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# z) K# Y9 n) _: Q8 c8 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。7 B, e* U$ S6 ^) k6 m
- importPackage (java.lang);+ z+ S/ x7 l- y% J0 N! [
- importPackage (java.awt);' l3 x$ m7 E/ W( Y7 i6 U& I+ X
- & ?7 f ]9 ]( H$ h9 c
- include(Resources.id("mtrsteamloco:library/code/face.js"));* B- d7 K8 U/ Z: p! Q, I. F0 Z1 H
- , q. R' T, s8 h: S
- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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. Q8 @% T3 N2 a$ z& r; k0 Q. g- function getW(str, font) {1 v" l- a9 y; _( O
- let frc = Resources.getFontRenderContext();
; c9 ?7 Z7 N. h8 x4 v - bounds = font.getStringBounds(str, frc);
3 \7 c/ y1 N/ B& B7 v: W0 y( K - return Math.ceil(bounds.getWidth());- C% D* u% @1 [: Q; E. D
- }+ k* {3 p7 B7 A, r% f6 x
. t% l6 U+ f: y0 n% C3 l- da = (g) => {//底图绘制
: W5 c. s* E$ K4 s. Y* n - g.setColor(Color.BLACK);
9 [. Z% V% n% l2 K - g.fillRect(0, 0, 400, 400);
0 b; U9 V0 ~0 J% v- E. a2 Y. l - }( U5 }: r( @2 Y0 e1 O$ r
! V) a( p0 C+ F+ m& }- db = (g) => {//上层绘制
) w' j0 O9 B: x0 D - g.setColor(Color.WHITE);! H* i. R6 \3 g) r$ ^; \& D! s( [
- g.fillRect(0, 0, 400, 400);
4 P3 {# V" m5 v+ o; { - g.setColor(Color.RED);! g: e$ w. Y7 T4 n- J8 ^6 U
- g.setFont(font0);9 n: W6 Q. M) w9 E1 ?+ g/ I/ B
- let str = "晴纱是男娘";
( L4 f/ H- r$ u$ M8 r! m, i7 V - let ww = 400;4 j% x9 j( N* L- ~
- let w = getW(str, font0);8 s6 S8 `# i2 [" e" n1 k' a1 N0 \
- g.drawString(str, ww / 2 - w / 2, 200);
8 H, l% i2 v6 y - }* q1 }$ }# L) [/ d; [2 L) {5 p7 q5 }
- : R( ^( E2 S+ ~7 ?. V
- const mat = new Matrices();
: y4 q K7 T- W - mat.translate(0, 0.5, 0);
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! b# f2 Y( _+ d7 |- function create(ctx, state, entity) {
) i- I9 H4 t% w - let info = { @1 v7 z" T! J4 K
- ctx: ctx,6 f4 _- z: Q7 }% V
- isTrain: false,2 j. \$ I) v1 t& n P" [
- matrices: [mat],5 d8 a4 J9 v0 N6 u) [
- texture: [400, 400],
$ f) V3 n+ d5 X8 S1 ~8 k" x# K - model: {' t# W; h5 H/ A/ e( \: z( F' W
- renderType: "light",* X/ ^ I8 q3 x0 U8 ^ j% p1 p4 ?1 A
- size: [1, 1],
+ M4 d- j2 B6 m" ^$ P7 w - uvSize: [1, 1]
- o* }" \; z ~: F, } - }
+ ?9 M) _9 s J$ ^& C5 i+ W - }, U/ `! ^; w" K+ w% V
- let f = new Face(info);
y3 _& z: b( T - state.f = f;7 }4 t3 d* @: y1 I7 v: ~8 ?# ]+ ]
- & s* k/ z$ n( u9 k" a8 l
- let t = f.texture;
, z B: @ }0 t0 `* ^# L" ]4 E - let g = t.graphics;: t7 O* w# E# b4 i8 ^7 n% A
- state.running = true;, J5 s7 K# o1 w; a
- let fps = 24;
R" @' A7 J/ H# N" H# i& ? - da(g);//绘制底图
2 a- Y: b) S6 B% F - t.upload();' J( e2 {3 ]$ [4 j* h% P! O! R: z
