|
|
还没有账号?赶快去注册吧!
您需要 登录 才可以下载或查看,没有账号?立即注册
×
# p% ^, q& n+ N+ `* G$ {$ b) Q3 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。: O4 n2 `6 G! n% l5 q
- importPackage (java.lang);8 `$ L9 y6 s+ H
- importPackage (java.awt);* L" ?6 A4 F: ~, @. C
- 5 Q% l$ M3 i( L! ]7 q# M6 _
- include(Resources.id("mtrsteamloco:library/code/face.js"));* S( k& s" [: h0 x6 X2 E5 ]# r3 C3 e7 x- ]
) J2 B/ w" @' L5 t T2 @- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
5 e7 p: C6 ~+ i - ! L) i F/ y: _1 V6 g$ v
- function getW(str, font) {
& Y8 ^: o% Y; r8 U6 K; v+ | - let frc = Resources.getFontRenderContext();) E: y" r( B7 q# ~" T7 x h
- bounds = font.getStringBounds(str, frc);# ?+ m |% F- n, G; O5 i
- return Math.ceil(bounds.getWidth());
) K* P4 h! D/ @6 c+ m - }1 g6 B) Y% i! m, I# m; s5 K+ \
' {! u& ~; I M/ U9 Y- da = (g) => {//底图绘制: h( C7 O; x; g2 J3 `9 o
- g.setColor(Color.BLACK);
; k ^" O/ |. O - g.fillRect(0, 0, 400, 400);$ {; `2 d5 X1 U$ E' X. Q2 I
- }* ]/ h% Y V3 ^0 r$ r
1 r2 h( I& g t0 V9 `- db = (g) => {//上层绘制/ v2 g3 C v" v5 @$ e3 K) \
- g.setColor(Color.WHITE);
" o- @$ E$ D# Z3 X2 ]7 s9 L - g.fillRect(0, 0, 400, 400);( }, _* u M. a% f4 Y
- g.setColor(Color.RED);& j+ F4 f- d2 O+ t' N
- g.setFont(font0);
7 j. Q. x# o5 V! H - let str = "晴纱是男娘";
1 ~1 w+ S6 X$ s" v: ` - let ww = 400;
- \- ?$ }4 X' m; p; E9 i1 K - let w = getW(str, font0);3 v4 Q; ]- J) ]9 ]/ |
- g.drawString(str, ww / 2 - w / 2, 200);
5 I6 e' w- f4 y. s! C% O+ l - }
$ l3 Q* ~( z0 r5 s @# I4 U: [
7 P- c, j, l9 I1 w' I6 u7 { m- const mat = new Matrices();
3 M O7 A9 [5 ?1 M& S - mat.translate(0, 0.5, 0);, r) D& F J5 \5 r
5 X! q5 a$ l: y' T9 ?3 w0 }- function create(ctx, state, entity) {/ ?9 {) b! z; h/ Q0 ?& e( y
- let info = {
; z0 A4 e3 d# Z/ u' ~# ] - ctx: ctx,/ Q; d; ~7 M1 y" c4 w
- isTrain: false,! s2 o) Q- [8 F0 b) [
- matrices: [mat],, L& l4 l, x$ D9 m- A2 B. ^
- texture: [400, 400],) t3 M* R$ l6 X% @1 W* X& j
- model: {
" t, x( u' }# W. U - renderType: "light",
" I" r' j( \: Z: t/ H+ }+ A - size: [1, 1],3 j/ C% c) v; |" ^% G
- uvSize: [1, 1]1 R5 T+ f( d1 V7 ?1 X, N9 U
- }8 ?0 t$ O1 Z1 U" W
- }# f4 h' W$ F: l, X7 p$ ^' C
- let f = new Face(info);: X& b/ B$ R+ o0 U# ^. L1 |
- state.f = f;
2 m$ h; ^" ^: {1 L1 q8 s( H4 R - - d3 n4 L* ~6 D& t7 j8 F9 c' q* x( T9 K
- let t = f.texture;
. E$ O. [5 M& \- [2 i4 Z* t6 ~ - let g = t.graphics;4 D6 {- S4 q6 n) R3 s
- state.running = true;
' f) v( I" U* C% K4 G/ l5 O4 R - let fps = 24;. u1 D. R( B- J: ^! J- o
- da(g);//绘制底图
+ ^' V( P6 J _' ?# U' D s - t.upload();
2 j( O# U) A+ v9 ?: Z8 c$ N - let k = 0;
