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% F9 U" I6 ~5 t: F; \) j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 f) E& k' O4 r( B6 `- importPackage (java.lang);
7 @% r9 u0 n, S; D5 W - importPackage (java.awt);( e- M& h! D, b$ |3 s6 |
( ]- C4 p7 Z! b( c0 l8 x- include(Resources.id("mtrsteamloco:library/code/face.js"));
/ I. F i) ?1 J( B x; } - 2 g. N9 C/ H5 D# r/ H, [( |. t
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);# E f- R+ h$ m( R x2 A+ C4 C
- 2 U# ?5 t+ I2 V
- function getW(str, font) {+ e( y/ q3 P% x' z7 U1 I/ Z
- let frc = Resources.getFontRenderContext();
2 K: j) f$ [. I - bounds = font.getStringBounds(str, frc);
$ }, m6 y ^; [5 U7 w- ], ] - return Math.ceil(bounds.getWidth());
4 i: G" J' Y& n2 }3 i1 S% v - }* O, ?( `+ ~* {5 ]8 C
- ! z" o, h7 B0 v1 H2 I7 Y; k
- da = (g) => {//底图绘制
' M$ [; |0 I3 L4 G - g.setColor(Color.BLACK);& O. C& J+ v4 A+ l; U1 j) \
- g.fillRect(0, 0, 400, 400);4 o: u+ F8 |; b7 S# v0 f8 ]
- }3 v: N* g U7 g% Y( d9 u7 p! V7 U
- 3 P( }! G$ e+ y% u
- db = (g) => {//上层绘制2 O/ S9 O9 R1 t
- g.setColor(Color.WHITE);
" F2 Y3 U: F; H. C! C; r - g.fillRect(0, 0, 400, 400);5 y' `4 u$ |) i9 K" H0 {0 n! Q6 m
- g.setColor(Color.RED);
" Q% f0 }* m; Q9 }3 T0 m: K - g.setFont(font0);! y- q8 R- {; S/ F6 ^4 v y) W9 C
- let str = "晴纱是男娘";! B+ ^: {5 O% j# m4 z) w) g) h9 D
- let ww = 400;
& K+ _+ P, a/ p - let w = getW(str, font0);
9 c, L# x# y7 O - g.drawString(str, ww / 2 - w / 2, 200);- d6 J' \) @& ^* ]; m
- }% A, c8 `! {* W ^$ e5 y
# g4 T- R T6 R* J' s' a- const mat = new Matrices();- g/ L- P' l; u
- mat.translate(0, 0.5, 0);
- N+ _% j' E8 ]5 Q" F1 r0 T - 2 G. K- M: _+ N! i' t
- function create(ctx, state, entity) {
) I+ T1 o& C1 A( y( E - let info = {
. _3 l) C5 F9 \' o8 B! \ - ctx: ctx,
/ P4 `( j) {- {. n# m2 s' w1 \ - isTrain: false,
0 f c1 B) B0 ~: a% G - matrices: [mat],
" x3 V' U3 f& N - texture: [400, 400],
# m; P! S0 ~" @9 k, v4 B/ ` - model: {
; ^- c5 \6 u K3 o7 ?0 y - renderType: "light",
. S) b' ]( Z; W, g2 r2 i( F - size: [1, 1],$ j6 @) [1 c! F6 G4 r% S# C3 \
- uvSize: [1, 1]
% d& P& }- D. f% x7 U - }1 j8 c9 l: r1 |% c1 m; s5 ?! @
- }
1 A) A' C7 x" D! j9 M! P! r - let f = new Face(info);
9 C* @) g8 M+ O; w+ N, M - state.f = f;* O0 t' a- ~: q( f" O" w2 |
- $ Y, [& O/ N. R( ~* f; o2 C2 V
- let t = f.texture;
# K/ i* u; s! `( T' Y - let g = t.graphics;
' v+ ] |3 C1 S - state.running = true;' k" i ]: y7 f* o5 F- N
- let fps = 24;' ?( c- e: o1 m5 r" D0 B _- ]
- da(g);//绘制底图7 M2 a# h4 p: q$ K1 m
- t.upload();6 z, k2 d$ [% ?5 l( |
- let k = 0;5 ~- e0 k+ g' ~5 [' y