- let k = 0;' R5 R5 ^/ k, [
- let ti = Date.now();
. l# x' i; c9 K# B - let rt = 0;1 `) V; ~( B8 A6 T2 Z& Z. l7 G
- smooth = (k, v) => {// 平滑变化
. I/ w4 Q8 m9 s9 L; j8 h4 n$ t - if (v > k) return k;1 G% ~( J" F# {! Y6 g. Y
- if (k < 0) return 0;# |3 S1 q) [: o6 j' X' d+ A+ H
- return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;% d `7 c3 d0 L, u
- }
& k& h0 X" X- z1 n$ @ - run = () => {// 新线程: U( C1 T% S. n9 p
- let id = Thread.currentThread().getId();) h. E* B5 w, j0 ^- O
- print("Thread start:" + id);: \: g# n1 V; z9 n F
- while (state.running) {
2 p, [; `" H% Y( D- s - try {* ~) Z9 E0 p6 |! P7 z$ ~9 @
- k += (Date.now() - ti) / 1000 * 0.2;
/ @5 E3 H. y: [: l4 ` - ti = Date.now();
* S* v7 Z8 ?% H1 m8 Y6 { - if (k > 1.5) {
; v8 n/ O1 f5 o: l) d8 q- c7 ]& z - k = 0;
5 [" m+ U9 U$ n# K - }6 o" l9 x) d) d
- setComp(g, 1);4 j% }7 {* s3 z9 i( o
- da(g);
6 o* s- `# ~# A- ] - let kk = smooth(1, k);//平滑切换透明度
, N0 `, t4 q9 g- Z - setComp(g, kk);
! T* z7 d% x, V& C1 a- c - db(g);1 W- _( S' ^% a' n, v! Y' H
- t.upload();
( u6 }" z3 d7 V& R8 }8 ?4 Z3 W1 ^ - ctx.setDebugInfo("rt" ,Date.now() - ti);& J2 x0 y) D. B
- ctx.setDebugInfo("k", k);
& N9 v* @8 a+ {+ q/ F - ctx.setDebugInfo("sm", kk);
7 t9 e9 _0 Y% c1 f2 S* Y - rt = Date.now() - ti;) a! _% z, v9 Z3 V3 |
- Thread.sleep(ck(rt - 1000 / fps));7 A) E: x; @8 U/ {' i; ]% z
- ctx.setDebugInfo("error", 0): s8 @" H9 C1 D. j' h2 ~
- } catch (e) {
! V" b( k% H- @1 V- M7 y* y6 K - ctx.setDebugInfo("error", e);
: i$ s1 d5 l! e/ M: q: u6 c - }
4 X0 N4 q% ?$ Z1 C) I5 C - }
6 I' q4 K) t2 x! o - print("Thread end:" + id);
; g2 R4 N6 l( z6 f4 y$ A - }
, x! C2 K$ h9 X& J9 P7 Q6 s4 D$ V - let th = new Thread(run, "qiehuan");
: F" p& x) `' a, k' y& V3 x# { - th.start();8 h. O5 Z& @8 b
- }- |& p ~$ K/ W5 e
+ A C- p0 _2 L; X% \- function render(ctx, state, entity) {
9 V0 \$ |5 h: B+ |3 P+ a J! w& g - state.f.tick();( \# x9 b' a0 n+ f1 T2 `5 e
- }
; ^ N5 a* M1 M/ u a3 | b - + Z. X6 ]- L6 n% F/ k5 ^
- function dispose(ctx, state, entity) {
" h) M: P2 Y3 @: `8 @ - print("Dispose");* X U% [! ^& L
- state.running = false;
- r5 k2 x4 N7 h1 m" c - state.f.close();
; Y0 @$ u) d* l& b - }- y, O8 K w% Y$ d% k. l
- . h' T* Z' D+ u6 u* E( R
- function setComp(g, value) {- I+ t7 b' R1 I' r! M7 E
- g.setComposite(AlphaComposite.SrcOver.derive(value));5 d: J9 y5 `7 @9 T' w
- }
复制代码
- y! I$ o( r- E7 {$ `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。3 X: k$ y3 e# p8 S8 m
8 y& a. J) Q" K$ H9 W9 Z" z+ z8 M3 ?& R% ^3 [( y% ?( m
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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