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- `# N: ~1 z: _$ F( p! z, r# Q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。
. Z; d% W' T& d3 b9 w# t% s; G- importPackage (java.lang);+ W6 W. }0 T, _$ @
- importPackage (java.awt);% ~: @) Z; L5 G
- + g4 O- G. w) F0 P
- include(Resources.id("mtrsteamloco:library/code/face.js"));
% B4 d* G, p0 C5 V+ x z7 U$ d
! Q, o: @* g, J- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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; G' ] D" h" Q1 u; B- function getW(str, font) {3 R4 _: L7 q4 I/ E
- let frc = Resources.getFontRenderContext();
: \* f2 X7 ~6 g- _1 | - bounds = font.getStringBounds(str, frc);
# d9 z: J9 x* D! r! j" f - return Math.ceil(bounds.getWidth());% [9 \1 \8 S9 ]/ U; z6 r7 N
- }
* l5 y r# V. v) H
4 L% x6 A9 j* Y9 C9 S, o- da = (g) => {//底图绘制9 a& |& W" `8 L0 G7 t9 h
- g.setColor(Color.BLACK);
( h8 ~1 L6 h# {( x' s. V - g.fillRect(0, 0, 400, 400);
- r3 g2 P5 m0 W5 B' s0 C - }
# h& Q; {% ^# y/ \1 m
: v+ n' y; u* Z: j7 ]) t- db = (g) => {//上层绘制
8 _9 L" F6 ]; N - g.setColor(Color.WHITE);# O& {9 @' s) q& Q9 t7 P6 u/ V
- g.fillRect(0, 0, 400, 400);% G v# z+ \3 X
- g.setColor(Color.RED);6 r4 s) c! H0 S% `4 B3 Q' ], C
- g.setFont(font0);
% I" N. p8 p: m+ D- \ - let str = "晴纱是男娘";+ p8 [! | _* }4 ~; T8 _& T
- let ww = 400;
3 Y, u" b# S1 }- ? - let w = getW(str, font0);/ |2 K9 M# \3 T0 Y; O+ g" o
- g.drawString(str, ww / 2 - w / 2, 200);
( u( p& v" m3 {8 _, e: X1 l2 X: E - }6 U, m" v9 f% }
7 n5 H* y+ v6 E4 c# T4 U- const mat = new Matrices();
7 n n9 s; w2 V- i6 x% u% a V - mat.translate(0, 0.5, 0);
. l. h, I/ M5 _# u1 S& g4 _2 W1 | - $ P! R; y# ^- d
- function create(ctx, state, entity) {
. y7 K6 v' `: D: t |& @/ d6 G - let info = {7 e! u' C3 f1 H, T6 o
- ctx: ctx,: [/ h' h0 U; t+ }& X
- isTrain: false,
" k. E8 d* ]- l) ? - matrices: [mat],+ }& g8 ^( p8 H$ g3 C$ R, p& y
- texture: [400, 400],' ]- X4 C5 h n
- model: {' Z" _: M+ b* J* a s5 m L. L
- renderType: "light",
5 R' Y9 \' o* k4 y7 {( Z5 ~ - size: [1, 1],: F4 A/ w- m0 a( t6 _2 b
- uvSize: [1, 1]
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- }
1 |9 S1 s$ v* L1 E - let f = new Face(info);' @/ ~& ^1 a$ j' F4 }7 Q
- state.f = f; R8 a9 D8 Y0 w% v+ y$ X+ q) s$ e
7 C( b9 U2 Y) Y; y; a: c- let t = f.texture;
; v- f) \/ o5 s: x - let g = t.graphics;
3 c0 W: `! t, H: A* H; @# w - state.running = true;
: ~7 R u% W" T8 O - let fps = 24;4 ^5 U3 M0 z- k& U5 w4 w
- da(g);//绘制底图
( ]- x7 w2 I3 J" F9 Y; T+ X - t.upload();
8 i* y6 {4 A8 G& J - let k = 0;8 U) o9 R% e) {. _
- let ti = Date.now();
