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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。- L/ O# l1 }! j0 O/ Q% m" Z0 b
- importPackage (java.lang);+ j9 t9 u8 T) \0 u1 s3 t* b U
- importPackage (java.awt);9 D8 j. X1 }& K( b' l# q
- 9 p+ C8 V6 d, z
- include(Resources.id("mtrsteamloco:library/code/face.js"));3 J+ D5 G0 j* [9 D1 B4 g3 e
- 0 f# H7 Z8 V, s; Q0 g
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
?) R: v, s$ ^: z - 4 E) _1 d2 s, H& ~- g/ {1 K# X: V" `
- function getW(str, font) {
2 s$ ~4 e$ m, M/ r - let frc = Resources.getFontRenderContext();
' g1 b) M) R& l - bounds = font.getStringBounds(str, frc);
0 s/ ?, R# P) x/ N" L s2 o - return Math.ceil(bounds.getWidth());
% ^, h% `7 T; c- U - }
8 y; T7 `, Z5 H4 G9 Q
0 U/ ~% m5 y! M( {; Y- da = (g) => {//底图绘制
0 j* E5 ]( v6 y/ C. c - g.setColor(Color.BLACK);0 n% W$ U5 L/ u7 `- @) Y
- g.fillRect(0, 0, 400, 400);/ N; k% H: J5 A: |' K
- }
+ K5 D) f/ H# X. L! b - ) J/ Y$ ~! h% @2 L4 G
- db = (g) => {//上层绘制
4 P4 b6 o! _, J# I7 | - g.setColor(Color.WHITE);* P1 `; h3 N7 Z, [
- g.fillRect(0, 0, 400, 400);
5 ]! ]7 |- O8 ~. y3 [. Z+ k; j7 ~ - g.setColor(Color.RED);
: m3 k% R/ S; @; }) d |# N: | - g.setFont(font0);. g3 V5 H) x3 n. T) L- S
- let str = "晴纱是男娘";& n7 p# W7 t4 S* i$ L4 I$ ~2 z
- let ww = 400;4 I$ o) |% E* w* w
- let w = getW(str, font0);
$ n4 H) H' w+ O - g.drawString(str, ww / 2 - w / 2, 200);; i1 S s, r! B
- }7 L1 j) Q$ W% f$ H8 g8 _2 z6 R
4 ?1 D' B7 X, V4 D) i$ X8 }- const mat = new Matrices();
1 i$ D" Q+ @" t! _0 q - mat.translate(0, 0.5, 0);0 d6 e% \2 _# ? U
- " t5 X5 y7 i/ L& N/ ]$ m
- function create(ctx, state, entity) {6 |) P& u: L8 A4 A, C
- let info = {/ ~, ] I( [. k7 Q1 J5 M* l" J; R
- ctx: ctx,( B( [: M4 G! Y0 e8 h9 X1 N# `
- isTrain: false,
2 w& p. ^+ N$ ` - matrices: [mat],: ]& l& u8 @9 n7 f1 q
- texture: [400, 400],/ ~' ?* e; I2 g
- model: {7 [& }$ N* R; @* ?
