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u$ j& l9 ?2 ?8 J Q5 y( a1 a; B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。
d" \8 n8 r4 U5 i% n' K- importPackage (java.lang);' c5 d3 \6 f6 M" E1 N" d
- importPackage (java.awt);/ \" c2 ^, w& ^7 }% x
- 7 y! h0 H/ o, {( P7 b' _
- include(Resources.id("mtrsteamloco:library/code/face.js"));
3 w$ y9 _! w( r. Y* Q6 R8 x
: H3 `2 K, K+ Z1 I9 u6 ~3 T0 [- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
4 C, @2 q9 {' b& L
( M1 I+ v" H8 U# J% y3 D1 \/ b+ m0 p- function getW(str, font) {$ K4 T& k( b5 d: ]$ q9 F
- let frc = Resources.getFontRenderContext();5 w' t8 C* g7 X z& y7 u( w
- bounds = font.getStringBounds(str, frc);
$ |5 D6 U' b3 z2 `1 m - return Math.ceil(bounds.getWidth());- T3 n( n0 H, d
- }5 _& ^& l9 j' o# `
- ! W4 I3 B; W' n5 Z# c4 f
- da = (g) => {//底图绘制' N8 B o* P- G* v5 K; h
- g.setColor(Color.BLACK);
* _: o: G T8 k$ {7 u3 z - g.fillRect(0, 0, 400, 400);9 R" T1 f# z6 R8 \% @8 A1 ]
- }
) ^9 v# G% T0 |* P) ^! l; c$ _ - 0 o9 Y _# q+ x7 D% v K1 J4 {
- db = (g) => {//上层绘制
, R$ h; L8 s h2 Y, b: p - g.setColor(Color.WHITE);/ H2 S0 D) U! E1 h; O: o
- g.fillRect(0, 0, 400, 400);4 r6 o/ W: L9 P
- g.setColor(Color.RED);
4 ^" r6 n* J k- }7 ` - g.setFont(font0);) S+ Z V! X( h" c4 s/ k0 B \7 p
- let str = "晴纱是男娘";0 f t5 S, O1 B" I* o
- let ww = 400;/ x3 c" l! T$ ~, Y
- let w = getW(str, font0);
$ r; E: j0 \5 x/ f. w# ?% O. Q+ n - g.drawString(str, ww / 2 - w / 2, 200);
- p. @" C! v! B5 L - }, m u/ m1 E% y9 Z/ b, m
! m! t7 l8 v( p7 R- const mat = new Matrices();5 q4 j$ A3 T" N
- mat.translate(0, 0.5, 0);
M+ F2 M/ o* |& P. X
3 `) s* c7 `. V- function create(ctx, state, entity) {
3 i& i2 d6 _; U, ]* T4 D, N* B - let info = {
% ~0 Z! g+ ]' I* J# d - ctx: ctx,6 y4 M$ M: |0 Q8 X1 Q$ I& b9 I P* u
- isTrain: false,9 V# p) M1 U$ u# U0 T4 U) T
- matrices: [mat],6 l' p% P6 m' c
- texture: [400, 400],
, H; k5 z6 D2 B6 J! F# ^ - model: {
5 A) ?* ~, M b- ] - renderType: "light",) k2 } `: Z0 F$ J5 Y/ y8 _
- size: [1, 1],1 P6 Q- Z$ B$ \, ^: q
- uvSize: [1, 1]+ Q$ v- h4 L! W: |
- }
& `1 @* n: B+ \3 E" |5 Q" A - }
- L9 r$ W/ P: C5 S k: Y - let f = new Face(info);
