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4 ~1 `4 X8 @/ i$ O5 a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。' H: c6 a: ^; i3 f3 B$ N9 }; ]
- importPackage (java.lang);
' G1 k# d1 O5 c7 G8 v - importPackage (java.awt);* z+ O) m$ ^, S% S' X' q+ t) W: M: m
- ) n* |" X( Q: E8 d, g
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);& j/ M) _ L" @# x6 m
- n0 W1 _- |4 S+ Y$ a5 O7 Q# V- function getW(str, font) {8 h: E# }& ~- h+ K
- let frc = Resources.getFontRenderContext();
: Y" _; m+ G0 y6 R4 I* r' p - bounds = font.getStringBounds(str, frc);
- a1 C; R, y( Q0 o0 C4 L# P8 r - return Math.ceil(bounds.getWidth()); y8 z2 g$ Q* U
- }
& r* |; N4 S' E! D/ k- N1 ^
: z& n8 p S- T" G! l1 z- da = (g) => {//底图绘制" v( J2 h# e5 _7 y! n' n
- g.setColor(Color.BLACK);' s# i( |7 S2 _. v) j, z
- g.fillRect(0, 0, 400, 400);& C9 c# W9 I4 n2 M* J
- }
! W7 |/ T5 Y3 R: B6 E
. F9 H% N( N8 T9 H& \% `) c- db = (g) => {//上层绘制
3 C! E2 U& B- q - g.setColor(Color.WHITE);
+ j2 {; Z' s/ J: m6 {; H - g.fillRect(0, 0, 400, 400);: P3 [* `+ ?8 J$ P8 q. T& \5 N- d) F
- g.setColor(Color.RED);
% ?* e0 ]% [, Y7 I/ e* s% Z - g.setFont(font0);
- j4 Y# T. I4 `; I( E - let str = "晴纱是男娘";
% S$ @0 j6 x: t* [' p# p% X @ - let ww = 400; b- {- X; D/ j# T7 c- L h
- let w = getW(str, font0);4 C* x1 ?* F. l7 M, L0 b8 Y! |
- g.drawString(str, ww / 2 - w / 2, 200);# f" s* M& l% t4 w+ W
- }+ q# l" V/ C4 M/ I% D
" A0 ~9 i5 _" m( m0 t8 Q& g% [- const mat = new Matrices();7 E3 X& z. ]6 F7 H
- mat.translate(0, 0.5, 0);5 m C, {! M Q# A- }, b1 A+ K
" o( i* V5 N: v$ X0 @- function create(ctx, state, entity) {
) J- A) ]# D) U3 Z4 p+ U - let info = {# r' R9 E c. P$ [" w# @' O
- ctx: ctx,/ ? W _' Y) p
- isTrain: false,; V2 |) G0 B, ~2 i& y7 ~3 L* }
- matrices: [mat],# z L- J1 k* }; n0 [1 t) }
- texture: [400, 400],
) h3 o# k2 s: `2 ^5 b - model: {- R1 I9 \' G R- h" d6 O/ F) X
- renderType: "light",
+ G. x4 \! E8 H0 P4 E) V - size: [1, 1],
$ W) d; O; p' ?9 Q$ _ - uvSize: [1, 1]
0 K6 T" u6 X6 N0 ]) K4 r2 p" ^ - }) \& s2 {5 |9 u: G3 q5 i+ z9 o4 r+ S d
- }/ ]; F- _6 K- Q3 j" P/ i
- let f = new Face(info);. Z* r8 x9 B7 {2 Y% `9 f# q
- state.f = f;
+ @: o r2 U: W" l d* e* |6 _ - " v$ s0 R) e; `$ f/ m
- let t = f.texture;: s" _! P* r; `- ^! Y- r
- let g = t.graphics;8 [! ^- n5 f Y1 B
- state.running = true;9 d9 b; r K; I2 ^- V! H1 b- w5 h
- let fps = 24;
6 j, [3 b2 ]' E" I) G - da(g);//绘制底图
& u, o- O% i9 |0 a' K - t.upload();- }" `% T" i7 O& X2 z' b
- let k = 0;
' ?6 Y" P- y' ^' G: @ - let ti = Date.now();( J: `. e/ ^3 s l