- renderType: "light",
" E9 |" t. @3 u! @ - size: [1, 1],
* W D( _. m ] - uvSize: [1, 1]9 J: X$ n2 m% h! z& C5 \
- }% l+ u" N0 k6 M8 N2 Y
- }5 b7 ~: w) h3 v6 M k8 k; x
- let f = new Face(info);
4 y& \( }9 T2 P' L8 M0 z% p+ a - state.f = f;! _( h& v, D9 F' }; j. C4 ~8 o" I
; H. c; B( V. J, ~' Y- b- let t = f.texture;/ A: J. r2 v# P
- let g = t.graphics;3 k% [ K0 w$ s: ~; k/ n% w H
- state.running = true;
! b B; o# Y9 p% g! o& o - let fps = 24;1 H: g. G' j0 ]" c% k0 l
- da(g);//绘制底图. H7 ^0 }- T% ^! \0 g
- t.upload();# w6 U A+ `7 Y+ x7 ^
- let k = 0;
: f+ o! y2 J3 U' u6 O5 Z - let ti = Date.now();0 X* l8 j+ X/ w. t
- let rt = 0;
& d$ ^2 F; l: Q9 T+ C8 p8 b - smooth = (k, v) => {// 平滑变化
$ k$ {6 u \" t! k: j& g$ ^ - if (v > k) return k;
6 }1 o- `$ T$ `! m& b4 @+ K - if (k < 0) return 0;
0 k9 ^9 T* L' r1 A% e! N - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;6 t9 p" k- v. K, M
- }
) V3 T% p$ i+ t% h - run = () => {// 新线程
# B/ `, p2 B) R - let id = Thread.currentThread().getId();
4 d, \8 U% @5 s - print("Thread start:" + id);
: x" {5 C# w- ]+ _ - while (state.running) {
- s0 |4 E. N5 c/ _ - try {; s2 ^6 \ W" t5 c
- k += (Date.now() - ti) / 1000 * 0.2;* {+ g( R9 y5 U j8 q
- ti = Date.now();, K4 D' e3 h5 b) s2 B: d
- if (k > 1.5) {
# h: T' ^9 X: @* Y- L+ J - k = 0;
7 W0 b1 E( J" D+ W8 e5 _8 p' f R - }
( _7 K& B; V8 y5 D$ C) E1 }' ~ - setComp(g, 1);
( k* \ i' D7 \2 j4 e' r+ L - da(g);
3 t" [: I3 _) ?8 o' x - let kk = smooth(1, k);//平滑切换透明度
$ V7 r/ {# \, ]( E9 _7 M, s- U3 N& L - setComp(g, kk);
5 O2 \3 E( f/ G: r% E+ u0 C I8 u" v - db(g);
/ j& b' T" g/ s+ r; r - t.upload(); _* T# E7 C1 }; W# g. u7 B2 \
- ctx.setDebugInfo("rt" ,Date.now() - ti);
: X9 |# i8 ~5 X0 p) b! T! @ - ctx.setDebugInfo("k", k); v0 u" B% z! |# G9 j. d
- ctx.setDebugInfo("sm", kk);4 q7 m% q# G' L" |( g7 g& j8 {( C
- rt = Date.now() - ti;
1 S. }) \2 V6 q4 l5 o' s: t - Thread.sleep(ck(rt - 1000 / fps)); m3 P4 l' y4 i7 Q5 R. v: L
- ctx.setDebugInfo("error", 0); H$ s4 S+ y( O9 H2 N9 |0 ^- o; D
- } catch (e) {/ _# y5 r, Q) K0 K1 O- G% X. o
- ctx.setDebugInfo("error", e);; I/ ^4 Q) h, {( V! o! ^
- }9 h* p: d- R V" A7 [8 l) C6 H
- }7 h% l6 U# f: @
- print("Thread end:" + id);' k) B6 L+ |( W" V% g6 F {
- }
# V9 b9 n; a4 E# s/ G; ` - let th = new Thread(run, "qiehuan"); Z# d! D# Z2 ~/ h
- th.start();) v% d; L$ _2 N7 x, p) B' I
- }
* W# i5 O9 _) P$ D
( C! Y8 n; u+ T5 z- function render(ctx, state, entity) {" e6 h7 Y4 f5 h b
- state.f.tick();
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- 9 Q4 ?. r7 f y# |4 ~" f
- function dispose(ctx, state, entity) {
6 s- ~8 z+ N* y - print("Dispose");
' K" j0 Y* L, K" t# [ - state.running = false;* F3 r" E$ Z/ i+ Z4 M2 e1 |
- state.f.close();
% ^. x1 Z' u' P2 u8 O - }
7 f! A, R" Q3 V9 O3 w - 1 W0 {( Q% o5 m4 e! G
- function setComp(g, value) {9 k, [ y# X+ m- y6 t
- g.setComposite(AlphaComposite.SrcOver.derive(value));
. b* ^7 u& _4 Z8 H - }
复制代码 5 }3 C3 V% }; L, D9 g0 l
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。# l6 d3 A* v* N& q
4 ^- t9 Y& j8 B7 _. Q9 l& b
6 g8 l' W$ ^6 o" ~) h6 v; p! I顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)3 r# E d6 U9 b- `$ W* S! |( d, E2 C
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