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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。/ u* Z% n8 h1 I9 c
- importPackage (java.lang);; T8 ]+ G' @4 X9 {& y- R2 j! W6 `6 R
- importPackage (java.awt);6 v. J# Y2 N1 B+ J3 M( I( ]
6 l8 b& g3 ?4 n; T4 J- include(Resources.id("mtrsteamloco:library/code/face.js"));
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, W! [3 `7 Y9 I3 r8 x, ^- const font0 = Resources.getSystemFont("Serif").deriveFont(Font.PLAIN, 80);
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0 [; I' _# V+ }( i- function getW(str, font) {
' _% R2 c$ {& c1 }' x) ^: F* K, b$ Y4 x - let frc = Resources.getFontRenderContext();
) L' R! D1 g% U) F0 y; _% e2 I - bounds = font.getStringBounds(str, frc);/ U8 H i) `7 m: C) H! @
- return Math.ceil(bounds.getWidth());8 K" v3 r, H5 _% X2 A# A
- }
/ }3 l; \" \! h9 a$ p
6 S6 o0 m! t. S2 j# g- da = (g) => {//底图绘制9 s; i; e# ]- t9 ~: z% G! }1 p
- g.setColor(Color.BLACK);& o5 Q; L1 u) b$ H; o6 L1 |
- g.fillRect(0, 0, 400, 400);
- T" p, p/ I5 r6 _) ~1 j - }9 a6 i) R$ Q- b2 Y5 J' b4 i0 o
- " r( T9 ^( g' \5 Y
- db = (g) => {//上层绘制
( R/ w8 J( {5 F' U7 ]8 C - g.setColor(Color.WHITE);. i o5 N9 V, |& O& _6 d$ f
- g.fillRect(0, 0, 400, 400);$ ?6 u$ @+ P5 X) a, Q8 I: f3 s
- g.setColor(Color.RED);
4 B: O$ r! n, Z: u! d* Y - g.setFont(font0);* G7 H- \. @1 B2 A: Q/ q7 Q6 N
- let str = "晴纱是男娘";7 A7 ]1 x( y; D+ J* k5 m
- let ww = 400;
- r! j' v6 H$ D9 A - let w = getW(str, font0);
) N( D0 A: g. T1 j3 D% O - g.drawString(str, ww / 2 - w / 2, 200);9 a( @' J0 `6 z8 l0 E
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- 2 h, p) `) y/ z% ~% W9 y! Y
- const mat = new Matrices();2 n2 T2 V+ ?. X, N
- mat.translate(0, 0.5, 0);+ H! h l$ X/ m( t+ R: d" h
8 Q( {0 e4 A* E) ]/ P- function create(ctx, state, entity) {
" b4 q- O+ i: r4 I! s& [+ c - let info = {
1 l! m, I2 ?! N6 K8 K' v - ctx: ctx,# s2 Y' f( ~8 ?1 V& D
- isTrain: false,/ p/ o4 U' {. C3 i3 O
- matrices: [mat],
( M3 b/ F2 o2 O) w) @+ q/ i - texture: [400, 400], ]7 `, ^5 m2 q# R
- model: {
/ ?* t% e8 V' I% a, F - renderType: "light",2 e! q# Q0 h# }- {
- size: [1, 1],2 Y# l6 y6 z! `
- uvSize: [1, 1]! |: C/ s0 ?) x! I0 e8 a
- }" G' N* X4 ]8 U+ D: z
- }. j1 K) [" i2 y# L4 s* [
- let f = new Face(info);9 |. Q$ i! N j, N5 I$ [
- state.f = f;
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6 {# b$ C9 q7 a- let t = f.texture;
# e: {0 F' a& @8 t9 u/ T8 q e" s - let g = t.graphics;$ n; x$ p$ @' b) F" ?/ [4 v7 p
- state.running = true;
: [6 N8 V. P: G; R2 } - let fps = 24;
