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; i `" G5 a$ [1 C" H1 e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。
, M2 J3 ~7 ], S. X$ X4 [2 o- importPackage (java.lang);; N0 u, Y" P% G6 Q8 }8 Y2 e3 b
- importPackage (java.awt);) n: ^( r) P) E4 G8 r2 G9 Q
- " d; l8 Z8 J. l U# R4 `: H
- include(Resources.id("mtrsteamloco:library/code/face.js"));
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% j! Z. o: ~# q1 g: r6 C- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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4 d: N/ L8 h$ S; x- function getW(str, font) {
, k9 C& v; X* v8 h% j1 ` - let frc = Resources.getFontRenderContext();
# D: k, H, e1 _+ v/ ^9 }& e5 S - bounds = font.getStringBounds(str, frc);
* g4 P7 ]( j/ o+ V6 ~ - return Math.ceil(bounds.getWidth());$ S* i/ E3 i& e0 o) ?
- }
# e3 |0 ?' A! h7 ^& K' i
3 s" D) P* k! v- z9 ~- da = (g) => {//底图绘制$ I3 ]5 d/ C6 j; Y' o
- g.setColor(Color.BLACK);
~* \- F7 A6 T* L - g.fillRect(0, 0, 400, 400);: i' B1 C" O" ?6 n
- }
/ n: R8 r: s* x - 7 g2 X3 R O0 R' V9 W) @+ m
- db = (g) => {//上层绘制6 f4 Z7 l F" T# y6 W8 R) \8 Y- [
- g.setColor(Color.WHITE);
' D7 M. a. l, p4 _8 \4 F+ U2 ? - g.fillRect(0, 0, 400, 400);
$ n1 a2 W3 S+ T( W" P - g.setColor(Color.RED);
g( `5 A3 w) E4 } |8 k+ M - g.setFont(font0);
: L9 Q' Y3 R4 j8 [2 q' A a7 m - let str = "晴纱是男娘";
& [. M$ \" ~, q" x+ y3 I - let ww = 400;" D# G( V3 ^ K+ z! u0 F0 a
- let w = getW(str, font0);8 a z1 W3 q+ e& O& n* m
- g.drawString(str, ww / 2 - w / 2, 200);+ h4 z6 d7 ?# G# f2 |# ?3 {3 g6 J
- } ?3 f: y" ^! S$ n9 x
, `+ W" y; n4 n1 {- const mat = new Matrices();" E. |1 B/ ], Z$ a
- mat.translate(0, 0.5, 0);
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( M* S2 O' H4 [* f- function create(ctx, state, entity) {
8 }3 p; w1 V+ K# E6 Y - let info = {( @" k( Z8 O& D& x6 g8 N
- ctx: ctx,9 q. Q( M( M3 d
- isTrain: false,
. D8 F! k- f+ L" z% G; G - matrices: [mat],4 C* W9 r4 A8 l j
- texture: [400, 400],
8 f+ F. M6 ^" I7 | - model: {
+ g7 M/ h( y4 k7 I, Y, w( Q6 ?3 r - renderType: "light",
, k" C# _ B/ N! a - size: [1, 1],
- Y3 P8 l# i* ]) p) u - uvSize: [1, 1]) x4 u: ~2 B5 H( {8 Z8 P
- }
6 \4 I1 T8 P+ M: Y - }
5 h" { i3 [5 A' X7 H0 ^* c - let f = new Face(info);
8 u" N* y; n9 f - state.f = f;( ? R" [) O% Y
- - D3 W3 F, e" @1 Z! m! i
- let t = f.texture;. `1 o* D4 w! `7 B# B0 r r# h
- let g = t.graphics;" N" b& c" J" j) e6 }6 ]6 n6 B
- state.running = true;
5 S M( |! D& K6 { - let fps = 24;
" Y; k* m5 C" O; _ - da(g);//绘制底图
6 R( I) ^! r, @3 g9 p% S - t.upload();
* s+ g# r0 P1 ~) m - let k = 0;7 d+ F- W" ?+ R, G# q( y$ { Q( T
