+ F' i' e$ d x. b+ X - ctx.setDebugInfo("rt" ,Date.now() - ti);
, @6 N) W& j Z$ J+ t8 A0 W - ctx.setDebugInfo("k", k);( C6 K# _4 l2 Y7 M: S% m; C
- ctx.setDebugInfo("sm", kk);
m- ~, c. ~$ w7 Z% T - rt = Date.now() - ti;4 g0 [) S: i0 ^2 c8 b: R$ ?# ^
- Thread.sleep(ck(rt - 1000 / fps));+ j- `4 s' |, S3 Q1 @
- ctx.setDebugInfo("error", 0)- M2 r' b4 W' l+ n8 v
- } catch (e) {
: d& c* z5 H, t" M - ctx.setDebugInfo("error", e);
- {/ W! r+ j1 m - }0 i" |3 v( s6 {% k
- }/ L) [8 n! K7 M# D" X! B d
- print("Thread end:" + id);
7 N" w- O; ]5 U3 u3 B' v# k: A - }
3 d- J, l! ?6 p - let th = new Thread(run, "qiehuan");( F6 s4 U1 Z- {, F4 B
- th.start();
0 d7 K: y7 }4 v1 D# A% D, L& q% E - }
/ U& y3 R7 P) B& X0 E2 K( c
% E8 h* y# v1 h5 Q4 n4 I# n/ M- function render(ctx, state, entity) {
! y3 d9 i$ Z2 |' ^1 Z* U - state.f.tick();, X& C) p" g' W2 Z
- }0 J; F" Q# f: ]; `# b8 R2 j0 f- U
9 b4 ]; E- U" [" P/ P1 O! k- function dispose(ctx, state, entity) {- H+ C! U) X' B; L
- print("Dispose");! O+ P6 U: c+ f! N5 |
- state.running = false;
/ D0 z) w3 I |! h9 w! D - state.f.close();; h3 n( }: z8 z
- }4 ]/ q4 F* |% M3 h0 R
5 c7 y% b# r) M5 }3 e2 N) P- function setComp(g, value) {
2 ]! @1 L3 t6 _% \% U - g.setComposite(AlphaComposite.SrcOver.derive(value));) ~4 u$ v6 q+ z6 ]
- }
复制代码
% t: b" J9 G6 }. B2 |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。% ~( A, {9 C" W- S6 w" Z
% T$ _$ F }8 F' A1 g3 ]7 a. ]/ Q' A8 G2 E3 F v: C& x
顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( J) u, o& g: i9 y# b% h9 q3 @! i; O
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