1 k5 e3 y# ^' G7 Z/ D9 |# i5 \ - let rt = 0;+ N" l" [& G6 P: J/ U% P ^
- smooth = (k, v) => {// 平滑变化2 A7 o! i; N! U$ S% O5 t: ^5 m/ B
- if (v > k) return k;
. g* S, U3 r2 n) E9 ~+ j8 o. ` - if (k < 0) return 0;
" T2 Y# @$ Z1 X - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. y/ c F! y3 B8 g/ s" q( m4 ] - }
; \' j# O P$ }1 \ - run = () => {// 新线程
* M9 r0 v1 A1 C1 D! _ - let id = Thread.currentThread().getId();7 V9 q F7 @- a
- print("Thread start:" + id);$ {& J3 N5 k2 U) G u8 a+ V
- while (state.running) {
& C6 _( Q& W" S( I5 G - try {! f" |, J& g/ n7 J; [# w' L; F
- k += (Date.now() - ti) / 1000 * 0.2;
- G O4 n" e/ k* V) o2 _ - ti = Date.now();
& Z9 s! Q( N* ~$ m" V2 X! q5 E - if (k > 1.5) {
: b8 Q4 U) z$ M7 V+ n4 l - k = 0;# u# J) d( o/ J8 c- {1 w
- }2 ^6 N2 q6 w5 D7 i: M% C
- setComp(g, 1);2 Q- d5 A% g* G0 w1 O/ E' D
- da(g);1 O' `. D* C+ B) W- E. y
- let kk = smooth(1, k);//平滑切换透明度
1 h0 ?2 T7 |# H/ l - setComp(g, kk);
}" F8 r# n4 ]9 w9 z: ~* W- {% A - db(g);
* N+ o9 m# @ l - t.upload();1 i% M( n+ O' L- [
- ctx.setDebugInfo("rt" ,Date.now() - ti);
9 L8 Y/ `7 D4 U4 d s! J - ctx.setDebugInfo("k", k);
3 |0 @* Q2 @$ f( X& n4 t - ctx.setDebugInfo("sm", kk);- i6 Y. n8 r! t5 N
- rt = Date.now() - ti;+ a& a) b, T+ n, e1 d2 G$ y0 V
- Thread.sleep(ck(rt - 1000 / fps));
3 h( A* q/ _! j) i$ O - ctx.setDebugInfo("error", 0)
& G) S0 S- \6 a ^- D, z% e - } catch (e) {
7 Y0 s# c Z( ] - ctx.setDebugInfo("error", e);
3 h5 e9 R5 r( U - }' X* u" r2 O+ w( G4 c) L4 s7 F
- }; R6 M$ ~; c$ A7 O) @& W1 o
- print("Thread end:" + id);7 L. s6 z$ W2 e" @
- }
1 y7 g: ] f- z - let th = new Thread(run, "qiehuan");
+ Z% _0 s5 U( J2 { - th.start();
# x2 j) S* Z3 s( G. r - }% J0 X/ o* D" y+ ^3 j
- ! G$ o. n5 ~. Q) o
- function render(ctx, state, entity) {# s* O6 `* X& ? R8 x# n
- state.f.tick();4 `9 K& H' E) l; b# U- q* z% f
- }0 h/ L- y: S- V; v; e
* o* f" G2 q" r: A- function dispose(ctx, state, entity) {' W: o) L* s: U
- print("Dispose");
* J8 _7 C0 i1 p$ \ - state.running = false; M8 Z* q4 |( ^& @ V4 Z0 @/ B3 ^" t! a
- state.f.close();
. d6 N1 Q& h% r1 P% J' ` - }
7 A; A+ a5 u" R% d7 Q! E! s z - / O: f7 e4 T# D9 _: f- w1 K
- function setComp(g, value) {
* F% f1 @/ \- N - g.setComposite(AlphaComposite.SrcOver.derive(value));
, d9 R! o0 m+ I1 u& `* P7 ` - }
复制代码
4 X' m/ o: W; W9 W% H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。8 q4 _* R/ E& k% I2 Y+ m
5 y/ T1 j) L0 x' b; c; ]
# k | ?5 V1 w0 x- I3 P顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)
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