- let ti = Date.now();
, S# a# L0 L( s - let rt = 0;
) i2 ?7 M! ~% n; ~ - smooth = (k, v) => {// 平滑变化' r5 W- }8 V, k5 b6 G
- if (v > k) return k;# [. H* h5 d" @: h. D
- if (k < 0) return 0;
" v w1 h, \( I( C - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
. g( F2 n, E9 w1 l - }7 W$ B, S- a7 `& b4 d
- run = () => {// 新线程
3 D8 N. v' n9 H, A, w/ {: w - let id = Thread.currentThread().getId();, `; e. D, w% V1 D$ i/ M6 A
- print("Thread start:" + id);
9 w, w0 \. a0 p+ s8 c; r8 a# ` - while (state.running) {
3 L: {/ z; F4 N0 a - try {& ^. W' z0 g/ z+ ~9 D3 h
- k += (Date.now() - ti) / 1000 * 0.2;( T5 Q5 b; l7 m/ q! \
- ti = Date.now();
" c; [4 V \( Q5 P% S" k% j$ N3 A2 d+ i - if (k > 1.5) {/ @6 v$ J4 K. b0 h! J1 J! y
- k = 0;
/ ~: p! Y9 ?! _ N/ T7 f6 ] - } a- h: ~2 I5 q) l$ Q
- setComp(g, 1);
( Q; F* s0 i D+ f - da(g);& `" I, B" y/ J& A7 @
- let kk = smooth(1, k);//平滑切换透明度 @# n" G4 n+ r6 }. i
- setComp(g, kk);
0 R% }; Q+ }+ c$ @6 b - db(g);
: ~1 f2 F- q5 k9 ? W - t.upload();
$ G2 }8 a U3 b. r/ H - ctx.setDebugInfo("rt" ,Date.now() - ti);
4 |- {- |3 a" |! C9 P1 N n/ Z - ctx.setDebugInfo("k", k);' N& [# e5 y& z) c4 b6 g: j
- ctx.setDebugInfo("sm", kk);) T% t4 R& H+ X6 r& l& |3 o
- rt = Date.now() - ti; o- ]$ C* P6 \. _) Z
- Thread.sleep(ck(rt - 1000 / fps));' w! [, T: A4 w4 ^% k; W
- ctx.setDebugInfo("error", 0)% e* \+ O% ?( `! _; c2 Y( P; C
- } catch (e) {8 L' a$ x9 v7 O G8 h9 |6 T% Z+ ?
- ctx.setDebugInfo("error", e);; p0 M, ?- Q8 S" _! O: \" l
- }
$ ]% [, u6 I7 R! Z - }8 }7 v# u- ?4 S
- print("Thread end:" + id);
, L7 Y+ ^+ U2 U O; ^$ p# h2 D7 J - }
' H2 P2 o4 ^; ]8 W4 }. @) s - let th = new Thread(run, "qiehuan");; |! f+ ?1 w, T3 v
- th.start();
& ?4 \4 |6 I2 I) Q( ` - }
: `; F( H) a( i( k6 j - 3 N3 c! j% I0 r# U/ O/ Q0 z
- function render(ctx, state, entity) {: _6 R, z2 U9 M9 e1 N
- state.f.tick();7 U1 K6 J1 ]$ K& i8 }
- }! P, [8 T( r* S% K
( ?2 a. C+ @: s* V- S- U7 B* M- function dispose(ctx, state, entity) {
. R) D% k7 C, U: D - print("Dispose");
4 d. L* _3 \/ V1 }4 d, j7 G! [ - state.running = false;
, g$ u6 X- }/ p; v5 _# Y' x% U - state.f.close();
6 d$ [4 y2 ~6 T( c* G" Y; [ X7 y$ y - }
9 b% c) S, }) X5 Q8 Q5 T4 Q! p) z - ! v: e) U. @& c( P4 N/ u' \
- function setComp(g, value) {( v) c. \' d& c/ E* n
- g.setComposite(AlphaComposite.SrcOver.derive(value)); j* ?& e- A( @# ? q# F" m
- }
复制代码 1 N3 N1 |9 n+ J C; D
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。
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顺带一提,完成的时间挺短的,一次是 2 ms 左右(当前情况下)" ]- ]+ N5 K" G" p* R
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