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7 \/ C+ `5 [1 H- Q: K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。, e8 ]2 D8 e9 Q
- importPackage (java.lang);
2 J% l+ o* { K" i - importPackage (java.awt);2 W+ s$ u' x# K( X5 N3 j
" h: I6 a) S$ M$ Y- include(Resources.id("mtrsteamloco:library/code/face.js"));
# {- Y4 k d5 l; s; V
. X! o/ }4 c" j! T0 e" ?3 ~& x- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);* O9 ^3 t V5 d1 M( T( D
- : Q1 h- T! C% Y4 V/ n
- function getW(str, font) {( p, ]4 V5 d0 k# Q" K3 l. D
- let frc = Resources.getFontRenderContext();
5 f, e; K$ t9 _, r5 b - bounds = font.getStringBounds(str, frc);
- S2 L6 m7 D+ w5 g - return Math.ceil(bounds.getWidth());
! T4 X1 k# {" H8 U+ m7 ? - }5 [9 }; _* A! c
3 ?! X/ `' ^/ U) Q% N- da = (g) => {//底图绘制
* f: O, w8 \. V, j - g.setColor(Color.BLACK);
5 v) |/ f8 N, E& s- c$ W" _ - g.fillRect(0, 0, 400, 400);
3 e2 q% e5 K0 j - }
6 [; J. n; ]5 x3 }9 l - # q3 s7 \4 b, Z9 @& z0 g
- db = (g) => {//上层绘制
& g2 g3 {$ l& r: n, H - g.setColor(Color.WHITE);
) ~- L" P3 @: @" ?4 h, K) ^) J% k. R - g.fillRect(0, 0, 400, 400);
0 L% I2 U/ f3 S5 ?+ s7 H% @ - g.setColor(Color.RED);
' R1 B7 R- @" {" y/ R+ ^ q - g.setFont(font0);
& v+ f) T1 a- [+ k - let str = "晴纱是男娘";
( X S. c( N- G B) c - let ww = 400;
! T% ]0 \' m. n5 P - let w = getW(str, font0);! X- q8 G' D! x$ D
- g.drawString(str, ww / 2 - w / 2, 200);
. o; m- d; \5 F4 F# l - }8 S/ S& }; D6 d$ _ T- `% ~6 @# b% O
- $ p0 ~. b, x/ i$ C! a* Y
- const mat = new Matrices();
4 X2 R* p9 {. ]9 ?$ k; S - mat.translate(0, 0.5, 0);
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6 w1 I' A% J2 |. o& P5 R% o! j- function create(ctx, state, entity) {! ]( y& o# v! c+ b! b/ |1 X4 x8 a
- let info = {- }5 F( q" ^8 O6 S7 e8 S j, `' H% J
- ctx: ctx,9 z) {! t; d0 u) D
- isTrain: false,
; }8 A/ J* b- f L1 e- J - matrices: [mat],
! {' s; a: n& W# U, A1 g9 _- \ - texture: [400, 400],
: Z" n% _1 _2 b0 f% G' o - model: {
9 Y4 Y( E. f0 }/ e8 p7 O - renderType: "light",
) }2 f2 G7 |* n- p4 ^ - size: [1, 1],- f/ b2 a6 R) d5 c1 D1 g1 S
- uvSize: [1, 1]
( O2 G- t+ D/ J9 k - }
. O+ V. O) T7 j- W - }* V1 L# }! h" ]9 M" z5 d5 H* }
- let f = new Face(info);
0 g( A6 k1 ]6 g3 b8 i. \8 l9 p - state.f = f;
- E% U& `" E# I; A9 F l
6 R: V& p# d! f: J$ r0 J$ j" e- let t = f.texture;( x n7 V5 c2 D, y
- let g = t.graphics;
8 Y8 P) G' G" Z. U* R# h- u - state.running = true;
" B- J7 p4 A2 x' V - let fps = 24;
" Q% J, O7 k0 D% g7 p! G8 @ - da(g);//绘制底图4 H' y5 w2 e, ?. a( e, F: a6 j
- t.upload();
- f, s& [) p( S6 w5 I5 X# e - let k = 0;
/ |. T, M8 y: Y& V1 F% | - let ti = Date.now();# u4 B7 S9 Q& K; g5 A: T