8 X% w0 U9 f. E$ Q- ]0 s8 [# {( A0 c - state.f = f;3 [% p+ |$ ^% ?
- 5 U5 ^& m% m, x
- let t = f.texture;) i& ~# {/ |/ F4 W+ Z
- let g = t.graphics;- `4 r2 ?6 s- e
- state.running = true;4 T7 Y0 M0 ~8 L) }- e) o
- let fps = 24;
p: ]' t$ e+ n5 m9 ~' ^9 S8 G - da(g);//绘制底图; U/ Y- J) m! [7 n; p$ r7 }
- t.upload();
& `1 ], v$ h; B$ P- @+ f0 \ - let k = 0;" q( E6 G- ~8 t( z1 R" y
- let ti = Date.now();
3 R% X; G% A# y4 u" w) A - let rt = 0;5 k8 u( y; V6 F4 T+ d
- smooth = (k, v) => {// 平滑变化
8 E# E) `; [4 i- u+ Q - if (v > k) return k;) @0 T* n' R4 K
- if (k < 0) return 0;- h( _" \: e& l v7 x2 _
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 Z' p0 c7 J. v0 N0 z; `5 H6 E/ Q
- }3 |' ]4 V; e& h( v( K; E P. a
- run = () => {// 新线程
9 K; W2 c& l$ @5 J( c - let id = Thread.currentThread().getId();, U& o" l. v& h
- print("Thread start:" + id);
7 ^0 O" L. A7 x9 h1 f - while (state.running) {
# Q" ]. b W" k2 V, {$ F - try {" B. i% P: C! y+ l6 D* _# o
- k += (Date.now() - ti) / 1000 * 0.2;
2 S, O% }" D/ E; F5 X - ti = Date.now();
9 x' H" H4 k# ~: y1 a - if (k > 1.5) {+ H! L' l+ i+ N) t
- k = 0;
& R8 Y7 d( v6 m9 B - }
# z( w* W8 A7 n0 x; } - setComp(g, 1);
0 r+ X' P' W" y% i1 X - da(g);. X8 g' M# I! c; S1 r+ q% O9 a9 k' e
- let kk = smooth(1, k);//平滑切换透明度: \6 ?2 E( C" `% ]% h
- setComp(g, kk);
+ D( W% G3 S. A* }% K - db(g);
2 z) j! P* I ]4 d: {! l - t.upload();: @' J% s2 _+ ^
- ctx.setDebugInfo("rt" ,Date.now() - ti);
( y+ P `7 | A& s - ctx.setDebugInfo("k", k);% R$ A9 H' }( f0 V; `' ]: }
- ctx.setDebugInfo("sm", kk);
* P2 I$ { C& k$ V4 }3 t; z - rt = Date.now() - ti;
4 D1 j+ b2 W8 B - Thread.sleep(ck(rt - 1000 / fps));
+ ]. w( |6 m4 H - ctx.setDebugInfo("error", 0)8 E- [0 Z$ o( j, t d; f+ M$ l
- } catch (e) {% ^, T+ e# A! C0 t r- S) B2 i
- ctx.setDebugInfo("error", e);
, b' q( a* S, A8 u C! A; G( B - }
8 D/ j+ Z6 W* I8 W4 }, P9 B - }
0 Q L' i8 }6 M' k - print("Thread end:" + id);2 m+ }; @7 ~% f/ Y8 }/ q
- }' V# s0 @8 s* c% L9 P- x
- let th = new Thread(run, "qiehuan");0 N* P6 [. m# H6 C9 t: c: n8 [, U
- th.start();% }/ ~7 F# s* S7 T& X7 P/ @3 {
- }
; D8 @2 J6 U2 p( ?, G7 B: s% U
" D: J9 a) g# `, b* J/ H5 z- function render(ctx, state, entity) {8 U" {) C- }3 i! B1 ^1 X
- state.f.tick();
1 H1 G& ]- Z, s# N - }& h1 Y' f7 \8 [* c: X0 |
- . r0 E/ b( c& }; X
- function dispose(ctx, state, entity) {
0 O3 D9 T C9 ^& ? - print("Dispose");
4 k: y/ H @5 d - state.running = false;
/ }; j# x4 b, U+ z5 Q - state.f.close();
+ z/ R0 P+ f5 v - }
& d. n* N/ {2 C; b7 s8 @ - ) J$ M$ O$ C% t. v, H/ D l
- function setComp(g, value) {/ m8 ?7 ?: l- g. k
- g.setComposite(AlphaComposite.SrcOver.derive(value));
2 V1 \ ~ V K9 z6 e: P. d- {' r - }
复制代码
N, u; X. A4 f9 {7 G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。
% u. t _# t) m8 N0 i" a7 S3 Y% }6 G4 c% r
/ ?. k& Q' L% F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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