2 ?9 G" l' q4 D3 B! o8 T5 z - let ti = Date.now();
6 T: Z, G# s1 { J* {) Q - let rt = 0;
" i/ I- k( v1 f8 |1 o - smooth = (k, v) => {// 平滑变化- _* C0 U& F6 C
- if (v > k) return k;
8 S r5 |& s% V- M* H7 o - if (k < 0) return 0;( x/ e4 c& ~$ J! {" m- p0 O3 s* q4 B
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;# I$ h* e& q9 g
- }' E; w" T; h6 b5 u9 z
- run = () => {// 新线程
# a* b! ?/ s. l/ k& K. M - let id = Thread.currentThread().getId();' K; h+ T w; R1 s
- print("Thread start:" + id);
& e& f5 I- G% V2 g - while (state.running) {+ k3 i F7 s% S% g) b8 H
- try {9 ^% ]/ R9 u [
- k += (Date.now() - ti) / 1000 * 0.2;4 J! g- ]! e/ t7 y8 _' O$ o: Q
- ti = Date.now();
" P' _3 K5 M8 w/ F - if (k > 1.5) {! B* J: Q0 L* y
- k = 0;; n/ C# {+ y# B: |, G
- }
* M. [* s j6 E4 { } - setComp(g, 1);
% f1 A* g1 |4 H) l. Q - da(g);
4 `8 G( p: P$ ? - let kk = smooth(1, k);//平滑切换透明度
% c# x; p* x* O& h+ M/ b0 R - setComp(g, kk);0 j+ b; G6 ~5 ~6 j' L$ l6 Z
- db(g);9 w, E9 V7 n% m8 f# @
- t.upload();& j& I# r; N6 |' a
- ctx.setDebugInfo("rt" ,Date.now() - ti);% Z; }/ _; C( R( \6 ^
- ctx.setDebugInfo("k", k);5 n N0 L) u1 o( S
- ctx.setDebugInfo("sm", kk);
9 i- x4 e% b6 m - rt = Date.now() - ti;% \# {9 B& R5 m& ?2 Y8 Z; K
- Thread.sleep(ck(rt - 1000 / fps));: [6 I0 O9 |5 n' g/ ~: ?* V
- ctx.setDebugInfo("error", 0)6 Y" v5 ^+ N* g; C
- } catch (e) {
" G9 S( i$ W5 F Z! p. k$ A. z - ctx.setDebugInfo("error", e);
" b( c% y% S. g U5 k+ v - }- b5 T1 W% Q' e- | x2 `4 x
- }
) f6 ^4 }" U4 h- E4 n# ? - print("Thread end:" + id);
1 R9 h, ^0 L6 s3 t6 ^4 U; o6 n - }
: M+ y+ _) Y: ?) J1 T6 @ - let th = new Thread(run, "qiehuan");8 B- X* e3 ?& H) R! B! ]' ?
- th.start();
: N5 v8 v8 c, z& ~9 j% ^ - }
) C y4 p6 C+ i+ n9 P3 z; m& V
3 g/ X8 w8 J9 _+ }0 k0 x- function render(ctx, state, entity) {
& O+ n" ?! C. h0 l1 d - state.f.tick();
! n: |- u$ s0 }) C7 a. X - }5 p G7 V% ^$ o% I: e6 N
- : P' Y1 L! I0 D/ I$ K
- function dispose(ctx, state, entity) {
- d$ E' m; \5 a9 Q- o0 r& r - print("Dispose");; G K& _2 T# C/ v8 M4 K0 |
- state.running = false;5 M8 m+ f$ M7 \4 Y& n+ C$ e& B5 _
- state.f.close();6 w# Y! m- c6 ^0 H* u
- }
4 S0 G" y8 W" z5 u) S8 | - $ E, _* s* I u1 Z: C
- function setComp(g, value) {6 Y% t- S: c5 J
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 `' a$ X6 p! ?' m6 D) E
- }
复制代码 5 v; p% j" A: S/ u2 P% `# n
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。
( Y, {7 f# \+ z) D& ^; M( b( p. F. I6 o8 E+ W0 C3 X: x6 j- P
% V5 K0 J, @7 r/ ]. 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)2 P. O0 {4 F: Q
|
|