- let rt = 0;
! d i6 g' H) j- i a0 B& a - smooth = (k, v) => {// 平滑变化
5 }/ g, t4 s/ ], p( W/ X - if (v > k) return k;
, Q0 h' X' ]8 W - if (k < 0) return 0;
' c# d W0 Z+ n/ y3 P2 G/ j - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;2 J E' q1 A; P* [
- }
5 S# w3 w( V6 ?- W7 ~* S - run = () => {// 新线程( K2 P) H1 h- }8 }
- let id = Thread.currentThread().getId();9 D; S' P2 s0 v" a
- print("Thread start:" + id);. z! }$ l H9 m$ A. S' n
- while (state.running) {
' X& {* O! o0 L2 \% P4 B - try {
- m# ~* {3 p& ]# a" R0 f2 h - k += (Date.now() - ti) / 1000 * 0.2;( \, |6 w ?+ Z; A8 S
- ti = Date.now();
4 t( B3 t" ? H( i. c6 \. t$ k - if (k > 1.5) {
1 C( i' k. G1 u g& t- t: T5 | - k = 0;
$ o8 D" k a# Q+ { - }" @0 ?! O( W7 r- {9 v
- setComp(g, 1);
/ H$ l% _0 e: r+ k - da(g);
+ J# h8 B! J1 h! z" b. z - let kk = smooth(1, k);//平滑切换透明度6 }5 N+ J* f# b7 b! @3 H: g- W+ l
- setComp(g, kk);" \0 g7 K6 \, ^! N
- db(g);$ x* n( D. E! q: O ~
- t.upload();6 L5 }' i; D3 c" O Z! \
- ctx.setDebugInfo("rt" ,Date.now() - ti);4 ]8 L6 `7 g( P
- ctx.setDebugInfo("k", k);' e! M8 `; T! E* X( N! V+ x
- ctx.setDebugInfo("sm", kk);
& o, `2 F; t) d1 F% g - rt = Date.now() - ti;7 u% G* ~1 |! _. d
- Thread.sleep(ck(rt - 1000 / fps));4 V v# f% N/ V, n8 w! r1 Y
- ctx.setDebugInfo("error", 0)
' R! @! M$ ^. f5 J - } catch (e) { r! p6 k2 G ]! y* r3 N
- ctx.setDebugInfo("error", e);
& ?, S2 i' y; f: t( l `! m - }
. M# K8 D/ i8 Z" P, B5 u3 p" ]) o - }
* `( t& V" e7 c2 Q1 U( R+ f: E# z* A; | - print("Thread end:" + id);
t! l2 V9 w( O6 m$ W" S - }; ]2 Y$ s9 N$ ~/ ]
- let th = new Thread(run, "qiehuan");' |# q1 s, K7 s
- th.start();
* j( v) z6 m9 E5 s9 w+ p/ P - }
1 n" ^0 L! O! \$ P- t# T - * e& i3 g; x. y" W' Y& @( `
- function render(ctx, state, entity) {! w/ u( S9 K2 Q6 i+ V
- state.f.tick();7 @8 k; L9 V! [5 p# W+ E1 I0 E' R
- }
E% C1 C5 g# h) ~ T" E, Z/ z
4 ~+ ]# ]8 w6 F9 x% q0 K- function dispose(ctx, state, entity) {" w) y' ]5 Z8 b5 ^/ t
- print("Dispose");
$ Y2 {2 s; ] i) Q - state.running = false;1 y0 j! a) R( F4 d2 Y) n( F
- state.f.close();
+ `0 d% X1 E1 j) i8 N# c {/ N4 c1 m - }
2 e" K r: | x# u& m
8 i4 k; W5 ~, c- E, Z S& Y- function setComp(g, value) {
+ ]8 B" J. d+ l7 ]% f% { - g.setComposite(AlphaComposite.SrcOver.derive(value));/ \2 }; _5 i! k* u
- }
复制代码 , l2 J, ]7 a- {1 @+ s, H* @, W e
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。2 a6 \( c4 G& P, c$ f$ d9 p3 r' i. z
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' O) I& o( {. q7 n6 {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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