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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。
5 D7 O% b$ c1 P: s: g B9 ~- importPackage (java.lang);5 R2 r" D2 Z& E9 N
- importPackage (java.awt);
, d) i5 ?" X3 O3 |8 E8 h - 0 U% C/ m+ @5 v' f: g( k
- include(Resources.id("mtrsteamloco:library/code/face.js"));2 ]3 `4 _( v2 i# O N" V$ _4 U
; j0 I( d" T) x1 K6 ?8 G, p3 N- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
9 V9 V1 T `8 V j. ^
" l c+ C! K! u7 \- function getW(str, font) {! F9 _. V8 C) b# e$ d
- let frc = Resources.getFontRenderContext();
' k, t* Y3 i a' L - bounds = font.getStringBounds(str, frc);
2 e% S$ T+ }( O: @% E4 {8 J - return Math.ceil(bounds.getWidth());: Q* c; a9 m" j1 r5 d4 m
- }. w, b/ K% ^ e4 b+ L' S
- # f9 L# y1 p# \. ?1 b/ f3 A6 c
- da = (g) => {//底图绘制
- E) E; S" b7 N+ Z2 w - g.setColor(Color.BLACK);% l6 ^+ Q( b) K2 ]
- g.fillRect(0, 0, 400, 400);) X( l3 G/ V; y7 B9 o
- }% o7 s7 p( U2 z
4 J4 C% L* C2 I0 X; o" b- db = (g) => {//上层绘制
! I$ y2 P" F. ~ - g.setColor(Color.WHITE);- Y' R' j% l3 Y' m% S
- g.fillRect(0, 0, 400, 400);
$ t) P+ Z1 n( H - g.setColor(Color.RED);
' u, E$ l6 H4 X0 S. R2 c - g.setFont(font0);
+ F' o* s: y; s: x$ | - let str = "晴纱是男娘";$ U$ z% h, y9 N4 M, _; ~& i: o, S' D
- let ww = 400; w' o! c n' c& {6 N/ x
- let w = getW(str, font0);
5 t1 D, ?8 L) e3 G5 D( I) R - g.drawString(str, ww / 2 - w / 2, 200);' @6 n, `) H' [6 k9 d* K9 r
- }! r$ A/ W# F9 ?$ p; N7 ^
- ! _8 m" p2 K( y( g) O) a
- const mat = new Matrices();
7 n7 Q6 L1 U/ ~! D% [. B- d! n - mat.translate(0, 0.5, 0);
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- _8 ]+ B5 y3 W6 n: y- function create(ctx, state, entity) {
# p: ?, a, p$ s9 f - let info = {! e) t% t; ?! x6 M" i: x
- ctx: ctx,
) N( A g) f. \7 t2 P: B - isTrain: false,# i3 J; l1 T4 O; L1 V D" h4 ?0 `
- matrices: [mat],; F0 w1 m. a; F$ T8 n) C
- texture: [400, 400],* r4 t0 A* N; I% r7 K" a: n1 `
- model: {
+ J% n) _ `6 ^1 K5 V - renderType: "light",
F) H' G* C+ c2 _' j - size: [1, 1],
) d7 n( F( ^ i9 B u4 y8 u) r - uvSize: [1, 1]" }4 ?7 h. w: H
- }
* e% m9 E3 a/ q4 t - }) }3 S/ J( S( v
- let f = new Face(info);
! z Y S7 U) k, S" w& R - state.f = f;
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- S* N# L7 C( k3 `- let t = f.texture;
# C1 D# a' J. W( |4 ^5 | - let g = t.graphics;1 X8 E& ^- d* ^4 ?
- state.running = true;( b3 b2 u! c- H* f) Y) Q, t
- let fps = 24;7 b1 H' B/ k+ Q% e0 ?
- da(g);//绘制底图6 s! P# j/ G6 h2 h9 N& G, ?