- let rt = 0;+ X4 ?) {; f5 a6 z$ M
- smooth = (k, v) => {// 平滑变化" a6 V! e& Z3 R! X" V7 s9 R
- if (v > k) return k;
0 B! b' C; y* v% b - if (k < 0) return 0;
; }( S4 ~+ x; {, R. K3 j! Q - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
- i5 ?/ v" ^. A# e- k' v$ V - }" P& s4 u" q& P4 F. W% a N
- run = () => {// 新线程
" P9 H) Q% W7 ~ - let id = Thread.currentThread().getId();" B7 i' W* c# n
- print("Thread start:" + id);
% y& [0 T6 d+ D0 q- t, ~4 F - while (state.running) {
0 }8 A/ ~1 S1 B - try {3 \. E8 O% s7 I! {# S
- k += (Date.now() - ti) / 1000 * 0.2;
0 \& G! @7 k0 @ - ti = Date.now();
! R; Y* f, h4 F0 C& A" }2 A. u) Z; a1 w - if (k > 1.5) {1 D# d) b) {$ h
- k = 0;0 h8 O9 o- m; @/ [. l' r" I6 i( ]
- }
* Y5 w3 x( r7 H% v - setComp(g, 1);& M' ]8 k4 x3 J0 m: d
- da(g);
C) Z1 ` M0 M" T( @3 P - let kk = smooth(1, k);//平滑切换透明度4 X- W$ H8 ~+ k5 q# P
- setComp(g, kk);
9 a5 l) |! j3 D1 ~7 u% f; O - db(g);
9 V5 D- b: Z* X3 b5 e; [ - t.upload();5 z( z; P) C' p) c3 o6 K1 S6 r
- ctx.setDebugInfo("rt" ,Date.now() - ti);
' M& r, [% \3 I( z - ctx.setDebugInfo("k", k);
6 j2 M3 q+ \+ G4 \9 P" e - ctx.setDebugInfo("sm", kk);+ V+ g+ ?$ m5 n9 }% B6 }4 K
- rt = Date.now() - ti;0 t7 Y2 R$ o+ b8 w6 i5 R
- Thread.sleep(ck(rt - 1000 / fps));1 V1 ^1 r2 |3 ~
- ctx.setDebugInfo("error", 0)% o$ k9 J6 h4 x; o; `; z
- } catch (e) {
1 v, \ h: l$ Y+ D; H) Z% d - ctx.setDebugInfo("error", e);
) `- K' y% n3 b3 [3 x - }1 R% o0 O0 \4 j1 b) o; U U5 f
- }
$ C- w! a# ~8 _2 }1 ^9 ^# E - print("Thread end:" + id);0 e# r* Q, ~; h# r" T/ V( a" D
- }7 x! M. u( E! k
- let th = new Thread(run, "qiehuan");5 k8 |# Y! `* N* x% e& h5 l
- th.start();
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- * g8 v: u5 Q9 }/ p5 l
- function render(ctx, state, entity) {. u" v Y3 C, s; U1 q: Y7 N
- state.f.tick();% ~! G: `- _0 m3 Z% G: w4 F* t
- }
# X) N, U7 a8 Y8 [# z9 Z - 3 D( ?! K' j8 t, |" s/ Q1 b
- function dispose(ctx, state, entity) {
/ _4 {* ~. ~* a- O, G - print("Dispose");" i: e* Z! B1 R' G
- state.running = false;
) e% d+ t2 F/ `; R6 l* T - state.f.close();
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- : D) z0 l7 u0 y" Y5 R/ V, g9 i
- function setComp(g, value) {! I8 p6 N2 D, s+ j
- g.setComposite(AlphaComposite.SrcOver.derive(value));, M: r& z& }3 N
- }
复制代码 ( {) l# L& i! P
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 _" }* M# Y+ Q3 T- j
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# _! [: j3 P7 y' K1 e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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