7 s& g8 z! k' ` - da(g);//绘制底图
- ]5 l4 E h/ m - t.upload();% z& o7 g s, x6 P
- let k = 0;
2 ~: H7 |; j) g6 ^: o$ P2 g( ? - let ti = Date.now();% Z& h# i0 F3 _" }
- let rt = 0;. E- n5 a% T( E7 T* i
- smooth = (k, v) => {// 平滑变化3 \9 ]! ]# a- Y9 i
- if (v > k) return k;& ~2 x0 x2 U0 D9 R* n" ?% q7 d
- if (k < 0) return 0;
5 O( y9 v4 i c$ z- p - return (Math.cos(v / k * Math.PI + Math.PI) + 1) / 2 * k;
' w. n2 c" K0 I4 k" Z/ c& a - }
9 Q9 o* X* |* a" V K+ f - run = () => {// 新线程% {4 |. C4 e& N8 @/ J
- let id = Thread.currentThread().getId();
3 X" v; G! O0 T: Z$ h - print("Thread start:" + id);
, A$ g D) f Q - while (state.running) {& g0 g/ A9 D t( e" c( e( v
- try {3 e6 C$ N! j6 `2 ?& G
- k += (Date.now() - ti) / 1000 * 0.2;* t/ s0 @( M: s9 o$ Z
- ti = Date.now();5 y6 J( F; \1 O4 X( z, P
- if (k > 1.5) {
: p N2 d( s% h! K - k = 0;9 e& l1 s+ ^+ S# Y& @ R$ S
- }
2 v% [+ r8 J# ?3 Z - setComp(g, 1);
2 r' Z2 u/ Z g: F& I - da(g);
( U& Z& d0 V3 _/ B% ~; J% ^1 }3 B. q - let kk = smooth(1, k);//平滑切换透明度
) s8 K2 a' h' k+ v - setComp(g, kk);
7 R; d6 {; P; ` - db(g);9 I9 r- y6 I. Q( P
- t.upload();& }8 B7 j. |: M8 J2 o3 p7 N
- ctx.setDebugInfo("rt" ,Date.now() - ti);0 a( h: U. c% N- a6 }0 j {1 N
- ctx.setDebugInfo("k", k);6 C: r0 O6 Y0 A% z: I5 M
- ctx.setDebugInfo("sm", kk);3 O$ P3 h- F; | t
- rt = Date.now() - ti;/ q! b& e# @, P
- Thread.sleep(ck(rt - 1000 / fps));
, K! p+ }4 J- x) u) v, {2 W, Y - ctx.setDebugInfo("error", 0)
9 M7 s' v. |* C/ O - } catch (e) {: i" H) W/ |; U/ B0 K
- ctx.setDebugInfo("error", e);
/ p3 L* K% i) s$ ?" B - }* a- e/ t- v7 j) r- g" }
- }
9 c* w2 w9 P: r - print("Thread end:" + id);! a+ R1 i/ j9 B$ b3 Y) X. A
- }+ B( r0 l! h: x+ \# C
- let th = new Thread(run, "qiehuan");
1 \6 H2 S" H; s9 O9 @ - th.start();1 U- N c' y/ }5 ]& K/ g# c$ M; {
- }
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5 D! ^: B1 L8 g0 i+ B/ i$ h: @- function render(ctx, state, entity) {5 m" k5 ]' y# f
- state.f.tick();
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$ N7 F% P+ R; V- function dispose(ctx, state, entity) {3 G0 _& G o8 G6 S
- print("Dispose");
7 A& |7 L% t7 i3 L) r! Z - state.running = false;
" G5 _, n) f2 z - state.f.close();" \ x) i" }( {1 s) r
- }, L# U3 Q& e1 Q
6 Q" X" j: E8 I" r+ A- function setComp(g, value) {
f( d4 u, t" Z( l+ D; t - g.setComposite(AlphaComposite.SrcOver.derive(value));$ g; l$ m: p: [* j$ M% [/ {
- }
复制代码
- L% f$ ~3 w* G& o) t% H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)
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