- t.upload();
3 n* Y# g5 F* s% `0 q( ^ - let k = 0;
* p. \, |/ z! u" [; T - let ti = Date.now();
a+ {" h( t D - let rt = 0;
% C: @; ], L. X& R - smooth = (k, v) => {// 平滑变化1 R/ Z+ ?3 _. y; N& i. L# T1 m
- if (v > k) return k;
* i" ^2 ]' d0 c* R) h3 O/ \ - if (k < 0) return 0;- g9 k* g) ^$ _1 j
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;- I1 }! }# E# @) z
- }# a, \4 g# b7 J
- run = () => {// 新线程
7 N, Y# x4 F. w( Y! ]& x M8 @( U% u8 Z - let id = Thread.currentThread().getId();
) p" b* k. i5 ]; k+ P! `# l4 j - print("Thread start:" + id);
2 F! j& @, s: H1 ^ E - while (state.running) {/ _* X$ M. C* g, O( N. W( I
- try {; V& {5 F3 [, r
- k += (Date.now() - ti) / 1000 * 0.2;- s+ {2 ~ B3 H0 v
- ti = Date.now();
+ V" a- Q' G6 i) @ - if (k > 1.5) {
! c- V& ~& c- ^ s - k = 0;2 W0 v, g6 ^3 ^3 @5 H
- }
4 U; w* E! l: } - setComp(g, 1);
% N/ a' J8 H; v" b( t- _$ h( P \ - da(g);
( D7 m: M' A! K3 Z+ P! u |* x5 Z$ B( m - let kk = smooth(1, k);//平滑切换透明度/ b( p4 N0 | O: ^4 Y' B
- setComp(g, kk);
. z9 v" O/ S4 [2 c - db(g);+ Q* j+ T0 F; i! j' Y
- t.upload();
6 D. }* C* \3 L1 p - ctx.setDebugInfo("rt" ,Date.now() - ti);& u: L) G3 r- X0 Q a; L6 y
- ctx.setDebugInfo("k", k);% p+ z+ t. d0 s: Z3 b/ g
- ctx.setDebugInfo("sm", kk);+ X2 x1 Q$ H6 j" H
- rt = Date.now() - ti;
6 z, c& ]" W0 H. s: z - Thread.sleep(ck(rt - 1000 / fps));5 X" U% n0 J+ {4 S& ^/ Q, h
- ctx.setDebugInfo("error", 0)
/ i0 D3 K0 F6 h, t5 P. J - } catch (e) {; V0 o* o. h6 m0 s
- ctx.setDebugInfo("error", e);& f' W0 q2 X4 h5 g; N" B Z
- }+ f7 E* _$ o z5 `% P
- }
) _0 Y* g9 q" O. v9 k - print("Thread end:" + id);
1 ?9 O$ e: T; _3 F# N0 ~2 r - }
% `7 M' v1 W, G' p9 U4 \2 Z+ G - let th = new Thread(run, "qiehuan");
) ]! y/ s8 s9 v# |$ V" I$ u - th.start();
! L! e! }" i% S4 V5 M, V - }
$ [: a& S. |/ C' e0 I+ G# z. }4 p
" O0 k2 g" h% \$ {" \- function render(ctx, state, entity) {
* J. g# Q t/ M' ?+ L$ n( s3 N" e - state.f.tick();
* j9 V- b7 Z! U: n - }
5 |, z$ f* Z& F: R" L
6 b' o' x4 d- e" \7 K- function dispose(ctx, state, entity) {
& F r" ?! m% N4 O( b$ } - print("Dispose");
0 n8 N- \7 w9 M) {& r0 X - state.running = false;
& g/ H4 y; d$ K* J - state.f.close();2 S& Y: W+ f& B! ], ~
- }* c$ p% O4 o3 W# O
1 g6 e2 S! U0 n6 G+ W* }4 ~6 l- function setComp(g, value) {
8 a! i7 H4 _, i! w* d2 ]- }6 J7 H8 E& I - g.setComposite(AlphaComposite.SrcOver.derive(value));! a4 W9 u) v+ [! Q0 H
- }
复制代码
/ ~9 G) t: }3 d2 U' [( C$ w; z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。
0 z: a* c1 p" B7 ?* ?% f" c2 ?4 Y( Z& R. {% v* ^ m' X
- L$ S b# q0 y9 t- P+ M% h: L7 e% J顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)( U0 s- P3 j" I5 I. T
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