- let ti = Date.now();& Q2 w* w7 X6 r. u
- let rt = 0;
) a0 ^7 y+ h( j7 M - smooth = (k, v) => {// 平滑变化
) N; e T, D4 h* h - if (v > k) return k;
3 b* `+ t: Z# _1 B - if (k < 0) return 0;, S* D7 K' r2 @% c
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;0 h: d! P: z( p. V4 {% I1 |
- }
/ [# a+ H) h5 t8 i* [9 D% I - run = () => {// 新线程
9 V( ^4 q9 m/ k! x5 ^ - let id = Thread.currentThread().getId();
4 L, b ~) U; K y5 Z" [ - print("Thread start:" + id);
" H% H2 e$ I2 t+ h7 @ - while (state.running) {; |- F, ?& @! c% I" B; K/ A1 u
- try {
8 k h' f- u2 U% k - k += (Date.now() - ti) / 1000 * 0.2;" s- F3 T6 b y& |
- ti = Date.now(); s! |' A2 U. B" j5 ~2 F
- if (k > 1.5) {
, K. E) l1 E* a& o7 B" P - k = 0;4 N) f+ }3 e1 z; a. p+ V
- }
k9 N- y% p" Q - setComp(g, 1);4 h: T- Y9 _4 Y% p3 }: |) P* ]9 j8 S
- da(g);
% Z4 d2 b4 C& G! n7 G) q& N/ I - let kk = smooth(1, k);//平滑切换透明度" F6 B% H2 L% ^! W
- setComp(g, kk);
; N. v9 C' @8 _9 D# J - db(g);! Z+ f& C% K: S
- t.upload();& x" P- i$ @8 P3 e5 d
- ctx.setDebugInfo("rt" ,Date.now() - ti);
Q: x5 n8 R0 y. |* B - ctx.setDebugInfo("k", k);3 y! ]1 v* ~5 K- H. I4 C
- ctx.setDebugInfo("sm", kk);3 U3 y( A- t0 [. ~4 _
- rt = Date.now() - ti;. [7 K+ c* K: L! ]. O
- Thread.sleep(ck(rt - 1000 / fps));
% c* u& Z+ }4 D) x. x! L9 H - ctx.setDebugInfo("error", 0)1 `- {$ g4 z# o1 }8 l! y: c& d
- } catch (e) {
1 _2 j) K! ^2 y; K$ L - ctx.setDebugInfo("error", e);
8 M- @2 P5 l9 X9 p - }- _ Z* d& G5 v" I4 t7 p- I& {
- }4 S4 M9 m& C7 H7 ^" B! w! {
- print("Thread end:" + id);9 f/ s) n# B5 i- N
- }
3 u# Q" V. H* h - let th = new Thread(run, "qiehuan");3 q( {! K. g" o* B+ v
- th.start();9 Q4 O( l/ ^- O! w
- }
! |# j z7 c: W8 _! T2 |& J! ?& @
: e& K O( |/ T x- function render(ctx, state, entity) {
! q- n4 C) G" O - state.f.tick();7 _% m! g/ s! W5 X- T T, E
- }
3 Z8 G* `0 x6 t T
/ i u- g: b) ?6 I& L- @+ e5 M& O5 _# Z- function dispose(ctx, state, entity) {
& _" Z& ]. p D- w! V' Y3 [1 c, ^6 t' R% i - print("Dispose");
& {* F) P& q) i* Y. x0 s8 t - state.running = false;6 ]7 ~% [4 L7 [ G
- state.f.close();! Z7 ^, a" \7 `1 }
- }3 z ^- W7 j$ \; r/ L
- 3 p! x& u3 D5 ?/ Z8 n0 K! r
- function setComp(g, value) {- R" }. h& `8 s2 s. S
- g.setComposite(AlphaComposite.SrcOver.derive(value));6 r$ G& M6 a/ a' P) J1 E+ ]
- }
复制代码
) c+ J2 u' a: u( U" `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。9 w }! G- {" @; u, Q
5 c) P: v! @# s4 \. L. _( Y
9 r5 ~8 |$ Y$ T顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下): D( j. V2 p+ F
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